* Package: dev-cpp/gconfmm-2.28.3-r1 * Repository: gentoo * Maintainer: gnome@gentoo.org * USE: abi_x86_64 amd64 elibc_glibc kernel_linux userland_GNU * FEATURES: network-sandbox preserve-libs sandbox splitdebug userpriv usersandbox >>> Unpacking source... >>> Unpacking gconfmm-2.28.3.tar.bz2 to /var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/work >>> Source unpacked in /var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/work >>> Preparing source in /var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/work/gconfmm-2.28.3 ... * Fixing OMF Makefiles ... [ ok ] * Disabling deprecation warnings ... [ ok ] * Running elibtoolize in: gconfmm-2.28.3/ * Applying target-nm/2.4.2 patch ... * Applying ppc64le/2.4.2 patch ... * Running elibtoolize in: gconfmm-2.28.3/build/ * Applying portage/1.2.0 patch ... * Applying sed/1.5.6 patch ... * Applying as-needed/2.2.6 patch ... >>> Source prepared. >>> Configuring source in /var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/work/gconfmm-2.28.3 ... * econf: updating gconfmm-2.28.3/build/config.sub with /usr/share/gnuconfig/config.sub * econf: updating gconfmm-2.28.3/build/config.guess with /usr/share/gnuconfig/config.guess ./configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --disable-dependency-tracking --disable-silent-rules --libdir=/usr/lib64 --docdir=/usr/share/doc/gconfmm-2.28.3-r1 --disable-documentation configure: loading site script /usr/share/config.site checking for a BSD-compatible install... /usr/lib/portage/python3.8/ebuild-helpers/xattr/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /bin/mkdir -p checking for gawk... gawk checking whether make sets $(MAKE)... yes checking how to create a ustar tar archive... gnutar checking whether to enable maintainer-specific portions of Makefiles... no checking whether make supports GNU make features... yes checking for x86_64-pc-linux-gnu-g++... x86_64-pc-linux-gnu-g++ checking whether the C++ compiler works... yes checking for C++ compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C++ compiler... yes checking whether x86_64-pc-linux-gnu-g++ accepts -g... yes checking for style of include used by make... GNU checking dependency style of x86_64-pc-linux-gnu-g++... none checking build system type... x86_64-pc-linux-gnu checking host system type... x86_64-pc-linux-gnu checking how to print strings... printf checking for x86_64-pc-linux-gnu-gcc... x86_64-pc-linux-gnu-gcc checking whether we are using the GNU C compiler... yes checking whether x86_64-pc-linux-gnu-gcc accepts -g... yes checking for x86_64-pc-linux-gnu-gcc option to accept ISO C89... none needed checking dependency style of x86_64-pc-linux-gnu-gcc... none checking for a sed that does not truncate output... /bin/sed checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for fgrep... /bin/grep -F checking for ld used by x86_64-pc-linux-gnu-gcc... /usr/x86_64-pc-linux-gnu/bin/ld checking if the linker (/usr/x86_64-pc-linux-gnu/bin/ld) is GNU ld... yes checking for BSD- or MS-compatible name lister (nm)... /usr/bin/x86_64-pc-linux-gnu-nm -B checking the name lister (/usr/bin/x86_64-pc-linux-gnu-nm -B) interface... BSD nm checking whether ln -s works... yes checking the maximum length of command line arguments... 1572864 checking whether the shell understands some XSI constructs... yes checking whether the shell understands "+="... yes checking how to convert x86_64-pc-linux-gnu file names to x86_64-pc-linux-gnu format... func_convert_file_noop checking how to convert x86_64-pc-linux-gnu file names to toolchain format... func_convert_file_noop checking for /usr/x86_64-pc-linux-gnu/bin/ld option to reload object files... -r checking for x86_64-pc-linux-gnu-objdump... objdump checking how to recognize dependent libraries... pass_all checking for x86_64-pc-linux-gnu-dlltool... dlltool checking how to associate runtime and link libraries... printf %s\n checking for x86_64-pc-linux-gnu-ar... x86_64-pc-linux-gnu-ar checking for archiver @FILE support... @ checking for x86_64-pc-linux-gnu-strip... x86_64-pc-linux-gnu-strip checking for x86_64-pc-linux-gnu-ranlib... x86_64-pc-linux-gnu-ranlib checking command to parse /usr/bin/x86_64-pc-linux-gnu-nm -B output from x86_64-pc-linux-gnu-gcc object... ok checking for sysroot... no checking for x86_64-pc-linux-gnu-mt... no checking for mt... no checking if : is a manifest tool... no checking how to run the C preprocessor... x86_64-pc-linux-gnu-gcc -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking for dlfcn.h... yes checking for objdir... .libs checking if x86_64-pc-linux-gnu-gcc supports -fno-rtti -fno-exceptions... no checking for x86_64-pc-linux-gnu-gcc option to produce PIC... -fPIC -DPIC checking if x86_64-pc-linux-gnu-gcc PIC flag -fPIC -DPIC works... yes checking if x86_64-pc-linux-gnu-gcc static flag -static works... yes checking if x86_64-pc-linux-gnu-gcc supports -c -o file.o... yes checking if x86_64-pc-linux-gnu-gcc supports -c -o file.o... (cached) yes checking whether the x86_64-pc-linux-gnu-gcc linker (/usr/x86_64-pc-linux-gnu/bin/ld -m elf_x86_64) supports shared libraries... yes checking whether -lc should be explicitly linked in... no checking dynamic linker characteristics... GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking whether stripping libraries is possible... yes checking if libtool supports shared libraries... yes checking whether to build shared libraries... yes checking whether to build static libraries... no checking how to run the C++ preprocessor... x86_64-pc-linux-gnu-g++ -E checking for ld used by x86_64-pc-linux-gnu-g++... /usr/x86_64-pc-linux-gnu/bin/ld -m elf_x86_64 checking if the linker (/usr/x86_64-pc-linux-gnu/bin/ld -m elf_x86_64) is GNU ld... yes checking whether the x86_64-pc-linux-gnu-g++ linker (/usr/x86_64-pc-linux-gnu/bin/ld -m elf_x86_64) supports shared libraries... yes checking for x86_64-pc-linux-gnu-g++ option to produce PIC... -fPIC -DPIC checking if x86_64-pc-linux-gnu-g++ PIC flag -fPIC -DPIC works... yes checking if x86_64-pc-linux-gnu-g++ static flag -static works... yes checking if x86_64-pc-linux-gnu-g++ supports -c -o file.o... yes checking if x86_64-pc-linux-gnu-g++ supports -c -o file.o... (cached) yes checking whether the x86_64-pc-linux-gnu-g++ linker (/usr/x86_64-pc-linux-gnu/bin/ld -m elf_x86_64) supports shared libraries... yes checking dynamic linker characteristics... (cached) GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking for x86_64-pc-linux-gnu-pkg-config... /usr/bin/x86_64-pc-linux-gnu-pkg-config checking pkg-config is at least version 0.9.0... yes checking for GCONFMM... yes checking for GTHREAD_CFLAGS... -pthread checking for GMMPROC_DIR... /usr/lib64/glibmm-2.4/proc configure: Deprecated API will be built, for backwards-compatibility. checking for perl... /usr/bin/perl checking for dot... dot checking for doxygen... /usr/bin/doxygen checking for xsltproc... /usr/bin/xsltproc checking which C++ compiler warning flags to use... -Wall configure: creating ./config.status config.status: creating Makefile config.status: creating tools/Makefile config.status: creating gconf/gconfmm-2.6.pc config.status: creating gconf/gconfmm-2.6-uninstalled.pc config.status: creating gconf/src/Makefile config.status: creating gconf/gconfmm/Makefile config.status: creating docs/Makefile config.status: creating docs/reference/Doxyfile config.status: creating config.h config.status: creating gconf/gconfmmconfig.h config.status: executing depfiles commands config.status: executing libtool commands >>> Source configured. >>> Compiling source in /var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/work/gconfmm-2.28.3 ... make -j 1 make all-recursive make[1]: Entering directory '/var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/work/gconfmm-2.28.3' Making all in gconf/gconfmm make[2]: Entering directory '/var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/work/gconfmm-2.28.3/gconf/gconfmm' \ # source='client.cc' object='client.lo' libtool=yes /bin/sh ../../libtool --tag=CXX --mode=compile x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c -o client.lo client.cc libtool: compile: x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c client.cc -fPIC -DPIC -o .libs/client.o In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from /usr/include/gconf/2/gconf/gconf-client.h:25, from ../gconfmm/client.h:31, from client.cc:4: /usr/include/gconf/2/gconf/gconf-value.h:139:10: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 139 | GTime mod_time; /* time of the modification */ | ^~~~~~~~ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/client.h:7, from client.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from /usr/include/gconf/2/gconf/gconf-client.h:25, from ../gconfmm/client.h:31, from client.cc:4: /usr/include/gconf/2/gconf/gconf-value.h:144:62: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 144 | GTime gconf_meta_info_mod_time (GConfMetaInfo *gcmi); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/client.h:7, from client.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from /usr/include/gconf/2/gconf/gconf-client.h:25, from ../gconfmm/client.h:31, from client.cc:4: /usr/include/gconf/2/gconf/gconf-value.h:153:69: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 153 | GTime mod_time); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/client.h:7, from client.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ \ # source='entry.cc' object='entry.lo' libtool=yes /bin/sh ../../libtool --tag=CXX --mode=compile x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c -o entry.lo entry.cc libtool: compile: x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c entry.cc -fPIC -DPIC -o .libs/entry.o In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from ../gconfmm/schema.h:36, from ../gconfmm/entry.h:32, from entry.cc:4: /usr/include/gconf/2/gconf/gconf-value.h:139:10: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 139 | GTime mod_time; /* time of the modification */ | ^~~~~~~~ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/entry.h:7, from entry.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from ../gconfmm/schema.h:36, from ../gconfmm/entry.h:32, from entry.cc:4: /usr/include/gconf/2/gconf/gconf-value.h:144:62: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 144 | GTime gconf_meta_info_mod_time (GConfMetaInfo *gcmi); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/entry.h:7, from entry.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from ../gconfmm/schema.h:36, from ../gconfmm/entry.h:32, from entry.cc:4: /usr/include/gconf/2/gconf/gconf-value.h:153:69: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 153 | GTime mod_time); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/entry.h:7, from entry.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ \ # source='schema.cc' object='schema.lo' libtool=yes /bin/sh ../../libtool --tag=CXX --mode=compile x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c -o schema.lo schema.cc libtool: compile: x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c schema.cc -fPIC -DPIC -o .libs/schema.o In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from ../gconfmm/schema.h:36, from schema.cc:4: /usr/include/gconf/2/gconf/gconf-value.h:139:10: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 139 | GTime mod_time; /* time of the modification */ | ^~~~~~~~ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/schema.h:7, from schema.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from ../gconfmm/schema.h:36, from schema.cc:4: /usr/include/gconf/2/gconf/gconf-value.h:144:62: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 144 | GTime gconf_meta_info_mod_time (GConfMetaInfo *gcmi); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/schema.h:7, from schema.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from ../gconfmm/schema.h:36, from schema.cc:4: /usr/include/gconf/2/gconf/gconf-value.h:153:69: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 153 | GTime mod_time); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/schema.h:7, from schema.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ \ # source='value.cc' object='value.lo' libtool=yes /bin/sh ../../libtool --tag=CXX --mode=compile x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c -o value.lo value.cc libtool: compile: x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c value.cc -fPIC -DPIC -o .libs/value.o In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from value.cc:29: /usr/include/gconf/2/gconf/gconf-value.h:139:10: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 139 | GTime mod_time; /* time of the modification */ | ^~~~~~~~ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/value.h:7, from value.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from value.cc:29: /usr/include/gconf/2/gconf/gconf-value.h:144:62: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 144 | GTime gconf_meta_info_mod_time (GConfMetaInfo *gcmi); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/value.h:7, from value.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from value.cc:29: /usr/include/gconf/2/gconf/gconf-value.h:153:69: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 153 | GTime mod_time); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/value.h:7, from value.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ \ # source='changeset.cc' object='changeset.lo' libtool=yes /bin/sh ../../libtool --tag=CXX --mode=compile x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c -o changeset.lo changeset.cc libtool: compile: x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c changeset.cc -fPIC -DPIC -o .libs/changeset.o In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from /usr/include/gconf/2/gconf/gconf-changeset.h:23, from changeset.cc:29: /usr/include/gconf/2/gconf/gconf-value.h:139:10: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 139 | GTime mod_time; /* time of the modification */ | ^~~~~~~~ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/changeset.h:7, from changeset.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from /usr/include/gconf/2/gconf/gconf-changeset.h:23, from changeset.cc:29: /usr/include/gconf/2/gconf/gconf-value.h:144:62: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 144 | GTime gconf_meta_info_mod_time (GConfMetaInfo *gcmi); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/changeset.h:7, from changeset.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from /usr/include/gconf/2/gconf/gconf-changeset.h:23, from changeset.cc:29: /usr/include/gconf/2/gconf/gconf-value.h:153:69: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 153 | GTime mod_time); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glibmm-2.4/glibmm/thread.h:39, from /usr/include/glibmm-2.4/glibmm.h:103, from ../gconfmm/changeset.h:7, from changeset.cc:4: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ \ # source='wrap_init.cc' object='wrap_init.lo' libtool=yes /bin/sh ../../libtool --tag=CXX --mode=compile x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c -o wrap_init.lo wrap_init.cc libtool: compile: x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c wrap_init.cc -fPIC -DPIC -o .libs/wrap_init.o In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from /usr/include/gconf/2/gconf/gconf-client.h:25, from client.h:31, from wrap_init.cc:16: /usr/include/gconf/2/gconf/gconf-value.h:139:10: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 139 | GTime mod_time; /* time of the modification */ | ^~~~~~~~ In file included from /usr/include/glib-2.0/glib.h:43, from wrap_init.cc:2: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from /usr/include/gconf/2/gconf/gconf-client.h:25, from client.h:31, from wrap_init.cc:16: /usr/include/gconf/2/gconf/gconf-value.h:144:62: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 144 | GTime gconf_meta_info_mod_time (GConfMetaInfo *gcmi); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from wrap_init.cc:2: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from /usr/include/gconf/2/gconf/gconf-client.h:25, from client.h:31, from wrap_init.cc:16: /usr/include/gconf/2/gconf/gconf-value.h:153:69: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 153 | GTime mod_time); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from wrap_init.cc:2: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ \ # source='init.cc' object='init.lo' libtool=yes /bin/sh ../../libtool --tag=CXX --mode=compile x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c -o init.lo init.cc libtool: compile: x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c init.cc -fPIC -DPIC -o .libs/init.o \ # source='callback.cc' object='callback.lo' libtool=yes /bin/sh ../../libtool --tag=CXX --mode=compile x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c -o callback.lo callback.cc libtool: compile: x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gconfmm\" -DGCONFMM_BUILD=1 -pthread -pthread -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/lib64/libffi/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Wall -pipe -march=native -fno-diagnostics-color -Og -g -std=c++11 -c callback.cc -fPIC -DPIC -o .libs/callback.o In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:56:3: error: template with C linkage 56 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:71:3: error: template with C linkage 71 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:80:3: error: template with C linkage 80 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:91:3: error: template with C linkage 91 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:94:3: error: template with C linkage 94 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:98:3: error: template with C linkage 98 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:101:3: error: template with C linkage 101 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:104:3: error: template specialization with C linkage 104 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:109:3: error: template with C linkage 109 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:114:3: error: template with C linkage 114 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:119:3: error: template with C linkage 119 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:124:3: error: template with C linkage 124 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:127:3: error: template specialization with C linkage 127 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:132:3: error: template with C linkage 132 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:137:3: error: template with C linkage 137 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:142:3: error: template with C linkage 142 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:147:3: error: template with C linkage 147 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:188:3: error: template with C linkage 188 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:190:3: error: template with C linkage 190 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:192:3: error: template with C linkage 192 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:194:3: error: template with C linkage 194 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:200:3: error: template with C linkage 200 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:204:3: error: template with C linkage 204 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:226:3: error: template with C linkage 226 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:230:3: error: template with C linkage 230 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:233:3: error: template with C linkage 233 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:238:3: error: template with C linkage 238 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:242:3: error: template specialization with C linkage 242 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:247:3: error: template with C linkage 247 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:252:3: error: template with C linkage 252 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:256:3: error: template specialization with C linkage 256 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:260:3: error: template specialization with C linkage 260 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:264:3: error: template specialization with C linkage 264 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:268:3: error: template specialization with C linkage 268 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:273:3: error: template specialization with C linkage 273 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:284:3: error: template specialization with C linkage 284 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:288:3: error: template specialization with C linkage 288 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:292:3: error: template specialization with C linkage 292 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:296:3: error: template specialization with C linkage 296 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:300:3: error: template specialization with C linkage 300 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:304:3: error: template specialization with C linkage 304 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:308:3: error: template specialization with C linkage 308 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:312:3: error: template specialization with C linkage 312 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:316:3: error: template specialization with C linkage 316 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:320:3: error: template specialization with C linkage 320 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:364:3: error: template with C linkage 364 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:369:3: error: template with C linkage 369 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:373:3: error: template specialization with C linkage 373 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:377:3: error: template specialization with C linkage 377 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:381:3: error: template specialization with C linkage 381 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:392:3: error: template with C linkage 392 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:398:3: error: template with C linkage 398 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:402:3: error: template with C linkage 402 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:406:3: error: template with C linkage 406 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:410:3: error: template with C linkage 410 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:414:3: error: template with C linkage 414 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:419:3: error: template with C linkage 419 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:425:3: error: template with C linkage 425 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:429:3: error: template with C linkage 429 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:434:3: error: template with C linkage 434 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:438:3: error: template with C linkage 438 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:442:3: error: template with C linkage 442 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:446:3: error: template with C linkage 446 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:451:3: error: template with C linkage 451 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:456:3: error: template with C linkage 456 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:460:3: error: template with C linkage 460 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:465:3: error: template with C linkage 465 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:471:3: error: template with C linkage 471 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:477:3: error: template with C linkage 477 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:483:3: error: template with C linkage 483 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:489:3: error: template with C linkage 489 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:493:3: error: template with C linkage 493 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:497:3: error: template with C linkage 497 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:503:3: error: template with C linkage 503 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:507:3: error: template specialization with C linkage 507 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:512:3: error: template with C linkage 512 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:518:3: error: template with C linkage 518 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:526:3: error: template with C linkage 526 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:533:3: error: template with C linkage 533 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:539:3: error: template with C linkage 539 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:546:3: error: template with C linkage 546 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:552:3: error: template with C linkage 552 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:556:3: error: template with C linkage 556 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:563:3: error: template with C linkage 563 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:567:3: error: template with C linkage 567 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:571:3: error: template with C linkage 571 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:576:3: error: template with C linkage 576 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:581:3: error: template with C linkage 581 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:584:3: error: template with C linkage 584 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:588:3: error: template with C linkage 588 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:607:3: error: template with C linkage 607 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:626:3: error: template with C linkage 626 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:631:3: error: template with C linkage 631 | template using __void_t = void; | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:635:3: error: template with C linkage 635 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:640:3: error: template with C linkage 640 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:648:3: error: template with C linkage 648 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:652:3: error: template with C linkage 652 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:657:3: error: template with C linkage 657 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:661:3: error: template with C linkage 661 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:666:3: error: template with C linkage 666 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:675:3: error: template with C linkage 675 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:684:3: error: template with C linkage 684 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:694:3: error: template with C linkage 694 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:705:3: error: template with C linkage 705 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:714:3: error: template with C linkage 714 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:720:3: error: template with C linkage 720 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:735:3: error: template with C linkage 735 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:740:3: error: template with C linkage 740 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:751:3: error: template with C linkage 751 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:757:3: error: template with C linkage 757 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:770:3: error: template with C linkage 770 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:774:3: error: template with C linkage 774 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:778:3: error: template with C linkage 778 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:781:3: error: template with C linkage 781 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:784:3: error: template with C linkage 784 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:787:3: error: template with C linkage 787 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:792:3: error: template with C linkage 792 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:804:5: error: template with C linkage 804 | template().~_Tp())> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:807:5: error: template with C linkage 807 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:811:3: error: template with C linkage 811 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:818:3: error: template with C linkage 818 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:831:3: error: template with C linkage 831 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:835:3: error: template with C linkage 835 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:840:3: error: template with C linkage 840 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:854:5: error: template with C linkage 854 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:858:5: error: template with C linkage 858 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:862:3: error: template with C linkage 862 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:869:3: error: template with C linkage 869 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:882:3: error: template with C linkage 882 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:886:3: error: template with C linkage 886 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:891:3: error: template with C linkage 891 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:899:3: error: template with C linkage 899 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:905:3: error: template with C linkage 905 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:914:3: error: template with C linkage 914 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:922:3: error: template with C linkage 922 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:925:3: error: template with C linkage 925 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:929:3: error: template with C linkage 929 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:935:3: error: template with C linkage 935 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:943:3: error: template with C linkage 943 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:946:3: error: template with C linkage 946 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:950:3: error: template with C linkage 950 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:956:3: error: template with C linkage 956 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:964:3: error: template with C linkage 964 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:969:3: error: template with C linkage 969 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:974:3: error: template with C linkage 974 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:979:3: error: template with C linkage 979 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:984:3: error: template with C linkage 984 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1001:3: error: template with C linkage 1001 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1007:3: error: template with C linkage 1007 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1016:3: error: template with C linkage 1016 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1025:3: error: template with C linkage 1025 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1028:3: error: template with C linkage 1028 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1032:3: error: template with C linkage 1032 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1038:3: error: template with C linkage 1038 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1046:3: error: template with C linkage 1046 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1049:3: error: template with C linkage 1049 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1053:3: error: template with C linkage 1053 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1059:3: error: template with C linkage 1059 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1068:3: error: template with C linkage 1068 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1076:3: error: template with C linkage 1076 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1079:3: error: template with C linkage 1079 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1083:3: error: template with C linkage 1083 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1089:3: error: template with C linkage 1089 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1097:3: error: template with C linkage 1097 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1100:3: error: template with C linkage 1100 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1104:3: error: template with C linkage 1104 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1110:3: error: template with C linkage 1110 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1118:3: error: template with C linkage 1118 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1123:3: error: template with C linkage 1123 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1130:3: error: template with C linkage 1130 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1138:3: error: template with C linkage 1138 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1141:3: error: template with C linkage 1141 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1145:3: error: template with C linkage 1145 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1151:3: error: template with C linkage 1151 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1159:3: error: template with C linkage 1159 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1162:3: error: template with C linkage 1162 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1166:3: error: template with C linkage 1166 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1172:3: error: template with C linkage 1172 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1181:3: error: template with C linkage 1181 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1190:3: error: template with C linkage 1190 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1200:5: error: template with C linkage 1200 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1203:5: error: template with C linkage 1203 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1210:3: error: template with C linkage 1210 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1217:3: error: template with C linkage 1217 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1222:3: error: template with C linkage 1222 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1228:3: error: template with C linkage 1228 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1231:3: error: template with C linkage 1231 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1235:3: error: template with C linkage 1235 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1243:3: error: template with C linkage 1243 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1251:3: error: template with C linkage 1251 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1254:3: error: template with C linkage 1254 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1258:3: error: template with C linkage 1258 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1266:3: error: template with C linkage 1266 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1275:3: error: template with C linkage 1275 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1283:3: error: template with C linkage 1283 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1286:3: error: template with C linkage 1286 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1290:3: error: template with C linkage 1290 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1296:3: error: template with C linkage 1296 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1304:3: error: template with C linkage 1304 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1307:3: error: template with C linkage 1307 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1311:3: error: template with C linkage 1311 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1317:3: error: template with C linkage 1317 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1326:3: error: template with C linkage 1326 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1337:3: error: template with C linkage 1337 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1349:3: error: template with C linkage 1349 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1358:3: error: template with C linkage 1358 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1362:3: error: template with C linkage 1362 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1366:3: error: template with C linkage 1366 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1371:3: error: template with C linkage 1371 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1375:3: error: template with C linkage 1375 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1382:3: error: template with C linkage 1382 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1393:3: error: template with C linkage 1393 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1410:3: error: template with C linkage 1410 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1415:3: error: template with C linkage 1415 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1446:3: error: template with C linkage 1446 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1452:3: error: template with C linkage 1452 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1456:3: error: template with C linkage 1456 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1486:3: error: template with C linkage 1486 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1508:3: error: template with C linkage 1508 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1512:3: error: template with C linkage 1512 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1517:3: error: template with C linkage 1517 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1521:3: error: template with C linkage 1521 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1526:3: error: template with C linkage 1526 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1530:3: error: template with C linkage 1530 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1534:3: error: template with C linkage 1534 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1538:3: error: template with C linkage 1538 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1543:3: error: template with C linkage 1543 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1548:3: error: template with C linkage 1548 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1553:3: error: template with C linkage 1553 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1592:3: error: template with C linkage 1592 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1596:3: error: template with C linkage 1596 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1600:3: error: template with C linkage 1600 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1604:3: error: template with C linkage 1604 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1608:3: error: template with C linkage 1608 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1613:3: error: template with C linkage 1613 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1618:3: error: template with C linkage 1618 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1622:3: error: template with C linkage 1622 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1627:3: error: template with C linkage 1627 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1649:3: error: template with C linkage 1649 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1652:3: error: template with C linkage 1652 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1656:3: error: template with C linkage 1656 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1660:3: error: template with C linkage 1660 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1664:3: error: template with C linkage 1664 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1668:3: error: template with C linkage 1668 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1684:3: error: template specialization with C linkage 1684 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1688:3: error: template specialization with C linkage 1688 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1692:3: error: template specialization with C linkage 1692 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1696:3: error: template specialization with C linkage 1696 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1700:3: error: template specialization with C linkage 1700 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1704:3: error: template specialization with C linkage 1704 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1730:3: error: template with C linkage 1730 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1749:5: error: template with C linkage 1749 | template struct _List { }; | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1751:5: error: template with C linkage 1751 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1755:5: error: template with C linkage 1755 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1758:5: error: template with C linkage 1758 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1762:5: error: template with C linkage 1762 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1769:3: error: template with C linkage 1769 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1789:3: error: template specialization with C linkage 1789 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1806:3: error: template specialization with C linkage 1806 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1813:3: error: template specialization with C linkage 1813 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1824:3: error: template with C linkage 1824 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1829:3: error: template specialization with C linkage 1829 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1834:3: error: template with C linkage 1834 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1838:3: error: template specialization with C linkage 1838 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1842:3: error: template specialization with C linkage 1842 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1846:3: error: template specialization with C linkage 1846 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1850:3: error: template specialization with C linkage 1850 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1854:3: error: template specialization with C linkage 1854 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1858:3: error: template specialization with C linkage 1858 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1884:3: error: template with C linkage 1884 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1901:3: error: template with C linkage 1901 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1915:3: error: template specialization with C linkage 1915 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1932:3: error: template specialization with C linkage 1932 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1939:3: error: template specialization with C linkage 1939 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1950:3: error: template with C linkage 1950 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1955:3: error: template specialization with C linkage 1955 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1971:3: error: template with C linkage 1971 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1975:3: error: template with C linkage 1975 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1979:3: error: template with C linkage 1979 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1984:3: error: template with C linkage 1984 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1988:3: error: template with C linkage 1988 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1992:3: error: template with C linkage 1992 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2008:3: error: template with C linkage 2008 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2012:3: error: template with C linkage 2012 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2017:3: error: template with C linkage 2017 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2023:3: error: template with C linkage 2023 | template, | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2028:3: error: template with C linkage 2028 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2032:3: error: template with C linkage 2032 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2047:3: error: template with C linkage 2047 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2067:3: error: template with C linkage 2067 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2085:3: error: template with C linkage 2085 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2106:3: error: template with C linkage 2106 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2122:3: error: template with C linkage 2122 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2127:3: error: template with C linkage 2127 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2137:3: error: template with C linkage 2137 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2141:3: error: template with C linkage 2141 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2146:3: error: template with C linkage 2146 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2156:3: error: template with C linkage 2156 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2159:3: error: template with C linkage 2159 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2163:3: error: template with C linkage 2163 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2169:3: error: template with C linkage 2169 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2175:3: error: template with C linkage 2175 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2181:3: error: template with C linkage 2181 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2186:3: error: template with C linkage 2186 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2191:3: error: template with C linkage 2191 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2194:3: error: template with C linkage 2194 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2199:3: error: template with C linkage 2199 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2204:3: error: template with C linkage 2204 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2209:3: error: template with C linkage 2209 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2214:3: error: template with C linkage 2214 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2221:5: error: template with C linkage 2221 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2227:5: error: template with C linkage 2227 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2239:5: error: template with C linkage 2239 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2243:5: error: template with C linkage 2243 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2249:3: error: template specialization with C linkage 2249 | template<> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2254:3: error: template with C linkage 2254 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2260:3: error: template with C linkage 2260 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2279:3: error: template with C linkage 2279 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2284:3: error: template with C linkage 2284 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2288:3: error: template with C linkage 2288 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2292:3: error: template with C linkage 2292 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2301:3: error: template with C linkage 2301 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2308:3: error: template with C linkage 2308 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2312:3: error: template with C linkage 2312 | template::value> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2318:3: error: template with C linkage 2318 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2323:3: error: template with C linkage 2323 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2328:3: error: template with C linkage 2328 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2334:3: error: template with C linkage 2334 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2343:3: error: template with C linkage 2343 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2357:3: error: template with C linkage 2357 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2364:5: error: template with C linkage 2364 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2369:5: error: template with C linkage 2369 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2373:3: error: template with C linkage 2373 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2383:5: error: template with C linkage 2383 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2388:5: error: template with C linkage 2388 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2392:3: error: template with C linkage 2392 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2402:5: error: template with C linkage 2402 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2407:5: error: template with C linkage 2407 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2411:3: error: template with C linkage 2411 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2421:5: error: template with C linkage 2421 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2426:5: error: template with C linkage 2426 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2430:3: error: template with C linkage 2430 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2437:3: error: template with C linkage 2437 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2440:3: error: template with C linkage 2440 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2452:3: error: template with C linkage 2452 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2455:3: error: template with C linkage 2455 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2471:3: error: template with C linkage 2471 | template> | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2477:3: error: template with C linkage 2477 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2483:3: error: template with C linkage 2483 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2489:3: error: template with C linkage 2489 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2495:3: error: template with C linkage 2495 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2504:5: error: template with C linkage 2504 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2509:5: error: template with C linkage 2509 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2513:3: error: template with C linkage 2513 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2521:3: error: template with C linkage 2521 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2534:3: error: template with C linkage 2534 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2580:3: error: template with C linkage 2580 | template class _Op, | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2598:3: error: template with C linkage 2598 | template class _Op, | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2603:3: error: template with C linkage 2603 | template class _Op, | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2624:3: error: template with C linkage 2624 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2627:3: error: template with C linkage 2627 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2630:3: error: template with C linkage 2630 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2633:3: error: template with C linkage 2633 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2637:3: error: template with C linkage 2637 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2642:3: error: template with C linkage 2642 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2647:3: error: template with C linkage 2647 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2657:3: error: template with C linkage 2657 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2669:7: error: template with C linkage 2669 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2679:7: error: template with C linkage 2679 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2684:7: error: template with C linkage 2684 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2690:3: error: template with C linkage 2690 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2697:3: error: template with C linkage 2697 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2704:3: error: template with C linkage 2704 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2709:3: error: template with C linkage 2709 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2837:3: error: template with C linkage 2837 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2852:3: error: template with C linkage 2852 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2879:3: error: template with C linkage 2879 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2884:3: error: template with C linkage 2884 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2892:3: error: template with C linkage 2892 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2899:3: error: template with C linkage 2899 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2906:3: error: template with C linkage 2906 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2912:3: error: template with C linkage 2912 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2918:3: error: template with C linkage 2918 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2925:3: error: template with C linkage 2925 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/glib-2.0/glib/gatomic.h:31, from /usr/include/glib-2.0/glib/gthread.h:32, from /usr/include/glib-2.0/glib/gasyncqueue.h:32, from /usr/include/glib-2.0/glib.h:32, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2930:3: error: template with C linkage 2930 | template | ^~~~~~~~ In file included from callback.cc:22: ../gconfmm/callback.h:25:1: note: 'extern "C"' linkage started here 25 | extern "C" | ^~~~~~~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from /usr/include/gconf/2/gconf/gconf-client.h:25, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/include/gconf/2/gconf/gconf-value.h:139:10: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 139 | GTime mod_time; /* time of the modification */ | ^~~~~~~~ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from /usr/include/gconf/2/gconf/gconf-client.h:25, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/include/gconf/2/gconf/gconf-value.h:144:62: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 144 | GTime gconf_meta_info_mod_time (GConfMetaInfo *gcmi); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ In file included from /usr/include/gconf/2/gconf/gconf-schema.h:26, from /usr/include/gconf/2/gconf/gconf.h:27, from /usr/include/gconf/2/gconf/gconf-client.h:25, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/include/gconf/2/gconf/gconf-value.h:153:69: warning: 'GTime' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations] 153 | GTime mod_time); | ^ In file included from /usr/include/glib-2.0/glib.h:43, from /usr/include/glib-2.0/gobject/gbinding.h:28, from /usr/include/glib-2.0/glib-object.h:22, from /usr/include/gconf/2/gconf/gconf-client.h:24, from ../gconfmm/callback.h:27, from callback.cc:22: /usr/include/glib-2.0/glib/gdate.h:48:17: note: declared here 48 | typedef gint32 GTime GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); | ^~~~~ make[2]: *** [Makefile:422: callback.lo] Error 1 make[2]: Leaving directory '/var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/work/gconfmm-2.28.3/gconf/gconfmm' make[1]: *** [Makefile:465: all-recursive] Error 1 make[1]: Leaving directory '/var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/work/gconfmm-2.28.3' make: *** [Makefile:318: all] Error 2 * ERROR: dev-cpp/gconfmm-2.28.3-r1::gentoo failed (compile phase): * emake failed * * If you need support, post the output of `emerge --info '=dev-cpp/gconfmm-2.28.3-r1::gentoo'`, * the complete build log and the output of `emerge -pqv '=dev-cpp/gconfmm-2.28.3-r1::gentoo'`. * The complete build log is located at '/var/log/portage/dev-cpp:gconfmm-2.28.3-r1:20210422-215930.log'. * For convenience, a symlink to the build log is located at '/var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/temp/build.log'. * The ebuild environment file is located at '/var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/temp/environment'. * Working directory: '/var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/work/gconfmm-2.28.3' * S: '/var/tmp/portage/dev-cpp/gconfmm-2.28.3-r1/work/gconfmm-2.28.3'