net-nntp:pan-0.146:20210419-102318.log

net-nntp:pan-0.146:20210419-102318.log (text/plain), 255.00 KB, created by Toralf Förster on 2021-04-19 11:11:40 UTC

 * Package:    net-nntp/pan-0.146
 * Repository: gentoo
 * Maintainer: [e-mail]
 * USE:        abi_x86_64 amd64 dbus elibc_glibc kernel_linux libnotify spell ssl userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox splitdebug userpriv usersandbox

>>> Unpacking source...
>>> Unpacking pan-0.146.tar.bz2 to /var/tmp/portage/net-nntp/pan-0.146/work
>>> Source unpacked in /var/tmp/portage/net-nntp/pan-0.146/work
>>> Preparing source in /var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146 ...
 * Disabling deprecation warnings ...
 [ ok ]
 * Running elibtoolize in: pan-0.146/
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146 ...
 * econf: updating pan-0.146/config.sub with /usr/share/gnuconfig/config.sub
 * econf: updating pan-0.146/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 --docdir=/usr/share/doc/pan-0.146 --htmldir=/usr/share/doc/pan-0.146/html --libdir=/usr/lib64 --disable-maintainer-mode --with-yelp-tools --without-gtk3 --without-gmime30 --without-webkit --with-dbus --disable-gkr --with-gtkspell --enable-libnotify --with-gnutls
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 whether make supports nested variables... yes
checking whether UID '250' is supported by ustar format... yes
checking whether GID '250' is supported by ustar format... yes
checking how to create a ustar tar archive... gnutar
checking whether to enable maintainer-specific portions of Makefiles... no
checking whether make supports nested variables... (cached) 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 whether make supports the include directive... yes (GNU style)
checking dependency style of x86_64-pc-linux-gnu-g++... none
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 whether x86_64-pc-linux-gnu-gcc understands -c and -o together... yes
checking dependency style of x86_64-pc-linux-gnu-gcc... none
checking how to run the C preprocessor... x86_64-pc-linux-gnu-gcc -E
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for ANSI C header files... yes
checking whether time.h and sys/time.h may both be included... yes
checking for localtime_r... yes
checking for close... yes
checking for tr1/unordered_set... yes
checking whether the compiler implements namespaces... yes
checking whether the compiler has ext/hash_set... yes
checking for gawk... (cached) gawk
checking whether make sets $(MAKE)... (cached) yes
checking for x86_64-pc-linux-gnu-ranlib... x86_64-pc-linux-gnu-ranlib
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 errno.h usability... yes
checking errno.h presence... yes
checking for errno.h... yes
checking fcntl.h usability... yes
checking fcntl.h presence... yes
checking for fcntl.h... yes
checking for a sed that does not truncate output... /bin/sed
checking whether NLS is requested... yes
checking for msgfmt... /usr/bin/msgfmt
checking for gmsgfmt... /usr/bin/gmsgfmt
checking for xgettext... /usr/bin/xgettext
checking for msgmerge... /usr/bin/msgmerge
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
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 shared library run path origin... done
checking for CFPreferencesCopyAppValue... no
checking for CFLocaleCopyCurrent... no
checking for GNU gettext in libc... yes
checking whether to use NLS... yes
checking where the gettext function comes from... libc
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 ZLIB... yes
checking for x86_64-pc-linux-gnu-pkg-config... (cached) /usr/bin/x86_64-pc-linux-gnu-pkg-config
checking pkg-config is at least version 0.16... yes
checking for GLIB... yes
checking for GLIB - version >= 2.26.0... yes (version 2.68.0)
checking for GMIME... yes
checking for GTKSPELL... yes
checking for x86_64-pc-linux-gnu-pkg-config... (cached) /usr/bin/x86_64-pc-linux-gnu-pkg-config
checking pkg-config is at least version 0.7... yes
checking for GTK+ - version >= 2.16.0... yes (version 2.24.32)
checking for GNUTLS... yes
checking for LIBNOTIFY... yes
checking whether ln -s works... yes
checking for itstool... itstool
checking for xmllint... xmllint
checking for %l and %k support in strftime... yes
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating README.windows
config.status: creating uulib/Makefile
config.status: creating pan/Makefile
config.status: creating pan/general/Makefile
config.status: creating pan/usenet-utils/Makefile
config.status: creating pan/data/Makefile
config.status: creating pan/tasks/Makefile
config.status: creating pan/icons/Makefile
config.status: creating pan/data-impl/Makefile
config.status: creating pan/gui/Makefile
config.status: creating po/Makefile.in
config.status: creating help/Makefile
config.status: creating config.h
config.status: executing depfiles commands
config.status: executing po-directories commands
config.status: creating po/POTFILES
config.status: creating po/Makefile


Configuration:

        Prefix:                 /usr
        Source code location:   .
        Compiler:               x86_64-pc-linux-gnu-g++
        With D-Bus:             yes
        With GMime 3.0:         no
        With GMime crypto:      yes
        With GtkSpell:          yes
        With GTK+ 3:            no
        With WebKitGTK+:        no
        With GnuTLS:            yes (3.7.1)
        With libnotify:         yes
        With password storage:  no
        With yelp-tools:        yes
        With user manual:       no

>>> Source configured.
>>> Compiling source in /var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146 ...
make -j 1 
make  all-recursive
make[1]: Entering directory '/var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146'
Making all in .
make[2]: Entering directory '/var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146'
/usr/bin/msgfmt --xml --template pan.appdata.xml.in -d ./po -o pan.appdata.xml
/usr/bin/msgfmt --desktop --template pan.desktop.in -d ./po -o pan.desktop
make[2]: Leaving directory '/var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146'
Making all in uulib
make[2]: Entering directory '/var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146/uulib'
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I..  -I.. -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include   -DPROTOTYPES     -pipe -march=native -fno-diagnostics-color  -Og -g -c -o uulib.o uulib.c
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I..  -I.. -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include   -DPROTOTYPES     -pipe -march=native -fno-diagnostics-color  -Og -g -c -o uucheck.o uucheck.c
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I..  -I.. -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include   -DPROTOTYPES     -pipe -march=native -fno-diagnostics-color  -Og -g -c -o uunconc.o uunconc.c
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I..  -I.. -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include   -DPROTOTYPES     -pipe -march=native -fno-diagnostics-color  -Og -g -c -o uuutil.o uuutil.c
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I..  -I.. -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include   -DPROTOTYPES     -pipe -march=native -fno-diagnostics-color  -Og -g -c -o uuencode.o uuencode.c
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I..  -I.. -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include   -DPROTOTYPES     -pipe -march=native -fno-diagnostics-color  -Og -g -c -o uuscan.o uuscan.c
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I..  -I.. -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include   -DPROTOTYPES     -pipe -march=native -fno-diagnostics-color  -Og -g -c -o uustring.o uustring.c
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I..  -I.. -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include   -DPROTOTYPES     -pipe -march=native -fno-diagnostics-color  -Og -g -c -o fptools.o fptools.c
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I..  -I.. -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include   -DPROTOTYPES     -pipe -march=native -fno-diagnostics-color  -Og -g -c -o crc32.o crc32.c
rm -f libuu.a
ar cru libuu.a uulib.o uucheck.o uunconc.o uuutil.o uuencode.o uuscan.o uustring.o fptools.o crc32.o 
x86_64-pc-linux-gnu-ranlib libuu.a
make[2]: Leaving directory '/var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146/uulib'
Making all in pan
make[2]: Entering directory '/var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146/pan'
Making all in general
make[3]: Entering directory '/var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146/pan/general'
x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I. -I../..  -I../.. -I/usr/include/gmime-2.6 -D_LARGEFILE64_SOURCE -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/lib64/libffi/include -pthread -I/usr/include/libmount -I/usr/include/blkid  -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  -I/usr/include/gtk-2.0 -I/usr/lib64/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/lib64/libffi/include -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/uuid -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/libpng16 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/atk-1.0 -pthread    -pipe -march=native -fno-diagnostics-color  -Og -g -c -o debug.o debug.cc
x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I. -I../..  -I../.. -I/usr/include/gmime-2.6 -D_LARGEFILE64_SOURCE -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/lib64/libffi/include -pthread -I/usr/include/libmount -I/usr/include/blkid  -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  -I/usr/include/gtk-2.0 -I/usr/lib64/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/lib64/libffi/include -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/uuid -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/libpng16 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/atk-1.0 -pthread    -pipe -march=native -fno-diagnostics-color  -Og -g -c -o e-util.o e-util.cc
x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I. -I../..  -I../.. -I/usr/include/gmime-2.6 -D_LARGEFILE64_SOURCE -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/lib64/libffi/include -pthread -I/usr/include/libmount -I/usr/include/blkid  -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  -I/usr/include/gtk-2.0 -I/usr/lib64/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/lib64/libffi/include -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/uuid -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/libpng16 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/atk-1.0 -pthread    -pipe -march=native -fno-diagnostics-color  -Og -g -c -o file-util.o file-util.cc
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, _Tp __v>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, _Tp __v>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<bool __v>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<bool, typename, typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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 <typename _Type>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename...>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _B1>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _B1, typename _B2>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _B1, typename _B2, typename _B3, typename... _Bn>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename...>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _B1>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _B1, typename _B2>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _B1, typename _B2, typename _B3, typename... _Bn>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Pp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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 <typename _Tp, size_t = sizeof(_Tp)>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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 <typename _TypeIdentity,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:219:3: error: template with C linkage
  219 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:327:3: error: template specialization with C linkage
  327 |   template<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:331:3: error: template specialization with C linkage
  331 |   template<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:386:3: error: template specialization with C linkage
  386 |   template<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, std::size_t _Size>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Cp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Cp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Cp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename, typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename... _Types>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename...> using __void_t = void;
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename = void>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:728:3: error: template with C linkage
  728 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:745:3: error: template with C linkage
  745 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up = _Tp&&>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename, unsigned = 0>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename = decltype(declval<_Tp&>().~_Tp())>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:825:3: error: template with C linkage
  825 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:876:3: error: template with C linkage
  876 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<bool, typename _Tp, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Arg>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, size_t _Num>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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 <typename _Tp>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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 <typename _Tp>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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 <typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, std::size_t _Size>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename, unsigned _Uint>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, unsigned _Uint, std::size_t _Size>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, unsigned _Uint>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Base, typename _Derived>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _From, typename _To,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1425:3: error: template with C linkage
 1425 |   template<typename _From, typename _To>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _From, typename _To>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _ToElementType, typename _FromElementType>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _From, typename _To,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1465:3: error: template with C linkage
 1465 |   template<typename _From, typename _To>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _From, typename _To>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1565:3: error: template with C linkage
 1565 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1569:3: error: template with C linkage
 1569 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1573:3: error: template with C linkage
 1573 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1577:3: error: template with C linkage
 1577 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1581:3: error: template with C linkage
 1581 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1585:3: error: template with C linkage
 1585 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __is_referenceable<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1634:3: error: template with C linkage
 1634 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1638:3: error: template with C linkage
 1638 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1642:3: error: template with C linkage
 1642 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Unqualified, bool _IsConst, bool _IsVol>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Unqualified>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Unqualified>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Unqualified>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Unqualified>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Qualified, typename _Unqualified,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1680:3: error: template with C linkage
 1680 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1709:3: error: template specialization with C linkage
 1709 |   template<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1735:3: error: template with C linkage
 1735 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename...> struct _List { };
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename... _Up>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<size_t _Sz, typename _Tp, bool = (_Sz <= _Tp::__size)>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<size_t _Sz, typename _Uint, typename... _UInts>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<size_t _Sz, typename _Uint, typename... _UInts>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1863:3: error: template specialization with C linkage
 1863 |   template<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1889:3: error: template with C linkage
 1889 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1960:3: error: template with C linkage
 1960 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1964:3: error: template with C linkage
 1964 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, std::size_t _Size>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, std::size_t _Size>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:1998:3: error: template with C linkage
 1998 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2002:3: error: template with C linkage
 2002 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = __or_<__is_referenceable<_Tp>,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2039:3: error: template with C linkage
 2039 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2043:3: error: template with C linkage
 2043 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<std::size_t _Len>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<std::size_t _Len, std::size_t _Align =
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2078:3: error: template with C linkage
 2078 |   template <typename... _Types>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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 <typename _Tp, typename... _Types>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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 <size_t _Len, typename... _Types>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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 <size_t _Len, typename... _Types>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Up,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2133:3: error: template with C linkage
 2133 |   template<typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<bool, typename _Tp = void>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<bool _Cond, typename _Tp = void>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename... _Cond>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<bool _Cond, typename _Iftrue, typename _Iffalse>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Iftrue, typename _Iffalse>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename... _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename, typename>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp0>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp1, typename _Tp2,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2269:3: error: template with C linkage
 2269 |   template<typename _Tp1, typename _Tp2>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp1, typename _Tp2>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename...>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename, typename, typename = void>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp1, typename _Tp2, typename... _Rp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _CTp, typename... _Rp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _CTp, typename _Rp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, bool = is_enum<_Tp>::value>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Signature>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Tag>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fp, typename _Tp1, typename... _Args>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename...>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _MemPtr, typename _Arg, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fp, typename _Tp1, typename... _Args>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename...>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _MemPtr, typename _Arg, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fp, typename _Tp1>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename, typename>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _MemPtr, typename _Arg>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fp, typename _Tp1>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename, typename>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _MemPtr, typename _Arg>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _MemPtr, typename _Arg>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Res, typename _Class, typename _Arg>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _MemPtr, typename _Arg, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Res, typename _Class, typename _Arg, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up = __remove_cvref_t<_Tp>>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<bool, bool, typename _Functor, typename... _ArgTypes>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _MemPtr, typename _Arg>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _MemPtr, typename _Arg, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fn, typename... _Args>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename...>
      |     ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Functor, typename... _ArgTypes>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Functor, typename... _ArgTypes>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Functor, typename... _ArgTypes>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2541:3: error: template with C linkage
 2541 |   template<size_t _Len, size_t _Align =
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2545:3: error: template with C linkage
 2545 |   template <size_t _Len, typename... _Types>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2549:3: error: template with C linkage
 2549 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2553:3: error: template with C linkage
 2553 |   template<bool _Cond, typename _Tp = void>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2557:3: error: template with C linkage
 2557 |   template<bool _Cond, typename _Iftrue, typename _Iffalse>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2561:3: error: template with C linkage
 2561 |   template<typename... _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2565:3: error: template with C linkage
 2565 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2569:3: error: template with C linkage
 2569 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2576:3: error: template with C linkage
 2576 |   template<typename...> using void_t = void;
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Default, typename _AlwaysVoid,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2589:3: error: template with C linkage
 2589 |   template<typename _Default, template<typename...> class _Op,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Default, template<typename...> class _Op,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Default, template<typename...> class _Op,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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 <typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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 <typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename... _Elements>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename... _Tps>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, size_t _Nm>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp, typename
      |       ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2673:7: error: template with C linkage
 2673 |       template<typename>
      |       ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |       ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename>
      |       ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2719:3: error: template with C linkage
 2719 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2728:3: error: template with C linkage
 2728 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2738:3: error: template with C linkage
 2738 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2743:3: error: template with C linkage
 2743 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2753:7: error: template with C linkage
 2753 |       template<typename _Tp, typename _Up, typename
      |       ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2759:7: error: template with C linkage
 2759 |       template<typename, typename>
      |       ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2765:7: error: template with C linkage
 2765 |       template<typename _Tp, typename _Up>
      |       ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2772:7: error: template with C linkage
 2772 |       template<typename, typename>
      |       ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2778:3: error: template with C linkage
 2778 |   template<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2786:3: error: template with C linkage
 2786 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2793:3: error: template with C linkage
 2793 |   template<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2801:3: error: template with C linkage
 2801 |   template<typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2809:3: error: template with C linkage
 2809 |   template<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2815:3: error: template with C linkage
 2815 |   template<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2822:3: error: template with C linkage
 2822 |   template<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2827:3: error: template with C linkage
 2827 |   template<typename _Tp, typename _Up>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Result, typename _Ret,
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10/type_traits:2842:3: error: template with C linkage
 2842 |   template<typename _Result, typename _Ret>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Result, typename _Ret>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fn, typename... _ArgTypes>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fn, typename _Tp, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fn, typename _Tp, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fn, typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fn, typename _Tp>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fn, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Result, typename _Fn, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fn, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from file-util.cc:30:
/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<typename _Fn, typename... _Args>
      |   ^~~~~~~~
file-util.cc:25:1: note: ‘extern "C"’ linkage started here
   25 | extern "C"
      | ^~~~~~~~~~
make[3]: *** [Makefile:461: file-util.o] Error 1
make[3]: Leaving directory '/var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146/pan/general'
make[2]: *** [Makefile:391: all-recursive] Error 1
make[2]: Leaving directory '/var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146/pan'
make[1]: *** [Makefile:592: all-recursive] Error 1
make[1]: Leaving directory '/var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146'
make: *** [Makefile:446: all] Error 2
 * ERROR: net-nntp/pan-0.146::gentoo failed (compile phase):
 *   emake failed
 * 
 * If you need support, post the output of `emerge --info '=net-nntp/pan-0.146::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=net-nntp/pan-0.146::gentoo'`.
 * The complete build log is located at '/var/log/portage/net-nntp:pan-0.146:20210419-102318.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/net-nntp/pan-0.146/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/net-nntp/pan-0.146/temp/environment'.
 * Working directory: '/var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146'
 * S: '/var/tmp/portage/net-nntp/pan-0.146/work/pan-0.146'