* Package:    sys-apps/proot-5.1.0-r2
 * Repository: gentoo
 * Maintainer: pinkbyte@gentoo.org
 * Upstream:   proot_me@googlegroups.com
 * USE:        abi_x86_64 amd64 elibc_musl kernel_linux userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
>>> Unpacking proot-5.1.0.tar.gz to /var/tmp/portage/sys-apps/proot-5.1.0-r2/work
>>> Source unpacked in /var/tmp/portage/sys-apps/proot-5.1.0-r2/work
>>> Preparing source in /var/tmp/portage/sys-apps/proot-5.1.0-r2/work/PRoot-5.1.0 ...
 * Applying proot-5.1.0-makefile.patch ...
 [ ok ]
 * Applying proot-2.3.1-lib-paths-fix.patch ...
 [ ok ]
 * Applying proot-5.1.0-loader.patch ...
 [ ok ]
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/sys-apps/proot-5.1.0-r2/work/PRoot-5.1.0 ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/sys-apps/proot-5.1.0-r2/work/PRoot-5.1.0 ...
make -j1 -C src V=1 CC=x86_64-gentoo-linux-musl-gcc CHECK_VERSION=true CAREBUILDENV=ok proot 
make: Entering directory '/var/tmp/portage/sys-apps/proot-5.1.0-r2/work/PRoot-5.1.0/src'
if [ -e .check_process_vm ]; then echo "#define HAVE_PROCESS_VM" > .check_process_vm.res; else echo "" > .check_process_vm.res; fi
if [ -e .check_seccomp_filter ]; then echo "#define HAVE_SECCOMP_FILTER" > .check_seccomp_filter.res; else echo "" > .check_seccomp_filter.res; fi
echo "/* This file is auto-generated, edit at your own risk.  */" > build.h
echo "#ifndef BUILD_H"      >> build.h
echo "#define BUILD_H"      >> build.h
sh -c 'true'    >> build.h
cat .check_process_vm.res .check_seccomp_filter.res                      >> build.h
echo "#endif /* BUILD_H */" >> build.h
x86_64-gentoo-linux-musl-gcc -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -I. -I./ -O2 -pipe -march=native -Wall -Wextra -MD -c ./cli/cli.c -o cli/cli.o
./cli/cli.c:33:10: fatal error: execinfo.h: No such file or directory
   33 | #include <execinfo.h>      /* backtrace_symbols(3), */
      |          ^~~~~~~~~~~~
compilation terminated.
make: *** [GNUmakefile:163: cli/cli.o] Error 1
rm .check_seccomp_filter.o .check_process_vm.o .check_seccomp_filter .check_process_vm
make: Leaving directory '/var/tmp/portage/sys-apps/proot-5.1.0-r2/work/PRoot-5.1.0/src'
 * ERROR: sys-apps/proot-5.1.0-r2::gentoo failed (compile phase):
 *   emake failed
 * 
 * If you need support, post the output of `emerge --info '=sys-apps/proot-5.1.0-r2::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=sys-apps/proot-5.1.0-r2::gentoo'`.
 * The complete build log is located at '/var/log/portage/sys-apps:proot-5.1.0-r2:20200409-161016.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/sys-apps/proot-5.1.0-r2/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-apps/proot-5.1.0-r2/temp/environment'.
 * Working directory: '/var/tmp/portage/sys-apps/proot-5.1.0-r2/work/PRoot-5.1.0'
 * S: '/var/tmp/portage/sys-apps/proot-5.1.0-r2/work/PRoot-5.1.0'