* Package:    dev-cpp/catch-2.1.0
 * Repository: gentoo
 * Maintainer: mgorny@gentoo.org
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux test userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox test userpriv usersandbox
>>> Unpacking source...
>>> Unpacking Catch2-2.1.0.tar.gz to /var/tmp/portage/dev-cpp/catch-2.1.0/work
>>> Source unpacked in /var/tmp/portage/dev-cpp/catch-2.1.0/work
>>> Preparing source in /var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0 ...
>>> Working in BUILD_DIR: "/var/tmp/portage/dev-cpp/catch-2.1.0/work/catch-2.1.0_build"
cmake -C /var/tmp/portage/dev-cpp/catch-2.1.0/work/catch-2.1.0_build/gentoo_common_config.cmake -G Unix Makefiles -DCMAKE_INSTALL_PREFIX=/usr -DNO_SELFTEST=no -DCMAKE_BUILD_TYPE=Gentoo -DCMAKE_USER_MAKE_RULES_OVERRIDE=/var/tmp/portage/dev-cpp/catch-2.1.0/work/catch-2.1.0_build/gentoo_rules.cmake -DCMAKE_TOOLCHAIN_FILE=/var/tmp/portage/dev-cpp/catch-2.1.0/work/catch-2.1.0_build/gentoo_toolchain.cmake  /var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0
loading initial cache file /var/tmp/portage/dev-cpp/catch-2.1.0/work/catch-2.1.0_build/gentoo_common_config.cmake
-- The C compiler identification is GNU 7.2.0
-- The CXX compiler identification is GNU 7.2.0
-- Check for working C compiler: /usr/bin/x86_64-pc-linux-gnu-gcc
-- Check for working C compiler: /usr/bin/x86_64-pc-linux-gnu-gcc -- works
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-- Detecting CXX compiler ABI info
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-- Enabling C++11
-- <<< Gentoo configuration >>>
Build type      Gentoo
Install path    /usr
Compiler flags:
C               -O2 -pipe -march=native -Wall
C++             -O2 -pipe -march=native
Linker flags:
Executable      -Wl,-O1 -Wl,--as-needed
Module          -Wl,-O1 -Wl,--as-needed
Shared          -Wl,-O1 -Wl,--as-needed

-- Configuring done
-- Generating done
-- Build files have been written to: /var/tmp/portage/dev-cpp/catch-2.1.0/work/catch-2.1.0_build
>>> Source configured.
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/usr/bin/x86_64-pc-linux-gnu-g++  -I/var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0/include   -DNDEBUG -O2 -pipe -march=native   -Wall -Wextra -Wunreachable-code -Werror -std=c++11 -o CMakeFiles/SelfTest.dir/include/internal/catch_capture_matchers.cpp.o -c /var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0/include/internal/catch_capture_matchers.cpp
[ 32%] Building CXX object CMakeFiles/SelfTest.dir/include/internal/catch_commandline.cpp.o
/usr/bin/x86_64-pc-linux-gnu-g++  -I/var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0/include   -DNDEBUG -O2 -pipe -march=native   -Wall -Wextra -Wunreachable-code -Werror -std=c++11 -o CMakeFiles/SelfTest.dir/include/internal/catch_commandline.cpp.o -c /var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0/include/internal/catch_commandline.cpp
/var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0/include/internal/catch_commandline.cpp: In member function ‘Catch::clara::detail::ParserResult Catch::clara::detail::BoundLambda<L>::setValue(const string&) [with L = Catch::makeCommandLineParser(Catch::ConfigData&)::<lambda(bool)>]’:
/var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0/include/internal/catch_commandline.cpp:138:67: error: ‘temp’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
             | Opt( [&]( bool flag ) { config.showDurations = flag ? ShowDurations::Always : ShowDurations::Never; }, "yes|no" )
                                                              ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0/include/internal/catch_clara.h:26:0,
                 from /var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0/include/internal/catch_commandline.h:12,
                 from /var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0/include/internal/catch_commandline.cpp:9:
/var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0/include/internal/../external/clara.hpp:751:17: note: ‘temp’ was declared here
         ArgType temp;
                 ^~~~
cc1plus: all warnings being treated as errors
make[2]: *** [CMakeFiles/SelfTest.dir/build.make:807: CMakeFiles/SelfTest.dir/include/internal/catch_commandline.cpp.o] Error 1
make[2]: Leaving directory '/var/tmp/portage/dev-cpp/catch-2.1.0/work/catch-2.1.0_build'
make[1]: *** [CMakeFiles/Makefile2:612: CMakeFiles/SelfTest.dir/all] Error 2
make[1]: Leaving directory '/var/tmp/portage/dev-cpp/catch-2.1.0/work/catch-2.1.0_build'
make: *** [Makefile:141: all] Error 2
 * ERROR: dev-cpp/catch-2.1.0::gentoo failed (compile phase):
 *   emake failed
 * 
 * If you need support, post the output of `emerge --info '=dev-cpp/catch-2.1.0::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-cpp/catch-2.1.0::gentoo'`.
 * The complete build log is located at '/var/log/portage/dev-cpp:catch-2.1.0:20180112-114225.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/dev-cpp/catch-2.1.0/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-cpp/catch-2.1.0/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-cpp/catch-2.1.0/work/catch-2.1.0_build'
 * S: '/var/tmp/portage/dev-cpp/catch-2.1.0/work/Catch2-2.1.0'