* Package:    games-arcade/retrobattle-1.0.0
 * Repository: gentoo
 * Maintainer: games@gentoo.org
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux userland_GNU
 * FEATURES:   preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
>>> Unpacking retrobattle-src-1.0.0.tar.bz2 to /var/tmp/portage/games-arcade/retrobattle-1.0.0/work
>>> Source unpacked in /var/tmp/portage/games-arcade/retrobattle-1.0.0/work
>>> Preparing source in /var/tmp/portage/games-arcade/retrobattle-1.0.0/work/retrobattle-src-1.0.0/src ...
 * Applying retrobattle-1.0.0-build.patch ...
 [ ok ]
 * Applying retrobattle-1.0.0-sound.patch ...
 [ ok ]
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/games-arcade/retrobattle-1.0.0/work/retrobattle-src-1.0.0/src ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/games-arcade/retrobattle-1.0.0/work/retrobattle-src-1.0.0/src ...
make -j1 
x86_64-pc-linux-gnu-g++ -Werror=terminate -O2 -pipe -march=native -I/usr/include/SDL -D_GNU_SOURCE=1 -D_REENTRANT -I.  -DENABLE_BINRELOC  -c -o retro.o retro.cc
In file included from retro.cc:24:0:
GameLogic.h:55:45: error: ‘constexpr’ needed for in-class initialization of static data member ‘const float GameLogic::updateInterval’ of non-integral type [-fpermissive]
   static const float updateInterval = 1.0 / maximumFrameRate;
                                             ^~~~~~~~~~~~~~~~
GameLogic.h:56:61: error: ‘constexpr’ needed for in-class initialization of static data member ‘const float GameLogic::maxCyclesPerFrame’ of non-integral type [-fpermissive]
   static const float maxCyclesPerFrame = maximumFrameRate / minimumFrameRate;
                                                             ^~~~~~~~~~~~~~~~
make: *** [<builtin>: retro.o] Error 1
 * ERROR: games-arcade/retrobattle-1.0.0::gentoo failed (compile phase):
 *   emake failed
 * 
 * If you need support, post the output of `emerge --info '=games-arcade/retrobattle-1.0.0::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=games-arcade/retrobattle-1.0.0::gentoo'`.
 * The complete build log is located at '/var/log/portage/games-arcade:retrobattle-1.0.0:20170331-233133.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/games-arcade/retrobattle-1.0.0/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/games-arcade/retrobattle-1.0.0/temp/environment'.
 * Working directory: '/var/tmp/portage/games-arcade/retrobattle-1.0.0/work/retrobattle-src-1.0.0/src'
 * S: '/var/tmp/portage/games-arcade/retrobattle-1.0.0/work/retrobattle-src-1.0.0/src'