===> Building for libretro-gambatte-20200207
clang++  -pipe -Os  -O2 -DNDEBUG -fno-exceptions -fno-rtti -std=c++98 -DHAVE_STDINT_H -fPIC -mmacosx-version-min=10.1 -D__LIBRETRO__  -DHAVE_STDINT_H -DHAVE_INTTYPES_H -DINLINE=inline -DVIDEO_RGB565 -DHAVE_NETWORK  -Ilibgambatte/src -Ilibgambatte/src/../include -Ilibgambatte/src/../../common -Ilibgambatte/src/../../common/resample -Ilibgambatte/src/../libretro -Ilibgambatte/src/../libretro-common/include -c -olibgambatte/src/bootloader.o libgambatte/src/bootloader.cpp
clang: warning: include path for libstdc++ headers not found; pass '-stdlib=libc++' on the command line to use the libc++ standard library instead [-Wstdlibcxx-not-found]
libgambatte/src/bootloader.cpp:2:10: fatal error: 'cstring' file not found
#include <cstring>
         ^~~~~~~~~
1 error generated.
gmake: *** [Makefile.libretro:667: libgambatte/src/bootloader.o] Error 1
*** Error code 2

Stop.
bmake[1]: stopped making "all" in /Volumes/data/jenkins/workspace/pkgsrc-macos-trunk-x86_64/emulators/libretro-gambatte
*** Error code 1

Stop.
bmake: stopped making "all" in /Volumes/data/jenkins/workspace/pkgsrc-macos-trunk-x86_64/emulators/libretro-gambatte