https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63810
--- Comment #6 from howarth at bromo dot med.uc.edu --- The proposed patch for gcc trunk fails to build here against r217590 /sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/./prev-gcc/xg++ -B/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/./prev-gcc/ -B/sw/lib/gcc5.0/x86_64-apple-darwin14.0.0/bin/ -nostdinc++ -B/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/prev-x86_64-apple-darwin14.0.0/libstdc++-v3/src/.libs -B/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/prev-x86_64-apple-darwin14.0.0/libstdc++-v3/libsupc++/.libs -I/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/prev-x86_64-apple-darwin14.0.0/libstdc++-v3/include/x86_64-apple-darwin14.0.0 -I/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/prev-x86_64-apple-darwin14.0.0/libstdc++-v3/include -I/sw/src/fink.build/gcc50-5.0.0-1000/gcc-5-20141114/libstdc++-v3/libsupc++ -L/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/prev-x86_64-apple-darwin14.0.0/libstdc++-v3/src/.libs -L/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/prev-x86_64-apple-darwin14.0.0/libstdc++-v3/libsupc++/.libs -c -DIN_GCC_FRONTEND -DIN_GCC_FRONTEND -DIN_GCC_FRONTEND -g -O2 -gtoggle -DIN_GCC -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common -DHAVE_CONFIG_H -I. -I. -I../../gcc-5-20141114/gcc -I../../gcc-5-20141114/gcc/. -I../../gcc-5-20141114/gcc/../include -I../../gcc-5-20141114/gcc/../libcpp/include -I/sw/include -I/sw/include -I../../gcc-5-20141114/gcc/../libdecnumber -I../../gcc-5-20141114/gcc/../libdecnumber/dpd -I../libdecnumber -I../../gcc-5-20141114/gcc/../libbacktrace -DCLOOG_INT_GMP -I/sw/include -I/sw/include -o darwin-c.o -MT darwin-c.o -MMD -MP -MF ./.deps/darwin-c.TPo -DGCC_INCLUDE_DIR=\"/sw/lib/gcc5.0/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/include\" -DFIXED_INCLUDE_DIR=\"/sw/lib/gcc5.0/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/include-fixed\" -DGPLUSPLUS_INCLUDE_DIR=\"/sw/lib/gcc5.0/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../include/c++/5.0.0\" -DGPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT=0 -DGPLUSPLUS_TOOL_INCLUDE_DIR=\"/sw/lib/gcc5.0/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../include/c++/5.0.0/x86_64-apple-darwin14.0.0\" -DGPLUSPLUS_BACKWARD_INCLUDE_DIR=\"/sw/lib/gcc5.0/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../include/c++/5.0.0/backward\" -DLOCAL_INCLUDE_DIR=\"/usr/local/include\" -DCROSS_INCLUDE_DIR=\"/sw/lib/gcc5.0/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../x86_64-apple-darwin14.0.0/sys-include\" -DTOOL_INCLUDE_DIR=\"/sw/lib/gcc5.0/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../x86_64-apple-darwin14.0.0/include\" -DNATIVE_SYSTEM_HEADER_DIR=\"/usr/include\" -DPREFIX=\"/sw/lib/gcc5.0/\" -DSTANDARD_EXEC_PREFIX=\"/sw/lib/gcc5.0/lib/gcc/\" ../../gcc-5-20141114/gcc/config/darwin-c.c ../../gcc-5-20141114/gcc/config/darwin-c.c: In function ‘const char* version_as_modern_macro(const long unsigned int*)’: ../../gcc-5-20141114/gcc/config/darwin-c.c:711:7: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare] != ((major > 9) ? sizeof "999999" : sizeof "99999") - 1) ^ cc1plus: all warnings being treated as errors ../../gcc-5-20141114/gcc/config/t-darwin:26: recipe for target 'darwin-c.o' failed make[3]: *** [darwin-c.o] Error 1 make[3]: Leaving directory '/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/gcc' Makefile:4368: recipe for target 'all-stage2-gcc' failed make[2]: *** [all-stage2-gcc] Error 2 make[2]: Leaving directory '/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir' Makefile:20616: recipe for target 'stage2-bubble' failed make[1]: *** [stage2-bubble] Error 2 make[1]: Leaving directory '/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir' Makefile:906: recipe for target 'all' failed make: *** [all] Error 2