https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78380
--- Comment #4 from Mario Baumann <mario-baumann at web dot de> --- Hi, have a similar problem with /Gcc/6.3.0/bin/gcc -c foo.c -m32 -mfpmath=sse > /Gcc/6.3.0/bin/gcc -v Using built-in specs. COLLECT_GCC=/Gcc/6.3.0/bin/gcc COLLECT_LTO_WRAPPER=/Gcc/6.3.0/libexec/gcc/x86_64-apple-darwin16/6.3.0/lto-wrapper Target: x86_64-apple-darwin16 Configured with: /Build/zulu/gcc/6.3.0-src/configure --prefix=/Gcc/6.3.0 --build=x86_64-apple-darwin16 --enable-languages=c,c++,fortran --enable-lto --enable-stage1-checking --enable-libstdcxx-time --disable-nls --disable-libquadmath --disable-libquadmath-support --with-ld=/opt/local/bin/ld --with-ar=/opt/local/bin/ar --with-as=/opt/local/bin/as --with-system-zlib Thread model: posix gcc version 6.3.0 (GCC)