https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81487
--- Comment #1 from Georg-Johann Lay <gjl at gcc dot gnu.org> --- FYI, the build compiler identifies as $ i686-w64-mingw32-gcc -v Using built-in specs. COLLECT_GCC=i686-w64-mingw32-gcc COLLECT_LTO_WRAPPER=/home/georg/bin/opt/mingw64-winpthreads-wildcard/mingw-w64-i686/bin/../libexec/gcc/i686-w64-mingw32/4.9.3/lto-wrapper Target: i686-w64-mingw32 Configured with: ../source/gcc-4.9.3/configure --build=x86_64-pc-linux-gnu --target=i686-w64-mingw32 --disable-shared --enable-static --disable-nls --disable-multilib --prefix=/opt/mingw64-winpthreads-wildcard/mingw-w64-i686 --with-sysroot=/opt/mingw64-winpthreads-wildcard/mingw-w64-i686 --with-mpc=/opt/mingw64-winpthreads-wildcard/pkgs/mpc/mpc-1.0.3-x86_64 --with-mpfr=/opt/mingw64-winpthreads-wildcard/pkgs/mpfr/mpfr-3.1.2-x86_64 --with-gmp=/opt/mingw64-winpthreads-wildcard/pkgs/gmp/gmp-6.0.0a-x86_64 --with-host-libstdcxx='-lstdc++ ' --with-cloog=/opt/mingw64-winpthreads-wildcard/pkgs/cloog/cloog-0.18.1-x86_64 --with-isl=/opt/mingw64-winpthreads-wildcard/pkgs/isl/isl-0.12.2-x86_64 --enable-languages=c,c++ --enable-threads=win32 --enable-fully-dynamic-string --enable-lto Thread model: win32 gcc version 4.9.3 (GCC) $ i686-w64-mingw32-gcc main.c -S -fverbose-asm && grep version main.s # GNU C (GCC) version 4.9.3 (i686-w64-mingw32) # compiled by GNU C version 4.4.5, GMP version 6.0.0, MPFR version 3.1.2, MPC version 1.0.3