http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57848
--- Comment #19 from Dongsheng Song <dongsheng.song at gmail dot com> --- When I use this 64 bit gcc 4.9 cross compiler to generate the native compiler, I got the error: In file included from /home/cauchy/cross/x86_64-windows-gcc49/lib/gcc/x86_64-w64-mingw32/4.9.0/include/x86intrin.h:27:0, from /home/cauchy/cross/x86_64-windows-gcc49/x86_64-w64-mingw32/include/winnt.h:1495, from /home/cauchy/cross/x86_64-windows-gcc49/x86_64-w64-mingw32/include/minwindef.h:146, from /home/cauchy/cross/x86_64-windows-gcc49/x86_64-w64-mingw32/include/windef.h:8, from /home/cauchy/cross/x86_64-windows-gcc49/x86_64-w64-mingw32/include/windows.h:69, from /home/cauchy/vcs/svn/gcc/trunk/gcc/config/i386/host-mingw32.c:29: /home/cauchy/cross/x86_64-windows-gcc49/lib/gcc/x86_64-w64-mingw32/4.9.0/include/ia32intrin.h:54:28: sorry, unimplemented: -mno-fentry isn't compatible with SEH #pragma GCC target("sse4.2") ^ make[2]: *** [host-mingw32.o] Error 1 make[2]: Leaving directory `/home/cauchy/obj/native/gcc-4.9-win64/gcc/gcc' make[1]: *** [all-gcc] Error 2 make[1]: Leaving directory `/home/cauchy/obj/native/gcc-4.9-win64/gcc' make: *** [all] Error 2 The full error log file in the attachment 30835.