http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56597
--- Comment #3 from jjwang <kruglinski at gmail dot com> 2013-03-12 13:24:15 UTC --- (In reply to comment #2) > "but when I try to run a test program compiled by VC++ that use the Dlls > compiled by gcc" > > so I assume this is on mingw32/64. Which means that whatever ABI is > in effect is either violated by VC++ or by GCC. > > CCing win target maintainers. Please resolve whether this is a GCC or > a VC++ bug. This problem are very clear, mingw/gcc 4.7.2 generate implicit SSE2 instructions that require alignment and gcc just leave everything as it is, then VC++ does not aligns the program's stack and call to the DLLs(shared library in windows) produced by GCC, finally the program crashed! In my view I think even VC++ does not aligns the stack, the function exported by a DLL that compiled by GCC should self-aligned not just leave things as it is, Specifically when GCC decide to use the vector instructions that require alignment(just like SSE2), and users never realized it! I think the bottom line is "program can't just crashed!" ps: follow Jakub Jelinek's says I add "-mstackrealign" option, the issue is gone, so Strictly speaking it can't be a bug, just a Potential issue. regards 03-12-2013 jjwang
