Hi, all

     It seems that gcc's auto-omit-frame-pointer has other problems.

     The example is from mingw bug tracker: 
http://sourceforge.net/tracker/?func=detail&aid=3426555&group_id=2435&atid=102435

     g++ -O3 main.cpp       running will crash.
     g++ -O2 main.cpp       running no crash.
     g++ -O3 -fno-omit-frame-pointer    running no crash.

     I don't know in the end which optimize option defaultly contains 
this switch "-fomit-frame-pointer" on i686-pc-mingw32 or x86_64-w64-mingw32?

-- 
Best Regards,
xunxun