Re: [Mingw-users] list of MinGW-GCC Optimization options? (crash-problem with -O2)

[Vasili B. <vas...@gm...>]

Hans Henrik Bergan wrote:
> i have a problem with compiling a program with -O2
> when i do this, the program crash when started..

-O2 also enables strict aliasing. Try to set -fno-strict-aliasing to 
disable is or -Wstrict-aliasing to see strict aliasing warnings.

Strict aliasing is very good for optimization, but if your program 
breaks it, incorrect code silently will be produced.