compilation with -mno-cygwin

Tue Apr 13 17:29:00 GMT 2004

Hans Horn wrote:
>I light of the recent gcc performance comparison, I tried to compile a
>number crunching application (for which I have noticed a significant
>performance degradation of a factor 2-3 since the days of gcc2.9.x) using
>the -mno-cygwin flag.
>I get a shitload of crap like the following :
>>g++ -c -mno-cygwin -ansi -DGCC3X -DLINUX -DINLINE=inline -fno-default-inline
> -W -Wno-deprecated -fomit-frame-pointer -ffast-math -mcpu=pentium4 -march=p
>entium4 -mfpmath=sse -O2 -I./ -o xyz.o xyz.cpp
>><snip>
For a start, you shouldn't treat -mno-cygwin like linux (-DLINUX). 
-mno-cygwin turns g++ into a "pure" windows C++ compiler (hence the name 
of the flag).
-mno-cygwin should end up with files identical(ish) to those obtained by 
mingw I think.. what compile line did you use for that?
Chris
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