Thread: Why is #pragma STDC FENV_ACCESS ignored ?

i'm using gcc 4.4.5 , c code. i'm compiling sse floating point options x86, turned on.

find gcc not recognize stdc fenv_access pragma defined in c99.

find feenableexcept() function links in glibc has no prototype in fenv.h -- _gnu_source defined. function not part of c99 commonly referenced on web , has linux man page.

want trap floating point exceptions because sse turned on integer divide 0 exceptions (such x = 1 % 0) appear floating point exceptions (i think doesn't happen if x87 used).

there "clean" way of dealing this? found link @ least assures me i'm on right track:
http://www.fortran-2000.com/arnaudre...ks.html#x86_fp

what value of -std compiling with? fenv.h:

code:

#ifdef __use_gnu  /* enable individual exceptions.  not enable more exceptions    excepts specifies.  returns previous enabled exceptions if    exceptions set, otherwise returns -1.  */ extern int feenableexcept (int __excepts) __throw;

so try -std=gnu99.

Forum The Ubuntu Forum Community Ubuntu Specialised Support Development & Programming Programming Talk [SOLVED] Why is #pragma STDC FENV_ACCESS ignored ?

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