Re: [gfortran,patch] -ffpe-trap library support for SysV

[FX Coudert <fxcoudert at gmail dot com>]

> OK.  I looked at your patch.  I'll test and review it more formally
> on Saturday.

Thanks. It will still enable this functionnality solaris, (open|net)bsd, 
hpux and irix; that's a lot!

> > As for fenv (it's already been discussed here), there's no C99 way to
> > raise FPE on individually selected exceptions.
>
> Huh?  feraiseexcept(FE_OVEFLOW) will raise an overflow exception.
> You can do the same with FE_INVALID, FE_DIVBYZERO, FE_INEXACT, 
> and FE_UNDERFLOW.

What I wanted to say is: there's no C99 way to ask for a FPE to be 
raised on individually selected exceptions. That is, there is no C99 way 
to do:

  float x;
  raise_fpe_on_ieee_exception(EXCEPTION_INVALID);
  x = -2;
  x = sqrt(x); // This raises a FPE

--
FX