[PATCH] Fix libgfortran compilation on Tru64

[François-Xavier Coudert]

>> 2005-12-20  Roger Sayle  <roger@eyesopen.com>
>>
>>       * intrinsics/c99_functions.c: Add function prototypes to avoid
>>       warnings from -Wstrict-prototypes -Wmissing-prototypes.  On Tru64
>>       work around a brain-dead libm by redirecting calls to cabs{,f,l}
>>       to a local __gfc_cabs{,f,l}.
>
> http://gcc.gnu.org/ml/gcc-patches/2005-12/msg01578.html
> Ping?  This fixes libgfortran's contribution to the broken
> bootstrap on Tru64.  As it's been christmas, I've left it
> well over a week before pinging.

Once updated to the current tree, this is OK to commit to mainline
(and 4.1 after a few days). Please post here the final version you
commit.

NB: the same problem with cabs arises for mips-sgi-irix6.5 (that's PR
22097). If someone with knowledge of Irix wants to comment on that
and/or add the Irix case, you're more than welcome.

FX