-fno-math-errno by default

[Gerald Pfeifer]

On Sun, 6 Feb 2011, David Schultz wrote:
> That is correct.  Basically nobody sets errno in the math library
> anymore, except for compatibility with old apps written for the
> System V math library.  BSD never has and never will.  IEEE 754
> floating point exception flags are much saner and faster.

Thanks for the confirmation, David!

> I submitted a change request to gcc about 2.5 years ago:
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37073

Uh, that's not good.  That is, you did the right thing, just Loren as
the upstream FreeBSD maintainer must have missed it somehow.  

I'll see what I can do about it.  (I also checked, and this plus
the one on -mfancy-math-387 are the only open issues from someone
@freebsd.org.)

Gerald