[Bug c++/63262] [4.9.2] ICE including math.h on darwin

[fxcoudert at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63262

Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|---                         |INVALID

--- Comment #18 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #17)
> The existence of the popcntq instruction suggests your libgmp has been
> configured for Nehalem or later CPU, which you apparently don't have.
> So, either convince whoever built it to configure it for earlier CPUs, or
> build it on your own.  In any case, this doesn't sound like a GCC bug in any
> way.

Thanks Jakub, I had missed that. It's actually much simpler. Karsten, you need
to ask Gaurav to build his GMP/MPFR/MPC libraries with an explicit build
parameter:

./configure --build=x86_64-apple-darwin14.0.0

(for Yosemite). Otherwise, the GMP library is not portable. And if I recall
correctly, MPFR and MPC use the GMP settings for their own compilation.