gmp.h needs to detect bit width more dynamically to support universal builds on mac

[Marc Glisse]

On Thu, 5 Dec 2013, Dan Kegel wrote:

> Multilib seems to be arch and gentoo's name for what debian calls multiarch.
> Regardless of whether the system is using multilib, multiarch, or fat binaries,
> the same .h file needs to be usable for all architectures and all variants.

Just correcting this statement: in Debian/Ubuntu's version, we have 
/usr/include/$ARCH/gmp.h (I have 4 different $ARCH on this computer), the 
header doesn't need to be shared between architectures there.

-- 
Marc Glisse