Can't build gmp 4.2.1 on Solaris 10/Intel

[Skip Montanaro]

Based on a hint on comp.lang.python (my eventual target was installation of
gmpy), this worked for me:

CFLAGS="" CC=gcc ./configure
gmake
gmake check

I have no idea why explicitly setting CFLAGS and CC or using "gmake" instead
of "make" worked, but they did.  "make" and "gmake" both run GNU make 3.80
and our usual compiler is gcc 3.4.

At any rate, I'm off to the races.  Thanks for the feedback.

Skip