$summary, configure script by default will use "gcc" vs the symlink. See patch. I can apply if you like, just wanted to run it by you guys.
Created attachment 201046 [details, diff] toolchain-funcs
there is no need to set CXX, and you dont need to pass it as an argument to configure http://sources.gentoo.org/dev-libs/gmp/gmp-4.3.1.ebuild?r1=1.1&r2=1.2