SimTk/mdtraj — pull request #573 by rmcgibbo (2014-09-06 00:07:44+00:00)
Title: Fix compiler detection using a CC env variable

When you have `CC` exported to a different compiler, the compiler features detection code in setup.py wasn't looking at the non-default compiler.

With this change, `export CC=gcc44` on vsp-compute (or other centos 5 machines whose default compiler is gcc4.1, but which have a more recent gcc installed) now works.