mxcl/homebrew — pull request #10232 by steder (2012-02-16 16:27:16+00:00)
Title: Adding MPICH2 formula for C and C++

This formula builds MPICH2 with the ch3:nemesis (shared memory + sockets) implementation.
I disable Fortran 77/90 as I don't have a need for them in my use case and MPICH2
treats a missing fortran compiler as an error unless you explicitly say you don't
need fortran support.

For my use case I often need shared libraries so that's the only other weird configuration
tweak in this formula.

I've tested on a couple OS X Lion machines with XCode 4 installed.