The bug was fixed in 3.1b1. I should have left it in for the non-devel
version. I'll patch it and resubmit.

On Saturday, August 10, 2013, Jack Nagel wrote:

> In Library/Formula/mpich2.rb:
>
> > @@ -24,18 +29,6 @@ class Mpich2 < Formula
> >
> >    conflicts_with 'open-mpi', :because => 'both install mpi__ compiler wrappers'
> >
> > -  # fails with clang from Xcode 4.5.1 on 10.7 and 10.8 (see #15533)
> > -  # linker bug appears to have been fixed by Xcode 4.6
> > -  fails_with :clang do
> > -    build 421
> > -    cause <<-EOS.undent
> > -      Clang generates code that causes the linker to segfault when building
> > -      MPICH with shared libraries.  Specific message:
> > -
> > -          collect2: ld terminated with signal 11 [Segmentation fault: 11]
> > -      EOS
> > -  end if build.include? 'enable-shared'
> > -
>
> Why was this removed?
>
> —
> Reply to this email directly or view it on GitHub<https://github.com/mxcl/homebrew/pull/21763/files#r5698934>
> .
>