Specify full path name of c and c++ compilers.
Specify full path name of c and c++ compilers.

Changed
-------

Use the real path name for clang and clang++ (that is, /usr/bin/clang
and /usr/bin/clang++). Using just clang and clang++ results in them
being set to those under /usr/local/Library/ENV, which causes problems
when using babel after homebrew has built it.

csdms/homebrew-tools