[compiler "gcc@4.5.0"]
    cc  = /path/to/gcc
    cxx = /path/to/g++
    f77 = /path/to/gfortran
    fc  = /path/to/gfortran

[compiler "clang@3.3"]
    cc  = /path/to/clang
    cxx = /path/to/clang++
    f77 = None
    fc  = None

