Fortran recipe

[Eric A. Borisch]

Sorry for the blank email. Gmail interface whoops.

So I come back from vacation and find the mpich port (I'm maintainer;
with openmaintainer) has been completely [1] revamped.

The variants no longer do what I intended them to do. MPICH provides a
set of compiler wrappers (mpicc, mpicxx, etc.) that wrap compilers to
support MPI compilation as defined by the MPI standard. Previously the
variants (eg +gcc46) would wrap gcc-mp-4.6, g++-mp-4.6, etc. The
variants have been modified to now only wrap the fortran supplied from
the variant, and the CC and CXX are left to whatever MacPorts is
selecting as default on the system. Some of the variants (+clang and
friends) have been nuked completely.

Now, I see from the thread (tl;dr) that there's been some thought put
in to what's going on here, and in other ports that use fortran from
gccXX, but I'd like to put mpich back to wrapping the requested
compiler suite (and not just fortran.)

There was some separate discussion about a multiplecompilers port
group to handle some of these issues. Again, I haven't had time to go
back through all the messages to see what's going on with that and why
these changes were made instead.

Sooo. I'm considering reverting the changes made to the mpich
portgroup over the past week. Given that the assumption at the
beginning of this thread - "If the port also has C and C++ sources,
then it would be preferable to leave configure.cc and configure.cxx
alone and just choose a fortran compiler" -- isn't correct in this
case, is there any reason _not_ to revert these changes?

Thanks,
 Eric

[1] https://trac.macports.org/changeset?reponame=&new=110168%40trunk%2Fdports%2Fscience%2Fmpich%2FPortfile&old=108404%40trunk%2Fdports%2Fscience%2Fmpich%2FPortfile