RFC: Support for future compilers in base

[Sean Farley]

Rainer Müller writes:

> On 2013-02-15 09:10, Jeremy Huddleston Sequoia wrote:
>> I'd like to update base trunk such that future versions of clang, dragonegg, and gcc "just work", so we don't need to wait for newer versions of base to depend on newer compilers.
>> 
>> I've taken a first pass at portconfigure.tcl and here is a patch.  Comments?  Concerns?
>
> Fine with me.
>
> This change makes sense as the features supported by the gcc and clang
> compilers shipped in ports are almost homogenous at the moment; in the
> past there were differences as not all gcc4* shipped gfortran or gcj.
> However, I don't expect the situation to change in the near future.

Clang doesn't provide fortran but all gcc ports do. How is that almost
homogenous? That's a huge difference when building mpi-dependent ports.