[gentoo-cluster] OpenMPI ebuild (switchable!)

[gentoo-cluster] OpenMPI ebuild (switchable!)

[Eric Thibodeau]

Hello all,

	I've started "serious" work on an OpenMPI ebuild. I am implementing a modular approach for the --prefix= as per Donnie's e-mail concerning "Switchable MPI":

> MPI_IMPLEMENTATION="$implementation"
> PATH="/usr/lib/mpi/$implementation/$version/$compiler/bin:$PATH"
> LD_LIBRARY_PATH="/usr/lib/mpi/$implementation/$version/$compiler/lib:$LD_LIBRARY_PATH"
> CPPFLAGS="-I/usr/lib/mpi/$implementation/$version/$compiler/include:$CPPFLAGS"
> MANPATH="/usr/lib/mpi/$implementation/$version/$compiler/share/man:$MANPATH"
> INFOPATH="/usr/lib/mpi/$implementation/$version/$compiler/share/info:$INFOPATH

	As I commented on the "Switchable MPI" thread, I'd foresee eselect being used _by users_ to set the proper environment variables (but keep comments on this in the "Switchable MPI" thread).

	I'll post the ebuild on bugs.gentoo.org as soon as I get an alpha one up and runnung (next few days). Since there is an overwhealming amount of configuration options, I'll count on all of your inputs for guidance ;)

Eric Thibodeau
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