[MacPorts] #66738: mpi PG should be fixed: currently mpi.setup require demands for mpich-default which demands clang

[MacPorts]

#66738: mpi PG should be fixed: currently mpi.setup require demands for mpich-
default which demands clang
--------------------------+----------------------
 Reporter:  barracuda156  |      Owner:  catap
     Type:  defect        |     Status:  assigned
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.8.0
 Keywords:                |       Port:  mpi
--------------------------+----------------------
 Example of the problem:
 {{{
 10:~ svacchanda$ /usr/bin/sudo port -v -n build parmetis
 --->  Computing dependencies for parmetis..mpich-default is known to fail.
 Try to install anyway? [y/N]: n
 Error: mpich-default is known to fail
 Error: Follow https://guide.macports.org/#project.tickets if you believe
 there
 is a bug.
 Error: Processing of port parmetis failed
 }}}

 Now, the only combination that allows the build to proceed is this:
 {{{
 if {${os.platform} eq "darwin" && ${os.arch} eq "powerpc"} {
     mpi.setup       require require_fortran
 } else {
     mpi.setup       require
 }
 }}}

 Notice, `require -clang -fortran` does not work. Even fortran is not
 needed at all, `require_fortran` is needed to trick around mpi PG
 stupidity.

-- 
Ticket URL: <https://trac.macports.org/ticket/66738>
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