[MacPorts] #62807: openmpi/mpich: refactor duplicated logic, and simplify ports, via new portgroup

[MacPorts]

#62807: openmpi/mpich: refactor duplicated logic, and simplify ports, via new
portgroup
----------------------------+----------------------
  Reporter:  mascguy        |      Owner:  mascguy
      Type:  enhancement    |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:
      Port:  openmpi mpich  |
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Comment (by mascguy):

 Replying to [comment:3 eborisch]:
 > Another thought: I've been toying with the idea of having all the non-
 default (-clang*, etc) flavors use the ''default'' libraries and headers
 rather than build their own, with a defaulted-on ''+wrapperonly'' variant.
 >
 > In this mode, we would just make copies of {{{mpicc}}}, {{{mpicxx}}},
 etc. with the appropriate changes to CC/CXX etc. in the script (and
 continue to depend upon the compilers to make sure they are installed.)
 Executables like {{{mpiexec}}} could just be a symlink to the ''-default''
 {{{mpiexec}}} (likely easier to maintain than having a separate set of
 ''select'' files for the variants).
 >
 > It's typically rare interested in seeing how the different compilers do
 at generating the MPI libraries themselves, and you're more interested in
 using the features of a particular compiler for your (or another port's)
 code. This would drastically cut down the overhead for having multiple
 flavors of the wrappers around, while still leaving the options of
 disabling the variant if you want a full build of MPI libraries by that
 compiler.
 >
 > It looks like openmpi uses a binary mpicc (symlinked to a binary,
 actually), so I'm not sure how easy this would be to implement on openmpi,
 but it should be fairly easy on mpich.

 Interesting idea!

 Since the default flavor doesn't utilize the buildbot binaries, does that
 mean an install would always cause a build from source (at least for the
 default libs)?

-- 
Ticket URL: <https://trac.macports.org/ticket/62807#comment:14>
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