[MacPorts] #60491: openmpi @4.0.1_1: openmpi-gcc10 - missing subport

[MacPorts]

#60491: openmpi @4.0.1_1: openmpi-gcc10 - missing subport
-----------------------------+--------------------
  Reporter:  majoc-at-astro  |      Owner:  (none)
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.6.2
Resolution:                  |   Keywords:
      Port:  openmpi         |
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Comment (by majoc-at-astro):

 Today's discoveries:

 * `openmpi-gcc10` being found missing causes `port select mpi openmpi-
 gcc10-fortran` to fail.  (The Warning's there in our build logs, but it's
 easily overlooked.)
 * Thereafter, `port install gnudatalanguage` without `+openmpi` fails to
 find `mpi.h`, result Misery.
 * On the offchance. I tried `port install openmpi-gcc9`, which failed with
 `ptrdiff_t type is not available`.  This is an early (non-)result;
 potential links with ticket:59818 may quite possibly include at least one
 red herring.  Logfile available if necessary, and if reproducible in our
 nightly runs.

 Please do let me know if there's anything else I could try.  Thanks in
 advance.

-- 
Ticket URL: <https://trac.macports.org/ticket/60491#comment:2>
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