[MacPorts] #59818: openmpi-devel-gcc9 @4.0.1: error: ptrdiff_t type is not available

[MacPorts]

#59818: openmpi-devel-gcc9 @4.0.1: error: ptrdiff_t type is not available
---------------------------------+--------------------
  Reporter:  oliviermarti        |      Owner:  (none)
      Type:  defect              |     Status:  new
  Priority:  Normal              |  Milestone:
 Component:  ports               |    Version:  2.6.2
Resolution:                      |   Keywords:
      Port:  openmpi-devel-gcc9  |
---------------------------------+--------------------

Comment (by kencu):

 please attach the main log file from the build, which will be referenced
 by the error message. It is usually best if you clean first, try again,
 and then attach that clean log for us to see:
 {{{
 sudo port clean openmpi-devel-gcc9
 sudo port -v install openmpi-devel-gcc9
 }}}

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Ticket URL: <https://trac.macports.org/ticket/59818#comment:2>
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