[MacPorts] #54993: Processing of port openmpi-gcc7 failed

[MacPorts]

#54993: Processing of port openmpi-gcc7 failed
---------------------------+------------------------
  Reporter:  ogourgue      |      Owner:  seanfarley
      Type:  defect        |     Status:  reopened
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.4.1
Resolution:                |   Keywords:  highsierra
      Port:  openmpi-gcc7  |
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Comment (by rieder):

 Would this be an acceptable workaround for the portfile? I'm not aware of
 any negative consequences this optflag may have.

 Replying to [comment:21 rieder]:
 > Following the suggestion on
 https://discussions.apple.com/thread/8127677, adding
 > {{{
 > configure.optflags-append   -mmacosx-version-min=10.12
 > }}}
 > to the portfile as a workaround makes it compile for me.

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Ticket URL: <https://trac.macports.org/ticket/54993#comment:22>
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