[MacPorts] #55991: Mistakenly (?) install openmpi-gcc7 with requested variants +openmpi +clang50

[MacPorts]

#55991: Mistakenly (?) install openmpi-gcc7 with  requested variants +openmpi
+clang50
-------------------------+------------------
 Reporter:  platipodium  |      Owner:
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  esmf
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 The following seems wrong to me

 {{{

 port install clang-5.0 openmpi-clang50
 port clean esmf

 port install esmf +clang50 +openmpi
 --->  Computing dependencies for esmf
 The following dependencies will be installed:  openmpi-gcc7
 }}}


 Why does esmf have gcc7 as dependency when I request clang50?

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Ticket URL: <https://trac.macports.org/ticket/55991>
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