[MacPorts] #70185: netcdf +mpich fails to find MPI_CXX

[MacPorts]

#70185: netcdf +mpich fails to find MPI_CXX
-----------------------------------+----------------------
  Reporter:  Schamschula           |      Owner:  eborisch
      Type:  defect                |     Status:  assigned
  Priority:  Normal                |  Milestone:
 Component:  ports                 |    Version:  2.9.3
Resolution:                        |   Keywords:
      Port:  netcdf mpich-default  |
-----------------------------------+----------------------

Comment (by eborisch):

 Hrmm. For me, `sudo port -v configure netcdf +mpich` succeeds and locates
 mpi-cxx? (Log attached.)


 ```
 -- Found LibXml2: /opt/local/lib/libxml2.dylib (found version "2.13.5")
 -- Found MPI_C: /opt/local/bin/mpicc-mpich-mp (found version "4.1")
 -- Found MPI_CXX: /opt/local/lib/mpich-mp/libmpicxx.dylib (found version
 "4.1")
 -- Found MPI: TRUE (found version "4.1")
 ```

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Ticket URL: <https://trac.macports.org/ticket/70185#comment:3>
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