[MacPorts] #39476: arpack's openmpi variant conflicts with gcc45

[MacPorts]

#39476: arpack's openmpi variant conflicts with gcc45
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  Reporter:  mk@…    |      Owner:  mmoll@…
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.1.3
Resolution:          |   Keywords:
      Port:  arpack  |
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Comment (by mk@…):

 I am running Snow Leopard here.

 If I deactivate atlas before building arpack I can install it successfully
 as well, i.e. the second suggestions in comment:54 is also valid
 workaround!

 OK, I haven't made that change to the Portfile since I wasn't sure for
 which situation I should test it.

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Ticket URL: <https://trac.macports.org/ticket/39476#comment:57>
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