[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 vertreko@…):

 Yeah, given your question re: atlas I started 'sudo port install arpack
 -accelerate +atlas'.  Unfortunately, after it scanned for linker errors it
 decided it needed to rebuild atlas, and in order to do that, it needed to
 compile and install gcc46, which it's been working on for the last half
 hour - LOL!  I've gone down the rabbit whole, and have the uncomfortable
 feeling that it will end with me deleting /opt ...

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Ticket URL: <https://trac.macports.org/ticket/39476#comment:19>
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