[MacPorts] #49161: valgrind: failed check for a supported compiler on 10.7

[MacPorts]

#49161: valgrind: failed check for a supported compiler on 10.7
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  Reporter:  mojca@…   |      Owner:  raimue@…
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  valgrind  |
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Comment (by mojca@…):

 It might be related. But the weird fact is that I had valgrind installed
 already and it failed during an upgrade. The other ticket is 4 years old.
 (PS: If you want me to test the patch and provide feedback, I might only
 be able to do that in a very near future, I will upgrade to 10.11 very
 soon.)

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Ticket URL: <https://trac.macports.org/ticket/49161#comment:4>
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