[MacPorts] #41343: python extension module builds missing -I/opt/local/include

[MacPorts]

#41343: python extension module builds missing -I/opt/local/include
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  Reporter:  nad@…                       |      Owner:  macports-tickets@…
      Type:  defect                      |     Status:  new
  Priority:  Normal                      |  Milestone:
 Component:  ports                       |    Version:  2.2.1
Resolution:                              |   Keywords:
      Port:  python27 python33 python34  |
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Comment (by vergus@…):

 I was just about to submit a bug against pyyaml for not finding yaml.h,
 but this bug explains the issue.

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Ticket URL: <https://trac.macports.org/ticket/41343#comment:2>
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