[MacPorts] #37994: qt4-mac: Objective-C block (^) support not detected

[MacPorts]

#37994: qt4-mac: Objective-C block (^) support not detected
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  Reporter:  ryandesign@…  |      Owner:  michaelld@…
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.1.3
Resolution:                |   Keywords:  leopard
      Port:  qt4-mac       |
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Comment (by ryandesign@…):

 Anyone who experienced the problem, then ran selfupdate and tried again
 without manually cleaning, would still fail, because r102936 did not
 change the Portfile, and therefore MacPorts wouldn't know that it should
 clean before trying again. So I made a small unrelated change to the
 Portfile in r102951 to trigger the automatic clean.

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Ticket URL: <https://trac.macports.org/ticket/37994#comment:8>
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