[MacPorts] #64257: graphviz: error: C compiler cannot create executables

[MacPorts]

#64257: graphviz: error: C compiler cannot create executables
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  Reporter:  mrkapqa   |      Owner:  ryandesign
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.7.1
Resolution:            |   Keywords:  lion
      Port:  graphviz  |
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Comment (by mrkapqa):

 thanks,
 seem to have resolved this issue for ffmpeg
 by re-installing, xcode 4.6.3 for lion, command line tools for lion april
 2013, and latest macports.pkg for lion.

 there seem however other factors included for mpv  which iam not able to
 resolve atm, so please close this ticket.

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Ticket URL: <https://trac.macports.org/ticket/64257#comment:5>
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