[MacPorts] #56241: jack @ 1.9.12_0 fails to build on 10.10.5

[MacPorts]

#56241: jack @ 1.9.12_0 fails to build on 10.10.5
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 Reporter:  ci42    |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  jack
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 See the attached log.

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Ticket URL: <https://trac.macports.org/ticket/56241>
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