[MacPorts] #55967: Missing dependency

[MacPorts]

#55967: Missing dependency
---------------------+-------------------
 Reporter:  Bachsau  |      Owner:
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.4.2
 Keywords:  mesa     |       Port:  glade
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 Build fails because of a dependency on "gl.pc" which is not present
 without having mesa installed, but its not a dependency. As macports is
 not capable of searching for a file in available packages it took me a
 long time to figure this out.

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Ticket URL: <https://trac.macports.org/ticket/55967>
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