[MacPorts] #56120: pkgconfig fails to find python3

[MacPorts]

#56120: pkgconfig fails to find python3
--------------------+-------------------
 Reporter:  aleb    |      Owner:
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  base    |    Version:  2.4.2
 Keywords:          |       Port:
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 I have port:python36 but pkg-config fails to find it:


 {{{
 $ find /opt/custom | grep \\.pc$ | grep -i python
 /opt/custom/Library/Frameworks/Python.framework/Versions/2.7/lib/pkgconfig/python-2.7.pc
 /opt/custom/Library/Frameworks/Python.framework/Versions/2.7/lib/pkgconfig/python.pc
 /opt/custom/Library/Frameworks/Python.framework/Versions/2.7/lib/pkgconfig/python2.pc
 /opt/custom/Library/Frameworks/Python.framework/Versions/3.6/lib/pkgconfig/python-3.6.pc
 /opt/custom/Library/Frameworks/Python.framework/Versions/3.6/lib/pkgconfig/python-3.6m.pc
 /opt/custom/Library/Frameworks/Python.framework/Versions/3.6/lib/pkgconfig/python3.pc

 $ which python3
 /opt/custom/bin/python3

 $ /opt/custom/bin/pkg-config --list-all | grep python
 .. crickets ..

 }}}

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Ticket URL: <https://trac.macports.org/ticket/56120>
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