[MacPorts] #55054: configure.pkg_config_path does not work with more than one value

[MacPorts]

#55054: configure.pkg_config_path does not work with more than one value
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  Reporter:  MarcusCalhoun-Lopez  |      Owner:
      Type:  defect               |     Status:  new
  Priority:  Normal               |  Milestone:
 Component:  base                 |    Version:
Resolution:                       |   Keywords:
      Port:                       |
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Comment (by MarcusCalhoun-Lopez):

 Replying to [comment:1 jmroot]:
 > Why doesn't this work?
 > {{{
 > configure.pkg_config_path
 ${frameworks_dir}/Python.framework/Versions/2.7/lib/pkgconfig:${prefix}/libexec/qt4/lib/pkgconfig
 > }}}
 I do not believe this would work in general since
 {{{configure.pkg_config_path}}} is modified in different parts of the code
 on a conditional basis.[[BR]]
 For example, {{{${prefix}/libexec/qt4/lib/pkgconfig}}} is added by the
 [https://github.com/macports/macports-
 ports/blob/9ea2c9cceb406c1375cd008a017cc07be581fa52/_resources/port1.0/group/qt4-1.0.tcl#L219
 qt4 PG]
 and **only** if the [https://github.com/macports/macports-
 ports/blob/9ea2c9cceb406c1375cd008a017cc07be581fa52/net/avahi/Portfile#L148
 qt4 variant] is selected.

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Ticket URL: <https://trac.macports.org/ticket/55054#comment:2>
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