[MacPorts] #63445: glib2 2.62.6 +universal +quartz: fails to merge .pc files

[MacPorts]

#63445: glib2 2.62.6 +universal +quartz: fails to merge .pc files
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  Reporter:  joelkraehemann  |      Owner:  (none)
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.7.1
Resolution:                  |   Keywords:  universal
      Port:  glib2           |
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Comment (by ryandesign):

 I was hoping to see some obvious references to libm or `-lm` in the
 configure phase output but I don't see that.

 The problem doesn't exist when building universal for x86_64 and i386 on
 10.13. `-lm` is present in the pc file for both architectures so there is
 no problem merging them.

 Certainly we can try updating the port and see if that helps. As usual,
 I'd prefer to update glib2-devel first and not update glib2 until later.

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Ticket URL: <https://trac.macports.org/ticket/63445#comment:6>
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