[MacPorts] #62428: gobject-introspection @1.60.2_5 fails to configure (with fixes)

[MacPorts]

#62428: gobject-introspection @1.60.2_5 fails to configure (with fixes)
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  Reporter:  dsteck                 |      Owner:  dbevans
      Type:  defect                 |     Status:  assigned
  Priority:  Normal                 |  Milestone:
 Component:  ports                  |    Version:
Resolution:                         |   Keywords:
      Port:  gobject-introspection  |
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Comment (by michaelld):

 @jmroot: this last change works nicely & makes a lot of sense. Seems like
 an oversight on the part of the upstream project: the function
 `AM_CHECK_PYTHON_HEADERS` calls a project-internal script `m4/python.m4`
 where `CPP` is required in `AC_TRY_CPP`, but neither script actually
 checks for `AC_PROG_CPP` as you added there.

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Ticket URL: <https://trac.macports.org/ticket/62428#comment:10>
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