[MacPorts] #39842: xkeyboard-config @2.5.1: autoreconf fails with "possibly undefined macro: AM_GLIB_GNU_GETTEXT"

[MacPorts]

#39842: xkeyboard-config @2.5.1: autoreconf fails with "possibly undefined macro:
AM_GLIB_GNU_GETTEXT"
----------------------+------------------------------
 Reporter:  larryv@…  |      Owner:  jeremyhu@…
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.2.99
 Keywords:            |       Port:  xkeyboard-config
----------------------+------------------------------
 Switching out `AM_GLIB_GNU_GETTEXT` for `AM_GNU_GETTEXT([external])`
 allows the configure phase to complete successfully without requiring
 glib2 to be present. I can commit the change, but I don’t trust my
 Autotools-fu enough to do it without a second opinion.

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Ticket URL: <https://trac.macports.org/ticket/39842>
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