[MacPorts] #54124: guile @2.2.2 won't build on PPC Leopard, Mac OS X 10.5.8, because is uses non-existing /lib/cpp as C preprocessor

[MacPorts]

#54124: guile @2.2.2 won't build on PPC Leopard, Mac OS X 10.5.8, because is uses
non-existing /lib/cpp as C preprocessor
------------------------+---------------------------------------
  Reporter:  ballapete  |      Owner:  kencu
      Type:  defect     |     Status:  closed
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.4.1
Resolution:  fixed      |   Keywords:  tiger leopard snowleopard
      Port:  guile      |
------------------------+---------------------------------------

Comment (by kencu):

 Autogen will fail rev-upgrade for anyone who has guile installed, and
 autogen, and then guile updates to the 2.2 series. But I'm not going to
 revbump autogen just for the three people who have this scenario, and
 there is no buildbot for PowerPC at present anyway.

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Ticket URL: <https://trac.macports.org/ticket/54124#comment:61>
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