[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 barracuda156):

 Replying to [comment:43 ballapete]:
 > Replying to [comment:38 kencu]:
 > >
 > > I wonder if the main guile port is ripe to be updated to 2.9.1 as
 well, and what, if anything, would be broken by so doing...
 >
 > No, it's not! https://www.gnu.org/software/guile/download/ states: "The
 latest release of Guile's legacy 2.2.x series is 2.2.7." Version 2.9.1
 could have been some experimental release. The official download site
 https://ftp.gnu.org/gnu/guile/ jumps from version 2.2.7 to version 3.0.0.
 I am going to try version 2.2.7 from March directly, no intermediate
 version 2.2.4 from July 2018.

 Intermediate versions are here: http://alpha.gnu.org/gnu/guile/
 The latest being 2.9.9.

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Ticket URL: <https://trac.macports.org/ticket/54124#comment:80>
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