[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 ballapete):

 On Leopard it worked, obviously with new `libff`, to build `Guile` with
 Leopard pre-built GO files within 4 h. No crash when creating the TEXI
 file.

 My procedure was:

 • outpack original `guile-2.2.7.tar.gz` «somewhere»
 • pushd $work/guile-2.2.7/bootstrap/
 • gtar zcf ~/bootstrap-Leo-GO-32-bit-big-endian.tar.gz ice-9 language srfi
 system
 • pushd «somewhere»/guile-2.2.7/prebuilt/32-bit-big-endian
 • gtar zxf ~/bootstrap-Leo-GO-32-bit-big-endian.tar.gz
 • pushd ../../..
 • gtar zcf /opt/local/var/macports/distfiles/guile/guile-2.2.7-Leo.tar.gz
 guile-2.2.7
 • rm /opt/local/var/macports/distfiles/guile/guile-2.2.7.tar.gz ; ln -s
 ./guile-2.2.7-Leo.tar.gz
 /opt/local/var/macports/distfiles/guile/guile-2.2.7.tar.gz
 • build again

 You can overwrite the pre-built GO files every time with a new set of 93
 bootstrapped GO files, then create the new Guile 2.2.7 tape archive, and
 finally re-link this to guile-2.2.7.tar.gz.

 I'll add a list of file sizes of the bootstrapped GO files from each try –
 they vary quite often!

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Ticket URL: <https://trac.macports.org/ticket/54124#comment:78>
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