[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:  reopened
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.4.1
Resolution:             |   Keywords:  tiger leopard snowleopard
      Port:  guile      |
------------------------+---------------------------------------

Comment (by ballapete):

 Replying to [comment:23 kencu]:
 > there may be an actual fix for guile on powerpc here
 <https://marc.info/?l=openbsd-ports&m=157757173428256&w=2>
 There is one change I had to add to Portfile: usage of `GCC6` which is
 selected as standard compiler. The reason is that from somewhere a C
 compiler switch ´-std=gnu11` is added which does not allow `GCC 4.2` to
 successfully build any file (which could be the actual cause that
 `/lib/cpp` is chosen for C pre-processor). The first try is just a plain
 build of Guile @2.2.2, next I'll try will be with recent version @2.2.4.

 Although I have a problem: why did I need Guile then? Autoconf? Autogen?

-- 
Ticket URL: <https://trac.macports.org/ticket/54124#comment:25>
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