[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:
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.4.1
Resolution:             |   Keywords:  tiger leopard snowleopard
      Port:  guile      |
------------------------+---------------------------------------
Changes (by ryandesign):

 * keywords:  Leopard => tiger leopard snowleopard


Comment:

 I'm not surprised. /lib/cpp is a fallback that configure scripts use as a
 location for cpp when all other choices have been exhausted. It is not
 meant for macOS; one of the cpp locations tried earlier is meant to have
 worked on macOS, but has failed for another reason. That reason appears to
 be that this build system is trying to make Apple's gcc 4.2.1 use C11,
 which it does not support. If this build system requires C11 support, old
 compilers will have to be blacklisted.

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Ticket URL: <https://trac.macports.org/ticket/54124#comment:3>
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