[MacPorts] #51750: libarchive @3.2.1_0 fails building on 10.5.8 PPC

[MacPorts]

#51750: libarchive @3.2.1_0 fails building on 10.5.8 PPC
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  Reporter:  braumann@…  |      Owner:  toby@…
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.4
Resolution:  fixed       |   Keywords:
      Port:  libarchive  |
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Comment (by braumann@…):

 Replying to [comment:6 toby@…]:
 > As for "the programmer of libarchive" - they didn't even use
 __has_builtin, that was my first attempt at fixing it - which does work
 fine on non-ancient compilers.
 Well, `gcc5` is not too ancient so far, but it also failed at that point,
 not only the good old `gcc42`.

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Ticket URL: <https://trac.macports.org/ticket/51750#comment:9>
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