[MacPorts] #63304: clang 3.4 @3.4.2_15: Build fails (incompatible cpu-subtype) on a G3

[MacPorts]

#63304: clang 3.4 @3.4.2_15: Build fails (incompatible cpu-subtype) on a G3
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  Reporter:  evanmiller  |      Owner:  jeremyhu
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:              |   Keywords:  ppc
      Port:  clang-3.4   |
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Comment (by kencu):

 FWIW, all versions of clang are unable to build anything useful on PPC,
 G3, G4, or G5 -- the PPC code generator in LLVM is broken when it comes to
 the Darwin PPC ABI.

 G3 altivec hiccups appear to be a port-by-port issue, like this flag added
 in clang-3.4 assuming altivec, or the broken cmake system altivec test in
 libjpeg-turbo. It is not a general MacPorts issue, although no doubt
 you'll find more ports that assume altivec if they support ppc at all.

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Ticket URL: <https://trac.macports.org/ticket/63304#comment:5>
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