[MacPorts] #54215: gcc7, libgcc: broken on powerpc

[MacPorts]

#54215: gcc7, libgcc: broken on powerpc
---------------------------+----------------------
  Reporter:  mojca         |      Owner:  kencu
      Type:  defect        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:  fixed         |   Keywords:  haspatch
      Port:  gcc7, libgcc  |
---------------------------+----------------------

Comment (by ccorn):

 One more remark to the experimental `defaultabi4` and `staticlibgcc`
 variants: On my G5 (Darwin 9/PPC), `+defaultabi` does //not// prevent the
 previously described crashes (or rather endless unwind loops) of e.g.
 `octave-gui` and the `botan`-linked `monotone`. I still have to use
 `+staticlibgcc` to get those ports running fine.

 I have run tests for `gcc6` and `gcc7` with both variants enabled
 together. The test results do not differ from those with `+staticlibgcc`
 alone. As described earlier, this means 24 more `g++` testsuite failures
 than without `+staticlibgcc`. (I had entertained the dim hope that
 `+defaultabi4` would make those test failures go away, but alas.) On the
 other hand I can use `monotone` and `octave-gui` again, which is what
 counts for me.

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Ticket URL: <https://trac.macports.org/ticket/54215#comment:46>
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