[MacPorts] #50845: libunwind: fails to find 'bits/c++config.h' on 10.5/PPC

[MacPorts]

#50845: libunwind: fails to find 'bits/c++config.h' on 10.5/PPC
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  Reporter:  mojca@…    |      Owner:  jeremyhu
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:  leopard
      Port:  libunwind  |
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Comment (by ken-cunningham-webuse):

 a bit more - for anyone who tries to build libunwind

 it doesn't want to build universal (i386 + ppc simultaneously) on either
 intel or on ppc. It delivers errors such as above when it tries to build
 universal. It will build for i386 alone on 10.5 Intel - if you disable the
 universal build. No other portfile changes needed.

 it will build for ppc with the configure lines mentioned above, even on an
 intel machine.
 also {{{-fPIE -pie}}} can be replaced with {{{-fPIC}}} and the build for
 ppc works as well.

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Ticket URL: <https://trac.macports.org/ticket/50845#comment:5>
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