[MacPorts] #52468: gtk3 3.22.0_0 build fails on 10.5 ppc

[MacPorts]

#52468: gtk3 3.22.0_0 build fails on 10.5 ppc
-------------------------+-----------------------------
  Reporter:  dgonyier@…  |      Owner:  devans@…
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.4
Resolution:              |   Keywords:  leopard powerpc
      Port:  gtk3        |
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Comment (by jeremyhu@…):

 Note that `cxx_stdlib        macports-libstdc++` actually isn't supported
 by the toolchain.  Having this in your macports.conf file right now has
 the nice effect of causing an error (basically, "I don't know what
 macports-libstdc++ is") if something ends up trying to use clang++ rather
 than g++-mp-6 to compile C++ code (which is what you want).

 Option 4c is probably the best approach if you want a modern toolchain for
 darwin/ppc and don't have the expertise to push on the libunwind blockers
 for libc++ on Leopard.

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Ticket URL: <https://trac.macports.org/ticket/52468#comment:46>
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