[MacPorts] #38311: libstdcxx +universal configure failure

[MacPorts]

#38311: libstdcxx +universal configure failure
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  Reporter:  boydb@…    |      Owner:  mww@…
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.1.3
Resolution:             |   Keywords:
      Port:  libstdcxx  |
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Comment (by larryv@…):

 Replying to [comment:12 boydb@…]:
 > Though as a minor follow-up, should the install of libstdcxx been able
 > to find the Macports clang without me having to explicitly define it?
 > I do have Xcode 4.2 installed on this machine, so is "clang" not on
 > the fallback list for this system?

 The fallback list for Xcode 4.2 is clang > llvm-gcc-4.2 > apple-gcc-4.2.
 However, “clang” refers explicitly to the Clang included with Xcode. The
 Clang selected by `port select` is “macports-clang”, the use of which is
 more or less unsupported. We don’t really want users choosing their own
 compiler.

 The port should probably append `macports-clang-3.2` to its fallback list,
 though.

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Ticket URL: <https://trac.macports.org/ticket/38311#comment:13>
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