[MacPorts] #42899: llvm-gcc42 fails to install after installing Xcode 5.1

[MacPorts]

#42899: llvm-gcc42 fails to install after installing Xcode 5.1
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  Reporter:  tcollett+macports@…  |      Owner:  jeremyhu@…
      Type:  defect               |     Status:  new
  Priority:  Normal               |  Milestone:
 Component:  ports                |    Version:  2.2.1
Resolution:                       |   Keywords:
      Port:  llvm-gcc42           |
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Comment (by jmr@…):

 Replying to [comment:9 ryandesign@…]:
 > Replying to [comment:7 thorbenj-macports@…]:
 > > OR, maybe port invocation is to blame:
 > >
 > > {{{
 > > # port install llvm-gcc42 configure.cflags-append "-Wno-unused-
 command-line-argument-hard-error-in-future"
 > > }}}
 > >
 > > Which is what I understood from:
 https://guide.macports.org/chunked/reference.phases.html#reference.phases.installation
 >
 > If that's the command you ran, certainly you should not do that. Just
 run "sudo port install llvm-gcc42". Overriding portfile variables at the
 command line is not supported.

 More to the point, `configure.cflags-append` is not a variable. Also,
 saying to “just" install the port normally kind of misses the point; the
 idea was to check if disabling that warning made the build not fail.

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Ticket URL: <https://trac.macports.org/ticket/42899#comment:15>
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