[MacPorts] #42850: tk @8.6.1_1 fails to build on 10.9.2 (mavericks)

[MacPorts]

#42850: tk @8.6.1_1 fails to build on 10.9.2 (mavericks)
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  Reporter:  mtb19@…  |      Owner:  mww@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.2.1
Resolution:           |   Keywords:
      Port:  tk       |
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Comment (by raphael@…):

 Replying to [comment:1 mtb19@…]:
 > The error ("error: garbage collection is no longer supported") is
 foreign to me....

 This means that the Objective-C compiler does no longer support garbage
 collection, which is requested by tk with the command line option
 {{{-fobjc-gc}}}.

 The attached patches work for me. I think, they should only be applied if
 the compiler does not support garbage collection (clang in Xcode 5.1 and
 above?).

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Ticket URL: <https://trac.macports.org/ticket/42850#comment:5>
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