[MacPorts] #62049: mame: @0.227 build failure on macOS 10.13 and Xcode 9.4.1, due to aligned_alloc

[MacPorts]

#62049: mame: @0.227 build failure on macOS 10.13 and Xcode 9.4.1, due to
aligned_alloc
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  Reporter:  mascguy  |      Owner:  mascguy
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  mame     |
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Comment (by kencu):

 I have fixed a few of these.

 The blocks are put in to the llvm tree based on the capabilities of
 libc++.dylib at the time (or maybe based on an error), then libc++.dylib
 on 10.13 is updated, and the block is no longer accurate.

 These are super easy to fix, but requiring recompiling all of the
 clang-N's for what amounts to a 3 digit change in one {{{__config}}} file.

 See <https://github.com/llvm/llvm-
 project/blob/6529d7c5a45b1b9588e512013b02f891d71bc134/libcxx/include/__config#L393>
 for the tiny tiny little change needed.

-- 
Ticket URL: <https://trac.macports.org/ticket/62049#comment:3>
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