[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
----------------------+----------------------
  Reporter:  mascguy  |      Owner:  mascguy
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  mame     |
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Comment (by mascguy):

 Jokes aside, do you know whether our buildbots support side-by-side Xcode
 installations?

 I ask, as that's how some of my macOS installations are setup, when it's
 necessary to test against multiple Xcode releases. So for macOS 10.13,
 this is my setup:

 {{{
 /Applications/Xcode-9.4.1.app
 /Applications/Xcode-10.1.app
 /Applications/Xcode.app -> Xcode-10.1.app
 }}}

 It would be awesome if the buildbots supported this, driven by a portfile
 declaration. (Though a global softlink in /Applications wouldn't work,
 when supporting multiple builds simultaneously...)

 Your thoughts?

-- 
Ticket URL: <https://trac.macports.org/ticket/62049#comment:9>
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