[MacPorts] #67459: mame: upstream issue tracking for 0.252 and later: 3rd-party component bgfx broken for 10.14/10.15

[MacPorts]

#67459: mame: upstream issue tracking for 0.252 and later: 3rd-party component bgfx
broken for 10.14/10.15
----------------------+----------------------
  Reporter:  mascguy  |      Owner:  mascguy
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.8.1
Resolution:           |   Keywords:
      Port:  mame     |
----------------------+----------------------

Comment (by mascguy):

 Upstream - and specifically, Rob Belmont - was kind enough to provide the
 following patch. They aren't able to commit it to mainline at this point,
 but looks promising:

 * https://github.com/mamedev/mame/issues/11245#issuecomment-1555376149
 * https://gist.github.com/rb6502/8a1736ee3775f998e8e71faa47ae4b59

 Currently testing locally on 10.14/10.15, to see if it does the trick.

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Ticket URL: <https://trac.macports.org/ticket/67459#comment:2>
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