[MacPorts] #67590: openexr @3.1.8: build failures: 10.8 and earlier (unknown type name 'dispatch_semaphore_t'); ppc/gcc: ('isnan' was not declared in this scope)

[MacPorts]

#67590: openexr @3.1.8: build failures: 10.8 and earlier (unknown type name
'dispatch_semaphore_t'); ppc/gcc: ('isnan' was not declared in this scope)
-------------------------+-------------------------------------------------
  Reporter:              |      Owner:  mascguy
  barracuda156           |
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.8.1
Resolution:              |   Keywords:  powerpc, leopard, snowleopard,
      Port:  openexr     |  lion, mountainlion
-------------------------+-------------------------------------------------

Comment (by mascguy):

 Replying to [comment:3 barracuda156]:
 > `isnan` error fixed in
 https://github.com/AcademySoftwareFoundation/openexr/commit/729f42648d5a522bba0d8f52061c0368a5d31bbb

 Can you also let them know about the error related to
 `dispatch_semaphore_t`, occurring for 10.8 and earlier?

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Ticket URL: <https://trac.macports.org/ticket/67590#comment:4>
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