[MacPorts] #59621: poppler does not build on legacy Leopard

[MacPorts]

#59621: poppler does not build on legacy Leopard
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  Reporter:  rmottola  |      Owner:  dbevans
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  leopard legacy-os
      Port:  poppler   |
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Comment (by kencu):

 I find that clang-7.0 triggers this error in several ports, but not with
 the legacy-support test suite...

 using clang-5.0 or gcc-7 has worked in each case for me.
 Clang tightened up redefining asm declarations and made them errors; I
 assume that is why clang-5.0 works but 7.0 does not.

 How to fix it properly so clang-7.0 is happy currently eludes me.

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Ticket URL: <https://trac.macports.org/ticket/59621#comment:6>
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