[MacPorts] #43939: libpng: pngconf.h:366:52: error: token is not a valid binary operator in a preprocessor subexpression

[MacPorts]

#43939: libpng: pngconf.h:366:52: error: token is not a valid binary operator in a
preprocessor subexpression
-------------------------+--------------------------
  Reporter:  macports@…  |      Owner:  ryandesign@…
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.0
Resolution:              |   Keywords:
      Port:  libpng      |
-------------------------+--------------------------

Comment (by macports@…):

 Replying to [comment:2 ryandesign@…]:
 The steps you supplied (below) to work around the problem with clang
 worked.


 Thank you for restating my clumsy problem description. I am again able to
 install gimp2 cleanly.

 >
 > {{{
 > sudo port clean gegl
 > sudo port install clang-3.4
 > sudo port install gegl configure.compiler=macports-clang-3.4
 > }}}
 > <snip>

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Ticket URL: <https://trac.macports.org/ticket/43939#comment:3>
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