[MacPorts] #61613: xorg-libX11 @1.7.0 does not build on PPC Leopard, Mac OS X 10.5.8, because "error: #pragma GCC diagnostic not allowed inside functions"

[MacPorts]

#61613: xorg-libX11 @1.7.0 does not build on PPC Leopard, Mac OS X 10.5.8, because
"error: #pragma GCC diagnostic not allowed inside functions"
--------------------------+---------------------
  Reporter:  ballapete    |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.6.4
Resolution:               |   Keywords:  leopard
      Port:  xorg-libX11  |
--------------------------+---------------------

Comment (by ballapete):

 Using `configure.compiler=macports-gcc-7` lets `xorg-libX11` build.

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Ticket URL: <https://trac.macports.org/ticket/61613#comment:1>
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