[MacPorts] #63105: ghostscript @9.54.0 does not build with GCC 4.2 because "#pragma GCC diagnostic not allowed inside functions"

[MacPorts]

#63105: ghostscript @9.54.0 does not build with GCC 4.2 because "#pragma GCC
diagnostic not allowed inside functions"
--------------------------+---------------------------
  Reporter:  ballapete    |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.7.1
Resolution:               |   Keywords:  leopard tiger
      Port:  ghostscript  |
--------------------------+---------------------------

Comment (by evanmiller):

 Proposed fix, blacklisting old compilers instead of modifying the source
 code: https://github.com/macports/macports-ports/pull/11628

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Ticket URL: <https://trac.macports.org/ticket/63105#comment:8>
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