[MacPorts] #65630: GraphicsMagick: add debug variant

[MacPorts]

#65630: GraphicsMagick: add debug variant
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  Reporter:  mascguy         |      Owner:  mascguy
      Type:  enhancement     |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.7.2
Resolution:                  |   Keywords:  debug
      Port:  GraphicsMagick  |
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Comment (by Christopher Nielsen <mascguy@…>):

 In [changeset:"99e1ff5d9dfe31857e559eb60eb360f4504b8e66/macports-ports"
 99e1ff5d9dfe31857e559eb60eb360f4504b8e66/macports-ports] (master):
 {{{
 #!ConfigurableCommitTicketReference repository="macports-ports"
 revision="99e1ff5d9dfe31857e559eb60eb360f4504b8e66"
 pg debug: drop mtune=native for non-debug builds
 - More generally, ensure non-debug builds not affected, period
 - Also ensure flags are set for ObjC/Cxx
 Fixes: https://trac.macports.org/ticket/65132
 See: https://trac.macports.org/ticket/65630
 }}}

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Ticket URL: <https://trac.macports.org/ticket/65630#comment:12>
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