[MacPorts] #65630: GraphicsMagick: add debug variant

[MacPorts]

#65630: GraphicsMagick: add debug variant
-----------------------------+----------------------
  Reporter:  mascguy         |      Owner:  mascguy
      Type:  enhancement     |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.7.2
Resolution:                  |   Keywords:  debug
      Port:  GraphicsMagick  |
-----------------------------+----------------------

Comment (by mascguy):

 Replying to [comment:8 mascguy]:
 > As for the debug variant: Based on local testing, the `debug` portgroup
 does the trick for this port. Are there any concerns/gotchas with
 utilizing that?

 My only concern, is that pg `debug` unconditionally adds `-mtune=native`
 for non-debug builds. And ideally the pg shouldn't touch anything in that
 case.

 I'm wondering if we should eliminate that behavior...?

-- 
Ticket URL: <https://trac.macports.org/ticket/65630#comment:10>
MacPorts <https://www.macports.org/>
Ports system for macOS