[MacPorts] #46797: whizard @2.2.3_0: update to 2.2.4, default to `+gcc49` variant, add `+gcc5` variant

[MacPorts]

#46797: whizard @2.2.3_0: update to 2.2.4, default to `+gcc49` variant, add `+gcc5`
variant
-------------------------------+---------------------------------
  Reporter:  juergen.reuter@…  |      Owner:  macports-tickets@…
      Type:  update            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:
Resolution:                    |   Keywords:  haspatch maintainer
      Port:  whizard           |
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Comment (by juergen.reuter@…):

 Replying to [comment:5 ryandesign@…]:
 > With gcc 5, the version numbering scheme has changed. Whereas we had gcc
 4.7, 4.8, 4.9, we will in the future have gcc 5, 6, 7, etc.
 >
 > So the description for the gcc5 variant should mention gcc 5 (not gcc
 5.0), and the `configure.compiler` directive should specify `macports-
 gcc-5` (not `macports-gcc-5.0`).
 >
 > The section that sets the `default_variants` to `+gcc49` should be
 updated to not do so if the gcc5 variant has already been selected.

 Hey, thanks for the remarks. I updated the Portfile accordingly.

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Ticket URL: <https://trac.macports.org/ticket/46797#comment:6>
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