[MacPorts] #65677: libjxl: port request

[MacPorts]

#65677: libjxl: port request
----------------------+---------------------
  Reporter:  mascguy  |      Owner:  mascguy
      Type:  request  |     Status:  closed
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.7.2
Resolution:  fixed    |   Keywords:
      Port:  libjxl   |
----------------------+---------------------

Comment (by mascguy):

 While I know it's early - with items like `giflib5` still outstanding - I
 took a quick stab at fixing the build issues for older macOS releases.

 My approach was to simply utilize `macports_libcxx`, via pg
 `legacysupport` 1.1, to handle the issues. That seems to do the trick,
 except for one last item: The final link fails, due to use of `--exclude-
 libs=ALL`. (It wasn't clear to me whether further changes are needed for
 the cmake patch related to that, or if I'm missing something else.)

 Attached is my local portfile for `libjxl-devel`, which I've been testing
 with. I don't plan on committing this though - unless you want me to? - as
 it'll arguably be superfluous once the current port is finalized.

 Anyhow, if you're interested, see attached. Not sure whether you'll find
 it helpful, but it also includes a few minor fixes for outstanding lint
 issues.

-- 
Ticket URL: <https://trac.macports.org/ticket/65677#comment:4>
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