[MacPorts] #39782: Add keyword to list compatible graphical environments (X11, Quartz, Wayland)?

[MacPorts]

#39782: Add keyword to list compatible graphical environments (X11, Quartz,
Wayland)?
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  Reporter:  c.herbig@…   |      Owner:  macports-tickets@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:
Resolution:               |   Keywords:
      Port:               |
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Comment (by c.herbig@…):

 Replying to [comment:4 larryv@…]:
 > Does gnumeric actually build differently depending on whether gtk is
 built +quartz or +x11? It is not acceptable for `port install FOO` to
 produce different results based solely on whether a dependency BAR is
 installed +baz or -quux or anything.
 I don't think so, I thought that gtk was supposed to handle all of the
 compatibility backends (except OpenGL).

 > The variants should not do nothing. They should check for the presence
 or absence of the relevant dependencies’ variants, as I described above.
 I agree, it would be very silly to have a a variant that does nothing, but
 is only there to advertise that the port is capable of being run in a
 +quartz environment.

 > If gnome-chemistry-utils requires its dependencies to be built as
 -quartz, it should use active_variants-1.1 to enforce this.
 I didn't know you could do that, I might look at it more later.

 > Given that one can (sort of) enforce variant selection on dependencies,
 I don’t see how a new Portfile option meaningfully changes the situation
 here.
 Perhaps I am not expressing myself correctly.
 The idea was not to create a keyword to modify the configuring or building
 process, it was simply to make a tag that could show up via port info
 portname that would list the graphical environments the port is known to
 work with; nothing more than a way to advertise to the user.

-- 
Ticket URL: <https://trac.macports.org/ticket/39782#comment:5>
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