Re: [gentoo-dev] GTK und GTK2 Use Flag

[Brian Harring]

On Tue, Mar 29, 2005 at 12:35:38PM +0100, David Morgan wrote:
> On 13:24 Tue 29 Mar     , Diego Flameeyes Petten? wrote:
> > On Tuesday 29 March 2005 13:11, Stefan Sperling wrote:
> > > On Tue, Mar 29, 2005 at 01:04:13PM +0200, Diego Flameeyes Petten? wrote:
> > > > -gtk +gtk2 is a no-op.
> > > why?
> > As Brian said, gtk2 depends on gtk.
> > Just as a practical example, take ethereal, which could be built without gui
> > support, just using tethereal.
> > If you build it with -gtk +gtk2, it will build tethereal, not ethereal. I
> > submitted some time ago a patch to make this a more logical behaviour, but I
> > needed to change it to suit the same behaviour of other packages. See bug
> > #81055.
> >
> > Take also amule which you can find on bugzilla as an example, which can be
> > built without gtk support, and on which gtk2 support depends on gtk.
> >
> > Or wxGTK in which +wxnogtk flag is used to disable gtk1 support (there's gtk2
> > flag but no gtk flag).
> >
> > I still think this is illogical, but I can't do much on this.
> >
>
> What if I want things to be built without gtk where ever possible, but I
> want things that have to use either gtk1 or gtk2 to use gtk2?
>
> Under the current method this is what -gtk gtk2 should do,
Actually, no.  And that is why the gtk flags need changing. :)
current setup.
gtk  ~= gtk support AND fall back to gtk v1 support.
gtk2 ~= use gtk v2 support in preference to v1 if available.

There is no way to state, "I want v2, and _only_ v2" without resorting 
to a package.mask'ing of gtk-1*.

> since
> something that has to use gtk won't have a gtk flag, but if there's a
> choice between gtk1 and gtk2, it should have a gtk2 flag.
>
> I don't see how this would be possible under ferringb's scheme,
my scheme- gtk == *any* version, the user doesn't care.
gtk{1,2,3} == use that version.

So... if you had USE="gtk2 and gtk3", ebuilds would use v3 if 
possible, otherwise v2.  No gtk v1.

If you had USE="gtk gtk2", you prefer gtk v2., but will use what is 
available (any version).

> so I
> prefer the current way (though if ferringb's way of doing it could be
> modified to do this without getting too ugly I'd be just as happy with
> that).
The current scheme sucks for those who want a gtk v2 only system.  How 
do you specify gtk v2 only under the current system using _just_ use 
flags?  You don't. :)
~brian
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