Re: [gentoo-dev] question on writing ebuilds with exclusive dependencies.

[Sami Näätänen]

On Wednesday 07 April 2004 20:26, Paul de Vrieze wrote:
> On Wednesday 07 April 2004 22:23, Marius Mauch wrote:
> > On 04/07/04  Paul de Vrieze wrote:
> > > Unfortunately it is not. It will depend on both libraries if both
> > > useflags are present. The best approach probably is:
> > > DEPEND="imagemagick? ( libgd? ( media-libs/libgd ) :
> > > media-gfx/imagemagick ) :
> > >         ( media-libgs/libgd? )"
> >
> > Except that Nick doesn't like the "foo? ( bar : bla )" syntax and
> > therefore it's likely to get deprecated/dropped soon. Instead
> > better use "foo? ( bar ) !foo? ( bla )"
>
> You're right. This should be straightforward. I leave it up to the
> reader to rewrite it.

Also the debug use flag should be used to select between the two 
packages as the ebuild itself uses the imageMagick when making debug 
version

So this should be used if the debug use flag is stronger dependecy 
controller than libgd use flag:

DEPEND="imagemagick? (
	  libgd? (
	    debug?( media-gfx/imagemagick )
	    !debug? ( media-libs/libgd )
	  )
	  !libgd? ( media-gfx/imagemagick )
	)
	libgd? (
	  debug? ( media-gfx/imagemagick )
	  !debug? ( media-libs/libgd )
	)
	!libgd? (
	  !imagemagick? (
	    debug? ( media-gfx/imagemagick )
	    !debug? ( media-libs/libgd )
	  )
	)"

This one is the opposite: ie if libgd is used debugging is not 
considered att all, which in my opinion is wrong.
I think that the debugging shouldn't be the desiding factor when the 
other use flags are used, because then I can't debug the software at 
all with the libgd.

DEPEND="imagemagick? (
	  libgd? ( media-libs/libgd )
	  !libgd? ( media-gfx/imagemagick )
	)
	libgd? ( media-libs/libgd )
	!libgd? (
	  !imagemagick? (
	    debug? ( media-gfx/imagemagick )
	    !debug? ( media-libs/libgd )
	  )
	)"


The first version matches with the ebuild he submitted (I think :)

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