[oe] Adding support for DirectFB across the board

[Richard Purdie]

On Sun, 2007-09-23 at 15:20 -0400, shanevolpe at gmail.com wrote:
> I have been adding in support for directFB to as many packages as
> possible, however one issue I have ran into several times is what do I
> do when there are packages that can be compiled with X11 or directfb
> support and then what do you do with packages that may depend on a
> package compiled with directfb or X11.  Ok that was pretty confusing,
> let me give an example.
> 
> I have added cairo-directfb which compiles cairo with directfb instead
> of X11.  Next I wanted to add (update) gtk+-directfb to use
> cairo-directfb instead of cairo.  That part was easy I just changed
> the DEPENDS cairo in gtk+-directfb to cairo-directfb..  The issue came
> when I noticed that gtk+ also requires pango which requires cairo so
> what do I do here, do I make a new pango called pango-directfb?  It
> seems like the better thing would be set up a virtual/cairo and set it
> to either cairo or cairo-directfb.  If I go that route how do I set it
> up so it does not break everyone's build that does not have
> virtual/cairo set, is there a way to default it to something like
> cairo?

The thing you need to consider is that pango compiled with a standard
cairo is a different package to pango compiled with cairo-directfb.

The virtual namespace is used to show things that are equivalent and
pango is different to pango-directfb since I couldn't interchange them.

You therefore need to create a pango-directfb, ugly as that may be (.inc
files can minimise the ugliness though).

Cheers,

Richard