[oe] Trouble creating virtual library provider package..

[Rob Kramer]

Hi all,

How would I go about if I'd like to have two packages that provide the same
thing? For example, I have package freetype, and freetype-led (which has a
device-specific hack). Or ffmpeg and ffmpeg-minimal (which builds the
smallest possible libavcodec/format). The right package is selected by the
image recipe, via a task. 

Is the normal way to do this to make a virtual/freetype and
PREFERRED_PROVIDER? I tried to do this, but still have trouble with double
providers etc. It gets tricky if package-name munging is involved, where
the final package is called libfreetype6_2.3.7-r4_i586.ipk, and not
freetype_2.3.7-r4_i586.ipk (and freetype-led_2.3.7-r4_i586.ipk).

If this is the right way, can someone point to a good (simple) example of a
virtual library provider?

Cheers!

    Rob