[yocto] PACKAGECONFIG and related parameters

[Diego]

Hi,

I'd like to update the glmark2 recipe:
http://git.openembedded.org/meta-openembedded/tree/meta-oe/recipes-benchmark/glmark2/glmark2_2012.12.bb
to latest upstream version.

The problem is the configure step is done with:
./waf configure --with-flavors=x11-gl,x11-glesv2
instead of the previous release's syntax:
./waf configure --enable-gl --enable-glesv2
Unfortunately:
./waf configure --with-flavors=x11-gl --with-flavors=x11-glesv2
is not an accepted syntax.

How can I express the PACKAGECONFIG[...] parameters, so that if both gl and 
gles2 are present I obtain "--with-flavors=x11-gl,x11-glesv2" as the configure 
parameter?

Thanks,
Diego