Just letting the list know there is a meta-amb project that is a bit
more advanced than the current recipe inside meta-agl in that it has
packages broken out... There's still some work to be done to enable amb
features via PKGCONFIG[foo], but I think it's a good start.
meta-agl has some not-yet-upstreamed patches, which you can still carry
with a bbappend recipe.
I'm about to start a personal project that will use it, so testing of the
layer is still immature, but should improve.
 - https://github.com/tripzero/meta-amb