Hi!

While trying to convert devel/allegro to the options
framework, I stumbled over the following problem:
Its bl3.mk file has contains
.if !empty(USE_ESOUND:M[Yy][Ee][Ss])
.  include "../../audio/esound/buildlink3.mk"
.endif
which should be convert to match against the PKG_OPTIONS
of the (to-be-) installed package.

How should this be done?

 Thomas