On Sun, Mar 27, 2011 at 1:08 PM, Khem Raj <[email protected]> wrote: > I observed that if I have > DEPENDS = "a b" in recipe.bb which has BBCLASSEXTEND = "native" > then dependecies for recipe-native shows a-native b-native so far so > good > > Now if I want to add a dependency which only is needed for native recipe > I do > > DEPENDS_virtclass-native += "c-native" > > what this does is it will ignore a-native and b-native dependencies and > only adds "c-native" to depends of native recipe > > DEPENDS_virtclass-native_append = " c-native" > > This does what I wanted i.e. have deps on a-native b-native c-native > > I think behavior of += or _append should be similar. Is my understanding > correct ?
They've never been the same. += is immediate, _append is delayed. If a class, say, native.bbclass, defines the variable with ?=, and you used += before the inherit, then it will have a value, and the ?= won't assign. I assume native.bbclass does it this way today so you can override the automatic behavior by defining the variable yourself, but I'll let Richard speak to that decision. -- Christopher Larson clarson at kergoth dot com Founder - BitBake, OpenEmbedded, OpenZaurus Maintainer - Tslib Senior Software Engineer, Mentor Graphics _______________________________________________ Openembedded-core mailing list [email protected] http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
