On Tue, 16 Aug 2016, Ulf Magnusson wrote: > On Tue, Aug 16, 2016 at 4:02 PM, Robert P. J. Day <rpj...@crashcourse.ca> > wrote: > > > > was about to submit a small number of patches to clean up redundancy > > when people combine "_append" with "+=" (because it offends my > > delicate sensibilities), and ran across this in oe-core, > > unfs3_0.9.22.r497.bb: > > > > DEPENDS_append_class-nativesdk += "flex-nativesdk" > > > > uh, what? > > > > most of the time, i assume the above doesn't hurt, it's just ... > > silly. but normally, with "_append", you *need* to add the leading > > space explicitly, and that's not being done above. so does that mean > > that combining "_append" with "+=" *does* generate a leading space? > > that just makes my head hurt -- the possibility that "_append" is > > being used in a way that normally makes it fail, only to have "+=" > > step in and save the day. at which point "_append" saves processing > > that until the end of parsing? yeesh. > > > > thoughts? > > By the point the += is handled, the override won't have been interpreted > yet. My guess is that += fetches the value of the variable > "DEPENDS_append_class-nativesdk", gets back the empty string, and > adds a space followed by "flex-nativesdk" to that. > > The resulting " flex-nativesdk" is then interpreted as usual when the > overrides are handled. > > You might like the note I added to > https://www.yoctoproject.org/docs/2.2/bitbake-user-manual/bitbake-user-manual.html#override-style-operation-advantages > by the way. :)
that note is pretty much what i've been whining about for a long time. :-) in any event, when one sees something like the above: DEPENDS_append_class-nativesdk += "flex-nativesdk" what is the *proper* cleanup? rday -- ======================================================================== Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ======================================================================== -- _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core