On Tue, Oct 18, 2016 at 2:09 PM, Zefir Kurtisi <zefir.kurt...@neratec.com> wrote: > > Hi, > > to those understanding the package dependency logic by heart, I'm trying to > achieve something I assumed to be common, but fail to get there with the help > of > the available documentation. > > The short version is this: > * package A has an optional feature X provided by package B > * package B is optional (feeds package) > => feature X should be selectable only if B is installed and selected > * if feature X is activated, package A depends from package B > > I did: > 1) in Config.in of package A add > config WITH_FEATURE_X > bool > depends on PACKAGE_B > prompt "Enable feature X" > default n > > 2) in Makefile of package A add > DEPENDS += +WITH_FEATURE_X:B Why not just do DEPENDS+=+PACKAGE_B:B ? This has the semantic that package A depends on B, only if it was selected by some other package.
There are other depends like this PACKAGE_x around. You could then drop WITH_FEATURE_X config option in A If you need to add any other CFLAGS or LDFLAGS in A, you can just do ifeq ($(CONFIG_PACKAGE_B),y) CFLAGS+= LDFLAGS+= etc endif I hope I understood correctly what you want to do. > > > With those changes, build fails due to recursive dependencies, because > - symbol PACKAGE_B is selected by WITH_FEATURE_X > - symbol WITH_FEATURE_X depends on PACKAGE_B > > If I leave out the additional line in Makefile of A and in menu select > WITH_FEATURE_X, the build of A fails with missing dependency to package B. > > If I leave out the 'depends on PACKAGE_B' line in Config.in, I can select > WITH_FEATURE_X without package B even being installed, which obviously fails > building. > > > Is this doable out of the box? What am I missing? > > BTW, this is about SNMP agentx support for lldpd. > > > Cheers, > Zefir > > > _______________________________________________ > Lede-dev mailing list > Lede-dev@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/lede-dev _______________________________________________ Lede-dev mailing list Lede-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/lede-dev
