On 10/19/2016 07:12 PM, Alexandru Ardelean wrote: > 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. > This would add an unconditional dependency (A depends from B when B is selected), which is maybe not desirable. I.e. you can have packages snmp and lldpd installed, but lldpd's SNMP agentx support is not mandatory. That's the idea of having WITH_FEATURE_X selectable in menu.
> 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. > Looked through all packages with Config.in menus, but did not find any with such inter-package dependencies. Maybe it is just not supported out of the box. Thanks anyway, I'll report back if I find some workaround. _______________________________________________ Lede-dev mailing list Lede-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/lede-dev
