On Fri, Nov 5, 2021 at 3:25 PM Maxim Sloyko via lists.openembedded.org <[email protected]> wrote: > > Hi all, > > Posting this to openembedded-core, as it was suggested to me. > > The recipe that I'm working on for our system (let's call it A) has a > dependency on a certain feature being enabled in another package (B). > So, in B, we have: > > PACKAGECONFIG[nice-feature] = "..." > > and my recipe (or rather, the tool built by the recipe), needs that > feature to be enabled to work properly. What's worse, is that this is > a runtime dependency, so if somebody just forgets to enable that > feature, the image will build fine, but the tool won't work. I would > like this to be a build time failure. > > My plan is to change recipe A, so that if the "nice-feature" is > enabled, the package will PROVIDE one more thing: > > PROVIDES += "${PN}-nice-feature" > > and in my recipe B, I'll declare this as a dependency: > > RDEPENDS:${PN} += "package-a-nice-feature".
You're doing that just to generate a build time error if the two recipe's configurations are not consistent? The normal approach would be to define a global variable (e.g. a distro feature) which both recipes can check and use to configure themselves appropriately. > Now I'm thinking, wouldn't it be great if package A could specify > extra PROVIDES when the feature is configured? This would be similar > to the way it's done for package's R?DEPENDS: > > PACKAGECONFIG ??= "f1 f2 f3 ..." > PACKAGECONFIG[f1] = "\ > --with-f1, \ > --without-f1, \ > build-deps-for-f1, \ > runtime-deps-for-f1, \ > runtime-recommends-for-f1, \ > packageconfig-conflicts-for-f1 \ > provides-for-f1 \ > " > > The last line would be a change that I propose. It looks like it would > be relatively easy to implement this in base.bbclass > > What do you think? Will this be useful? Did I miss an existing way to do this? > > Thanks, > > -- > -MS > > >
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