[OpenWrt-Devel] build: conditional dependencies in packages sharing the same source

[Eyal Birger]

Hi All,

We've encountered an interesting behavior in the OpenWRT build system, on which
feedback would be appreciated:

When building packages sharing the same source code, all packages
prerequisites seem to
be joined unconditionally, instead of each prerequisite depending on
the package that required
it.

As an example:

ppp-mod-pppoa shares its source code with the ppp package;
ppp-mod-pppoa depends on linux-atm;
as a result, ppp depends unconditionally on linux-atm.

i.e. in the generated tmp/.packagedeps file, the following is generated:

$(curdir)/ppp/compile += ... $(curdir)/linux-atm/compile ...

And not:

$(curdir)/ppp/compile += ... $(if
$(CONFIG_ppp-mod-pppoa),$(curdir)/linux-atm/compile) ...

This results in unnecessary compilation dependencies.

Is this behavior intentional?

Best regards,
Eyal.
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