Re: Dependencies of -dev packages
On Tue, Oct 25, 2005 at 04:29:20PM +0200, Gabor Gombas wrote:
> On Mon, Oct 24, 2005 at 07:55:25PM +0200, Kurt Roeckx wrote:
>
> > > $ pkg-config --libs a
> > > -la -lb
> > ^^^
> >
> > It should not link to libb if you only request it to link to
> > liba. liba should have a DT_NEEDED for libb, and the linker
> > should find the symbols liba needs from libb itself.
>
> No. Using "Requires:" instead of "Requires.private:" means that a's API
> exposes the dependency on b
Then I guess it's either not used properly most of the time,
or hard they make it hard to use it properly.
> (for example, by directly referencing
> symbols from libb in a's header files). In this case, you _do_ need to
> link with libb explicitely, shared library dependencies won't help you.
The liba is not designed properly, it's shouldn't expose that
it's using libb.
> Extreme example: it is possible that public headers from "a" reference
> symbols from "b", but liba itself does not use any symbols from libb,
> therefore it does not depend (in the DT_NEEDED sense) on libb at all.
Which is completly broken.
Kurt
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