Split building

[Alexander Neundorf]

On Monday 07 January 2008, Piotr Jaroszyński wrote:
> On Monday 07 of January 2008 20:26:58 Alexander Neundorf wrote:
> > > Rebuilding libs for each package is not an option as Gentoo is a source
> > > based distributions, users would kill us :) Unpacking more stuff won't
> > > hurt as far as we don't build everything over and over again. Would it
> > > be possible to only build the package in question but make CMake use
> > > the targets it doesn't build (e.g. konq in the kdepasswd case)?
> >
> > It is possible to "fake" that these library targets exist.
> > If you build e.g. complete kdebase, you will see that the CMakeCache.txt
> > contains a
> > foo_LIB_DEPENDS:STATIC=jpeg;png;
> > for every library target, e.g. a konq_LIB_DEPENDS.
> > As soon as cmake now detects the "konq" in the arguments for
> > TARGET_LINK_LIBRARIES() it checks of the variable konq_LIB_DEPENDS exists
> > and uses its contents for linking.
> > This means if you manage to get konq_LIB_DEPENDS set correctly when
> > building the kcm it will link to everything it needs.
> >
> > There are two ways:
> > You could do something like
> > grep konq_LIB_DEPENDS kdebase-full-build/CMakeCache.txt >>
> > kdebase-kdepassword-build/CMakeCache.txt
> > This will put the variable directly into the cache.
> >
> > Or you can create a cmake script something like this as e.g.
> > libdeps.cmake: set(konq_LIB_DEPENDS jpeg;png CACHE STRING "deps")
> > and then preload it into cmake:
> > cmake -C libdeps.cmake <all other options>
> >
> > Does this help ?
>
> Definitely.
>
> > P.S. This file can also be created automatically by using
> > EXPORT_LIBRARY_DEPENDENCIES(), but currently this isn't done in kdebase,
> > since usually the libs from kdebase are no public interface, i.e. usually
> > there is no need to link external apps to these libs.
>
> This looks really promising, just did a simple test and e.g. for split
> libkonq build I get:
> SET(konq_LIB_DEPENDS ... )
> SET(konq_sound_LIB_DEPENDS ... )
> SET(kded_favicons_LIB_DEPENDS ... )
>
> All (or select) split packages could append to one file with deps and also
> include it(or its copy) at the same time. Shouldn't that work?

Sorry, I don't understand.
Can you please explain, what exactly are you doing ?

Alex