Re: [gentoo-dev] Destroying dependancies...

[Per Wigren]

On Friday 28 March 2003 19:12, Matt Tucker wrote:
> -- Per Wigren <wigren@××××.se> spake thusly:
> > But how do we check that with the current information?
> > To use the postfix-case above as an example..
> > Postfix works fine with both MySQL v3.x and MySQL v4.x.
> > If it is compiled against v3 it has to be recompiled if MySQL is
> > upgraded from  v3 to v4, but not if it is upgraded from v4.0.11 to
> > v4.0.12..
> >
> > To use MPlayer as another example..
> > MPlayer has to be recompiled EVERY TIME that DirectFB is upgraded,
> > even minor  version, because it links to .so.<complete versionnumber>
> > ..  But it doesn't  need to be recompiled if for example Vorbis is
> > upgraded from v1.0.1 to v1.0.2  or even v1.8.5 because it links to
> > libvorbis.so.0 ...
>
> Those may be two different answers. In the case of MySQL, perhaps 4.0
> should've been a different slot? In the case of MPlayer, clearly
> portage needs a new feature which allows either MPlayer or DirectFB to
> specify that a recompile needs to happen when DirectFB is upgraded.
>
> Perhaps it would make more sense for it to be specified in the
> dependancy, because that would allow MySQL 4.0 to specify the same
> thing. Of course, you'd need to base it on version:
>
>     RECOMPILE_DEPENDS="<DirectFB-${PV}"     or
>     RECOMPILE_DEPENDS="*"
>
>     RECOMPILE_DEPENDS="<MySQL-4.0"

I still don't get how that would work.. I also think that would make room for 
a lot of human mistakes..

The easiest way must be to run "ldd" on all executables and "*.so*" on 
install-time and put the dependancies in a LIBDEPS-file..
When uninstalling/upgrading, check for "*.so*" that will be removed and "grep 
libfile.so.0 /var/db/pkg/*/*/LIBDEPS" and mark them for recompilation...

// Per Wigren

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