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From: Phil Blundell <philb@gnu.org>
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Subject: Re: [PATCH] xserver-xorg: remove broken RREPLACES
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On Fri, 2012-09-14 at 17:28 -0500, Mark Hatle wrote:
> Based on that, I'm not sure what RREPLACES is being used for:
> 
> FILES_${PN} = "${bindir} ${libdir}/X11/Options ${libdir}/X11/Cards 
> ${libdir}/X11/getconfig ${libdir}/X11/etc ${libdir}/modules/*.so 
> ${libdir}/xorg/modules/*.so /etc/X11 ${libdir}/xorg/protocol.txt 
> ${datadir}/X11/xorg.conf.d"
> 
> Since under the packaging rules, that one file will only exist in the one 
> package, and it won't ever exist in both packages.
> 
> So Replaces is wrong under either definition from what I can tell.

The point is that it was in older versions of xserver-xorg.  It's indeed
not in the current version, and in fact it can't be since (due to the
way that FILES works) there is no way for a single file to end up in
more than one of the PACKAGES for a given recipe.

In the particular case at hand I think the problem is relatively minor,
since folks who have an old xserver-xorg installed can upgrade by first
installing the new xserver-xorg (which doesn't ship libexa.so) and then
installing xserver-xorg-module-exa.  But, if the new xserver-xorg had
depended on xserver-xorg-module-exa then this wouldn't have worked
without the RREPLACES.

p.