I don't know if this is possible in an easy way. The main shared object library librdf.so of redland is linked to libpq.so and as far as I can tell, it really uses symbols from libpq.so, which is from PostgreSQL. It is not a false linkage.

Any ideas from your side? Why do we want these separated?

To me, on one hand this sounds like NOTABUG, on the other hand: does any of the programs using Redland actually USE that PostgreSQL integration?

I don't know the answer to that question.

It looks like in the new redland-1.0.9, the new PostgreSQL functionality is split into an external module: /usr/lib64/redland/librdf_storage_postgresql.so

I assume that (I haven't looked into it) the redland API remained the same for PostgreSQL but now the module is now dlopened. So if we are to split this into a subpackage, we really have to go through Kevin's question and fish out what packages are actually using this API. Those which use this API need to require the subpackage explicitly.

But I would like to know what is the gain of the split.

(In reply to comment #3)
> But I would like to know what is the gain of the split.  

I'm hunting around for spurious dependencies like this one in order to reduce the image size of live Fedora distros.

postgresql-libs is just 500KB, so no big deal in this case. It just seems weird that KDE and OpenOffice would depend on it.

(In reply to comment #4)

> I'm hunting around for spurious dependencies like this one...
>
> ...It just seems weird that KDE and OpenOffice would depend on it.    

See also bug requests 562645 and 565329..

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The split is made in rawhide (F-14). Do we need to make the split in the stable branches too, or is it to late?

I don't know. The problem is of course that users who are using that functionality will by default lose it with the update if it's split out.

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for posterity, these backends are now split out in fedora 14 redland packaging, thanks to oget for the work there.