Bug 32827

Summary:	Tidy up Libs in .pc file and add -uninstalled.pc version
Product:	dbus	Reporter:	Simon McVittie <smcv>
Component:	core	Assignee:	Simon McVittie <smcv>
Status:	RESOLVED FIXED	QA Contact:	John (J5) Palmieri <johnp>
Severity:	enhancement
Priority:	medium	CC:	hp, mikhail.zabaluev, walters
Version:	1.4.x	Keywords:	patch
Hardware:	Other
OS:	All
URL:	http://git.collabora.co.uk/?p=user/smcv/dbus-smcv.git;a=shortlog;h=refs/heads/uninstalled
Whiteboard:
i915 platform:		i915 features:
Bug Depends on:
Bug Blocks:	36074, 36164
Attachments:	dbus-1.pc.in: move -lpthread, -lrt, Winsock to Libs.private Add dbus-1-uninstalled.pc.in

Description Simon McVittie 2011-01-04 11:17:43 UTC

Created attachment 41637 [details] [review]
dbus-1.pc.in: move -lpthread, -lrt, Winsock to Libs.private

dbus-1.pc.in has libpthread, librt and/or Winsock in its Libs, whereas they should be in Libs.private:

"Private libraries  are  libraries  which  are  not  exposed through your
library, but are needed in the case of static linking" -- pkg-config(1)

Meanwhile, it'd be nice for developers if there was an uninstalled version of the .pc file so you can link against an uninstalled copy of libdbus; see http://smcv.pseudorandom.co.uk/2008/09/pc-uninstalled/ for more about that.

Comment 1 Simon McVittie 2011-01-04 11:18:46 UTC

Created attachment 41638 [details] [review]
Add dbus-1-uninstalled.pc.in

Comment 2 Simon McVittie 2011-03-03 07:33:28 UTC

*** Bug 27287 has been marked as a duplicate of this bug. ***

Comment 3 Colin Walters 2011-04-26 09:52:22 UTC

(In reply to comment #0)
> Created an attachment (id=41637) [details]
> dbus-1.pc.in: move -lpthread, -lrt, Winsock to Libs.private
> 
> dbus-1.pc.in has libpthread, librt and/or Winsock in its Libs, whereas they
> should be in Libs.private:

Hmmm, ouch.  We really should have noticed this in the first place =/

But...I'm worried about application compatibility.  It's possible that an application was building using -ldbus and was using e.g. clock_gettime() and not explicitly linking to -lrt.

Granted this is just a compilation and probably won't break existing binaries, but still I think this one is better on the 1.5 branch and not in a stable release.

Comment 4 Colin Walters 2011-04-26 09:53:49 UTC

(In reply to comment #1)
> Created an attachment (id=41638) [details]
> Add dbus-1-uninstalled.pc.in

Looks good, and thanks for the blog entry link - I never knew exactly how the -uninstalled stuff was supposed to work.

Comment 5 Simon McVittie 2011-04-26 11:22:48 UTC

(In reply to comment #3)
> But...I'm worried about application compatibility.  It's possible that an
> application was building using -ldbus and was using e.g. clock_gettime() and
> not explicitly linking to -lrt.

OK, I only applied this commit on master (for 1.5.2).

> Granted this is just a compilation and probably won't break existing binaries

It won't, pkg-config is only used at compile time.

(In reply to comment #4)
> (In reply to comment #1)
> > Created an attachment (id=41638) [details] [details]
> > Add dbus-1-uninstalled.pc.in
> 
> Looks good

Fixed in git for 1.4.10, 1.5.2. Note that because this was based on the improved .pc from the commit above, people using an uninstalled dbus *do* get the Libs.private fix - but if you're using an uninstalled copy of dbus I think it's OK to enforce stricter correctness.

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