[Xcb] [RFC PATCHv2] New XCB socket handoff mechanism for Xlib/XCB and other libraries

Rémi Cardona remi at gentoo.org
Sun May 4 00:42:48 PDT 2008

pcpa at mandriva.com.br a écrit :
> Quoting Mikhail Gusarov <dottedmag at dottedmag.net>:
>> Twas brillig at 20:48:56 01.05.2008 UTC-04 when James Cloos did gyre 
>> and gimble:
>> JC> A lot of other binaries on my box needed rebuilding as they directly
>> JC> referenced libxcb-xlib.so.0.
>> It is bug in packaging, called 'overlinking' and usually caused by
>> installing libtool .la files. Here is one spectacular example:
>> http://lists.debian.org/debian-devel-announce/2005/11/msg00016.html

Yep, we had the same issue when expat changed ABI. Most unsuspecting 
users had to rebuild 200+ packages. Users who had been using --as-needed 
(described bellow) only had 20~30.

>   pkgconfig files installed by default build of xorg packages seens to
> be correct by using *.private, but .la files adds dependencies,
> and, as an example, applications that don't know neither use xcb, are
> linked with xcb.

Overlinking can be "fixed" by using binutil's --as-needed flag. We've 
been working on getting tree-wide support in Gentoo for this flag which 
does wonders. At first, we had a lot of breakage, but now only very few 
apps refuse to work correctly with it. I think Ubuntu is using it by 
default now too.

Gentoo's documentation : http://www.gentoo.org/proj/en/qa/asneeded.xml

Of course, that doesn't fix the issues with libtool's .la files, but for 
Xorg, you shouldn't even need to install them (except for static linking...)



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