svn commit: branches/uClibc-nptl: ldso/include ldso/ldso libc/misc/pthread etc...

[Joakim Tjernlund]

> 
> On Sun, 15 Jan 2006, Joakim Tjernlund wrote:
> 
> >  >
> > > I have converted almost all weak_alias to strong_alias. 
> > > My idea is to mark with weak_alias only those that really 
> are needed 
> > > to be overwritten by any other (stronger) from another lib. Could 
> > > you please provide the list of functions that nptl needs 
> weak within 
> > > libc?
> > > 
> > > Jocke: will this be handled correctly by ldso, or it will 
> load the 
> > > first found version (e.g the one in libc, despite the weak) ?
> > > 
> > > Thanks, Peter
> > 
> > ldso will use the one it finds first, weak or strong does 
> not matter.
> 
> which will be the first in case the app has DT_NEEDED for 
> libc.so/libpthread.so, libc.so/ld.so (nptl uses maybe some 
> combination w/ librt.so as well)

libs will be loaded in the order they appear in the apps DT_NEEDED list. Here
will libc be the last one and phtread will be before libc.

A little more info about shared libs and load order can be found here:
http://www.caldera.com/developers/gabi/2003-12-17/ch5.dynamic.html#shobj_dependencies

 Jocke