[arch-general] Installing packages with different glibc

[Baho Utot]

On Wed, 2009-06-10 at 23:49 -0300, Gerardo Exequiel Pozzi wrote:
> Baho Utot wrote:
> > Does it create complications if I install packages built with a newer
> > glibc-2.10.1-2 on a system with an older glibc-2.9-7?
> >   
> Yes and no. Depending if the executable or library that is linked to
> glibc uses a symbol with declaring what version use via ELF versioning.
> You obtain it with a simple "readelf -s /path/to/executable | grep
> @GLIBC_2.10".
> 
> Do this "readelf -s /lib/libc.so.6 | grep @GLIBC_2.10" and get an idea
> of the minimal  functions that are only in version 2.10 ;)
> 
> And for threaded programs /lib/libpthread-2.10.1.so, but don't worry
> about this at this time.
> 
> > According to LFS they say if you chnage glibc you should rebuilt all the
> > installed packages with the newer glibc.
> >   
> Not at all as you can see :)
> 
> > Does this hold true for Arch?
> >   
> I doubt at this time. But later when the programs use specific features
> of this version, for example malloc_info () fallocate (), yes.
> 
> 
> If you are interested in these topics, can read a good paper from Ulrich
> Drepper [#1]
> 
> 
> Good Luck!
> 
> 
> [#1] http://people.redhat.com/drepper/dsohowto.pdf
> 

Ok more reading to do :)

Thanks