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 -- Gerardo Exequiel Pozzi ( djgera ) http://www.djgera.com.ar KeyID: 0x1B8C330D Key fingerprint = 0CAA D5D4 CD85 4434 A219 76ED 39AB 221B 1B8C 330D