Jacques Greindl <jgreindl@xxxxxxxxx> writes: > This is probably a newby question but I can't find the anwser ... > > I have 2 files : a.new & a.old > a.new : compiled today > a.old : compiled some years ago, on another system > > jack@cixci:/$ file a.new > a.new: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), > dynamically linked (uses shared libs), for GNU/Linux 2.6.15, not > stripped > jack@cixci:/$ file a.old > a.old: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), > dynamically linked (uses shared libs), for GNU/Linux 2.0.0, not > stripped > > Is there a way to build again the same "a.old" --> on my actual > system, build the program for the old system ? It is possible in principle by essentially setting up a little version of the old system, with the old compiler, binutils, and glibc, all properly configured and built to work together. It's a fair bit of work, though. There is no simple way to do it. This of course assumes that you have the original source code. At least, that is what it would take to build the exact same a.old, with the same resulting bytes. If you have a looser meaning of "same" than perhaps a simpler procedure would be possible. Ian
