Hello everybody! Anybody who doesn't know how to apply diff files to an original should have a look at the man page of 'patch' for details or simply type cd patch -p1 < or: gzip -dc | patch -p1 cd patch -p1 < or: gzip -dc | patch -p1 To build GDB look into the GDB directories for further information. The same is for XXGDB. For XXGDB there is a extra README.xp3gdb about special features of this GUI for GDB. Have fun. Joerg Stippa and Thomas Br"aunl PS: When you have to get patch first, have a look for patch-2.1.tar.gz at different GNU archives. Below is the beginning of the man page of 'patch': NAME patch - apply a diff file to an original SYNOPSIS patch [options] [origfile [patchfile]] [+ [options] [orig- file]]... but usually just patch