Duplication is bad. You should already be getting sysdeps/unix/sysv/linux/wordsize-64/syscalls.list by virtue of sysdeps/unix/sysv/linux/x86_64/Implies. The llseek line shouldn't make a difference if there is already an llseek.? source file in a higher-priority sysdeps directory. So why do you need this file at all? Thanks, Roland