Hi I hope that this is not a question that some FAQ answers, but if it is then I could not find it! I need a version of pthreads that is built with GS segment addressing rather than stack-pointer arithmetic to find pthread-specific state (I understand that glibc 2.2.4 on RedHat is build with this by default for instance). Currently I am running debian testing, kernel version 2.4.18 with glibc 2.2.5-11.1 on a Pentium 4. TIA Richard Jones