Hi, What versions of GCC support building applications with POSIX_THREAD_PRIORITY_SCHEDULING? --My cuurent version of GCC: gcc version 4.0.1 20050919 (Red Hat 4.0.1-14) Do I have to turn on something special in my linux kernel as in a preemptive versus non-preemptive kernel? -- My current OS: Fedora Core release 4 (Stentz) 2.6.13-1.1532_FC4 Is there a special flag in GCC to support POSIX_THREAD_PRIORITY_SCHEDULING? Can someone point me to some code examples? Thanks, Ernesto