Hi. I got this error messages when compiling a multithreaded server: /usr/lib/libpthreads.so: undefined reference to `machdep_sys_sendmsg' /usr/lib/libpthreads.so: undefined reference to `machdep_sys_recvmsg' I'm compiling on OpenLinux 1.3 by Caldera. What's going on here? TIA. Regards from Spain. Moises Navarro.