Hi, all Now I want to use semaphores in rtlinux, but I can't install the modules of semaphores. When I entered into the directory of semaphores, then I copyed a rtl.mk to this directory and typed 'make', many errors were shown. Will you help me. And can you tell how to use the semaphores detailly. Also, I have another problem: how to use clock and rtl_sched simultaneously. Thanx Wang Heng Shandong University P.R.China 2000.9.27 -- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] --- For more information on Real-Time Linux see: http://www.rtlinux.org/rtlinux/