Hi, I have the same problem. It looks like a problem with the glibc. My gdb reports: "Program receives signal SIGSEGV, Segmentation fault. 0x0ff890f4 in semctl() from lib/libc.so.6"
I tried to find out what is happening: semctl() takes three or four parameters: semctl( int semid, int semnum, int cmd, arg) where "arg" should be optional depending on the command "cmd". Problems: a) you always need four parameters, if you do not provide parameter #4 you get SIGSEGV ! int dummy; value=semctl(semaphore_id, 0, GETVAL); /* you get SIGSEGV ! */ value=semctl(semaphore_id, 0, GETVAL,&dummy); /* works */ semctl(semaphore_id, 0, IPC_RMID); /* you get SIGSEGV ! */ semctl(semaphore_id, 0, IPC_RMID, &dummy); /* works */ b) "arg" needs to be a pointer, even for commands that do not really use parameter #4 ! semctl(semaphore_id, 0, SETVAL, init_val); /* you get SIGSEGV ! */ semctl(semaphore_id, 0, SETVAL, &init_val); /* works !!! */ Using a pointer for the value in SETVAL is only a workaround ! Keep this in mind, if you are changing to a new (correct working) glibc! Cajus ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
