Hi! somebody can give me a light? I have the following piece of code #include <sys/ipc.h> ... shmid = shmget(IPC_PRIVATE, len, SHM_R | SHM_W); if (shmid == -1) { printf("can't get shared memory\n"); exit(1); } state = (struct state *)shmat(shmid, 0, 0); if (!state || state == (struct state *)-1) { printf("can't attach to shared memory\n"); exit(1); } shmctl(shmid, IPC_RMID, 0); the compiler gives me warning of implicit declaration at the end, these 3 functions doesn't link against libroot Why? Atenciosamente, Michael Vinícius de Oliveira ____________________________________________________________________________________ Veja quais são os assuntos do momento no Yahoo! +Buscados http://br.maisbuscados.yahoo.com