static int (*plibc_func)(int (*fn)(void *), void *child_stack,
int flags, void *arg, pid_t *ptid,
struct user_desc *tls, pid_t *ctid) = NULL;
static int (*plibc_func)(int (*fn)(void *), void *child_stack,
int flags, void *arg, pid_t *ptid,
struct user_desc *tls, pid_t *ctid) = NULL;