typedef pthread_t gl_thread_t;
# define glthread_create(THREADP, FUNC, ARG) \
(pthread_in_use () ? pthread_create (THREADP, NULL, FUNC, ARG) : ENOSYS)
typedef pthread_t gl_thread_t;
# define glthread_create(THREADP, FUNC, ARG) \
(pthread_in_use () ? pthread_create (THREADP, NULL, FUNC, ARG) : ENOSYS)