s_audio_jack.c:247: warning: implicit declaration of function 'jack_set_error_function' s_audio_jack.c:257: warning: implicit declaration of function 'jack_set_sample_rate_callback' s_audio_jack.c:257: error: 'jack_srate' undeclared (first use in this function) s_audio_jack.c:265: warning: implicit declaration of function 'jack_on_shutdown' s_audio_jack.c:268: error: 'input_port' undeclared (first use in this function) s_audio_jack.c:269: error: 'output_port' undeclared (first use in this function) s_audio_jack.c:280: warning: implicit declaration of function 'jack_get_sample_rate' s_audio_jack.c:287: warning: implicit declaration of function 'jack_port_register' s_audio_jack.c:287: error: 'JACK_DEFAULT_AUDIO_TYPE' undeclared (first use in this function) s_audio_jack.c:287: error: 'JackPortIsInput' undeclared (first use in this function) s_audio_jack.c:292: error: 'JackPortIsOutput' undeclared (first use in this function) s_audio_jack.c:299: warning: implicit declaration of function 'jack_activate' s_audio_jack.c:310: warning: implicit declaration of function 'pthread_mutex_init' s_audio_jack.c:311: warning: implicit declaration of function 'pthread_cond_init' s_audio_jack.c: In function 'jack_send_dacs': s_audio_jack.c:331: error: 'jack_client' undeclared (first use in this function) s_audio_jack.c:339: error: 'jack_filled' undeclared (first use in this function) s_audio_jack.c:339: error: 'jack_out_max' undeclared (first use in this function) s_audio_jack.c:340: warning: implicit declaration of function 'pthread_cond_wait' make: *** [s_audio_jack.o] Error 1