search for: snd_ctl_elem_info_is_us

...alsactl make[1]: Entering directory `/usr/src/alsa-utils-1.0.11rc2/alsactl' gcc -g -O2 -o alsactl alsactl.o state.o power.o names.o -lasound -lm -ldl -lpthread state.o(.text+0x53b): In function `get_control': /usr/src/alsa-utils-1.0.11rc2/alsactl/state.c:185: undefined reference to `snd_ctl_elem_info_is_user' state.o(.text+0x1b3c): In function `add_user_control': /usr/src/alsa-utils-1.0.11rc2/alsactl/state.c:724: undefined reference to `snd_ctl_elem_add_boolean' state.o(.text+0x1b54):/usr/src/alsa-utils-1.0.11rc2/alsactl/state.c:727: undefined reference to `snd_ctl_elem_add_iec958'...