[질문] 서보 블라스터 까는 중인데 설치가 안된다. 왜 이런거냐

gcc -Wall -g -O2 -L/opt/vc/lib -I/opt/vc/include -o servod servod.c mailbox.c -lm -lbcm_host

servod.c: In function ‘get_model_and_revision’:

servod.c:994:6: warning: implicit declaration of function ‘bcm_host_is_model_pi4’; did you mean ‘bcm_host_deinit’? [-Wimplicit-function-declaration]

if (bcm_host_is_model_pi4()) {

^~~~~~~~~~~~~~~~~~~~~

bcm_host_deinit

servod.c: In function ‘main’:

servod.c:1383:19: warning: implicit declaration of function ‘bcm_host_get_model_type’; did you mean ‘bcm_host_get_sdram_address’? [-Wimplicit-function-declaration]

int bcm_model = bcm_host_get_model_type();

^~~~~~~~~~~~~~~~~~~~~~~

bcm_host_get_sdram_address

/usr/bin/ld: /tmp/ccTGda9C.o: in function `get_model_and_revision':

/home/pi/PiBits/ServoBlaster/user/servod.c:994: undefined reference to `bcm_host_is_model_pi4'

/usr/bin/ld: /tmp/ccTGda9C.o: in function `main':

/home/pi/PiBits/ServoBlaster/user/servod.c:1383: undefined reference to `bcm_host_get_model_type'

collect2: error: ld returned 1 exit status

make: *** [Makefile:6: servod] 오류 1

pi@raspberrypi:~/PiBits/ServoBlaster/user $ make servod

'gcc -Wall -g -O2 -L/opt/vc/lib -I/opt/vc/include -o servod servod.c mailbox.c -lm -lbcm_host