libmobile.a(mncc_sock.o): In function `mncc_sock_accept':
/home/ubuntu/Desktop/OsmocomBB/master/src/host/layer23/src/mobile/mncc_sock.c:229: undefined reference to `osmo_fd_read_disable'
libmobile.a(mncc_sock.o): In function `mncc_sock_close':
/home/ubuntu/Desktop/OsmocomBB/master/src/host/layer23/src/mobile/mncc_sock.c:95: undefined reference to `osmo_fd_read_enable'
libmobile.a(mncc_sock.o): In function `mncc_sock_write':
/home/ubuntu/Desktop/OsmocomBB/master/src/host/layer23/src/mobile/mncc_sock.c:159: undefined reference to `osmo_fd_write_disable'
/home/ubuntu/Desktop/OsmocomBB/master/src/host/layer23/src/mobile/mncc_sock.c:174: undefined reference to `osmo_fd_write_enable'
libmobile.a(mncc_sock.o): In function `mncc_sock_from_cc':
/home/ubuntu/Desktop/OsmocomBB/master/src/host/layer23/src/mobile/mncc_sock.c:75: undefined reference to `osmo_fd_write_enable'
libmobile.a(mncc_sock.o): In function `mncc_sock_write_pending':
/home/ubuntu/Desktop/OsmocomBB/master/src/host/layer23/src/mobile/mncc_sock.c:81: undefined reference to `osmo_fd_write_enable'
collect2: error: ld returned 1 exit status
Makefile:394: recipe for target 'mobile' failed
make[3]: *** [mobile] Error 1
make[3]: Leaving directory '/home/ubuntu/Desktop/OsmocomBB/master/src/host/layer23/src/mobile'
Makefile:325: recipe for target 'all-recursive' failed
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory '/home/ubuntu/Desktop/OsmocomBB/master/src/host/layer23/src'
Makefile:351: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/ubuntu/Desktop/OsmocomBB/master/src/host/layer23'
Makefile:97: recipe for target 'host/layer23/layer23' failed
make: *** [host/layer23/layer23] Error 2