output for make user

lib/libsensors.so: undefined reference to `sensors_scanner_exit'
lib/libsensors.so: undefined reference to `sensors_yylex'
lib/libsensors.so: undefined reference to `sensors_lex_error'
lib/libsensors.so: undefined reference to `sensors_yylineno'
lib/libsensors.so: undefined reference to `sensors_scanner_init'
collect2: ld returned 1 exit status
make: *** [prog/sensors/sensors] Error 1