In file included from /in/driver/main.c:9:
/in/dlist.h:83:12: error: unused function 'comp_rand' [-Werror,-Wunused-function]
static int comp_rand(const void *a, const void *b){
           ^
/in/dlist.h:87:12: error: unused function 'comp_inc_str' [-Werror,-Wunused-function]
static int comp_inc_str(const void *a, const void *b){
           ^
/in/dlist.h:91:12: error: unused function 'comp_dec_str' [-Werror,-Wunused-function]
static int comp_dec_str(const void *a, const void *b){
           ^
/in/dlist.h:95:12: error: unused function 'comp_inc_int' [-Werror,-Wunused-function]
static int comp_inc_int(const void *a, const void *b){
           ^
/in/dlist.h:99:12: error: unused function 'comp_dec_int' [-Werror,-Wunused-function]
static int comp_dec_int(const void *a, const void *b){
           ^
/in/dlist.h:103:12: error: unused function 'comp_inc_double' [-Werror,-Wunused-function]
static int comp_inc_double(const void *a, const void *b){
           ^
/in/dlist.h:107:12: error: unused function 'comp_dec_double' [-Werror,-Wunused-function]
static int comp_dec_double(const void *a, const void *b){
           ^
7 errors generated.