In file included from /in/driver/main.c:9:
/in/dlist.h:84:9: error: implicit declaration of function 'rand48' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        return rand48()%3-1;
               ^
/in/dlist.h:84:9: note: did you mean 'rand'?
/usr/include/stdlib.h:453:12: note: 'rand' declared here
extern int rand (void) __THROW;
           ^
1 error generated.
In file included from /in/dlist.c:5:
/in/dlist.h:84:9: error: implicit declaration of function 'rand48' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        return rand48()%3-1;
               ^
/in/dlist.h:84:9: note: did you mean 'rand'?
/usr/include/stdlib.h:453:12: note: 'rand' declared here
extern int rand (void) __THROW;
           ^
1 error generated.