When do you #include <stdlib.h>?

[Doug Gwyn]

In article <1035 at mcgill-vision.UUCP> mouse at mcgill-vision.UUCP (der Mouse) writes:
-> If you didn't want to include <stdlib>, you could [have] done the
-> prototype yourself:
-> long atol();
->   or if you are blessed with an ANSI compiler
-> long atol(char *str);
-Unless, of course, what stdlib.h actually says is
-#define atol(s) _builtin_atol(s)

No, there must also be an actual atol() function in the ANSI C library.