Logged In: YES 
user_id=1254741

My test program that compiled correctly with "cc -c -g":

#include <unistd.h>
int main ()
{
 void *p = setgroups;
 return 0;
}

The definition of setgroups in <unistd.h>:
#if _SGIAPI
...
#if defined(_BSD_COMPAT)
extern int setgroups(int, int *);
#else   /* !_BSD_COMPAT */
extern int setgroups(int, const gid_t *);
#endif /* _BSD_COMPAT */
...
#endif /* _SGIAPI */

So it should catch one of these defines.