-#ifdef INITGROUPS_HEADER
-#include INITGROUPS_HEADER
-#else
-/* On AIX 4.1, initgroups() is defined and even documented (giving the parameter
- types as char* and int), but doesn't have a prototype in any of the system
- header files. AIX 4.3, SunOS 4.1.3, and ULTRIX 4.2A have the same
- problem. */
-extern int initgroups(char*, int);
-#endif
+/* Hopefully, grp.h declares initgroups(). If we run into a platform
+ where it doesn't, we could consider declaring it here as well. */
+#include <grp.h>