Remove support for legacy SGI IRIX

lib/isc/unix/file.c

@@ -198,9 +198,7 @@ isc_file_settime(const char *file, isc_time_t *when) {
 
 	/*
 	 * isc_time_nanoseconds guarantees a value that divided by 1000 will
-	 * fit into the minimum possible size tv_usec field.  Unfortunately,
-	 * we don't know what that type is so can't cast directly ... but
-	 * we can at least cast to signed so the IRIX compiler shuts up.
+	 * fit into the minimum possible size tv_usec field.
 	 */
 	times[0].tv_usec = times[1].tv_usec =
 		(int32_t)(isc_time_nanoseconds(when) / 1000);

lib/isc/unix/ifiter_sysctl.c

@@ -29,14 +29,8 @@
 #include <isc/print.h>
 
 /* XXX what about Alpha? */
-#ifdef sgi
-#define ROUNDUP(a) ((a) > 0 ? \
-		(1 + (((a) - 1) | (sizeof(__uint64_t) - 1))) : \
-		sizeof(__uint64_t))
-#else
 #define ROUNDUP(a) ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) \
 		    : sizeof(long))
-#endif
 
 #define IFITER_MAGIC		ISC_MAGIC('I', 'F', 'I', 'S')
 #define VALID_IFITER(t)		ISC_MAGIC_VALID(t, IFITER_MAGIC)
@@ -218,18 +212,10 @@ internal_current(isc_interfaceiter_t *iter) {
 #ifdef ISC_PLATFORM_HAVESALEN
 			sa = (struct sockaddr *)((char*)(sa)
 					 + ROUNDUP(sa->sa_len));
-#else
-#ifdef sgi
-			/*
-			 * Do as the contributed SGI code does.
-			 */
-			sa = (struct sockaddr *)((char*)(sa)
-					 + ROUNDUP(_FAKE_SA_LEN_DST(sa)));
 #else
 			/* XXX untested. */
 			sa = (struct sockaddr *)((char*)(sa)
 					 + ROUNDUP(sizeof(struct sockaddr)));
-#endif
 #endif
 		}