Index: c-lex.c
===================================================================
RCS file: /home/ncvs/src/contrib/gcc/c-lex.c,v
retrieving revision 1.4
diff -u -r1.4 c-lex.c
--- c-lex.c	11 Jul 2003 04:49:30 -0000	1.4
+++ c-lex.c	15 Jul 2003 14:29:26 -0000
@@ -299,10 +299,10 @@
     }
 
   update_header_times (new_map->to_file);
-#ifndef FREEBSD_NATIVE
   in_system_header = new_map->sysp != 0;
-#else /* FREEBSD_NATIVE */
-  in_system_header = 0;
+#ifdef FREEBSD_NATIVE
+  if (warn_system_headers)
+    in_system_header = 0;
 #endif /* FREEBSD_NATIVE */
   input_filename = new_map->to_file;
   lineno = to_line;
Index: cppinit.c
===================================================================
RCS file: /home/ncvs/src/contrib/gcc/cppinit.c,v
retrieving revision 1.5
diff -u -r1.5 cppinit.c
--- cppinit.c	11 Jul 2003 04:52:32 -0000	1.5
+++ cppinit.c	15 Jul 2003 14:17:22 -0000
@@ -531,6 +531,7 @@
   CPP_OPTION (pfile, tabstop) = 8;
   CPP_OPTION (pfile, operator_names) = 1;
   CPP_OPTION (pfile, warn_endif_labels) = 1;
+  CPP_OPTION (pfile, warn_system_headers) = 1;
   CPP_OPTION (pfile, warn_long_long) = !CPP_OPTION (pfile, c99);
 
   CPP_OPTION (pfile, pending) =
Index: toplev.c
===================================================================
RCS file: /home/ncvs/src/contrib/gcc/toplev.c,v
retrieving revision 1.20
diff -u -r1.20 toplev.c
--- toplev.c	11 Jul 2003 04:48:05 -0000	1.20
+++ toplev.c	15 Jul 2003 14:18:08 -0000
@@ -1410,7 +1410,7 @@
 
 /* Don't suppress warnings from system headers.  -Wsystem-headers.  */
 
-int warn_system_headers = 0;
+int warn_system_headers = 1;
 
 /* Print various extra warnings.  -W.  */