(main): When -W sets warn_uninitialized, avoid later warning

if warn_uninitialized is not supported.

From-SVN: r4993

diff --git a/gcc/toplev.c b/gcc/toplev.c
index 9967369bba7ce5a4979759d2c08824d218608d4c..339f0edb84506599739e5279a6acbc37a3706fb8 100644 (file)
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -3107,7 +3107,11 @@ main (argc, argv, envp)
          else if (!strcmp (str, "W"))
            {
              extra_warnings = 1;
-             warn_uninitialized = 1;
+             /* We save the value of warn_uninitialized, since if they put
+                -Wuninitialized on the command line, we need to generate a
+                warning about not using it without also specifying -O.  */
+             if (warn_uninitialized != 1)
+               warn_uninitialized = 2;
            }
          else if (str[0] == 'W')
            {