opts.c (common_handle_option): Treat -Wstrict-overflow (with no argument) like -Wstrict-overflow=2.

	* opts.c (common_handle_option): Treat -Wstrict-overflow (with no
	argument) like -Wstrict-overflow=2.
	* doc/invoke.texi (Warning Options): Update documentation.

From-SVN: r122753

1 files changed, 5 insertions, 0 deletions

diff --git a/gcc/opts.c b/gcc/opts.c
index d3aea98..ecbc9a3 100644
--- a/gcc/opts.c
+++ b/gcc/opts.c
@@ -1094,6 +1094,11 @@ common_handle_option (size_t scode, const char *arg, int value,
       break;
 
     case OPT_Wstrict_overflow:
+      warn_strict_overflow = (value
+			      ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
+			      : 0);
+      break;
+
     case OPT_Wstrict_overflow_:
       warn_strict_overflow = value;
       break;