We have disabled the -fstrict-overflow option by default.
Index: gcc-local.1
===================================================================
RCS file: /home/tedu/cvs/src/share/man/man1/gcc-local.1,v
retrieving revision 1.23
diff -u -p -r1.23 gcc-local.1
--- gcc-local.1 2 Jun 2011 21:39:10 -0000 1.23
+++ gcc-local.1 17 Jul 2011 01:22:11 -0000
@@ -80,6 +80,15 @@ as this option causes issues on some leg
is very unsafe with code that plays tricks with casts, bypassing the
already weak type system of C.
.It
+The
+.Fl O2
+option does not include
+.Fl fstrict-overflow ,
+as this option causes issues on some legacy code.
+.Fl fstrict-overflow
+can cause surprising optimizations to occur, possibly deleting security
+critical overflow checks.
+.It
The option
.Fl fno-builtin-<function>
was backported from
