https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98667
--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Martin Liška from comment #13)
> @H.J. Can you please document that one needs at least i686 CPU for the
> functionality?
Like this?
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index c66a25fcd69..71992b8c597 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -15542,7 +15542,8 @@ which functions and calls should be skipped from
instrumentation
(@pxref{Function Attributes}).
Currently the x86 GNU/Linux target provides an implementation based
-on Intel Control-flow Enforcement Technology (CET).
+on Intel Control-flow Enforcement Technology (CET) which works for
+i686 processor or newer.
@item -fstack-protector
@opindex fstack-protector
