From: liuhongt <hongtao.liu@intel.com>
Date: Mon, 8 Jan 2024 06:04:38 +0000 (+0800)
Subject: Update documents for fcf-protection=
X-Git-Tag: basepoints/gcc-15~2975
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=75ed46558a2e085ba12641a47112e37f114faee0;p=thirdparty%2Fgcc.git

Update documents for fcf-protection=

After r14-2692-g1c6231c05bdcca, the option is defined as EnumSet and
-fcf-protection=branch won't unset any others bits since they're in
different groups. So to override -fcf-protection, an explicit
-fcf-protection=none needs to be added and then with
-fcf-protection=XXX

gcc/ChangeLog:

	PR target/113039
	* doc/invoke.texi (fcf-protection=): Update documents.
---

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index c1bb54b4109a..b7a201317cea 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -17734,6 +17734,9 @@ function.  The value @code{full} is an alias for specifying both
 @code{branch} and @code{return}. The value @code{none} turns off
 instrumentation.
 
+To override @option{-fcf-protection}, @option{-fcf-protection=none}
+needs to be added and then with @option{-fcf-protection=xxx}.
+
 The value @code{check} is used for the final link with link-time
 optimization (LTO).  An error is issued if LTO object files are
 compiled with different @option{-fcf-protection} values.  The