[PATCH] doc: Add @cindex to symver attribute

[Jakub Jelinek]

Hi!

When looking at the symver attr documentation in html, I found there is no
name to refer to for it.
The following patch fixes that, bootstrapped on x86_64-linux, ok for trunk
and 10.3?

2020-08-04  Jakub Jelinek  <jakub@redhat.com>

	* doc/extend.texi (symver): Add @cindex for symver function attribute.

--- gcc/doc/extend.texi.jj	2020-07-28 15:39:09.849758414 +0200
+++ gcc/doc/extend.texi	2020-08-03 17:02:06.221350978 +0200
@@ -3723,6 +3723,7 @@ Function Attributes}, @ref{PowerPC Funct
 for details.
 
 @item symver ("@var{name2}@@@var{nodename}")
+@cindex @code{symver} function attribute
 On ELF targets this attribute creates a symbol version.  The @var{name2} part
 of the parameter is the actual name of the symbol by which it will be
 externally referenced.  The @code{nodename} portion should be the name of a

	Jakub