re PR other/58467 (Documentation of the "used" variable attribute needs additional information)

2013-09-20  Marek Polacek  <polacek@redhat.com>

	PR other/58467
	* doc/extend.texi: Document that attribute used is meant to be used
	on variables with static storage duration.

From-SVN: r202764

gcc/ChangeLog

+2013-09-20  Marek Polacek  <polacek@redhat.com>
+
+	PR other/58467
+	* doc/extend.texi: Document that attribute used is meant to be used
+	on variables with static storage duration.
+
 2013-09-19  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/58472

gcc/doc/extend.texi

@@ -4891,8 +4891,9 @@ to be possibly unused.  GCC does not produce a warning for this
 variable.
 
 @item used
-This attribute, attached to a variable, means that the variable must be
-emitted even if it appears that the variable is not referenced.
+This attribute, attached to a variable with the static storage, means that
+the variable must be emitted even if it appears that the variable is not
+referenced.
 
 When applied to a static data member of a C++ class template, the
 attribute also means that the member is instantiated if the