invoke.texi: Document that -Wlogical-not-parentheses is enabled by -Wall.

	* doc/invoke.texi: Document that -Wlogical-not-parentheses is enabled
	by -Wall.
c-family/
	* c.opt (Wlogical-not-parentheses): Enable by -Wall.

From-SVN: r214893

gcc/ChangeLog

+2014-09-03  Marek Polacek  <polacek@redhat.com>
+
+	* doc/invoke.texi: Document that -Wlogical-not-parentheses is enabled
+	by -Wall.
+
 2014-09-03  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	* doc/rtl.texi (RTX_AUTOINC): Document that the first operand is

gcc/c-family/ChangeLog

+2014-09-03  Marek Polacek  <polacek@redhat.com>
+
+	* c.opt (Wlogical-not-parentheses): Enable by -Wall.
+
 2014-09-02  Jakub Jelinek  <jakub@redhat.com>
 	    Balaji V. Iyer  <balaji.v.iyer@intel.com>
 	    Igor Zamyatin  <igor.zamyatin@intel.com>

gcc/c-family/c.opt

@@ -519,7 +519,7 @@ C ObjC C++ ObjC++ Var(warn_logical_op) Init(0) Warning
 Warn when a logical operator is suspiciously always evaluating to true or false
 
 Wlogical-not-parentheses
-C ObjC C++ ObjC++ Var(warn_logical_not_paren) Warning
+C ObjC C++ ObjC++ Var(warn_logical_not_paren) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 Warn when logical not is used on the left hand side operand of a comparison
 
 Wlong-long

gcc/doc/invoke.texi

@@ -4800,6 +4800,8 @@ parentheses:
 if ((!a) > 1) @{ @dots{} @}
 @end smallexample
 
+This warning is enabled by @option{-Wall}.
+
 @item -Waggregate-return
 @opindex Waggregate-return
 @opindex Wno-aggregate-return