re PR c++/16190 (-Wnon-virtual-dtor, in -Wall, silenced only by pessimizing code)

        PR c++/16190
        * c-opts.c (c_common_handle_option): Don't include
        -Wnon-virtual-dtor in -Wall; enable if -Weffc++.
        * doc/invoke.texi (C++ Dialect Options): Document that
        -Wnon-virtual-dtor is no longer included in -Wall.

From-SVN: r110085

gcc/ChangeLog

+2006-01-21  Gabriel Dos Reis  <gdr@integrable-solutions.net>
+
+	PR c++/16190
+	* c-opts.c (c_common_handle_option): Don't include
+	-Wnon-virtual-dtor in -Wall; enable if -Weffc++.
+	* doc/invoke.texi (C++ Dialect Options): Document that
+	-Wnon-virtual-dtor is no longer included in -Wall.
+
 2006-01-21  Joseph S. Myers  <joseph@codesourcery.com>
 
 	* gcov.c (print_version), gcov-dump.c (print_version),

gcc/c-opts.c

@@ -409,7 +409,6 @@ c_common_handle_option (size_t scode, const char *arg, int value)
       else
 	{
 	  /* C++-specific warnings.  */
-	  warn_nonvdtor = value;
 	  warn_reorder = value;
 	  warn_nontemplate_friend = value;
 	}
@@ -539,6 +538,12 @@ c_common_handle_option (size_t scode, const char *arg, int value)
 	warn_write_strings = value;
       break;
 
+    case OPT_Weffc__:
+      warn_ecpp = value;
+      if (value)
+        warn_nonvdtor = true;
+      break;
+
     case OPT_ansi:
       if (!c_dialect_cxx ())
 	set_std_c89 (false, true);

gcc/doc/invoke.texi

@@ -1736,8 +1736,8 @@ public static member functions.
 @item -Wnon-virtual-dtor @r{(C++ only)}
 @opindex Wnon-virtual-dtor
 Warn when a class appears to be polymorphic, thereby requiring a virtual
-destructor, yet it declares a non-virtual one.
-This warning is enabled by @option{-Wall}.
+destructor, yet it declares a non-virtual one.  This warning is also
+enabled if -Weffc++ is specified.
 
 @item -Wreorder @r{(C++ only)}
 @opindex Wreorder