[libcpp] Use CPP() for Wendif-labels and other flags

diff -u gcc/c-family/c.opt gcc/c-family/c.opt
--- gcc/c-family/c.opt	(working copy)
+++ gcc/c-family/c.opt	(working copy)
@@ -292,7 +292,7 @@ 
 Warn about boolean expression compared with an integer value different from true/false
 
 Wbuiltin-macro-redefined
-C ObjC C++ ObjC++ CPP(warn_builtin_macro_redefined) Var(cpp_warn_builtin_macro_redefined) Warning
+C ObjC C++ ObjC++ CPP(warn_builtin_macro_redefined) Var(cpp_warn_builtin_macro_redefined) Init(1) Warning
 Warn when a built-in preprocessor macro is undefined or redefined
 
 Wc90-c99-compat
@@ -368,7 +368,7 @@ 
 ;
 
 Wdeprecated
-C C++ ObjC ObjC++ Var(warn_deprecated) Init(1) Warning
+C C++ ObjC ObjC++ CPP(cpp_warn_deprecated) Var(warn_deprecated) Init(1) Warning
 Warn if a deprecated compiler feature, class, method, or field is used
 
 Wdesignated-init
@@ -392,7 +392,7 @@ 
 Warn about an empty body in an if or else statement
 
 Wendif-labels
-C ObjC C++ ObjC++ Warning
+C ObjC C++ ObjC++ CPP(warn_endif_labels) Var(cpp_warn_endif_labels) Init(1) Warning
 Warn about stray tokens after #elif and #endif
 
 Wenum-compare
@@ -503,7 +503,7 @@ 
 Warn about invalid uses of the \"offsetof\" macro
 
 Winvalid-pch
-C ObjC C++ ObjC++ Warning
+C ObjC C++ ObjC++ CPP(warn_invalid_pch) Var(cpp_warn_invalid_pch) Warning
 Warn about PCH files that are found but not used
 
 Wjump-misses-init
@@ -511,7 +511,7 @@ 
 Warn when a jump misses a variable initialization
 
 Wliteral-suffix
-C++ ObjC++ Warning
+C++ ObjC++ CPP(warn_literal_suffix) Var(cpp_warn_literal_suffix) Init(1) Warning
 Warn when a string or character literal is followed by a ud-suffix which does not begin with an underscore.
 
 Wlogical-op
@@ -583,7 +583,7 @@ 
 ;
 
 Wmissing-include-dirs
-C ObjC C++ ObjC++ Warning
+C ObjC C++ ObjC++ CPP(warn_missing_include_dirs) Var(cpp_warn_missing_include_dirs) Warning
 Warn about user-specified include directories that do not exist
 
 Wmissing-parameter-type
@@ -794,7 +794,7 @@ 
 Warn of prototypes causing type conversions different from what would happen in the absence of prototype
 
 Wtrigraphs
-C ObjC C++ ObjC++ Warning
+C ObjC C++ ObjC++ CPP(warn_trigraphs) Var(cpp_warn_trigraphs) Init(2) Warning
 Warn if trigraphs are encountered that might affect the meaning of the program
 
 Wundeclared-selector
@@ -802,7 +802,7 @@ 
 Warn about @selector()s without previously declared methods
 
 Wundef
-C ObjC C++ ObjC++ Warning
+C ObjC C++ ObjC++ CPP(warn_undef) Var(cpp_warn_undef) Warning
 Warn if an undefined macro is used in an #if directive
 
 Wuninitialized
diff -u gcc/c-family/c-opts.c gcc/c-family/c-opts.c
--- gcc/c-family/c-opts.c	(working copy)
+++ gcc/c-family/c-opts.c	(working copy)
@@ -389,29 +389,10 @@ 
       cpp_opts->warn_cxx_operator_names = value;
       break;
 
-    case OPT_Wdeprecated:
-      cpp_opts->cpp_warn_deprecated = value;
-      break;
-
-    case OPT_Wendif_labels:
-      cpp_opts->warn_endif_labels = value;
-      break;
-
-    case OPT_Winvalid_pch:
-      cpp_opts->warn_invalid_pch = value;
-      break;
-
-    case OPT_Wliteral_suffix:
-      cpp_opts->warn_literal_suffix = value;
-      break;
-
     case OPT_Wlong_long:
       cpp_opts->cpp_warn_long_long = value;
       break;
 
-    case OPT_Wmissing_include_dirs:
-      cpp_opts->warn_missing_include_dirs = value;
-      break;
     case OPT_Wnormalized_:
       /* FIXME: Move all this to c.opt.  */
       if (kind == DK_ERROR)
@@ -439,14 +420,6 @@ 
       cpp_opts->cpp_warn_traditional = value;
       break;
 
-    case OPT_Wtrigraphs:
-      cpp_opts->warn_trigraphs = value;
-      break;
-
-    case OPT_Wundef:
-      cpp_opts->warn_undef = value;
-      break;
-
     case OPT_Wunknown_pragmas:
       /* Set to greater than 1, so that even unknown pragmas in
 	 system headers will be warned about.  */
diff -u libcpp/directives.c libcpp/directives.c
--- libcpp/directives.c	(working copy)
+++ libcpp/directives.c	(working copy)
@@ -213,16 +213,33 @@ 
       ;
 }
 
-/* Ensure there are no stray tokens at the end of a directive.  If
-   EXPAND is true, tokens macro-expanding to nothing are allowed.  */
+/* Helper function for check_oel.  */
+
 static void
-check_eol (cpp_reader *pfile, bool expand)
+check_eol_1 (cpp_reader *pfile, bool expand, int reason)
 {
   if (! SEEN_EOL () && (expand
 			? cpp_get_token (pfile)
 			: _cpp_lex_token (pfile))->type != CPP_EOF)
-    cpp_error (pfile, CPP_DL_PEDWARN, "extra tokens at end of #%s directive",
-	       pfile->directive->name);
+    cpp_pedwarning (pfile, reason, "extra tokens at end of #%s directive",
+		    pfile->directive->name);
+}
+
+/* Variant of check_eol used for Wendif-labels warnings.  */
+
+static void
+check_eol_endif_labels (cpp_reader *pfile)
+{
+  check_eol_1 (pfile, false, CPP_W_ENDIF_LABELS);
+}
+
+/* Ensure there are no stray tokens at the end of a directive.  If
+   EXPAND is true, tokens macro-expanding to nothing are allowed.  */
+
+static void
+check_eol (cpp_reader *pfile, bool expand)
+{
+  check_eol_1 (pfile, expand, CPP_W_NONE);
 }
 
 /* Ensure there are no stray tokens other than comments at the end of
@@ -1990,7 +2007,7 @@ 
 
       /* Only check EOL if was not originally skipping.  */
       if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels))
-	check_eol (pfile, false);
+	check_eol_endif_labels (pfile);
     }
 }
 
@@ -2051,7 +2068,7 @@ 
     {
       /* Only check EOL if was not originally skipping.  */
       if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels))
-	check_eol (pfile, false);
+	check_eol_endif_labels (pfile);
 
       /* If potential control macro, we go back outside again.  */
       if (ifs->next == 0 && ifs->mi_cmacro)