Add -Wlanguage-extension-token option for ext_token_used warning.

llvm-svn: 141268

clang/include/clang/Basic/DiagnosticLexKinds.td

@@ -43,7 +43,8 @@ def ext_no_newline_eof : Extension<"no newline at end of file">,
 def ext_dollar_in_identifier : Extension<"'$' in identifier">;
 def charize_microsoft_ext : Extension<"@# is a microsoft extension">;
 
-def ext_token_used : Extension<"extension used">;
+def ext_token_used : Extension<"extension used">,
+  InGroup<DiagGroup<"language-extension-token">>;
 
 def warn_unterminated_string : ExtWarn<"missing terminating '\"' character">;
 def warn_unterminated_char : ExtWarn<"missing terminating ' character">;

clang/lib/Driver/Tools.cpp

@@ -2637,6 +2637,7 @@ void darwin::CC1::RemoveCC1UnsupportedArgs(ArgStringList &CmdArgs) const {
         .Case("initializer-overrides", true)
         .Case("invalid-noreturn", true)
         .Case("invalid-token-paste", true)
+        .Case("language-extension-token", true)
         .Case("literal-conversion", true)
         .Case("literal-range", true)
         .Case("local-type-template-args", true)

clang/test/Misc/warning-flags.c

@@ -17,7 +17,7 @@ This test serves two purposes:
 
 The list of warnings below should NEVER grow.  It should gradually shrink to 0.
 
-CHECK: Warnings without flags (301):
+CHECK: Warnings without flags (300):
 CHECK-NEXT:   backslash_newline_space
 CHECK-NEXT:   charize_microsoft_ext
 CHECK-NEXT:   ext_anon_param_requires_type_specifier
@@ -85,7 +85,6 @@ CHECK-NEXT:   ext_return_has_void_expr
 CHECK-NEXT:   ext_subscript_non_lvalue
 CHECK-NEXT:   ext_template_arg_extra_parens
 CHECK-NEXT:   ext_thread_before
-CHECK-NEXT:   ext_token_used
 CHECK-NEXT:   ext_top_level_semi
 CHECK-NEXT:   ext_typecheck_addrof_void
 CHECK-NEXT:   ext_typecheck_cast_nonscalar