make missing prototypes warn by default in c99 mode like GCC does,

rdar://7083878

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93073 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Basic/DiagnosticSemaKinds.td b/include/clang/Basic/DiagnosticSemaKinds.td
index ac6d3ec866cedaa9c85335ad80e98b567f7e39e8..7d668a0ffea86eebff8bcdfce2a3064a28d71524 100644 (file)
--- a/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/include/clang/Basic/DiagnosticSemaKinds.td
@@ -89,7 +89,7 @@ def warn_decl_in_param_list : Warning<
 def warn_implicit_function_decl : Warning<
   "implicit declaration of function %0">,
   InGroup<ImplicitFunctionDeclare>, DefaultIgnore;
-def ext_implicit_function_decl : Extension<
+def ext_implicit_function_decl : ExtWarn<
   "implicit declaration of function %0 is invalid in C99">,
   InGroup<ImplicitFunctionDeclare>;