basic support for -Wunknown-pragmas, more coming.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69547 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/Lex/Pragma.cpp b/lib/Lex/Pragma.cpp
index 6bef2c8f77..6cea5fbe73 100644
--- a/lib/Lex/Pragma.cpp
+++ b/lib/Lex/Pragma.cpp
@@ -70,7 +70,10 @@ void PragmaNamespace::HandlePragma(Preprocessor &PP, Token &Tok) {
   
   // Get the handler for this token.  If there is no handler, ignore the pragma.
   PragmaHandler *Handler = FindHandler(Tok.getIdentifierInfo(), false);
-  if (Handler == 0) return;
+  if (Handler == 0) {
+    PP.Diag(Tok, diag::warn_pragma_ignored);
+    return;
+  }
   
   // Otherwise, pass it down.
   Handler->HandlePragma(PP, Tok);