Preprocessor: Ignore unknown pragmas in -E -dM and -Eonly modes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@105830 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/Frontend/FrontendActions.cpp b/lib/Frontend/FrontendActions.cpp
index 6cd960be20..421d69d243 100644
--- a/lib/Frontend/FrontendActions.cpp
+++ b/lib/Frontend/FrontendActions.cpp
@@ -9,6 +9,7 @@
 
 #include "clang/Frontend/FrontendActions.h"
 #include "clang/AST/ASTConsumer.h"
+#include "clang/Lex/Pragma.h"
 #include "clang/Lex/Preprocessor.h"
 #include "clang/Parse/Parser.h"
 #include "clang/Basic/FileManager.h"
@@ -223,6 +224,9 @@ void ParseOnlyAction::ExecuteAction() {
 void PreprocessOnlyAction::ExecuteAction() {
   Preprocessor &PP = getCompilerInstance().getPreprocessor();
 
+  // Ignore unknown pragmas.
+  PP.AddPragmaHandler(0, new EmptyPragmaHandler());
+
   Token Tok;
   // Start parsing the specified input file.
   PP.EnterMainSourceFile();