[Preprocessor] Pass TranslationUnitKind to the preprocessor and if it is TU_Prefix

avoid warning for unused macros.

rdar://15034698

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@203213 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/Frontend/ChainedIncludesSource.cpp b/lib/Frontend/ChainedIncludesSource.cpp
index ab5c81fb58..1bdd48e168 100644
--- a/lib/Frontend/ChainedIncludesSource.cpp
+++ b/lib/Frontend/ChainedIncludesSource.cpp
@@ -104,7 +104,7 @@ ChainedIncludesSource::create(CompilerInstance &CI) {
                                                   &Clang->getTargetOpts()));
     Clang->createFileManager();
     Clang->createSourceManager(Clang->getFileManager());
-    Clang->createPreprocessor();
+    Clang->createPreprocessor(TU_Prefix);
     Clang->getDiagnosticClient().BeginSourceFile(Clang->getLangOpts(),
                                                  &Clang->getPreprocessor());
     Clang->createASTContext();