Fix building with gcc.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@128863 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Frontend/Utils.h b/include/clang/Frontend/Utils.h
index 8ffa2902e86cc5031daf59f94ba966b79fc04c23..e4997165cd11832be05dba11259bb4ba37b38165 100644 (file)
--- a/include/clang/Frontend/Utils.h
+++ b/include/clang/Frontend/Utils.h
@@ -14,6 +14,7 @@
 #ifndef LLVM_CLANG_FRONTEND_UTILS_H
 #define LLVM_CLANG_FRONTEND_UTILS_H
 
+#include "clang/Basic/Diagnostic.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"