back out r149504
Too many weird build failures.
llvm-svn: 149571
diff --git a/clang/lib/Frontend/InitHeaderSearch.cpp b/clang/lib/Frontend/InitHeaderSearch.cpp
index 2736fd8..ee75e69 100644
--- a/clang/lib/Frontend/InitHeaderSearch.cpp
+++ b/clang/lib/Frontend/InitHeaderSearch.cpp
@@ -26,8 +26,11 @@
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Path.h"
-#include "clang/Config/config.h"
+#ifdef HAVE_CLANG_CONFIG_H
+# include "clang/Config/config.h"
+#endif
+#include "llvm/Config/config.h"
using namespace clang;
using namespace clang::frontend;