Index: lib/Frontend/InitPreprocessor.cpp
===================================================================
--- lib/Frontend/InitPreprocessor.cpp
+++ lib/Frontend/InitPreprocessor.cpp
@@ -1112,8 +1112,12 @@
     Builder.defineMacro("__x86_64__");
     break;
   case llvm::Triple::ppc64:
+    Builder.defineMacro("__powerpc64__");
+    Builder.defineMacro("_CALL_ELF", "1");
+    break;
   case llvm::Triple::ppc64le:
     Builder.defineMacro("__powerpc64__");
+    Builder.defineMacro("_CALL_ELF", "2");
     break;
   default:
     break;