LGTM with a nit. Thank you for doing this. ================ Comment at: unittests/MachOTests/MachONormalizedFileBinaryWriterTests.cpp:24 @@ -23,3 +23,3 @@ using llvm::MemoryBuffer; -using llvm::OwningPtr; +using std::unique_ptr; using llvm::SmallString; ---------------- Remove this line. http://llvm-reviews.chandlerc.com/D3055