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diff --git a/lld/include/lld/ReaderWriter/ReaderMachO.h b/lld/include/lld/ReaderWriter/ReaderMachO.h
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+//===- ReaderWriter/ReaderMachO.h - MachO File Format Reading Interface ---===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLD_READER_WRITER_READER_MACHO_H_
+#define LLD_READER_WRITER_READER_MACHO_H_
+
+#include "lld/ReaderWriter/Reader.h"
+#include "lld/Core/LLVM.h"
+#include "llvm/ADT/StringRef.h"
+
+
+namespace lld {
+
+/// 
+/// The ReaderOptionsMachO class encapsulates options needed 
+/// to process mach-o files.  You can create an ReaderOptionsMachO 
+/// instance from command line arguments or by subclassing and setting the 
+/// instance variables in the subclass's constructor.
+///
+class ReaderOptionsMachO : public ReaderOptions {
+public:
+  virtual ~ReaderOptionsMachO()  { }
+
+  ///
+  /// Creates a Options object from darwin linker command line arguments.
+  /// FIXME: to be replaced with new option processing mechanism.
+  ///
+  ReaderOptionsMachO(int argc, const char* argv[]);
+  
+  ///
+  /// Creates a Options object with default settings. For use when 
+  /// programmatically constructing options.
+  ///
+  ReaderOptionsMachO();
+
+
+  StringRef archName() const    { return _archName; }
+  
+protected:
+  StringRef       _archName;
+};
+ 
+
+
+
+///
+/// The only way to instantiate a ReaderMachO object  
+/// is via this createReaderMachO function.  The is no public 
+/// ReaderMachO class that you might be tempted to subclass.
+/// Support for all variants must be represented in the ReaderOptionsMachO
+/// object.
+/// The Reader object created retains a reference to the 
+/// ReaderOptionsMachO object supplied, so the objects object must not be  
+/// destroyed before the Reader object. 
+///
+Reader* createReaderMachO(const ReaderOptionsMachO &options);
+
+
+
+} // namespace lld
+
+#endif // LLD_READER_WRITER_READER_MACHO_H_