Major refactoring:  Remove Platform concept.  In its place there are 
now Reader and Writer subclasses for each file format.  Each Reader and
Writer subclass defines an "options" class which controls how that Reader
or Writer operates.

llvm-svn: 157774
diff --git a/lld/lib/ReaderWriter/PECOFF/WriterPECOFF.cpp b/lld/lib/ReaderWriter/PECOFF/WriterPECOFF.cpp
new file mode 100644
index 0000000..8fec44e
--- /dev/null
+++ b/lld/lib/ReaderWriter/PECOFF/WriterPECOFF.cpp
@@ -0,0 +1,35 @@
+//===- lib/ReaderWriter/PECOFF/WriterPECOFF.cpp ---------------------------===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lld/ReaderWriter/WriterPECOFF.h"
+
+#include "llvm/Support/Debug.h"
+
+
+namespace lld {
+namespace pe_coff {
+
+// define PE/COFF writer class here
+
+
+} // namespace pe_coff
+
+Writer* createWriterPECOFF(const WriterOptionsPECOFF &options) {
+  assert(0 && "PE/COFF support not implemented yet");
+  return nullptr;
+}
+
+WriterOptionsPECOFF::WriterOptionsPECOFF() {
+}
+
+WriterOptionsPECOFF::~WriterOptionsPECOFF() {
+}
+
+} // namespace lld
+