Index: include/lld/LinkDriver/LinkDriver.h
===================================================================
--- /dev/null
+++ include/lld/LinkDriver/LinkDriver.h
@@ -0,0 +1,26 @@
+//===- lld/LinkDriver/LinkDriver.h - link.exe-compatible driver -*- C++ -*-===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Defines an interface to a link.exe-compatible driver.
+// Used by lld-link.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLD_LINKDRIVER_LINKDRIVER_H
+#define LLD_LINKDRIVER_LINKDRIVER_H
+
+#include "llvm/ADT/ArrayRef.h"
+
+namespace lld {
+
+int linkDriverMain(llvm::ArrayRef<const char*> ArgsArr);
+
+}
+
+#endif
Index: lib/CMakeLists.txt
===================================================================
--- lib/CMakeLists.txt
+++ lib/CMakeLists.txt
@@ -1,4 +1,5 @@
 add_subdirectory(Config)
 add_subdirectory(Core)
 add_subdirectory(Driver)
+add_subdirectory(LinkDriver)
 add_subdirectory(ReaderWriter)
Index: lib/LinkDriver/CMakeLists.txt
===================================================================
--- /dev/null
+++ lib/LinkDriver/CMakeLists.txt
@@ -0,0 +1,8 @@
+set(LLVM_TARGET_DEFINITIONS Options.td)
+tablegen(LLVM Options.inc -gen-opt-parser-defs)
+add_public_tablegen_target(LinkOptionsTableGen)
+
+add_llvm_library(LLDLinkDriver
+  LinkDriver.cpp
+  )
+add_dependencies(LLDLinkDriver LinkOptionsTableGen)
Index: lib/LinkDriver/LinkDriver.cpp
===================================================================
--- /dev/null
+++ lib/LinkDriver/LinkDriver.cpp
@@ -0,0 +1,85 @@
+//===- LinkDriver.cpp - link.exe-compatible driver ------------------------===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Defines a link.exe-compatible driver
+// Used by lld-link.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lld/LinkDriver/LinkDriver.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Option/Arg.h"
+#include "llvm/Option/ArgList.h"
+#include "llvm/Option/Option.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/StringSaver.h"
+
+using namespace llvm;
+
+namespace {
+
+enum {
+  OPT_INVALID = 0,
+#define OPTION(_1, _2, ID, _4, _5, _6, _7, _8, _9, _10, _11) OPT_##ID,
+#include "Options.inc"
+#undef OPTION
+};
+
+#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
+#include "Options.inc"
+#undef PREFIX
+
+static const llvm::opt::OptTable::Info infoTable[] = {
+#define OPTION(X1, X2, ID, KIND, GROUP, ALIAS, X6, X7, X8, X9, X10)    \
+  {                                                                    \
+    X1, X2, X9, X10, OPT_##ID, llvm::opt::Option::KIND##Class, X8, X7, \
+    OPT_##GROUP, OPT_##ALIAS, X6                                       \
+  },
+#include "Options.inc"
+#undef OPTION
+};
+
+class LinkOptTable : public llvm::opt::OptTable {
+public:
+  LinkOptTable() : OptTable(infoTable, llvm::array_lengthof(infoTable), true) {}
+};
+
+}
+
+int lld::linkDriverMain(llvm::ArrayRef<const char*> ArgsArr) {
+  SmallVector<const char *, 20> NewArgs(ArgsArr.begin(), ArgsArr.end());
+  BumpPtrAllocator Alloc;
+  StringSaver Saver(Alloc);
+  cl::ExpandResponseFiles(Saver, cl::TokenizeWindowsCommandLine, NewArgs);
+  ArgsArr = NewArgs;
+
+  LinkOptTable Table;
+  unsigned MissingIndex;
+  unsigned MissingCount;
+  llvm::opt::InputArgList Args =
+      Table.ParseArgs(ArgsArr.slice(1), MissingIndex, MissingCount);
+  if (MissingCount) {
+    llvm::errs() << "missing arg value for \""
+                 << Args.getArgString(MissingIndex)
+                 << "\", expected " << MissingCount
+                 << (MissingCount == 1 ? " argument.\n" : " arguments.\n");
+    return 1;
+  }
+  for (auto *Arg : Args.filtered(OPT_UNKNOWN))
+    llvm::errs() << "ignoring unknown argument: " << Arg->getSpelling() << "\n";
+
+  if (Args.filtered_begin(OPT_INPUT) == Args.filtered_end()) {
+    llvm::errs() << "no input files.\n";
+    return 1;
+  }
+
+  return 0;
+}
Index: lib/LinkDriver/Options.td
===================================================================
--- /dev/null
+++ lib/LinkDriver/Options.td
@@ -0,0 +1,12 @@
+include "llvm/Option/OptParser.td"
+
+// link.exe accepts options starting with either a dash or a slash.
+
+// Flag that takes no arguments.
+class F<string name> : Flag<["/", "-", "-?"], name>;
+
+// Flag that takes one argument after ":".
+class P<string name, string help> :
+      Joined<["/", "-", "-?"], name#":">, HelpText<help>;
+
+def out    : P<"out", "Path to file to write output">;
Index: tools/lld/CMakeLists.txt
===================================================================
--- tools/lld/CMakeLists.txt
+++ tools/lld/CMakeLists.txt
@@ -11,16 +11,18 @@
 install(TARGETS lld
   RUNTIME DESTINATION bin)
 
-# Create the lld-link[.exe] symlink in the build directory. If symlink is not
-# supported by the operating system, create a copy instead.
 if(UNIX)
-  set(command create_symlink)
-  # Make relative symlink
-  set(src "lld${CMAKE_EXECUTABLE_SUFFIX}")
+  set(LLD_LINK_OR_COPY create_symlink)
+  set(lld_binary "lld${CMAKE_EXECUTABLE_SUFFIX}")
 else()
-  set(command copy)
-  set(src "${LLVM_RUNTIME_OUTPUT_INTDIR}/lld${CMAKE_EXECUTABLE_SUFFIX}")
+  set(LLD_LINK_OR_COPY copy)
+  set(lld_binary "${LLVM_RUNTIME_OUTPUT_INTDIR}/lld${CMAKE_EXECUTABLE_SUFFIX}")
 endif()
-set(dst "${LLVM_RUNTIME_OUTPUT_INTDIR}/lld-link${CMAKE_EXECUTABLE_SUFFIX}")
-add_custom_command(TARGET lld POST_BUILD
-  COMMAND ${CMAKE_COMMAND} -E ${command} ${src} ${dst})
+
+set(lld_link "${LLVM_RUNTIME_OUTPUT_INTDIR}/lld-link${CMAKE_EXECUTABLE_SUFFIX}")
+
+add_custom_command(OUTPUT ${lld_link}
+                   COMMAND ${CMAKE_COMMAND} -E ${LLD_LINK_OR_COPY} "${lld_binary}" "${lld_link}"
+                   DEPENDS lld)
+
+install(SCRIPT install_symlink.cmake -DCMAKE_INSTALL_PREFIX=\"${CMAKE_INSTALL_PREFIX}\")
Index: tools/lld/install_symlink.cmake
===================================================================
--- /dev/null
+++ tools/lld/install_symlink.cmake
@@ -0,0 +1,25 @@
+# We need to execute this script at installation time because the
+# DESTDIR environment variable may be unset at configuration time.
+# See PR8397.
+
+if(UNIX)
+  set(LINK_OR_COPY create_symlink)
+  set(DESTDIR $ENV{DESTDIR})
+else()
+  set(LINK_OR_COPY copy)
+endif()
+
+# CMAKE_EXECUTABLE_SUFFIX is undefined on cmake scripts. See PR9286.
+if( WIN32 )
+  set(EXECUTABLE_SUFFIX ".exe")
+else()
+  set(EXECUTABLE_SUFFIX "")
+endif()
+
+set(bindir "${DESTDIR}${CMAKE_INSTALL_PREFIX}/bin/")
+
+message("Creating lld-link")
+
+execute_process(
+  COMMAND "${CMAKE_COMMAND}" -E ${LINK_OR_COPY} "lld${EXECUTABLE_SUFFIX}" "lld-link${EXECUTABLE_SUFFIX}"
+  WORKING_DIRECTORY "${bindir}")