diff --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -2081,6 +2081,11 @@
   endif()
 endfunction()
 
+# By default we use symlinks on Unix platforms and copy binaries on Windows
+# If you have the correct setup on Windows you can use this option to enable
+# symlinks and save a lot of diskspace.
+option(LLVM_USE_SYMLINKS ${CMAKE_HOST_UNIX} "Use symlinks instead of copying binaries")
+
 function(llvm_add_tool_symlink project link_name target)
   cmake_parse_arguments(ARG "ALWAYS_GENERATE" "OUTPUT_DIR" "" ${ARGN})
 
@@ -2101,7 +2106,7 @@
   if(NOT ARG_OUTPUT_DIR)
     # If you're not overriding the OUTPUT_DIR, we can make the link relative in
     # the same directory.
-    if(CMAKE_HOST_UNIX)
+    if(LLVM_USE_SYMLINKS)
       set(dest_binary "$<TARGET_FILE_NAME:${target}>")
     endif()
     if(CMAKE_CONFIGURATION_TYPES)
@@ -2127,7 +2132,7 @@
     endif()
   endif()
 
-  if(CMAKE_HOST_UNIX)
+  if(LLVM_USE_SYMLINKS)
     set(LLVM_LINK_OR_COPY create_symlink)
   else()
     set(LLVM_LINK_OR_COPY copy)