Index: llvm/trunk/cmake/modules/AddLLVM.cmake
===================================================================
--- llvm/trunk/cmake/modules/AddLLVM.cmake
+++ llvm/trunk/cmake/modules/AddLLVM.cmake
@@ -1473,7 +1473,7 @@
   if(NOT ARG_OUTPUT_DIR)
     # If you're not overriding the OUTPUT_DIR, we can make the link relative in
     # the same directory.
-    if(UNIX)
+    if(CMAKE_HOST_UNIX)
       set(dest_binary "$<TARGET_FILE_NAME:${target}>")
     endif()
     if(CMAKE_CONFIGURATION_TYPES)
@@ -1499,7 +1499,7 @@
     endif()
   endif()
 
-  if(UNIX)
+  if(CMAKE_HOST_UNIX)
     set(LLVM_LINK_OR_COPY create_symlink)
   else()
     set(LLVM_LINK_OR_COPY copy)
Index: llvm/trunk/cmake/modules/LLVMInstallSymlink.cmake
===================================================================
--- llvm/trunk/cmake/modules/LLVMInstallSymlink.cmake
+++ llvm/trunk/cmake/modules/LLVMInstallSymlink.cmake
@@ -3,7 +3,7 @@
 # See PR8397.
 
 function(install_symlink name target outdir)
-  if(UNIX)
+  if(CMAKE_HOST_UNIX)
     set(LINK_OR_COPY create_symlink)
     set(DESTDIR $ENV{DESTDIR})
   else()