Merge topic 'Win-HOST_SYSTEM_PROCESSOR'

add8d22 properly detect processor architecture on Windows

Modules/CMakeDetermineSystem.cmake

@@ -73,7 +73,11 @@ if(CMAKE_HOST_UNIX)
 else()
   if(CMAKE_HOST_WIN32)
     set (CMAKE_HOST_SYSTEM_NAME "Windows")
-    set (CMAKE_HOST_SYSTEM_PROCESSOR "$ENV{PROCESSOR_ARCHITECTURE}")
+    if (ENV{PROCESSOR_ARCHITEW6432})
+      set (CMAKE_HOST_SYSTEM_PROCESSOR "$ENV{PROCESSOR_ARCHITEW6432}")
+    else()
+      set (CMAKE_HOST_SYSTEM_PROCESSOR "$ENV{PROCESSOR_ARCHITECTURE}")
+    endif()
   endif()
 endif()