build: set the 32 bit platform for Windows

Author: aminya

CMakeLists.txt

@@ -6,10 +6,12 @@ if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.24.0")
 endif()
 
 if(WIN32)
-  if(DEFINED ENV{PROCESSOR_ARCHITEW6432})
-    set(CMAKE_HOST_SYSTEM_PROCESSOR "$ENV{PROCESSOR_ARCHITEW6432}")
+  if("${PLATFORM}" STREQUAL "x86")
+    set(CMAKE_SYSTEM_PROCESSOR "x86")
+  elseif(NOT "$ENV{PROCESSOR_ARCHITEW6432}" STREQUAL "")
+    set(CMAKE_SYSTEM_PROCESSOR "$ENV{PROCESSOR_ARCHITEW6432}")
   else()
-    set(CMAKE_HOST_SYSTEM_PROCESSOR "$ENV{PROCESSOR_ARCHITECTURE}")
+    set(CMAKE_SYSTEM_PROCESSOR "$ENV{PROCESSOR_ARCHITECTURE}")
   endif()
 endif()