Update AddMLIRPython.cmake

Author: makslevental

mlir/cmake/modules/AddMLIRPython.cmake

@@ -683,15 +683,16 @@ function(add_mlir_python_extension libname extname)
           ${eh_rtti_enable}
       )
     endif()
+    
+    if(APPLE)
+      # NanobindAdaptors.h uses PyClassMethod_New to build `pure_subclass`es but nanobind
+      # doesn't declare this API as undefined in its linker flags. So we need to declare it as such
+      # for downstream users that do not do something like -undefined dynamic_lookup
+      set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,-U -Wl,_PyClassMethod_New")
+    endif()
   endif()
 
   target_compile_options(${libname} PRIVATE ${eh_rtti_enable})
-  if(APPLE)
-    # NanobindAdaptors.h uses PyClassMethod_New to build `pure_subclass`es but nanobind
-    # doesn't declare this API as undefined in its linker flags. So we need to declare it as such
-    # for downstream users that do not do something like -undefined dynamic_lookup
-    set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,-U -Wl,_PyClassMethod_New")
-  endif()
 
   # Configure the output to match python expectations.
   set_target_properties(