Switch to using the global MLIR_BINDINGS_PYTHON_NB_DOMAIN

Author: erwei-xilinx

mlir/CMakeLists.txt

@@ -174,6 +174,8 @@ configure_file(
 # disable all package setup and control it themselves.
 #-------------------------------------------------------------------------------
 
+set(MLIR_BINDINGS_PYTHON_NB_DOMAIN "mlir"
+  CACHE STRING "nanobind domain for MLIR python bindings.")
 set(MLIR_ENABLE_BINDINGS_PYTHON 0 CACHE BOOL
        "Enables building of Python bindings.")
 set(MLIR_DETECT_PYTHON_ENV_PRIME_SEARCH 1 CACHE BOOL

mlir/cmake/modules/AddMLIRPython.cmake

@@ -659,11 +659,11 @@ function(add_mlir_python_extension libname extname)
   endif ()
 
   # Avoids domain conflict with nanobind by specifying NB_DOMAIN.
-  if(NB_DOMAIN)
-    set(_nb_domain ${NB_DOMAIN})
+  if(MLIR_BINDINGS_PYTHON_NB_DOMAIN)
+    set(_nb_domain ${MLIR_BINDINGS_PYTHON_NB_DOMAIN})
   else()
     set(_nb_domain "mlir")
-  endif ()
+  endif()
 
   # The actual extension library produces a shared-object or DLL and has
   # sources that must be compiled in accordance with pybind11 needs (RTTI and