hopefully fix CMake problems

Author: Moxinilian

mlir/cmake/modules/IRDLToCpp.cmake

@@ -2,8 +2,11 @@ function(add_irdl_to_cpp_target target irdl_file)
   add_custom_command(
     OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${irdl_file}.cpp.inc
     COMMAND ${MLIR_IRDL_TO_CPP_EXE} ${CMAKE_CURRENT_SOURCE_DIR}/${irdl_file} -o ${CMAKE_CURRENT_BINARY_DIR}/${irdl_file}.cpp.inc
-    DEPENDS ${MLIR_IRDL_TO_CPP_TARGET} ${irdl_file}
+
+    # The command output depends on the executable to ensure IRDL sources are properly rebuilt
+    # if the tool changes.
+    DEPENDS ${MLIR_IRDL_TO_CPP_EXE} ${CMAKE_CURRENT_SOURCE_DIR}/${irdl_file}
     COMMENT "Building ${irdl_file}..."
   )
-  add_custom_target(${target} ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${irdl_file}.cpp.inc)
+  add_custom_target(${target} DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${irdl_file}.cpp.inc)
 endfunction()