[Code scan] Raise or gate the CMake minimum for CUDA and dynamic cudart features

[njzjz]

This issue was found by a Codex global scan of the repository at commit 19f9265.

The project declares CMake 3.15 as sufficient:

deepmd-gnn/CMakeLists.txt

Lines 1 to 2 in 19f9265

	cmake_minimum_required(VERSION 3.15)
	project(deepmd-gnn CXX)

The CUDA build path uses newer CMake features, including FindCUDAToolkit, CUDA language/runtime properties, and COMMAND_ERROR_IS_FATAL in the dynamic cudart stub generation path:

deepmd-gnn/CMakeLists.txt

Lines 38 to 41 in 19f9265

	if(DEEPMD_GNN_WITH_CUDA STREQUAL "ON")
	find_package(CUDAToolkit REQUIRED)
	elseif(DEEPMD_GNN_WITH_CUDA STREQUAL "AUTO")
	find_package(CUDAToolkit QUIET)

deepmd-gnn/CMakeLists.txt

Lines 73 to 79 in 19f9265

	if(NOT DEFINED CMAKE_CUDA_COMPILER)
	set(CMAKE_CUDA_COMPILER ${DEEPMD_GNN_NVCC_EXECUTABLE})
	endif()
	if(NOT DEFINED CMAKE_CUDA_HOST_COMPILER)
	set(CMAKE_CUDA_HOST_COMPILER ${CMAKE_CXX_COMPILER})
	endif()
	enable_language(CUDA)

deepmd-gnn/op/CMakeLists.txt

Lines 24 to 30 in 19f9265

	if(DEEPMD_GNN_ENABLE_CUDA)
	target_compile_definitions(deepmd_gnn PRIVATE DEEPMD_GNN_WITH_CUDA)
	set_target_properties(deepmd_gnn PROPERTIES CUDA_STANDARD 17)
	if(TARGET deepmd_gnn_cudart)
	set_target_properties(deepmd_gnn PROPERTIES CUDA_RUNTIME_LIBRARY None)
	target_link_libraries(deepmd_gnn PRIVATE deepmd_gnn_cudart ${CMAKE_DL_LIBS})
	endif()

deepmd-gnn/op/cudart/CMakeLists.txt

Lines 12 to 18 in 19f9265

	execute_process(
	COMMAND
	${Python3_EXECUTABLE} ${PROJECT_SOURCE_DIR}/third_party/implib/implib-gen.py
	${CUDART_LOCATION} --target ${CMAKE_SYSTEM_PROCESSOR} --dlopen-callback
	DPGNN_cudart_dlopen --dlsym-callback DPGNN_cudart_dlsym
	COMMAND_ERROR_IS_FATAL ANY
	WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})

Users with an accepted-but-too-old CMake can hit confusing configure failures, especially when DEEPMD_GNN_WITH_CUDA=ON or dynamic cudart is enabled.

Suggested fix: raise cmake_minimum_required() to the real minimum needed by the CUDA/dynamic-cudart path, or gate/replace the newer commands for older CMake versions. At minimum, fail early with a clear diagnostic when those paths are requested.