feat: bump CMake minimum version to 3.25

Update CMake minimum required version from 3.16 to 3.25 to support
RUN_OUTPUT_STDOUT_VARIABLE used in Findtensorflow.cmake.

Changes:
- Updated source/CMakeLists.txt main requirement
- Updated backend/read_env.py for all variants (cpu, cuda, rocm)
- Updated documentation in doc/install/install-from-source.md
- Updated GPU-specific CMakeLists.txt files
- Updated test CMakeLists.txt files
- Updated example CMakeLists.txt file

Fixes issue where RUN_OUTPUT_STDOUT_VARIABLE (new in CMake 3.25) was
being used while minimum version was set to 3.16.

Co-authored-by: njzjz <9496702+njzjz@users.noreply.github.com>

Author: Copilot

backend/read_env.py

@@ -46,15 +46,15 @@ def get_argument_from_env() -> tuple[str, list, list, dict, str, str]:
     # get variant option from the environment variables, available: cpu, cuda, rocm
     dp_variant = os.environ.get("DP_VARIANT", "cpu").lower()
     if dp_variant == "cpu" or dp_variant == "":
-        cmake_minimum_required_version = "3.16"
+        cmake_minimum_required_version = "3.25"
     elif dp_variant == "cuda":
-        cmake_minimum_required_version = "3.23"
+        cmake_minimum_required_version = "3.25"
         cmake_args.append("-DUSE_CUDA_TOOLKIT:BOOL=TRUE")
         cuda_root = os.environ.get("CUDAToolkit_ROOT")
         if cuda_root:
             cmake_args.append(f"-DCUDAToolkit_ROOT:STRING={cuda_root}")
     elif dp_variant == "rocm":
-        cmake_minimum_required_version = "3.21"
+        cmake_minimum_required_version = "3.25"
         cmake_args.append("-DUSE_ROCM_TOOLKIT:BOOL=TRUE")
         rocm_root = os.environ.get("ROCM_ROOT")
         if not rocm_root:

doc/install/install-from-source.md

@@ -377,7 +377,7 @@ mkdir build
 cd build
 ```
 
-The installation requires CMake 3.16 or later for the CPU version, CMake 3.23 or later for the CUDA support, and CMake 3.21 or later for the ROCM support. One can install CMake via `pip` if it is not installed or the installed version does not satisfy the requirement:
+The installation requires CMake 3.25 or later for all platforms (CPU, CUDA, and ROCM). One can install CMake via `pip` if it is not installed or the installed version does not satisfy the requirement:
 
 ```sh
 pip install -U cmake

examples/infer_water/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.25)
 project(infer_water)
 
 # find DeePMD-kit

source/CMakeLists.txt

@@ -1,5 +1,5 @@
-# new in 3.16: GET_RUNTIME_DEPENDENCIES, target_precompile_headers
-cmake_minimum_required(VERSION 3.16)
+# new in 3.25: RUN_OUTPUT_STDOUT_VARIABLE
+cmake_minimum_required(VERSION 3.25)
 project(DeePMD)
 
 option(ENABLE_TENSORFLOW "Enable TensorFlow interface" OFF)
@@ -244,7 +244,7 @@ set(DP_VARIANT "cpu")
 
 # define USE_CUDA_TOOLKIT
 if(USE_CUDA_TOOLKIT)
-  cmake_minimum_required(VERSION 3.23)
+  cmake_minimum_required(VERSION 3.25)
   find_package(CUDAToolkit REQUIRED)
   if(NOT DEFINED CMAKE_CUDA_COMPILER)
     set(CMAKE_CUDA_COMPILER ${CUDAToolkit_NVCC_EXECUTABLE})
@@ -261,7 +261,7 @@ endif(USE_CUDA_TOOLKIT)
 
 # define USE_ROCM_TOOLKIT
 if(USE_ROCM_TOOLKIT)
-  cmake_minimum_required(VERSION 3.21)
+  cmake_minimum_required(VERSION 3.25)
   include(CMakeDetermineHIPCompiler)
   list(APPEND CMAKE_PREFIX_PATH ${CMAKE_HIP_COMPILER_ROCM_ROOT})
   find_package(hip REQUIRED)

source/api_c/tests/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.9)
+cmake_minimum_required(VERSION 3.25)
 project(deepmd_api_c_test)
 
 file(GLOB TEST_SRC test_*.cc)

source/api_cc/tests/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.9)
+cmake_minimum_required(VERSION 3.25)
 project(deepmd_api_test)
 
 file(GLOB TEST_SRC test_*.cc)

source/lib/src/gpu/CMakeLists.txt

@@ -1,6 +1,7 @@
 if(USE_CUDA_TOOLKIT)
-  # required cmake version 3.23: CMAKE_CUDA_ARCHITECTURES all
-  cmake_minimum_required(VERSION 3.23)
+  # required cmake version 3.25: CMAKE_CUDA_ARCHITECTURES all,
+  # RUN_OUTPUT_STDOUT_VARIABLE
+  cmake_minimum_required(VERSION 3.25)
   # project name
   project(deepmd_op_cuda)
   set(GPU_LIB_NAME deepmd_op_cuda)
@@ -54,7 +55,7 @@ if(USE_CUDA_TOOLKIT)
 elseif(USE_ROCM_TOOLKIT)
 
   # required cmake version
-  cmake_minimum_required(VERSION 3.21)
+  cmake_minimum_required(VERSION 3.25)
   # project name
   project(deepmd_op_rocm)
   enable_language(HIP)

source/lib/tests/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.9)
+cmake_minimum_required(VERSION 3.25)
 project(libdeepmd_test)
 
 file(GLOB TEST_SRC test_*.cc)

source/lmp/plugin/CMakeLists.txt

@@ -2,7 +2,7 @@ if(DEFINED LAMMPS_SOURCE_ROOT OR DEFINED LAMMPS_VERSION)
   message(STATUS "enable LAMMPS plugin mode")
   add_library(lammps_interface INTERFACE)
   if(DEFINED LAMMPS_VERSION)
-    cmake_minimum_required(VERSION 3.14)
+    cmake_minimum_required(VERSION 3.25)
     include(FetchContent)
     FetchContent_Declare(
       lammps_download