allow disabling TensorFlow backend during Python installation

backend/find_tensorflow.py

@@ -127,6 +127,12 @@ def get_tf_requirement(tf_version: str = "") -> dict:
     dict
         TensorFlow requirement, including cpu and gpu.
     """
+    if tf_version is None:
+        return {
+            "cpu": [],
+            "gpu": [],
+            "mpi": [],
+        }
     if tf_version == "":
         tf_version = os.environ.get("TENSORFLOW_VERSION", "")
 

backend/read_env.py

@@ -80,16 +80,26 @@ def get_argument_from_env() -> Tuple[str, list, list, dict, str]:
         cmake_args.append("-DENABLE_IPI:BOOL=TRUE")
         extra_scripts["dp_ipi"] = "deepmd.tf.entrypoints.ipi:dp_ipi"
 
-    tf_install_dir, _ = find_tensorflow()
-    tf_version = get_tf_version(tf_install_dir)
-    if tf_version == "" or Version(tf_version) >= Version("2.12"):
-        find_libpython_requires = []
+    if os.environ.get("DP_ENABLE_TENSORFLOW", "1") == "1":
+        tf_install_dir, _ = find_tensorflow()
+        tf_version = get_tf_version(tf_install_dir)
+        if tf_version == "" or Version(tf_version) >= Version("2.12"):
+            find_libpython_requires = []
+        else:
+            find_libpython_requires = ["find_libpython"]
+        cmake_args.extend(
+            [
+                "-DENABLE_TENSORFLOW=ON",
+                f"-DTENSORFLOW_VERSION={tf_version}",
+                f"-DTENSORFLOW_ROOT:PATH={tf_install_dir}",
+            ]
+        )
     else:
-        find_libpython_requires = ["find_libpython"]
-    cmake_args.append(f"-DTENSORFLOW_VERSION={tf_version}")
+        find_libpython_requires = []
+        cmake_args.append("-DENABLE_TENSORFLOW=OFF")
+        tf_version = None
 
     cmake_args = [
-        f"-DTENSORFLOW_ROOT:PATH={tf_install_dir}",
         "-DBUILD_PY_IF:BOOL=TRUE",
         *cmake_args,
     ]

deepmd/tf/env.py

@@ -472,6 +472,11 @@
 
 
 GLOBAL_CONFIG = _get_package_constants()
+if GLOBAL_CONFIG["enable_tensorflow"] == "0":
+    raise RuntimeError(
+        "TensorFlow backend is not built. To enable it, "
+        "set the environmental variable DP_ENABLE_TENSORFLOW=1."
+    )
 MODEL_VERSION = GLOBAL_CONFIG["model_version"]
 TF_VERSION = GLOBAL_CONFIG["tf_version"]
 TF_CXX11_ABI_FLAG = int(GLOBAL_CONFIG["tf_cxx11_abi_flag"])

doc/install/install-from-source.md

@@ -90,7 +90,17 @@ Check the compiler version on your machine
 gcc --version
 ```
 
-The compiler GCC 4.8 or later is supported in the DeePMD-kit. Note that TensorFlow may have specific requirements for the compiler version to support the C++ standard version and [`_GLIBCXX_USE_CXX11_ABI`](https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html) used by TensorFlow. It is recommended to use [the same compiler version as TensorFlow](https://www.tensorflow.org/install/source#tested_build_configurations), which can be printed by `python -c "import tensorflow;print(tensorflow.version.COMPILER_VERSION)"`.
+The compiler GCC 4.8 or later is supported in the DeePMD-kit.
+
+::::{tab-set}
+
+:::{tab-item} TensorFlow {{ tensorflow_icon }}
+
+Note that TensorFlow may have specific requirements for the compiler version to support the C++ standard version and [`_GLIBCXX_USE_CXX11_ABI`](https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html) used by TensorFlow. It is recommended to use [the same compiler version as TensorFlow](https://www.tensorflow.org/install/source#tested_build_configurations), which can be printed by `python -c "import tensorflow;print(tensorflow.version.COMPILER_VERSION)"`.
+
+:::
+
+::::
 
 Execute
 ```bash
@@ -105,7 +115,8 @@ One may set the following environment variables before executing `pip`:
 | DP_VARIANT            | `cpu`, `cuda`, `rocm`  | `cpu`         | Build CPU variant or GPU variant with CUDA or ROCM support. |
 | CUDAToolkit_ROOT | Path                   | Detected automatically | The path to the CUDA toolkit directory. CUDA 9.0 or later is supported. NVCC is required. |
 | ROCM_ROOT             | Path                   | Detected automatically | The path to the ROCM toolkit directory. |
-| TENSORFLOW_ROOT       | Path                   | Detected automatically | The path to TensorFlow Python library. By default the installer only finds TensorFlow under user site-package directory (`site.getusersitepackages()`) or system site-package directory (`sysconfig.get_path("purelib")`) due to limitation of [PEP-517](https://peps.python.org/pep-0517/). If not found, the latest TensorFlow (or the environment variable `TENSORFLOW_VERSION` if given) from PyPI will be built against.|
+| DP_ENABLE_TENSORFLOW  | 0, 1                   | 1             | {{ tensorflow_icon }} Enable the TensorFlow backend.
+| TENSORFLOW_ROOT       | Path                   | Detected automatically | {{ tensorflow_icon }} The path to TensorFlow Python library. By default the installer only finds TensorFlow under user site-package directory (`site.getusersitepackages()`) or system site-package directory (`sysconfig.get_path("purelib")`) due to limitation of [PEP-517](https://peps.python.org/pep-0517/). If not found, the latest TensorFlow (or the environment variable `TENSORFLOW_VERSION` if given) from PyPI will be built against.|
 | DP_ENABLE_NATIVE_OPTIMIZATION | 0, 1           | 0             | Enable compilation optimization for the native machine's CPU type. Do not enable it if generated code will run on different CPUs. |
 | CMAKE_ARGS             | str                   | -             | Additional CMake arguments |
 | &lt;LANG&gt;FLAGS (`<LANG>`=`CXX`, `CUDA` or `HIP`)   | str            | -             | Default compilation flags to be used when compiling `<LANG>` files. See [CMake documentation](https://cmake.org/cmake/help/latest/variable/CMAKE_LANG_FLAGS.html). |

source/CMakeLists.txt

@@ -165,7 +165,9 @@ if(NOT DEEPMD_C_ROOT)
   if(ENABLE_PYTORCH)
     message(STATUS "- PyTorch")
   endif()
-  if(NOT ENABLE_TENSORFLOW AND NOT ENABLE_PYTORCH)
+  if(NOT ENABLE_TENSORFLOW
+     AND NOT ENABLE_PYTORCH
+     AND NOT BUILD_PY_IF)
     message(FATAL_ERROR "No backend is enabled.")
   endif()
 endif()

source/config/CMakeLists.txt

@@ -1,5 +1,19 @@
 # config
 
+# cmake will treat true, false, on, off, 1, 0 as booleans we hope an easy way to
+# check it
+if(ENABLE_TENSORFLOW)
+  set(ENABLE_TENSORFLOW 1)
+else()
+  set(ENABLE_TENSORFLOW 0)
+endif()
+
+if(ENABLE_PYTORCH)
+  set(ENABLE_PYTORCH 1)
+else()
+  set(ENABLE_PYTORCH 0)
+endif()
+
 configure_file("run_config.ini" "${CMAKE_CURRENT_BINARY_DIR}/run_config.ini"
                @ONLY)
 

source/config/run_config.ini

@@ -4,6 +4,8 @@ GIT_SUMM = @GIT_SUMM@
 GIT_HASH = @GIT_HASH@
 GIT_DATE = @GIT_DATE@
 GIT_BRANCH = @GIT_BRANCH@
+ENABLE_TENSORFLOW = @ENABLE_TENSORFLOW@
+ENABLE_PYTORCH = @ENABLE_PYTORCH@
 TF_INCLUDE_DIR = @TensorFlow_INCLUDE_DIRS@
 TF_LIBS = @TensorFlow_LIBRARY@
 TF_VERSION = @TENSORFLOW_VERSION@

source/lib/src/gpu/CMakeLists.txt

@@ -10,8 +10,10 @@ if(USE_CUDA_TOOLKIT)
   endif()
   enable_language(CUDA)
   set(CMAKE_CUDA_STANDARD 11)
-  add_compile_definitions(
-    "$<$<COMPILE_LANGUAGE:CUDA>:_GLIBCXX_USE_CXX11_ABI=${OP_CXX_ABI}>")
+  if(DEFINED OP_CXX_ABI)
+    add_compile_definitions(
+      "$<$<COMPILE_LANGUAGE:CUDA>:_GLIBCXX_USE_CXX11_ABI=${OP_CXX_ABI}>")
+  endif()
 
   find_package(CUDAToolkit REQUIRED)