mirror of
https://github.com/pytorch/pytorch.git
synced 2025-10-20 21:14:14 +08:00
63360e64da
Pull Request resolved: https://github.com/pytorch/pytorch/pull/156462 Approved by: https://github.com/ezyang
102 lines
3.2 KiB
Python
102 lines
3.2 KiB
Python
from __future__ import annotations
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import os
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import platform
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from .optional_submodules import checkout_nccl
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from .setup_helpers.cmake import CMake, USE_NINJA
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from .setup_helpers.env import (
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check_env_flag,
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check_negative_env_flag,
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IS_64BIT,
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IS_WINDOWS,
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)
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def _get_vc_env(vc_arch: str) -> dict[str, str]:
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try:
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from setuptools import distutils # type: ignore[import,attr-defined]
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return distutils._msvccompiler._get_vc_env(vc_arch) # type: ignore[no-any-return]
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except AttributeError:
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from setuptools._distutils import (
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_msvccompiler, # type: ignore[import,attr-defined]
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)
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return _msvccompiler._get_vc_env(vc_arch) # type: ignore[no-any-return,attr-defined]
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def _overlay_windows_vcvars(env: dict[str, str]) -> dict[str, str]:
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vc_arch = "x64" if IS_64BIT else "x86"
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if platform.machine() == "ARM64":
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vc_arch = "x64_arm64"
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# First Win11 Windows on Arm build version that supports x64 emulation
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# is 10.0.22000.
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win11_1st_version = (10, 0, 22000)
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current_win_version = tuple(
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int(version_part) for version_part in platform.version().split(".")
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)
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if current_win_version < win11_1st_version:
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vc_arch = "x86_arm64"
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print(
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"Warning: 32-bit toolchain will be used, but 64-bit linker "
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"is recommended to avoid out-of-memory linker error!"
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)
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print(
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"Warning: Please consider upgrading to Win11, where x64 "
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"emulation is enabled!"
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)
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vc_env = _get_vc_env(vc_arch)
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# Keys in `_get_vc_env` are always lowercase.
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# We turn them into uppercase before overlaying vcvars
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# because OS environ keys are always uppercase on Windows.
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# https://stackoverflow.com/a/7797329
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vc_env = {k.upper(): v for k, v in vc_env.items()}
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for k, v in env.items():
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uk = k.upper()
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if uk not in vc_env:
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vc_env[uk] = v
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return vc_env
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def _create_build_env() -> dict[str, str]:
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# XXX - our cmake file sometimes looks at the system environment
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# and not cmake flags!
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# you should NEVER add something to this list. It is bad practice to
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# have cmake read the environment
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my_env = os.environ.copy()
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if IS_WINDOWS and USE_NINJA:
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# When using Ninja under Windows, the gcc toolchain will be chosen as
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# default. But it should be set to MSVC as the user's first choice.
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my_env = _overlay_windows_vcvars(my_env)
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my_env.setdefault("CC", "cl")
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my_env.setdefault("CXX", "cl")
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return my_env
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def build_pytorch(
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version: str | None,
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cmake_python_library: str | None,
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build_python: bool,
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rerun_cmake: bool,
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cmake_only: bool,
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cmake: CMake,
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) -> None:
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my_env = _create_build_env()
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if (
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not check_negative_env_flag("USE_CUDA")
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and not check_negative_env_flag("USE_NCCL")
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and not check_env_flag("USE_SYSTEM_NCCL")
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):
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checkout_nccl()
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build_test = not check_negative_env_flag("BUILD_TEST")
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cmake.generate(
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version, cmake_python_library, build_python, build_test, my_env, rerun_cmake
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)
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if cmake_only:
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return
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cmake.build(my_env)
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