in build2cmake/src/templates/cuda/setup.py [0:0]
def build_extension(self, ext: CMakeExtension) -> None:
ext_fullpath = Path.cwd() / self.get_ext_fullpath(ext.name)
extdir = ext_fullpath.parent.resolve()
debug = int(os.environ.get("DEBUG", 0)) if self.debug is None else self.debug
cfg = "Debug" if debug else "Release"
cmake_generator = os.environ.get("CMAKE_GENERATOR", "")
# Set Python_EXECUTABLE instead if you use PYBIND11_FINDPYTHON
# EXAMPLE_VERSION_INFO shows you how to pass a value into the C++ code
# from Python.
cmake_args = [
f"-DCMAKE_LIBRARY_OUTPUT_DIRECTORY={extdir}{os.sep}",
f"-DPython_EXECUTABLE={sys.executable}",
f"-DCMAKE_BUILD_TYPE={cfg}", # not used on MSVC, but no harm
]
build_args = []
if "CMAKE_ARGS" in os.environ:
cmake_args += [item for item in os.environ["CMAKE_ARGS"].split(" ") if item]
if not cmake_generator or cmake_generator == "Ninja":
try:
import ninja
ninja_executable_path = Path(ninja.BIN_DIR) / "ninja"
cmake_args += [
"-GNinja",
f"-DCMAKE_MAKE_PROGRAM:FILEPATH={ninja_executable_path}",
]
except ImportError:
pass
if is_sccache_available():
cmake_args += [
"-DCMAKE_C_COMPILER_LAUNCHER=sccache",
"-DCMAKE_CXX_COMPILER_LAUNCHER=sccache",
"-DCMAKE_CUDA_COMPILER_LAUNCHER=sccache",
"-DCMAKE_HIP_COMPILER_LAUNCHER=sccache",
]
elif is_ccache_available():
cmake_args += [
"-DCMAKE_C_COMPILER_LAUNCHER=ccache",
"-DCMAKE_CXX_COMPILER_LAUNCHER=ccache",
"-DCMAKE_CUDA_COMPILER_LAUNCHER=ccache",
"-DCMAKE_HIP_COMPILER_LAUNCHER=ccache",
]
num_jobs = os.getenv("MAX_JOBS", None)
if num_jobs is not None:
num_jobs = int(num_jobs)
logger.info("Using MAX_JOBS=%d as the number of jobs.", num_jobs)
else:
try:
# os.sched_getaffinity() isn't universally available, so fall
# back to os.cpu_count() if we get an error here.
num_jobs = len(os.sched_getaffinity(0))
except AttributeError:
num_jobs = os.cpu_count()
nvcc_threads = os.getenv("NVCC_THREADS", None)
if nvcc_threads is not None:
nvcc_threads = int(nvcc_threads)
logger.info(
"Using NVCC_THREADS=%d as the number of nvcc threads.", nvcc_threads
)
else:
nvcc_threads = 1
num_jobs = max(1, num_jobs // nvcc_threads)
build_args += [f"-j{num_jobs}"]
if sys.platform == "win32":
build_args += ["--config", cfg]
if nvcc_threads:
cmake_args += ["-DNVCC_THREADS={}".format(nvcc_threads)]
build_temp = Path(self.build_temp) / ext.name
if not build_temp.exists():
build_temp.mkdir(parents=True)
subprocess.run(
["cmake", ext.sourcedir, *cmake_args], cwd=build_temp, check=True
)
subprocess.run(
["cmake", "--build", ".", *build_args], cwd=build_temp, check=True
)
if sys.platform == "win32":
# Move the dylib one folder up for discovery.
for filename in os.listdir(extdir / cfg):
move(extdir / cfg / filename, extdir / filename)