mirror of
https://github.com/zebrajr/pytorch.git
synced 2025-12-07 12:21:27 +01:00
70 lines
2.2 KiB
Python
70 lines
2.2 KiB
Python
import os
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import glob
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import re
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import platform
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import ctypes.util
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from subprocess import Popen, PIPE
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from .env import check_env_flag
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def find_nvcc():
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proc = Popen(['which', 'nvcc'], stdout=PIPE, stderr=PIPE)
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out, err = proc.communicate()
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out = out.decode().strip()
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if len(out) > 0:
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return os.path.dirname(out)
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else:
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return None
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def find_cuda_version(cuda_home):
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if cuda_home is None:
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return None
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# get CUDA lib folder
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cuda_lib_dirs = ['lib64', 'lib']
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for lib_dir in cuda_lib_dirs:
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cuda_lib_path = os.path.join(cuda_home, lib_dir)
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if os.path.exists(cuda_lib_path):
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break
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# get a list of candidates for the version number
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# which are files containing cudart
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candidate_names = list(glob.glob(os.path.join(cuda_lib_path, '*cudart*')))
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candidate_names = [os.path.basename(c) for c in candidate_names]
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# suppose version is MAJOR.MINOR.PATCH, all numbers
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version_regex = re.compile('[0-9]+\.[0-9]+\.[0-9]+')
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candidates = [c.group() for c in map(version_regex.search, candidate_names) if c]
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if len(candidates) > 0:
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# normally only one will be retrieved, take the first result
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return candidates[0]
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# if no candidates were found, try MAJOR.MINOR
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version_regex = re.compile('[0-9]+\.[0-9]+')
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candidates = [c.group() for c in map(version_regex.search, candidate_names) if c]
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if len(candidates) > 0:
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return candidates[0]
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if check_env_flag('NO_CUDA'):
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WITH_CUDA = False
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CUDA_HOME = None
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CUDA_VERSION = None
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else:
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CUDA_HOME = os.getenv('CUDA_HOME', '/usr/local/cuda')
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if not os.path.exists(CUDA_HOME):
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# We use nvcc path on Linux and cudart path on macOS
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osname = platform.system()
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if osname == 'Linux':
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cuda_path = find_nvcc()
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else:
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cudart_path = ctypes.util.find_library('cudart')
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if cudart_path is not None:
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cuda_path = os.path.dirname(cudart_path)
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else:
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cuda_path = None
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if cuda_path is not None:
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CUDA_HOME = os.path.dirname(cuda_path)
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else:
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CUDA_HOME = None
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CUDA_VERSION = find_cuda_version(CUDA_HOME)
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WITH_CUDA = CUDA_HOME is not None
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