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[WIP] bpo-41179: Fix ctypes.util.find_library on macOS Big Sur #21250

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[WIP] bpo-41179: Fix ctypes.util.find_library on macOS Big Sur #21250

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8ea3773
Close Issue41179
sumanthratna Jul 1, 2020
0a2ee77
Only import platform if OS is macOS
sumanthratna Jul 1, 2020
24960b8
Update TODO
sumanthratna Jul 1, 2020
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28 changes: 19 additions & 9 deletions Lib/ctypes/util.py
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Original file line number Diff line number Diff line change
Expand Up @@ -70,15 +70,25 @@ def find_library(name):
elif os.name == "posix" and sys.platform == "darwin":
from ctypes.macholib.dyld import dyld_find as _dyld_find
def find_library(name):
possible = ['lib%s.dylib' % name,
'%s.dylib' % name,
'%s.framework/%s' % (name, name)]
for name in possible:
try:
return _dyld_find(name)
except ValueError:
continue
return None
from platform import mac_ver
macos_version = mac_ver()[0]
if macos_version == '10.16' or macos_version == '11.0':
# see https://bugs.python.org/issue41179
# macOS Big Sur no longer copies dynamic libraries
# TODO (@sumanthratna): we shouldn't change this logic
# https://github.com/python/cpython/blob/0a2ee77547c0e25f081cfb6507a1ab8fecbd683a/Lib/ctypes/macholib/dyld.py#L15-L29
# this probably requires a change to ctypes.macholib.dyld.dyld_find
pass
else:
possible = ['lib%s.dylib' % name,
'%s.dylib' % name,
'%s.framework/%s' % (name, name)]
for name in possible:
try:
return _dyld_find(name)
except ValueError:
continue
return None

elif sys.platform.startswith("aix"):
# AIX has two styles of storing shared libraries
Expand Down