Message394226
The symbol "PyStructSequence_UnnnamedField" is not *explicitly* marked for export, causing it to be omitted from python3x.dll on Windows -- and thus unavailable to Windows extension modules.
Attempting to use this symbol then fails at link time:
test.obj : error LNK2001: unresolved external symbol PyStructSequence_UnnamedField
build\lib.win-amd64-3.7\test.cp39-win_amd64.pyd : fatal error LNK1120: 1 unresolved externals
The fact that the symbol is missing can also be demonstrated via ctypes:
import ctypes
from pathlib import Path
import sys
python_dll = ctypes.CDLL(str(Path(sys.executable).parent / 'python3.dll'))
# These don't raise at all
python_dll.PyTuple_Type
python_dll.PyStructSequence_New
# Raises AttributeError
python_dll.PyStructSequence_UnnamedField |
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Date |
User |
Action |
Args |
2021-05-23 23:40:00 | johnboy2 | set | recipients:
+ johnboy2, paul.moore, tim.golden, zach.ware, steve.dower |
2021-05-23 23:40:00 | johnboy2 | set | messageid: <1621813200.62.0.269776219006.issue44220@roundup.psfhosted.org> |
2021-05-23 23:40:00 | johnboy2 | link | issue44220 messages |
2021-05-23 23:40:00 | johnboy2 | create | |
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