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#!/usr/bin/env python3
#
# This script collects a list of symbols that are considered to be part of the
# CPython API. The result is used to inform the macOS linker that it's fine for
# those symbols to be undefined when an extension module is linked, as they
# will be provided when the extension module is loaded into the interpreter.
from urllib.request import urlopen
import re
funcs: "set[str]" = set()
for ver in ['3.7', '3.8', '3.9']:
url = f'https://raw.githubusercontent.com/python/cpython/{ver}/PC/python3.def'
output = urlopen(url).read().decode('utf-8')
for match in re.findall(r" (.*)=.*", output):
funcs.add(match)
for ver in ['3.10', '3.11', 'main']:
url = f'https://raw.githubusercontent.com/python/cpython/{ver}/PC/python3dll.c'
output = urlopen(url).read().decode('utf-8')
for match in re.findall(r"EXPORT_FUNC\((.*)\)", output):
funcs.add(match)
funcs.remove('name')
# Add a few more functions that nanobind uses and which aren't in the above list
funcs |= {
'PyFrame_GetBack',
'PyGILState_Check',
'PyObject_LengthHint',
'Py_CompileStringExFlags',
'_PyInterpreterState_Get',
'_PyObject_MakeTpCall',
'_PyObject_NextNotImplemented',
'_Py_CheckFunctionResult',
'_Py_RefTotal'
}
with open("darwin-ld-cpython.sym", "w") as f:
for func in sorted(list(funcs)):
f.write(f'-U _{func}\n')
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