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bpo-21536: C extensions are no longer linked to libpython (GH-12946)

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On Unix, C extensions are no longer linked to libpython.

It is now possible to load a C extension built using a shared library
Python with a statically linked Python.

When Python is embedded, libpython must not be loaded with
RTLD_LOCAL, but RTLD_GLOBAL instead. Previously, using RTLD_LOCAL, it
was already not possible to load C extensions which were not linked
to libpython, like C extensions of the standard library built by the
"*shared*" section of Modules/Setup.

distutils, python-config and python-config.py have been modified.
This commit is contained in:
Victor Stinner 2019-04-25 20:13:10 +02:00 • committed by GitHub
parent d7befad328
commit 8c3ecc6bac
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7 changed files with 28 additions and 26 deletions
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19
Lib/distutils/command/build_ext.py
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@ -714,20 +714,5 @@ class build_ext(Command):
# don't extend ext.libraries, it may be shared with other
# extensions, it is a reference to the original list
return ext.libraries + [pythonlib]
else:
return ext.libraries
elif sys.platform == 'darwin':
# Don't use the default code below
return ext.libraries
elif sys.platform[:3] == 'aix':
# Don't use the default code below
return ext.libraries
else:
from distutils import sysconfig
if sysconfig.get_config_var('Py_ENABLE_SHARED'):
pythonlib = 'python{}.{}{}'.format(
sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff,
sysconfig.get_config_var('ABIFLAGS'))
return ext.libraries + [pythonlib]
else:
return ext.libraries
return ext.libraries