ImportError: libffi.so.6

[YoSTEALTH]

BPO	40367
Nosy	@merwok, @YoSTEALTH, @FFY00

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2020-05-23.20:10:55.180>
created_at = <Date 2020-04-22.21:03:43.151>
labels = ['ctypes', 'build']
title = 'ImportError: libffi.so.6'
updated_at = <Date 2020-05-23.20:10:55.179>
user = 'https://github.com/YoSTEALTH'

bugs.python.org fields:

activity = <Date 2020-05-23.20:10:55.179>
actor = 'YoSTEALTH'
assignee = 'none'
closed = True
closed_date = <Date 2020-05-23.20:10:55.180>
closer = 'YoSTEALTH'
components = ['ctypes']
creation = <Date 2020-04-22.21:03:43.151>
creator = 'YoSTEALTH'
dependencies = []
files = []
hgrepos = []
issue_num = 40367
keywords = []
message_count = 5.0
messages = ['367048', '367223', '367930', '367931', '369749']
nosy_count = 3.0
nosy_names = ['eric.araujo', 'YoSTEALTH', 'FFY00']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'resolved'
status = 'closed'
superseder = None
type = 'compile error'
url = 'https://bugs.python.org/issue40367'
versions = []

[YoSTEALTH]

>> /opt/python/3.8.1/lib/python3 setup.py build_ext --inplace

Traceback (most recent call last):
  File "./setup.py", line 1, in <module>
    from setuptools import setup, find_packages
  File "/opt/python/3.8.1/lib/python3.8/site-packages/setuptools/__init__.py", line 19, in <module>
    from setuptools.dist import Distribution
  File "/opt/python/3.8.1/lib/python3.8/site-packages/setuptools/dist.py", line 34, in <module>
    from setuptools import windows_support
  File "/opt/python/3.8.1/lib/python3.8/site-packages/setuptools/windows_support.py", line 2, in <module>
    import ctypes
  File "/opt/python/3.8.1/lib/python3.8/ctypes/__init__.py", line 7, in <module>
    from _ctypes import Union, Structure, Array
ImportError: libffi.so.6: cannot open shared object file: No such file or directory

"libffi 3.3-3" on "5.6.5-3-MANJARO" is installed as:

/usr/lib/libffi.so
/usr/lib/libffi.so.7
/usr/lib/libffi.so.7.1.0
...

Maybe _ctypes should try to find "libffi.so" vs "libffi.so.6" ?

[merwok]

How did you get the Python installed in /opt/python/3.8.1?

Maybe it was compiled against libffi 6, then you updated the system to libffi 7, so that Python would need a rebuild.

[FFY00]

Éric's assessment seems correct.

libffi-3.2 (which provided libffi.so.6) got dropped as a dependency from libffi a few weeks ago.

https://git.archlinux.org/svntogit/packages.git/commit/trunk?h=packages/libffi&id=edbab26c1cbebe62bb9a5ef55a5e0eaf3481a399

Add 2 weeks for the Manjaro repos to pull the change. The timing seems correct. You just need to rebuild your python installation in /opt/python/3.8.1 (although having an installation there seems very odd, does the default installation not worlK).

Please let me know if the issue still proceeds after rebuilding, otherwise this should be closed :)

[FFY00]

typo: does the default installation not worlK
*does the default installation not work?

[YoSTEALTH]

How did you get the Python installed in /opt/python/3.8.1?

• I custom installed python.

Maybe it was compiled against libffi 6, then you updated the system to libffi 7, so that Python would need a rebuild.

• Yes, you are right about this.

So i did rebuild and no problems, Thanks :)