I have a similar issue to the one I was able to solve in here, when building Python3.9.2 in docker container the build finish successfully but ctypes is missing
ModuleNotFoundError: No module named '_ctypes'
Trying the same method in the above post did not worked, I even tried to install the latest libffi-3.3 with the same results, all the libffi headers and libs are in place.
It seems that only the _ctypes_test shared object was build.
root@74f1b419ddd8:/# find / -name _ctypes*
/usr/local/lib/python3.9/lib-dynload/_ctypes_test.cpython-39-x86_64-linux-gnu.so
I found some tickets regarding this but nothing worked for me:
- https://bugs.python.org/issue34823
- https://bugs.python.org/issue14527
- https://bugs.python.org/issue30090
Any idea how I can make it work for the latest Python 3.9?
Update: Tested on Python 3.7.10 & 3.8.8 and it seems to work fine so it probably something that changed on 3.9.*
Update2:
I took the _ctypes.cpython-39-x86_64-linux-gnu.so file from a prebuilt docker pyhton:3.9.2-slim and put it in my container at /usr/local/lib/python3.9/lib-dynload/_ctypes_test.cpython-39-x86_64-linux-gnu.so and it worked, import ctypes did not raised this error (I had to build python with libffi-3.2.1 and not 3.3).
Why I can't get make to build _ctypes?