With fix:

$ /tmp/python311/bin/pip3 install --no-binary :all: cryptography
Collecting cryptography
  Using cached cryptography-36.0.1.tar.gz (572 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... done
Requirement already satisfied: cffi>=1.12 in /tmp/python311/lib/python3.11/site-packages (from cryptography) (1.15.0)
Requirement already satisfied: pycparser in /tmp/python311/lib/python3.11/site-packages (from cffi>=1.12->cryptography) (2.21)
Building wheels for collected packages: cryptography
  Building wheel for cryptography (PEP 517) ... done
  Created wheel for cryptography: filename=cryptography-36.0.1-cp311-cp311-linux_x86_64.whl size=2628351 sha256=fb3cc21f8eaa546cd2c0123ea01a98bf92a9824fcdca36cfcf765b2c044bd186
  Stored in directory: /home/heimes/.cache/pip/wheels/6c/77/a9/3c4762d4e65bef5f742a304c507f9723ca3563a38d108618ad
Successfully built cryptography
Installing collected packages: cryptography
Successfully installed cryptography-36.0.1


Without fix:

  gcc -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/tmp/python311/include/python3.11 -c build/temp.linux-x86_64-3.11/_openssl.c -o build/temp.linux-x86_64-3.11/build/temp.linux-x86_64-3.11/_openssl.o -Wconversion -Wno-error=sign-conversion
  In file included from /tmp/python311/include/python3.11/Python.h:66,
                   from build/temp.linux-x86_64-3.11/_openssl.c:57:
  /tmp/python311/include/python3.11/moduleobject.h:82:3: error: unknown type name ‘PyModuleDef_Slot’
     82 |   PyModuleDef_Slot *m_slots;
        |   ^~~~~~~~~~~~~~~~