Install failed on Raspbian 64 Bit

Tried to install on my Raspberry Pi 4 running Raspbian 64 bit.

Complete output from command /home/pi/chiadog/venv/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-install-85rdwdul/cffi/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /tmp/pip-wheel-g75sangs --python-tag cp37:
    Package libffi was not found in the pkg-config search path.
    Perhaps you should add the directory containing `libffi.pc'
    to the PKG_CONFIG_PATH environment variable
    No package 'libffi' found
    Package libffi was not found in the pkg-config search path.
    Perhaps you should add the directory containing `libffi.pc'
    to the PKG_CONFIG_PATH environment variable
    No package 'libffi' found
    Package libffi was not found in the pkg-config search path.
    Perhaps you should add the directory containing `libffi.pc'
    to the PKG_CONFIG_PATH environment variable
    No package 'libffi' found
    Package libffi was not found in the pkg-config search path.
    Perhaps you should add the directory containing `libffi.pc'
    to the PKG_CONFIG_PATH environment variable
    No package 'libffi' found
    Package libffi was not found in the pkg-config search path.
    Perhaps you should add the directory containing `libffi.pc'
    to the PKG_CONFIG_PATH environment variable
    No package 'libffi' found
    usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
       or: -c --help [cmd1 cmd2 ...]
       or: -c --help-commands
       or: -c cmd --help
  
    error: invalid command 'bdist_wheel'
  
    ----------------------------------------
    Failed building wheel for cffi
    Running setup.py clean for cffi
  Failed to build cffi
  Installing collected packages: setuptools, wheel, pycparser, cffi, semantic-version, toml, setuptools-rust
    Running setup.py install for cffi: started
      Running setup.py install for cffi: finished with status 'error'
      Complete output from command /home/pi/chiadog/venv/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-install-85rdwdul/cffi/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-record-k2ncf00a/install-record.txt --single-version-externally-managed --prefix /tmp/pip-build-env-0wwhbf2l --compile --install-headers /home/pi/chiadog/venv/include/site/python3.7/cffi:
      Package libffi was not found in the pkg-config search path.
      Perhaps you should add the directory containing `libffi.pc'
      to the PKG_CONFIG_PATH environment variable
      No package 'libffi' found
      Package libffi was not found in the pkg-config search path.
      Perhaps you should add the directory containing `libffi.pc'
      to the PKG_CONFIG_PATH environment variable
      No package 'libffi' found
      Package libffi was not found in the pkg-config search path.
      Perhaps you should add the directory containing `libffi.pc'
      to the PKG_CONFIG_PATH environment variable
      No package 'libffi' found
      Package libffi was not found in the pkg-config search path.
      Perhaps you should add the directory containing `libffi.pc'
      to the PKG_CONFIG_PATH environment variable
      No package 'libffi' found
      Package libffi was not found in the pkg-config search path.
      Perhaps you should add the directory containing `libffi.pc'
      to the PKG_CONFIG_PATH environment variable
      No package 'libffi' found
      running install
      running build
      running build_py
      creating build
      creating build/lib.linux-aarch64-3.7
      creating build/lib.linux-aarch64-3.7/cffi
      copying cffi/backend_ctypes.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/commontypes.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/ffiplatform.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/setuptools_ext.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/vengine_gen.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/cffi_opcode.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/pkgconfig.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/error.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/recompiler.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/vengine_cpy.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/cparser.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/model.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/api.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/lock.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/verifier.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/__init__.py -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/_cffi_include.h -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/parse_c_type.h -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/_embedding.h -> build/lib.linux-aarch64-3.7/cffi
      copying cffi/_cffi_errors.h -> build/lib.linux-aarch64-3.7/cffi
      running build_ext
      building '_cffi_backend' extension
      creating build/temp.linux-aarch64-3.7
      creating build/temp.linux-aarch64-3.7/c
      aarch64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DUSE__THREAD -DHAVE_SYNC_SYNCHRONIZE -I/usr/include/ffi -I/usr/include/libffi -I/home/pi/chiadog/venv/include -I/usr/include/python3.7m -c c/_cffi_backend.c -o build/temp.linux-aarch64-3.7/c/_cffi_backend.o
      c/_cffi_backend.c:15:10: fatal error: ffi.h: No such file or directory
       #include <ffi.h>
                ^~~~~~~
      compilation terminated.
      error: command 'aarch64-linux-gnu-gcc' failed with exit status 1
  
      ----------------------------------------
  Command "/home/pi/chiadog/venv/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-install-85rdwdul/cffi/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-record-k2ncf00a/install-record.txt --single-version-externally-managed --prefix /tmp/pip-build-env-0wwhbf2l --compile --install-headers /home/pi/chiadog/venv/include/site/python3.7/cffi" failed with error code 1 in /tmp/pip-install-85rdwdul/cffi/
  
  ----------------------------------------
Command "/home/pi/chiadog/venv/bin/python3 -m pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-0wwhbf2l --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple --extra-index-url https://www.piwheels.org/simple -- setuptools>=40.6.0 wheel "cffi>=1.12; platform_python_implementation != 'PyPy'" setuptools-rust>=0.11.4" failed with error code 1 in None

[chufucious]

Installing libffi6 worked! I had to make sure pip was running latest version too.

I’m up and running now.

Thank you!

[martomi]

I suggest trying to install libffi. Something like: sudo apt-get install libffi7 libffi-dev or libffi6 if your repository doesn’t have 7. It’s a requirement for Paramiko. Usually available by default on Ubuntu.