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Failed building wheel for cryptography

See original GitHub issue

I was trying to install pyopenssl module in Digital Ocean Ubuntu 16.04 server. I am getting this error Failed building wheel for cryptography at the end followed by some errors.

Collecting pyopenssl
  Using cached https://files.pythonhosted.org/packages/9e/de/f8342b68fa9e981d348039954657bdf681b2ab93de27443be51865ffa310/pyOpenSSL-19.1.0-py2.py3-none-any.whl
Collecting cryptography>=2.8 (from pyopenssl)
  Using cached https://files.pythonhosted.org/packages/be/60/da377e1bed002716fb2d5d1d1cab720f298cb33ecff7bf7adea72788e4e4/cryptography-2.8.tar.gz
Requirement already satisfied (use --upgrade to upgrade): six>=1.5.2 in /usr/local/lib/python3.6/dist-packages (from pyopenssl)
Requirement already satisfied (use --upgrade to upgrade): cffi!=1.11.3,>=1.8 in /usr/local/lib/python3.6/dist-packages (from cryptography>=2.8->pyopenssl)
Requirement already satisfied (use --upgrade to upgrade): pycparser in /usr/local/lib/python3.6/dist-packages (from cffi!=1.11.3,>=1.8->cryptography>=2.8->pyopenssl)
Building wheels for collected packages: cryptography
  Running setup.py bdist_wheel for cryptography: started
  Running setup.py bdist_wheel for cryptography: finished with status 'error'
  Complete output from command /usr/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-vxubdrh0/cryptography/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" bdist_wheel -d /tmp/tmp7omz3s7mpip-wheel- --python-tag cp36:
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build/lib.linux-x86_64-3.6
  creating build/lib.linux-x86_64-3.6/cryptography
  copying src/cryptography/utils.py -> build/lib.linux-x86_64-3.6/cryptography
  copying src/cryptography/__init__.py -> build/lib.linux-x86_64-3.6/cryptography
  copying src/cryptography/exceptions.py -> build/lib.linux-x86_64-3.6/cryptography
  copying src/cryptography/fernet.py -> build/lib.linux-x86_64-3.6/cryptography
  copying src/cryptography/__about__.py -> build/lib.linux-x86_64-3.6/cryptography
  creating build/lib.linux-x86_64-3.6/cryptography/x509
  copying src/cryptography/x509/base.py -> build/lib.linux-x86_64-3.6/cryptography/x509
  copying src/cryptography/x509/ocsp.py -> build/lib.linux-x86_64-3.6/cryptography/x509
  copying src/cryptography/x509/general_name.py -> build/lib.linux-x86_64-3.6/cryptography/x509
  copying src/cryptography/x509/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/x509
  copying src/cryptography/x509/certificate_transparency.py -> build/lib.linux-x86_64-3.6/cryptography/x509
  copying src/cryptography/x509/extensions.py -> build/lib.linux-x86_64-3.6/cryptography/x509
  copying src/cryptography/x509/oid.py -> build/lib.linux-x86_64-3.6/cryptography/x509
  copying src/cryptography/x509/name.py -> build/lib.linux-x86_64-3.6/cryptography/x509
  creating build/lib.linux-x86_64-3.6/cryptography/hazmat
  copying src/cryptography/hazmat/_oid.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat
  copying src/cryptography/hazmat/_der.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat
  copying src/cryptography/hazmat/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat
  creating build/lib.linux-x86_64-3.6/cryptography/hazmat/bindings
  copying src/cryptography/hazmat/bindings/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/bindings
  creating build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
  copying src/cryptography/hazmat/primitives/hashes.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
  copying src/cryptography/hazmat/primitives/padding.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
  copying src/cryptography/hazmat/primitives/cmac.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
  copying src/cryptography/hazmat/primitives/keywrap.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
  copying src/cryptography/hazmat/primitives/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
  copying src/cryptography/hazmat/primitives/hmac.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
  copying src/cryptography/hazmat/primitives/constant_time.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
  copying src/cryptography/hazmat/primitives/poly1305.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
  creating build/lib.linux-x86_64-3.6/cryptography/hazmat/backends
  copying src/cryptography/hazmat/backends/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends
  copying src/cryptography/hazmat/backends/interfaces.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends
  creating build/lib.linux-x86_64-3.6/cryptography/hazmat/bindings/openssl
  copying src/cryptography/hazmat/bindings/openssl/_conditional.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/bindings/openssl
  copying src/cryptography/hazmat/bindings/openssl/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/bindings/openssl
  copying src/cryptography/hazmat/bindings/openssl/binding.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/bindings/openssl
  creating build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/serialization
  copying src/cryptography/hazmat/primitives/serialization/base.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/serialization
  copying src/cryptography/hazmat/primitives/serialization/pkcs12.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/serialization
  copying src/cryptography/hazmat/primitives/serialization/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/serialization
  copying src/cryptography/hazmat/primitives/serialization/ssh.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/serialization
  creating build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
  copying src/cryptography/hazmat/primitives/asymmetric/ed25519.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
  copying src/cryptography/hazmat/primitives/asymmetric/padding.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
  copying src/cryptography/hazmat/primitives/asymmetric/dh.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
  copying src/cryptography/hazmat/primitives/asymmetric/x25519.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
  copying src/cryptography/hazmat/primitives/asymmetric/utils.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
  copying src/cryptography/hazmat/primitives/asymmetric/ec.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
  copying src/cryptography/hazmat/primitives/asymmetric/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
  copying src/cryptography/hazmat/primitives/asymmetric/rsa.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
  copying src/cryptography/hazmat/primitives/asymmetric/x448.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
  copying src/cryptography/hazmat/primitives/asymmetric/ed448.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
  copying src/cryptography/hazmat/primitives/asymmetric/dsa.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
  creating build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/twofactor
  copying src/cryptography/hazmat/primitives/twofactor/utils.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/twofactor
  copying src/cryptography/hazmat/primitives/twofactor/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/twofactor
  copying src/cryptography/hazmat/primitives/twofactor/hotp.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/twofactor
  copying src/cryptography/hazmat/primitives/twofactor/totp.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/twofactor
  creating build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/ciphers
  copying src/cryptography/hazmat/primitives/ciphers/base.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/ciphers
  copying src/cryptography/hazmat/primitives/ciphers/modes.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/ciphers
  copying src/cryptography/hazmat/primitives/ciphers/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/ciphers
  copying src/cryptography/hazmat/primitives/ciphers/aead.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/ciphers
  copying src/cryptography/hazmat/primitives/ciphers/algorithms.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/ciphers
  creating build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
  copying src/cryptography/hazmat/primitives/kdf/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
  copying src/cryptography/hazmat/primitives/kdf/hkdf.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
  copying src/cryptography/hazmat/primitives/kdf/pbkdf2.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
  copying src/cryptography/hazmat/primitives/kdf/x963kdf.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
  copying src/cryptography/hazmat/primitives/kdf/concatkdf.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
  copying src/cryptography/hazmat/primitives/kdf/scrypt.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
  copying src/cryptography/hazmat/primitives/kdf/kbkdf.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
  creating build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/hashes.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/ed25519.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/x509.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/ocsp.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/cmac.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/dh.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/x25519.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/utils.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/ec.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/rsa.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/hmac.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/decode_asn1.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/x448.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/aead.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/encode_asn1.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/poly1305.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/ciphers.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/ed448.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/dsa.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  copying src/cryptography/hazmat/backends/openssl/backend.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
  running egg_info
  writing src/cryptography.egg-info/PKG-INFO
  writing dependency_links to src/cryptography.egg-info/dependency_links.txt
  writing requirements to src/cryptography.egg-info/requires.txt
  writing top-level names to src/cryptography.egg-info/top_level.txt
  reading manifest file 'src/cryptography.egg-info/SOURCES.txt'
  reading manifest template 'MANIFEST.in'
  no previously-included directories found matching 'docs/_build'
  warning: no previously-included files found matching 'vectors'
  warning: no previously-included files matching '*' found under directory 'vectors'
  warning: no previously-included files found matching 'azure-pipelines.yml'
  warning: no previously-included files found matching '.azure-pipelines'
  warning: no previously-included files found matching '.travis.yml'
  warning: no previously-included files found matching '.travis'
  warning: no previously-included files matching '*' found under directory '.azure-pipelines'
  warning: no previously-included files matching '*' found under directory '.travis'
  warning: no previously-included files found matching 'release.py'
  warning: no previously-included files found matching '.coveragerc'
  warning: no previously-included files found matching 'codecov.yml'
  warning: no previously-included files found matching 'dev-requirements.txt'
  warning: no previously-included files found matching 'rtd-requirements.txt'
  warning: no previously-included files found matching 'tox.ini'
  writing manifest file 'src/cryptography.egg-info/SOURCES.txt'
  running build_ext
  generating cffi module 'build/temp.linux-x86_64-3.6/_padding.c'
  creating build/temp.linux-x86_64-3.6
  generating cffi module 'build/temp.linux-x86_64-3.6/_constant_time.c'
  generating cffi module 'build/temp.linux-x86_64-3.6/_openssl.c'
  building '_openssl' extension
  creating build/temp.linux-x86_64-3.6/build
  creating build/temp.linux-x86_64-3.6/build/temp.linux-x86_64-3.6
  x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/include/python3.6m -c build/temp.linux-x86_64-3.6/_openssl.c -o build/temp.linux-x86_64-3.6/build/temp.linux-x86_64-3.6/_openssl.o -Wconversion -Wno-error=sign-conversion
  build/temp.linux-x86_64-3.6/_openssl.c:22:24: fatal error: pyconfig.h: No such file or directory
  compilation terminated.
  error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
  
  ----------------------------------------
  Running setup.py clean for cryptography
Failed to build cryptography
Installing collected packages: cryptography, pyopenssl
  Found existing installation: cryptography 1.2.3
    Not uninstalling cryptography at /usr/lib/python3/dist-packages, outside environment /usr
  Running setup.py install for cryptography: started
    Running setup.py install for cryptography: finished with status 'error'
    Complete output from command /usr/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-vxubdrh0/cryptography/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-cb9nh_qa-record/install-record.txt --single-version-externally-managed --compile:
    running install
    running build
    running build_py
    creating build
    creating build/lib.linux-x86_64-3.6
    creating build/lib.linux-x86_64-3.6/cryptography
    copying src/cryptography/utils.py -> build/lib.linux-x86_64-3.6/cryptography
    copying src/cryptography/__init__.py -> build/lib.linux-x86_64-3.6/cryptography
    copying src/cryptography/exceptions.py -> build/lib.linux-x86_64-3.6/cryptography
    copying src/cryptography/fernet.py -> build/lib.linux-x86_64-3.6/cryptography
    copying src/cryptography/__about__.py -> build/lib.linux-x86_64-3.6/cryptography
    creating build/lib.linux-x86_64-3.6/cryptography/x509
    copying src/cryptography/x509/base.py -> build/lib.linux-x86_64-3.6/cryptography/x509
    copying src/cryptography/x509/ocsp.py -> build/lib.linux-x86_64-3.6/cryptography/x509
    copying src/cryptography/x509/general_name.py -> build/lib.linux-x86_64-3.6/cryptography/x509
    copying src/cryptography/x509/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/x509
    copying src/cryptography/x509/certificate_transparency.py -> build/lib.linux-x86_64-3.6/cryptography/x509
    copying src/cryptography/x509/extensions.py -> build/lib.linux-x86_64-3.6/cryptography/x509
    copying src/cryptography/x509/oid.py -> build/lib.linux-x86_64-3.6/cryptography/x509
    copying src/cryptography/x509/name.py -> build/lib.linux-x86_64-3.6/cryptography/x509
    creating build/lib.linux-x86_64-3.6/cryptography/hazmat
    copying src/cryptography/hazmat/_oid.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat
    copying src/cryptography/hazmat/_der.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat
    copying src/cryptography/hazmat/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat
    creating build/lib.linux-x86_64-3.6/cryptography/hazmat/bindings
    copying src/cryptography/hazmat/bindings/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/bindings
    creating build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
    copying src/cryptography/hazmat/primitives/hashes.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
    copying src/cryptography/hazmat/primitives/padding.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
    copying src/cryptography/hazmat/primitives/cmac.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
    copying src/cryptography/hazmat/primitives/keywrap.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
    copying src/cryptography/hazmat/primitives/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
    copying src/cryptography/hazmat/primitives/hmac.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
    copying src/cryptography/hazmat/primitives/constant_time.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
    copying src/cryptography/hazmat/primitives/poly1305.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives
    creating build/lib.linux-x86_64-3.6/cryptography/hazmat/backends
    copying src/cryptography/hazmat/backends/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends
    copying src/cryptography/hazmat/backends/interfaces.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends
    creating build/lib.linux-x86_64-3.6/cryptography/hazmat/bindings/openssl
    copying src/cryptography/hazmat/bindings/openssl/_conditional.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/bindings/openssl
    copying src/cryptography/hazmat/bindings/openssl/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/bindings/openssl
    copying src/cryptography/hazmat/bindings/openssl/binding.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/bindings/openssl
    creating build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/serialization
    copying src/cryptography/hazmat/primitives/serialization/base.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/serialization
    copying src/cryptography/hazmat/primitives/serialization/pkcs12.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/serialization
    copying src/cryptography/hazmat/primitives/serialization/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/serialization
    copying src/cryptography/hazmat/primitives/serialization/ssh.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/serialization
    creating build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
    copying src/cryptography/hazmat/primitives/asymmetric/ed25519.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
    copying src/cryptography/hazmat/primitives/asymmetric/padding.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
    copying src/cryptography/hazmat/primitives/asymmetric/dh.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
    copying src/cryptography/hazmat/primitives/asymmetric/x25519.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
    copying src/cryptography/hazmat/primitives/asymmetric/utils.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
    copying src/cryptography/hazmat/primitives/asymmetric/ec.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
    copying src/cryptography/hazmat/primitives/asymmetric/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
    copying src/cryptography/hazmat/primitives/asymmetric/rsa.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
    copying src/cryptography/hazmat/primitives/asymmetric/x448.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
    copying src/cryptography/hazmat/primitives/asymmetric/ed448.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
    copying src/cryptography/hazmat/primitives/asymmetric/dsa.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/asymmetric
    creating build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/twofactor
    copying src/cryptography/hazmat/primitives/twofactor/utils.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/twofactor
    copying src/cryptography/hazmat/primitives/twofactor/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/twofactor
    copying src/cryptography/hazmat/primitives/twofactor/hotp.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/twofactor
    copying src/cryptography/hazmat/primitives/twofactor/totp.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/twofactor
    creating build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/ciphers
    copying src/cryptography/hazmat/primitives/ciphers/base.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/ciphers
    copying src/cryptography/hazmat/primitives/ciphers/modes.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/ciphers
    copying src/cryptography/hazmat/primitives/ciphers/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/ciphers
    copying src/cryptography/hazmat/primitives/ciphers/aead.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/ciphers
    copying src/cryptography/hazmat/primitives/ciphers/algorithms.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/ciphers
    creating build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
    copying src/cryptography/hazmat/primitives/kdf/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
    copying src/cryptography/hazmat/primitives/kdf/hkdf.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
    copying src/cryptography/hazmat/primitives/kdf/pbkdf2.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
    copying src/cryptography/hazmat/primitives/kdf/x963kdf.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
    copying src/cryptography/hazmat/primitives/kdf/concatkdf.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
    copying src/cryptography/hazmat/primitives/kdf/scrypt.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
    copying src/cryptography/hazmat/primitives/kdf/kbkdf.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/primitives/kdf
    creating build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/hashes.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/ed25519.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/x509.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/ocsp.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/cmac.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/dh.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/x25519.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/utils.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/ec.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/__init__.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/rsa.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/hmac.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/decode_asn1.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/x448.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/aead.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/encode_asn1.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/poly1305.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/ciphers.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/ed448.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/dsa.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    copying src/cryptography/hazmat/backends/openssl/backend.py -> build/lib.linux-x86_64-3.6/cryptography/hazmat/backends/openssl
    running egg_info
    writing src/cryptography.egg-info/PKG-INFO
    writing dependency_links to src/cryptography.egg-info/dependency_links.txt
    writing requirements to src/cryptography.egg-info/requires.txt
    writing top-level names to src/cryptography.egg-info/top_level.txt
    reading manifest file 'src/cryptography.egg-info/SOURCES.txt'
    reading manifest template 'MANIFEST.in'
    no previously-included directories found matching 'docs/_build'
    warning: no previously-included files found matching 'vectors'
    warning: no previously-included files matching '*' found under directory 'vectors'
    warning: no previously-included files found matching 'azure-pipelines.yml'
    warning: no previously-included files found matching '.azure-pipelines'
    warning: no previously-included files found matching '.travis.yml'
    warning: no previously-included files found matching '.travis'
    warning: no previously-included files matching '*' found under directory '.azure-pipelines'
    warning: no previously-included files matching '*' found under directory '.travis'
    warning: no previously-included files found matching 'release.py'
    warning: no previously-included files found matching '.coveragerc'
    warning: no previously-included files found matching 'codecov.yml'
    warning: no previously-included files found matching 'dev-requirements.txt'
    warning: no previously-included files found matching 'rtd-requirements.txt'
    warning: no previously-included files found matching 'tox.ini'
    writing manifest file 'src/cryptography.egg-info/SOURCES.txt'
    running build_ext
    generating cffi module 'build/temp.linux-x86_64-3.6/_padding.c'
    creating build/temp.linux-x86_64-3.6
    generating cffi module 'build/temp.linux-x86_64-3.6/_constant_time.c'
    generating cffi module 'build/temp.linux-x86_64-3.6/_openssl.c'
    building '_openssl' extension
    creating build/temp.linux-x86_64-3.6/build
    creating build/temp.linux-x86_64-3.6/build/temp.linux-x86_64-3.6
    x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/include/python3.6m -c build/temp.linux-x86_64-3.6/_openssl.c -o build/temp.linux-x86_64-3.6/build/temp.linux-x86_64-3.6/_openssl.o -Wconversion -Wno-error=sign-conversion
    build/temp.linux-x86_64-3.6/_openssl.c:22:24: fatal error: pyconfig.h: No such file or directory
    compilation terminated.
    error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
    
    ----------------------------------------

This problem was also coming while doing pip3 install cryptography and but it went away when I added all dependencies with this command -

sudo apt-get install python-pip python-dev libffi-dev libssl-dev libxml2-dev libxslt1-dev libjpeg8-dev zlib1g-dev

What I am missing here.

Issue Analytics

  • State:closed
  • Created 4 years ago
  • Comments:5 (1 by maintainers)

github_iconTop GitHub Comments

1reaction
tirancommented, Dec 5, 2019

You are missing build dependencies for Python 3. Try install python3-dev

0reactions
aeron7commented, Dec 7, 2019

I had done that. Didn’t solved that moment being for some reason.

Read more comments on GitHub >

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