Develop Reference

How do you install flask-sqlalchemy in a virtual environment while working with Cygwin?

I use Cygwin terminal on Win7 OS. You can see my python3 and pip3 versions below.
(env)
user ~/env
$ python3 --version
Python 3.9.10
(env)
user ~/env
$ pip3 --version
pip 21.3.1 from /home/user/env/lib/python3.9/site-packages/pip (python 3.9)
I was trying to install flask addons and when I hit
pip3 install flask flask-sqlalchemy
It gives the result below. Could you please name the problem? Also please know that I'm working in a virtual environment.
$ pip3 install flask flask-sqlalchemy
Requirement already satisfied: flask in ./lib/python3.9/site-packages (2.0.2)
Collecting flask-sqlalchemy
Using cached Flask_SQLAlchemy-2.5.1-py2.py3-none-any.whl (17 kB)
Requirement already satisfied: click>=7.1.2 in ./lib/python3.9/site-packages (from flask) (8.0.3)
Requirement already satisfied: itsdangerous>=2.0 in ./lib/python3.9/site-packages (from flask) (2.0.1)
Requirement already satisfied: Werkzeug>=2.0 in ./lib/python3.9/site-packages (from flask) (2.0.2)
Requirement already satisfied: Jinja2>=3.0 in ./lib/python3.9/site-packages (from flask) (3.0.3)
Collecting SQLAlchemy>=0.8.0
Using cached SQLAlchemy-1.4.31-cp39-cp39-cygwin_3_3_3_x86_64.whl
Requirement already satisfied: MarkupSafe>=2.0 in ./lib/python3.9/site-packages (from Jinja2>=3.0->flask) (2.0.1)
Collecting greenlet!=0.4.17
Using cached greenlet-1.1.2.tar.gz (91 kB)
Preparing metadata (setup.py) ... done
Building wheels for collected packages: greenlet
Building wheel for greenlet (setup.py) ... error
ERROR: Command errored out with exit status 1:
command: /home/user/env/bin/python -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-2ej14c7c/greenlet_611bde6e44b84ce894d7dff8b18c2a96/setup.py'"'"'; __file__='"'"'/tmp/pip-install-2ej14c7c/greenlet_611bde6e44b84ce894d7dff8b18c2a96/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /tmp/pip-wheel-2zv1me05
cwd: /tmp/pip-install-2ej14c7c/greenlet_611bde6e44b84ce894d7dff8b18c2a96/
Complete output (71 lines):
running bdist_wheel
running build
running build_py
creating build
creating build/lib.cygwin-3.3.3-x86_64-3.9
creating build/lib.cygwin-3.3.3-x86_64-3.9/greenlet
copying src/greenlet/__init__.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet
creating build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_contextvars.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_cpp.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_extension_interface.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_gc.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_generator.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_generator_nested.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_greenlet.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_leaks.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_stack_saved.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_throw.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_tracing.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_version.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_weakref.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/__init__.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
running egg_info
no previously-included directories found matching 'docs/_build'
warning: no files found matching '*.py' under directory 'appveyor'
warning: no previously-included files matching '*.pyc' found anywhere in distribution
warning: no previously-included files matching '*.pyd' found anywhere in distribution
warning: no previously-included files matching '*.so' found anywhere in distribution
warning: no previously-included files matching '.coverage' found anywhere in distribution
writing manifest file 'src/greenlet.egg-info/SOURCES.txt'
copying src/greenlet/greenlet.c -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet
copying src/greenlet/greenlet.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet
copying src/greenlet/slp_platformselect.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet
creating build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/setup_switch_x64_masm.cmd -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_aarch64_gcc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_alpha_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_amd64_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_arm32_gcc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_arm32_ios.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_csky_gcc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_m68k_gcc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_mips_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_ppc64_aix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_ppc64_linux.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_ppc_aix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_ppc_linux.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_ppc_macosx.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_ppc_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_riscv_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_s390_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_sparc_sun_gcc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_x32_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_x64_masm.asm -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_x64_masm.obj -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_x64_msvc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_x86_msvc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_x86_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/tests/_test_extension.c -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/_test_extension_cpp.cpp -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
running build_ext
creating build/temp.cygwin-3.3.3-x86_64-3.9
creating build/temp.cygwin-3.3.3-x86_64-3.9/src
creating build/temp.cygwin-3.3.3-x86_64-3.9/src/greenlet
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -I/home/user/env/include -I/usr/include/python3.9 -c src/greenlet/greenlet.c -o build/temp.cygwin-3.3.3-x86_64-3.9/src/greenlet/greenlet.o
In file included from src/greenlet/greenlet.c:11:
src/greenlet/greenlet.h:8:10: fatal error: Python.h: No such file or directory
8 | #include <Python.h>
| ^~~~~~~~~~
compilation terminated.
error: command '/usr/bin/gcc' failed with exit code 1
----------------------------------------
ERROR: Failed building wheel for greenlet
Running setup.py clean for greenlet
Failed to build greenlet
Installing collected packages: greenlet, SQLAlchemy, flask-sqlalchemy
Running setup.py install for greenlet ... error
ERROR: Command errored out with exit status 1:
command: /home/user/env/bin/python/env/bin/python -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-2ej14c7c/greenlet_611bde6e44b84ce894d7dff8b18c2a96/setup.py'"'"'; __file__='"'"'/tmp/pip-install-2ej14c7c/greenlet_611bde6e44b84ce894d7dff8b18c2a96/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-fgk4qhlk/install-record.txt --single-version-externally-managed --compile --install-headers /home/user/env/include/site/python3.9/greenlet
cwd: /tmp/pip-install-2ej14c7c/greenlet_611bde6e44b84ce894d7dff8b18c2a96/
Complete output (73 lines):
running install
/home/user/env/bin/python/env/lib/python3.9/site-packages/setuptools/command/install.py:34: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
warnings.warn(
running build
running build_py
creating build
creating build/lib.cygwin-3.3.3-x86_64-3.9
creating build/lib.cygwin-3.3.3-x86_64-3.9/greenlet
copying src/greenlet/__init__.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet
creating build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_contextvars.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_cpp.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_extension_interface.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_gc.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_generator.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_generator_nested.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_greenlet.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_leaks.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_stack_saved.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_throw.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_tracing.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_version.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/test_weakref.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/__init__.py -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
running egg_info
no previously-included directories found matching 'docs/_build'
warning: no files found matching '*.py' under directory 'appveyor'
warning: no previously-included files matching '*.pyc' found anywhere in distribution
warning: no previously-included files matching '*.pyd' found anywhere in distribution
warning: no previously-included files matching '*.so' found anywhere in distribution
warning: no previously-included files matching '.coverage' found anywhere in distribution
writing manifest file 'src/greenlet.egg-info/SOURCES.txt'
copying src/greenlet/greenlet.c -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet
copying src/greenlet/greenlet.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet
copying src/greenlet/slp_platformselect.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet
creating build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/setup_switch_x64_masm.cmd -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_aarch64_gcc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_alpha_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_amd64_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_arm32_gcc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_arm32_ios.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_csky_gcc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_m68k_gcc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_mips_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_ppc64_aix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_ppc64_linux.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_ppc_aix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_ppc_linux.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_ppc_macosx.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_ppc_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_riscv_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_s390_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_sparc_sun_gcc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_x32_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_x64_masm.asm -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_x64_masm.obj -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_x64_msvc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_x86_msvc.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/platform/switch_x86_unix.h -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/platform
copying src/greenlet/tests/_test_extension.c -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
copying src/greenlet/tests/_test_extension_cpp.cpp -> build/lib.cygwin-3.3.3-x86_64-3.9/greenlet/tests
running build_ext
creating build/temp.cygwin-3.3.3-x86_64-3.9
creating build/temp.cygwin-3.3.3-x86_64-3.9/src
creating build/temp.cygwin-3.3.3-x86_64-3.9/src/greenlet
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -I/home/user/env/include -I/usr/include/python3.9 -c src/greenlet/greenlet.c -o build/temp.cygwin-3.3.3-x86_64-3.9/src/greenlet/greenlet.o
In file included from src/greenlet/greenlet.c:11:
src/greenlet/greenlet.h:8:10: fatal error: Python.h: No such file or directory
8 | #include <Python.h>
| ^~~~~~~~~~
compilation terminated.
error: command '/usr/bin/gcc' failed with exit code 1
----------------------------------------
ERROR: Command errored out with exit status 1: /home/user/env/bin/python -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-2ej14c7c/greenlet_611bde6e44b84ce894d7dff8b18c2a96/setup.py'"'"'; __file__='"'"'/tmp/pip-install-2ej14c7c/greenlet_611bde6e44b84ce894d7dff8b18c2a96/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-fgk4qhlk/install-record.txt --single-version-externally-managed --compile --install-headers /home/user/env/include/site/python3.9/greenlet Check the logs for full command output.

Issue installing cryptography on Raspberry Pi 2B (armv7h Arch Linux ARM) (python 3.9.8)

I'm having some trouble installing the python cryptography package on my raspberry pi, specifically with python version 3.9.8 (installed with pyenv). The cryptography package is installed on my system using pacman (python-cryptography package), and thus works using the main python interpreter (3.10.1). However, I need some version of python 3.9 specifically for another package I am using in this project. Any time I try to install cryptography through the python 3.9.8 environment, I get the following error:
Building wheels for collected packages: cryptography
Building wheel for cryptography (pyproject.toml): started
Building wheel for cryptography (pyproject.toml): finished with status 'error'
Failed to build cryptography
ERROR: Command errored out with exit status 1:
command: /home/kioskuser/.local/share/virtualenvs/Kivy-Raspi-Desktop-App-EzpaxvF4/bin/python /home/kioskuser/.local/share/virtualenvs/Kivy-Raspi-Desktop-App-EzpaxvF4/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/_in_process.py build_wheel /tmp/tmp4zxk3vu2
cwd: /tmp/pip-install-c5oajf7r/cryptography_5c58967b948d4a78862f30763d6e3c9e
Complete output (163 lines):
running bdist_wheel
running build
running build_py
creating build
creating build/lib.linux-armv7l-3.9
creating build/lib.linux-armv7l-3.9/cryptography
copying src/cryptography/utils.py -> build/lib.linux-armv7l-3.9/cryptography
copying src/cryptography/fernet.py -> build/lib.linux-armv7l-3.9/cryptography
copying src/cryptography/exceptions.py -> build/lib.linux-armv7l-3.9/cryptography
copying src/cryptography/__init__.py -> build/lib.linux-armv7l-3.9/cryptography
copying src/cryptography/__about__.py -> build/lib.linux-armv7l-3.9/cryptography
creating build/lib.linux-armv7l-3.9/cryptography/x509
copying src/cryptography/x509/oid.py -> build/lib.linux-armv7l-3.9/cryptography/x509
copying src/cryptography/x509/ocsp.py -> build/lib.linux-armv7l-3.9/cryptography/x509
copying src/cryptography/x509/name.py -> build/lib.linux-armv7l-3.9/cryptography/x509
copying src/cryptography/x509/general_name.py -> build/lib.linux-armv7l-3.9/cryptography/x509
copying src/cryptography/x509/extensions.py -> build/lib.linux-armv7l-3.9/cryptography/x509
copying src/cryptography/x509/certificate_transparency.py -> build/lib.linux-armv7l-3.9/cryptography/x509
copying src/cryptography/x509/base.py -> build/lib.linux-armv7l-3.9/cryptography/x509
copying src/cryptography/x509/__init__.py -> build/lib.linux-armv7l-3.9/cryptography/x509
creating build/lib.linux-armv7l-3.9/cryptography/hazmat
copying src/cryptography/hazmat/_oid.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat
copying src/cryptography/hazmat/__init__.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat
creating build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/poly1305.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/padding.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/keywrap.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/hmac.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/hashes.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/constant_time.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/cmac.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/_serialization.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/_cipheralgorithm.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/_asymmetric.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/__init__.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives
creating build/lib.linux-armv7l-3.9/cryptography/hazmat/bindings
copying src/cryptography/hazmat/bindings/__init__.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/bindings
creating build/lib.linux-armv7l-3.9/cryptography/hazmat/backends
copying src/cryptography/hazmat/backends/interfaces.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends
copying src/cryptography/hazmat/backends/__init__.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends
creating build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/twofactor
copying src/cryptography/hazmat/primitives/twofactor/totp.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/twofactor
copying src/cryptography/hazmat/primitives/twofactor/hotp.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/twofactor
copying src/cryptography/hazmat/primitives/twofactor/__init__.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/twofactor
creating build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/serialization
copying src/cryptography/hazmat/primitives/serialization/ssh.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/serialization
copying src/cryptography/hazmat/primitives/serialization/pkcs7.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/serialization
copying src/cryptography/hazmat/primitives/serialization/pkcs12.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/serialization
copying src/cryptography/hazmat/primitives/serialization/base.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/serialization
copying src/cryptography/hazmat/primitives/serialization/__init__.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/serialization
creating build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/kdf
copying src/cryptography/hazmat/primitives/kdf/x963kdf.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/kdf
copying src/cryptography/hazmat/primitives/kdf/scrypt.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/kdf
copying src/cryptography/hazmat/primitives/kdf/pbkdf2.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/kdf
copying src/cryptography/hazmat/primitives/kdf/kbkdf.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/kdf
copying src/cryptography/hazmat/primitives/kdf/hkdf.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/kdf
copying src/cryptography/hazmat/primitives/kdf/concatkdf.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/kdf
copying src/cryptography/hazmat/primitives/kdf/__init__.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/kdf
creating build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/ciphers
copying src/cryptography/hazmat/primitives/ciphers/modes.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/ciphers
copying src/cryptography/hazmat/primitives/ciphers/base.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/ciphers
copying src/cryptography/hazmat/primitives/ciphers/algorithms.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/ciphers
copying src/cryptography/hazmat/primitives/ciphers/aead.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/ciphers
copying src/cryptography/hazmat/primitives/ciphers/__init__.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/ciphers
creating build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/x448.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/x25519.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/utils.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/types.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/rsa.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/padding.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/ed448.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/ed25519.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/ec.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/dsa.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/dh.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/__init__.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/primitives/asymmetric
creating build/lib.linux-armv7l-3.9/cryptography/hazmat/bindings/openssl
copying src/cryptography/hazmat/bindings/openssl/binding.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/bindings/openssl
copying src/cryptography/hazmat/bindings/openssl/_conditional.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/bindings/openssl
copying src/cryptography/hazmat/bindings/openssl/__init__.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/bindings/openssl
creating build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/x509.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/x448.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/x25519.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/utils.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/rsa.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/poly1305.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/hmac.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/hashes.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/encode_asn1.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/ed448.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/ed25519.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/ec.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/dsa.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/dh.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/decode_asn1.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/cmac.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/ciphers.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/backend.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/aead.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/__init__.py -> build/lib.linux-armv7l-3.9/cryptography/hazmat/backends/openssl
running egg_info
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 matching '*' found under directory '.github'
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 '.readthedocs.yml'
warning: no previously-included files found matching 'dev-requirements.txt'
warning: no previously-included files found matching 'tox.ini'
warning: no previously-included files found matching 'mypy.ini'
warning: no previously-included files matching '*' found under directory '.zuul.d'
warning: no previously-included files matching '*' found under directory '.zuul.playbooks'
writing manifest file 'src/cryptography.egg-info/SOURCES.txt'
copying src/cryptography/py.typed -> build/lib.linux-armv7l-3.9/cryptography
creating build/lib.linux-armv7l-3.9/cryptography/hazmat/bindings/_rust
copying src/cryptography/hazmat/bindings/_rust/__init__.pyi -> build/lib.linux-armv7l-3.9/cryptography/hazmat/bindings/_rust
copying src/cryptography/hazmat/bindings/_rust/asn1.pyi -> build/lib.linux-armv7l-3.9/cryptography/hazmat/bindings/_rust
copying src/cryptography/hazmat/bindings/_rust/ocsp.pyi -> build/lib.linux-armv7l-3.9/cryptography/hazmat/bindings/_rust
copying src/cryptography/hazmat/bindings/_rust/x509.pyi -> build/lib.linux-armv7l-3.9/cryptography/hazmat/bindings/_rust
warning: build_py: byte-compiling is disabled, skipping.
running build_ext
cargo rustc --lib --manifest-path src/rust/Cargo.toml --release -v --features pyo3/abi3-py36 pyo3/extension-module -- --crate-type cdylib
Compiling proc-macro2 v1.0.32
Compiling unicode-xid v0.2.2
Compiling syn v1.0.81
Compiling autocfg v1.0.1
Running `rustc --crate-name build_script_build --edition=2018 /home/kioskuser/.cargo/registry/src/github.com-1285ae84e5963aae/proc-macro2-1.0.32/build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debug-assertions=off -C overflow-checks=on --cfg 'feature="default"' --cfg 'feature="proc-macro"' -C metadata=7a95d32b66ae1a1f -C extra-filename=-7a95d32b66ae1a1f --out-dir /tmp/pip-install-c5oajf7r/cryptography_5c58967b948d4a78862f30763d6e3c9e/src/rust/target/release/build/proc-macro2-7a95d32b66ae1a1f -L dependency=/tmp/pip-install-c5oajf7r/cryptography_5c58967b948d4a78862f30763d6e3c9e/src/rust/target/release/deps --cap-lints allow`
Running `rustc --crate-name unicode_xid /home/kioskuser/.cargo/registry/src/github.com-1285ae84e5963aae/unicode-xid-0.2.2/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debug-assertions=off -C overflow-checks=on --cfg 'feature="default"' -C metadata=2b7724452eebc032 -C extra-filename=-2b7724452eebc032 --out-dir /tmp/pip-install-c5oajf7r/cryptography_5c58967b948d4a78862f30763d6e3c9e/src/rust/target/release/deps -L dependency=/tmp/pip-install-c5oajf7r/cryptography_5c58967b948d4a78862f30763d6e3c9e/src/rust/target/release/deps --cap-lints allow`
Running `rustc --crate-name build_script_build --edition=2018 /home/kioskuser/.cargo/registry/src/github.com-1285ae84e5963aae/syn-1.0.81/build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debug-assertions=off -C overflow-checks=on --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' -C metadata=6954389b44e215f9 -C extra-filename=-6954389b44e215f9 --out-dir /tmp/pip-install-c5oajf7r/cryptography_5c58967b948d4a78862f30763d6e3c9e/src/rust/target/release/build/syn-6954389b44e215f9 -L dependency=/tmp/pip-install-c5oajf7r/cryptography_5c58967b948d4a78862f30763d6e3c9e/src/rust/target/release/deps --cap-lints allow`
Running `rustc --crate-name autocfg /home/kioskuser/.cargo/registry/src/github.com-1285ae84e5963aae/autocfg-1.0.1/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debug-assertions=off -C overflow-checks=on -C metadata=062cd71dd028816e -C extra-filename=-062cd71dd028816e --out-dir /tmp/pip-install-c5oajf7r/cryptography_5c58967b948d4a78862f30763d6e3c9e/src/rust/target/release/deps -L dependency=/tmp/pip-install-c5oajf7r/cryptography_5c58967b948d4a78862f30763d6e3c9e/src/rust/target/release/deps --cap-lints allow`
error: could not compile `unicode-xid`
Caused by:
process didn't exit successfully: `rustc --crate-name unicode_xid /home/kioskuser/.cargo/registry/src/github.com-1285ae84e5963aae/unicode-xid-0.2.2/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debug-assertions=off -C overflow-checks=on --cfg 'feature="default"' -C metadata=2b7724452eebc032 -C extra-filename=-2b7724452eebc032 --out-dir /tmp/pip-install-c5oajf7r/cryptography_5c58967b948d4a78862f30763d6e3c9e/src/rust/target/release/deps -L dependency=/tmp/pip-install-c5oajf7r/cryptography_5c58967b948d4a78862f30763d6e3c9e/src/rust/target/release/deps --cap-lints allow` (signal: 4, SIGILL: illegal instruction)
warning: build failed, waiting for other jobs to finish...
error: build failed
=============================DEBUG ASSISTANCE=============================
If you are seeing a compilation error please try the following steps to
successfully install cryptography:
1) Upgrade to the latest pip and try again. This will fix errors for most
users. See: https://pip.pypa.io/en/stable/installing/#upgrading-pip
2) Read https://cryptography.io/en/latest/installation/ for specific
instructions for your platform.
3) Check our frequently asked questions for more information:
https://cryptography.io/en/latest/faq/
4) Ensure you have a recent Rust toolchain installed:
https://cryptography.io/en/latest/installation/#rust
Python: 3.9.8
platform: Linux-5.10.90-1-rpi-ARCH-armv7l-with-glibc2.32
pip: n/a
setuptools: 60.5.0
setuptools_rust: 1.1.2
=============================DEBUG ASSISTANCE=============================
error: cargo failed with code: 101
----------------------------------------
ERROR: Failed building wheel for cryptography
ERROR: Could not build wheels for cryptography, which is required to install pyproject.toml-based projects
✘ Installation Failed
So far I have tried:
Upgrading pip (now version 21.3.1)
Ensuring a rust compiler is installed (rustc version 1.57.0)
Ensure libffi is installed (version 3.4.2)
Ensure OpenSSL is installed (version 1.1.1)
Being an Arch Linux system, I of course have gcc installed for a C compiler (version 10.2.0)
Isolated the issue down to this package (I was initially trying to install cryptography as a dependency for msal)
Tried using pipenv as well as navigating directly to the python executable in the ~/.pyenv/versions/3.9.8 directory
In the ~/.pyenv/versions/3.9.8 directory, tried both using the pip executable there, as well as ./python -m pip for installation, with the same results both times.
The above steps also included checking all 4 of the suggested debugging steps from the error message.
It might also be useful to note that all of this works perfectly in the virtual environment on my main system (also Arch Linux, but x86_64 rather than ARM).
What else can I try to get the cryptography package installed?
Alternatively, it looks like the same version of the library is installed in the main site packages through pacman, but that of course is not recognized by the virtual environment or by a separate version of python. Is there some way I can force python 3.9.8 to use that package instead?

#jakub's solution ended up solving the problem for me. I uninstalled the version of rust that was installed through pacman. To replace it, I installed rustup and then using rustup, installed the latest nightly version of rust (1.60). Once I did that, installing the cryptography package worked just fine.
If you are using rustup, just make sure that you add ~/.cargo/bin to your PATH before installation. Also, the command I used to install rust through rustup was rustup toolchain install nightly.

Cannot Install cryptography and pynacl libraries in pyCharm running on Windows

I am running pyCharm on Windows 10 Pro. When I try to install autobahn libraries using pip, I get the following error:
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\VC\\Tools\\MSVC\\14.24.28314\\bin\\HostX86\\x64\\cl.exe' failed with exit status 2.
The complete log for the command prompt is as follows:
Using cached https://files.pythonhosted.org/packages/35/77/1bf9b3c4c0850fd6f00996afcf5e71e35295c145833f4e2430d0a7fddbaa/autobahn-19.11.1-py2.py3-none-any.whl
Collecting six>=1.11.0 (from autobahn)
Using cached https://files.pythonhosted.org/packages/65/26/32b8464df2a97e6dd1b656ed26b2c194606c16fe163c695a992b36c11cdf/six-1.13.0-py2.py3-none-any.whl
Collecting cryptography>=2.7 (from autobahn)
Using cached https://files.pythonhosted.org/packages/be/60/da377e1bed002716fb2d5d1d1cab720f298cb33ecff7bf7adea72788e4e4/cryptography-2.8.tar.gz
Installing build dependencies: started
Installing build dependencies: finished with status 'done'
Getting requirements to build wheel: started
Getting requirements to build wheel: finished with status 'done'
Preparing wheel metadata: started
Preparing wheel metadata: finished with status 'done'
Collecting txaio>=18.8.1 (from autobahn)
Using cached https://files.pythonhosted.org/packages/e9/6d/e1a6f7835cde86728e5bb1f577be9b2d7d273fdb33c286e70b087d418ded/txaio-18.8.1-py2.py3-none-any.whl
Collecting cffi!=1.11.3,>=1.8 (from cryptography>=2.7->autobahn)
Using cached https://files.pythonhosted.org/packages/2d/bf/960e5a422db3ac1a5e612cb35ca436c3fc985ed4b7ed13a1b4879006f450/cffi-1.13.2.tar.gz
Collecting pycparser (from cffi!=1.11.3,>=1.8->cryptography>=2.7->autobahn)
Using cached https://files.pythonhosted.org/packages/68/9e/49196946aee219aead1290e00d1e7fdeab8567783e83e1b9ab5585e6206a/pycparser-2.19.tar.gz
Building wheels for collected packages: cryptography
Building wheel for cryptography (PEP 517): started
Building wheel for cryptography (PEP 517): finished with status 'error'
Complete output from command C:\Users\divya\PycharmProjects\auto1\venv-new_without_global\Scripts\python.exe C:\Users\divya\PycharmProjects\auto1\venv-new_without_global\lib\site-packages\pip-19.0.3-py3.8.egg\pip\_vendor\pep517\_in_process.py build_wheel C:\Users\divya\AppData\Local\Temp\tmp6wfys117:
running bdist_wheel
running build
running build_py
creating build
creating build\lib.win-amd64-3.8
creating build\lib.win-amd64-3.8\cryptography
copying src\cryptography\exceptions.py -> build\lib.win-amd64-3.8\cryptography
copying src\cryptography\fernet.py -> build\lib.win-amd64-3.8\cryptography
copying src\cryptography\utils.py -> build\lib.win-amd64-3.8\cryptography
copying src\cryptography\__about__.py -> build\lib.win-amd64-3.8\cryptography
copying src\cryptography\__init__.py -> build\lib.win-amd64-3.8\cryptography
creating build\lib.win-amd64-3.8\cryptography\hazmat
copying src\cryptography\hazmat\_der.py -> build\lib.win-amd64-3.8\cryptography\hazmat
copying src\cryptography\hazmat\_oid.py -> build\lib.win-amd64-3.8\cryptography\hazmat
copying src\cryptography\hazmat\__init__.py -> build\lib.win-amd64-3.8\cryptography\hazmat
creating build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\base.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\certificate_transparency.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\extensions.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\general_name.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\name.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\ocsp.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\oid.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\__init__.py -> build\lib.win-amd64-3.8\cryptography\x509
creating build\lib.win-amd64-3.8\cryptography\hazmat\backends
copying src\cryptography\hazmat\backends\interfaces.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends
copying src\cryptography\hazmat\backends\__init__.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends
creating build\lib.win-amd64-3.8\cryptography\hazmat\bindings
copying src\cryptography\hazmat\bindings\__init__.py -> build\lib.win-amd64-3.8\cryptography\hazmat\bindings
creating build\lib.win-amd64-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\cmac.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\constant_time.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\hashes.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\hmac.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\keywrap.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\padding.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\poly1305.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\__init__.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives
creating build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\aead.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\backend.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ciphers.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\cmac.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\decode_asn1.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\dh.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\dsa.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ec.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ed25519.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ed448.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\encode_asn1.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\hashes.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\hmac.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ocsp.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\poly1305.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\rsa.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\utils.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\x25519.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\x448.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\x509.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\__init__.py -> build\lib.win-amd64-3.8\cryptography\hazmat\backends\openssl
creating build\lib.win-amd64-3.8\cryptography\hazmat\bindings\openssl
copying src\cryptography\hazmat\bindings\openssl\binding.py -> build\lib.win-amd64-3.8\cryptography\hazmat\bindings\openssl
copying src\cryptography\hazmat\bindings\openssl\_conditional.py -> build\lib.win-amd64-3.8\cryptography\hazmat\bindings\openssl
copying src\cryptography\hazmat\bindings\openssl\__init__.py -> build\lib.win-amd64-3.8\cryptography\hazmat\bindings\openssl
creating build\lib.win-amd64-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\dh.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\dsa.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\ec.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\ed25519.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\ed448.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\padding.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\rsa.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\utils.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\x25519.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\x448.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\__init__.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\asymmetric
creating build\lib.win-amd64-3.8\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\aead.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\algorithms.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\base.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\modes.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\__init__.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\ciphers
creating build\lib.win-amd64-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\concatkdf.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\hkdf.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\kbkdf.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\pbkdf2.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\scrypt.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\x963kdf.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\__init__.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\kdf
creating build\lib.win-amd64-3.8\cryptography\hazmat\primitives\serialization
copying src\cryptography\hazmat\primitives\serialization\base.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\serialization
copying src\cryptography\hazmat\primitives\serialization\pkcs12.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\serialization
copying src\cryptography\hazmat\primitives\serialization\ssh.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\serialization
copying src\cryptography\hazmat\primitives\serialization\__init__.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\serialization
creating build\lib.win-amd64-3.8\cryptography\hazmat\primitives\twofactor
copying src\cryptography\hazmat\primitives\twofactor\hotp.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\twofactor
copying src\cryptography\hazmat\primitives\twofactor\totp.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\twofactor
copying src\cryptography\hazmat\primitives\twofactor\utils.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\twofactor
copying src\cryptography\hazmat\primitives\twofactor\__init__.py -> build\lib.win-amd64-3.8\cryptography\hazmat\primitives\twofactor
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'
warning: build_py: byte-compiling is disabled, skipping.
running build_ext
generating cffi module 'build\\temp.win-amd64-3.8\\Release\\_padding.c'
creating build\temp.win-amd64-3.8
creating build\temp.win-amd64-3.8\Release
generating cffi module 'build\\temp.win-amd64-3.8\\Release\\_constant_time.c'
generating cffi module 'build\\temp.win-amd64-3.8\\Release\\_openssl.c'
building '_openssl' extension
creating build\temp.win-amd64-3.8\Release\build
creating build\temp.win-amd64-3.8\Release\build\temp.win-amd64-3.8
creating build\temp.win-amd64-3.8\Release\build\temp.win-amd64-3.8\Release
C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.24.28314\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -IC:\Users\divya\PycharmProjects\auto1\venv-new_without_global\include -IC:\Users\divya\AppData\Local\Programs\Python\Python38\include -IC:\Users\divya\AppData\Local\Programs\Python\Python38\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.24.28314\include" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\cppwinrt" /Tcbuild\temp.win-amd64-3.8\Release\_openssl.c /Fobuild\temp.win-amd64-3.8\Release\build\temp.win-amd64-3.8\Release\_openssl.obj
_openssl.c
build\temp.win-amd64-3.8\Release\_openssl.c(498): fatal error C1083: Cannot open include file: 'openssl/opensslv.h': No such file or directory
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\VC\\Tools\\MSVC\\14.24.28314\\bin\\HostX86\\x64\\cl.exe' failed with exit status 2
----------------------------------------
Running setup.py clean for cryptography
Failed to build cryptography
Failed building wheel for cryptography
Could not build wheels for cryptography which use PEP 517 and cannot be installed directly
However, when I try to install autobahn and cryptography using windows elevated command prompt(run as administrator), it installs correctly. Can anyone iterate how to install autobahn and cryptography without admin privileges and without including global-site packages in pyCharm?
P.S I have already installed MS Visual Studio build tools 2019 and openssl_X64.

UnicodeDecodeError when installing python-igraph

I'm using python 2.7 on 64-bit Linux Mint 16 and I'm trying to install python-igraph. But when I run sudo pip install python-igraph I get the following log:
Downloading/unpacking python-igraph
Downloading python-igraph-0.7.1-1.tar.gz (375kB): 375kB downloaded
Running setup.py egg_info for package python-igraph
Installing collected packages: python-igraph
Running setup.py install for python-igraph
Build type: dynamic extension
Include path: /usr/include/igraph
Library path:
Linked dynamic libraries: igraph
Linked static libraries:
Extra compiler options:
Extra linker options:
building 'igraph._igraph' extension
x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/igraph -I../../build/include -I../../include -I/usr/local/include/igraph -I/usr/include/igraph -I/usr/include/python2.7 -c src/igraphmodule.c -o build/temp.linux-x86_64-2.7/src/igraphmodule.o
In file included from src/igraphmodule.c:30:0:
src/convert.h:65:59: error: unknown type name ‘igraph_pagerank_algo_t’
int igraphmodule_PyObject_to_pagerank_algo_t(PyObject *o, igraph_pagerank_algo_t *result);
^
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
Complete output from command /usr/bin/python -c "import setuptools;__file__='/tmp/pip_build_root/python-igraph/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-akm3_O-record/install-record.txt --single-version-externally-managed:
running install
running build
running build_py
creating build
creating build/lib.linux-x86_64-2.7
creating build/lib.linux-x86_64-2.7/igraph
copying igraph/formula.py -> build/lib.linux-x86_64-2.7/igraph
copying igraph/__init__.py -> build/lib.linux-x86_64-2.7/igraph
copying igraph/configuration.py -> build/lib.linux-x86_64-2.7/igraph
copying igraph/summary.py -> build/lib.linux-x86_64-2.7/igraph
copying igraph/layout.py -> build/lib.linux-x86_64-2.7/igraph
copying igraph/cut.py -> build/lib.linux-x86_64-2.7/igraph
copying igraph/datatypes.py -> build/lib.linux-x86_64-2.7/igraph
copying igraph/utils.py -> build/lib.linux-x86_64-2.7/igraph
copying igraph/clustering.py -> build/lib.linux-x86_64-2.7/igraph
copying igraph/statistics.py -> build/lib.linux-x86_64-2.7/igraph
copying igraph/matching.py -> build/lib.linux-x86_64-2.7/igraph
copying igraph/compat.py -> build/lib.linux-x86_64-2.7/igraph
creating build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/operators.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/isomorphism.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/__init__.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/colortests.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/conversion.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/homepage.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/attributes.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/vertexseq.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/structural.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/separators.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/atlas.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/layouts.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/rng.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/games.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/utils.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/iterators.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/edgeseq.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/indexing.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/spectral.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/cliques.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/flow.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/basic.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/generators.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/matching.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/foreign.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/bipartite.py -> build/lib.linux-x86_64-2.7/igraph/test
copying igraph/test/decomposition.py -> build/lib.linux-x86_64-2.7/igraph/test
creating build/lib.linux-x86_64-2.7/igraph/app
copying igraph/app/__init__.py -> build/lib.linux-x86_64-2.7/igraph/app
copying igraph/app/shell.py -> build/lib.linux-x86_64-2.7/igraph/app
creating build/lib.linux-x86_64-2.7/igraph/drawing
copying igraph/drawing/__init__.py -> build/lib.linux-x86_64-2.7/igraph/drawing
copying igraph/drawing/edge.py -> build/lib.linux-x86_64-2.7/igraph/drawing
copying igraph/drawing/shapes.py -> build/lib.linux-x86_64-2.7/igraph/drawing
copying igraph/drawing/coord.py -> build/lib.linux-x86_64-2.7/igraph/drawing
copying igraph/drawing/metamagic.py -> build/lib.linux-x86_64-2.7/igraph/drawing
copying igraph/drawing/utils.py -> build/lib.linux-x86_64-2.7/igraph/drawing
copying igraph/drawing/text.py -> build/lib.linux-x86_64-2.7/igraph/drawing
copying igraph/drawing/graph.py -> build/lib.linux-x86_64-2.7/igraph/drawing
copying igraph/drawing/colors.py -> build/lib.linux-x86_64-2.7/igraph/drawing
copying igraph/drawing/vertex.py -> build/lib.linux-x86_64-2.7/igraph/drawing
copying igraph/drawing/baseclasses.py -> build/lib.linux-x86_64-2.7/igraph/drawing
creating build/lib.linux-x86_64-2.7/igraph/remote
copying igraph/remote/__init__.py -> build/lib.linux-x86_64-2.7/igraph/remote
copying igraph/remote/nexus.py -> build/lib.linux-x86_64-2.7/igraph/remote
copying igraph/remote/gephi.py -> build/lib.linux-x86_64-2.7/igraph/remote
creating build/lib.linux-x86_64-2.7/igraph/vendor
copying igraph/vendor/__init__.py -> build/lib.linux-x86_64-2.7/igraph/vendor
copying igraph/vendor/texttable.py -> build/lib.linux-x86_64-2.7/igraph/vendor
running build_ext
Build type: dynamic extension
Include path: /usr/include/igraph
Library path:
Linked dynamic libraries: igraph
Linked static libraries:
Extra compiler options:
Extra linker options:
building 'igraph._igraph' extension
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/src
x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/igraph -I../../build/include -I../../include -I/usr/local/include/igraph -I/usr/include/igraph -I/usr/include/python2.7 -c src/igraphmodule.c -o build/temp.linux-x86_64-2.7/src/igraphmodule.o
In file included from src/igraphmodule.c:30:0:
src/convert.h:65:59: error: unknown type name ‘igraph_pagerank_algo_t’
int igraphmodule_PyObject_to_pagerank_algo_t(PyObject *o, igraph_pagerank_algo_t *result);
^
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
----------------------------------------
Cleaning up...
Command /usr/bin/python -c "import setuptools;__file__='/tmp/pip_build_root/python-igraph/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-akm3_O-record/install-record.txt --single-version-externally-managed failed with error code 1 in /tmp/pip_build_root/python-igraph
Traceback (most recent call last):
File "/usr/bin/pip", line 9, in <module>
load_entry_point('pip==1.4.1', 'console_scripts', 'pip')()
File "/usr/lib/python2.7/dist-packages/pip/__init__.py", line 148, in main
return command.main(args[1:], options)
File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 169, in main
text = '\n'.join(complete_log)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 50: ordinal not in range(128)
I previously installed libigraph0-dev. How can I install python-igraph in this case?

Does the version of libigraph0-dev match the version number of the Python interface? If the version of libigraph0-dev is not equal to 0.7.1, it will not be suitable for the version of python-igraph that you are trying to compile. In that case, it is better to remove libigraph0 and libigraph0-dev and run pip install python-igraph again; the setup script will then attempt to download and compile an appropriate version of the C core of igraph first.
I know that you have posted another question today in which you stated that pip install python-igraph (without having libigraph0-dev) does not work for you; try again anyway because the previous version of python-igraph had a bug that prevented it from downloading the right version of the C core, and I have fixed the bug just an hour ago.

download source code of igraph in C and install it using below code
./configure && make && sudo make install
then install python igraph using pip or from source

lxml installation error ubuntu 14.04 (internal compiler error)

I am having problems with installing lxml. I have tried the solutions of the relative questions in this site and other sites but could not fix the problem. Need some suggestions/solution on this.
I am providing the full log after executing pip install lxml,
Downloading/unpacking lxml
Downloading lxml-3.3.5.tar.gz (3.5MB): 3.5MB downloaded
Running setup.py (path:/tmp/pip_build_root/lxml/setup.py) egg_info for package lxml
/usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
Building lxml version 3.3.5.
Building without Cython.
Using build configuration of libxslt 1.1.28
warning: no previously-included files found matching '*.py'
Installing collected packages: lxml
Running setup.py install for lxml
/usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
Building lxml version 3.3.5.
Building without Cython.
Using build configuration of libxslt 1.1.28
building 'lxml.etree' extension
x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/libxml2 -I/tmp/pip_build_root/lxml/src/lxml/includes -I/usr/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.linux-x86_64-2.7/src/lxml/lxml.etree.o -w
x86_64-linux-gnu-gcc: internal compiler error: Killed (program cc1)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.8/README.Bugs> for instructions.
error: command 'x86_64-linux-gnu-gcc' failed with exit status 4
Complete output from command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip_build_root/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-KUq9VD-record/install-record.txt --single-version-externally-managed --compile:
/usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
Building lxml version 3.3.5.
Building without Cython.
Using build configuration of libxslt 1.1.28
running install
running build
running build_py
creating build
creating build/lib.linux-x86_64-2.7
creating build/lib.linux-x86_64-2.7/lxml
copying src/lxml/pyclasslookup.py -> build/lib.linux-x86_64-2.7/lxml
copying src/lxml/doctestcompare.py -> build/lib.linux-x86_64-2.7/lxml
copying src/lxml/builder.py -> build/lib.linux-x86_64-2.7/lxml
copying src/lxml/cssselect.py -> build/lib.linux-x86_64-2.7/lxml
copying src/lxml/sax.py -> build/lib.linux-x86_64-2.7/lxml
copying src/lxml/_elementpath.py -> build/lib.linux-x86_64-2.7/lxml
copying src/lxml/ElementInclude.py -> build/lib.linux-x86_64-2.7/lxml
copying src/lxml/__init__.py -> build/lib.linux-x86_64-2.7/lxml
copying src/lxml/usedoctest.py -> build/lib.linux-x86_64-2.7/lxml
creating build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/__init__.py -> build/lib.linux-x86_64-2.7/lxml/includes
creating build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/html5parser.py -> build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/ElementSoup.py -> build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/builder.py -> build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/clean.py -> build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/_diffcommand.py -> build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/diff.py -> build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/_html5builder.py -> build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/_setmixin.py -> build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/defs.py -> build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/formfill.py -> build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/soupparser.py -> build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/__init__.py -> build/lib.linux-x86_64-2.7/lxml/html
copying src/lxml/html/usedoctest.py -> build/lib.linux-x86_64-2.7/lxml/html
creating build/lib.linux-x86_64-2.7/lxml/isoschematron
copying src/lxml/isoschematron/__init__.py -> build/lib.linux-x86_64-2.7/lxml/isoschematron
copying src/lxml/lxml.etree.h -> build/lib.linux-x86_64-2.7/lxml
copying src/lxml/lxml.etree_api.h -> build/lib.linux-x86_64-2.7/lxml
copying src/lxml/includes/config.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/xpath.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/tree.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/dtdvalid.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/xmlparser.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/etreepublic.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/xslt.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/schematron.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/uri.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/c14n.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/xinclude.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/xmlschema.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/xmlerror.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/relaxng.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/htmlparser.pxd -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/etree_defs.h -> build/lib.linux-x86_64-2.7/lxml/includes
copying src/lxml/includes/lxml-version.h -> build/lib.linux-x86_64-2.7/lxml/includes
creating build/lib.linux-x86_64-2.7/lxml/isoschematron/resources
creating build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/rng
copying src/lxml/isoschematron/resources/rng/iso-schematron.rng -> build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/rng
creating build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl
copying src/lxml/isoschematron/resources/xsl/RNG2Schtrn.xsl -> build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl
copying src/lxml/isoschematron/resources/xsl/XSD2Schtrn.xsl -> build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl
creating build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_schematron_skeleton_for_xslt1.xsl -> build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_dsdl_include.xsl -> build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_schematron_message.xsl -> build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_svrl_for_xslt1.xsl -> build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_abstract_expand.xsl -> build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/readme.txt -> build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
running build_ext
building 'lxml.etree' extension
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/src
creating build/temp.linux-x86_64-2.7/src/lxml
x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/libxml2 -I/tmp/pip_build_root/lxml/src/lxml/includes -I/usr/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.linux-x86_64-2.7/src/lxml/lxml.etree.o -w
x86_64-linux-gnu-gcc: internal compiler error: Killed (program cc1)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.8/README.Bugs> for instructions.
error: command 'x86_64-linux-gnu-gcc' failed with exit status 4
----------------------------------------
Cleaning up...
Command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip_build_root/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-KUq9VD-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /tmp/pip_build_root/lxml
Storing debug log for failure in /root/.pip/pip.log
Also, the pip.log file looks like this,
status = self.run(options, args)
File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 283, in run
requirement_set.install(install_options, global_options, root=options.root_path)
File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1435, in install
requirement.install(install_options, global_options, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/pip/req.py", line 706, in install
cwd=self.source_dir, filter_stdout=self._filter_install, show_stdout=False)
File "/usr/lib/python2.7/dist-packages/pip/util.py", line 697, in call_subprocess
% (command_desc, proc.returncode, cwd))
InstallationError: Command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip_build_root/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-KUq9VD-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /tmp/pip_build_root/lxml
dmesg | tail command shows output like this,
[1744367.676147] Out of memory: Kill process 25518 (cc1) score 388 or sacrifice child
[1744367.676665] Killed process 25518 (cc1) total-vm:242352kB, anon-rss:200608kB, file-rss:0kB
It's seems like a memory issue. I am taking reference form this question

Possible solution (if you have no ability to increase memory on that machine) is to add swap file.
sudo dd if=/dev/zero of=/swapfile bs=1024 count=524288
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
from https://github.com/pydata/pandas/issues/1880#issuecomment-9920484
This worked for me on smallest digital ocean machine

In this particular case, it has nothing to do with dependencies, it's a memory problem.
I had this problem within a virtualbox VM. My solution was to increase memory allocated to the VM from the default 512Mb to 1024Mb.

Refer to https://stackoverflow.com/a/6504860/261718
Go install some dev packages before pip install lxml
apt-get install libxml2-dev libxslt1-dev python-dev

Using digitalocean smallest machine you can just turn off mysql and apache while compiling using
sudo service apache2 stop
sudo service mysql stop
and after installing lxml turn them on again using this commands with 'start' instead of 'stop'. Works pretty well for me without using swap file

If #Drake answer does not work for you try adding lib1g-dev.
$ sudo apt-get install -y libxml2-dev libxslt1-dev zlib1g-dev