Intro
If you are lucky enough to have Python 3.7 in your OS repositories then you can skip this post if not you might find a hard time setting up Python 3.7 with SSL support. Python 3.7 requires a recent version of openssl but even when that one has been installed in my case it would not find it so I'm documenting the steps on how I got it to work.
1) Get a recent openssl installation
In my case I went for 1.1.1a as that one should be working with Python 3.7.
cd /usr/src/
sudo wget https://github.com/openssl/openssl/archive/OpenSSL_1_1_1a.tar.gz
sudo tar -xvzf OpenSSL_1_1_1a.tar.gz
cd openssl-OpenSSL_1_1_1a/
export CFLAGS=-fPIC # Make sure we build shared libraries
./config shared --prefix /usr/local/openssl111a --openssldir=/usr/local/ssl # Make sure we build shared libraries
sudo make
sudo make install
2) Get and install Python
It is possible to follow instuctions of https://tecadmin.net/install-python-3-7-on-ubuntu-linuxmint/ with the following changes:
- Before doing any configure make symbolic links to the openssl libraries. I tried adding the openssl lib folder to LD_LIBRARY_PATH but for some reason I would still always error out with
*** WARNING: renaming "_ssl" since importing it failed: libssl.so.1.1: cannot open shared object file: No such file or directory'
Creating symbolic links in a default library path did strangely enough work:
cd /usr/lib
sudo ln -s /opt/openssl/lib/libcrypto.so.1.1
sudo ln -s /opt/openssl/lib/libssl.so.1.1
- When doing the configure specify additional details
sudo LDFLAGS="-L/opt/openssl/lib" ./configure --enable-optimizations --with-openssl=/opt/openssl > /tmp/configure_output
When doing the make if you redirect stdout you will only see the warnings if they don't show:
*** WARNING: renaming "_ssl" since importing it failed: libssl.so.1.1: cannot open shared object file: No such file or directory
*** WARNING: renaming "_hashlib" since importing it failed: libssl.so.1.1: cannot open shared object file: No such file or directory
then you are good to go.
You can validate by importing the python ssl lib:
$ /usr/local/bin/python3.7
Python 3.7.0 (default, Dec 23 2018, 10:35:52)
[GCC 6.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import ssl
>>>
No error means you should be good to go.
