Building Python 3.7.1 - SSL module failed

Question

Building Python 3.7 from source runs into following error:

Failed to build these modules:
_hashlib              _ssl                                     

Could not build the ssl module!
Python requires an OpenSSL 1.0.2 or 1.1 compatible libssl with X509_VERIFY_PARAM_set1_host().
LibreSSL 2.6.4 and earlier do not provide the necessary APIs, https://github.com/libressl-portable/portable/issues/381

I tried so many workarounds from other stackoverflow-questions, but it doesnt work. I build newest OpenSSL and LibreSSL from source. OpenSSL path is: "/usr/local/ssl" with version OpenSSL 1.0.2p.

./configure --with-openssl=/usr/local/ssl/
(./configure CPPFLAGS="-I/usr/local/ssl/include" LDFLAGS="-L/usr/local/ssl/lib")
make 
make altinstall

My system: Ubuntu 12.04.5 LTS

Any ideas?

Solution 1

I solved it after 3 days only because of this blog. with python 3.7.4 openssl 1.1.0 centOS 6.

here is the summary :

First, some prerequisites:

sudo apt-get install build-essential checkinstall libreadline-gplv2-dev libncursesw5-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev

use yum instead of apt-get if using centos linux.

Install ssl 1.0.2 or higher.

    cd /usr/src
    curl https://www.openssl.org/source/openssl-1.0.2o.tar.gz | tar xz
    cd openssl-1.0.2o
    ./config shared --prefix=/usr/local/
    sudo make
    sudo make install

We will need to pass /usr/src/openssl-1.0.2o into the Python configure script.

mkdir lib
cp ./*.{so,so.1.0.0,a,pc} ./lib

Now proceed with installing Python:

    cd /usr/src
    sudo wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz
    sudo tar xzf Python-3.7.0.tgz
    cd Python-3.7.0
    ./configure --with-openssl=/usr/src/openssl-1.0.2o --enable-optimizations
    sudo make
    sudo make altinstall

To test it out, run python3.7 and input:

import ssl
ssl.OPENSSL_VERSION

Hope it helps!

Solution 2

Compiling openssl

Download your openssl tarball, unzip, and then ensure that the install directory is named openssl.

I placed mine in /usr/local/openssl, so I'll use that in my example.

1. sudo mv openssl-1.0.2u /usr/local/openssl && cd /usr/local/openssl

2. sudo make distclean

3. sudo ./config -fPIC -shared

4. sudo make && sudo install

Now, add the openssl shared library to your PATH.

5. vim ~/.profile Go export LD_LIBRARY_PATH="/usr/local/openssl/lib:$LD_LIBRARY_PATH" :wq

Compiling Python3

The key here is understanding that the path you define with --with-openssl= is where Python looks for /openssl/lib. You need to give Python the parent directory of the openssl directory.

That means that if you set --with-openssl=/usr/local/openssl your make install will fail even though the make logs show that openssl is fine!

--enable-optimizations is irrelevant but recommended - longer make for 10% faster Python code is a good tradeoff.

--prefix= is merely where I'd like python3 to install, if you didn't know.

1. sudo make distclean

Edit your python setup file

2. vim /{yourpythonsource}/Modules/Setup

Uncomment out the following lines and ensure that your SSL variable points to your openssl directory. In mine, it was looking for the directory 'ssl' instead of 'openssl.'

<pre><code># Socket module helper for SSL support; you must comment out the other </code> 

<pre><code># socket line above, and possibly edit the SSL variable: </code>

<code>SSL=/usr/local/openssl
_ssl _ssl.c \
-DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl \
-L$(SSL)/lib -lssl -lcrypto</code>

3. sudo ./configure --with-openssl=/usr/local --prefix=/opt/python-3.7.1

4. sudo make && sudo make install

Solution 3

While this might not be the best answer, I will share how I solved this problem.

1. First of all, in my case, OpenSSL did not build correctly, as make test did return errors (and consequently Python gave this error). This was solved by installing a newer version of Perl and then installing OpenSSL again (configure, make, etc).

2. Use this command before using ./configure

   export LD_LIBRARY_PATH=/path/to/openssl/lib:$LD_LIBRARY_PATH

3. At the configure command, include the library:

   LDFLAGS="-L/path/to/openssl/lib" ./configure (all your preferred options) --with-openssl=/path/to/openssl

   as apparently the option for configure does not convey the message to the C compiler which needs it.

Am not sure whether option 2 and 3 are needed simultaneously, but I did so and it worked.

Solution 4

On CentOS / Linux 2 if you install openssl using

sudo yum install -y openssl-devel

then the library is installed to /usr/local/lib64, and you can configure Python as follows:

./configure --enable-shared --with-openssl=/usr/local/lib64

there are step-by-step instructions here: How to Install Latest (2020) Django to AWS EC2 Linux 2 Instance and Serve w/ Apache Hello World

Solution 5

Edit setup.py

Find the following lines:

        system_lib_dirs = ['/lib64', '/usr/lib64', '/lib', '/usr/lib']
    system_include_dirs = ['/usr/include']

...and place each folder at the beginning of its respective list.

---

In my case I had to add: /usr/local/lib and /usr/local/include:

        system_lib_dirs = ['/usr/local/lib', '/lib64', '/usr/lib64', '/lib', '/usr/lib']
    system_include_dirs = ['/usr/local/include', '/usr/include']

Finally: make distclean && ./configure

You may want to ensure that export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH (or what have you) is added to the very end of /etc/profile and reboot, as well.

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Comments

[mvp]

Your Ubuntu version looks extremely old. Consider upgrading to 18.04 LTS, it will make many issues like this to simply disappear.

[Sunil Kumar]

Possible duplicate of ImportError: No module named _ssl

[w08r]

The brew reinstall was the only thing that worked in my context, thank you!

[Brad Solomon]

You should not need brew link openssl --force. It is dangerous and Brew does not symlink openssl for a good reason: "[email protected] is keg-only, which means it was not symlinked into /usr/local, because openssl/libressl is provided by macOS so don't link an incompatible version."

[blissweb]

Very useful getting the openssl from source. I had to make one change, setting the export LD_LIBRARY_PATH=/usr/src/openssl-1.0.2o/lib before running the configure command. This was Ubuntu 14 with Python 3.8.2. Working, yay !

[dmgl]

Thank you. Without edit vim /{yourpythonsource}/Modules/Setup as you advised i could'nt build python3.8 for raspberry pi 3 "Raspbian GNU/Linux 8 (jessie)"

[Pavel Chernikov]

Why do you need to add ssl shared library to PATH? Did you mean to add it to LD_LIBRARY_PATH?

[Xidh]

Only worked after export LD_LIBRARY as @blissweb mentioned above! Using Debian 8

[Soid]

Work for me after tried a few other answers. I just didn't use the lib folder in openssl (e.g. just LDFLAGS="-L/path/to/openssl")

[Mavaddat Javid]

Nice one. Your advice solved my SSL problem on library/amazonlinux:latest Docker image. yum install -y openssl-devel ./configure --enable-shared --with-openssl=/usr/local/lib64 --enable-optimizations

[Mavaddat Javid]

Yes. I had to combine this make distclean && ./configure advice with that of @adam-winter above. Otherwise, gcc warns about "coverage_mismatch".

[Mavaddat Javid]

For me the build step for openssl was yum install -y tcl tcl-devel tk tk-devel git clone git://git.openssl.org/openssl.git cd openssl/ ./config --prefix=/usr --openssldir=/etc/ssl --libdir=lib shared zlib-dynamic -Wl,-rpath=/usr/local/ssl -Wl,--enable-new-dtags as recommended in wiki.openssl Compilation and Installation ↪ Using RPATHs.

[Tomasz Hławiczka]

Now there is also this one: yum install -y openssl11-devel - Python 3.10 requires OpenSSL 1.1.1 or newer.

[pfa]

Didn't solve it for me. OpenSSL 1.1.1n 15 Mar 2022 (Library: OpenSSL 1.1.1k FIPS 25 Mar 2021) Could not build the ssl module! Python requires a OpenSSL 1.1.1 or newer

[pfa]

Ditto for me on LD_LIBRARY_PATH

[nori]

Very late response, but you're right, I shouldn't have added a ../lib to the $PATH.

[anshuk_pal]

@TomaszHławiczka stackoverflow.com/questions/71951779/… I could not manage to have it built from 3.10 Can you please let me know, where I am going wrong