CODEWITHSUNDEEP
pythonpython-3.xubuntuopensslpyenv
Hofbr
Hofbr

Reputation: 1010

Pyenv unable to install older versions of Python 3 due to `configure: error: C compiler cannot create executables`

I've been trying to use pyenv to install older versions of python3. I've tried 3.0.1, 3.1.0, 3.1.1, and 3.1.2. I kept getting the error

ImportError: No module named _ssl
ERROR: The Python ssl extension was not compiled. Missing the OpenSSL lib?

Following some documentation from pyenv I tried updating my command to explicitly pass the location of the headers and libraries like so:

➜ CPPFLAGS="-I/usr/bin/openssl/include" \
LDFLAGS="-L/usr/bin/openssl/lib" \
pyenv install -v 3.1.2

That seems to have gotten past that error but now I'm getting the error configure: error: C compiler cannot create executables

The only suggestion I can find for Ubuntu is to install/update the build-essential package which I've done and was already installed and fully updated.

I can see that the gcc command is working. So what else am I missing?

Full Error

➜ CPPFLAGS="-I/usr/bin/openssl/include" \  
LDFLAGS="-L/usr/bin/openssl/lib" \
pyenv install -v 3.1.2
/tmp/python-build.20230107155624.97473 ~/GitProjects/VWAP_backtest
Downloading Python-3.1.2.tar.gz...
-> https://www.python.org/ftp/python/3.1.2/Python-3.1.2.tgz
/tmp/python-build.20230107155624.97473/Python-3.1.2 /tmp/python-build.20230107155624.97473 ~/GitProjects/VWAP_backtest
Installing Python-3.1.2...
patching file ./setup.py
patching file ./Lib/ssl.py
patching file ./Modules/_ssl.c
checking for --enable-universalsdk... no
checking for --with-universal-archs... 32-bit
checking MACHDEP... linux5
checking machine type as reported by uname -m... x86_64
checking for --without-gcc... no
checking for gcc... gcc
checking for C compiler default output file name... 
configure: error: C compiler cannot create executables
See `config.log' for more details.

BUILD FAILED (Ubuntu 22.04 using python-build 2.3.9-18-g25c974d5)

Upvotes: 1

Views: 896

Answers (1)

firescar96
firescar96

Reputation: 449

Looks like the libssl-dev package is missing. Try installing that library along with some others you might have missed by using the pyenv build instructions.

In particular you should install the pyenv dependencies. For example for the Debian OS you would want:

sudo apt update; sudo apt install build-essential libssl-dev zlib1g-dev \
libbz2-dev libreadline-dev libsqlite3-dev curl llvm \
libncursesw5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev

Upvotes: 2

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