Build from source installation error

[aamorel]

I have a problem when building from source when using the _build_and_install_defaultconfig.sh.

My system

Distributor ID: Ubuntu Description: Ubuntu 20.04.4 LTS Release: 20.04 Codename: focal

gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0

Script output

build_and_install_warnings-2022-06-29-11-21-35.log

Please tell me if you need any further information, Thank you for your help

[arntanguy]

The issue is here:

cd /data/aamorel/Eigen3ToPython/build && /usr/bin/cmake -E chdir /data/aamorel/Eigen3ToPython/build/python/RelWithDebInfo python -m pip install . --upgrade
/usr/bin/python: No module named pip

It seems that for some reason you do not have python's pip installed (python3 -m pip -V). This is surprising as the script normally tries to install it. Could you try:

sudo apt install python3-pip

Then make sure pip was properly installed and relaunch the ./build_and_install.sh script.

[aamorel]

I think the problem is that I have both Python 2.7 and Python 3.8 installed.

python -m pip /usr/bin/python: No module named pip

python3 -m pip -V pip 20.0.2 from /usr/lib/python3/dist-packages/pip (python 3.8)

What would be the right way to tell the install to use python3 instead of python ? Can I specify Python's path ? It way be the option _PYTHON_FORCEPYTHON3 but I wan't to be sure.

Thank you for your fast response

[arntanguy]

Yes, if you set

PYTHON_FORCE_PYTHON2="false"
PYTHON_FORCE_PYTHON3="true"
PYTHON_BUILD_PYTHON2_AND_PYTHON3="false"

This will force the script to use python3 only.

[aamorel]

Thank you, installation was a success !