Switch build system to python3 only
Python 2 reached its EOL on Jan 1, 2020
macOS 10.15 deprecated
python2, urging users to switch to
python3 (3.7.3 at the moment). It is very likely that macOS 10.16 will not include python 2 anymore. Homebrew does not offer a python 2 formula anymore.
Ubuntu 18.04 comes with python 3.6 only in the default install. 2.7 is still available in the official repo, but it's an additional package that we're requiring users to install.
CentOS 8 similarly does not provide python 2 by default, and goes a step further by not providing a
/usr/bin/python symlink even if python 2 is installed by the user. Other RHEL-derived distros are presumably following the same approach.
Fedora uses python 3 as default since version 23, and has recently switched
/usr/bin/python to point to python 3 with the Fedora 31 release.
Debian is working on removing python 2 support.
On Arch Linux, python 3 has been the default for several years.
Gentoo has a configurable
/usr/bin/python symlink, pointing to python 3 by default.
It's time to switch our build system (
waf) to require python 3. Initially the minimum required version should be 3.5 in order to support Ubuntu 16.04; after #5087, the requirement can be raised to >=3.6.
Updated by Eric Newberry over 1 year ago
Davide Pesavento wrote:
Eric Newberry wrote:
What is the version of Python 3 provided by CentOS 8? Is it >= 3.5?
It has 3.6.x if I remember correctly, but in any case it's not older than what ubuntu 16.04 provides, otherwise I wouldn't have suggested 3.5 as minimum version.
Ok cool, just wanted to make sure since it wasn't mentioned above. :-)