Philippe Mathieu-Daudé <f4...@amsat.org> writes: > Hi Markus, > > > Le jeu. 8 nov. 2018 09:46, Markus Armbruster <arm...@redhat.com> a écrit : > >> Cleber Rosa <cr...@redhat.com> writes: >> >> > On 11/7/18 1:05 AM, Markus Armbruster wrote: [...] >> >> PEP 394 recommends software distributions install Python 3 into the >> >> default path as python3, and users use that instead of python, except >> >> for programs that are source compatible with both 2 and 3. So, is >> >> finding out whether python is a Python 3 really appropriate? Why can't >> >> we just use python3 and be done with it? >> >> >> > >> > I mentioned that before, when you pointed out the issue you fix here, >> > that configure may be the best place to get the Python version (not only >> > the major version) and make it available elsewhere. Even if not used >> > for other purposes, it is IMO important information to show on the >> > resulting "configure" output. >> > >> > I'm sending patches to do that in a few. >> > >> >> If we can't: isn't this a configure problem? >> >> >> > >> > I believe adhering to PEP394 is a good thing, but even that document >> > recognizes that the real world is not a perfect place: "however, end >> > users should be aware that python refers to python3 on at least Arch >> > Linux". And it only covers *nix systems, so if we hope to care for >> > non-*nix systems, we have to check the Python version manually. >> > >> > So, I guess the safest approach from QEMU's side is to check for the >> > version indeed. >> >> If somebody can point to a system people still use where python3 doesn't >> get you a Python 3, but python does, catering for such (crappy) systems >> in configure makes sense. Until then, it's a waste of brain waves and >> configure run time. >> >> PEP 394 mentions Arch Linux. It's been seven years. What's the most >> recent version of Arch Linux that's still crappy in this regard? >> > > Arch doesn't provide python2 by default, thus python points to python3.
That's non-crappy as long as python3 also exists, as PEP 394 recommends. Does it? > I think what's crappy is scripts expecting python to be python2. No argument.