[opensource-dev] specifying wich python binary to use?

Lance Corrimal Lance.Corrimal at eregion.de
Sun Sep 23 01:56:52 PDT 2018

Am Samstag, 22. September 2018, 16:53:27 CEST schrieb Lance Corrimal:
> Am Samstag, 22. September 2018, 16:00:31 CEST schrieb Henri Beauchamp:
> > On Sat, 22 Sep 2018 15:43:14 +0200, Lance Corrimal wrote:
> > > I have python 2 and python 3 installed on my system, is there a way to
> > > specify which python version autobuild should use? by default it tries
> > > python3, which fails.
> > 
> > Depending on your distribution, you may specify (or not) which Python
> > version is to be used when invoking 'python', with: alternatives --config
> > python
> looked into that already, didn't work.
> The weird thing is, /usr/bin/python already points at /usr/bin/python2, but
> autobuild still picks up python 3...
> > If it does not work, you may trick the build system by creating a "python"
> > link to the python2 binary and then changing the PATH so that your link is
> > found first. E.g. from a terminal:
> gonna try that. Why didn't I think of that myself (no I do not want the
> obvious answer :P)

the trick with the link did not work either, cmake is evil enough to actually 
search for python binaries WITH the attached version number.

BUT there is a variable that you can pass to autobuild, to pass it on to 
cmake, that contains a list of the version numbers to search for...

-DPython_ADDITIONAL_VERSIONS:STRING="2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0"

with this autobuild does not find python3 binaries, and all is well.


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