Re: [gentoo-user] Python 3.5

[Alan McKinnon]

On 29/10/2017 11:11, Peter Humphrey wrote:
> On Sun, 29 Oct 2017 19:31:46 +1100
> Adam Carter <adamcarter3@×××××.com> wrote:
>
>>> On my amd64 arch machine I;
>>> emerged python 3.5
>>> eselected python 3.5
>>> edited make.conf to set PYTHON_TARGETS to "python2_7 python3_5"
>>> running emerge -pv --depclean =python-3.4.5 to see what needs to be
>>> rebuilt Then tryed to rebuild those packages to allow removal of 3.4,
>>> however, it looks like that I would then have to change
>>> PYTHON_SINGLE_TARGET to 3.5 too, and some other packages still require
>>> it to be set to 2.7, so i've bailed out of trying to get rid of 3.4 on
>>> that box. I'll leave PYTHON_TARGETS at "python2_7 python3_5" unless I
>>> find something that also needs 3.4 in there.
>>>
>>> Failure came fast, example;
>> The following REQUIRED_USE flag constraints are unsatisfied:
>>     python? ( at-most-one-of ( python_targets_python3_4
>> python_targets_python3_5 python_targets_python3_6 )
>>
>> So ive unset PYTHON_TARGETS and PYTHON_SINGLE_TARGET again.
>
> Do you actually need any python entries in make.conf? I'm running happily
> here without any. I just let the profile and ebuilds sort out what they
> need.
>


For the most part, and for the regular user, that is generally fine. The
devs and profile maintainers take care of all the fiddly bits and ensure
that the settings are correct across the tree when they update the
profile to use the next Pythn version

For some users (aka the typical Gentoo'er) that doesn't really cut it.
Maybe the user wants to fiddle with python-3.5 before the profile is
ready for it.

Maybe the user wants to use some nifty new package or take advantage of
new features in python-3.5. This is the thing R0b0t1 was referring to.
In that case, the user must do for himself what the profile maintainers
do for you. That user also gets to keep all the shiny broken bits whilst
figuring out what to set for what

-- 
Alan McKinnon
alan.mckinnon@×××××.com