Re: [gentoo-user] problem emerging new stable python

[Alan McKinnon]

On 29/11/2017 21:48, allan gottlieb wrote:
> I have two systems that are close in both hardware and software.
>
> Today I did eix-sync on each followed by
> emerge --update --changed-use --with-bdeps=y @world
>
> On one system (dell 6430) I was presented with many packages to merge
>    python-3.5.4 [ebuild NS]
>    many to reinstall [ebuild R]
>
> This was not surprising.
>
> The other system (dell 7450) failed with the following
>
> !!! Problem resolving dependencies for sys-process/systemd-cron from @selected
> ... done!
>
> !!! The ebuild selected to satisfy "sys-process/systemd-cron" has unmet requirements.
> - sys-process/systemd-cron-1.5.4::gentoo USE="-cron-boot -etc-crontab-systemd -minutely -setgid -test -yearly" ABI_X86="(64)" PYTHON_SINGLE_TARGET="python3_4 python3_5 (-pypy3) (-python3_6)" PYTHON_TARGETS="python3_5 (-pypy3) -python3_4 (-python3_6)"
>
>   The following REQUIRED_USE flag constraints are unsatisfied:
>     exactly-one-of ( python_single_target_pypy3 python_single_target_python3_4 python_single_target_python3_5 python_single_target_python3_6 ) python_single_target_python3_4? ( python_targets_python3_4 )
>
>   The above constraints are a subset of the following complete expression:
>     exactly-one-of ( python_single_target_pypy3 python_single_target_python3_4 python_single_target_python3_5 python_single_target_python3_6 ) python_single_target_pypy3? ( python_targets_pypy3 ) python_single_target_python3_4? ( python_targets_python3_4 ) python_single_target_python3_5? ( python_targets_python3_5 ) python_single_target_python3_6? ( python_targets_python3_6 )
>
> (dependency required by "@selected" [set])
> (dependency required by "@world" [argument])
>
> Both 6430 and 7450 have the following content in
> /etc/portage/package.use/systemd-cron
>
> # systemd-cron needs PYTHON_SINGLE_TARGET = 3.x.
> sys-process/systemd-cron python_single_target_python3_4
>
> Those files are 2+ years old on each system
>
> I have not let the 6430 proceed with the emerge update world.
>
> Thanks in advance for any help.
> allan
>

Your machines differ between PYTHON_TARGETS and PYTHON_SINGLE_TARGET,
either globally or for that one package. Compare:

emerge --info | grep PYTHON
list of installed pythons
eselect python list

The cause is likely in make.conf somewhere

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