Re: [gentoo-user] PYTHON_TARGET errors

[Ralf]

On 03/17/2017 03:19 AM, Walter Dnes wrote:
> On Fri, Mar 17, 2017 at 02:09:29AM +0100, Ralf wrote
>
>> So somehow PYTHON_TARGET and PYTHON_SINGLETARGET got screwed on my
>> system. I know how I could fix this for gedit only, but then other
>> packages begin complaining about the same issue as well.
>   No, it's not screwed up.  gedit insists on python 3.x now in
> PYTHON_SINGLE_TARGET, given your USE flags.  Start from the beginning.
> app-editors/gedit-3.22.0::gentoo USE="introspection python spell"
> You have (via package.use, make.conf, or profile) invoked the "python"
> and "introspection" USE flags for gedit.  The bit...
Yes, I know what is wrong. But it's not only wrong for gedit, other
packages will fail as well, if I correct the settings for gedit.
>
>>   The following REQUIRED_USE flag constraints are unsatisfied:
>>     python? ( exactly-one-of ( python_single_target_python3_4
>> python_single_target_python3_5 ) )
> ...says that you need "exactly-one-of" the following...
>  ( python_single_target_python3_4 python_single_target_python3_5 )
>
>   Since you're using PYTHON_TARGETS="python3_4 -python3_5", the "local"
> option is to add the following line to package.use to apply to gedit only.
Yep, i know, and then the next package complains. So why didn't this
happen before? What changed?
>
> app-editors/gedit python_single_target_python3_4
>
>   You might consider the "global" option, which is to change make.conf
> to read PYTHON_SINGLE_TARGET="python3_4" if that doesn't cause rebuilds
> all over the place.
I already tried that. Then other packages complain because they are not
compatible to the settings gedit requires.
>
>   In either case, when upgrading from python 3.4 to 3.5 in the future,
> you'll have to change "3.4" to "3.5" in make.conf and/or package.use.
Can't I just enable some default settings somewhere? I don't want to
introduce dozens of local settings for packages, especially as
everything used to work before.

  Ralf