Re: [gentoo-user] Re: PYTHON_SINGLE_TARGET & libreoffice

[Alan McKinnon <alan.mckinnon@gmail.com>]

On 27/02/2016 22:16, Nikos Chantziaras wrote:
> On 27/02/16 21:40, Alan McKinnon wrote:
>> I don't know much about PYTHON_SINGLE_TARGET and PYTHON_TARGET, it all
>> seemed to just work so I never looked further. Until now. Of all
>> packages, libreoffice seems to want only python3:
>>
>> I can set it in make.conf but as expected that causes all manner of
>> other packages to fail emerge checks as they need python2.7.
>>
>> What's the preferred way to deal with this situation?
> 
>   PYTHON_TARGETS="python2_7 python3_4"
>   PYTHON_SINGLE_TARGET="python3_4"
> 
> For packages that require another PYTHON_SINGLE_TARGET version, you can
> set "python_single_target_python2_7" in package.use. For example:
> 
>   app-text/asciidoc python_single_target_python2_7
> 
> The reverse is also true. You can set:
> 
>   PYTHON_SINGLE_TARGET="python2_7"
> 
> in make.conf, and then set "python_single_target_python3_4" in
> package.use for packages that require 3.4:
> 
>   app-office/libreoffice python_single_target_python3_4
> 
> I use the first method.
> 
> Yes, it's a PITA :-)

I'll say.

Just got another one - sigil. That fails at build time, not at
emerge-initial-check-stuff time. So no problem I thought, I'll tweak
that one too. Now that causes 20 packages in dev-python like eg pillow,
six, etc to want the same tweak. And boost.

I have free time, I'll experiment with those now. I just hope it doesn't
break everything else using those packages



> PS:
> Another syntax is also available for package.use:
> 
>   app-text/asciidoc <other USE flags> PYTHON_SINGLE_TARGET: python2_7
> 
> Just saw a blog post about it; I think it's undocumented and works for
> all USE_EXPAND flags. The downside is that it has to appear at the end
> of the line.
> 
> 


-- 
Alan McKinnon
alan.mckinnon@gmail.com