Re: [gentoo-user] Recent change in python - some packages are not happy

[Alec Ten Harmsel]

On Sat, Jun 23, 2018 at 10:38:35AM +0100, Mick wrote:
> On Saturday, 23 June 2018 10:30:09 BST Neil Bothwick wrote:
> > On 23 June 2018 10:14:31 BST, Mick <michaelkintzios@×××××.com> wrote:
> > >I came up to this today following a portage sync:
> > >
> > ># emerge -uaNDv world
> > >
> > >
> > >These are the packages that would be merged, in order:
> > >
> > >Calculating dependencies /
> > >
> > >!!! Problem resolving dependencies for sys-devel/gdb from @selected
> > >.. done!
> > >
> > >
> > >!!! The ebuild selected to satisfy "sys-devel/gdb" has unmet
> > >requirements.
> > >- sys-devel/gdb-7.12.1::gentoo USE="client nls python server xml -lzma
> > >-
> > >multitarget -test -vanilla" ABI_X86="(64)"
> > >PYTHON_SINGLE_TARGET="-python2_7 -
> > >python3_4 -python3_5" PYTHON_TARGETS="python2_7 -python3_4 -python3_5"
> > >
> > >  The following REQUIRED_USE flag constraints are unsatisfied:
> > >    python? ( exactly-one-of ( python_single_target_python2_7
> > >
> > >python_single_target_python3_4 python_single_target_python3_5 ) )
> > >
> > > .......
> >
> > Start with "grep - ir python /etc/portage". That found the source of the
> > problem on one of my systems, I was setting PYTHON_SINGLE_TARGET for one
> > package.
>
> Thanks Neil, I already had a look just in case I had set something up and
> forgot about it.  This is all it showed:
>
> # grep -ir python /etc/portage
> /etc/portage/package.use/package.use:=media-libs/lcms-1.19-r1 python
>

How about `emerge --info | grep PYTHON_SINGLE_TARGET'? The problem looks
to be:

> PYTHON_SINGLE_TARGET="-python2_7 -python3_4 -python3_5"

At least one PYTHON_SINGLE_TARGET needs to be set. I'd guess that
PYTHON_SINGLE_TARGET got updated to 3.6, leaving GDB in its dust.

Alec