Re: Python 3.5 start of update

[Leo Famulari]

On Fri, Feb 26, 2016 at 09:19:40PM -0800, Diane Trout wrote:
> Hi,
> 
> Attached is the patch I used for trying to update python 3 to 3.5. I disabled 
> a test and added an exception handler for some code calling pwd.getpwuid(0) 
> and the group equivalent.
> 
> It builds outside of the python.scm module but if I change the version in 
> python.scm python-minimal ends up with a link error.
> 
> *** WARNING: renaming "_ctypes" since importing it failed: build/lib.linux-
> x86_64-3.5/_ctypes.cpython-35m-x86_64-linux-gnu.so: cannot open shared object 
> file: No such file or directory
> error: [Errno 2] No such file or directory: 'build/lib.linux-
> x86_64-3.5/_ctypes.cpython-35m-x86_64-linux-gnu.so' -> 'build/lib.linux-
> x86_64-3.5/_ctypes.cpython-35m-x86_64-linux-gnu_failed.so'
> Makefile:608: recipe for target 'sharedmods' failed
> 
> I'm currently pretty baffled by the link error as if I do --keep-failed I can 
> get it to build with:
> cd /tmp/nix-builc-python-minimal-3.5.1.drv
> chown -R me .
> guix environment python-minimal
> cd Python-3.5.1
> make

Thanks for attempting this major upgrade!

I think that using `guix environment python-minimal` will not get you
the exact environment that exists while building with the daemon.

Without the '--pure' or '--container' options, `guix environment`
augments your existing environment rather than replacing it.

Also, the 'python-minimal' offered by `guix environment python-minimal`
is likely the one that lives on the master branch, deployed by `guix
pull`, unless you symlinked your git checkout to
'~/.config/guix/latest'.

Could you try something like this, having checked out the branch where
you are attempting this upgrade:

`~/src/guix/pre-inst-env guix environment --pure python-minimal`

I would suggest '--container' but you'd have to make some changes to
your system if you are on Debian.

You could also try to source the 'environment-variables' file in the
failed build directory, although you will again want to unset your
pre-existing environment first (I'm not sure how to do that).

Sorry if I've misunderstood your dilemma.