inform users Python3.5 will be dropped

[alexsavulescu]

• add warning in autotools
• add warning in CMake

[codecov-commenter]

Codecov Report

Merging #1224 (f7d17f3) into master (e642437) will increase coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1224      +/-   ##
==========================================
+ Coverage   31.86%   31.94%   +0.08%     
==========================================
  Files         572      572              
  Lines      108986   108986              
==========================================
+ Hits        34728    34816      +88     
+ Misses      74258    74170      -88     

Impacted Files	Coverage Δ
src/parallel/bbs.cpp	64.78% <0.00%> (+1.87%)	⬆️
src/parallel/bbssrv2mpi.cpp	54.59% <0.00%> (+3.44%)	⬆️
src/nrnmpi/bbsmpipack.cpp	86.44% <0.00%> (+12.42%)	⬆️
src/parallel/bbsclimpi.cpp	51.29% <0.00%> (+21.42%)	⬆️
src/parallel/bbssrvmpi.cpp	43.03% <0.00%> (+29.11%)	⬆️

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[pramodk]

So 4.5 is not considered? 😉 But if the idea is to remove this right after 8.0 then it's ok for me.

[alexsavulescu]

yes, didn;t want to spend much time on it. It was off the bat, no testing :) but I confirm it works from azure build logs

[nrnhines]

I'm not sure I see the point of this warning for users who build from source. Isn't it enough just to no longer supply wheels.

[ramcdougal]

Not supplying wheels and dropping support are two different things. If we drop support for 3.5, then we know e.g. dictionaries are always ordered, and we can simplify code that uses them going forward... And that if somebody builds from source and runs it with 3.5 anyways, things may or may not work.

[pramodk]

Also, I was under impression that we had some special code to handle Python 3.5 but could not find it in https://github.com/neuronsimulator/nrn/blob/master/src/nrnpython/nrnpython.cpp

[alexsavulescu]

Also, I was under impression that we had some special code to handle Python 3.5 but could not find it in https://github.com/neuronsimulator/nrn/blob/master/src/nrnpython/nrnpython.cpp

One example here: https://github.com/neuronsimulator/nrn/blob/master/share/lib/python/neuron/hclass35.py