Context

Overview of the issue

When CoreNEURON is enabled in build, the hh.mod file gets updated in place, which means it's easy to check it in by accident.

Expected result/behavior

If changes to mod files are needed, the should probably be done in a separate directly that isn't tracked by source control.

NEURON setup

• Version: master branch

Minimal working example - MWE

• CMake build commands:

mkdir build && cd build
cmake -DNRN_ENABLE_CORENEURON=ON  ..
cmake --build . --