Don't fail when pyc files in /usr/lib can't be removed sasview tries to open local_config.py using load_module_from_path() but local_config.py(c) will be in a read-only location in /usr/lib so this fails.
Set library location to pick up precompiled models models can be precompiled or compiled just-in-time; for a binary distribution such as Debian, it makes sense to precompile the models and ship them in the package.
Make tests discovery compatible with pytest 6 The 'args' keyword for the pytest.Function.from_parent constructor was removed with pytest 6. It was unused in pytest [1] and was always an empty tuple in the sasmodels code. [1] https://github.com/pytest-dev/pytest/pull/7226 This patch backported from the one provided to upstream.
Make compiled models reproducible The C code for the compiled modules is generated on-the-fly, with several source files being concatenated and #line directives added to the source too. This patch makes the compiled modules reproducible by: - stripping the varying build path off the front of the filename in the #line directives so that only the relative path to the source is used. - saving the generated C source in a stable file location if it is precompiled models that are being generated rather than JIT models.
