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2018-09-23Fix formatting nit in user-defined Python function testsUlf Magnusson
2018-09-23Add support for user-defined Python preprocessor functionsUlf Magnusson
Allow preprocessor functions to be defined in Python by putting a module called 'kconfigfunctions' into sys.path. Internally, this simply adds the functions to the predefined functions in Kconfig._functions. User-defined Python functions make it simple to integrate information from existing Python tools into Kconfig, e.g. to have Kconfig symbols depend on hardware information stored in some other format. This might be used to get device tree information into Kconfig in Zephyr. Piggyback module docstring documentation for some extensions that were previously only mentioned in the README.