esp-idf/tools/test_apps/build_system/rsource_test
..
main
CMakeLists.txt
Kconfig.extra
README.txt

README.txt

This project tests that use of rsource in Kconfig files. The main component will source a Kconfig file depending on the target (IDF_TARGET), which in turn will source a Kconfig file in the project directory -- all specified via relative paths.