CMake can automatically invoke configuration at build time when any dependency has been modified. For instance, after you edited CMakeLists.txt. Of when you used add_subdirectory() and edited nested CMakeLists.txt. Or if you have include("myscript.cmake") and modified myscript.cmake.
I am curious which command in CMake can be used to add arbitrary dependency. For instance, I have python script which is executed at configuration stage with execute_process(). Obviously I want to trigger reconfiguration when this script was edited, since it is an essential part of the CMake script (just written in different language).
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