Torsten Rasmussen ea082ac2c9 cmake: only write devicetree files when there are changes. ... As part of #40167 is was discovered that devicetree headers are always generated when CMake re-runs. This causes all source files that directly or indirectly through included headers to recompile when CMake re-runs, even if there are no changes to devicetree. This commits introduces `zephyr_file_copy(...)` similar to `file(COPY_FILE ...)` from CMake 3.21. However, as CMake 3.20 is supported by Zephyr we need a zephyr variant of this function to allow usage with CMake 3.20. This ensures that only when there are changes to devicetree headers, then source files will recompile. Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>		2022-02-11 15:47:09 +01:00
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generated	cmake: only write devicetree files when there are changes.	2022-02-11 15:47:09 +01:00
empty_file.c	Introduce cmake-based rewrite of KBuild	2017-11-08 20:00:22 -05:00