esp-idf/docs/en/migration-guides/system.rst

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Migrate System to ESP-IDF 5.0
==================================
Inter-Processor Call
-----------------------
IPC (Inter-Processor Call) component has been moved to ``esp_system``.
Thus, any project presenting a ``CMakeLists.txt`` file with the parameters ``PRIV_REQUIRES esp_ipc`` or ``REQUIRES esp_ipc``, should be modified to simply remove these options as ``esp_system`` component is included by default.
ESP Clock
---------
The old headers ``{IDF_TARGET_NAME}/clk.h``, ``esp_clk.h`` have been removed.
Therefore, If you want to use the function with the prefix ``esp_clk`` please include ``esp_private/esp_clk.h`` instead.
Cache Error Interrupt
---------------------
The old headers ``{IDF_TARGET_NAME}/cache_err_int.h`` have been removed. Please include ``esp_private/cache_err_int.h`` instead.
Brownout
--------
The header ``brownout.h`` has been made private. ESP-IDF developers should include ``esp_private/brownout.h`` instead.
Trax
----
The header ``trax.h`` has been made private. ESP-IDF developers should include ``esp_private/trax.h`` instead.