Kconfig

advanced usage guide

• menuconfig is a old system used by linux for configuration
• on running idf.py menuconfig, you see a menu, all the entries in it are generated by file Kconfig.

• Kconfig defines the entries of the menu

• Kconfig starts and ends with menu and endmenu it is must to see the it in menu ``` menu

endmenu

three data types only: 
* int
* string
* bool

we use `config` to configure a value

config MESSAGE_QUEUE_SIZE int “Queue Size” default 1000 help “Sets message queue size” ```

• So, all the values set by menuconfig are stored in a header file called sdkconfig.h, options are stored in sdkconfig file.
• So, if my config option is MESSAGE_QUEUE_SIZE, we can use this value by using macro named CONFIG_MESSAGE_QUEUE_SIZE
• All the config values are stored in form of a macro, and can be accessed by prefixing CONFIG_ with the name of the config value.