Ran menuconfig
Ran make and got
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/home/esp32/esp-idf/components/driver/./rmt.c: In function 'rmt_driver_uninstall':
/home/esp32/esp-idf/components/driver/./rmt.c:616:5: error: implicit declaration of function 'free' [-Werror=implicit-function-declaration]
free(p_rmt_obj[channel]);