undefined reference to `z_impl_k_event_init' on ncs v2.5.2

[snowuyl]

I would like to test event related functions on nRF5340 DK. But west build failed with undefined reference to `z_impl_k_event_init'. The following are log messages of west build command.

c:/ncs/toolchains/c57af46cb7/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd.exe: app/libapp.a(main.c.obj): in function `k_event_init':
C:\ncs\v2.5.2\nrf\samples\event\build/zephyr/include/generated/syscalls/kernel.h:794: undefined reference to `z_impl_k_event_init'

[snowuyl]

#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
#include <zephyr/sys/printk.h>


LOG_MODULE_REGISTER(main);
static struct k_event event;

int main(void)
{
    k_event_init(&event);

    return 0;
}

[Turbo J]

Needs CONFIG_EVENTS=y in prj.conf (see docs).

Several of the kernel APIs have their own Kconfig enable switches in order to improve code size.

[snowuyl]

Thanks for your great support! This issue has been fixed after adding CONFIG_EVENTS=y to prj.conf file.