RE: How to include cJSON library in the project.

Nordic_Swapnil — Mon, 30 Sep 2024 05:52:08 GMT

what about CMakeLists.txt

buddy you just gave prj.conf and main.c

Raoul — Mon, 26 Sep 2022 11:25:21 GMT

Hi!

Kconfig options often have other Kconfig options as dependencies. It might be that you haven't configured the dependencies for CONFIG_CJSON_LIB.

If you look at the Kconfig reference page or in the VS Code Kconfig menu, note the following:

Dependencies: (CONFIG_NEWLIB_LIBC && CONFIG_NEWLIB_LIBC_FLOAT_PRINTF) || CONFIG_EXTERNAL_LIBC
(Note the "||" (OR) sign, configuring the first two options is enough.)

When I configure these dependencies in prj.conf of the Hello World sample:

CONFIG_CJSON_LIB=y
CONFIG_NEWLIB_LIBC=y
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y

I can use the cJSON library:

#include <zephyr/zephyr.h>
#include <cJSON.h>

void main(void)
{
	printk("cJSON version %s\n", cJSON_Version());
}

Hope this solves your problem.

Best regards,
Raoul