RE: Unable to enable the standard library in nRF Connect SDK 2.2.0

Einar Thorsrud — Fri, 16 Dec 2022 13:06:07 GMT

Hi,

You get the error because it is not allowed to set CONFIG_REQUIRES_FULL_LIBC=y (it is used internally). A typical set of configurations sensible for using STL is:

CONFIG_CPLUSPLUS=y
CONFIG_LIB_CPLUSPLUS=y
CONFIG_NEWLIB_LIBC=y

I tested this on my end, taking the C++ Synchronization sample and adding #include <vector>, and this function that I call in the main loop (demonstrating some basic STL usage with vector):

void stl_stuff(void)
{
	std::vector<int> array;

	array.reserve(20);
	for(int i=0; i<5; ++i)
	{
		array.push_back(i);
	}

	printk("Array capacity: %u\n", array.capacity());
	printk("Array size: %u\n", array.size());

	for(const auto &element : array)
	{
    		printk("Element value: %i\n", element);
	}
}

That worked as expected on my end.