#include <alloca.h>
#include <stdio.h>

#define ssprintf(...) \
	({ int _ss_size = snprintf(0, 0, ##__VA_ARGS__);	\
	char *_ss_ret = __builtin_alloca(_ss_size+1);		\
	snprintf(_ss_ret, _ss_size+1, ##__VA_ARGS__);		\
	_ss_ret; })

int main() {
	char *tmp[5];
	tmp[0] = ssprintf("This text is dynamically allocated");
	tmp[1] = ssprintf("on the stack frame of main() and doesn't");
	tmp[2] = ssprintf("need to be freed explicitely. It is");
	tmp[3] = ssprintf("automatically freed when the function returns.");
	tmp[4] = ssprintf("%s\n%s\n%s\n%s\n", tmp[0], tmp[1], tmp[2], tmp[3]);
	printf("\nt: %p\t0: %p\t1: %p\n2: %p\t3: %p\t4: %p\n\n%s\n",
			tmp, tmp[0], tmp[1], tmp[2], tmp[3], tmp[4], tmp[4]);
	return 0;
}