C Principals: Local string literal vs local value on stack

string_literal.c

#include <stdio.h>

int* foo(void);
int* foo2(void);
char* bar(void);
char* bar2(void);


int main(int argc, char* argv[])
{
    int *m = foo();
    int *m2 = foo2();
    printf("Printing local value of function foo = %d\n", *m);
    printf("Printing local value of function foo2 = %d\n", *m2);

    char *m3 = bar();
    char *m4 = bar2();
    printf("Printing local value of function bar = %s\n", m3);
    printf("Printing local value of function bar2 = %s\n", m4);
    return 0;
}

int* foo(void)
{
    int i = 10;  /* ON STACK!!! */
    return &i;										               \
}

int* foo2(void)
{
    int i = 12345;  /* ON STACK!!! */
    return &i;										               \
}

char* bar(void)
{
    char* str = "STRING";  /* string literal from RO section */
/* .section	.rodata */
/* .LC4: */
/* .string	"STRING" */
    return str;
}

char* bar2(void)
{
    char* str = "foobar2";  /* string literal from RO section */
    return str;
}