How can we know the caller function's name?

Question

In the C language, __FUNCTION__ can be used to get the current function\'s name. But if I define a function named a() and it is called

Answer 1

#include 
#include 

#define FUNCTION_NAME(FUNCTION) printf("FUNCTION=%s \r\n", #FUNCTION);

int a() {
  printf("A function call");
}

int b() {
  printf("B function call");
}

int main(){
FUNCTION_NAME(a);
FUNCTION_NAME(b);
return 0;

}