Sample of simple macro to print log messages including the function & line where it's logged

print.c

#include <stdio.h>
#define PRINT(...) \
    printf("%s():%03u ", __FUNCTION__, __LINE__); \
    printf(__VA_ARGS__); \
    printf("\n");

int main()
{
    PRINT("Hello world")
    /* It should render:
    main():009 Hello world */
    return 0;
}