#if defined DBG
        #define DEBUG_PRINT(...) printf("[DBG]: "); \
        printf(__VA_ARGS__); \
        putchar('\n')
#else
        #define DEBUG_PRINT(...) noop
#endif

Inspired from stackoverflow: https://stackoverflow.com/questions/20639632/how-to-wrap-printf-into-a-function-or-macro
This can be put into some sort of util.h