#define STR(a) #a #define STR_(a) STR(a) #define CONCAT(a,b) a##b #define CONCAT_(a,b) CONCAT(a,b) #define M1(a) STR(CONCAT(a, __LINE__)) #define M2(a) STR_(CONCAT(a, __LINE__)) #define M3(a) STR(CONCAT_(a, __LINE__)) #define M4(a) STR_(CO…