Hi, I wanted to do compile time string const comparison in a macro call but I could not find anything in GCC. I tried using __builtin_ extended option but it is not working inside a macro. Here is the sample code: #define STRCMP(s1,s2) __builtin_strcmp(s1,s2) int main() { #if STRCMP("pintu1","pintu2") printf("Equal...\n"); #else printf("Not Equal...\n"); #endif return 0; } But I am getting this error : error: missing binary operator before token "(" I tried other option such as __builtin_expect, __builtin_constant_p etc but same problem when used inside macro call Please help. Thanks, Pintu