| #ifdef CHECK_FUNCTION_EXISTS | |
| char CHECK_FUNCTION_EXISTS(); | |
| #ifdef __CLASSIC_C__ | |
| int main(){ | |
| int ac; | |
| char*av[]; | |
| #else | |
| int main(int ac, char*av[]){ | |
| #endif | |
| CHECK_FUNCTION_EXISTS(); | |
| if(ac > 1000) | |
| { | |
| return *av[0]; | |
| } | |
| return 0; | |
| } | |
| #else /* CHECK_FUNCTION_EXISTS */ | |
| # error "CHECK_FUNCTION_EXISTS has to specify the function" | |
| #endif /* CHECK_FUNCTION_EXISTS */ |