1 #include <stdio.h> 2 main(void)3 int main(void) 4 { 5 #ifdef FOO 6 printf("Foo configuration\n"); 7 #endif 8 #ifdef DEBUG 9 printf("Debug configuration\n"); 10 #endif 11 #ifdef RELEASE 12 printf("Release configuration\n"); 13 #endif 14 return 0; 15 } 16