#import <Foundation/Foundation.h>
 
#if DEBUG == 0
#define DebugLog(...)
#elif DEBUG == 1
#define DebugLog(...) NSLog(__VA_ARGS__)
#endif
 
int main()
{
   DebugLog(@"Debug log, our custom addition gets \
   printed during debug only");
   NSLog(@"NSLog gets printed always" );     
   return 0;
}