gistfile1.m

// As-is, this code results in a compiler warning:
//   warning: property 'name' requires method '-name' to be defined - use @synthesize, @dynamic or provide a method implementation
//   warning: property 'name' requires the method 'setName:' to be defined - use @synthesize, @dynamic or provide a method implementation
// Set NEEDS_DYNAMIC to 1 to silence the warning.

#import <Foundation/Foundation.h>

#define NEEDS_DYNAMIC 0

@interface MyClass : NSObject
@property (retain) NSString *name;
@end
@implementation MyClass
#if NEEDS_DYNAMIC
@dynamic name;
#endif
@end

int main (int argc, const char * argv[]) {
    return 0;
}