get compile timestamp iphone sdk

Question

How can i get the timestamp of when an application was compiled for iphone

At the moment I've got this method on my app delegate

- (NSDate*) compiledAt {
    NSDateFormatter *k= [[NSDateFormatter alloc] init];
    [k setDateFormat:@"MMM d yyyy HH:mm:ss"] ;
    NSString *dateString = [[[NSString stringWithUTF8String:__DATE__] stringByAppendingString: @" "] stringByAppendingString:[NSString stringWithUTF8String:__TIME__]];
    NSDate *d=[k dateFromString:dateString];
    NSLog(@"%@",d);
    [k release];
    return d;
}

Which works but seems unnecessary given that all I really need is a constant that is defined automatically at compile time.