iphone - How to get executing line number, method name and file name at runtime in Objective C(Dynamically)

Question

I am developing an iphone application. I want log file name, method name and line number of the method while it is executing. I have used following code for getting the required values.

NSLog(@"Hi! I'm in method %s at %s:%u", __FUNCTION__, __FILE__, __LINE__);

But, I want to log the values dynamically without using NSLogs in code.

I have tried environment variable NSObjCMessageEnabled: YES which gives only method names, but I want file name and line number as well. Please help.