How to prevent feature optimization

Question

I am optimizing all the code, but I do not want a certain function to be optimized, say, for debugging purposes. Is there a way to do this on the gcc 3.4+ compiler?

Answer 1

The easiest way: put the function in your own compilation unit, compile this flag without optimization flags.

Recent versions of gcc (4.4+, I think) have an attribute to control optimization for each function, use

__attribute__((optimize(0))) 

for disable optimization function