CPU dependent code: how to avoid function pointers?

Question

I have performance critical code written for multiple CPUs. I detect CPU at run-time and based on that I use appropriate function for the detected CPU. So, now I have to use fun

Answer 1

Here's the exact answer that I was looking for.

 GCC's __attribute__((ifunc("resolver")))

It requires fairly recent binutils.
There's a good article that describes this extension: Gnu support for CPU dispatching - sort of...