How to force all functions to have full prologs and epilogs in optimized code?

[Yuri <yuri@xxxxxxxxx>]

I debug an application and need to know which function calls were made.
Many function though not inlined have optimized away epilogs, replaced 
by a jump.
And google-perftools tool for example doesn't pick such functions up.

Is there an option in gcc forcing it to emit full prologs/epilogs even 
for optimized code?

Yuri