Is there a way to tell gcc to allocate local variable on the heap not the default stack?

[Remus Clearwater]

Hi, for some reason, I want to keep the stack frame usage of some functions
as smaller as possible, but rewrite them by hands is such a pain and very
stupid since they are using many and big local variables currently. And in
these functions they doesn't do anything like longjmp.

So, is there a option to tell gcc to allocate local variable on the heap
not the default stack (auto free them before return)?

Thanks a lot.