does g++ delay initializing static local variables?

[Brendan Miller <catphive at catphive dot net>]

Say I have a C++ function like this:

void my_function() {
    static int x = 0;
}

Then will initialization of x to 0 be delayed until the first call of
the function? The ABI spec talks about that here:
http://www.codesourcery.com/public/cxx-abi/abi.html#once-ctor

I was unclear whether this only applies to objects with constructors,
or whether it also applies to POD initialized with a constant, as
above.

In this case, I'm especially curious about g++ 4.1's implementation.

Sorry if this is an overly obscure question.