Global constructor call not in .init_array section

I'm trying to add global constructor support on an embedded target (ARM Cortex-M3). Lets say I've the following code:

class foobar
{
    int i;

public:
    foobar()
    {
        i = 100;
    }

    void inc()
    {
        i++;
    }
};

foobar foo;

int main()
{
    foo.inc();
    for (;;);
}

I compile it like this:

arm-none-eabi-g++ -O0 -gdwarf-2 -mcpu=cortex-m3 -mthumb -c foo.cpp -o foo.o

When I look at the .init_array section with objdump it shows the .init_section has a zero size.

I do get an symbol named _Z41__static_initialization_and_destruction_0ii. When I disassemble the object file I see that the global construction is done in the static_initialization_and_destruction symbol.

Why isn't a pointer added to this symbol in the .init_section?