How to configure the extension to recognize and support block-callbacks?

[vladfrangu]

I'm currently writing a small project in C which uses block callbacks (at least that's how I found them to be named).

A similar syntax to what is giving me errors can be found from qsort_b: qsort_b(void *base, size_t nel, size_t width, int (^compar)(const void *, const void *));

For some reason the extension doesn't recognize this syntax as valid (which is fair, it doesn't seem to be standard per-say). But gcc, the compiler I'm using, does recognize this syntax and works with it. Is there any way to make the extension recognize it too?