While working on my new bindings project (using hsc2hs) I came across the __alignof__() statement available in GNU's C compiler. As it turns out, having this computed for me in Storable instances using something like this would be great:

instance Storable Foo where

    ....

    sizeOf _ = #{const sizeof(CFoo)}

    alignment _ = #{const __alignof__(CFoo)}

Can I rely on hsc2hs using GCC? How many people will hate me if I depend on GCC-specific extensions?

Legal? Acceptable? Infuriating?

/jve