Re: Attribute questions

[Richard Henderson <rth at redhat dot com>]

On Thu, Jun 28, 2001 at 09:16:10PM -0700, Mark Mitchell wrote:
> 1.The manual says that the `unused' attribute applied to functions
>   is not supported by G++ "as definitions without parameters are
>   valid in C++".  This seems confused.  The `unused' attribute
>   applied to a function means that the function is not used; what,
>   if anything, has this to do with its parameters?

Look at the definition of UNUSED in gthr-single.h.  I'd actually
like this fixed so that code can be more easily shared between
GNU C and GNU C++.

> 2.Do people really use "prefix attributes"?  They are undocumented,
>   as far as I can tell.  (This is the bit where you fix attributes
>   in with the decl-specifier-seq in a declaration, like this:
> 
>     void __attribute__ ((pure)) f();
> 
>   Very ugly.  I expect we daren't remove these, right?

That's where windows puts its attributes, e.g. __declspec(dllexport).

It's also the only way to put attributes on function definitions,
rather than declarations.  E.g.

static void __attribute__((noreturn))
panic(int error_code)
{
  ...
}

I rather like it, myself.

> 3. The manual contains anti-#pragma rhetoric.
[...]
>    Can we just remove this bit of editorialization from the macro?

Please.


r~