Re: __attribute__((unused))

[Maciej W. Rozycki]

On Fri, 15 Oct 2004, Frank van Maarseveen wrote:

> This makes sense, assuming the gcc info pages are correct:
> `unused'
>      This attribute, attached to a function, means that the function is
>      meant to be possibly unused.  GCC will not produce a warning for
>      this function.  GNU C++ does not currently support this attribute
>      as definitions without parameters are valid in C++.
> 
> `used'
>      This attribute, attached to a function, means that code must be
>      emitted for the function even if it appears that the function is
>      not referenced.  This is useful, for example, when the function is
>      referenced only in inline assembly.
> 
> So, a function could be "used" and "unused" at the same time:
> 
> 	unused -> don't warn
> 	used -> don't discard

 Except that "used" already implies no warning as it makes the function 
not unused anymore.

  Maciej
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