Re: Suspicious warning in W64 build

[Paul Eggert]

Eli Zaretskii wrote:
> It expands into an assignment, so it's an assignment.

UNINIT does not expand into an assignment. Sometime it expands into nothing. At 
other times it expands into '=' followed by an initializer. Neither is an 
assignment. And either way, the user of UNINIT is not supposed to care what 
UNINIT expands into; that's an implementation detail. From the user's point of 
view, UNINIT is a declarator attribute.

There are lots more syntactically-incorrect macros other than the UNINIT and the 
ATTRIBUTE_* ones. They include DECLARE_POINTER_ALIAS, FALLTHROUGH, INLINE, 
FOR_EACH_TAIL, and the list goes on and on. I agree that we should avoid such 
constructs if possible, but each of these constructs is useful and is 
unavoidably outside the usual C syntax. UNINIT is similar.