Subject: Re: bug#23640: 25.1.50; Getting rid of compiler warnings

From: Paul Eggert <[email-masked]>
Date: Tue, 7 Jun 2016 00:15:30 -0700

Richard Stallman wrote:

>    char *ident_start = UNUSED;

That would set ident_start to zero even when GCC warnings are disabled, which 
would be a bit slower since ident_start does not need to be initialized. 
Unfortunately there is no syntax in C for a no-op initializer, so there's no way 
to define UNUSED so that it initializes ident_start when GCC warnings are 
enabled and leaves ident_start uninitialized otherwise.