On Fri, Feb 08, 2013 at 07:09:28AM -0800, Matt Kraai wrote:
> From: Matt Kraai <matt.kr...@amo.abbott.com>
> QNX 6.3.2 uses GCC 2.95.3 by default, and GCC 2.95.3 doesn't remove the
> comma if the error macro's variable argument is left out.
> Instead of testing for a sufficiently recent version of GCC, make
> __VA_ARGS__ match all of the arguments.
> * Let callers be aware of the constant return value; this can help
> - * gcc with -Wuninitialized analysis. We have to restrict this trick to
> - * gcc, though, because of the variadic macro and the magic ## comma pasting
> - * behavior. But since we're only trying to help gcc, anyway, it's OK; other
> - * compilers will fall back to using the function as usual.
> + * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
> + * because some compilers may not support variadic macros. Since we're only
> + * trying to help gcc, anyway, it's OK; other compilers will fall back to
> + * using the function as usual.
> #if defined(__GNUC__) && ! defined(__clang__)
> -#define error(fmt, ...) (error((fmt), ##__VA_ARGS__), -1)
> +#define error(...) (error(__VA_ARGS__), -1)
Acked-by: Jeff King <p...@peff.net>
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