On Fri, Aug 14, 2015 at 10:52:06PM +0800, Xiao Guangrong wrote:
> +#ifdef NVDIMM_DEBUG
> +#define nvdebug(fmt, ...) fprintf(stderr, "nvdimm: " fmt, ## __VA_ARGS__)
> +#else
> +#define nvdebug(...)
> +#endif
The following allows the compiler to check format strings and syntax
check the argument expressions:
#define NVDIMM_DEBUG 0 /* set to 1 for debug output */
#define nvdebug(fmt, ...) \
if (NVDIMM_DEBUG) { \
fprintf(stderr, "nvdimm: " fmt, ## __VA_ARGS__); \
}
This approach avoids bitrot (e.g. debug format string arguments have
become outdated).
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