[PATCH 06/10] nvme-cli: add generic logging functionality

[Sagi Grimberg]

> From: Martin Wilck <mwilck at suse.com>
> 
> Add a msg() macro that allows more flexible customization of logging
> both at build time and at run time. Allow several log levels, using
> the well-known standard sylog levels. Also optionally allow printing
> of log timestamps.
> 
> Put '#define LOG_FUNCNAME' before '#include "util/log.h"' to enable printing
> the name of the calling function before the log message.
> 
> Use this functionality in the fabrics code for now, wherever fprintf(stderr, ...)
> had been used.
> 
> No functional change except changing the output channel of 554db7d ("print
> device name when creating a persistent device") from stdout to stderr.
> 
> Signed-off-by: Martin Wilck <mwilck at suse.com>
> ---
>   Makefile   |  2 +-
>   fabrics.c  | 85 ++++++++++++++++++++++++++++-----------------------
>   util/log.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
>   util/log.h | 34 +++++++++++++++++++++

I think it makes sense to do a wider sweep also for nvme.c and friends
no?