[U-Boot] [PATCH] cmd_bdinfo: simplify local static funcs a bit

[Mike Frysinger <vapier@gentoo.org>]

On Monday 31 October 2011 17:49:58 Simon Glass wrote:
> On Mon, Oct 31, 2011 at 2:15 PM, Tabi Timur-B04825 wrote:
> > On Sun, Oct 30, 2011 at 7:54 PM, Mike Frysinger wrote:
> >> -static void print_num(const char *, ulong);
> >> +__maybe_unused
> >> +static void print_num(const char *name, ulong value)
> >> +{
> >> +       printf("%-12s= 0x%08lX\n", name, value);
> >> +}
> > 
> > Will the linker remove the functions from the binary if they are unusued?
> 
> If built with -ffunction-sections and --gc-sections,, then the linker
> can do this sort of thing. Otherwise it can't, but the compiler can. I
> just tested Mike's code on my ARM compiler to make sure and it happily
> removed print_eth() when it was not used.

i don't think you need function-sections to make this happen.  since it is 
marked "static", gcc should do DCE on it.  the __maybe_unused markings is just 
to kill off any warnings about the func not being used (which might occur in 
the #ifdef jungle below).  that attribute does not tell gcc to retain the 
function even if it isn't referenced in this file (as far as gcc can tell).
-mike
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