[U-Boot] [PATCH] config.mk: enable -fstack-usage only when it is desired

[Tom Rini]

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On 09/25/2013 10:17 PM, Masahiro Yamada wrote:
> As far as I know, gcc does not support -fstack-usage
> for some targets such as blackfin, m68k, microblaze, etc.
> 
> If -fstack-usage option is given for those targets,
> gcc displays a warning message as follows:
> 
>     warning: -fstack-usage not supported for this target [enabled by default]
> 
> But it still exits with status 0.
> 
> So,
> 
>     # Report stack usage if supported
>     CFLAGS_STACK := $(call cc-option,-fstack-usage)
>     CFLAGS += $(CFLAGS_STACK)
> 
> does not work as we expect because cc-option sees exit status
> to judge whether the given option is supported or not.
> 
> To suppress warnings for such targets that -fstack-usage is not supported,
> this commit surrounds the concerned lines with
> ifdef CONFIG_CC_STACKUSAGE .. endif.
> 
> Signed-off-by: Masahiro Yamada <yamada.m at jp.panasonic.com>
> Cc: Tom Rini <trini at ti.com>

The problem here is that except for whatever arches don't support
- -fstack-usage, we always want to generate this information, to assist in
debugging stack usage problems (which can be a real problem within SPL
for example).  How about ifneq($(CONFIG_M68K)$(CONFIG_...),y) ... endif
around it?

- -- 
Tom
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