[U-Boot] without board level config.mk How to add CPPFLAGS

[Wolfgang Denk <wd@denx.de>]

Dear zzs,

In message <20110329012444.GA2470@greatfirst.com> you wrote:
>
> And then how to do that thing : Append custom cpp flags to CPPFLAGS ?
> 
> e.g. -Wcomments
> 
> And after append them to CPPFLAGS, Does these flags appear in CFLAGS
> auto automatically ?

Use CFLAGS_$(BCURDIR) if you want to set this for all files in a
specific directory, or CFLAGS_$(BCURDIR)/$(@F) if you want to set
this for a single file only.

Best regards,

Wolfgang Denk

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