[U-Boot] [PATCH] ppc4xx: Enable support for 64bit printf on all PPC4xx variants

Wolfgang Denk
2009-07-08T21:24:01Z

Dear Scott Wood,

In message <4A550B66.1090506@freescale.com> you wrote:
>
> Note that the overhead of 64-bit printf (assuming the 64-bit
> divide/remainder functions in libgcc aren't pulled in for anything else)
> is 2524 bytes on powerpc (using GCC 4.3.2). That's less than NFS,
> which gets turned on by default (as was brought up recently). :-)

But compare the functionality...

> What if we were to invert the option (CONFIG_SYS_NO_64BIT_VSPRINTF) so
> that it would only be disabled on boards at the intersection of tight
> space constraints and a board maintainer who's pretty sure this board
> doesn't need it? There could also be some warning from printf() if %ll
> is used when not supported, and/or it could still check for %ll and pop
> a long long from the varargs but discard the high half.

And by default we would add CONFIG_SYS_NO_64BIT_VSPRINTF to all board
config files?

Best regards,

Wolfgang Denk

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