[U-Boot] [PATCH] Reduce build times

[Mike Frysinger]

On Wednesday 02 November 2011 02:54:02 Wolfgang Denk wrote:
> U-Boot Makefiles contain a number of tests for compiler features etc.
> which so far are executed again and again.  On some architectures
> (especially ARM) this results in a large number of calls to gcc.

seems to shave ~10% off for Blackfin boards
Acked-by: Mike Frysinger <vapier at gentoo.org>

> Note:  There is further potential for build time reductions by
> performing similar optimizations for a number of $(shell ...)
> constructs in the Makefiles, but I have no good ways to test these at
> the moment so this is left as exercise for the respective
> architecture maintainers (mostly blackfin and coldfire, AFAICT) -- wd

Blackfin does two $(shell), one of which i already cache.  the other, i should 
be able to send a patch for.
-mike
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