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@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