[U-Boot] [PATCH 0/2] Add ccache support

These two patches make it easy to use ccache with U-Boot to speed up iterative builds.

The results of building SoC MXS without ccache: real 1m29.286s user 7m1.972s sys 0m46.668s

The results of building SoC MXS with ccache for the first time: real 1m37.551s user 7m23.632s sys 0m59.332s

The results of building SoC MXS with ccache again: real 0m41.968s user 1m9.912s sys 0m20.028s

The speedup is significant.

Marek Vasut (2): common: Add CCACHE variable to allow use of ccache common: Use separate dirs for each board for ccache

MAKEALL | 7 +++++++ config.mk | 8 +++++--- 2 files changed, 12 insertions(+), 3 deletions(-)