tree e5e62e04ca2d6f834aed9925a13869f730656139
parent 52bcc3308ae3344266f55bf98a22c1ac0201eda7
author Sam Ravnborg <sam@neptun.(none)> 1192479445 +0200
committer Sam Ravnborg <sam@neptun.(none)> 1192479445 +0200

kbuild: enable 'make CPPFLAGS=...' to add additional options to CPP

The variable CPPFLAGS is a wellknown variable and the usage by
kbuild may result in unexpected behaviour.

This patch replace use of CPPFLAGS with KBUILD_CPPFLAGS all over the
tree and enabling one to use:
make CPPFLAGS=...
to specify additional CPP commandline options.

Patch was tested on following architectures:
alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k, s390

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>