#!/bin/sh# Generates a small Makefile used in the root of the output# directory, to allow make to be started from there.# The Makefile also allow for more convinient build of external modules # Usage# $1 - Kernel src directory# $2 - Output directory# $3 - version# $4 - patchlevel  test ! -r $2/Makefile -o -O $2/Makefile || exit 0# Only overwrite automatically generated Makefiles# (so we do not overwrite kernel Makefile)if test -e $2/Makefile && ! grep -q Automatically $2/Makefilethen	exit 0fiif [ "${quiet}" != "silent_" ]; then	echo "  GEN     $2/Makefile"fi cat << EOF > $2/Makefile# Automatically generated by $0: don't edit VERSION = $3PATCHLEVEL = $4 lastword = \$(word \$(words \$(1)),\$(1))makedir := \$(dir \$(call lastword,\$(MAKEFILE_LIST))) ifeq ("\$(origin V)", "command line")VERBOSE := \$(V)endififneq (\$(VERBOSE),1)Q := @endif MAKEARGS := -C $1MAKEARGS += O=\$(if \$(patsubst /%,,\$(makedir)),\$(CURDIR)/)\$(patsubst %/,%,\$(makedir)) MAKEFLAGS += --no-print-directory .PHONY: __sub-make \$(MAKECMDGOALS) __sub-make:	\$(Q)\$(MAKE) \$(MAKEARGS) \$(MAKECMDGOALS) \$(filter-out __sub-make, \$(MAKECMDGOALS)): __sub-make	@:EOF