6b13f685e
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#!/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 convenient build of external modules
# Usage
# $1 - Kernel src directory
# $2 - Output directory
test ! -r $2/Makefile -o -O $2/Makefile || exit 0
# Only overwrite automatically generated Makefiles
# (so we do not overwrite buildroot Makefile)
if test -e $2/Makefile && ! grep -q Automatically $2/Makefile
then
exit 0
fi
echo " GEN $2/Makefile"
cat << EOF > $2/Makefile
# Automatically generated by $0: don't edit
lastword = \$(word \$(words \$(1)),\$(1))
makedir := \$(dir \$(call lastword,\$(MAKEFILE_LIST)))
MAKEARGS := -C $1
MAKEARGS += O=\$(if \$(patsubst /%,,\$(makedir)),\$(CURDIR)/)\$(patsubst %/,%,\$(makedir))
MAKEFLAGS += --no-print-directory
.PHONY: _all \$(MAKECMDGOALS)
all := \$(filter-out Makefile,\$(MAKECMDGOALS))
_all:
umask 0022 && \$(MAKE) \$(MAKEARGS) \$(all)
Makefile:;
\$(all): _all
@:
%/: _all
@:
EOF
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