#!/bin/sh
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# Generates a small Makefile used in the root of the output
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# directory, to allow make to be started from there.
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# The Makefile also allow for more convenient build of external modules
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# Usage
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# $1 - Kernel src directory
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# $2 - Output directory
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test ! -r $2/Makefile -o -O $2/Makefile || exit 0
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# Only overwrite automatically generated Makefiles
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# (so we do not overwrite buildroot Makefile)
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if test -e $2/Makefile && ! grep -q Automatically $2/Makefile
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then
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exit 0
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fi
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echo " GEN $2/Makefile"
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cat << EOF > $2/Makefile
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# Automatically generated by $0: don't edit
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ifeq ("\$(origin V)", "command line")
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VERBOSE := \$(V)
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endif
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ifneq (\$(VERBOSE),1)
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Q := @
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endif
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lastword = \$(word \$(words \$(1)),\$(1))
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makedir := \$(dir \$(call lastword,\$(MAKEFILE_LIST)))
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MAKEARGS := -C $1
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MAKEARGS += O=\$(if \$(patsubst /%,,\$(makedir)),\$(CURDIR)/)\$(patsubst %/,%,\$(makedir))
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MAKEFLAGS += --no-print-directory
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.PHONY: _all \$(MAKECMDGOALS)
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all := \$(filter-out Makefile,\$(MAKECMDGOALS))
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_all:
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\$(Q)umask 0022 && \$(MAKE) \$(MAKEARGS) \$(all)
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Makefile:;
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\$(all): _all
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@:
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%/: _all
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@:
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EOF
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