2 # Generates a small Makefile used in the root of the output
3 # directory, to allow make to be started from there.
4 # The Makefile also allow for more convinient build of external modules
7 # $1 - Kernel src directory
8 # $2 - Output directory
13 test ! -r $2/Makefile -o -O $2/Makefile || exit 0
14 # Only overwrite automatically generated Makefiles
15 # (so we do not overwrite kernel Makefile)
16 if test -e $2/Makefile && ! grep -q Automatically $2/Makefile
20 echo " GEN $2/Makefile"
22 cat << EOF > $2/Makefile
23 # Automatically generated by $0: don't edit
28 lastword = \$(word \$(words \$(1)),\$(1))
29 makedir := \$(dir \$(call lastword,\$(MAKEFILE_LIST)))
32 MAKEARGS += O=\$(if \$(patsubst /%,,\$(makedir)),\$(CURDIR)/)\$(patsubst %/,%,\$(makedir))
34 MAKEFLAGS += --no-print-directory
36 .PHONY: all \$(MAKECMDGOALS)
38 all := \$(filter-out all Makefile,\$(MAKECMDGOALS))
41 \$(MAKE) \$(MAKEARGS) \$(all)