# $4 - patchlevel
-cat << EOF
+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/Makefile
+then
+ exit 0
+fi
+echo " GEN $2/Makefile"
+
+cat << EOF > $2/Makefile
# Automatically generated by $0: don't edit
VERSION = $3
.PHONY: all \$(MAKECMDGOALS)
+all := \$(filter-out all Makefile,\$(MAKECMDGOALS))
+
all:
- \$(MAKE) -C \$(KERNELSRC) O=\$(KERNELOUTPUT)
+ \$(MAKE) -C \$(KERNELSRC) O=\$(KERNELOUTPUT) \$(all)
Makefile:;
-\$(filter-out all Makefile,\$(MAKECMDGOALS)) %/:
- \$(MAKE) -C \$(KERNELSRC) O=\$(KERNELOUTPUT) \$@
+\$(all) %/: all
+ @:
EOF