1 files changed, 47 insertions, 0 deletions
diff --git a/scripts/mkmakefile b/scripts/mkmakefile
new file mode 100755
index 000000000..38d826853
--- /dev/null
+++ b/scripts/mkmakefile
@@ -0,0 +1,47 @@
+#!/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
+
+
+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 $2/Makefile
+then
+	exit 0
+fi
+if [ "${quiet}" != "silent_" ]; then
+	echo "  GEN     $2/Makefile"
+fi
+
+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 all Makefile,\$(MAKECMDGOALS))
+
+all:
+	\$(MAKE) \$(MAKEARGS) \$(all)
+
+Makefile:;
+
+\$(all): all
+	@:
+
+%/: all
+	@:
+EOF