diff -ur busybox-1.15.3/debian/rules busybox_patched/debian/rules
--- busybox-1.15.3/debian/rules	2010-08-19 14:09:06.000000000 +0000
+++ busybox_patched/debian/rules	2010-08-24 13:15:59.164320767 +0000
@@ -3,7 +3,9 @@
 SHELL := sh -e
 DEB_HOST_ARCH := $(shell dpkg-architecture -qDEB_HOST_ARCH)
 DEB_BUILD_ARCH := $(shell dpkg-architecture -qDEB_BUILD_ARCH)
-SOURCE := $(shell dpkg-parsechangelog | sed -ne 's,^Source: *\(.*\)$$,\1,p')
+# To detect cross building
+DEB_BUILD_GNU_TYPE	?= $(shell dpkg-architecture -qDEB_BUILD_GNU_TYPE)
+DEB_HOST_GNU_TYPE	?= $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)SOURCE := $(shell dpkg-parsechangelog | sed -ne 's,^Source: *\(.*\)$$,\1,p')
 VERSION_DEBIAN := $(shell dpkg-parsechangelog | sed -ne 's,^Version: *\(.*\)$$,\1,p')
 VERSION := $(shell echo "$(VERSION_DEBIAN)" | sed -e 's,^[^:]*:,,' -e 's,-[^-]*$$,,')
  
@@ -20,6 +22,7 @@
 
 setup: $(STAMPS_DIR)/setup_deb $(STAMPS_DIR)/setup_static $(STAMPS_DIR)/setup_udeb $(STAMPS_DIR)/setup_initramfs
 
+# Set the cross compiler prefix for cross compiles
 $(STAMPS_DIR)/setup_%: SOURCE_FILES = $(filter-out debian, $(wildcard * .[^.]*))
 $(STAMPS_DIR)/setup_%: DIR=$(BUILD_DIR)/build_$*
 $(STAMPS_DIR)/setup_%: $(STAMPS_DIR)/patch
@@ -27,6 +30,11 @@
 	rm -rf '$(DIR)'
 	mkdir -p '$(DIR)'
 	cp -a $(SOURCE_FILES) '$(DIR)'
+ifneq ($(DEB_BUILD_GNU_TYPE),$(DEB_HOST_GNU_TYPE))
+	cp debian/config/$* debian/config/$*.orig
+	nawk '/CONFIG_CROSS_COMPILER_PREFIX=/ {gsub("\"\"", "\"$(DEB_HOST_GNU_TYPE)-\"") ;print $0; next};{print $0}'  debian/config/$*  > afile
+	mv afile debian/config/$*
+endif
 	cp debian/config/$* '$(DIR)'/.config
 	$(MAKE) -C '$(DIR)' oldconfig
 	touch $@
@@ -50,8 +58,17 @@
 maintainerclean:
 	rm -rf $(filter-out .svn debian, $(wildcard * .[^.]*))
 
+# Clean away any cross build configurations
 clean:
 	dh_testdir
+ifneq ($(DEB_BUILD_GNU_TYPE),$(DEB_HOST_GNU_TYPE))
+	@-files=`ls debian/config/*.orig` 	;\
+	for f in $$files			;\
+	do					 \
+		name=$${f%.*}			;\
+		mv $$f $$name			;\
+	done					;
+endif
 	rm -rf $(BUILD_DIR) $(STAMPS_DIR)
 	dh_clean