diff -Naur busybox.org/Makefile busybox/Makefile
--- busybox.org/Makefile	2013-06-29 11:00:18.000000000 -0400
+++ busybox/Makefile	2014-08-01 14:24:58.415831790 -0400
@@ -287,9 +287,12 @@
 MAKEFLAGS += -rR
 
 # Make variables (CC, etc...)
+ifeq ($(USE_CCACHE),1)
+CCACHE=ccache
+endif
 
 AS		= $(CROSS_COMPILE)as
-CC		= $(CROSS_COMPILE)gcc
+CC		= $(CCACHE) $(CROSS_COMPILE)gcc
 LD		= $(CC) -nostdlib
 CPP		= $(CC) -E
 AR		= $(CROSS_COMPILE)ar
@@ -316,7 +319,7 @@
 
 # Use LINUXINCLUDE when you must reference the include/ directory.
 # Needed to be compatible with the O= option
-CFLAGS		:= $(CFLAGS)
+CFLAGS		:= $(CFLAGS) -I$(objtree)/../../include/
 # Added only to final link stage of busybox binary
 CFLAGS_busybox	:= $(CFLAGS_busybox)
 CPPFLAGS	:= $(CPPFLAGS)
diff -Naur busybox.org/Makefile.flags busybox/Makefile.flags
--- busybox.org/Makefile.flags	2013-05-11 19:30:43.000000000 -0400
+++ busybox/Makefile.flags	2014-08-01 14:37:05.659845443 -0400
@@ -6,11 +6,31 @@
 export BB_VER
 SKIP_STRIP ?= n
 
+ifeq ($(ARCH),X86_64)
+CFLAGS  += -m64
+LDFLAGS += -m64
+endif
+
+
+
+ifneq ($(MULTI_ARCH_LIB), .)
+LDFLAGS += -L$(IMAGE_TREE)/lib/$(MULTI_ARCH_LIB) -L$(IMAGE_TREE)/usr/lib/$(MULTI_ARCH_LIB)
+EXTRA_LDFLAGS += -Wl,-L$(IMAGE_TREE)/lib/$(MULTI_ARCH_LIB) -Wl,-L$(IMAGE_TREE)/usr/lib/$(MULTI_ARCH_LIB)
+EXTRA_LDFLAGS += -Wl,-rpath-link=$(IMAGE_TREE)/lib/$(MULTI_ARCH_LIB) -Wl,-rpath-link=$(IMAGE_TREE)/usr/lib/$(MULTI_ARCH_LIB)
+EXTRA_LDFLAGS += -Wl,-rpath=/lib/$(MULTI_ARCH_LIB) -Wl,-rpath=/usr/lib/$(MULTI_ARCH_LIB)
+else
+LDFLAGS += -L$(IMAGE_TREE)/lib -L$(IMAGE_TREE)/usr/lib
+EXTRA_LDFLAGS += -Wl,-L$(IMAGE_TREE)/lib Wl,-L$(IMAGE_TREE)/usr/lib
+EXTRA_LDFLAGS += -Wl,-rpath-link=$(IMAGE_TREE)/lib Wl,-rpath-link=$(IMAGE_TREE)/usr/lib
+EXTRA_LDFLAGS += -Wl,-rpath=/lib Wl,-rpath=/usr/lib
+endif
+
 # -std=gnu99 needed for [U]LLONG_MAX on some systems
 CPPFLAGS += $(call cc-option,-std=gnu99,)
 
 CPPFLAGS += \
 	-Iinclude -Ilibbb \
+	-I$(TARGETDIR)/usr/include/ \
 	$(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include -I$(srctree)/libbb) \
 	-include include/autoconf.h \
 	-D_GNU_SOURCE -DNDEBUG \