Patchwork [U-Boot,v4,17/37] kbuild: change out-of-tree build

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Submitter Masahiro Yamada
Date Jan. 10, 2014, 6:44 a.m.
Message ID <1389336274-7234-18-git-send-email-yamada.m@jp.panasonic.com>
Download mbox | patch
Permalink /patch/309145/
State Superseded
Delegated to: Tom Rini
Headers show

Comments

Masahiro Yamada - Jan. 10, 2014, 6:44 a.m.
This commit changes the working directory
where the build process occurs.

Before this commit, build process occurred under the source
tree for both in-tree and out-of-tree build.

That's why we needed to add $(obj) prefix to all generated
files in makefiles like follows:
  $(obj)u-boot.bin:  $(obj)u-boot

Here, $(obj) is empty for in-tree build, whereas it points
to the output directory for out-of-tree build.

And our old build system changes the current working directory
with "make -C <sub-dir>" syntax when descending into the
sub-directories.

On the other hand, Kbuild uses a different idea
to handle out-of-tree build and directory descending.

The build process of Kbuild always occurs under the output tree.
When "O=dir/to/store/output/files" is given, the build system
changes the current working directory to that directory and
restarts the make.

Kbuild uses "make -f $(srctree)/scripts/Makefile.build obj=<sub-dir>"
syntax for descending into sub-directories.
(We can write it like "make $(obj)=<sub-dir>" with a shorthand.)
This means the current working directory is always the top
of the output directory.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
---

This patch seems a big change at a glance.
But the idea is pretty simple.

The major change in the top Makefile is imported
from Linux Kernel from Linux Kernel.

The rest parts are for adjusting prefixes.

  - omit $(obj) prefixes for files which are generated in
     the top directory
  - change $(obj)foo to $(obj)/foo for files which are generated
     under sub directories.
  - add $(srctree)/ or $(src)/ prefixes when we need to point
     to the source files.
  - The environmanet BUILD_DIR has been renamed to KBUILD_OUTPUT.
    So, this commit modifies MAKEALL too.

FYI:
Basic structure of the top Makefile is as follows:

ifeq ($(KBUILD_SRC),)

ifeq ("$(origin O)", "command line")
  KBUILD_OUTPUT := $(O)
endif

ifneq ($(KBUILD_OUTPUT),)

   << define KBUILD_SRC and change directory and restart make >>

skip-makefile := 1
endif
endif

ifeq ($(skip-makefile),)

  <<Main part of Makefile>>

endif


Changes in v4:
  - Change a little checkstack target:
      Use $(src) rather than $(srctree) where Linux Kernel does so.

Changes in v3:
  - Rebase on the current u-boot/master

Changes in v2:
  - Rebase on v2014.01-rc2 tag
  - At version 1, sandbox got broken by this commit
    (and fixed again in the lator commit.)
    Fix this problem
  - Change a little MAKEALL
     Do not add "O=<dir>" if objtree is the same as srctree.
     This will be helpful at 35/35.

 MAKEALL                                       |   6 +-
 Makefile                                      | 559 ++++++++++++++------------
 arch/arm/cpu/arm1136/config.mk                |   2 +-
 arch/arm/cpu/arm926ejs/config.mk              |   2 +-
 arch/arm/cpu/arm926ejs/davinci/config.mk      |   2 +-
 arch/arm/cpu/armv7/am33xx/config.mk           |   2 +-
 arch/arm/cpu/armv7/config.mk                  |   2 +-
 arch/arm/cpu/armv7/omap3/config.mk            |   2 +-
 arch/arm/cpu/armv7/omap4/config.mk            |   2 +-
 arch/arm/cpu/armv7/omap5/config.mk            |   2 +-
 arch/arm/cpu/armv7/socfpga/config.mk          |   2 +-
 arch/blackfin/config.mk                       |  10 +-
 arch/blackfin/cpu/Makefile                    |   8 +-
 arch/mips/cpu/mips32/config.mk                |   2 +-
 arch/mips/cpu/mips64/config.mk                |   2 +-
 arch/mips/cpu/xburst/config.mk                |   2 +-
 arch/nds32/config.mk                          |   2 +-
 arch/powerpc/lib/Makefile                     |   4 +-
 arch/sandbox/cpu/Makefile                     |   4 +-
 arch/sparc/config.mk                          |   3 +-
 arch/x86/lib/Makefile                         |   2 +-
 board/ait/cam_enc_4xx/config.mk               |   2 +-
 board/avionic-design/medcom-wide/Makefile     |   2 +-
 board/avionic-design/plutux/Makefile          |   2 +-
 board/avionic-design/tec/Makefile             |   2 +-
 board/compal/paz00/Makefile                   |   2 +-
 board/compulab/trimslice/Makefile             |   2 +-
 board/cray/L1/Makefile                        |   8 +-
 board/h2200/Makefile                          |   2 +-
 board/matrix_vision/mvblm7/Makefile           |   4 +-
 board/matrix_vision/mvsmr/Makefile            |   2 +-
 board/nvidia/common/Makefile                  |   2 +-
 board/pcs440ep/config.mk                      |   2 +-
 board/samsung/origen/Makefile                 |   2 +-
 common/Makefile                               |   9 +-
 config.mk                                     |  42 +-
 doc/DocBook/Makefile                          |   2 -
 drivers/bios_emulator/Makefile                |   2 +-
 dts/Makefile                                  |   6 +-
 examples/api/Makefile                         |  16 +-
 examples/standalone/Makefile                  |  14 +-
 fs/ubifs/Makefile                             |   2 +-
 lib/Makefile                                  |   2 +-
 mkconfig                                      |   2 +-
 nand_spl/board/amcc/acadia/Makefile           |  30 +-
 nand_spl/board/amcc/bamboo/Makefile           |  30 +-
 nand_spl/board/amcc/canyonlands/Makefile      |  30 +-
 nand_spl/board/amcc/kilauea/Makefile          |  28 +-
 nand_spl/board/amcc/sequoia/Makefile          |  32 +-
 nand_spl/board/freescale/mpc8315erdb/Makefile |  30 +-
 nand_spl/board/freescale/mpc8536ds/Makefile   |  42 +-
 nand_spl/board/freescale/mpc8569mds/Makefile  |  42 +-
 nand_spl/board/freescale/mpc8572ds/Makefile   |  42 +-
 nand_spl/board/freescale/p1023rds/Makefile    |  42 +-
 nand_spl/board/freescale/p1_p2_rdb/Makefile   |  42 +-
 nand_spl/board/sheldon/simpc8313/Makefile     |  30 +-
 post/lib_powerpc/fpu/Makefile                 |   2 +-
 rules.mk                                      |  19 +-
 scripts/Kbuild.include                        |   4 +-
 scripts/Makefile.build                        |  57 ++-
 scripts/Makefile.host.tmp                     |  18 +-
 spl/Makefile                                  |  49 ++-
 tools/Makefile                                |  18 +-
 63 files changed, 604 insertions(+), 736 deletions(-)

Patch

diff --git a/MAKEALL b/MAKEALL
index a74f0fc..3c216d5 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -658,8 +658,6 @@  build_target() {
 		output_dir="${OUTPUT_PREFIX}"
 	fi
 
-	export BUILD_DIR="${output_dir}"
-
 	target_arch=$(get_target_arch ${target})
 	eval cross_toolchain=\$CROSS_COMPILE_`echo $target_arch | tr '[:lower:]' '[:upper:]'`
 	if [ "${cross_toolchain}" ] ; then
@@ -670,6 +668,10 @@  build_target() {
 	    MAKE=make
 	fi
 
+	if [  "${output_dir}" != "." ] ; then
+		MAKE="${MAKE} O=${output_dir}"
+	fi
+
 	${MAKE} distclean >/dev/null
 	${MAKE} -s ${target}_config
 
diff --git a/Makefile b/Makefile
index 18bcbab..3a6f63c 100644
--- a/Makefile
+++ b/Makefile
@@ -14,8 +14,8 @@  U_BOOT_VERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 else
 U_BOOT_VERSION = $(VERSION).$(PATCHLEVEL)$(EXTRAVERSION)
 endif
-TIMESTAMP_FILE = $(obj)include/generated/timestamp_autogenerated.h
-VERSION_FILE = $(obj)include/generated/version_autogenerated.h
+TIMESTAMP_FILE = include/generated/timestamp_autogenerated.h
+VERSION_FILE = include/generated/version_autogenerated.h
 
 HOSTARCH := $(shell uname -m | \
 	sed -e s/i.86/x86/ \
@@ -43,32 +43,82 @@  else
 XECHO = :
 endif
 
-#########################################################################
-#
-# U-boot build supports generating object files in a separate external
-# directory. Two use cases are supported:
-#
-# 1) Add O= to the make command line
-# 'make O=/tmp/build all'
-#
-# 2) Set environment variable BUILD_DIR to point to the desired location
-# 'export BUILD_DIR=/tmp/build'
-# 'make'
-#
-# The second approach can also be used with a MAKEALL script
-# 'export BUILD_DIR=/tmp/build'
-# './MAKEALL'
+# kbuild supports saving output files in a separate directory.
+# To locate output files in a separate directory two syntaxes are supported.
+# In both cases the working directory must be the root of the kernel src.
+# 1) O=
+# Use "make O=dir/to/store/output/files/"
 #
-# Command line 'O=' setting overrides BUILD_DIR environment variable.
-#
-# When none of the above methods is used the local build is performed and
-# the object files are placed in the source directory.
+# 2) Set KBUILD_OUTPUT
+# Set the environment variable KBUILD_OUTPUT to point to the directory
+# where the output files shall be placed.
+# export KBUILD_OUTPUT=dir/to/store/output/files/
+# make
 #
+# The O= assignment takes precedence over the KBUILD_OUTPUT environment
+# variable.
+
+
+# KBUILD_SRC is set on invocation of make in OBJ directory
+# KBUILD_SRC is not intended to be used by the regular user (for now)
+ifeq ($(KBUILD_SRC),)
 
+# OK, Make called in directory where kernel src resides
+# Do we want to locate output files in a separate directory?
 ifeq ("$(origin O)", "command line")
-BUILD_DIR := $(O)
+  KBUILD_OUTPUT := $(O)
+endif
+
+ifeq ("$(origin W)", "command line")
+  export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
 endif
 
+# That's our default target when none is given on the command line
+PHONY := _all
+_all:
+
+# Cancel implicit rules on top Makefile
+$(CURDIR)/Makefile Makefile: ;
+
+ifneq ($(KBUILD_OUTPUT),)
+# Invoke a second make in the output directory, passing relevant variables
+# check that the output directory actually exists
+saved-output := $(KBUILD_OUTPUT)
+KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
+$(if $(KBUILD_OUTPUT),, \
+     $(error output directory "$(saved-output)" does not exist))
+
+PHONY += $(MAKECMDGOALS) sub-make
+
+$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
+	@:
+
+sub-make: FORCE
+	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
+	KBUILD_SRC=$(CURDIR) \
+	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
+	$(filter-out _all sub-make,$(MAKECMDGOALS))
+
+# Leave processing to above invocation of make
+skip-makefile := 1
+endif # ifneq ($(KBUILD_OUTPUT),)
+endif # ifeq ($(KBUILD_SRC),)
+
+# We process the rest of the Makefile if this is the final invocation of make
+ifeq ($(skip-makefile),)
+
+PHONY += all
+_all: all
+
+srctree		:= $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
+objtree		:= $(CURDIR)
+src		:= $(srctree)
+obj		:= $(objtree)
+
+VPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
+
+export srctree objtree VPATH
+
 # Call a source code checker (by default, "sparse") as part of the
 # C compilation.
 #
@@ -87,41 +137,16 @@  ifndef CHECKSRC
 endif
 export CHECKSRC
 
-ifneq ($(BUILD_DIR),)
-saved-output := $(BUILD_DIR)
-
-# Attempt to create a output directory.
-$(shell [ -d ${BUILD_DIR} ] || mkdir -p ${BUILD_DIR})
-
-# Verify if it was successful.
-BUILD_DIR := $(shell cd $(BUILD_DIR) && /bin/pwd)
-$(if $(BUILD_DIR),,$(error output directory "$(saved-output)" does not exist))
-endif # ifneq ($(BUILD_DIR),)
-
-OBJTREE		:= $(if $(BUILD_DIR),$(BUILD_DIR),$(CURDIR))
+OBJTREE		:= $(objtree)
 SPLTREE		:= $(OBJTREE)/spl
 TPLTREE		:= $(OBJTREE)/tpl
-SRCTREE		:= $(CURDIR)
-srctree		:= $(SRCTREE)
+SRCTREE		:= $(srctree)
 TOPDIR		:= $(SRCTREE)
-LNDIR		:= $(OBJTREE)
-export	TOPDIR SRCTREE srctree OBJTREE SPLTREE TPLTREE
+export	TOPDIR SRCTREE OBJTREE SPLTREE TPLTREE
 
 MKCONFIG	:= $(SRCTREE)/mkconfig
 export MKCONFIG
 
-# $(obj) and (src) are defined in config.mk but here in main Makefile
-# we also need them before config.mk is included which is the case for
-# some targets like unconfig, clean, clobber, distclean, etc.
-ifneq ($(OBJTREE),$(SRCTREE))
-obj := $(OBJTREE)/
-src := $(SRCTREE)/
-else
-obj :=
-src :=
-endif
-export obj src
-
 # Make sure CDPATH settings don't interfere
 unexport CDPATH
 
@@ -136,14 +161,14 @@  SUBDIRS = $(SUBDIR_TOOLS)
 
 .PHONY : $(SUBDIRS) $(VERSION_FILE) $(TIMESTAMP_FILE)
 
-ifeq ($(obj)include/config.mk,$(wildcard $(obj)include/config.mk))
+ifeq (include/config.mk,$(wildcard include/config.mk))
 
 # Include autoconf.mk before config.mk so that the config options are available
 # to all top level build files.  We need the dummy all: target to prevent the
 # dependency target in autoconf.mk.dep from being the default.
 all:
-sinclude $(obj)include/autoconf.mk.dep
-sinclude $(obj)include/autoconf.mk
+sinclude include/autoconf.mk.dep
+sinclude include/autoconf.mk
 
 SUBDIR_EXAMPLES-y := examples/standalone
 SUBDIR_EXAMPLES-$(CONFIG_API) += examples/api
@@ -152,7 +177,7 @@  SUBDIRS += $(SUBDIR_EXAMPLES-y)
 endif
 
 # load ARCH, BOARD, and CPU configuration
-include $(obj)include/config.mk
+include include/config.mk
 export	ARCH CPU BOARD VENDOR SOC
 
 # set default to nothing for native builds
@@ -197,6 +222,9 @@  HOSTCFLAGS  += $(call os_x_before, 10, 4, "-traditional-cpp")
 HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
 endif
 
+# Look for make include files relative to root of kernel src
+MAKEFLAGS += --include-dir=$(srctree)
+
 # We need some generic definitions (do not try to remake the file).
 $(srctree)/scripts/Kbuild.include: ;
 include $(srctree)/scripts/Kbuild.include
@@ -287,7 +315,7 @@  endif
 
 export CONFIG_SYS_TEXT_BASE
 
-LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
+LDFLAGS_u-boot += -T u-boot.lds $(LDFLAGS_FINAL)
 ifneq ($(CONFIG_SYS_TEXT_BASE),)
 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
 endif
@@ -350,9 +378,9 @@  head-y := $(CPUDIR)/start.o
 head-$(CONFIG_4xx) += arch/powerpc/cpu/ppc4xx/resetvec.o
 head-$(CONFIG_MPC85xx) += arch/powerpc/cpu/mpc85xx/resetvec.o
 
-OBJS := $(addprefix $(obj),$(head-y))
+OBJS := $(head-y)
 
-HAVE_VENDOR_COMMON_LIB = $(if $(wildcard board/$(VENDOR)/common/Makefile),y,n)
+HAVE_VENDOR_COMMON_LIB = $(if $(wildcard $(srctree)/board/$(VENDOR)/common/Makefile),y,n)
 
 LIBS-y += lib/
 LIBS-$(HAVE_VENDOR_COMMON_LIB) += board/$(VENDOR)/common/
@@ -412,7 +440,7 @@  LIBS-$(CONFIG_PPC) += arch/powerpc/cpu/
 LIBS-y += board/$(BOARDDIR)/
 
 LIBS-y := $(patsubst %/, %/built-in.o, $(LIBS-y))
-LIBS := $(addprefix $(obj),$(sort $(LIBS-y)))
+LIBS := $(sort $(LIBS-y))
 .PHONY : $(LIBS)
 
 # Add GCC lib
@@ -437,9 +465,6 @@  LDPPFLAGS += \
 	$(shell $(LD) --version | \
 	  sed -ne 's/GNU ld version \([0-9][0-9]*\)\.\([0-9][0-9]*\).*/-DLD_MAJOR=\1 -DLD_MINOR=\2/p')
 
-__OBJS := $(subst $(obj),,$(OBJS))
-__LIBS := $(subst $(obj),,$(LIBS))
-
 #########################################################################
 #########################################################################
 
@@ -459,56 +484,56 @@  BOARD_SIZE_CHECK =
 endif
 
 # Always append ALL so that arch config.mk's can add custom ones
-ALL-y += $(obj)u-boot.srec $(obj)u-boot.bin $(obj)System.map
-
-ALL-$(CONFIG_NAND_U_BOOT) += $(obj)u-boot-nand.bin
-ALL-$(CONFIG_ONENAND_U_BOOT) += $(obj)u-boot-onenand.bin
-ALL-$(CONFIG_RAMBOOT_PBL) += $(obj)u-boot.pbl
-ALL-$(CONFIG_SPL) += $(obj)spl/u-boot-spl.bin
-ALL-$(CONFIG_SPL_FRAMEWORK) += $(obj)u-boot.img
-ALL-$(CONFIG_TPL) += $(obj)tpl/u-boot-tpl.bin
-ALL-$(CONFIG_OF_SEPARATE) += $(obj)u-boot.dtb $(obj)u-boot-dtb.bin
+ALL-y += u-boot.srec u-boot.bin System.map
+
+ALL-$(CONFIG_NAND_U_BOOT) += u-boot-nand.bin
+ALL-$(CONFIG_ONENAND_U_BOOT) += u-boot-onenand.bin
+ALL-$(CONFIG_RAMBOOT_PBL) += u-boot.pbl
+ALL-$(CONFIG_SPL) += spl/u-boot-spl.bin
+ALL-$(CONFIG_SPL_FRAMEWORK) += u-boot.img
+ALL-$(CONFIG_TPL) += tpl/u-boot-tpl.bin
+ALL-$(CONFIG_OF_SEPARATE) += u-boot.dtb u-boot-dtb.bin
 ifneq ($(CONFIG_SPL_TARGET),)
-ALL-$(CONFIG_SPL) += $(obj)$(CONFIG_SPL_TARGET:"%"=%)
+ALL-$(CONFIG_SPL) += $(CONFIG_SPL_TARGET:"%"=%)
 endif
 
 # enable combined SPL/u-boot/dtb rules for tegra
 ifneq ($(CONFIG_TEGRA),)
 ifeq ($(CONFIG_OF_SEPARATE),y)
-ALL-y += $(obj)u-boot-dtb-tegra.bin
+ALL-y += u-boot-dtb-tegra.bin
 else
-ALL-y += $(obj)u-boot-nodtb-tegra.bin
+ALL-y += u-boot-nodtb-tegra.bin
 endif
 endif
 
 all:		$(ALL-y) $(SUBDIR_EXAMPLES-y)
 
-$(obj)u-boot.dtb:	checkdtc $(obj)u-boot
-		$(MAKE) $(build) dts binary
-		mv $(obj)dts/dt.dtb $@
+u-boot.dtb:	checkdtc u-boot
+		$(MAKE) $(build)=dts binary
+		mv dts/dt.dtb $@
 
-$(obj)u-boot-dtb.bin:	$(obj)u-boot.bin $(obj)u-boot.dtb
+u-boot-dtb.bin:	u-boot.bin u-boot.dtb
 		cat $^ >$@
 
-$(obj)u-boot.hex:	$(obj)u-boot
+u-boot.hex:	u-boot
 		$(OBJCOPY) ${OBJCFLAGS} -O ihex $< $@
 
-$(obj)u-boot.srec:	$(obj)u-boot
+u-boot.srec:	u-boot
 		$(OBJCOPY) ${OBJCFLAGS} -O srec $< $@
 
-$(obj)u-boot.bin:	$(obj)u-boot
+u-boot.bin:	u-boot
 		$(OBJCOPY) ${OBJCFLAGS} -O binary $< $@
 		$(BOARD_SIZE_CHECK)
 
-$(obj)u-boot.ldr:	$(obj)u-boot
+u-boot.ldr:	u-boot
 		$(CREATE_LDR_ENV)
 		$(LDR) -T $(CONFIG_BFIN_CPU) -c $@ $< $(LDR_FLAGS)
 		$(BOARD_SIZE_CHECK)
 
-$(obj)u-boot.ldr.hex:	$(obj)u-boot.ldr
+u-boot.ldr.hex:	u-boot.ldr
 		$(OBJCOPY) ${OBJCFLAGS} -O ihex $< $@ -I binary
 
-$(obj)u-boot.ldr.srec:	$(obj)u-boot.ldr
+u-boot.ldr.srec:	u-boot.ldr
 		$(OBJCOPY) ${OBJCFLAGS} -O srec $< $@ -I binary
 
 #
@@ -519,79 +544,78 @@  ifndef CONFIG_SYS_UBOOT_START
 CONFIG_SYS_UBOOT_START := 0
 endif
 
-$(obj)u-boot.img:	$(obj)u-boot.bin
-		$(obj)tools/mkimage -A $(ARCH) -T firmware -C none \
+u-boot.img:	u-boot.bin
+		tools/mkimage -A $(ARCH) -T firmware -C none \
 		-O u-boot -a $(CONFIG_SYS_TEXT_BASE) \
 		-e $(CONFIG_SYS_UBOOT_START) \
 		-n $(shell sed -n -e 's/.*U_BOOT_VERSION//p' $(VERSION_FILE) | \
 			sed -e 's/"[	 ]*$$/ for $(BOARD) board"/') \
 		-d $< $@
 
-$(obj)u-boot.imx: $(obj)u-boot.bin depend
-		$(MAKE) $(build) $(SRCTREE)/arch/arm/imx-common $(OBJTREE)/u-boot.imx
+u-boot.imx: u-boot.bin depend
+		$(MAKE) $(build)=arch/arm/imx-common $(objtree)/u-boot.imx
 
-$(obj)u-boot.kwb:       $(obj)u-boot.bin
-		$(obj)tools/mkimage -n $(CONFIG_SYS_KWD_CONFIG) -T kwbimage \
+u-boot.kwb:       u-boot.bin
+		tools/mkimage -n $(CONFIG_SYS_KWD_CONFIG) -T kwbimage \
 		-a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) -d $< $@
 
-$(obj)u-boot.pbl:	$(obj)u-boot.bin
-		$(obj)tools/mkimage -n $(CONFIG_PBLRCW_CONFIG) \
+u-boot.pbl:	u-boot.bin
+		tools/mkimage -n $(CONFIG_PBLRCW_CONFIG) \
 		-R $(CONFIG_PBLPBI_CONFIG) -T pblimage \
 		-d $< $@
 
-$(obj)u-boot.sha1:	$(obj)u-boot.bin
-		$(obj)tools/ubsha1 $(obj)u-boot.bin
+u-boot.sha1:	u-boot.bin
+		tools/ubsha1 u-boot.bin
 
-$(obj)u-boot.dis:	$(obj)u-boot
+u-boot.dis:	u-boot
 		$(OBJDUMP) -d $< > $@
 
 # $@ is output, $(1) and $(2) are inputs, $(3) is padded intermediate,
 # $(4) is pad-to
 SPL_PAD_APPEND = \
 		$(OBJCOPY) ${OBJCFLAGS} --pad-to=$(4) -I binary -O binary \
-		$(1) $(obj)$(3); \
-		cat $(obj)$(3) $(2) > $@; \
-		rm $(obj)$(3)
+		$(1) $(3); \
+		cat $(3) $(2) > $@; \
+		rm $(3)
 
 ifdef CONFIG_TPL
-SPL_PAYLOAD := $(obj)tpl/u-boot-with-tpl.bin
+SPL_PAYLOAD := tpl/u-boot-with-tpl.bin
 else
-SPL_PAYLOAD := $(obj)u-boot.bin
+SPL_PAYLOAD := u-boot.bin
 endif
 
-$(obj)u-boot-with-spl.bin: $(obj)spl/u-boot-spl.bin $(SPL_PAYLOAD)
+u-boot-with-spl.bin: spl/u-boot-spl.bin $(SPL_PAYLOAD)
 		$(call SPL_PAD_APPEND,$<,$(SPL_PAYLOAD),spl/u-boot-spl-pad.bin,$(CONFIG_SPL_PAD_TO))
 
-$(obj)tpl/u-boot-with-tpl.bin: $(obj)tpl/u-boot-tpl.bin $(obj)u-boot.bin
-		$(call SPL_PAD_APPEND,$<,$(obj)u-boot.bin,tpl/u-boot-tpl-pad.bin,$(CONFIG_TPL_PAD_TO))
+tpl/u-boot-with-tpl.bin: tpl/u-boot-tpl.bin u-boot.bin
+		$(call SPL_PAD_APPEND,$<,u-boot.bin,tpl/u-boot-tpl-pad.bin,$(CONFIG_TPL_PAD_TO))
 
-$(obj)u-boot-with-spl.imx: $(obj)spl/u-boot-spl.bin $(obj)u-boot.bin
-		$(MAKE) $(build) $(SRCTREE)/arch/arm/imx-common \
+u-boot-with-spl.imx: spl/u-boot-spl.bin u-boot.bin
+		$(MAKE) $(build)=arch/arm/imx-common \
 			$(OBJTREE)/u-boot-with-spl.imx
 
-$(obj)u-boot-with-nand-spl.imx: $(obj)spl/u-boot-spl.bin $(obj)u-boot.bin
-		$(MAKE) $(build) $(SRCTREE)/arch/arm/imx-common \
+u-boot-with-nand-spl.imx: spl/u-boot-spl.bin u-boot.bin
+		$(MAKE) $(build)=arch/arm/imx-common \
 			$(OBJTREE)/u-boot-with-nand-spl.imx
 
-$(obj)u-boot.ubl:       $(obj)u-boot-with-spl.bin
-		$(obj)tools/mkimage -n $(UBL_CONFIG) -T ublimage \
-		-e $(CONFIG_SYS_TEXT_BASE) -d $< $(obj)u-boot.ubl
+u-boot.ubl:       u-boot-with-spl.bin
+		tools/mkimage -n $(UBL_CONFIG) -T ublimage \
+		-e $(CONFIG_SYS_TEXT_BASE) -d $< u-boot.ubl
 
-$(obj)u-boot.ais:       $(obj)spl/u-boot-spl.bin $(obj)u-boot.img
-		$(obj)tools/mkimage -s -n $(if $(CONFIG_AIS_CONFIG_FILE),$(CONFIG_AIS_CONFIG_FILE),"/dev/null") \
+u-boot.ais:       spl/u-boot-spl.bin u-boot.img
+		tools/mkimage -s -n $(if $(CONFIG_AIS_CONFIG_FILE),$(srctree)/$(CONFIG_AIS_CONFIG_FILE:"%"=%),"/dev/null") \
 			-T aisimage \
 			-e $(CONFIG_SPL_TEXT_BASE) \
-			-d $(obj)spl/u-boot-spl.bin \
-			$(obj)spl/u-boot-spl.ais
+			-d spl/u-boot-spl.bin \
+			spl/u-boot-spl.ais
 		$(OBJCOPY) ${OBJCFLAGS} -I binary \
 			--pad-to=$(CONFIG_SPL_MAX_SIZE) -O binary \
-			$(obj)spl/u-boot-spl.ais $(obj)spl/u-boot-spl-pad.ais
-		cat $(obj)spl/u-boot-spl-pad.ais $(obj)u-boot.img > \
-			$(obj)u-boot.ais
+			spl/u-boot-spl.ais spl/u-boot-spl-pad.ais
+		cat spl/u-boot-spl-pad.ais u-boot.img > u-boot.ais
 
 
-$(obj)u-boot.sb:       $(obj)u-boot.bin $(obj)spl/u-boot-spl.bin
-		$(MAKE) $(build) $(SRCTREE)/$(CPUDIR)/$(SOC)/ $(OBJTREE)/u-boot.sb
+u-boot.sb:       u-boot.bin spl/u-boot-spl.bin
+		$(MAKE) $(build)=$(CPUDIR)/$(SOC)/ $(OBJTREE)/u-boot.sb
 
 # On x600 (SPEAr600) U-Boot is appended to U-Boot SPL.
 # Both images are created using mkimage (crc etc), so that the ROM
@@ -599,112 +623,111 @@  $(obj)u-boot.sb:       $(obj)u-boot.bin $(obj)spl/u-boot-spl.bin
 # SPL image (with mkimage header) and not the binary. Otherwise the resulting image
 # which is loaded/copied by the ROM bootloader to SRAM doesn't fit.
 # The resulting image containing both U-Boot images is called u-boot.spr
-$(obj)u-boot.spr:	$(obj)u-boot.img $(obj)spl/u-boot-spl.bin
-		$(obj)tools/mkimage -A $(ARCH) -T firmware -C none \
+u-boot.spr:	u-boot.img spl/u-boot-spl.bin
+		tools/mkimage -A $(ARCH) -T firmware -C none \
 		-a $(CONFIG_SPL_TEXT_BASE) -e $(CONFIG_SPL_TEXT_BASE) -n XLOADER \
-		-d $(obj)spl/u-boot-spl.bin $@
+		-d spl/u-boot-spl.bin $@
 		$(OBJCOPY) -I binary -O binary \
 			--pad-to=$(CONFIG_SPL_PAD_TO) --gap-fill=0xff $@
-		cat $(obj)u-boot.img >> $@
+		cat u-boot.img >> $@
 
 ifneq ($(CONFIG_TEGRA),)
-$(obj)u-boot-nodtb-tegra.bin: $(obj)spl/u-boot-spl.bin $(obj)u-boot.bin
-		$(OBJCOPY) ${OBJCFLAGS} --pad-to=$(CONFIG_SYS_TEXT_BASE) -O binary $(obj)spl/u-boot-spl $(obj)spl/u-boot-spl-pad.bin
-		cat $(obj)spl/u-boot-spl-pad.bin $(obj)u-boot.bin > $@
-		rm $(obj)spl/u-boot-spl-pad.bin
+u-boot-nodtb-tegra.bin: spl/u-boot-spl.bin u-boot.bin
+		$(OBJCOPY) ${OBJCFLAGS} --pad-to=$(CONFIG_SYS_TEXT_BASE) -O binary spl/u-boot-spl spl/u-boot-spl-pad.bin
+		cat spl/u-boot-spl-pad.bin u-boot.bin > $@
+		rm spl/u-boot-spl-pad.bin
 
 ifeq ($(CONFIG_OF_SEPARATE),y)
-$(obj)u-boot-dtb-tegra.bin: $(obj)u-boot-nodtb-tegra.bin $(obj)u-boot.dtb
-		cat $(obj)u-boot-nodtb-tegra.bin $(obj)u-boot.dtb > $@
+u-boot-dtb-tegra.bin: u-boot-nodtb-tegra.bin u-boot.dtb
+		cat u-boot-nodtb-tegra.bin u-boot.dtb > $@
 endif
 endif
 
-$(obj)u-boot-img.bin: $(obj)spl/u-boot-spl.bin $(obj)u-boot.img
-		cat $(obj)spl/u-boot-spl.bin $(obj)u-boot.img > $@
+u-boot-img.bin: spl/u-boot-spl.bin u-boot.img
+		cat spl/u-boot-spl.bin u-boot.img > $@
 
 # PPC4xx needs the SPL at the end of the image, since the reset vector
 # is located at 0xfffffffc. So we can't use the "u-boot-img.bin" target
 # and need to introduce a new build target with the full blown U-Boot
 # at the start padded up to the start of the SPL image. And then concat
 # the SPL image to the end.
-$(obj)u-boot-img-spl-at-end.bin: $(obj)spl/u-boot-spl.bin $(obj)u-boot.img
+u-boot-img-spl-at-end.bin: spl/u-boot-spl.bin u-boot.img
 		$(OBJCOPY) -I binary -O binary --pad-to=$(CONFIG_UBOOT_PAD_TO) \
-			 --gap-fill=0xff $(obj)u-boot.img $@
-		cat $(obj)spl/u-boot-spl.bin >> $@
+			 --gap-fill=0xff u-boot.img $@
+		cat spl/u-boot-spl.bin >> $@
 
 ifeq ($(CONFIG_SANDBOX),y)
 GEN_UBOOT = \
-		cd $(LNDIR) && $(CC) $(SYMS) -T $(obj)u-boot.lds \
-			-Wl,--start-group $(__LIBS) -Wl,--end-group \
+		$(CC) $(SYMS) -T u-boot.lds \
+			-Wl,--start-group $(LIBS) -Wl,--end-group \
 			$(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot.map -o u-boot
 else
 GEN_UBOOT = \
-		cd $(LNDIR) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) \
-			$(__OBJS) \
-			--start-group $(__LIBS) --end-group $(PLATFORM_LIBS) \
+		$(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) \
+			$(OBJS) \
+			--start-group $(LIBS) --end-group $(PLATFORM_LIBS) \
 			-Map u-boot.map -o u-boot
 endif
 
-$(obj)u-boot:	depend \
-		$(SUBDIR_TOOLS) $(OBJS) $(LIBS) $(obj)u-boot.lds
+u-boot:	depend $(SUBDIR_TOOLS) $(OBJS) $(LIBS) u-boot.lds
 		$(GEN_UBOOT)
 ifeq ($(CONFIG_KALLSYMS),y)
-		smap=`$(call SYSTEM_MAP,$(obj)u-boot) | \
+		smap=`$(call SYSTEM_MAP,u-boot) | \
 			awk '$$2 ~ /[tTwW]/ {printf $$1 $$3 "\\\\000"}'` ; \
 		$(CC) $(CFLAGS) -DSYSTEM_MAP="\"$${smap}\"" \
-			-c common/system_map.c -o $(obj)common/system_map.o
-		$(GEN_UBOOT) $(obj)common/system_map.o
+			-c $(srctree)/common/system_map.c -o common/system_map.o
+		$(GEN_UBOOT) common/system_map.o
 endif
 
 $(OBJS):
 	@:
 
 $(LIBS):	depend $(SUBDIR_TOOLS)
-		$(MAKE) $(build) $(dir $(subst $(obj),,$@))
+		$(MAKE) $(build)=$(patsubst %/,%,$(dir $@))
 
 $(SUBDIRS):	depend
-		$(MAKE) $(build) $@ all
+		$(MAKE) $(build)=$@ all
 
-$(SUBDIR_EXAMPLES-y): $(obj)u-boot
+$(SUBDIR_EXAMPLES-y): u-boot
 
-$(obj)u-boot.lds: $(LDSCRIPT) depend
+u-boot.lds: $(LDSCRIPT) depend
 		$(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$< >$@
 
 nand_spl:	$(TIMESTAMP_FILE) $(VERSION_FILE) depend
-		$(MAKE) $(build) nand_spl/board/$(BOARDDIR) all
+		$(MAKE) $(build)=nand_spl/board/$(BOARDDIR) all
 
-$(obj)u-boot-nand.bin:	nand_spl $(obj)u-boot.bin
-		cat $(obj)nand_spl/u-boot-spl-16k.bin $(obj)u-boot.bin > $(obj)u-boot-nand.bin
+u-boot-nand.bin:	nand_spl u-boot.bin
+		cat nand_spl/u-boot-spl-16k.bin u-boot.bin > u-boot-nand.bin
 
-$(obj)spl/u-boot-spl.bin:	$(SUBDIR_TOOLS) depend
-		$(MAKE) -C spl all
+spl/u-boot-spl.bin:	$(SUBDIR_TOOLS) depend
+		$(MAKE) obj=spl -f $(srctree)/spl/Makefile all
 
-$(obj)tpl/u-boot-tpl.bin:	$(SUBDIR_TOOLS) depend
-		$(MAKE) -C spl all CONFIG_TPL_BUILD=y
+tpl/u-boot-tpl.bin:	$(SUBDIR_TOOLS) depend
+		$(MAKE) obj=tpl -f $(srctree)/spl/Makefile all CONFIG_TPL_BUILD=y
 
 # Explicitly make _depend in subdirs containing multiple targets to prevent
 # parallel sub-makes creating .depend files simultaneously.
 depend dep:	$(TIMESTAMP_FILE) $(VERSION_FILE) \
-		$(obj)include/spl-autoconf.mk \
-		$(obj)include/tpl-autoconf.mk \
-		$(obj)include/autoconf.mk \
-		$(obj)include/generated/generic-asm-offsets.h \
-		$(obj)include/generated/asm-offsets.h
+		include/spl-autoconf.mk \
+		include/tpl-autoconf.mk \
+		include/autoconf.mk \
+		include/generated/generic-asm-offsets.h \
+		include/generated/asm-offsets.h
 
 TAG_SUBDIRS = $(SUBDIRS)
-TAG_SUBDIRS += $(dir $(__LIBS))
+TAG_SUBDIRS += $(dir $(LIBS))
 TAG_SUBDIRS += include
 
 FIND := find
 FINDFLAGS := -L
 
 checkstack:
-		$(CROSS_COMPILE)objdump -d $(obj)u-boot \
-			`$(FIND) $(obj) -name u-boot-spl -print` | \
-			perl $(src)scripts/checkstack.pl $(ARCH)
+		$(CROSS_COMPILE)objdump -d u-boot \
+			`$(FIND) . -name u-boot-spl -print` | \
+			perl $(src)/scripts/checkstack.pl $(ARCH)
 
 tags ctags:
-		ctags -w -o $(obj)ctags `$(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) \
+		ctags -w -o ctags `$(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) \
 						-name '*.[chS]' -print`
 
 etags:
@@ -719,7 +742,7 @@  SYSTEM_MAP = \
 		$(NM) $1 | \
 		grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | \
 		LC_ALL=C sort
-$(obj)System.map:	$(obj)u-boot
+System.map:	u-boot
 		@$(call SYSTEM_MAP,$<) > $@
 
 checkthumb:
@@ -751,75 +774,75 @@  checkdtc:
 # This target actually generates 2 files; autoconf.mk and autoconf.mk.dep.
 # the dep file is only include in this top level makefile to determine when
 # to regenerate the autoconf.mk file.
-$(obj)include/autoconf.mk.dep: $(obj)include/config.h include/common.h
+include/autoconf.mk.dep: include/config.h include/common.h
 	@$(XECHO) Generating $@ ; \
 	: Generate the dependancies ; \
 	$(CC) -x c -DDO_DEPS_ONLY -M $(CFLAGS) $(CPPFLAGS) \
-		-MQ $(obj)include/autoconf.mk include/common.h > $@ || \
+		-MQ include/autoconf.mk $(srctree)/include/common.h > $@ || \
 		rm $@
 
-$(obj)include/autoconf.mk: $(obj)include/config.h
+include/autoconf.mk: include/config.h
 	@$(XECHO) Generating $@ ; \
 	: Extract the config macros ; \
-	$(CPP) $(CFLAGS) -DDO_DEPS_ONLY -dM include/common.h > $@.tmp && \
-		sed -n -f tools/scripts/define2mk.sed $@.tmp > $@; \
+	$(CPP) $(CFLAGS) -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && \
+		sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp > $@; \
 	rm $@.tmp
 
 # Auto-generate the spl-autoconf.mk file (which is included by all makefiles for SPL)
-$(obj)include/tpl-autoconf.mk: $(obj)include/config.h
+include/tpl-autoconf.mk: include/config.h
 	@$(XECHO) Generating $@ ; \
 	: Extract the config macros ; \
 	$(CPP) $(CFLAGS) -DCONFIG_TPL_BUILD  -DCONFIG_SPL_BUILD\
-			-DDO_DEPS_ONLY -dM include/common.h > $@.tmp && \
-		sed -n -f tools/scripts/define2mk.sed $@.tmp > $@; \
+			-DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && \
+		sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp > $@; \
 	rm $@.tmp
 
-$(obj)include/spl-autoconf.mk: $(obj)include/config.h
+include/spl-autoconf.mk: include/config.h
 	@$(XECHO) Generating $@ ; \
 	: Extract the config macros ; \
-	$(CPP) $(CFLAGS) -DCONFIG_SPL_BUILD -DDO_DEPS_ONLY -dM include/common.h > $@.tmp && \
-		sed -n -f tools/scripts/define2mk.sed $@.tmp > $@; \
+	$(CPP) $(CFLAGS) -DCONFIG_SPL_BUILD -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && \
+		sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp > $@; \
 	rm $@.tmp
 
-$(obj)include/generated/generic-asm-offsets.h: $(obj)lib/asm-offsets.s
+include/generated/generic-asm-offsets.h: lib/asm-offsets.s
 	@$(XECHO) Generating $@
-	tools/scripts/make-asm-offsets $(obj)lib/asm-offsets.s $@
+	$(srctree)/tools/scripts/make-asm-offsets lib/asm-offsets.s $@
 
-$(obj)lib/asm-offsets.s: $(obj)include/config.h $(src)lib/asm-offsets.c
-	@mkdir -p $(obj)lib
+lib/asm-offsets.s: include/config.h $(srctree)/lib/asm-offsets.c
+	@mkdir -p lib
 	$(CC) -DDO_DEPS_ONLY \
 		$(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \
-		-o $@ $(src)lib/asm-offsets.c -c -S
+		-o $@ $(srctree)/lib/asm-offsets.c -c -S
 
-$(obj)include/generated/asm-offsets.h: $(obj)$(CPUDIR)/$(SOC)/asm-offsets.s
+include/generated/asm-offsets.h: $(CPUDIR)/$(SOC)/asm-offsets.s
 	@$(XECHO) Generating $@
-	tools/scripts/make-asm-offsets $(obj)$(CPUDIR)/$(SOC)/asm-offsets.s $@
+	$(srctree)/tools/scripts/make-asm-offsets $(CPUDIR)/$(SOC)/asm-offsets.s $@
 
-$(obj)$(CPUDIR)/$(SOC)/asm-offsets.s: $(obj)include/config.h
-	@mkdir -p $(obj)$(CPUDIR)/$(SOC)
-	if [ -f $(src)$(CPUDIR)/$(SOC)/asm-offsets.c ];then \
+$(CPUDIR)/$(SOC)/asm-offsets.s:	include/config.h
+	@mkdir -p $(CPUDIR)/$(SOC)
+	if [ -f $(srctree)/$(CPUDIR)/$(SOC)/asm-offsets.c ];then \
 		$(CC) -DDO_DEPS_ONLY \
 		$(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \
-			-o $@ $(src)$(CPUDIR)/$(SOC)/asm-offsets.c -c -S; \
+			-o $@ $(srctree)/$(CPUDIR)/$(SOC)/asm-offsets.c -c -S; \
 	else \
 		touch $@; \
 	fi
 
 #########################################################################
 else	# !config.mk
-all $(obj)u-boot.hex $(obj)u-boot.srec $(obj)u-boot.bin \
-$(obj)u-boot.img $(obj)u-boot.dis $(obj)u-boot \
+all u-boot.hex u-boot.srec u-boot.bin \
+u-boot.img u-boot.dis u-boot \
 $(filter-out tools,$(SUBDIRS)) \
-depend dep tags ctags etags cscope $(obj)System.map:
+depend dep tags ctags etags cscope System.map:
 	@echo "System not configured - see README" >&2
 	@ exit 1
 
 tools: $(VERSION_FILE) $(TIMESTAMP_FILE)
-	$(MAKE) $(build) $@ all
+	$(MAKE) $(build)=$@ all
 endif	# config.mk
 
 # ARM relocations should all be R_ARM_RELATIVE.
-checkarmreloc: $(obj)u-boot
+checkarmreloc: u-boot
 	@if test "R_ARM_RELATIVE" != \
 		"`$(CROSS_COMPILE)readelf -r $< | cut -d ' ' -f 4 | grep R_ARM | sort -u`"; \
 		then echo "$< contains relocations other than \
@@ -846,15 +869,15 @@  $(TIMESTAMP_FILE):
 		@cmp -s $@ $@.tmp && rm -f $@.tmp || mv -f $@.tmp $@
 
 easylogo env gdb:
-	$(MAKE) $(build) tools/$@ MTD_VERSION=${MTD_VERSION}
+	$(MAKE) $(build)=tools/$@ MTD_VERSION=${MTD_VERSION}
 
 gdbtools: gdb
 
 xmldocs pdfdocs psdocs htmldocs mandocs: tools/kernel-doc/docproc
-	$(MAKE) U_BOOT_VERSION=$(U_BOOT_VERSION) -C doc/DocBook/ $@
+	$(MAKE) U_BOOT_VERSION=$(U_BOOT_VERSION) $(build)=doc/DocBook $@
 
 tools-all: easylogo env gdb $(VERSION_FILE) $(TIMESTAMP_FILE)
-	$(MAKE) $(build) tools HOST_TOOLS_ALL=y
+	$(MAKE) $(build)=tools HOST_TOOLS_ALL=y
 
 .PHONY : CHANGELOG
 CHANGELOG:
@@ -866,57 +889,52 @@  include/license.h: tools/bin2header COPYING
 #########################################################################
 
 unconfig:
-	@rm -f $(obj)include/config.h $(obj)include/config.mk \
-		$(obj)board/*/config.tmp $(obj)board/*/*/config.tmp \
-		$(obj)include/autoconf.mk $(obj)include/autoconf.mk.dep \
-		$(obj)include/spl-autoconf.mk \
-		$(obj)include/tpl-autoconf.mk
+	@rm -f include/config.h include/config.mk \
+		board/*/config.tmp board/*/*/config.tmp \
+		include/autoconf.mk include/autoconf.mk.dep \
+		include/spl-autoconf.mk \
+		include/tpl-autoconf.mk
 
 %_config::	unconfig
 	@$(MKCONFIG) -A $(@:_config=)
 
-sinclude $(obj).boards.depend
-$(obj).boards.depend:	boards.cfg
-	@awk '(NF && $$1 !~ /^#/) { print $$7 ": " $$7 "_config; $$(MAKE)" }' $< > $@
-
-#########################################################################
 #########################################################################
 
 clean:
-	@rm -f $(obj)examples/standalone/atmel_df_pow2			  \
-	       $(obj)examples/standalone/hello_world			  \
-	       $(obj)examples/standalone/interrupt			  \
-	       $(obj)examples/standalone/mem_to_mem_idma2intr		  \
-	       $(obj)examples/standalone/sched				  \
-	       $(addprefix $(obj)examples/standalone/, smc91111_eeprom smc911x_eeprom) \
-	       $(obj)examples/standalone/test_burst			  \
-	       $(obj)examples/standalone/timer
-	@rm -f $(addprefix $(obj)examples/api/, demo demo.bin)
-	@rm -f $(obj)tools/bmp_logo	   $(obj)tools/easylogo/easylogo  \
-	       $(obj)tools/env/fw_printenv				  \
-	       $(obj)tools/envcrc					  \
-	       $(addprefix $(obj)tools/gdb/, gdbcont gdbsend)		  \
-	       $(obj)tools/gen_eth_addr    $(obj)tools/img2srec		  \
-	       $(obj)tools/dumpimage					  \
-	       $(addprefix $(obj)tools/, mkenvimage mkimage)		  \
-	       $(obj)tools/mpc86x_clk					  \
-	       $(addprefix $(obj)tools/, mk$(BOARD)spl mkexynosspl)	  \
-	       $(obj)tools/mxsboot					  \
-	       $(obj)tools/ncb		   $(obj)tools/ubsha1		  \
-	       $(obj)tools/kernel-doc/docproc				  \
-	       $(obj)tools/proftool
-	@rm -f $(addprefix $(obj)board/cray/L1/, bootscript.c bootscript.image) \
-	       $(obj)board/matrix_vision/*/bootscript.img		  \
-	       $(obj)spl/board/samsung/$(BOARD)/tools/mk$(BOARD)spl	  \
-	       $(obj)u-boot.lds						  \
-	       $(addprefix $(obj)arch/blackfin/cpu/, init.lds init.elf)
-	@rm -f $(obj)include/bmp_logo.h
-	@rm -f $(obj)include/bmp_logo_data.h
-	@rm -f $(obj)lib/asm-offsets.s
-	@rm -f $(obj)include/generated/asm-offsets.h
-	@rm -f $(obj)$(CPUDIR)/$(SOC)/asm-offsets.s
+	@rm -f examples/standalone/atmel_df_pow2			  \
+	       examples/standalone/hello_world				  \
+	       examples/standalone/interrupt				  \
+	       examples/standalone/mem_to_mem_idma2intr			  \
+	       examples/standalone/sched				  \
+	       $(addprefix examples/standalone/, smc91111_eeprom smc911x_eeprom) \
+	       examples/standalone/test_burst				  \
+	       examples/standalone/timer
+	@rm -f $(addprefix examples/api/, demo demo.bin)
+	@rm -f tools/bmp_logo	   tools/easylogo/easylogo		  \
+	       tools/env/fw_printenv					  \
+	       tools/envcrc						  \
+	       $(addprefix tools/gdb/, gdbcont gdbsend)			  \
+	       tools/gen_eth_addr    tools/img2srec			  \
+	       tools/dumpimage						  \
+	       $(addprefix tools/, mkenvimage mkimage)			  \
+	       tools/mpc86x_clk						  \
+	       $(addprefix tools/, mk$(BOARD)spl mkexynosspl)		  \
+	       tools/mxsboot						  \
+	       tools/ncb		   tools/ubsha1			  \
+	       tools/kernel-doc/docproc					  \
+	       tools/proftool
+	@rm -f $(addprefix board/cray/L1/, bootscript.c bootscript.image) \
+	       board/matrix_vision/*/bootscript.img			  \
+	       spl/board/samsung/$(BOARD)/tools/mk$(BOARD)spl		  \
+	       u-boot.lds						  \
+	       $(addprefix arch/blackfin/cpu/, init.lds init.elf)
+	@rm -f include/bmp_logo.h
+	@rm -f include/bmp_logo_data.h
+	@rm -f lib/asm-offsets.s
+	@rm -f include/generated/asm-offsets.h
+	@rm -f $(CPUDIR)/$(SOC)/asm-offsets.s
 	@rm -f $(TIMESTAMP_FILE) $(VERSION_FILE)
-	@$(MAKE) -s -C doc/DocBook/ cleandocs
+	@$(MAKE) -f $(srctree)/doc/DocBook/Makefile cleandocs
 	@find $(OBJTREE) -type f \
 		\( -name 'core' -o -name '*.bak' -o -name '*~' -o -name '*.su' \
 		-o -name '*.o'	-o -name '*.a' -o -name '*.exe' \
@@ -931,38 +949,38 @@  clobber:	tidy
 	@find $(OBJTREE) -type f \( -name '*.srec' \
 		-o -name '*.bin' -o -name u-boot.img \) \
 		-print0 | xargs -0 rm -f
-	@rm -f $(OBJS) $(obj)*.bak $(obj)ctags $(obj)etags $(obj)TAGS \
-		$(obj)cscope.* $(obj)*.*~
-	@rm -f $(obj)u-boot $(obj)u-boot.map $(obj)u-boot.hex $(ALL-y)
-	@rm -f $(obj)u-boot.kwb
-	@rm -f $(obj)u-boot.pbl
-	@rm -f $(obj)u-boot.imx
-	@rm -f $(obj)u-boot-with-spl.imx
-	@rm -f $(obj)u-boot-with-nand-spl.imx
-	@rm -f $(obj)u-boot.ubl
-	@rm -f $(obj)u-boot.ais
-	@rm -f $(obj)u-boot.dtb
-	@rm -f $(obj)u-boot.sb
-	@rm -f $(obj)u-boot.spr
-	@rm -f $(addprefix $(obj)nand_spl/, u-boot.lds u-boot.lst System.map)
-	@rm -f $(addprefix $(obj)nand_spl/, u-boot-nand_spl.lds u-boot-spl u-boot-spl.map)
-	@rm -f $(addprefix $(obj)spl/, u-boot-spl u-boot-spl.bin u-boot-spl.map)
-	@rm -f $(obj)spl/u-boot-spl.lds
-	@rm -f $(addprefix $(obj)tpl/, u-boot-tpl u-boot-tpl.bin u-boot-tpl.map)
-	@rm -f $(obj)tpl/u-boot-spl.lds
-	@rm -f $(obj)MLO MLO.byteswap
-	@rm -f $(obj)SPL
-	@rm -f $(obj)tools/xway-swap-bytes
-	@rm -fr $(obj)include/asm/proc $(obj)include/asm/arch $(obj)include/asm
-	@rm -fr $(obj)include/generated
-	@[ ! -d $(obj)nand_spl ] || find $(obj)nand_spl -name "*" -type l -print | xargs rm -f
-	@rm -f $(obj)dts/*.tmp
-	@rm -f $(addprefix $(obj)spl/, u-boot-spl.ais, u-boot-spl-pad.ais)
+	@rm -f $(OBJS) *.bak ctags etags TAGS \
+		cscope.* *.*~
+	@rm -f u-boot u-boot.map u-boot.hex $(ALL-y)
+	@rm -f u-boot.kwb
+	@rm -f u-boot.pbl
+	@rm -f u-boot.imx
+	@rm -f u-boot-with-spl.imx
+	@rm -f u-boot-with-nand-spl.imx
+	@rm -f u-boot.ubl
+	@rm -f u-boot.ais
+	@rm -f u-boot.dtb
+	@rm -f u-boot.sb
+	@rm -f u-boot.spr
+	@rm -f $(addprefix nand_spl/, u-boot.lds u-boot.lst System.map)
+	@rm -f $(addprefix nand_spl/, u-boot-nand_spl.lds u-boot-spl u-boot-spl.map)
+	@rm -f $(addprefix spl/, u-boot-spl u-boot-spl.bin u-boot-spl.map)
+	@rm -f spl/u-boot-spl.lds
+	@rm -f $(addprefix tpl/, u-boot-tpl u-boot-tpl.bin u-boot-tpl.map)
+	@rm -f tpl/u-boot-spl.lds
+	@rm -f MLO MLO.byteswap
+	@rm -f SPL
+	@rm -f tools/xway-swap-bytes
+	@rm -fr include/asm/proc include/asm/arch include/asm
+	@rm -fr include/generated
+	@[ ! -d nand_spl ] || find nand_spl -name "*" -type l -print | xargs rm -f
+	@rm -f dts/*.tmp
+	@rm -f $(addprefix spl/, u-boot-spl.ais, u-boot-spl-pad.ais)
 
 mrproper \
 distclean:	clobber unconfig
 ifneq ($(OBJTREE),$(SRCTREE))
-	rm -rf $(obj)*
+	rm -rf *
 endif
 
 backup:
@@ -970,3 +988,12 @@  backup:
 	gtar --force-local -zcvf `LC_ALL=C date "+$$F-%Y-%m-%d-%T.tar.gz"` $$F
 
 #########################################################################
+
+endif	# skip-makefile
+
+PHONY += FORCE
+FORCE:
+
+# Declare the contents of the .PHONY variable as phony.  We keep that
+# information in a variable so we can use it in if_changed and friends.
+.PHONY: $(PHONY)
diff --git a/arch/arm/cpu/arm1136/config.mk b/arch/arm/cpu/arm1136/config.mk
index f74228c..ab1fc4a 100644
--- a/arch/arm/cpu/arm1136/config.mk
+++ b/arch/arm/cpu/arm1136/config.mk
@@ -14,6 +14,6 @@  ifdef CONFIG_SPL_BUILD
 ALL-y	+= $(OBJTREE)/SPL
 endif
 else
-ALL-y	+= $(obj)u-boot.imx
+ALL-y	+= u-boot.imx
 endif
 endif
diff --git a/arch/arm/cpu/arm926ejs/config.mk b/arch/arm/cpu/arm926ejs/config.mk
index 4d9895f..f27ca15 100644
--- a/arch/arm/cpu/arm926ejs/config.mk
+++ b/arch/arm/cpu/arm926ejs/config.mk
@@ -13,6 +13,6 @@  ifdef CONFIG_SPL_BUILD
 ALL-y	+= $(OBJTREE)/SPL
 endif
 else
-ALL-y	+= $(obj)u-boot.imx
+ALL-y	+= u-boot.imx
 endif
 endif
diff --git a/arch/arm/cpu/arm926ejs/davinci/config.mk b/arch/arm/cpu/arm926ejs/davinci/config.mk
index d5c978b..69e9d5a 100644
--- a/arch/arm/cpu/arm926ejs/davinci/config.mk
+++ b/arch/arm/cpu/arm926ejs/davinci/config.mk
@@ -4,5 +4,5 @@ 
 # SPDX-License-Identifier:	GPL-2.0+
 #
 ifndef CONFIG_SPL_BUILD
-ALL-$(CONFIG_SPL_FRAMEWORK)	+= $(obj)u-boot.ais
+ALL-$(CONFIG_SPL_FRAMEWORK)	+= u-boot.ais
 endif
diff --git a/arch/arm/cpu/armv7/am33xx/config.mk b/arch/arm/cpu/armv7/am33xx/config.mk
index 8e3668f..1c06fb4 100644
--- a/arch/arm/cpu/armv7/am33xx/config.mk
+++ b/arch/arm/cpu/armv7/am33xx/config.mk
@@ -7,5 +7,5 @@  ifdef CONFIG_SPL_BUILD
 ALL-y	+= $(OBJTREE)/MLO
 ALL-$(CONFIG_SPL_SPI_SUPPORT) += $(OBJTREE)/MLO.byteswap
 else
-ALL-y	+= $(obj)u-boot.img
+ALL-y	+= u-boot.img
 endif
diff --git a/arch/arm/cpu/armv7/config.mk b/arch/arm/cpu/armv7/config.mk
index 38b7c40..d01f3d9 100644
--- a/arch/arm/cpu/armv7/config.mk
+++ b/arch/arm/cpu/armv7/config.mk
@@ -20,6 +20,6 @@  ifdef CONFIG_SPL_BUILD
 ALL-y	+= $(OBJTREE)/SPL
 endif
 else
-ALL-y	+= $(obj)u-boot.imx
+ALL-y	+= u-boot.imx
 endif
 endif
diff --git a/arch/arm/cpu/armv7/omap3/config.mk b/arch/arm/cpu/armv7/omap3/config.mk
index 1d6a57c..2a3d1c5 100644
--- a/arch/arm/cpu/armv7/omap3/config.mk
+++ b/arch/arm/cpu/armv7/omap3/config.mk
@@ -11,5 +11,5 @@ 
 ifdef CONFIG_SPL_BUILD
 ALL-y	+= $(OBJTREE)/MLO
 else
-ALL-y	+= $(obj)u-boot.img
+ALL-y	+= u-boot.img
 endif
diff --git a/arch/arm/cpu/armv7/omap4/config.mk b/arch/arm/cpu/armv7/omap4/config.mk
index 1d6a57c..2a3d1c5 100644
--- a/arch/arm/cpu/armv7/omap4/config.mk
+++ b/arch/arm/cpu/armv7/omap4/config.mk
@@ -11,5 +11,5 @@ 
 ifdef CONFIG_SPL_BUILD
 ALL-y	+= $(OBJTREE)/MLO
 else
-ALL-y	+= $(obj)u-boot.img
+ALL-y	+= u-boot.img
 endif
diff --git a/arch/arm/cpu/armv7/omap5/config.mk b/arch/arm/cpu/armv7/omap5/config.mk
index 2673af9..261b272 100644
--- a/arch/arm/cpu/armv7/omap5/config.mk
+++ b/arch/arm/cpu/armv7/omap5/config.mk
@@ -9,5 +9,5 @@ 
 ifdef CONFIG_SPL_BUILD
 ALL-y	+= $(OBJTREE)/MLO
 else
-ALL-y	+= $(obj)u-boot.img
+ALL-y	+= u-boot.img
 endif
diff --git a/arch/arm/cpu/armv7/socfpga/config.mk b/arch/arm/cpu/armv7/socfpga/config.mk
index d33ab7d..3d18491 100644
--- a/arch/arm/cpu/armv7/socfpga/config.mk
+++ b/arch/arm/cpu/armv7/socfpga/config.mk
@@ -4,5 +4,5 @@ 
 # SPDX-License-Identifier:	GPL-2.0+
 #
 ifndef CONFIG_SPL_BUILD
-ALL-y	+= $(obj)u-boot.img
+ALL-y	+= u-boot.img
 endif
diff --git a/arch/blackfin/config.mk b/arch/blackfin/config.mk
index 73fa798..c752025 100644
--- a/arch/blackfin/config.mk
+++ b/arch/blackfin/config.mk
@@ -12,7 +12,7 @@  CONFIG_STANDALONE_LOAD_ADDR ?= 0x1000 -m elf32bfin
 ifeq ($(CONFIG_BFIN_CPU),)
 CONFIG_BFIN_CPU := \
 	$(shell awk '$$2 == "CONFIG_BFIN_CPU" { print $$3 }' \
-		$(src)include/configs/$(BOARD).h)
+		$(srctree)/include/configs/$(BOARD).h)
 else
 CONFIG_BFIN_CPU := $(strip $(CONFIG_BFIN_CPU:"%"=%))
 endif
@@ -28,10 +28,10 @@  PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
 PLATFORM_RELFLAGS += -mcpu=$(CONFIG_BFIN_CPU)
 
 ifneq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_BYPASS)
-ALL-y += $(obj)u-boot.ldr
+ALL-y += u-boot.ldr
 endif
 ifeq ($(CONFIG_ENV_IS_EMBEDDED_IN_LDR),y)
-CREATE_LDR_ENV = $(obj)tools/envcrc --binary > $(obj)env-ldr.o
+CREATE_LDR_ENV = tools/envcrc --binary > env-ldr.o
 HOSTCFLAGS_NOPED_ADSP := \
 	$(shell $(CPP) -dD - -mcpu=$(CONFIG_BFIN_CPU) </dev/null \
 		| awk '$$2 ~ /ADSP/ { print "-D" $$2 }')
@@ -47,10 +47,10 @@  LDR_FLAGS-$(CONFIG_BFIN_BOOTROM_USES_EVT1) += -J
 
 LDR_FLAGS += --bmode $(subst BFIN_BOOT_,,$(CONFIG_BFIN_BOOT_MODE))
 LDR_FLAGS += --use-vmas
-LDR_FLAGS += --initcode $(obj)$(CPUDIR)/initcode.o
+LDR_FLAGS += --initcode $(CPUDIR)/initcode.o
 ifneq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_UART)
 LDR_FLAGS-$(CONFIG_ENV_IS_EMBEDDED_IN_LDR) += \
-	--punchit $$(($(CONFIG_ENV_OFFSET))):$$(($(CONFIG_ENV_SIZE))):$(obj)env-ldr.o
+	--punchit $$(($(CONFIG_ENV_OFFSET))):$$(($(CONFIG_ENV_SIZE))):env-ldr.o
 endif
 ifneq (,$(findstring s,$(MAKEFLAGS)))
 LDR_FLAGS += --quiet
diff --git a/arch/blackfin/cpu/Makefile b/arch/blackfin/cpu/Makefile
index a61594a..369dc74 100644
--- a/arch/blackfin/cpu/Makefile
+++ b/arch/blackfin/cpu/Makefile
@@ -25,9 +25,9 @@  extra-y += check_initcode
 
 # make sure our initcode (which goes into LDR) does not
 # have relocs or external references
-$(obj)initcode.o: CFLAGS += -fno-function-sections -fno-data-sections
+$(obj)/initcode.o: CFLAGS += -fno-function-sections -fno-data-sections
 READINIT = env LC_ALL=C $(CROSS_COMPILE)readelf -s $<
-$(obj)check_initcode: $(obj)initcode.o
+$(obj)/check_initcode: $(obj)/initcode.o
 ifneq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_BYPASS)
 	@if $(READINIT) | grep '\<GLOBAL\>.*\<UND\>' ; then \
 		echo "$< contains external references!" 1>&2 ; \
@@ -35,7 +35,7 @@  ifneq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_BYPASS)
 	fi
 endif
 
-$(obj)init.lds: init.lds.S
+$(obj)/init.lds: $(src)/init.lds.S
 	$(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P $^ -o $@
-$(obj)init.elf: $(obj)init.lds $(obj)init.o $(obj)initcode.o
+$(obj)/init.elf: $(obj)/init.lds $(obj)/init.o $(obj)/initcode.o
 	$(LD) $(LDFLAGS) -T $^ -o $@
diff --git a/arch/mips/cpu/mips32/config.mk b/arch/mips/cpu/mips32/config.mk
index 067f871..7ee7faa 100644
--- a/arch/mips/cpu/mips32/config.mk
+++ b/arch/mips/cpu/mips32/config.mk
@@ -21,4 +21,4 @@  else
 PLATFORM_LDFLAGS  += -m elf32ltsmip
 endif
 
-CONFIG_STANDALONE_LOAD_ADDR ?= 0x80200000 -T mips.lds
+CONFIG_STANDALONE_LOAD_ADDR ?= 0x80200000 -T $(srctree)/$(src)/mips.lds
diff --git a/arch/mips/cpu/mips64/config.mk b/arch/mips/cpu/mips64/config.mk
index d1a8b2c..02113a1 100644
--- a/arch/mips/cpu/mips64/config.mk
+++ b/arch/mips/cpu/mips64/config.mk
@@ -21,4 +21,4 @@  else
 PLATFORM_LDFLAGS  += -m elf64ltsmip
 endif
 
-CONFIG_STANDALONE_LOAD_ADDR ?= 0xffffffff80200000 -T mips64.lds
+CONFIG_STANDALONE_LOAD_ADDR ?= 0xffffffff80200000 -T $(srctree)/$(src)/mips64.lds
diff --git a/arch/mips/cpu/xburst/config.mk b/arch/mips/cpu/xburst/config.mk
index d81da21..00b0fd9 100644
--- a/arch/mips/cpu/xburst/config.mk
+++ b/arch/mips/cpu/xburst/config.mk
@@ -12,4 +12,4 @@  else
 PLATFORM_LDFLAGS  += -m elf32ltsmip
 endif
 
-CONFIG_STANDALONE_LOAD_ADDR ?= 0x80200000 -T mips.lds
+CONFIG_STANDALONE_LOAD_ADDR ?= 0x80200000 -T $(srctree)/$(src)/mips.lds
diff --git a/arch/nds32/config.mk b/arch/nds32/config.mk
index e93e3a8..550f8a4 100644
--- a/arch/nds32/config.mk
+++ b/arch/nds32/config.mk
@@ -10,7 +10,7 @@ 
 
 CROSS_COMPILE ?= nds32le-linux-
 
-CONFIG_STANDALONE_LOAD_ADDR = 0x300000 -T nds32.lds
+CONFIG_STANDALONE_LOAD_ADDR = 0x300000 -T $(srctree)/$(src)/nds32.lds
 
 PLATFORM_RELFLAGS	+= -fno-strict-aliasing -fno-common -mrelax
 PLATFORM_RELFLAGS	+= -gdwarf-2
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index a706d3c..ac780d4 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -54,11 +54,11 @@  ifndef CONFIG_SPL_BUILD
 # Workaround for local bus unaligned access problems
 # on MPC512x and MPC5200
 ifdef CONFIG_MPC512X
-$(obj)ppcstring.o: AFLAGS += -Dmemcpy=__memcpy
+$(obj)/ppcstring.o: AFLAGS += -Dmemcpy=__memcpy
 obj-y += memcpy_mpc5200.o
 endif
 ifdef CONFIG_MPC5200
-$(obj)ppcstring.o: AFLAGS += -Dmemcpy=__memcpy
+$(obj)/ppcstring.o: AFLAGS += -Dmemcpy=__memcpy
 obj-y += memcpy_mpc5200.o
 endif
 endif
diff --git a/arch/sandbox/cpu/Makefile b/arch/sandbox/cpu/Makefile
index b564294..c5f5426 100644
--- a/arch/sandbox/cpu/Makefile
+++ b/arch/sandbox/cpu/Makefile
@@ -10,7 +10,7 @@ 
 obj-y	:= cpu.o os.o start.o state.o
 
 # os.c is build in the system environment, so needs standard includes
-$(obj)os.o: CFLAGS := $(filter-out -nostdinc,\
+$(obj)/os.o: CFLAGS := $(filter-out -nostdinc,\
 	$(patsubst -I%,-idirafter%,$(CFLAGS)))
-$(obj).depend.os: CPPFLAGS := $(filter-out -nostdinc,\
+$(obj)/.depend.os: CPPFLAGS := $(filter-out -nostdinc,\
 	$(patsubst -I%,-idirafter%,$(CPPFLAGS)))
diff --git a/arch/sparc/config.mk b/arch/sparc/config.mk
index e94e7cb..9bb3724 100644
--- a/arch/sparc/config.mk
+++ b/arch/sparc/config.mk
@@ -7,6 +7,7 @@ 
 
 CROSS_COMPILE ?= sparc-elf-
 
-CONFIG_STANDALONE_LOAD_ADDR ?= 0x00000000 -L $(gcclibdir) -T sparc.lds
+CONFIG_STANDALONE_LOAD_ADDR ?= 0x00000000 -L $(gcclibdir) \
+			-T $(srctree)/$(src)/sparc.lds
 
 PLATFORM_CPPFLAGS += -DCONFIG_SPARC -D__sparc__
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 638f790..a35d062 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -23,5 +23,5 @@  obj-$(CONFIG_CMD_ZBOOT)	+= zimage.o
 LIBGCC := $(notdir $(NORMAL_LIBGCC))
 extra-y := $(LIBGCC)
 
-$(obj)$(LIBGCC): $(NORMAL_LIBGCC)
+$(obj)/$(LIBGCC): $(NORMAL_LIBGCC)
 	$(OBJCOPY) $< $@ --prefix-symbols=__normal_
diff --git a/board/ait/cam_enc_4xx/config.mk b/board/ait/cam_enc_4xx/config.mk
index d7e7894..c7cfaca 100644
--- a/board/ait/cam_enc_4xx/config.mk
+++ b/board/ait/cam_enc_4xx/config.mk
@@ -9,7 +9,7 @@ 
 
 UBL_CONFIG = $(SRCTREE)/board/$(BOARDDIR)/ublimage.cfg
 ifndef CONFIG_SPL_BUILD
-ALL-y += $(obj)u-boot.ubl
+ALL-y += u-boot.ubl
 else
 # as SPL_TEXT_BASE is not page-aligned, we need for some
 # linkers the -n flag (Do not page align data), to prevent
diff --git a/board/avionic-design/medcom-wide/Makefile b/board/avionic-design/medcom-wide/Makefile
index 87e1912..bcf7ccf 100644
--- a/board/avionic-design/medcom-wide/Makefile
+++ b/board/avionic-design/medcom-wide/Makefile
@@ -9,4 +9,4 @@ 
 
 obj-y	:= ../common/tamonten.o
 
-include ../../nvidia/common/common.mk
+include $(srctree)/board/nvidia/common/common.mk
diff --git a/board/avionic-design/plutux/Makefile b/board/avionic-design/plutux/Makefile
index 87e1912..bcf7ccf 100644
--- a/board/avionic-design/plutux/Makefile
+++ b/board/avionic-design/plutux/Makefile
@@ -9,4 +9,4 @@ 
 
 obj-y	:= ../common/tamonten.o
 
-include ../../nvidia/common/common.mk
+include $(srctree)/board/nvidia/common/common.mk
diff --git a/board/avionic-design/tec/Makefile b/board/avionic-design/tec/Makefile
index 87e1912..bcf7ccf 100644
--- a/board/avionic-design/tec/Makefile
+++ b/board/avionic-design/tec/Makefile
@@ -9,4 +9,4 @@ 
 
 obj-y	:= ../common/tamonten.o
 
-include ../../nvidia/common/common.mk
+include $(srctree)/board/nvidia/common/common.mk
diff --git a/board/compal/paz00/Makefile b/board/compal/paz00/Makefile
index b2d3b6b..e6a0b29 100644
--- a/board/compal/paz00/Makefile
+++ b/board/compal/paz00/Makefile
@@ -16,4 +16,4 @@ 
 
 obj-y	:= paz00.o
 
-include ../../nvidia/common/common.mk
+include $(srctree)/board/nvidia/common/common.mk
diff --git a/board/compulab/trimslice/Makefile b/board/compulab/trimslice/Makefile
index f3bd00d..311eb92 100644
--- a/board/compulab/trimslice/Makefile
+++ b/board/compulab/trimslice/Makefile
@@ -7,4 +7,4 @@ 
 
 obj-y	:= trimslice.o
 
-include ../../nvidia/common/common.mk
+include $(srctree)/board/nvidia/common/common.mk
diff --git a/board/cray/L1/Makefile b/board/cray/L1/Makefile
index 5f6c690..6aae9fa 100644
--- a/board/cray/L1/Makefile
+++ b/board/cray/L1/Makefile
@@ -9,8 +9,8 @@  obj-y	= L1.o flash.o
 obj-y	+= init.o
 obj-y	+= bootscript.o
 
-$(obj)bootscript.c: $(obj)bootscript.image
-	od -t x1 -v -A x $^ | awk -f x2c.awk > $@
+$(obj)/bootscript.c: $(obj)/bootscript.image
+	od -t x1 -v -A x $^ | awk -f $(srctree)/$(src)/x2c.awk > $@
 
-$(obj)bootscript.image: $(src)bootscript.hush $(src)Makefile
-	-$(OBJTREE)/tools/mkimage -A ppc -O linux -T script -C none -a 0 -e 0 -n bootscript -d $(src)bootscript.hush $@
+$(obj)/bootscript.image: $(src)/bootscript.hush
+	-$(OBJTREE)/tools/mkimage -A ppc -O linux -T script -C none -a 0 -e 0 -n bootscript -d $< $@
diff --git a/board/h2200/Makefile b/board/h2200/Makefile
index d4fa153..e516e91 100644
--- a/board/h2200/Makefile
+++ b/board/h2200/Makefile
@@ -10,5 +10,5 @@  obj-y	:= h2200.o
 
 extra-y := h2200-header.bin
 
-$(obj)h2200-header.bin: $(obj)h2200-header.o
+$(obj)/h2200-header.bin: $(obj)/h2200-header.o
 	$(OBJCOPY) -O binary $< $@
diff --git a/board/matrix_vision/mvblm7/Makefile b/board/matrix_vision/mvblm7/Makefile
index 879d794..1bc1d61 100644
--- a/board/matrix_vision/mvblm7/Makefile
+++ b/board/matrix_vision/mvblm7/Makefile
@@ -8,5 +8,5 @@  obj-y	:= mvblm7.o pci.o fpga.o
 
 extra-y := bootscript.img
 
-$(obj)bootscript.img:
-	@mkimage -T script -C none -n M7_script -d bootscript $@
+$(obj)/bootscript.img: $(src)/bootscript
+	@mkimage -T script -C none -n M7_script -d $< $@
diff --git a/board/matrix_vision/mvsmr/Makefile b/board/matrix_vision/mvsmr/Makefile
index b6a4f67..9454259 100644
--- a/board/matrix_vision/mvsmr/Makefile
+++ b/board/matrix_vision/mvsmr/Makefile
@@ -12,5 +12,5 @@  obj-y	:= mvsmr.o fpga.o
 
 extra-y := bootscript.img
 
-$(obj)bootscript.img: bootscript
+$(obj)/bootscript.img: $(src)/bootscript
 	@mkimage -T script -C none -n mvSMR_Script -d $< $@
diff --git a/board/nvidia/common/Makefile b/board/nvidia/common/Makefile
index e3fcf2b..e3b2651 100644
--- a/board/nvidia/common/Makefile
+++ b/board/nvidia/common/Makefile
@@ -1,4 +1,4 @@ 
 # Copyright (c) 2011 The Chromium OS Authors.
 # SPDX-License-Identifier:	GPL-2.0+
 
-include common.mk
+include $(src)/common.mk
diff --git a/board/pcs440ep/config.mk b/board/pcs440ep/config.mk
index 1e76128..b90d5d0 100644
--- a/board/pcs440ep/config.mk
+++ b/board/pcs440ep/config.mk
@@ -10,7 +10,7 @@ 
 #
 
 # Check the U-Boot Image with a SHA1 checksum
-ALL-y += $(obj)u-boot.sha1
+ALL-y += u-boot.sha1
 
 PLATFORM_CPPFLAGS += -DCONFIG_440=1
 
diff --git a/board/samsung/origen/Makefile b/board/samsung/origen/Makefile
index 31e88f4..37acba7 100644
--- a/board/samsung/origen/Makefile
+++ b/board/samsung/origen/Makefile
@@ -13,7 +13,7 @@  always := $(hostprogs-y)
 #
 # TODO:
 # Fix the root cause in tools/mkorigenspl.c and delete the following work-around
-$(obj)tools/mkorigenspl: HOSTCFLAGS:=$(filter-out -O2,$(HOSTCFLAGS))
+$(obj)/tools/mkorigenspl: HOSTCFLAGS:=$(filter-out -O2,$(HOSTCFLAGS))
 else
 obj-y	+= origen.o
 endif
diff --git a/common/Makefile b/common/Makefile
index d12cba5..cd86e4a 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -230,11 +230,10 @@  obj-$(CONFIG_FIT_SIGNATURE) += image-sig.o
 obj-y += memsize.o
 obj-y += stdio.o
 
-$(obj)env_embedded.o: $(src)env_embedded.c
+$(obj)/env_embedded.o: $(src)/env_embedded.c
 	$(CC) $(AFLAGS) -Wa,--no-warn \
-		-DENV_CRC=$(shell $(obj)../tools/envcrc) \
-		-c -o $@ $(src)env_embedded.c
+		-DENV_CRC=$(shell tools/envcrc) -c -o $@ $<
 
 # SEE README.arm-unaligned-accesses
-$(obj)hush.o: CFLAGS += $(PLATFORM_NO_UNALIGNED)
-$(obj)fdt_support.o: CFLAGS += $(PLATFORM_NO_UNALIGNED)
+$(obj)/hush.o: CFLAGS += $(PLATFORM_NO_UNALIGNED)
+$(obj)/fdt_support.o: CFLAGS += $(PLATFORM_NO_UNALIGNED)
diff --git a/config.mk b/config.mk
index ed1a519..0fa3167 100644
--- a/config.mk
+++ b/config.mk
@@ -6,42 +6,6 @@ 
 #
 #########################################################################
 
-ifeq ($(CURDIR),$(SRCTREE))
-dir :=
-else
-dir := $(subst $(SRCTREE)/,,$(CURDIR))
-endif
-
-ifneq ($(OBJTREE),$(SRCTREE))
-# Create object files for SPL in a separate directory
-ifeq ($(CONFIG_SPL_BUILD),y)
-ifeq ($(CONFIG_TPL_BUILD),y)
-obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
-else
-obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
-endif
-else
-obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
-endif
-src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
-
-$(shell mkdir -p $(obj))
-else
-# Create object files for SPL in a separate directory
-ifeq ($(CONFIG_SPL_BUILD),y)
-ifeq ($(CONFIG_TPL_BUILD),y)
-obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
-else
-obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
-
-endif
-$(shell mkdir -p $(obj))
-else
-obj :=
-endif
-src :=
-endif
-
 # clean the slate ...
 PLATFORM_RELFLAGS =
 PLATFORM_CPPFLAGS =
@@ -52,14 +16,14 @@  PLATFORM_LDFLAGS =
 # Load generated board configuration
 ifeq ($(CONFIG_TPL_BUILD),y)
 # Include TPL autoconf
-sinclude $(OBJTREE)/include/tpl-autoconf.mk
+sinclude include/tpl-autoconf.mk
 else
 ifeq ($(CONFIG_SPL_BUILD),y)
 # Include SPL autoconf
-sinclude $(OBJTREE)/include/spl-autoconf.mk
+sinclude include/spl-autoconf.mk
 else
 # Include normal autoconf
-sinclude $(OBJTREE)/include/autoconf.mk
+sinclude include/autoconf.mk
 endif
 endif
 sinclude $(OBJTREE)/include/config.mk
diff --git a/doc/DocBook/Makefile b/doc/DocBook/Makefile
index 29b79d7..4bf0415 100644
--- a/doc/DocBook/Makefile
+++ b/doc/DocBook/Makefile
@@ -6,8 +6,6 @@ 
 # To add a new book the only step required is to add the book to the
 # list of DOCBOOKS.
 
-include $(TOPDIR)/config.mk
-
 DOCBOOKS := fs.xml linker_lists.xml stdio.xml
 
 ###
diff --git a/drivers/bios_emulator/Makefile b/drivers/bios_emulator/Makefile
index 52a2ceb..330f36f 100644
--- a/drivers/bios_emulator/Makefile
+++ b/drivers/bios_emulator/Makefile
@@ -8,7 +8,7 @@  obj-y = atibios.o biosemu.o besys.o bios.o \
 	$(X86DIR)/sys.o \
 	$(X86DIR)/debug.o
 
-EXTRA_CFLAGS += -I. -I./include \
+EXTRA_CFLAGS += -I$(srctree)/$(src) -I$(srctree)/$(src)/include \
 	-D__PPC__  -D__BIG_ENDIAN__
 
 CFLAGS += $(EXTRA_CFLAGS)
diff --git a/dts/Makefile b/dts/Makefile
index 6c7198f..d81f32d 100644
--- a/dts/Makefile
+++ b/dts/Makefile
@@ -26,7 +26,7 @@  DTC_FLAGS := -R 4 -p 0x1000 \
 # Use a constant name for this so we can access it from C code.
 # objcopy doesn't seem to allow us to set the symbol name independently of
 # the filename.
-DT_BIN	:= $(obj)dt.dtb
+DT_BIN	:= $(obj)/dt.dtb
 
 $(DT_BIN): $(TOPDIR)/board/$(VENDOR)/dts/$(DEVICE_TREE).dts
 	$(CPP) $(DTS_CPPFLAGS) $< -o $(DT_BIN).dts.tmp
@@ -38,7 +38,7 @@  process_lds = \
 # Run the compiler and get the link script from the linker
 GET_LDS = $(CC) $(CFLAGS) $(LDFLAGS) -Wl,--verbose 2>&1
 
-$(obj)dt.o: $(DT_BIN)
+$(obj)/dt.o: $(DT_BIN)
 	# We want the output format and arch.
 	# We also hope to win a prize for ugliest Makefile / shell interaction
 	# We look in the LDSCRIPT first.
@@ -62,7 +62,7 @@  $(obj)dt.o: $(DT_BIN)
 	\
 	cd $(dir ${DT_BIN}) && \
 	$(OBJCOPY) -I binary -O $${oformat} -B $${oarch} \
-		$(notdir ${DT_BIN}) $@
+		$(notdir ${DT_BIN}) $(notdir $@)
 	rm $(DT_BIN)
 
 obj-$(CONFIG_OF_EMBED)	:= dt.o
diff --git a/examples/api/Makefile b/examples/api/Makefile
index ee3c487..db0bb34 100644
--- a/examples/api/Makefile
+++ b/examples/api/Makefile
@@ -40,23 +40,23 @@  SRCS	+= $(addprefix $(SRCTREE)/examples/api/,$(COBJ_FILES-y:.o=.c))
 SRCS	+= $(addprefix $(SRCTREE)/examples/api/,$(SOBJ_FILES-y:.o=.S))
 
 # Create a list of object files to be compiled
-OBJS	+= $(addprefix $(obj),$(SOBJ_FILES-y))
-OBJS	+= $(addprefix $(obj),$(COBJ_FILES-y))
-OBJS	+= $(addprefix $(obj),$(notdir $(EXT_COBJ_FILES-y)))
-OBJS	+= $(addprefix $(obj),$(notdir $(EXT_SOBJ_FILES-y)))
+OBJS	+= $(addprefix $(obj)/,$(SOBJ_FILES-y))
+OBJS	+= $(addprefix $(obj)/,$(COBJ_FILES-y))
+OBJS	+= $(addprefix $(obj)/,$(notdir $(EXT_COBJ_FILES-y)))
+OBJS	+= $(addprefix $(obj)/,$(notdir $(EXT_SOBJ_FILES-y)))
 
 #########################################################################
 
-$(obj)demo:	$(OBJS)
+$(obj)/demo:	$(OBJS)
 		$(LD) --gc-sections -Ttext $(LOAD_ADDR) -o $@ $^ $(PLATFORM_LIBS)
 
-$(obj)demo.bin: $(obj)demo
+$(obj)/demo.bin: $(obj)/demo
 		$(OBJCOPY) -O binary $< $@ 2>/dev/null
 
 # Rule to build generic library C files
-$(addprefix $(obj),$(notdir $(EXT_COBJ_FILES-y))): $(obj)%.o: $(SRCTREE)/lib/%.c
+$(addprefix $(obj)/,$(notdir $(EXT_COBJ_FILES-y))): $(obj)/%.o: $(SRCTREE)/lib/%.c
 	$(CC) -g $(CFLAGS) -c -o $@ $<
 
 # Rule to build architecture-specific library assembly files
-$(addprefix $(obj),$(notdir $(EXT_SOBJ_FILES-y))): $(obj)%.o: $(SRCTREE)/arch/$(ARCH)/lib/%.S
+$(addprefix $(obj)/,$(notdir $(EXT_SOBJ_FILES-y))): $(obj)/%.o: $(SRCTREE)/arch/$(ARCH)/lib/%.S
 	$(CC) -g $(CFLAGS) -c -o $@ $<
diff --git a/examples/standalone/Makefile b/examples/standalone/Makefile
index 1f8d70c..a6819f7 100644
--- a/examples/standalone/Makefile
+++ b/examples/standalone/Makefile
@@ -31,7 +31,7 @@  clean-files  := $(extra-) $(addsuffix .srec,$(extra-)) $(addsuffix .bin,$(extra-
 
 COBJS	:= $(ELF:=.o)
 
-LIB	= $(obj)libstubs.o
+LIB	= $(obj)/libstubs.o
 
 LIBAOBJS-$(CONFIG_PPC) += ppc_longjmp.o ppc_setjmp.o
 LIBAOBJS-$(CONFIG_8xx) += test_burst_lib.o
@@ -39,11 +39,11 @@  LIBAOBJS := $(LIBAOBJS-y)
 
 LIBCOBJS = stubs.o
 
-LIBOBJS	= $(addprefix $(obj),$(LIBAOBJS) $(LIBCOBJS))
+LIBOBJS	= $(addprefix $(obj)/,$(LIBAOBJS) $(LIBCOBJS))
 
 SRCS	:= $(COBJS:.o=.c) $(LIBCOBJS:.o=.c) $(LIBAOBJS:.o=.S)
-OBJS	:= $(addprefix $(obj),$(COBJS))
-ELF	:= $(addprefix $(obj),$(ELF))
+OBJS	:= $(addprefix $(obj)/,$(COBJS))
+ELF	:= $(addprefix $(obj)/,$(ELF))
 
 gcclibdir := $(shell dirname `$(CC) -print-libgcc-file-name`)
 
@@ -67,13 +67,13 @@  $(LIB):	$(LIBOBJS)
 	$(call cmd_link_o_target, $(LIBOBJS))
 
 $(ELF):
-$(obj)%:	$(obj)%.o $(LIB)
+$(obj)/%:	$(obj)/%.o $(LIB)
 		$(LD) $(LDFLAGS) -g -Ttext $(CONFIG_STANDALONE_LOAD_ADDR) \
 			-o $@ -e $(SYM_PREFIX)$(notdir $(<:.o=)) $< $(LIB) \
 			-L$(gcclibdir) -lgcc
 
-$(obj)%.srec:	$(obj)%
+$(obj)/%.srec:	$(obj)/%
 		$(OBJCOPY) -O srec $< $@ 2>/dev/null
 
-$(obj)%.bin:	$(obj)%
+$(obj)/%.bin:	$(obj)/%
 		$(OBJCOPY) -O binary $< $@ 2>/dev/null
diff --git a/fs/ubifs/Makefile b/fs/ubifs/Makefile
index 389b0e3..5682b16 100644
--- a/fs/ubifs/Makefile
+++ b/fs/ubifs/Makefile
@@ -15,4 +15,4 @@  obj-y += tnc.o tnc_misc.o debug.o crc16.o budget.o
 obj-y += log.o orphan.o recovery.o replay.o
 
 # SEE README.arm-unaligned-accesses
-$(obj)super.o: CFLAGS += $(PLATFORM_NO_UNALIGNED)
+$(obj)/super.o: CFLAGS += $(PLATFORM_NO_UNALIGNED)
diff --git a/lib/Makefile b/lib/Makefile
index e787f77..39e79dd 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -66,4 +66,4 @@  obj-$(CONFIG_BOOTP_RANDOM_DELAY) += rand.o
 obj-$(CONFIG_CMD_LINK_LOCAL) += rand.o
 
 # SEE README.arm-unaligned-accesses
-$(obj)bzlib.o: CFLAGS += $(PLATFORM_NO_UNALIGNED)
+$(obj)/bzlib.o: CFLAGS += $(PLATFORM_NO_UNALIGNED)
diff --git a/mkconfig b/mkconfig
index 40db991..e8adf77 100755
--- a/mkconfig
+++ b/mkconfig
@@ -23,7 +23,7 @@  options=""
 
 if [ \( $# -eq 2 \) -a \( "$1" = "-A" \) ] ; then
 	# Automatic mode
-	line=`awk '($0 !~ /^#/ && $7 ~ /^'"$2"'$/) { print $1, $2, $3, $4, $5, $6, $7, $8 }' boards.cfg`
+	line=`awk '($0 !~ /^#/ && $7 ~ /^'"$2"'$/) { print $1, $2, $3, $4, $5, $6, $7, $8 }' $srctree/boards.cfg`
 	if [ -z "$line" ] ; then
 		echo "make: *** No rule to make target \`$2_config'.  Stop." >&2
 		exit 1
diff --git a/nand_spl/board/amcc/acadia/Makefile b/nand_spl/board/amcc/acadia/Makefile
index 3b00d49..041213f 100644
--- a/nand_spl/board/amcc/acadia/Makefile
+++ b/nand_spl/board/amcc/acadia/Makefile
@@ -18,8 +18,8 @@  CFLAGS	+= -DCONFIG_NAND_SPL
 SOBJS	= start.o resetvec.o cache.o
 COBJS	= gpio.o nand_boot.o nand_ecc.o memory.o ndfc.o pll.o
 
-SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(addprefix $(obj)/,$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj)/,$(SOBJS) $(COBJS))
 __OBJS	:= $(SOBJS) $(COBJS)
 LNDIR	:= $(nandobj)board/$(BOARDDIR)
 
@@ -47,49 +47,41 @@  $(nandobj)u-boot.lds: $(LDSCRIPT)
 # create symbolic links for common files
 
 # from cpu directory
-$(obj)cache.S:
+$(obj)/cache.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/cache.S $@
 
-$(obj)gpio.c:
+$(obj)/gpio.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/gpio.c $@
 
-$(obj)ndfc.c:
+$(obj)/ndfc.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/drivers/mtd/nand/ndfc.c $@
 
-$(obj)resetvec.S:
+$(obj)/resetvec.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/resetvec.S $@
 
-$(obj)start.S:
+$(obj)/start.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/start.S $@
 
 # from board directory
-$(obj)memory.c:
+$(obj)/memory.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/board/amcc/acadia/memory.c $@
 
-$(obj)pll.c:
+$(obj)/pll.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/board/amcc/acadia/pll.c $@
 
 # from nand_spl directory
-$(obj)nand_boot.c:
+$(obj)/nand_boot.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/nand_spl/nand_boot.c $@
 
 # from drivers/mtd/nand directory
-$(obj)nand_ecc.c:
+$(obj)/nand_ecc.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/drivers/mtd/nand/nand_ecc.c $@
-
-#########################################################################
-
-$(obj)%.o:	$(obj)%.S
-	$(CC) $(AFLAGS) -c -o $@ $<
-
-$(obj)%.o:	$(obj)%.c
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/nand_spl/board/amcc/bamboo/Makefile b/nand_spl/board/amcc/bamboo/Makefile
index 4063274..92b604e 100644
--- a/nand_spl/board/amcc/bamboo/Makefile
+++ b/nand_spl/board/amcc/bamboo/Makefile
@@ -18,8 +18,8 @@  CFLAGS	+= -DCONFIG_NAND_SPL
 SOBJS	= start.o init.o resetvec.o
 COBJS	= nand_boot.o nand_ecc.o ndfc.o sdram.o
 
-SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(addprefix $(obj)/,$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj)/,$(SOBJS) $(COBJS))
 __OBJS	:= $(SOBJS) $(COBJS)
 LNDIR	:= $(nandobj)board/$(BOARDDIR)
 
@@ -41,43 +41,29 @@  $(nandobj)u-boot.lds: $(LDSCRIPT)
 # create symbolic links for common files
 
 # from cpu directory
-$(obj)ndfc.c:
+$(obj)/ndfc.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/drivers/mtd/nand/ndfc.c $@
 
-$(obj)resetvec.S:
+$(obj)/resetvec.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/resetvec.S $@
 
-$(obj)start.S:
+$(obj)/start.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/start.S $@
 
 # from board directory
-$(obj)init.S:
+$(obj)/init.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/board/amcc/bamboo/init.S $@
 
 # from nand_spl directory
-$(obj)nand_boot.c:
+$(obj)/nand_boot.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/nand_spl/nand_boot.c $@
 
 # from drivers/mtd/nand directory
-$(obj)nand_ecc.c:
+$(obj)/nand_ecc.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/drivers/mtd/nand/nand_ecc.c $@
-
-ifneq ($(OBJTREE), $(SRCTREE))
-$(obj)sdram.c:
-	@rm -f $@
-	ln -s $(SRCTREE)/nand_spl/board/$(BOARDDIR)/sdram.c $@
-endif
-
-#########################################################################
-
-$(obj)%.o:	$(obj)%.S
-	$(CC) $(AFLAGS) -c -o $@ $<
-
-$(obj)%.o:	$(obj)%.c
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/nand_spl/board/amcc/canyonlands/Makefile b/nand_spl/board/amcc/canyonlands/Makefile
index 13c8b36..9a730e9 100644
--- a/nand_spl/board/amcc/canyonlands/Makefile
+++ b/nand_spl/board/amcc/canyonlands/Makefile
@@ -23,8 +23,8 @@  COBJS	+= nand_boot.o
 COBJS	+= nand_ecc.o
 COBJS	+= ndfc.o
 
-SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(addprefix $(obj)/,$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj)/,$(SOBJS) $(COBJS))
 __OBJS	:= $(SOBJS) $(COBJS)
 LNDIR	:= $(nandobj)board/$(BOARDDIR)
 
@@ -46,43 +46,29 @@  $(nandobj)u-boot.lds: $(LDSCRIPT)
 # create symbolic links for common files
 
 # from cpu directory
-$(obj)ndfc.c:
+$(obj)/ndfc.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/drivers/mtd/nand/ndfc.c $@
 
-$(obj)resetvec.S:
+$(obj)/resetvec.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/resetvec.S $@
 
-$(obj)start.S:
+$(obj)/start.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/start.S $@
 
 # from board directory
-$(obj)init.S:
+$(obj)/init.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/board/amcc/canyonlands/init.S $@
 
 # from nand_spl directory
-$(obj)nand_boot.c:
+$(obj)/nand_boot.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/nand_spl/nand_boot.c $@
 
 # from drivers/mtd/nand directory
-$(obj)nand_ecc.c:
+$(obj)/nand_ecc.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/drivers/mtd/nand/nand_ecc.c $@
-
-ifneq ($(OBJTREE), $(SRCTREE))
-$(obj)ddr2_fixed.c:
-	@rm -f $@
-	ln -s $(SRCTREE)/nand_spl/board/$(BOARDDIR)/ddr2_fixed.c $@
-endif
-
-#########################################################################
-
-$(obj)%.o:	$(obj)%.S
-	$(CC) $(AFLAGS) -c -o $@ $<
-
-$(obj)%.o:	$(obj)%.c
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/nand_spl/board/amcc/kilauea/Makefile b/nand_spl/board/amcc/kilauea/Makefile
index 9d07147..1c5498c 100644
--- a/nand_spl/board/amcc/kilauea/Makefile
+++ b/nand_spl/board/amcc/kilauea/Makefile
@@ -18,8 +18,8 @@  CFLAGS	+= -DCONFIG_NAND_SPL
 SOBJS	= start.o resetvec.o cache.o
 COBJS	= 44x_spd_ddr2.o nand_boot.o nand_ecc.o ndfc.o
 
-SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(addprefix $(obj)/,$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj)/,$(SOBJS) $(COBJS))
 __OBJS	:= $(SOBJS) $(COBJS)
 LNDIR	:= $(nandobj)board/$(BOARDDIR)
 
@@ -41,44 +41,36 @@  $(nandobj)u-boot.lds: $(LDSCRIPT)
 # create symbolic links for common files
 
 # from cpu directory
-$(obj)44x_spd_ddr2.c: $(obj)ecc.h
+$(obj)/44x_spd_ddr2.c: $(obj)/ecc.h
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/44x_spd_ddr2.c $@
 
-$(obj)cache.S:
+$(obj)/cache.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/cache.S $@
 
-$(obj)ecc.h:
+$(obj)/ecc.h:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/ecc.h $@
 
-$(obj)ndfc.c:
+$(obj)/ndfc.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/drivers/mtd/nand/ndfc.c $@
 
-$(obj)resetvec.S:
+$(obj)/resetvec.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/resetvec.S $@
 
-$(obj)start.S:
+$(obj)/start.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/start.S $@
 
 # from nand_spl directory
-$(obj)nand_boot.c:
+$(obj)/nand_boot.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/nand_spl/nand_boot.c $@
 
 # from drivers/nand directory
-$(obj)nand_ecc.c:
+$(obj)/nand_ecc.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/drivers/mtd/nand/nand_ecc.c $@
-
-#########################################################################
-
-$(obj)%.o:	$(obj)%.S
-	$(CC) $(AFLAGS) -c -o $@ $<
-
-$(obj)%.o:	$(obj)%.c
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/nand_spl/board/amcc/sequoia/Makefile b/nand_spl/board/amcc/sequoia/Makefile
index 111bb0d..62131ab 100644
--- a/nand_spl/board/amcc/sequoia/Makefile
+++ b/nand_spl/board/amcc/sequoia/Makefile
@@ -18,8 +18,8 @@  CFLAGS	+= -DCONFIG_NAND_SPL
 SOBJS	= start.o init.o resetvec.o
 COBJS	= denali_data_eye.o nand_boot.o nand_ecc.o ndfc.o sdram.o
 
-SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(addprefix $(obj)/,$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj)/,$(SOBJS) $(COBJS))
 __OBJS	:= $(SOBJS) $(COBJS)
 LNDIR	:= $(nandobj)board/$(BOARDDIR)
 
@@ -41,47 +41,39 @@  $(nandobj)u-boot.lds: $(LDSCRIPT)
 # create symbolic links for common files
 
 # from cpu directory
-$(obj)denali_data_eye.c:
+$(obj)/denali_data_eye.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/denali_data_eye.c $@
 
-$(obj)ndfc.c:
+$(obj)/ndfc.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/drivers/mtd/nand/ndfc.c $@
 
-$(obj)resetvec.S:
+$(obj)/resetvec.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/resetvec.S $@
 
-$(obj)start.S:
+$(obj)/start.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/start.S $@
 
 # from board directory
-$(obj)init.S:
+$(obj)/init.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/board/amcc/sequoia/init.S $@
 
-$(obj)sdram.c:
+$(obj)/sdram.c:
 	@rm -f $@
-	@rm -f $(obj)sdram.h
+	@rm -f $(obj)/sdram.h
 	ln -s $(SRCTREE)/board/amcc/sequoia/sdram.c $@
-	ln -s $(SRCTREE)/board/amcc/sequoia/sdram.h $(obj)sdram.h
+	ln -s $(SRCTREE)/board/amcc/sequoia/sdram.h $(obj)/sdram.h
 
 # from nand_spl directory
-$(obj)nand_boot.c:
+$(obj)/nand_boot.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/nand_spl/nand_boot.c $@
 
 # from drivers/mtd/nand directory
-$(obj)nand_ecc.c:
+$(obj)/nand_ecc.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/drivers/mtd/nand/nand_ecc.c $@
-
-#########################################################################
-
-$(obj)%.o:	$(obj)%.S
-	$(CC) $(AFLAGS) -c -o $@ $<
-
-$(obj)%.o:	$(obj)%.c
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/nand_spl/board/freescale/mpc8315erdb/Makefile b/nand_spl/board/freescale/mpc8315erdb/Makefile
index 7813823..a2054ee 100644
--- a/nand_spl/board/freescale/mpc8315erdb/Makefile
+++ b/nand_spl/board/freescale/mpc8315erdb/Makefile
@@ -20,8 +20,8 @@  SOBJS	= start.o ticks.o
 COBJS	= nand_boot_fsl_elbc.o $(BOARD).o sdram.o ns16550.o spl_minimal.o \
 	  time.o cache.o
 
-SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(addprefix $(obj)/,$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj)/,$(SOBJS) $(COBJS))
 __OBJS	:= $(SOBJS) $(COBJS)
 LNDIR	:= $(nandobj)board/$(BOARDDIR)
 
@@ -42,37 +42,29 @@  $(nandobj)u-boot.lds: $(LDSCRIPT)
 
 # create symbolic links for common files
 
-$(obj)start.S:
+$(obj)/start.S:
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc83xx/start.S $@
 
-$(obj)nand_boot_fsl_elbc.c:
+$(obj)/nand_boot_fsl_elbc.c:
 	ln -sf $(SRCTREE)/nand_spl/nand_boot_fsl_elbc.c $@
 
-$(obj)sdram.c:
+$(obj)/sdram.c:
 	ln -sf $(SRCTREE)/board/$(BOARDDIR)/sdram.c $@
 
-$(obj)$(BOARD).c:
+$(obj)/$(BOARD).c:
 	ln -sf $(SRCTREE)/board/$(BOARDDIR)/$(BOARD).c $@
 
-$(obj)ns16550.c:
+$(obj)/ns16550.c:
 	ln -sf $(SRCTREE)/drivers/serial/ns16550.c $@
 
-$(obj)spl_minimal.c:
+$(obj)/spl_minimal.c:
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc83xx/spl_minimal.c $@
 
-$(obj)cache.c:
+$(obj)/cache.c:
 	ln -sf $(SRCTREE)/arch/powerpc/lib/cache.c $@
 
-$(obj)time.c:
+$(obj)/time.c:
 	ln -sf $(SRCTREE)/arch/powerpc/lib/time.c $@
 
-$(obj)ticks.S:
+$(obj)/ticks.S:
 	ln -sf $(SRCTREE)/arch/powerpc/lib/ticks.S $@
-
-#########################################################################
-
-$(obj)%.o:	$(obj)%.S
-	$(CC) $(AFLAGS) -c -o $@ $<
-
-$(obj)%.o:	$(obj)%.c
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/nand_spl/board/freescale/mpc8536ds/Makefile b/nand_spl/board/freescale/mpc8536ds/Makefile
index 5d9953b..f711cf3 100644
--- a/nand_spl/board/freescale/mpc8536ds/Makefile
+++ b/nand_spl/board/freescale/mpc8536ds/Makefile
@@ -22,8 +22,8 @@  SOBJS	= start.o resetvec.o
 COBJS	= cache.o cpu_init_early.o spl_minimal.o fsl_law.o law.o \
 	  nand_boot.o nand_boot_fsl_elbc.o ns16550.o tlb.o tlb_table.o
 
-SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(addprefix $(obj)/,$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj)/,$(SOBJS) $(COBJS))
 __OBJS	:= $(SOBJS) $(COBJS)
 LNDIR	:= $(nandobj)board/$(BOARDDIR)
 
@@ -45,64 +45,50 @@  $(nandobj)u-boot-nand_spl.lds: $(LDSCRIPT)
 
 # create symbolic links for common files
 
-$(obj)cache.c:
+$(obj)/cache.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/lib/cache.c $@
 
-$(obj)cpu_init_early.c:
+$(obj)/cpu_init_early.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/cpu_init_early.c $@
 
-$(obj)spl_minimal.c:
+$(obj)/spl_minimal.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/spl_minimal.c $@
 
-$(obj)fsl_law.c:
+$(obj)/fsl_law.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc8xxx/law.c $@
 
-$(obj)law.c:
+$(obj)/law.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/board/$(BOARDDIR)/law.c $@
 
-$(obj)nand_boot_fsl_elbc.c:
+$(obj)/nand_boot_fsl_elbc.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/nand_spl/nand_boot_fsl_elbc.c $@
 
-$(obj)ns16550.c:
+$(obj)/ns16550.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/drivers/serial/ns16550.c $@
 
-$(obj)resetvec.S:
+$(obj)/resetvec.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/$(CPUDIR)/resetvec.S $@
 
-$(obj)fixed_ivor.S:
+$(obj)/fixed_ivor.S:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/fixed_ivor.S $@
 
-$(obj)start.S: $(obj)fixed_ivor.S
+$(obj)/start.S: $(obj)/fixed_ivor.S
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/start.S $@
 
-$(obj)tlb.c:
+$(obj)/tlb.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/tlb.c $@
 
-$(obj)tlb_table.c:
+$(obj)/tlb_table.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/board/$(BOARDDIR)/tlb.c $@
-
-ifneq ($(OBJTREE), $(SRCTREE))
-$(obj)nand_boot.c:
-	@rm -f $@
-	ln -s $(SRCTREE)/nand_spl/board/$(BOARDDIR)/nand_boot.c $@
-endif
-
-#########################################################################
-
-$(obj)%.o:	$(obj)%.S
-	$(CC) $(AFLAGS) -c -o $@ $<
-
-$(obj)%.o:	$(obj)%.c
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/nand_spl/board/freescale/mpc8569mds/Makefile b/nand_spl/board/freescale/mpc8569mds/Makefile
index 5d9953b..f711cf3 100644
--- a/nand_spl/board/freescale/mpc8569mds/Makefile
+++ b/nand_spl/board/freescale/mpc8569mds/Makefile
@@ -22,8 +22,8 @@  SOBJS	= start.o resetvec.o
 COBJS	= cache.o cpu_init_early.o spl_minimal.o fsl_law.o law.o \
 	  nand_boot.o nand_boot_fsl_elbc.o ns16550.o tlb.o tlb_table.o
 
-SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(addprefix $(obj)/,$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj)/,$(SOBJS) $(COBJS))
 __OBJS	:= $(SOBJS) $(COBJS)
 LNDIR	:= $(nandobj)board/$(BOARDDIR)
 
@@ -45,64 +45,50 @@  $(nandobj)u-boot-nand_spl.lds: $(LDSCRIPT)
 
 # create symbolic links for common files
 
-$(obj)cache.c:
+$(obj)/cache.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/lib/cache.c $@
 
-$(obj)cpu_init_early.c:
+$(obj)/cpu_init_early.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/cpu_init_early.c $@
 
-$(obj)spl_minimal.c:
+$(obj)/spl_minimal.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/spl_minimal.c $@
 
-$(obj)fsl_law.c:
+$(obj)/fsl_law.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc8xxx/law.c $@
 
-$(obj)law.c:
+$(obj)/law.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/board/$(BOARDDIR)/law.c $@
 
-$(obj)nand_boot_fsl_elbc.c:
+$(obj)/nand_boot_fsl_elbc.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/nand_spl/nand_boot_fsl_elbc.c $@
 
-$(obj)ns16550.c:
+$(obj)/ns16550.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/drivers/serial/ns16550.c $@
 
-$(obj)resetvec.S:
+$(obj)/resetvec.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/$(CPUDIR)/resetvec.S $@
 
-$(obj)fixed_ivor.S:
+$(obj)/fixed_ivor.S:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/fixed_ivor.S $@
 
-$(obj)start.S: $(obj)fixed_ivor.S
+$(obj)/start.S: $(obj)/fixed_ivor.S
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/start.S $@
 
-$(obj)tlb.c:
+$(obj)/tlb.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/tlb.c $@
 
-$(obj)tlb_table.c:
+$(obj)/tlb_table.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/board/$(BOARDDIR)/tlb.c $@
-
-ifneq ($(OBJTREE), $(SRCTREE))
-$(obj)nand_boot.c:
-	@rm -f $@
-	ln -s $(SRCTREE)/nand_spl/board/$(BOARDDIR)/nand_boot.c $@
-endif
-
-#########################################################################
-
-$(obj)%.o:	$(obj)%.S
-	$(CC) $(AFLAGS) -c -o $@ $<
-
-$(obj)%.o:	$(obj)%.c
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/nand_spl/board/freescale/mpc8572ds/Makefile b/nand_spl/board/freescale/mpc8572ds/Makefile
index 5d9953b..f711cf3 100644
--- a/nand_spl/board/freescale/mpc8572ds/Makefile
+++ b/nand_spl/board/freescale/mpc8572ds/Makefile
@@ -22,8 +22,8 @@  SOBJS	= start.o resetvec.o
 COBJS	= cache.o cpu_init_early.o spl_minimal.o fsl_law.o law.o \
 	  nand_boot.o nand_boot_fsl_elbc.o ns16550.o tlb.o tlb_table.o
 
-SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(addprefix $(obj)/,$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj)/,$(SOBJS) $(COBJS))
 __OBJS	:= $(SOBJS) $(COBJS)
 LNDIR	:= $(nandobj)board/$(BOARDDIR)
 
@@ -45,64 +45,50 @@  $(nandobj)u-boot-nand_spl.lds: $(LDSCRIPT)
 
 # create symbolic links for common files
 
-$(obj)cache.c:
+$(obj)/cache.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/lib/cache.c $@
 
-$(obj)cpu_init_early.c:
+$(obj)/cpu_init_early.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/cpu_init_early.c $@
 
-$(obj)spl_minimal.c:
+$(obj)/spl_minimal.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/spl_minimal.c $@
 
-$(obj)fsl_law.c:
+$(obj)/fsl_law.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc8xxx/law.c $@
 
-$(obj)law.c:
+$(obj)/law.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/board/$(BOARDDIR)/law.c $@
 
-$(obj)nand_boot_fsl_elbc.c:
+$(obj)/nand_boot_fsl_elbc.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/nand_spl/nand_boot_fsl_elbc.c $@
 
-$(obj)ns16550.c:
+$(obj)/ns16550.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/drivers/serial/ns16550.c $@
 
-$(obj)resetvec.S:
+$(obj)/resetvec.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/$(CPUDIR)/resetvec.S $@
 
-$(obj)fixed_ivor.S:
+$(obj)/fixed_ivor.S:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/fixed_ivor.S $@
 
-$(obj)start.S: $(obj)fixed_ivor.S
+$(obj)/start.S: $(obj)/fixed_ivor.S
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/start.S $@
 
-$(obj)tlb.c:
+$(obj)/tlb.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/tlb.c $@
 
-$(obj)tlb_table.c:
+$(obj)/tlb_table.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/board/$(BOARDDIR)/tlb.c $@
-
-ifneq ($(OBJTREE), $(SRCTREE))
-$(obj)nand_boot.c:
-	@rm -f $@
-	ln -s $(SRCTREE)/nand_spl/board/$(BOARDDIR)/nand_boot.c $@
-endif
-
-#########################################################################
-
-$(obj)%.o:	$(obj)%.S
-	$(CC) $(AFLAGS) -c -o $@ $<
-
-$(obj)%.o:	$(obj)%.c
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/nand_spl/board/freescale/p1023rds/Makefile b/nand_spl/board/freescale/p1023rds/Makefile
index 652590d..21a6920 100644
--- a/nand_spl/board/freescale/p1023rds/Makefile
+++ b/nand_spl/board/freescale/p1023rds/Makefile
@@ -18,8 +18,8 @@  SOBJS	= start.o resetvec.o
 COBJS	= cache.o cpu_init_early.o spl_minimal.o fsl_law.o law.o \
 	  nand_boot.o nand_boot_fsl_elbc.o ns16550.o tlb.o tlb_table.o
 
-SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(addprefix $(obj)/,$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj)/,$(SOBJS) $(COBJS))
 __OBJS	:= $(SOBJS) $(COBJS)
 LNDIR	:= $(nandobj)board/$(BOARDDIR)
 
@@ -41,64 +41,50 @@  $(nandobj)u-boot-nand_spl.lds: $(LDSCRIPT)
 
 # create symbolic links for common files
 
-$(obj)cache.c:
+$(obj)/cache.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/lib/cache.c $@
 
-$(obj)cpu_init_early.c:
+$(obj)/cpu_init_early.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/$(CPUDIR)/cpu_init_early.c $@
 
-$(obj)spl_minimal.c:
+$(obj)/spl_minimal.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/$(CPUDIR)/spl_minimal.c $@
 
-$(obj)fsl_law.c:
+$(obj)/fsl_law.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc8xxx/law.c $@
 
-$(obj)law.c:
+$(obj)/law.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/board/$(BOARDDIR)/law.c $@
 
-$(obj)nand_boot_fsl_elbc.c:
+$(obj)/nand_boot_fsl_elbc.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/nand_spl/nand_boot_fsl_elbc.c $@
 
-$(obj)ns16550.c:
+$(obj)/ns16550.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/drivers/serial/ns16550.c $@
 
-$(obj)resetvec.S:
+$(obj)/resetvec.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/$(CPUDIR)/resetvec.S $@
 
-$(obj)fixed_ivor.S:
+$(obj)/fixed_ivor.S:
 	@rm -f $@
 	ln -sf $(SRCTREE)/$(CPUDIR)/fixed_ivor.S $@
 
-$(obj)start.S: $(obj)fixed_ivor.S
+$(obj)/start.S: $(obj)/fixed_ivor.S
 	@rm -f $@
 	ln -sf $(SRCTREE)/$(CPUDIR)/start.S $@
 
-$(obj)tlb.c:
+$(obj)/tlb.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/$(CPUDIR)/tlb.c $@
 
-$(obj)tlb_table.c:
+$(obj)/tlb_table.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/board/$(BOARDDIR)/tlb.c $@
-
-ifneq ($(OBJTREE), $(SRCTREE))
-$(obj)nand_boot.c:
-	@rm -f $@
-	ln -s $(SRCTREE)/nand_spl/board/$(BOARDDIR)/nand_boot.c $@
-endif
-
-#########################################################################
-
-$(obj)%.o:	$(obj)%.S
-	$(CC) $(AFLAGS) -c -o $@ $<
-
-$(obj)%.o:	$(obj)%.c
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/nand_spl/board/freescale/p1_p2_rdb/Makefile b/nand_spl/board/freescale/p1_p2_rdb/Makefile
index 5d9953b..f711cf3 100644
--- a/nand_spl/board/freescale/p1_p2_rdb/Makefile
+++ b/nand_spl/board/freescale/p1_p2_rdb/Makefile
@@ -22,8 +22,8 @@  SOBJS	= start.o resetvec.o
 COBJS	= cache.o cpu_init_early.o spl_minimal.o fsl_law.o law.o \
 	  nand_boot.o nand_boot_fsl_elbc.o ns16550.o tlb.o tlb_table.o
 
-SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(addprefix $(obj)/,$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj)/,$(SOBJS) $(COBJS))
 __OBJS	:= $(SOBJS) $(COBJS)
 LNDIR	:= $(nandobj)board/$(BOARDDIR)
 
@@ -45,64 +45,50 @@  $(nandobj)u-boot-nand_spl.lds: $(LDSCRIPT)
 
 # create symbolic links for common files
 
-$(obj)cache.c:
+$(obj)/cache.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/lib/cache.c $@
 
-$(obj)cpu_init_early.c:
+$(obj)/cpu_init_early.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/cpu_init_early.c $@
 
-$(obj)spl_minimal.c:
+$(obj)/spl_minimal.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/spl_minimal.c $@
 
-$(obj)fsl_law.c:
+$(obj)/fsl_law.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc8xxx/law.c $@
 
-$(obj)law.c:
+$(obj)/law.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/board/$(BOARDDIR)/law.c $@
 
-$(obj)nand_boot_fsl_elbc.c:
+$(obj)/nand_boot_fsl_elbc.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/nand_spl/nand_boot_fsl_elbc.c $@
 
-$(obj)ns16550.c:
+$(obj)/ns16550.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/drivers/serial/ns16550.c $@
 
-$(obj)resetvec.S:
+$(obj)/resetvec.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/$(CPUDIR)/resetvec.S $@
 
-$(obj)fixed_ivor.S:
+$(obj)/fixed_ivor.S:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/fixed_ivor.S $@
 
-$(obj)start.S: $(obj)fixed_ivor.S
+$(obj)/start.S: $(obj)/fixed_ivor.S
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/start.S $@
 
-$(obj)tlb.c:
+$(obj)/tlb.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/tlb.c $@
 
-$(obj)tlb_table.c:
+$(obj)/tlb_table.c:
 	@rm -f $@
 	ln -sf $(SRCTREE)/board/$(BOARDDIR)/tlb.c $@
-
-ifneq ($(OBJTREE), $(SRCTREE))
-$(obj)nand_boot.c:
-	@rm -f $@
-	ln -s $(SRCTREE)/nand_spl/board/$(BOARDDIR)/nand_boot.c $@
-endif
-
-#########################################################################
-
-$(obj)%.o:	$(obj)%.S
-	$(CC) $(AFLAGS) -c -o $@ $<
-
-$(obj)%.o:	$(obj)%.c
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/nand_spl/board/sheldon/simpc8313/Makefile b/nand_spl/board/sheldon/simpc8313/Makefile
index 5e83abc..ca45ecd 100644
--- a/nand_spl/board/sheldon/simpc8313/Makefile
+++ b/nand_spl/board/sheldon/simpc8313/Makefile
@@ -19,8 +19,8 @@  SOBJS	= start.o ticks.o
 COBJS	= nand_boot_fsl_elbc.o $(BOARD).o sdram.o ns16550.o spl_minimal.o \
 	  time.o cache.o
 
-SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+SRCS	:= $(addprefix $(obj)/,$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj)/,$(SOBJS) $(COBJS))
 __OBJS	:= $(SOBJS) $(COBJS)
 LNDIR	:= $(nandobj)board/$(BOARDDIR)
 
@@ -41,46 +41,38 @@  $(nandobj)u-boot.lds: $(LDSCRIPT)
 
 # create symbolic links for common files
 
-$(obj)start.S:
+$(obj)/start.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/mpc83xx/start.S $@
 
-$(obj)nand_boot_fsl_elbc.c:
+$(obj)/nand_boot_fsl_elbc.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/nand_spl/nand_boot_fsl_elbc.c $@
 
-$(obj)sdram.c:
+$(obj)/sdram.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/board/$(BOARDDIR)/sdram.c $@
 
-$(obj)$(BOARD).c:
+$(obj)/$(BOARD).c:
 	@rm -f $@
 	ln -s $(SRCTREE)/board/$(BOARDDIR)/$(BOARD).c $@
 
-$(obj)ns16550.c:
+$(obj)/ns16550.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/drivers/serial/ns16550.c $@
 
-$(obj)spl_minimal.c:
+$(obj)/spl_minimal.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/cpu/mpc83xx/spl_minimal.c $@
 
-$(obj)cache.c:
+$(obj)/cache.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/lib/cache.c $@
 
-$(obj)time.c:
+$(obj)/time.c:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/lib/time.c $@
 
-$(obj)ticks.S:
+$(obj)/ticks.S:
 	@rm -f $@
 	ln -s $(SRCTREE)/arch/powerpc/lib/ticks.S $@
-
-#########################################################################
-
-$(obj)%.o:	$(obj)%.S
-	$(CC) $(AFLAGS) -c -o $@ $<
-
-$(obj)%.o:	$(obj)%.c
-	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/post/lib_powerpc/fpu/Makefile b/post/lib_powerpc/fpu/Makefile
index a7aa5bc..c720a26 100644
--- a/post/lib_powerpc/fpu/Makefile
+++ b/post/lib_powerpc/fpu/Makefile
@@ -18,7 +18,7 @@  obj-y	+= darwin-ldouble.o
 CFLAGS := $(shell echo $(CFLAGS) | sed s/-msoft-float//)
 CFLAGS += -mhard-float -fkeep-inline-functions
 
-$(addprefix $(obj),$(obj-y)): $(obj)%.o:	%.c
+$(addprefix $(obj)/,$(obj-y)): $(obj)/%.o: $(src)/%.c
 	$(CC)  $(ALL_CFLAGS) -o $@.fp $< -c
 	$(OBJCOPY) -R .gnu.attributes $@.fp $@
 	rm -f $@.fp
diff --git a/rules.mk b/rules.mk
index b36de4d..e4fd337 100644
--- a/rules.mk
+++ b/rules.mk
@@ -6,41 +6,42 @@ 
 #
 #########################################################################
 
-_depend:	$(obj).depend
+_depend:	$(obj)/.depend
 
 # Split the source files into two camps: those in the current directory, and
 # those somewhere else. For the first camp we want to support CPPFLAGS_<fname>
 # and for the second we don't / can't.
-PWD_SRCS := $(filter $(notdir $(SRCS)),$(SRCS))
-OTHER_SRCS := $(filter-out $(notdir $(SRCS)),$(SRCS))
+PWD_SRCS := $(foreach f,$(SRCS), $(if \
+	$(filter $(if $(KBUILD_SRC),$(srctree)/)$(src)/$(notdir $f),$f), $f))
+OTHER_SRCS := $(filter-out $(PWD_SRCS),$(SRCS))
 
 # This is a list of dependency files to generate
-DEPS := $(basename $(patsubst %,$(obj).depend.%,$(PWD_SRCS)))
+DEPS := $(basename $(addprefix $(obj)/.depend., $(notdir $(PWD_SRCS))))
 
 # Join all the dependencies into a single file, in three parts
 #	1 .Concatenate all the generated depend files together
 #	2. Add in the deps from OTHER_SRCS which we couldn't process
 #	3. Add in the HOSTSRCS
-$(obj).depend:	$(src)Makefile $(TOPDIR)/config.mk $(DEPS) $(OTHER_SRCS) \
+$(obj)/.depend:	$(TOPDIR)/config.mk $(DEPS) $(OTHER_SRCS) \
 		$(HOSTSRCS)
 	cat /dev/null $(DEPS) >$@
 	@for f in $(OTHER_SRCS); do \
 		g=`basename $$f | sed -e 's/\(.*\)\.[[:alnum:]_]/\1.o/'`; \
-		$(CC) -M $(CPPFLAGS) -MQ $(obj)$$g $$f >> $@ ; \
+		$(CC) -M $(CPPFLAGS) -MQ $(obj)/$$g $$f >> $@ ; \
 	done
 	@for f in $(HOSTSRCS); do \
 		g=`basename $$f | sed -e 's/\(.*\)\.[[:alnum:]_]/\1.o/'`; \
-		$(HOSTCC) -M $(HOSTCPPFLAGS) -MQ $(obj)$$g $$f >> $@ ; \
+		$(HOSTCC) -M $(HOSTCPPFLAGS) -MQ $(obj)/$$g $$f >> $@ ; \
 	done
 
 MAKE_DEPEND = $(CC) -M $(CPPFLAGS) $(EXTRA_CPPFLAGS_DEP) \
 		-MQ $(addsuffix .o,$(obj)$(basename $<)) $< >$@
 
 
-$(obj).depend.%:	%.c
+$(obj)/.depend.%:	$(src)/%.c
 	$(MAKE_DEPEND)
 
-$(obj).depend.%:	%.S
+$(obj)/.depend.%:	$(src)/%.S
 	$(MAKE_DEPEND)
 
 #########################################################################
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index ca5fd56..6113c13 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -165,9 +165,7 @@  ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2))
 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
 # Usage:
 # $(Q)$(MAKE) $(build)=dir
-#build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
-# temporary
-build := -f $(srctree)/scripts/Makefile.build -C
+build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
 
 ###
 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.modbuiltin obj=
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 7789efa..52a44ff 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -2,17 +2,28 @@ 
 .PHONY: all
 all:
 
+ifeq ($(CONFIG_TPL_BUILD),y)
+  src := $(patsubst tpl/%,%,$(obj))
+else
+  ifeq ($(CONFIG_SPL_BUILD),y)
+    src := $(patsubst spl/%,%,$(obj))
+  else
+    src := $(obj)
+  endif
+endif
+
 include $(srctree)/scripts/Kbuild.include
-include $(TOPDIR)/config.mk
+include $(srctree)/config.mk
 
 # variable LIB is used in examples/standalone/Makefile
-__LIB := $(obj)built-in.o
-LIBGCC = $(obj)libgcc.o
+__LIB := $(obj)/built-in.o
+LIBGCC = $(obj)/libgcc.o
 SRCS :=
 subdir-y :=
 obj-dirs :=
 
-include Makefile
+kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
+include $(kbuild-dir)/Makefile
 
 # Do not include host rules unless needed
 ifneq ($(hostprogs-y)$(hostprogs-m),)
@@ -28,31 +39,37 @@  lib-y := $(sort $(lib-y))
 subdir-y 	+= $(patsubst %/,%,$(filter %/, $(obj-y)))
 obj-y		:= $(patsubst %/, %/built-in.o, $(obj-y))
 subdir-obj-y	:= $(filter %/built-in.o, $(obj-y))
-subdir-obj-y	:= $(addprefix $(obj),$(subdir-obj-y))
+subdir-obj-y	:= $(addprefix $(obj)/,$(subdir-obj-y))
+
+SRCS	+= $(obj-y:.o=.c) $(obj-y:.o=.S) $(lib-y:.o=.c) \
+	$(lib-y:.o=.S) $(extra-y:.o=.c) $(extra-y:.o=.S)
 
-SRCS	+= $(wildcard $(obj-y:.o=.c) $(obj-y:.o=.S) $(lib-y:.o=.c) \
-	$(lib-y:.o=.S) $(extra-y:.o=.c) $(extra-y:.o=.S))
-OBJS	:= $(addprefix $(obj),$(obj-y))
+SRCS := $(addprefix $(if $(KBUILD_SRC),$(srctree)/$(src)/,$(src)/),$(SRCS))
+SRCS := $(wildcard $(SRCS))
+
+OBJS	:= $(addprefix $(obj)/,$(obj-y))
 
 # $(obj-dirs) is a list of directories that contain object files
 
 obj-dirs += $(dir $(OBJS))
 
+_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
+
 # Create directories for object files if directory does not exist
 # Needed when obj-y := dir/file.o syntax is used
 _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d)))
 
-LGOBJS := $(addprefix $(obj),$(sort $(lib-y)))
+LGOBJS := $(addprefix $(obj)/,$(sort $(lib-y)))
 
-all: $(__LIB) $(addprefix $(obj),$(extra-y) $(always)) $(subdir-y)
+all: $(__LIB) $(addprefix $(obj)/,$(extra-y) $(always)) $(subdir-y)
 
-$(__LIB):	$(obj).depend $(OBJS)
+$(__LIB):	$(obj)/.depend $(OBJS)
 	$(call cmd_link_o_target, $(OBJS))
 
 ifneq ($(strip $(lib-y)),)
 all: $(LIBGCC)
 
-$(LIBGCC): $(obj).depend $(LGOBJS)
+$(LIBGCC): $(obj)/.depend $(LGOBJS)
 	$(call cmd_link_o_target, $(LGOBJS))
 endif
 
@@ -63,7 +80,7 @@  endif
 
 ifneq ($(subdir-y),)
 $(subdir-y): FORCE
-	$(MAKE) -C $@ -f $(TOPDIR)/scripts/Makefile.build
+	$(MAKE) $(build)=$(obj)/$@
 endif
 
 #########################################################################
@@ -78,18 +95,18 @@  ALL_CFLAGS += $(EXTRA_CPPFLAGS)
 # See rules.mk
 EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
 		$(CPPFLAGS_$(BCURDIR))
-$(obj)%.s:	%.S
+$(obj)/%.s:	$(src)/%.S
 	$(CPP) $(ALL_AFLAGS) -o $@ $<
-$(obj)%.o:	%.S
+$(obj)/%.o:	$(src)/%.S
 	$(CC)  $(ALL_AFLAGS) -o $@ $< -c
-$(obj)%.o:	%.c
+$(obj)/%.o:	$(src)/%.c
 ifneq ($(CHECKSRC),0)
 	$(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $<
 endif
 	$(CC)  $(ALL_CFLAGS) -o $@ $< -c
-$(obj)%.i:	%.c
+$(obj)/%.i:	$(src)/%.c
 	$(CPP) $(ALL_CFLAGS) -o $@ $< -c
-$(obj)%.s:	%.c
+$(obj)/%.s:	$(src)/%.c
 	$(CC)  $(ALL_CFLAGS) -o $@ $< -c -S
 
 # If the list of objects to link is empty, just create an empty built-in.o
@@ -99,11 +116,11 @@  cmd_link_o_target = $(if $(strip $1),\
 
 #########################################################################
 
-# defines $(obj).depend target
+# defines $(obj)/.depend target
 
 include $(TOPDIR)/rules.mk
 
-sinclude $(obj).depend
+sinclude $(obj)/.depend
 
 #########################################################################
 
diff --git a/scripts/Makefile.host.tmp b/scripts/Makefile.host.tmp
index 4b57846..53fe930 100644
--- a/scripts/Makefile.host.tmp
+++ b/scripts/Makefile.host.tmp
@@ -21,11 +21,11 @@  host-objdirs += $(foreach f,$(host-cmulti),                  \
 
 host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
 
-__hostprogs     := $(addprefix $(obj),$(__hostprogs))
-host-csingle	:= $(addprefix $(obj),$(host-csingle))
-host-cmulti	:= $(addprefix $(obj),$(host-cmulti))
-host-cobjs	:= $(addprefix $(obj),$(host-cobjs))
-host-objdirs    := $(addprefix $(obj),$(host-objdirs))
+__hostprogs     := $(addprefix $(obj)/,$(__hostprogs))
+host-csingle	:= $(addprefix $(obj)/,$(host-csingle))
+host-cmulti	:= $(addprefix $(obj)/,$(host-cmulti))
+host-cobjs	:= $(addprefix $(obj)/,$(host-cobjs))
+host-objdirs    := $(addprefix $(obj)/,$(host-objdirs))
 
 obj-dirs += $(host-objdirs)
 
@@ -49,13 +49,13 @@  hostc_flags    = $(__hostc_flags)
 #####
 # Compile programs on the host
 
-$(host-csingle): $(obj)%: %.c
+$(host-csingle): $(obj)/%: $(src)/%.c
 	$(HOSTCC) $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) $(HOSTLDFLAGS) $(HOSTCFLAGS_$(@F)) $(HOSTCFLAGS_$(BCURDIR)) -o $@ $<
 
-$(host-cmulti): $(obj)%: $(host-cobjs)
-	$(HOSTCC) $(HOSTLDFLAGS) -o $@ $(addprefix $(obj),$($(@F)-objs)) $(HOSTLOADLIBES_$(@F))
+$(host-cmulti): $(obj)/%: $(host-cobjs)
+	$(HOSTCC) $(HOSTLDFLAGS) -o $@ $(addprefix $(obj)/,$($(@F)-objs)) $(HOSTLOADLIBES_$(@F))
 
-$(host-cobjs): $(obj)%.o: %.c
+$(host-cobjs): $(obj)/%.o: $(src)/%.c
 	$(HOSTCC) $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) $(HOSTCFLAGS_$(@F)) $(HOSTCFLAGS_$(BCURDIR)) -o $@ $< -c
 
 targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)
diff --git a/spl/Makefile b/spl/Makefile
index 798c9f3..cce6165 100644
--- a/spl/Makefile
+++ b/spl/Makefile
@@ -14,6 +14,11 @@ 
 # Based on top-level Makefile.
 #
 
+src := $(obj)
+
+# Create output directory if not already present
+_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
+
 CONFIG_SPL_BUILD := y
 export CONFIG_SPL_BUILD
 
@@ -37,14 +42,6 @@  include $(srctree)/scripts/Kbuild.include
 
 include $(TOPDIR)/config.mk
 
-# We want the final binaries in this directory
-ifeq ($(CONFIG_TPL_BUILD),y)
-obj := $(OBJTREE)/tpl/
-SPLTREE := $(TPLTREE)
-else
-obj := $(OBJTREE)/spl/
-endif
-
 HAVE_VENDOR_COMMON_LIB = $(if $(wildcard $(SRCTREE)/board/$(VENDOR)/common/Makefile),y,n)
 
 ifdef	CONFIG_SPL_START_S_PATH
@@ -109,11 +106,13 @@  PLATFORM_LIBGCC = $(SPLTREE)/arch/$(ARCH)/lib/libgcc.o
 PLATFORM_LIBS := $(filter-out %/libgcc.o, $(filter-out -lgcc, $(PLATFORM_LIBS))) $(PLATFORM_LIBGCC)
 endif
 
-START := $(addprefix $(SPLTREE)/,$(head-y))
-LIBS := $(addprefix $(SPLTREE)/,$(sort $(LIBS-y)))
+LIBS-y := $(sort $(LIBS-y))
+
+__START := $(head-y)
+__LIBS := $(LIBS-y)
 
-__START := $(subst $(obj),,$(START))
-__LIBS := $(subst $(obj),,$(LIBS))
+START := $(addprefix $(obj)/,$(head-y))
+LIBS := $(addprefix $(obj)/,$(LIBS-y))
 
 # Linker Script
 ifdef CONFIG_SPL_LDSCRIPT
@@ -144,36 +143,36 @@  LDPPFLAGS += \
 	$(shell $(LD) --version | \
 	  sed -ne 's/GNU ld version \([0-9][0-9]*\)\.\([0-9][0-9]*\).*/-DLD_MAJOR=\1 -DLD_MINOR=\2/p')
 
-$(OBJTREE)/MLO:	$(obj)u-boot-spl.bin
+$(OBJTREE)/MLO:	$(obj)/u-boot-spl.bin
 	$(OBJTREE)/tools/mkimage -T omapimage \
 		-a $(CONFIG_SPL_TEXT_BASE) -d $< $@
 
-$(OBJTREE)/MLO.byteswap: $(obj)u-boot-spl.bin
+$(OBJTREE)/MLO.byteswap: $(obj)/u-boot-spl.bin
 	$(OBJTREE)/tools/mkimage -T omapimage -n byteswap \
 		-a $(CONFIG_SPL_TEXT_BASE) -d $< $@
 
-$(OBJTREE)/SPL : $(obj)u-boot-spl.bin depend
-		$(MAKE) $(build) $(SRCTREE)/arch/arm/imx-common $@
+$(objtree)/SPL : $(obj)/u-boot-spl.bin depend
+		$(MAKE) $(build)=spl/arch/arm/imx-common $@
 
-ALL-y	+= $(obj)$(SPL_BIN).bin
+ALL-y	+= $(obj)/$(SPL_BIN).bin
 
 ifdef CONFIG_SAMSUNG
-ALL-y	+= $(obj)$(BOARD)-spl.bin
+ALL-y	+= $(obj)/$(BOARD)-spl.bin
 endif
 
 all:	$(ALL-y)
 
 ifdef CONFIG_SAMSUNG
-$(obj)$(BOARD)-spl.bin: $(obj)u-boot-spl.bin
+$(obj)/$(BOARD)-spl.bin: $(obj)/u-boot-spl.bin
 	$(if $(wildcard $(OBJTREE)/spl/board/samsung/$(BOARD)/tools/mk$(BOARD)spl),\
 	$(OBJTREE)/spl/board/samsung/$(BOARD)/tools/mk$(BOARD)spl,\
 	$(OBJTREE)/tools/mkexynosspl) $< $@
 endif
 
-$(obj)$(SPL_BIN).bin:	$(obj)$(SPL_BIN)
+$(obj)/$(SPL_BIN).bin:	$(obj)/$(SPL_BIN)
 	$(OBJCOPY) $(OBJCFLAGS) -O binary $< $@
 
-LDFLAGS_$(SPL_BIN) += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
+LDFLAGS_$(SPL_BIN) += -T u-boot-spl.lds $(LDFLAGS_FINAL)
 ifneq ($(CONFIG_SPL_TEXT_BASE),)
 LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
 endif
@@ -183,19 +182,19 @@  GEN_UBOOT = \
 		--start-group $(__LIBS) --end-group $(PLATFORM_LIBS) \
 		-Map $(SPL_BIN).map -o $(SPL_BIN)
 
-$(obj)$(SPL_BIN):	depend $(START) $(LIBS) $(obj)u-boot-spl.lds
+$(obj)/$(SPL_BIN):	depend $(START) $(LIBS) $(obj)/u-boot-spl.lds
 	$(GEN_UBOOT)
 
 $(START):
 	@:
 
 $(LIBS):	depend
-	$(MAKE) $(build) $(SRCTREE)$(dir $(subst $(SPLTREE),,$@))
+	$(MAKE) $(build)=$(patsubst %/,%,$(dir $@))
 
-$(obj)u-boot-spl.lds: $(LDSCRIPT) depend
+$(obj)/u-boot-spl.lds: $(LDSCRIPT) depend
 	$(CPP) $(CPPFLAGS) $(LDPPFLAGS) -I$(obj). -ansi -D__ASSEMBLY__ -P - < $< > $@
 
-depend:	$(obj).depend
+depend:	$(obj)/.depend
 .PHONY: depend
 
 # defines $(obj).depend target
diff --git a/tools/Makefile b/tools/Makefile
index 3c186ba..fe4a6c7 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -140,8 +140,8 @@  HOSTCFLAGS_sha1.o := -pedantic
 always := $(hostprogs-y)
 
 # Generated LCD/video logo
-LOGO_H = $(OBJTREE)/include/bmp_logo.h
-LOGO_DATA_H = $(OBJTREE)/include/bmp_logo_data.h
+LOGO_H = $(objtree)/include/bmp_logo.h
+LOGO_DATA_H = $(objtree)/include/bmp_logo_data.h
 LOGO-$(CONFIG_LCD_LOGO) += $(LOGO_H)
 LOGO-$(CONFIG_LCD_LOGO) += $(LOGO_DATA_H)
 LOGO-$(CONFIG_VIDEO_LOGO) += $(LOGO_H)
@@ -149,14 +149,14 @@  LOGO-$(CONFIG_VIDEO_LOGO) += $(LOGO_DATA_H)
 
 # Generic logo
 ifeq ($(LOGO_BMP),)
-LOGO_BMP= logos/denx.bmp
+LOGO_BMP= $(srctree)/$(src)/logos/denx.bmp
 
 # Use board logo and fallback to vendor
 ifneq ($(wildcard logos/$(BOARD).bmp),)
-LOGO_BMP= logos/$(BOARD).bmp
+LOGO_BMP= $(srctree)/$(src)/logos/$(BOARD).bmp
 else
 ifneq ($(wildcard logos/$(VENDOR).bmp),)
-LOGO_BMP= logos/$(VENDOR).bmp
+LOGO_BMP= $(srctree)/$(src)/logos/$(VENDOR).bmp
 endif
 endif
 
@@ -185,8 +185,8 @@  all:	$(LOGO-y)
 
 subdir-y := kernel-doc
 
-$(LOGO_H):	$(obj)bmp_logo $(LOGO_BMP)
-	$(obj)./bmp_logo --gen-info $(LOGO_BMP) > $@
+$(LOGO_H):	$(obj)/bmp_logo $(LOGO_BMP)
+	$(obj)/bmp_logo --gen-info $(LOGO_BMP) > $@
 
-$(LOGO_DATA_H):	$(obj)bmp_logo $(LOGO_BMP)
-	$(obj)./bmp_logo --gen-data $(LOGO_BMP) > $@
+$(LOGO_DATA_H):	$(obj)/bmp_logo $(LOGO_BMP)
+	$(obj)/bmp_logo --gen-data $(LOGO_BMP) > $@