kbuild: change out-of-tree build
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>
Tested-by: Gerhard Sittig <gsi@denx.de>
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-ng/Makefile b/board/avionic-design/tec-ng/Makefile
index 79d86026..a556b92 100644
--- a/board/avionic-design/tec-ng/Makefile
+++ b/board/avionic-design/tec-ng/Makefile
@@ -7,4 +7,4 @@
obj-y := ../common/tamonten-ng.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 $(srctree)/board/nvidia/common/common.mk
diff --git a/board/cray/L1/Makefile b/board/cray/L1/Makefile
index 5f6c690..6aae9fa 100644
--- a/board/cray/L1/Makefile
+++ b/board/cray/L1/Makefile
@@ -9,8 +9,8 @@
obj-y += init.o
obj-y += bootscript.o
-$(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 $< $@
diff --git a/board/h2200/Makefile b/board/h2200/Makefile
index d4fa153..e516e91 100644
--- a/board/h2200/Makefile
+++ b/board/h2200/Makefile
@@ -10,5 +10,5 @@
extra-y := h2200-header.bin
-$(obj)h2200-header.bin: $(obj)h2200-header.o
+$(obj)/h2200-header.bin: $(obj)/h2200-header.o
$(OBJCOPY) -O binary $< $@
diff --git a/board/matrix_vision/mvblm7/Makefile b/board/matrix_vision/mvblm7/Makefile
index 879d794..1bc1d61 100644
--- a/board/matrix_vision/mvblm7/Makefile
+++ b/board/matrix_vision/mvblm7/Makefile
@@ -8,5 +8,5 @@
extra-y := bootscript.img
-$(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 $< $@
diff --git a/board/matrix_vision/mvsmr/Makefile b/board/matrix_vision/mvsmr/Makefile
index b6a4f67..9454259 100644
--- a/board/matrix_vision/mvsmr/Makefile
+++ b/board/matrix_vision/mvsmr/Makefile
@@ -12,5 +12,5 @@
extra-y := bootscript.img
-$(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 += $(obj)u-boot.sha1
+ALL-y += u-boot.sha1
PLATFORM_CPPFLAGS += -DCONFIG_440=1
diff --git a/board/samsung/origen/Makefile b/board/samsung/origen/Makefile
index 31e88f4..37acba7 100644
--- a/board/samsung/origen/Makefile
+++ b/board/samsung/origen/Makefile
@@ -13,7 +13,7 @@
#
# TODO:
# Fix the root cause in tools/mkorigenspl.c and delete the following work-around
-$(obj)tools/mkorigenspl: HOSTCFLAGS:=$(filter-out -O2,$(HOSTCFLAGS))
+$(obj)/tools/mkorigenspl: HOSTCFLAGS:=$(filter-out -O2,$(HOSTCFLAGS))
else
obj-y += origen.o
endif