From 9e4140329ee9a787d0f96ac2829d618d47f7973f Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Tue, 4 Feb 2014 17:24:24 +0900 Subject: 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 " 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=" syntax for descending into sub-directories. (We can write it like "make $(obj)=" with a shorthand.) This means the current working directory is always the top of the output directory. Signed-off-by: Masahiro Yamada Tested-by: Gerhard Sittig --- 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 +- 6 files changed, 6 insertions(+), 6 deletions(-) (limited to 'arch/arm/cpu/armv7') 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 -- cgit v1.1