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/mips/cpu/mips32/config.mk | 2 +- arch/mips/cpu/mips64/config.mk | 2 +- arch/mips/cpu/xburst/config.mk | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/mips') diff --git a/arch/mips/cpu/mips32/config.mk b/arch/mips/cpu/mips32/config.mk index 067f871525..7ee7faae8f 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 d1a8b2c7aa..02113a1f09 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 d81da21017..00b0fd9c9c 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 -- cgit