diff options
| author | Masahiro Yamada <yamada.m@jp.panasonic.com> | 2014-02-04 17:24:24 +0900 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2014-02-19 11:07:50 -0500 |
| commit | 9e4140329ee9a787d0f96ac2829d618d47f7973f (patch) | |
| tree | 6a40432f6f6723ba9ac5309076af17aec3bc0a9b /arch/blackfin/config.mk | |
| parent | d958002589cb724907e8d4360d546403d1e6b7d8 (diff) | |
| download | u-boot-imx-9e4140329ee9a787d0f96ac2829d618d47f7973f.zip u-boot-imx-9e4140329ee9a787d0f96ac2829d618d47f7973f.tar.gz u-boot-imx-9e4140329ee9a787d0f96ac2829d618d47f7973f.tar.bz2 | |
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 $(obj)=<sub-dir>" with a shorthand.)
This means the current working directory is always the top
of the output directory.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Tested-by: Gerhard Sittig <gsi@denx.de>
Diffstat (limited to 'arch/blackfin/config.mk')
| -rw-r--r-- | arch/blackfin/config.mk | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/blackfin/config.mk b/arch/blackfin/config.mk index 73fa798..c752025 100644 --- a/arch/blackfin/config.mk +++ b/arch/blackfin/config.mk @@ -12,7 +12,7 @@ CONFIG_STANDALONE_LOAD_ADDR ?= 0x1000 -m elf32bfin ifeq ($(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 |