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| 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 /tools/Makefile | |
| 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 'tools/Makefile')
| -rw-r--r-- | tools/Makefile | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/tools/Makefile b/tools/Makefile index 21341b7..9b19dcb 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -142,8 +142,8 @@ 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) += $(LOGO_H) @@ -151,14 +151,14 @@ LOGO-$(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 @@ -187,8 +187,8 @@ 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) > $@ |