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authorMasahiro Yamada <yamada.m@jp.panasonic.com>2014-02-04 17:24:24 +0900
committerTom Rini <trini@ti.com>2014-02-19 11:07:50 -0500
commit9e4140329ee9a787d0f96ac2829d618d47f7973f (patch)
tree6a40432f6f6723ba9ac5309076af17aec3bc0a9b /board/cray
parentd958002589cb724907e8d4360d546403d1e6b7d8 (diff)
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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 $(obj)=<sub-dir>" with a shorthand.) This means the current working directory is always the top of the output directory. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Tested-by: Gerhard Sittig <gsi@denx.de>
Diffstat (limited to 'board/cray')
-rw-r--r--board/cray/L1/Makefile8
1 files changed, 4 insertions, 4 deletions
diff --git a/board/cray/L1/Makefile b/board/cray/L1/Makefile
index 5f6c690..6aae9fa 100644
--- a/board/cray/L1/Makefile
+++ b/board/cray/L1/Makefile
@@ -9,8 +9,8 @@ obj-y = L1.o flash.o
obj-y += init.o
obj-y += bootscript.o
-$(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 $< $@