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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/avionic-design
parentd958002589cb724907e8d4360d546403d1e6b7d8 (diff)
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/avionic-design')
-rw-r--r--board/avionic-design/medcom-wide/Makefile2
-rw-r--r--board/avionic-design/plutux/Makefile2
-rw-r--r--board/avionic-design/tec-ng/Makefile2
-rw-r--r--board/avionic-design/tec/Makefile2
4 files changed, 4 insertions, 4 deletions
diff --git a/board/avionic-design/medcom-wide/Makefile b/board/avionic-design/medcom-wide/Makefile
index 87e19123b0..bcf7ccfe2a 100644
--- a/board/avionic-design/medcom-wide/Makefile
+++ b/board/avionic-design/medcom-wide/Makefile
@@ -9,4 +9,4 @@
obj-y := ../common/tamonten.o
-include ../../nvidia/common/common.mk
+include $(srctree)/board/nvidia/common/common.mk
diff --git a/board/avionic-design/plutux/Makefile b/board/avionic-design/plutux/Makefile
index 87e19123b0..bcf7ccfe2a 100644
--- a/board/avionic-design/plutux/Makefile
+++ b/board/avionic-design/plutux/Makefile
@@ -9,4 +9,4 @@
obj-y := ../common/tamonten.o
-include ../../nvidia/common/common.mk
+include $(srctree)/board/nvidia/common/common.mk
diff --git a/board/avionic-design/tec-ng/Makefile b/board/avionic-design/tec-ng/Makefile
index 79d8602626..a556b92e8e 100644
--- a/board/avionic-design/tec-ng/Makefile
+++ b/board/avionic-design/tec-ng/Makefile
@@ -7,4 +7,4 @@
obj-y := ../common/tamonten-ng.o
-include ../../nvidia/common/common.mk
+include $(srctree)/board/nvidia/common/common.mk
diff --git a/board/avionic-design/tec/Makefile b/board/avionic-design/tec/Makefile
index 87e19123b0..bcf7ccfe2a 100644
--- a/board/avionic-design/tec/Makefile
+++ b/board/avionic-design/tec/Makefile
@@ -9,4 +9,4 @@
obj-y := ../common/tamonten.o
-include ../../nvidia/common/common.mk
+include $(srctree)/board/nvidia/common/common.mk