Masahiro Yamada 9e4140329e 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>		2014-02-19 11:07:50 -05:00
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bootm.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
cmd_boot.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
gcc.c	x86: Support tracing function	2013-06-26 10:18:56 -04:00
init_helpers.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
interrupts.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
Makefile	kbuild: change out-of-tree build	2014-02-19 11:07:50 -05:00
pcat_interrupts.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
pcat_timer.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
pci_type1.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
physmem.c	x86: Declare global_data pointer when it is used	2013-05-13 13:33:20 -07:00
relocate.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
string.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
tsc_timer.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
video.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
zimage.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00