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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 /doc/DocBook | |
| parent | d958002589cb724907e8d4360d546403d1e6b7d8 (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 'doc/DocBook')
| -rw-r--r-- | doc/DocBook/Makefile | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/doc/DocBook/Makefile b/doc/DocBook/Makefile index 29b79d7cd11..aa7c44b127c 100644 --- a/doc/DocBook/Makefile +++ b/doc/DocBook/Makefile @@ -6,8 +6,6 @@ # To add a new book the only step required is to add the book to the # list of DOCBOOKS. -include $(TOPDIR)/config.mk - DOCBOOKS := fs.xml linker_lists.xml stdio.xml ### @@ -122,7 +120,7 @@ quiet_cmd_db2pdf = PDF $@ index = index.html -main_idx = $(index) +main_idx = doc/DocBook/$(index) build_main_index = rm -rf $(main_idx); \ echo '<h1>U-Boot Bootloader HTML Documentation</h1>' >> $(main_idx) && \ echo '<h2>U-Boot Version: $(U_BOOT_VERSION)</h2>' >> $(main_idx) && \ @@ -151,7 +149,7 @@ quiet_cmd_db2man = MAN $@ @(which xmlto > /dev/null 2>&1) || \ (echo "*** You need to install xmlto ***"; \ exit 1) - $(Q)mkdir -p $(obj)man + $(Q)mkdir -p $(obj)/man $(call cmd_db2man) @touch $@ |