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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 /MAKEALL
parentd958002589cb724907e8d4360d546403d1e6b7d8 (diff)
downloadblackbird-obmc-uboot-9e4140329ee9a787d0f96ac2829d618d47f7973f.tar.gz
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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 $(obj)=<sub-dir>" with a shorthand.) This means the current working directory is always the top of the output directory. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Tested-by: Gerhard Sittig <gsi@denx.de>
Diffstat (limited to 'MAKEALL')
-rwxr-xr-xMAKEALL6
1 files changed, 4 insertions, 2 deletions
diff --git a/MAKEALL b/MAKEALL
index 54b0d893a6..d7ad51dc44 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -674,8 +674,6 @@ build_target() {
output_dir="${OUTPUT_PREFIX}"
fi
- export BUILD_DIR="${output_dir}"
-
target_arch=$(get_target_arch ${target})
eval cross_toolchain=\$CROSS_COMPILE_`echo $target_arch | tr '[:lower:]' '[:upper:]'`
if [ "${cross_toolchain}" ] ; then
@@ -686,6 +684,10 @@ build_target() {
MAKE=make
fi
+ if [ "${output_dir}" != "." ] ; then
+ MAKE="${MAKE} O=${output_dir}"
+ fi
+
${MAKE} distclean >/dev/null
${MAKE} -s ${target}_config
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