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README.kconfig: document backward compatibility "make *_config"

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Commit 3ff291f371
(kconfig: convert Kconfig helper script into a shell script)
restored "<board>_config" target for backward compatibility.
It should be documented.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Masahiro Yamada
2014-08-28 10:56:55 +09:00
committed by Tom Rini
parent 2134342e57
commit d1b60d3407
2 changed files with 8 additions and 0 deletions
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7
doc/README.kconfig
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@@ -114,6 +114,13 @@ See below for how each configuration target works in U-Boot:
coalesced together with "<condition:>" prefix for each line as shown above. coalesced together with "<condition:>" prefix for each line as shown above.
This file can be used as an input of "defconfig" target. This file can be used as an input of "defconfig" target.
- <board>_config
This does not exist in Linux's Kconfig.
Prior to Kconfig, in U-Boot, "make <board>_config" was used for the
configuration. It is still supported for backward compatibility and
its behavior is the same as "make <board>_defconfig".
Migration steps to Kconfig Migration steps to Kconfig
-------------------------- --------------------------

1
scripts/multiconfig.sh
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@@ -248,6 +248,7 @@ case $target in
*_defconfig) *_defconfig)
do_board_defconfig $target;; do_board_defconfig $target;;
*_config) *_config)
# backward compatibility
do_board_defconfig ${target%_config}_defconfig;; do_board_defconfig ${target%_config}_defconfig;;
silentoldconfig) silentoldconfig)
do_silentoldconfig;; do_silentoldconfig;;