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README.kconfig: document backward compatibility "make *_config"
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>
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@ -114,6 +114,13 @@ See below for how each configuration target works in U-Boot:
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coalesced together with "<condition:>" prefix for each line as shown above.
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coalesced together with "<condition:>" prefix for each line as shown above.
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This file can be used as an input of "defconfig" target.
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This file can be used as an input of "defconfig" target.
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- <board>_config
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This does not exist in Linux's Kconfig.
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Prior to Kconfig, in U-Boot, "make <board>_config" was used for the
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configuration. It is still supported for backward compatibility and
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its behavior is the same as "make <board>_defconfig".
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Migration steps to Kconfig
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Migration steps to Kconfig
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--------------------------
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--------------------------
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@ -248,6 +248,7 @@ case $target in
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*_defconfig)
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*_defconfig)
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do_board_defconfig $target;;
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do_board_defconfig $target;;
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*_config)
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*_config)
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# backward compatibility
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do_board_defconfig ${target%_config}_defconfig;;
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do_board_defconfig ${target%_config}_defconfig;;
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silentoldconfig)
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silentoldconfig)
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do_silentoldconfig;;
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do_silentoldconfig;;
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