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# kernelconfigのdiff(fragment.cfg)を作成
$ bitbake linux-raspberrypi -c diffconfig 

#自作レイヤを作成し、fragment.cfgを自作レイヤ(meta-custom)にコピー
$ mkdir -p meta-custom/recipes-kernel/linux/
$ cp hogehoge/fragment.cfg meta-custom/recipes-kernel/linux/

# bappendを作成
$ touch meta-custom/recipes-kernel/linux/linux-raspberrypi_%.bbappend

# bbappendに下記を記述
FILESEXTRAPATHS:prepend := "${THISDIR}:"
SRC_URI:append = "file://fragment.cfg"
