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yocto recipeの作成方法

Last updated at Posted at 2019-09-03
  • yocto-layer createでひな型作成
    →カレントディレクトリにmeta-my-recipeディレクトリが生成される
. ./pokyscripts/yocto-layer create my-recipe
Please enter the layer priority you'd like to use for the layer: 6
Would you like to have an example receipe created?(y/n) y
Please enter the name you'd like to use for your example recipe: [default example]
Would you like to have an exmple bbappend the created?(y/n): n

New layer created in meta-recipes.
  • recipe説明
SUMMARY = "hogihogi Initialization"      # recipe概要
SECTION = "hogihogi"                     # recipeが所属するセクション(一応ビルド時にチェックされる)
LICENSE = "CLOSED"                       # ライセンス名
LIC_FILES_CHKSUM = "file://COPYING;md5=ffffffffffffffffffffffff"# ファイル名+md5
PR = "r0"                                     # Recipeのリビジョン
SRC_URI = "file://hogihogi.sh"              # ソーファイル定義
#inherit systemd update-rc.d

nvngから起動するため、rcS.d配下へのシンボリックリンク生成は行わない

INITSCRIPT_NAME = "hogighogi.sh"              
INITSCRIPT_PARAMS = "start 90 S . stop 90 ."   

do_install() {                                # タスク定義(実際に実行されるタスクはbitbake -c listtasks レシピ名で確認できる)
    install -d ${D}${sysconfdir}/init.d       # do_instllはmake installを実行
    install -m 0755 ${WORKDIR}/hogihogi.sh ${D}${sysconfdir}/init.d/hoighogi.sh
}

# タスクは上書き、追加可能
# タスク間は依存関係がある
# 自作のタスクを定義可能

PACKAGES = "hogihogi-init"
FILES_${PN} = "${sysconfdir}/init.d/hogihogi.sh"
  • recipeのビルド
  1. meta-my-recipesのパスをbblayers.confのBBLATERSに追加する
  2. bitbake-layers show-layersでビルド環境レイヤーをチェックする
  3. bitbake exampleを実行
  • 既存のrecipeのビルド方法
  1. .bbを直接変更しない
  2. ddappendファイルを作成して上書き
  3. .bbappendファイルを上書きするときはレシピ名(PN)とレシピのバージョン(PV)が同じである必要がある

<参考>
https://www.slideshare.net/iwamatsu/ss-31662659
https://qiita.com/propella/items/8d861d08c95ac08136d2

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