基本上Node.js在Openembedded上的recipes都已經寫好了，只要clone下來，並且加入IMAGE_INSTALL列表即可
brook@vista:~/projects/poky$ git clone https://github.com/imyller/meta-nodejs.git
Cloning into 'meta-nodejs'...
remote: Counting objects: 1575, done.
remote: Compressing objects: 100% (14/14), done.
remote: Total 1575 (delta 9), reused 0 (delta 0), pack-reused 1561
Receiving objects: 100% (1575/1575), 241.91 KiB | 368.00 KiB/s, done.
Resolving deltas: 100% (846/846), done.
Checking connectivity... done.
brook@vista:~/projects/poky$ . oe-init-build-env
You had no conf/local.conf file. This configuration file has therefore been
created for you with some default values. You may wish to edit it to, for
example, select a different MACHINE (target hardware). See conf/local.conf
for more information as common configuration options are commented.
You had no conf/bblayers.conf file. This configuration file has therefore been
created for you with some default values. To add additional metadata layers
into your configuration please add entries to conf/bblayers.conf.
The Yocto Project has extensive documentation about OE including a reference
manual which can be found at:
http://yoctoproject.org/documentation
For more information about OpenEmbedded see their website:
http://www.openembedded.org/
### Shell environment set up for builds. ###
You can now run 'bitbake <target>'
Common targets are:
core-image-minimal
core-image-sato
meta-toolchain
meta-ide-support
You can also run generated qemu images with a command like 'runqemu qemux86'
brook@vista:~/projects/poky/build$ vim conf/bblayers.conf
...下段說明
brook@vista:~/projects/poky/build$ vim conf/local.conf
...下段說明
brook@vista:~/projects/poky/build$ bitbake core-image-minimal
WARNING: Host distribution "Ubuntu-16.04" has not been validated with this version of the build system; you may possibly experience unexpected failures. It is recommended that you use a tested distribution.
Parsing recipes: 100% |#############################################################################################| Time: 00:00:28
Parsing of 876 .bb files complete (0 cached, 876 parsed). 1316 targets, 49 skipped, 0 masked, 0 errors.
NOTE: Resolving any missing task queue dependencies
Build Configuration:
BB_VERSION = "1.30.0"
BUILD_SYS = "x86_64-linux"
NATIVELSBSTRING = "Ubuntu-16.04"
TARGET_SYS = "i586-poky-linux"
MACHINE = "qemux86"
DISTRO = "poky"
DISTRO_VERSION = "2.1.1"
TUNE_FEATURES = "m32 i586"
TARGET_FPU = ""
meta
meta-poky
meta-yocto-bsp = "krogoth:8c69f7d56cbd496aa01ba0738675a170826a536b"
meta-nodejs = "master:848b0defe8eba6e7ffa97b66e4316c17c92be9d4"
...
brook@vista:~/projects/poky/build$ ./tmp/sysroots/x86_64-linux/usr/bin/qemu-system-i386 -nographic -kernel ./tmp/deploy/images/qemux86/bzImage-qemux86.bin -cpu qemu32 -drive file=./tmp/deploy/images/qemux86/core-image-minimal-qemux86.ext4,if=virtio,format=raw -show-cursor -usb -usbdevice tablet -vga vmware -no-reboot -m 256 -append "vga=0 uvesafb.mode_option=640x480-32 root=/dev/vda rw mem=256M ip=192.168.7.2::192.168.7.1:255.255.255.0 oprofile.timer=1 rootfstype=ext4 "
Poky (Yocto Project Reference Distro) 2.1.1 qemux86 /dev/ttyS0
qemux86 login: root
root@qemux86:~# uname -a
Linux qemux86 4.4.11-yocto-standard #1 SMP PREEMPT Sun Oct 9 19:29:24 CST 2016 i686 GNU/Linux
root@qemux86:~# echo 'console.log("hello world");' > node.js
root@qemux86:~# node node.js
hello world
conf/bblayers.conf修改的內容
BBLAYERS ?= " \
/home/brook/projects/poky/meta \
/home/brook/projects/poky/meta-poky \
/home/brook/projects/poky/meta-yocto-bsp \
${TOPDIR}/../meta-nodejs \
"
conf/local.conf修改的內容
# This sets the default machine to be qemux86 if no other machine is selected: MACHINE ??= "qemux86" CORE_IMAGE_EXTRA_INSTALL += "nodejs"
-
參考資料：
- meta-nodejs, Node.js的openembedded recipes。
- JavaScript for IoT: Blinking LED on Raspberry Pi with Node.js , Node.js的demo影片。
- 「Node.js & IoT: Zero to One」 是一本 Node.js 的入門電子書，內容定位為基礎教學，目標是介紹 Node.js 以及 Node.js + IoT 相關技術主題，每個主題都從基本觀念（Zero）開始，介紹到能撰寫簡單的程式為止（One）。不過目前只有介紹JS的基本語法。
- Addons。教你如何擴充JS，用C/C++寫一個Node.js module。
