====== Yocto tips and tricks ======

===== resources =====

Un doc donnant les usages habituels de yocto : {{ :francois:boulot:l-813e_1.pdf |Working with Poky and Bitbake}}

===== Bitbake =====

^ Command ^ Description ^
|''hob'' | bitbake frontend/GUI.|
|''bitbake-layers show-recipes "*-image-*"'' | Show possible images to bake. Without "*-images-*", it shows ALL recipes|
|''bitbake-layers show-layers'' | Show layers |
|''bitbake –v <image> 2>&1'' | tee image_build.log 	Print (on console) and store verbose baking|
|''bitbake virtual/kernel -c menuconfig''| Interactive kernel configuration|
|''bitbake <package> -c  devshell''| Open a new shell where with neccesary system values already defined for package|
|''bitbake <package> -c listtasks''| List all tasks for package|
|''bitbake <package> -c <task>''| Execute a particular package's task. Default Tasks names: fetch, unpack, patch, configure, compile, install, package, package_write, and build.|
|''bitbake <image> -c fetchall'' | Fetch sources for a particular image|
|''bitbake <image>'' | Bake an image (add -k to continue building even errors are found in the tasks execution)|
|''bitbake <image > -g -u depexp'' | Show the package dependency for image.|
|''%%bitbake -s | grep <pkg>%%''| Check if certain package is present on current Yocto Setup|
|''%%bitbake -g <pkg> && cat pn-depends.dot | grep -v -e '-native' | grep -v digraph | grep -v -e '-image' | awk '{print $1}' | sort | uniq%%''|Show package's dependencies|
|''%%bitbake -g <image> && cat pn-depends.dot | grep -v -e '-native' | grep -v digraph | grep -v -e '-image' | awk '{print $1}' | sort | uniq%%''|Show image's packages|

**Example:** To show all packages included on fsl-image-gui
  $ bitbake fsl-image-gui -g -u depexp

> Note: This command will open a UI window, so it must be execute on a console inside the host machine (either virtual or native).

**Example:** To (force) compiling a kernel and then build, type:
  $ bitbake  linux-imx -f -c compile
  $ bitbake linux-imx
  
===== Création du SDK =====

  bitbake <image> ‐c populate_sdk