1.3 KiB
1.3 KiB
Layer
A layer is a bundle of configuration files.
It can contain:
- Recipes to build specific software
- Machines
- Distributions
- Classes
- Images
- ...
Layer list
Layers are listed in $POKY/build/conf/bblayers.conf
using absolute path:
BBLAYERS = " \
/home/me/poky/meta \
/home/me/poky/meta-yocto \
/home/me/poky/meta-yocto-bsp \
/home/me/poky/build/meta-ab3000 \
"
The layer can be in another directory than under `$POKY`.
Don't forget to add any newly created layer in this list to use it
Generally this folder is versioned (with git).
The layers shipped with Yocto are in $POKY/meta*
.
Layer configuration
Minimal configuration:
BBPATH .= ":${LAYERDIR}"
BBFILES += "${LAYERDIR}/recipes-*/*/*.bb \
${LAYERDIR}/recipes-*/*/*.bbappend"
BBFILE_COLLECTIONS += "ab3000"
BBFILE_PATTERN_ab3000 = "^${LAYERDIR}/"
BBFILE_PRIORITY_ab3000 = "6"
Variable | Use |
---|---|
BBFILES |
Where to search for recipes & recipe append files (ie recipes-group/recipename/recipename.bb ) |
BBFILE_COLLECTIONS |
Layer name. Will be used to get/set variables only for this layer (ie VAR_ab3000 ) |