Yocto how do you add meta-networking layer to your config?

Question

I am trying to look at the https://layers.openembedded.org/layerindex/branch/dunfell/layers/ and add dhcp and dnsmasq to my image. My local.conf has the following line: CORE_IMAGE_EXTRA_INSTALL_append = " dhcpcd dnsmasq openssh iptables"

However, the bitbake fails with error ERROR: Nothing RPROVIDES 'dhcpcd' Layer index: https://layers.openembedded.org/layerindex/branch/dunfell/recipes/?q=dhcp ; shows multiple entries including one in openembedded-core which I believe is the meta default layer. In my pc, poky/meta shows:

classes
conf
COPYING.MIT
files
lib
recipes-bsp
recipes-connectivity
recipes-core
recipes-devtools
recipes-extended
recipes-gnome
recipes-graphics
recipes-kernel
recipes-multimedia
recipes-rt
recipes-sato
recipes-support
recipes.txt
site

Recipes-connectivity lists:

avahi
bind
bluez5
connman
dhcp
inetutils
iproute2
iw
libnss-mdns
libpcap
mobile-broadband-provider-info
neard
nfs-utils
ofono
openssh
openssl
ppp
ppp-dialin
resolvconf
socat
ssh-pregen-hostkeys
wpa-supplicant

I found the following files of importance:

dhcp/files/dhcpd.conf
dhcp/dhcp.inc
dhcp/dhcp_4.4.2.bb

Surprisingly dhcp-client in place of dhcpcd seems to work which makes no sense as there is no recipe file name with dhcp-server_...bb Looks like my yocto should find the dhcp. So why is it failing?

Answer 1

You are using the good tools, dhcpd is indeed present in openembedded-core, but this meta is not the default one (poky/meta) !

This meta-networking is from the parent meta meta-openembedded.

You can find it on GitHub (dunfell branch).

The recipe is in meta-networking/recipes-connectivity/dhcpcd.

You can see it on the recipe description on Openembedded Layer index

You need to clone this meta and add it your setup (gbitbake-layers or manually)

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You can use bitbake-layers to add/remove/create layers.

To add a layer:

bitbake-layers add-layer <path>

To show layers used:

bitbake-layers show-layers

You will find more help in the Yocto development manual

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You can also modify manually your <builddir>/conf/bblayers.conf file to add the path of your layer you want to add.