RDK Extender profile is a Yocto based RDK miniature build with opensource OpenSync agent
OpenSync agent is cloud agnostic and it forms mesh orchestrated by Plume cloud
RPI4 target is chosen for extender profile since this target is chip and widely available
Two external Wi-Fi dongles are used for 2.4GHz and 5GHz radio support
OpenSync's minimum requirement on the WiFi radio is the support for 2AP and 1 Station interface
Conceptually, RPI4 extender can be used with different Gateway devices(which has OpenSync agent). But currently validated with TurrisOmnia RDKB GW
Prerequisite: Need to contact Plume to acquiring TLS certificate and backhaul credential

Benefits of Kirkstone:

Components where security fixes are added :- binutils, curl, epiphany, expat, ffmpeg, gcc, glibc, gmp, go, grub2, gzip, libarchive, libxml2, libxslt, lighttpd, linux-yocto, amdgpu, lua, openssl, qemu , rpm , seatd , speex , squashfs-tools , systemd , tiff , unzip , vim , virglrenderer , webkitgtk , xz , zlib
There are 318 opensource component version upgrades

Major opensource upgrades (Dunfell → Kirkstone) are :- GCC (9.3 → 11.3) , glibc (2.31 → 2.35) , glib-2.0 (2.62.4 → 2.72.3), systemd (244.3 → 250.5) , busybox (1.31.1 → 1.35.0)
Netflix upgrade, youtube
GCC compiler
Maintainability - Dunfell 4 years ; Kirkstone 2 years ; CVE Dunfell is sill open (Refer Yocto mailing list), Upstream dunfell 3.1.24 has open CVE
Build time - reduce number of default dependency (make build faster in first/second time)
meta-rust is in core
software bill of material (security infrastructure)
share state - c standard. faster sstsate performance due to decompression standard cstd (twice faster than xz)
license management tool improvement (more accurate license compliance)
Kirkstone need minimum 4.x kernel (refer systemd)
linux_kernel_header does not mandate

Host Setup

For Host SetUp details refer this link - How to Build#SettinguptheHostEnvironment

...