Minimal Rootfs

How to create minimal roots using Yocto Project. It is useful in silicon bringup.

There are multiple libc providers

• GNU glibc

• musl

• ulibc

glibc + devmem + insmod

MACHINE = "versal-net-generic"
#TCLIBC = "musl"
VIRTUAL-RUNTIME_dev_manager = "busybox-mdev"
VIRTUAL-RUNTIME_login_manager = "busybox"
VIRTUAL-RUNTIME_init_manager = "busybox"
VIRTUAL-RUNTIME_initscripts = "initscripts"
VIRTUAL-RUNTIME_keymaps = "keymaps"
#INIT_MANAGER = "sysvinit"

EXTRA_IMAGDEPENDS:remove = "virtual/plm"
IMAGE_INSTALL:remove = "plm-firmware psm-firmware"
#IMAGE_INSTALL:append = " kernel-modules"
IMAGE_FSTYPES:remove = "wic.qemu-sd"

DISTRO_FEATURES_BACKFILL_CONSIDERED:append = " systemd sysvinit"

change TLIBC to use different versions

bitbake core-image-minimal