Yocto/Poky: How to remove hwclock from busybox?

I’m building a Poky-based embedded Linux distribution for a target which doesn’t have a real-time clock. System time is only set by ntpd. Therefore I don’t really need an init script which calls hwclock --hctosys during boot, and in fact I’m afraid that this might cause the system time which is set by ntpd to be overwritten with an incorrect value.

So how do I get rid of the hwclock init script? It turns out that it comes from the busybox recipe. The default recipe for busybox in Poky contains the following lines:

PACKAGES =+ "${PN}-httpd ${PN}-udhcpd ${PN}-udhcpc ${PN}-syslog ${PN}-mdev ${PN}-hwclock"
...
FILES_${PN}-hwclock = "${sysconfdir}/init.d/hwclock.sh"
...
INITSCRIPT_PACKAGES = "${PN}-httpd ${PN}-syslog ${PN}-udhcpd ${PN}-mdev ${PN}-hwclock"
...
INITSCRIPT_NAME_${PN}-hwclock = "hwclock.sh"

I have no idea how to remove all the references to hwclock from within a *.bbappend file. Is there any straightforward solution, or is it not possible from a bbappend and I have to re-write the entire recipe?

Answer

You can disable it from its defconfig file by configuring CONFIG_HWCLOCK=n located at openembedded-core/meta/recipes-core/busybox/busybox/defconfig.