I am trying to switch rootfs to read-only using method described on How to implement a Read-Only Rootfs (Linux) | Toradex Developer Center. As I am using Verdin iMX8M Plus, I should apply fix for alsa-state, but unfortunately it seems that content of meta-custom/recipes-bsp/alsa-state/alsa-state.bbappend is wrong:
pkg_postinst_${PN}_mx8m_tdx () {
}
pkg_postinst_ontarget_${PN}_mx8m_tdx () {
}
do_install_append_mx8
Creating this file results in following error:
ERROR: ParseError at /home/dev/oe-core/build/../layers/meta-xxx/recipes-bsp/alsa-state/alsa-state.bbappend:7: unparsed line: 'do_install_append_mx8'
ERROR: Parsing halted due to errors, see error messages above
Well, do_install_append_mx8 seems to be unfinished line. Also, previous lines (pkg_postinst...) use old override syntax that was used before Yocto 3.4 (honister), see release notes for details.
Looking at meta-toradex-nxp/recipes-bsp/alsa-state/alsa-state.bbappend for reference, I assume that my .bbappend file should look like this:
pkg_postinst:${PN}:mx8m-generic-bsp:tdx () {
}
pkg_postinst_ontarget:${PN}:mx8m-generic-bsp:tdx () {
}
As far as I understand it, it should disable (well, create empty) functions pkg_postinst and pkg_postinst_ontarget. The former one is empty in meta-toradex-nxp layer already, the latter one should be the culprit of the issue (as _ontarget task will be done after creating read-only rootfs, on target device), but those changes do not make any difference.
Also, I have no idea if there should be any changes to do_install function (as the last line of proposed file suggests) or not. It does not make any sense to me, I have no idea what could original idea behind that page in developer center be.
Environment:
- Verdin iMX8MP Q 4GB WB IT V1.1A
- Yocto layers synced today to
refs/tags/6.5.0DISTRO_VERSION = "6.5.0-devel-20240328151402+build.0"
Please advice. I have gut feeling that it is something trivial, but I am not able to figure out how I should write that .bbappend file.