Re: [poky] Warning: empty_var_volatile doesn't exist

["Peter Kjellerstedt" <peter.kjellerstedt@axis.com>]

> -----Original Message-----
> From: poky@lists.yoctoproject.org <poky@lists.yoctoproject.org> On Behalf
> Of Steve
> Sent: den 27 oktober 2021 10:42
> To: poky@lists.yoctoproject.org
> Subject: [poky] Warning: empty_var_volatile doesn't exist
> 
> Hello,
> 
> I would like to remove /etc/timestamp from my rootfs.
> I found it is set by "rootfs_update_timestamp" as part of
> ROOTFS_POSTPROCESS_COMMAND.
> 
> I did in my image recipe the following:
> ROOTFS_POSTPROCESS_COMMAND_remove = "rootfs_update_timestamp ; "

That should be:

ROOTFS_POSTPROCESS_COMMAND_remove = "rootfs_update_timestamp;"

The _remove operator will remove each word specified from the original 
variable. So in your case it would remove all "rootfs_update_timestamp" 
and all ";", which is not what you want.
> 
> That seems to work, no /etc/timestamp in image.
> But I get the warning from do_rootfs:
> "Function write_image_test_data  empty_var_volatile doesn't exist"
> 
> Did I do something wrong? I am not feeling well to ignore warnings,
> especially as I am a beginner here.
> 
> Maybe allow me a second question:
> I need a part of utils-linux, but won't include all the files (due to
> space limitations).
> I guess I need some utils-linux_%.bbappend - but what has to be in there?
> 
> Thanks, Arno (in Yocto 3.0 atm)
> 

//Peter