Re: [PATCH] gen_initramfs.sh: use 'date -u' to get Timestamp

[GangYan <gang.yan@linux.dev>]

> On Mon, Oct 13, 2025 at 12:28:08PM +0200, Matthieu Baerts wrote:
> Hi Gang,
> 
> On 13/10/2025 12:19, Gang Yan wrote:
> > There exists a compilation error in the latest version of
> > mptcp-upstream-virtme-docker:latest:
> > '''
> > 	ERROR: Timestamp out of range for cpio format
> > 	make[4]: *** [<KERNEL_SRC>/usr/Makefile:76:
> > '''
> > 
> > The reason is the output of 'date -d0' is 'Sat Jan 1 00:00:00 UTC 0000'.
> > After using 'date -u', the output is correct.
> 
> Thank you for having looked at this. I already sent a fix in
> mptcp-upstream-virtme-docker:
> 
> 
> https://github.com/multipath-tcp/mptcp-upstream-virtme-docker/commit/52aa674
> 
This fix works well in my enviroment.

Thanks,
Gang
> The issue is in fact in Rust CoreUtils:
> 
>   https://github.com/uutils/coreutils/issues/8898
> 
> 
> Then, I don't think we need to modify the kernel source. Here are a few
> workarounds:
> 
> - Use date's GNU version: ln -sf gnudate /usr/bin/date
> 
> - Do not generate the initramfs if not needed: -d CONFIG_BLK_DEV_INITRD
> 
> - Set KBUILD_BUILD_TIMESTAMP to "-1"
> 
> WDYT?
> 
> Cheers,
> Matt
> -- 
> Sponsored by the NGI0 Core fund.
> 
>