rootfs tar with hardlinks across filesystems

[jove1]

Hello,
I don't seem to be able to create images from published ROOTFS archives.
It is impossible to extract a tar with hardlinks from /boot filesystem.

git clone https://github.com/chimera-linux/chimera-live
cd chimera-live
wget https://repo.chimera-linux.org/live/latest/chimera-linux-aarch64-ROOTFS-20250214-rpi.tar.gz
sudo ./mkimage.sh chimera-linux-aarch64-ROOTFS-20250214-rpi.tar.gz

BSD tar

Unpacking rootfs tarball...
./boot/config-6.12.13-0-rpi: Can't create 'boot/config-6.12.13-0-rpi': Invalid cross-device link
./boot/vmlinux-6.12.13-0-rpi: Can't create 'boot/vmlinux-6.12.13-0-rpi': Invalid cross-device link
./boot/dtbs/dtbs-6.12.13-0-rpi/overlays/vc4-kms-v3d-pi5.dtbo: Can't create 'boot/dtbs/dtbs-6.12.13-0-rpi/overlays/vc4-kms-v3d-pi5.dtbo': Invalid cross-device link
...
bsdtar: Error exit delayed from previous errors.
ERROR: could not extract input file: 
ERROR: could not install Chimera

GNU tar

Unpacking rootfs tarball...
tar: Ignoring unknown extended header keyword 'LIBARCHIVE.xattr.security.capability'
tar: Ignoring unknown extended header keyword 'LIBARCHIVE.xattr.security.capability'
tar: ./boot/config-6.12.13-0-rpi: Cannot hard link to ‘./usr/lib/modules/6.12.13-0-rpi/apk-dist/boot/config-6.12.13-0-rpi’: Invalid cross-device link
tar: ./boot/vmlinux-6.12.13-0-rpi: Cannot hard link to ‘./usr/lib/modules/6.12.13-0-rpi/apk-dist/boot/vmlinux-6.12.13-0-rpi’: Invalid cross-device link
tar: ./boot/dtbs/dtbs-6.12.13-0-rpi/overlays/vc4-kms-v3d-pi5.dtbo: Cannot hard link to ‘./usr/lib/modules/6.12.13-0-rpi/apk-dist/boot/dtbs/dtbs-6.12.13-0-rpi/overlays/vc4-kms-v3d-pi5.dtbo’: Invalid cross-device link
...
tar: Exiting with failure status due to previous errors
ERROR: could not extract input file: 
ERROR: could not install Chimera

[sidkshatriya]

@q66 ping for additional visibility

When installing as per https://chimera-linux.org/docs/installation/install , the chimera-bootstrap fails with similar messages as mentioned above like:

Can't create 'boot/dtbs/abcxyz': Invalid cross-device link
....
<similar messages>
....

This problem occurs with the aarch64 live iso released on 20250214 (it does not occur with the iso released 20241204). Unfortunately I can't use the older iso because apk upgrade is broken when using it like thus:

(chroot) # yes | apk upgrade
yes | apk upgrade
Upgrading critical system libraries and apk-tools:
(1/4) Purging apk-tools-cache (3.0.0_pre12-r0)
(2/4) Purging apk-tools-interactive (3.0.0_pre12-r0)
(3/4) Upgrading apk-tools (3.0.0_pre12-r0 -> 3.0.0_rc4-r2)
(4/4) Upgrading apk-tools-man (3.0.0_pre12-r0 -> 3.0.0_rc4-r2)
Executing mandoc-apropos-1.14.6-r3.trigger
Regenerating man db...
Continuing the upgrade transaction with new apk-tools:
ERROR: unable to select packages:
  libcrypto3-3.4.0-r1:
    conflicts: openssl3-libs-3.4.1-r0
               openssl3-libs-3.4.1-r0[so:libcrypto.so.3=3]
    satisfies: apk-tools-3.0.0_rc4-r2[so:libcrypto.so.3]
               ca-certificates-20241121-r1[so:libcrypto.so.3]
...
...