atmark@atde9:~/build-rootfs-v3.21-at.2$ sudo ./build_image.sh --board a600 --boot ~/u-boot-2020.04-at25/u-boot-dtb.imx --installer ./baseos-600-3.21.3-at.2.20250306.img
use default(outdir=/home/atmark/build-rootfs-v3.21-at.2)
use default(output=baseos-600-3.21.3-at.2.20250306-installer.img)
Warning: Partition table header claims that the size of partition table
entries is 0 bytes, but this program  supports only 128-byte entries.
Adjusting accordingly, but partition table may be garbage.
Warning: Partition table header claims that the size of partition table
entries is 0 bytes, but this program  supports only 128-byte entries.
Adjusting accordingly, but partition table may be garbage.
Creating new GPT entries in memory.
Warning: The kernel is still using the old partition table.
The new table will be used at the next reboot or after you
run partprobe(8) or kpartx(8)
GPT data structures destroyed! You may now partition the disk using fdisk or
other utilities.
Setting name!
partNum is 0
Warning: The kernel is still using the old partition table.
The new table will be used at the next reboot or after you
run partprobe(8) or kpartx(8)
The operation has completed successfully.
btrfs-progs v5.10.1 
See http://btrfs.wiki.kernel.org for more information.

Label:              rootfs_0
UUID:               2fd8eefb-a65b-44a5-a6a4-3985b74f4fc2
Node size:          16384
Sector size:        4096
Filesystem size:    394.00MiB
Block group profiles:
  Data:             single            8.00MiB
  Metadata:         DUP              32.00MiB
  System:           DUP               8.00MiB
SSD detected:       no
Incompat features:  extref, skinny-metadata
Runtime features:   free-space-tree
Checksum:           crc32c
Number of devices:  1
Devices:
   ID        SIZE  PATH
    1   394.00MiB  /dev/loop0

'mnt/etc/init.d/swupdate-hawkbit' を削除しました
'mnt/etc/init.d/swupdate-url' を削除しました
Cannot read environment, using default

Successfully built /home/atmark/build-rootfs-v3.21-at.2/baseos-600-3.21.3-at.2.20250306-installer.img