Build with:
cross build --target armv5te-unknown-linux-gnueabi --release
Set the initial s/n on openbmc emulator:
busctl set-property xyz.openbmc_project.Inventory.Manager /xyz/openbmc_project/inventory/system xyz.openbmc_project.Inventory.Decorator.AssetTag AssetTag s "12345"
Get the s/n on openbmc emulator
busctl get-property xyz.openbmc_project.Inventory.Manager /xyz/openbmc_project/inventory/system xyz.openbmc_project.Inventory.Decorator.AssetTag AssetTag