We provided Fenix for you to build the Ubuntu OS images easily. You can follow the steps bellow to build U-Boot.

Choose your board (e.g. VIM4), U-Boot version, Linux version, system version, etc.

source setenv.sh

Choose the correct version for your requirements.

Build U-Boot with a single command:

make uboot

The binaries are located in build/u-boot/fip/_tmp. You'll need u-boot.bin.sd.bin.signed', u-boot.bin.signed, and u-boot.bin.spi.bin.signed. * u-boot.bin.sd.bin.signed - for burning to the SD card * u-boot.bin.signed - for burning to the eMMC * u-boot.bin.spi.bin.signed - for burning to the SPI Flash ==== Build U-Boot Debian package ==== You can also choose the Debian U-Boot package: ```sh make uboot-deb ``` Debian packages are located in build/images/debs/{VERSION}/{BOARD}. VERSION : refers to the Fenix version, e.g. `1.0.11` BOARD : refers to the Khadas SBC, e.g. `VIM4` The folder location is build/images/debs/1.0.11/VIM4, and the Debian U-Boot package is linux-u-boot-xxx-xxx_xxx-xxx_arm64.deb''.

• SoC Vendor Debian U-Boot package: `linux-u-boot-vim4-vendor_1.0.11-2019.01_arm64.deb`

U-Boot for VIM4 is hosted on u-boot