§2023-08-23

[Build U-boot])https://u-boot.readthedocs.io/en/latest/build/index.html)

¶1.0 Obtaining the source

alexlai@hc4Bookworm:~/build$ pwd
/home/alexlai/build
$ git clone https://source.denx.de/u-boot/u-boot.git
alexlai@SurfacePro:~/build$ mv u-boot/ Das-u-boot
alexlai@SurfacePro:~/build$ cd Das-u-boot/
alexlai@SurfacePro:~/build/Das-u-boot$ git checkout v2023.07.02 -b v2023.07.02
Switched to a new branch 'v2023.07.02'
# The released versions are available as tags which use the naming scheme:
# v<year>.<month>
$ git checkout v2023.07.02 -b v2023.07.02
Switched to a new branch 'v2023.07.02'

¶2. Debian based¶

On Debian based systems the cross compiler packages are named gcc--linux-gnu.

You could install GCC and the GCC cross compiler for the ARMv8 architecture with sudo apt-get install gcc gcc-aarch64-linux-gnu for cross compiling.

$ sudo apt-get install gcc gcc-aarch64-linux-gnu
alexlai@SurfacePro:~$ aarch64-linux-gnu-gcc --version
aarch64-linux-gnu-gcc (Ubuntu 12.2.0-3ubuntu1) 12.2.0
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ sudo apt install bison flex
``

&para;3. make menuconfig (for odroid-hc4)

$ export CROSS_COMPILE=aarch64-linux-gnu- $ make odroid-hc4_defconfig

configuration written to .config

$ make $ ls Kbuild Makefile arch cmd disk env lib scripts u-boot-dtb.bin u-boot.bin u-boot.lds Kconfig README bin common doc examples net test u-boot-elf.lds u-boot.cfg u-boot.map Licenses System.map board config.mk drivers fs post tools u-boot-elf.o u-boot.dtb u-boot.srec MAINTAINERS api boot configs dts include py u-boot u-boot-nodtb.bin u-boot.elf u-boot.sym