range Pi User Manual Copyright reserved by Shenzhen Xunlong Software Co., Ltd
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2) The image URL of the cross-compilation toolchain in China is the open source
software image site of Tsinghua University
https://mirrors.tuna.tsinghua.edu.cn/armbian-releases/_toolchain/
3) After toolchains is downloaded, it will contain multiple versions of cross-compilation
toolchains, and the development board will only use two of them
test@test:~/orangepi-build$ ls toolchains/
gcc-arm-11.2-2022.02-x86_64-aarch64-none-linux-gnu
gcc-arm-11.2-2022.02-x86_64-arm-none-linux-gnueabihf
gcc-arm-9.2-2019.12-x86_64-aarch64-none-linux-gnu
gcc-arm-9.2-2019.12-x86_64-arm-none-linux-gnueabihf
gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi
gcc-linaro-5.5.0-2017.10-x86_64_arm-linux-gnueabihf
gcc-linaro-7.4.1-2019.02-x86_64_aarch64-linux-gnu
gcc-linaro-7.4.1-2019.02-x86_64_arm-linux-gnueabi
gcc-linaro-aarch64-none-elf-4.8-2013.11_linux
gcc-linaro-arm-linux-gnueabihf-4.8-2014.04_linux
gcc-linaro-arm-none-eabi-4.8-2014.04_linux
4) The cross-compilation toolchain used to compile the Linux kernel source code is
a. Linux5.10
gcc-arm-11.2-2022.02-x86_64-aarch64-none-linux-gnu