This custom u-boot version has applied patch:

• https://github.com/aodzip/buildroot-tiny200/blob/master/board/allwinner/suniv-f1c100s/patch/u-boot/0001-v2020.07.11.patch

Other significant changes are from (starting from most recent):

• tiopex: https://github.com/MiyooCFW/uboot/commit/e58568e0e
• gameblabla: https://github.com/bittboy/uboot/commit/ad2bbd7
• steward-fu: https://github.com/MiyooCFW/uboot/commit/67e0b15

Usually you have to be the root user.

• grab source & cd:

git clone https://github.com/MiyooCFW/uboot
cd uboot

• set environment variables for e.g.:

export PATH=$PATH:/opt/miyoo/bin
export ARCH=arm
export CROSS_COMPILE=arm-miyoo-linux-uclibcgnueabi-

• write configuration

make miyoo_defconfig

• build

make

• edit configuration if needed & rebuild

make menuconfig
make clean
make

• grab output u-boot binary & move to ./dist:

mkdir -p dist
mv dist/u-boot-sunxi-with-spl.bin

If you have a multicore CPU, you can increase build speed with:

make -j ${YOUR_CPU_COUNT}