Install the necessary dependent packages

sudo apt-get install build-essential subversion git-core libncurses5-dev zlib1g-dev gawk flex quilt libssl-dev xsltproc libxml-parser-perl mercurial bzr ecj cvs unzip lib32z1 lib32z1-dev lib32stdc++6 libstdc++6 libncurses-dev u-boot-tools mkbootimg -y

build

cd buildroot
make   BR2_EXTERNAL="../br2t113pro"  100ask_t113-pro_spinand_core_defconfig
make cjson-rebuild
make V=1

//update config  //Only once
cd ../
cp bmc4tpi/config/sun8iw20p1* buildroot/output/build/linux-5112fdd843715f1615703ca5ce2a06c1abe5f9ee/arch/arm/boot/dts/
cp bmc4tpi/config/kernelconfig buildroot/output/build/linux-5112fdd843715f1615703ca5ce2a06c1abe5f9ee/.config
cp bmc4tpi/config/swupdateconfig buildroot/output/build/swupdate-2021.11/.config
cp bmc4tpi/swupdate/sw-description buildroot/output/images/
cp bmc4tpi/swupdate/genSWU.sh buildroot/output/images/
cp bmc4tpi/swupdate/env0.fex buildroot/output/images/
cp bmc4tpi/swupdate/env1.fex buildroot/output/images/

//rebuild 
cd buildroot
make linux-rebuild
make swupdate-rebuild

make V=1    //build img

//build swu
cd output/images/
./genSWU.sh 1.0.0   //build swu

//Execute mkfw.sh 1.0.0 in the root directory to directly compile the firmware to the build directory
./mkfw.sh 1.0.0