VIYARA I.MX6ull

sudo apt-get update
sudo  apt-get -y upgrade
sudo apt install -y gawk wget flex bison git diffstat unzip texinfo gcc build-essential chrpath socat cpio python3 python3-pip python3-pexpect xz-utils debianutils iputils-ping python3-git python3-jinja2 libegl1-mesa libsdl1.2-dev python3-subunit mesa-common-dev zstd liblz4-tool file locales

For UBUNTU 20.04
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for others you check gcc-  press TAB you will gcc get version
sudo apt-get install gcc-10-arm-linux-gnueabihf
sudo apt-get install gcc-10-arm-linux-gnueabihf-base

if you have issue with arm-linux-gnueabihf-gcc not found
then goto cd /usr/bin
sudo ln -sf arm-linux-gnueabihf-gcc-10 arm-linux-gnueabihf-gcc


Other Ubuntu versions
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https://www.dropbox.com/scl/fi/sjrhails1jxorr5915p4e/fsl-imx-fb-glibc-x86_64-meta-toolchain-cortexa7t2hf-neon-mys-6ull-toolchain-5.10-gatesgarth.sh?rlkey=ystecozp00s288fpbnatmba7z&dl=

chmod +x fsl-imx-fb-glibc-x86_64-meta-toolchain-cortexa7t2hf-neon-mys-6ull-toolchain-5.10-gatesgarth.sh
./fsl-imx-fb-glibc-x86_64-meta-toolchain-cortexa7t2hf-neon-mys-6ull-toolchain-5.10-gatesgarth.sh

source environment-setup-cortexa7t2hf-neon-poky-linux-gnueabi
in terminal type "arm-"  and press tab 2 times quickly to see toolchain

//
mkdir ~/yoctotutor
cd ~/yoctotutor
git clone https://github.com/viyaraembedded/viyara-imx-uboot.git
cd viyara-imx-uboot
git checkout imx_2020.04
 
setup toolchain
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export ARCH=arm
export CROSS_COMPILE=arm-linux-gnueabihf-

make mrproper
make ve_imx6ull_nand_ddr256_defconfig
make

# here u-boot-dtb.imx is binary

uboot binary name: u-boot-dtb.imx 
        we will flash "u-boot-dtb.imx" to sdcard RAW partintion
Connect MicroSD card to ubuntu PC
run the below command in uboot dir
sudo dd if=u-boot-dtb.imx of=/dev/sdX bs=1K seek=1 && sync
        Note: here mysdcard connected as /dev/sdc check yours using df -h
remove SDcard and connect to board.
power on board using Micro USB cable

// 
cd ~/yoctotutor
git clone https://github.com/viyaraembedded/viyara-imx-linux.git
cd viyara-imx-linux
git checkout viyara_lf-5.10.y

setup toolchain
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export ARCH=arm
export CROSS_COMPILE=arm-linux-gnueabihf-

make mrproper
make ve_6ulx_defconfig
make -j4

=> setenv mmcroot '/dev/mmcblk0p2 rootwait rw rootdelay=5 mem=256M'
=> run mmcargs
=> fatload mmc 0 0x83000000 zImage
	8649272 bytes read in 384 ms (21.5 MiB/s)
=> fatload mmc 0 0x84000000 mys-6ull-14x14-gpmi-weim.dtb
	35858 bytes read in 10 ms (3.4 MiB/s)
=> bootz 0x83000000 - 0x84000000