How To generate images and rootfs using Buildroot for BeagleBone-Black

Step 1: Download source and extract file

I'm using version buildroot-2017.05

https://buildroot.org/downloads/

tar xfv buildroot-2017.05.tar.gz

Step 2: Clean all the previously compiled/generated object files

make distclean

Step 3: Apply board default configuration

make beaglebone_config

Step 4: If you want to do any settings other than default configuration

make menuconfig

You can refer to how I configure the following:

• 1.Target option (not configure)

• 2.Build option (not configure)

• 3.Toolchain:

  • Toolchain: Linaro 6.4.1

• 4.System configuration:

• 5.Kernel:

  • Defconfig name (v4.11.3) → omap2plus
  • Loadaddress: 0x80008000
  • Device tree source: am335x-boneblack

• 6.Target packages: (you can enable function if you need, Ex: ssh (openssh),..)

• 7.Filesystem images (not configure)

• 8.Bootloaders:

  • Build system: Kconfig
  • U-boot version: 2017.03
  • Board defconfig: am335x_boneblack

• 9.Host utilities (not configure)

• 10.Legacy config options (not configure)

Step 5: Generate (about 15~20 min)

make -j4

Note: j4 (4 core machine) will instructs the make tool to spawn 4 threads
You can find number of cores your CPU have

cat /proc/cpuinfo | grep processor | wc -l

After generated, move to /output/images

Step 6: Copy file into SD card or anything can boot

sudo cp uImage u-boot.img amx335x-boneblack.dtb MLO /media/neko/BOOT
sudo tar -xf rootfs.tar -C /media/neko/ROOTFS