Building Android Source Code

Preparations

Building

Note: Before you start to build, make sure you have done all the Preparations listed above.

Build Android 7.1 U-Boot:

$ cd PATH_YOUR_PROJECT
$ cd uboot
$ make CROSS_COMPILE=aarch64-linux-gnu- kvim2_defconfig
$ make CROSS_COMPILE=aarch64-linux-gnu-

Gernerate images in this step:

  • fip/u-boot.bin: for onboard EMMC storage booting
  • fip/u-boot.bin.sd.bin: for external TF card booting

Build Android 9.0 U-Boot:

$ cd PATH_YOUR_PROJECT
$ cd bootloader/uboot
$ ./mk kvim2

Gernerate images in this step:

  • build/u-boot.bin: for onboard EMMC storage booting
  • build/u-boot.bin.sd.bin: for external TF card booting

Build Android:

$ cd PATH_YOUR_PROJECT
$ source build/envsetup.sh
$ lunch TARGET_LUNCH
$ make -jN otapackage

Note:

  • Replace ‘N’ as the number you want when you run ‘make -jN’
  • Replace ‘TARGET_LUNCH’ to your lunch select.
    • For Android Nougat(7.1), it’s kvim2-userdebug-64.
    • For Android Pie(9.0), it’s kvim2-userdebug.

Gernerate images in this step:

  • out/target/product/kvim2/update.img

Build Linux kernel:

When you build the Android Kernel (above), the Linux Kernel will also be built simultaneously.

In some cases, you might want to build the Linux Kernel separately. You can run this script below to do that:

For Android 7.1:

$ source device/khadas/kvim2/mkern.sh

For Android 9.0:

$ make bootimage

See Also