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====== VIM1 Build Android ======

===== Preparations =====

  * [[http://source.android.com/source/initializing.html|Establishing a Build Environment]]
  * [[/products/sbc/vim1/development/android/download-android-source-code|Downloading the Android Source]]
  * [[/products/sbc/vim1/development/android/install-toolchains|Install Toolchains for the Amlogic Platform]]

===== Building =====

<WRAP info >
Before you start to build, make sure you have done all the ''Preparations'' listed above.
</WRAP>

==== Build U-Boot ====

<tabbox Android 6.0/Android 7.1>

```shell
$ cd PATH_YOUR_PROJECT
$ cd uboot
$ make CROSS_COMPILE=aarch64-linux-gnu- kvim_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

<tabbox Android 9.0>

```shell
$ cd PATH_YOUR_PROJECT
$ cd bootloader/uboot
$ ./mk kvim
```

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

</tabbox>
==== Build Android ====

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

Gernerate images: ''out/target/product/kvim/update.img''.

<WRAP info >
  * 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 ''kvim-userdebug-64''.
    * For Android Pie(9.0), it’s ''kvim-userdebug''.
</WRAP>

==== 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:

<tabbox Android 6.0/Android 7.1>

```shell
$ source device/khadas/kvim/mkern.sh

```

<tabbox Android 9.0>

```shell
$ make bootimage
```

</tabbox>



===== See Also =====

  * [[/products/sbc/vim1/install-os/install-os-into-emmc-via-usb-tool|]]
  * [[/products/sbc/vim1/install-os/install-os-into-external-storage|]]