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How to build android kernel?
#1

I want to build own kernel, but I have no idea, please let me know in detail , how to build kernel?

Thanks
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#2

If you are only interested in the kernel, you may use this guide to download and build the appropriate kernel.

The following instructions assume that you have not downloaded all of AOSP.

Depending on which kernel you want,
Code:
$ git clone https://android.googlesource.com/kernel/common.git
$ git clone https://android.googlesource.com/kernel/exynos.git
$ git clone https://android.googlesource.com/kernel/goldfish.git
$ git clone https://android.googlesource.com/kernel/msm.git
$ git clone https://android.googlesource.com/kernel/omap.git
$ git clone https://android.googlesource.com/kernel/samsung.git
$ git clone https://android.googlesource.com/kernel/tegra.git

  1. The goldfish project contains the kernel sources for the emulated platforms.
  2. The msm project has the sources for ADP1, ADP2, Nexus One, Nexus 4, and can be used as a starting point for work on Qualcomm MSM chipsets.
  3. The omap project is used for PandaBoard and Galaxy Nexus, and can be used as a starting point for work on TI OMAP chipsets.
  4. The samsung project is used for Nexus S, and can be used as a starting point for work on Samsung Hummingbird chipsets.
  5. The tegra project is for Xoom and Nexus 7, and can be used as a starting point for work on NVIDIA Tegra chipsets.
  6. The exynos project has the kernel sources for Nexus 10, and can be used as a starting point for work on Samsung Exynos chipsets.

Downloading a prebuilt gcc
Ensure that the prebuilt toolchain is in your path.

Code:
$ export PATH=$(pwd)/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin:$PATH
or
Code:
$ export PATH=$(pwd)/prebuilts/gcc/darwin-x86/arm/arm-eabi-4.6/bin:$PATH
On a linux host, if you don't have an Android source tree, you can download the prebuilt toolchain from:

Code:
$ git clone https://android.googlesource.com/platform/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6

Building
As an example, we would build the panda kernel using the following commands:
Code:
$ export ARCH=arm
$ export SUBARCH=arm
$ export CROSS_COMPILE=arm-eabi-
$ cd omap
$ git checkout <commit_from_first_step>
$ make panda_defconfig
$ make
To build the tuna kernel, you may run the previous commands replacing all instances of "panda" with "tuna".

The kernel binary is output as `arch/arm/boot/zImage`, and needs to be copied into the Android source tree in order to build the matching boot image.

Hope it help you.
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