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Building on and motivated by this great guide for installing the Android SDK on Ubuntu, I would like to collect instructions for installing all necessary tools and sources for compiling (and potentially developing) kernels for the Sony Xperia ZR phone.

  • @Braiam: Please read the complete question and answer below. The linked guide is incomplete for the Xperia ZR kernel tree. Why would I otherwise bother to do it all again? And why did you remove the sony tag? – FriendFX Jan 29 '14 at 3:32
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Step 1

Follow the Complete Installation Guide for Android SDK on Ubuntu.

Step 2

Install the following packages (I use Synaptic package manager from the Ubuntu Software Repository, but you could do that on the command line via sudo apt-get install <package>):

  • git for downloading the ARM toolchain
  • lzopt which is required for building the kernel

Step 3

Download the open source archive for the phone from the Sony website, the direct link is http://dl-developer.sonymobile.com/code/copylefts/10.4.B.0.569.tar.bz2

Extract the archive which contains the three subdirectories external, kernel and vendor, I put them into ~/10.4.B.0.569.

Step 4

Download the pre-built ARM toolchain binaries from the android Git repository using the following command:

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

I did that in my ~/ directory, where a arm-eabi-4.6 subdirectory was created.

Step 5

To configure the build, I basically followed the instructions given in the ~/10.4.B.0.569/kernel/README_Xperia file. With the directory structures I used, this comes down to the following sequence of commands:

$ cd ~/10.4.B.0.569/kernel
$ export ARCH=arm
$ export CROSS_COMPILE=/home/<USER>/arm-eabi-4.6/bin/arm-eabi-
$ make fusion3_dogo_defconfig

Note that fusion3_dogo_defconfig is for the Xperia ZR and should be replaced if you want to build for a different device (the ~/10.4.B.0.569/kernel/README_Xperia lists the Z, ZL, ZR, Tablet Z and Tablet Z SGP311/SGP312 variants). Also the <USER> needs to be changed to your Ubuntu user name.

Step 6 Now we are ready to build the kernel by simply running make in the ~/10.4.B.0.569/kernel/ directory. This will take some time and if it worked correctly, should result in a ~/10.4.B.0.569/kernel/arch/arm/boot/zImage file.

EDIT:

Unfortunately, I haven't found a way yet to generate a ramdisk or boot image to run or flash the kernel, so I created this related question on Stackoverflow about that.

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