[GUIDE] Build Your Own Android Kernel{Easiest and Fastest Way] [Using The NDK]

TheWizardOfROMs said:

I am not sure. I think you can on 32 bit try it the download takes all together about 500 MB

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sert00 said:

mmm..interesting...i always build without the ndk,but simpy sdk.what's the advantages?
and i usually do the git clone to download all the sources,in my case nexus7 and maguro.
thanks for this!

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HTCDreamOn said:

Sorry if this is a stupid question but do we need 64 bit like we do for ROM compiling, or will this work fine for 32 bit (I'm running Ubuntu 12.10 32 bit). Also, roughly how much is there to download? Thanks

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thewadegeek said:

What are you building? If a whole ROM like AOSP,AOKP,PA or CM then they typically bundle the toolchain/kernel with the source, making this totally unneeded.

---------- Post added at 12:18 PM ---------- Previous post was at 12:17 PM ----------



No 32-bit is fine, just install the right libraries. I actually believe that you can compile a ROM on 32-bit as well.

Self-Plug http://xdaforums.com/showthread.php?t=1748297

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TheWizardOfROMs said:

This is the quickest and easiest way to build your own Kernel using the Android NDK

Note:I will be reffering to the following


Note:I am only showing you how to make it to be flashed via CWM. If you wan't a tuttorial on how to make a boot.img comment and i will make it.

What you will need


Step 1:Installing the required files

Open a terminal and type the following (copy-paste)

Code:

sudo apt-get install -y build-essential kernel-package libncurses5-dev bzip2

This will install the packages you need

Download the kernel source code for your device (This is important. We are going to build the kernel from this)

Find your device and click Download

Download The NDK

Move the NDK and your device Kernel source code in your home folder
Extract both the NDK and your kernel source code
Rename the folder were you have the NDK installed to NDK. And rename the folder where you have the kernel installed to Kernel

Now we are ready to build.

Step 2:Tweaking the kernel

Navigate to the kernel folder

Code:

cd /home/yourusername/Kernel

Next we need to point the NDK tools to the kernel folder

Code:

export CROSS_COMPILE=/home/yourusername/NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-

We've pointed the NDK tolls and now we can use the NDK to tweak the kernel

Next we need to clean the previous work just incase:

Code:

make clean && make mrproper

If everything goes well you are good to go. If you have an Error(s) then something is wrong.

Now we are ready.
Next we need to add the kernel features to the NDK so we can modife them
Firs open your kernel source code folder go to arch/arm/configs
Here you will all the configs.
We need only one. Find that. It is called:Yourdevicecode_somethingbalblabla.defconfig
Rename it to maker.defconfig
Now type this in your terminal

Code:

make maker.defconfig

Now we need to tweak those configs.

Code:

make menuconfig

A user interface will pop out showing you all the tweaks you can do. I am not going to show you whow to use it. Google it(Sorry don't have that enough space)
When you are ready close the UI and click SAVE

Step 3 Building
So we tweaked the Kernel and we are ready to build.

Note:The # means the number of CPU cores +1. For example my device has a quad core CPU and I will type

Code:

make -j5 ARCH=arm

This will build the Kernel. It will take about 10 minutes.

Step 4: Finalizing
Now that kernel is ready you will need to find a kernel flashable zip for your device(Just google it)
Download the zip file and leave it in your home folder.

Now got to your kernel source and go to arch/arm/boot and copy zImage
Paste your Zimage to the zip file and replace it.

Now we need the WI-FI modules otherwise your WI-FI will not be working
Go to the Kernel source code folder and go to driver/net/wireless/bcm4329_204 and copy bcm4329.ko
Got the zip file go to the System folder and replace it's bcm4329.ko with your bcm4329.ko

You are ready all you need to do is flash it.

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HTCDreamOn said:

Thanks for the guide, but unfortunately I am getting errors during compilation:

Code:

make -j3 ARCH=arm
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
  HOSTCC  scripts/kallsyms
  HOSTCC  scripts/bin2c
  CC      scripts/mod/empty.o
arm-eabi-gcc: No such file or directory
Is your PATH set correctly?
make[2]: *** [scripts/mod/empty.o] Error 2
make[1]: *** [scripts/mod] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [scripts] Error 2

I am trying to compile the Andromadus 3.0 kernel for HTC Vision, I'd really appreciate some help. I'm using Ubuntu 12.10 32 bit and the Android NDK.

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thewadegeek said:

Check your toolchain definition, looks like your path is wrong.

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TheWizardOfROMs said:

Try building it again. Be sure to clean the source folder before you start

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rp56 said:

I installed Ubuntu on my windows laptop.my computer stars are 3Gigs of memory with 140 Gigs of available free space.Do I have enough space and is my laptop good enough to build kernels on.and I do use Ubuntu 12.04 to build kernels correct.I'm sorry I'm all new to this I just would like to be able to build a kernel for my sensation and HTC one which I will have next week.thanks very much for your time and expertise.

Sent from my HTC Sensation using xda app-developers app

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