[Guide]How To Compile Kernel (Especially for Redmi Note 5A)

[nayefhaidir]

Hi guys , it is a common fact that kernel runs linux. Without kernel, linux won't be usable. One of linux family is Android. Okay, so after that preamble, i just want to share to you "How To Compile Kernel (Especially for Redmi Note 5A)"​

So, Let's start !​

Prerequisites :

1. Laptop/PC with Linux installed (i prefer Ubuntu based distro, for other distributions i'll update if i have tested​

2. Already installed needed package (you'll see list below)​

3. Internet connection (Optional if you have prepared all)​

Stages :
1. Install all needed packages by typing this command in terminal (if you encounter any error just delete the package that causes error)

sudo apt-get install git –core gnupg flex bison gperf libsdl-dev libesd0-dev libwxgtk2.6-dev build-essential zip curl libncurses5-dev zlib1g-dev ia32-libs lib32z1-dev lib32ncurses5-dev gcc-multilib g++-multilib adb

2. Get the compiler(gcc) by typing this command in terminal

git clone <url> gcc

3. Get the kernel source from github or gitlab or whatever the service is by typing this command in terminal

git clone –b <branch name> https://github.com/xxx/xxx

Compile :
After all required components are ready, now let's start compiling our kernel. Run terminal in your kernel folder and type commands below :
1. First, we have to export(to tell the computer) the path of our compiler(gcc) by typing this command :

export CROSS_COMPILE=/home/<your host>/<gcc folder>/bin/<toolchain prefix>

Example :

export CROSS_COMPILE=/home/nayef/gcc/bin/aarch64-linux-android-

2. Second, we have to export(to tell the computer) the architecture for our devices. Fortunately Redmi Note 5A has ARM 64 bit architecture, so it should be "arm64".

export ARCH=arm64 && export SUBARCH=arm64

3. Third, before compiling, let's configure our devices configuration by using available defconfig, usually our devs name it "ugglite_defconfig", but from official Xiaomi source it is "ugglite_msm8937_defconfig" . There are many sources of Redmi Note 5A Kernel. PM me if you want the list.

make O=out <defconfig name>

Example:

make O=out ugglite_defconfig

4. Now, let's compile it by typing this commands below

make O=out -j4

Reference :
nathanchance thread
Android Google Source

 

[Partha Dip]

Hey man, does the wifi work after compiling the kernel?
I am trying to compile redmi 5a kernel from source.
Even though device boots with new kernel , the wifi doesn't work.
The guid at https://github.com/MiCode/Xiaomi_Kernel_OpenSource/wiki/How-to-compile-kernel-standalone
talks about non-dtbo and include-dtbo. What are those? Can you give me some idea.

 

[nayefhaidir]

Hey man, does the wifi work after compiling the kernel?
I am trying to compile redmi 5a kernel from source.
Even though device boots with new kernel , the wifi doesn't work.
The guid at https://github.com/MiCode/Xiaomi_Kernel_OpenSource/wiki/How-to-compile-kernel-standalone
talks about non-dtbo and include-dtbo. What are those? Can you give me some idea.

you have to add prima wlan drivers to get wifi working correctly

 

[Anonymous Hacking]

Bro plz help me .tell me the source and toolchain you use plz bro reply plz I request

Bro plz tell me toolchain and source you use