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this thread is a short how to compile lge_star_kernel for cm7. as i am a noobie, if there is mistake, wrong, etc. please correct me.
there is cm kernel how to at http://wiki.cyanogenmod.com/wiki/Building_Kernel_from_source. i will make a few change from there for p990 (shown in bold)
benee in vorkKernel project posted how to compile vorkKernel at https://github.com/VorkTeam/vorkKernel-Scripts/wiki
git tutorial at http://gitref.org/creating/
lge-kernel-star is at http://github.com/CyanogenMod/lge-kernel-star/
# how to #
0. install required development support package : (see cm kernel how to)
0. assuming that cm rom source in ~/android/system and kernel source in ~/android/kernel for 1A and 1B or ~/android/system/kernel for 1C
1A. download kernel source : (first time only. you can use git for deltas only. see post #4 and follow step 1B instead)
> mkdir -p ~/android/kernel
> cd ~/android/kernel
> git clone git://github.com/CyanogenMod/lge-kernel-star.git
> cd lge-kernel-star
1B. update kernel source by git for new commits
> cd ~/android/kernel/lge-kernel-star
> git pull
1C. alternatively, set up git for cm repo
> cp local_manifest.xml ~/android/system/.repo/local_manifest.xml
> cd ~/android/system
> repo sync -j16 kernel/lge-kernel-star
> cd ~/android/system/kernel/lge-kernel-star
2. set up compiler prefix : we need "ARM EABI Toolchain" from prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/bin/ in CM ROM source tree (4.4.3 also works, and i'm using it)
> export CCOMPILER=${HOME}/android/system/prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/arm-eabi-
3. copy config
> cp arch/arm/configs/star_cyanogenmod_defconfig .config
4. run configuration
> make ARCH=arm CROSS_COMPILE=$CCOMPILER oldconfig
5. build
> make ARCH=arm CROSS_COMPILE=$CCOMPILER -j`grep 'processor' /proc/cpuinfo | wc -l`
6. copy kernel and modules to cm source device folder (zImage is renamed as kernel)
> cp arch/arm/boot/zImage ~/android/system/device/lge/p990/kernel
> cp drivers/net/wireless/bcm4329/wireless.ko ~/android/system/device/lge/p990/prebuilt/wireless.ko
7. build CM ROM using the compiled kernel and modules
p.s. i use a bash script that does 2 to 6 automatically.
kernel source mod
# version : the current versioning that shows up in Settings > About phone > kernel version is a bit hard to follow if everybody compiles his/her own kernel. i customize lge-kernel-star/scripts/mkcompile_h and use date as version
46: DATETODAY=`date +"%Y%m%d"`
47: UTS_VERSION="$DATETODAY#$VERSION"
# compiled by : since i have a different username on linux system that i use, force it to show the name you want on it.
67: echo \#define LINUX_COMPILE_BY \"YOUR_NAME\"
68: echo \#define LINUX_COMPILE_HOST \"YOUR_MACHINE\"
here is my (simplified) shell script to compile kernel
Code:
#!/bin/sh
export CCOMPILER=${HOME}/android/system/prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/arm-eabi-
cd ${HOME}/android/kernel/lge-kernel-star || exit
${CCOMPILER}gcc --verbose || exit # show the cross compiler
\cp arch/arm/configs/star_cyanogenmod_defconfig .config
make ARCH=arm CROSS_COMPILE=$CCOMPILER oldconfig
make ARCH=arm CROSS_COMPILE=$CCOMPILER -j`grep 'processor' /proc/cpuinfo | wc -l`
edit: added a printout of manual checking of compiler in line 4
Following is from myfluxi
myfluxi said:
Hey, it's me again. Regarding the kernel thread, cloning the kernel ressources is not very efficient, instead add the git to your repository and just download deltas. Edit (typically) ~/android/.repo/local_manifest.xml by adding:
Code:
<project path="kernel/lge-kernel-star" name="CyanogenMod/lge-kernel-star.git" remote="github" revision="android-tegra-2.6.32" />
And a late happy birthday...
Cheers
Marc
Click to expand...
Click to collapse
Thanks for sharing. I suppose that's the next fun thing to learn.
Oh btw how do u add/remove kernel or init.rc commits?
Exactly what I looked for the other day. Thanks a lot pastime1971!!
This time I won't fail ;-)
EDIT: but I did... I guess it's the export that made me fail?
Code:
[email protected]:~/android/kernel/lge-kernel-star$ make ARCH=arm CROSS_COMPILE=$CCOMPILER -j`grep 'processor' /proc/cpuinfo | wc -l`
scripts/kconfig/conf -s arch/arm/Kconfig
CHK include/linux/version.h
SYMLINK include/asm -> include/asm-arm
make[1]: `include/asm-arm/mach-types.h' is up to date.
CHK include/linux/utsrelease.h
CC scripts/mod/empty.o
cc1: error: unrecognized command line option "-mlittle-endian"
cc1: error: unrecognized command line option "-mapcs"
cc1: error: unrecognized command line option "-mno-sched-prolog"
cc1: error: unrecognized command line option "-mno-thumb-interwork"
scripts/mod/empty.c:1:0: error: unknown ABI (aapcs-linux) for -mabi= switch
scripts/mod/empty.c:1:0: error: bad value (armv5t) for -march= switch
make[2]: *** [scripts/mod/empty.o] Error 1
make[1]: *** [scripts/mod] Error 2
make: *** [scripts] Error 2
temasek said:
Thanks for sharing. I suppose that's the next fun thing to learn.
Oh btw how do u add/remove kernel or init.rc commits?
Click to expand...
Click to collapse
the way i understand it is that boot.img is built w/ kernel (as prebuilt) and init ram disk when you brunch.
there are several init.rc involved. (see out/target/product/p990/root/)
for example w/ secure clock commit, init.p990.rc is from device/lge/p990/init.p990.rc
so, i build (brunch) cyanogen w/ kernel (zImage goes to device/lge/p990/kernel and modules go to device/lge/p990/prebuilt/) compiled as above and init.rc's changed in cm (you could cherry pick them, i suppose)
for kernel itself, i don't know if you can cherry pick them or not. typically, i just apply diff patches. (if someone know how to cherry pick kernel commits, please let us know.)
pastime1971 said:
the way i understand it is that boot.img is built w/ kernel (as prebuilt) and init ram disk when you brunch.
there are several init.rc involved. (see out/target/product/p990/root/)
for example w/ secure clock commit, init.p990.rc is from device/lge/p990/init.p990.rc
so, i build (brunch) cyanogen w/ kernel (zImage goes to device/lge/p990/kernel and modules go to device/lge/p990/prebuilt/) compiled as above and init.rc's changed in cm (you could cherry pick them, i suppose)
for kernel itself, i don't know if you can cherry pick them or not. typically, i just apply diff patches. (if someone know how to cherry pick kernel commits, please let us know.)
Click to expand...
Click to collapse
Thanks.
I'll have a go and it when I'm free. Good to have u onboard.
sibbor said:
Exactly what I looked for the other day. Thanks a lot pastime1971!!
This time I won't fail ;-)
EDIT: but I did... I guess it's the export that made me fail?
Click to expand...
Click to collapse
can you "echo $CCOMPILER" or "env | grep CCOMPILER" before make to ensure that it is exported correctly ?
it re-defines to use those arm-eabi-gcc and others. see lge-kernel-star/Makefile, line 309 : CC = $(CROSS_COMPILE)gcc
without it, you would be calling gcc which doesn't understand -mlittle-endian or other options in that log
edit: i commented out the line of export from my shell script, and i get the exact same error message. it must be export issue.
edit: you should get the following when you do "${CCOMPILER}gcc --verbose"
> ${CCOMPILER}gcc --verbose
Using built-in specs.
Target: arm-eabi
Configured with: /home/jingyu/projects/gcc/android-toolchainsrc/build/../gcc/gcc-4.4.3/configure --prefix=/usr/local --target=arm-eabi --host=x86_64-linux-gnu --build=x86_64-linux-gnu --with-gnu-as --with-gnu-ld --enable-languages=c,c++ --with-gmp=/home/jingyu/projects/gcc/toolchain_build/gingerbreadobj/temp-install --with-mpfr=/home/jingyu/projects/gcc/toolchain_build/gingerbreadobj/temp-install --disable-libssp --enable-threads --disable-nls --disable-libmudflap --disable-libgomp --disable-libstdc__-v3 --disable-sjlj-exceptions --disable-shared --disable-tls --with-float=soft --with-fpu=vfp --with-arch=armv5te --enable-target-optspace --with-abi=aapcs --with-gcc-version=4.4.3 --with-binutils-version=2.19 --with-gmp-version=4.2.4 --with-mpfr-version=2.4.1 --with-gdb-version=7.1.x --with-arch=armv5te --with-multilib-list=mandroid --with-sysroot=/usr/local/google/home/android/cupcake_rel_root --enable-gold=both/gold --program-transform-name='s&^&arm-eabi-&'
Thread model: single
myfluxi said:
pastime1971 said:
Dear Marc,
Do you know how to set up local copy of git for lge-kernel-star ?
I can add that line to cm/.repo/local_manifest.xml and it works.
But I would like to have a separate one just for kernel.
I can copy .repo from cm and strip it down, and leave just kernel. That works as well.
But I was wondering if there is a better way to do it. I tried to "repo init -u git://github.com/CyanogenMod/lge-kernel-star.git -b android-tegra-2.6.32" but it fails w/ the following message: #error message deleted#
besides, the source goes into .repo/manifests/
maybe I need to use git command directly ?
regards,
pastime
Click to expand...
Click to collapse
Hey,
if you just want to be on top of things of our beloved lge-kernel-star, maybe just:
git clone git://github.com/CyanogenMod/lge-kernel-star.git
and then sync with
cd lge-kernel-star
git [pull | fetch]
What do you think?
Cheers
Marc
Click to expand...
Click to collapse
thanks for your advice. i updated the first post accordingly.
edit: w/ today's commit, i tried "git fetch", and nothing happens. tried "git pull" and it downloads new commits. updated the first post. comment welcome if you know the difference between fetch and pull.
Managed to build the kernel now. Will see if my freshly compiled Kang include it or not. If it's included I think it's magic... because I had to create the folders manually where I copied the zImage. Feels like it should already have been there, no?
Hey, pastime, you've got an error in point #6:
Code:
cp arch/arm/boot/zImage ~/andoid/system/device/lge/p990/kernel
should be
Code:
cp arch/arm/boot/zImage ~/and[B]r[/B]oid/system/device/lge/p990/kernel
sibbor said:
Managed to build the kernel now. Will see if my freshly compiled Kang include it or not. If it's included I think it's magic... because I had to create the folders manually where I copied the zImage. Feels like it should already have been there, no?
Hey, pastime, you've got an error in point #6:
Code:
cp arch/arm/boot/zImage ~/andoid/system/device/lge/p990/kernel
should be
Code:
cp arch/arm/boot/zImage ~/and[B]r[/B]oid/system/device/lge/p990/kernel
Click to expand...
Click to collapse
omg, sorry about the typo.... i manually typed those...
glad it is working for you now
when your kernel is included in your kang, you would see your name and host in "About phone"
edit: typo corrected
edit: i just read your comment on the folder... it should be there already, isn't it ? it is under YOUR_CYANOGEN_ROM_SOURCE_FOLDER/device/lge/p990/
edit: device/lge/p990/kernel is a file, not a folder. "zImage" is renamed to "kernel" in that folder (p990). wireless.ko is the same name in p990/prebuilt/
pastime1971 said:
omg, sorry about the typo.... i manually typed those...
glad it is working for you now
when your kernel is included in your kang, you would see your name and host in "About phone"
edit: typo corrected
edit: i just read your comment on the folder... it should be there already, isn't it ? it is under YOUR_CYANOGEN_ROM_SOURCE_FOLDER/device/lge/p990/
edit: device/lge/p990/kernel is a file, not a folder. "zImage" is renamed to "kernel" in that folder (p990). wireless.ko is the same name in p990/prebuilt/
Click to expand...
Click to collapse
Ah, yeah. Thanks!
Sure, it's working for me. [email protected] Sweet stuff! Thanks for the brilliant guide pastime.
Making my own shell scripts now I learn the whole process a bit better too, from A to Z ;-)
sibbor said:
Ah, yeah. Thanks!
Sure, it's working for me. [email protected] Sweet stuff! Thanks for the brilliant guide pastime.
Making my own shell scripts now I learn the whole process a bit better too, from A to Z ;-)
Click to expand...
Click to collapse
you are welcome.
enlighten us if you find a way to improve it, too.
i moved on to using "git pull", thanks to myfluxi
I did another "pull request" on kernel regarding touch screen.
Not sure if I did it right this time, it seems somehow different from last.
Let say you have a old pull request.
How do I withdraw it, update to the latest, and make a new pull request? (Assuming that is a right procedure.) I had to delete the old one, and started from the scratch. Doesn't feel right.
If you're only interested in the kernel, you can build just the boot image if you like:
make -j4 bootimage
Only takes a few seconds really.
Rusty! said:
If you're only interested in the kernel, you can build just the boot image if you like:
make -j4 bootimage
Only takes a few seconds really.
Click to expand...
Click to collapse
i imagined that something like that would be possible.
never knew how...
thanks, rusty
Rusty! said:
If you're only interested in the kernel, you can build just the boot image if you like:
make -j4 bootimage
Only takes a few seconds really.
Click to expand...
Click to collapse
Could u be a little more specific? I tried that command but it builds generic one... Am I missing something here? I think I am....
Insights pls?
make clean
. build/envsetup.sh
lunch p990-eng
make -j4 bootimage
Rusty! said:
make clean
. build/envsetup.sh
lunch p990-user
make -j4 bootimage
Click to expand...
Click to collapse
Cool.
The boot.img created in a blaze. But this method is only applicable if the kernel is committed? What if it is just committed in the star kernel git but yet to be merged to cm, then we do we have to create a zImage and then compile CM ?
Thanks.....
Why would you want to build a kernel yourself?
Click to expand...
Click to collapse
Have you read this: http://forum.xda-developers.com/showpost.php?p=21006133&postcount=1144
In that spirit, I'm going to attempt to write a plain-English tutorial on what to do to build this kernel. In fact, change one or two URLs, and you could build practically any kernel!
Note: I'm assuming you're on a PC here. I'm also assuming this isn't your first trip to linux-land, and you've at least used the terminal a few times before now. I'm also going to assume that even if you are a noob, you're not mentally sub-normal.
Note2: If this is your first time building a kernel, you may want to print this out, and go slowly, and if you get stuck, post about it in the thread! It will help me improve the guide.
What makes this different to other tutorials?
Click to expand...
Click to collapse
I'm a noob at building, but a professional at teaching. It's literally my job! In my noobishness, I made good records of pretty much every step, and I've got lots of time for explaining what each step actually does.
THE STEPS
Got a computer?
Click to expand...
Click to collapse
You'll need one to compile stuff. "For Gingerbread (2.3.x) and newer versions, including the master branch, a 64-bit environment is required." (source)
OK. You're probably thinking of compiling a kernel for ICS or higher right? Is your computer only 32 bit? Pull the processor off the motherboard and count the pins. Just kidding. It won't matter if it is AMD or Intel, but it needs to be a 64 bit processor. I can compile a kernel with just 2GB of RAM and my processor is approaching its 9 year. Even with this lousy set-up, compiling a whole kernel from scratch takes only five minutes.
Install Ubuntu 10.04 64-bit. (Click on this link to download the install CD.)
If you've got a spare hard drive, use the whole thing. If you're good at partitioning, you might consider putting the linux swap partition on a separate disk. You'll want it to be at least 8GB. Putting it on a separate disk will speed things up.
If you don't have a spare disk, you're going to have to resize a partition of an existing OS, to make some new space for Ubuntu. Lets say a minimum of 12GB for the OS plus 8GB for the swap. The more space you can give to the OS, the easier your life will be if you're serious about building stuff.
At the end of the installation it will ask to install a boot-loader. This should be on sda (not sda1!) but you may need to adjust your BIOS to point at the right hard-drive if you later find it doesn't boot into Ubuntu when you restart. Don't worry about Windows, Ubuntu provides a boot menu, so you have the option of booting to Windows instead.
Once Ubuntu is installed, reboot then open a terminal and sort out your credentials:
Code:
sudo passwd root
Type in the password you set during the install, then decide on a password for the root user, and enter it once, then again for confirmation. It can be the same as your user password if you like.
Do some updates (this could take a while):
Code:
sudo apt-get update && sudo apt-get dist-upgrade
When it's finally finished, you'll have to reboot, then repeat until there's no updates left.
You're ready to set up a build environment!
Click to expand...
Click to collapse
First, you need a whole bunch of packages. You could copy and paste this into your terminal:
Code:
sudo add-apt-repository "deb http://archive.canonical.com/ lucid partner" && sudo apt-get update && sudo apt-get install sun-java6-jdk
That's java sorted.
Next up is the dependencies for compiling stuff:
Code:
sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev libc6-dev lib32ncurses5-dev ia32-libs x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown libxml2-utils xsltproc libsdl-dev libesd0-dev libwxgtk2.6-dev libncurses5-dev lib32z1-dev gcc-multilib git-core && sudo ln -s /usr/lib32/mesa/libGL.so.1 /usr/lib32/mesa/libGL.so
I think I remember getting an error for one of these. Possibly lib32readline5-dev. If you get that error, make sure you install everything else. Please let me know, and I'll update this step with a fix.
Make sure ADB is initialised:
Code:
gedit /etc/udev/rules.d/51-android.rules
and copy the below into a blank text file, then edit both instances of <username> to your Ubuntu username (lower-case!) and no chevrons: ="<bedalus>" is wrong. You want ="bedalus"
Code:
# adb protocol on crespo/crespo4g (Nexus S)
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4e22", MODE="0600", OWNER="<username>"
# fastboot protocol on crespo/crespo4g (Nexus S)
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4e20", MODE="0600", OWNER="<username>"
Now save the file!
Get hold of a Cross-Compiler
Click to expand...
Click to collapse
Follow this link to Mentor Graphics Sourcery CodeBench LITE and do a free signup to get the download link. You can get hold of other ones, like Linaro or Google's own, but I'm using this as an example, because it's the one I use, and Ezekeel published some R&D here that showed there was no measurable benefit to one toolchain over another.
When you've downloaded it, you need to copy it to /opt:
Code:
cd /home/<username>/Downloads
cp arm-some-date-some-version-some-arch.tar.bz2 /opt
Note- Obviously that's not the actual name of the file! But you can see what it's really called when you download it.
Now go to /opt and unpack it:
Code:
cd /opt
tar xjf arm-some-date-some-version-some-arch.tar.bz2
So I've got all the tools. Now what?
Click to expand...
Click to collapse
So now you need to get some source code. You can use 'git clone' if you don't plan on publishing your kernel. But if you've made some modifications and want to share your end result, you need to obey the GPL terms for the linux kernel, which is Open Source, meaning that you are required to make your source available publicly.
Go to github: https://github.com/
...and sign up. It's just a free registration provided you are non-commercial. Github has some useful getting started tutorials, which I suggest you follow:
https://help.github.com/articles/set-up-git
(just follow that first page for now. I will walk you through git in a bit...)
Next, fork a repo:
Go to whichever kernel you like: https://github.com/bedalus/bedalusKERNEL
I'm using mine as an example. Look for the big 'Fork' button.
You've now got your own copy on github, and you can do whatever you like with it, without affecting the original.
However, it's no use if it exists only in the cloud. You need to get a local copy. You'll also want something called a 'remote tracking branch', which will enable you to keep up-to-date with the changes going on in the original repository that you have forked-off from.
Critical Step:
Click to expand...
Click to collapse
Shout 'fork-off!' at the top of your voice.
Uh... okay. Now, to get a local copy, and set up your remote-tracking branches, execute:
Code:
cd /home/<username>/
mkdir mykernel
...you can name your new directory whatever you want. It doesn't have to be 'mykernel', then:
Code:
git clone https://github.com/<your github username>/bedalusKERNEL.git
In the above, put your git username, and substitute bedalusKERNEL.git for whatever your fork is called. You can actually copy and paste the URL from the top of your new github repo's page if you want.
It's going to download about 800MB if I remember correctly. This will take a while, so go have some marmite on toast.
When that's done, you're ready for the remote-tracking branch:
Code:
cd bedalusKERNEL (or whatever your fork is called)
git remote add upstream https://github.com/bedalus/bedalusKERNEL.git
git fetch upstream
The 'git remote add upstream' creates a new branch called upstream, and any changes that the original developer uploads to github can be fetched to your machine with the 'git fetch upstream' command. Notice how this time, the download time is much shorter? That's because of 'delta downloads' which only downloads the differences between what you have, and what they have. (There's some technical detail here.)
Git Tip No. 1: What branches do I have?
Click to expand...
Click to collapse
You can now enter:
Code:
git branch
...to see all your branches. At this point there should be 'origin' and 'upstream'.
Git Tip No. 2: How do I change branches?
Click to expand...
Click to collapse
Changing branches (you might as well do this now just to have a little go):
Code:
git checkout upstream
That will move you onto the upstream branch, as long as you haven't made any 'uncommited' changes in origin. (More on that later.) Change back to origin with:
Code:
git checkout origin
Git Tip No. 3: How do I rename a branch?
Click to expand...
Click to collapse
You might want to rename your branches to help personalise them, just to make remembering which is which a little bit easier. To change origin to 'my_version' do this:
Code:
git branch -m origin my_version
You can change upstream to 'their_version' or something else if you want to. It won't stop anything from working.
More Git Tips later. Let's sort out a build script. If you tinker with any code, you'll inevitably break stuff, and need to fix it, and then need to try building again... So, having a build script is going to save you a lot of time, because there are several steps that can be automated.
Here's how the start of my script looks:
Code:
#!/bin/sh
cd /home/dave/mykernel
git branch
read -p "Correct branch? [Y/N]: " -n 1
if [[ ! $REPLY =~ ^[Yy]$ ]]
then
echo -e "\n"
exit 1
fi
This is just a little precaution that I put in to give myself the chance to abort the build before it starts if I'm on the wrong branch. If I don't hit y then the script aborts, and I can checkout the right branch, then restart the script.
Code:
echo -e "\nSTARTING...\n"
The \n prints a new line, then on that new line the message 'STARTING...' and then begins another new line. If you put \n\n you can print a blank line. The echo command is a good way of putting notices in a script so you know what stage it is at.
Code:
export PATH=$PATH:/opt/toolchain/bin/
export ARCH=arm
export SUBARCH=arm
export CROSS_COMPILE=arm-none-eabi-
If you put these lines in your script, it sets 'environment variables' that tells the make program where to find the compiler, and what processor it's compiling for (ARM).
If you now save your script in the /mykernel directory you created earlier, git can keep track of it as well as the files integral to the kernel. Save it as whatever you like, e.g. "myscript.sh"
...It's important to have the .sh extension so the system knows it is a script.
To make your script executable, run:
Code:
chmod a+x myscript.sh
Before you execute the script, you need a .config file in the mykernel directory. If you've cloned my repo, you can get a working one by executing:
Code:
cp arch/arm/configs/crespo_release_defconfig ./.config
...this command will only work properly if you are in the mykernel directory when you execute it.
You can mess with this config file if you like! But it's very easy to break the kernel. However, you can always just copy the crespo_release_defconfig again.
Now, to execute the build script run:
Code:
./myscript
If you execute your script, your compiler will now build the kernel. It will take time, but even on my ten-years-old PC it takes less than ten minutes from scratch.
The compiler will spit out a lot of messages. Most of the time it's telling you that it has compiled an object (i.e. a .o file, which will all be linked up later to form the kernel) and sometimes you'll see warnings, which is the compiler telling you it thinks something might be wrong. Don't worry, most of the time the compiler is just being over-cautious.
If the compiler hits a real problem with the code, it will print an error, and tell you what file, and what line, and how far along that line it managed to get to before it didn't know what to do. I'll get back to this later. For now, let's assume everything compiled.
You'll see a message about the zImage being created. That's the kernel. You can't use it as it is, you need to put it into a boot.img so you can flash it.
I find it useful to add this command in my build-script:
Code:
ls -l /home/dave/mykernel/arch/arm/boot/zImage
ls -l means list with long format. It'll print out the entire contents of a directory with size, time, permissions, etc. if you execute it in a directory, or point it to a directory. However, in the command above, I've pointed it specifically at the zImage file, so it only prints out the details for that. This is so I can check the time. If the time is from yesterday, I can see quickly that there has been an error in the build, and the zImage is still the same one I built yesterday, or an hour ago... etc. depending on the time-stamp printed out.
If you get a 'No such file' error, it's because there is no old zImage, because you haven't ever successfully built one yet.
If you sat and watched the entire thing build, then the timestamp should show the current time, minus a few seconds.
How do I make this zImage into a CWM flashable .zip file?
Click to expand...
Click to collapse
Yay! You've built a kernel. Now you need to make everybody else flash it to their phones too
To do this you need to put it into a boot.img, and then into a .zip file.
Making the boot.img
Click to expand...
Click to collapse
Download this: http://d-h.st/wVZ (make-boot necessary files)
It's a small download. It's some very simple tools that can split an existing boot image into a ramdisk and zImage, and can also stitch them back up.
Move mkboot.zip into your mykernel folder, right click on it, and select 'Extract Here'. You can now delete mkboot.zip. There is a tool called unbootimg, that can take apart existing boot.img files, I've made things simple by including my own ramdisk, which is compatible with AOSP and CM ROMs. That file is called cyan2disk_new.cpio.gz
We now need to add some new stuff to the script to stitch our zImage and ramdisk together.
If you've not already added the ls -l command I mentioned above, also add this now. Then:
Code:
cp /home/dave/mykernel/arch/arm/boot/zImage /home/dave/mykernel/mkboot/
cd /home/dave/mykernel/mkboot
./mkbootimg --kernel zImage --ramdisk cyan2disk_new.cpio.gz --cmdline 'no_console_suspend=1 console=bull's --base 0x30000000 --pagesize 4096 -o boot.img
Remember, your username is not dave! Unless it is. Make the appropriate changes to the path.
How do I make the CWM flashable .zip file?
We're nearly there! This bit is relatively painless. At this point you could save and run the script to check that mkboot is working. If it has worked you can use the same ls -l trick from before, but this time target the boot.img file you just created. If the time-stamp is fresh, it means your boot.img is correct.
TIP: If you haven't switched branches, or run 'make clean', all your .o files are unchanged. The make program keeps track of changes, and only recompiles .o files when the corresponding .c file has been altered. If nothing has changed, your build script will execute very quickly!
To make a flashable .zip file, the easiest thing to do is modify an existing .zip file. You can download my kernel for simplicity, since it already has the necessary script for flashing the entire boot partition. (Most kernels here use koush's any-kernel script, which updates only the zImage and keeps the boot partition's existing ramdisk, so if you try to use another kernel .zip as a template, make sure you correct their updater-script. Using my ramdisk and kernel script will also ensure you keep MTP!)
Once you've downloaded my kernel you should extract it in your home folder, then rename the directory to something like 'myzip'
Now add these lines to your build-script:
Code:
cp /home/dave/mykernel/mkboot/boot.img /home/dave/myzip/boot.img
cp /home/dave/mykernel/drivers/scsi/scsi_wait_scan.ko /home/dave/myzip/system/modules/
"What's that second line? With the .ko file?" I hear you say. Depending on what modules you build, you'll need to copy all of them to the folder specified above. Fortunately, when the kernel finishes building, it tells you what modules have also been built. If you don't want modules in your kernel, you can remove the second line above. However, you must edit your .config file: Open it in gedit, use CTRL+F to open the find dialogue, then type "=m" Now, change every one you find into a "=y" ...so now instead of building modules, the kernel will now incorporate all that code into the zImage instead.
Finally, add this line to your build-script:
Code:
7z a -r -tzip /home/dave/mykernel.zip /home/dave/myzip/*
Run the script again. if everything has gone smoothly, then you now have a flashable .zip in your home directory!
Congratulations!
* * * * * * * * *
More git tips!
Click to expand...
Click to collapse
I've compiled a list of commands you may find handy when getting to know git.
Add a remote branch and track it
git remote add ezekeel git://github.com/Ezekeel/GLaDOS-nexus-s-ics.git
git fetch ezekeel
git checkout --track -b bln ezekeel/bln
Merge in the changes
git merge bln
Resolve conflicts
git mergetool
List local branches
git branch
List remote branches
git branch -r
Switch branch
git checkout branch_name
Rename a branch
git branch -m old_branch_name new_branch_name
View log with short sha1 hash
git log -10 --pretty=format:"%h - %ar: %s"
Restore to a particular point
(IMPORTANT! Don't do this if you've already pushed your commits to github!)
git reset --hard <sha1 hash>
Restore to your last commit
git reset --hard HEAD
Restore to one commit before your last commit:
git reset --hard HEAD^
Restore to two commits before your last commit:
git reset --hard HEAD^^ (etc.)
As long as you haven't pushed to github,
squash all your recent commits into one:
git rebase -i <sha1> ...then change push to squash (or fixup) for all except the first one
git rebase -i --abort (to abort!)
Add .file (i.e. hidden file)
git add .file (simple!)
Add all new and modified files
git add .
Deleting files
(i.e. after doing rm <files>)
git add -u (git will note which files have been deleted)
Bring files from a directory in another branch
git checkout cyanogenmod drivers/cpufreq/
Tells you what changes you've made so far
git status
Commit your changes
git commit (type in your notes about what you did, then CTRL+X then Y to save)
Sync your commits to your github repo
git push <repo_name> <branch_name>
Delete a remote branch
(WARNING: This will delete the entire branch from github
Note: You cannot do this to the default github branch, but you can change the default branch in the admin tab on the website)
git push <repo_name> :<branch to be deleted>
General tips! File management, searching... etc.
Click to expand...
Click to collapse
Find a file (useful for troubleshooting in some situations)
find /home/dave/ -name 'buildlean.sh'
(searches the home folder and subdirectories for 'buildlean.sh')
Find within any *.c file, the text "s5pv210_driver" (good for finding bits of code)
find ./ -type f -name *.c | xargs grep s5pv210_driver
Find within any file, the text "s5pv210_driver" (good for finding bits of code)
find ./ -type f | xargs grep s5pv210_driver
Special Mention : bedalus [Original maker of this Post]. Thank Him Not Me!!
I will not help in this thread as I am not a kernel Dev. I just kanged it here so there Can Be New Developers
Click to expand...
Click to collapse
Click to expand...
Click to collapse
I m getting an error which you've mentioned after applying this code
sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev libc6-dev lib32ncurses5-dev ia32-libs x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown libxml2-utils xsltproc libsdl-dev libesd0-dev libwxgtk2.6-dev libncurses5-dev lib32z1-dev gcc-multilib git-core && sudo ln -s /usr/lib32/mesa/libGL.so.1 /usr/lib32/mesa/libGL.so
Click to expand...
Click to collapse
EDIT: page not found https://github.com/bedalus/bedalusKERNEL
l0lh4rd said:
I m getting an error which you've mentioned after applying this code
EDIT: page not found https://github.com/bedalus/bedalusKERNEL
Click to expand...
Click to collapse
Ubuntu??
Which Device??
mithun46 said:
Ubuntu??
Which Device??
Click to expand...
Click to collapse
Ubuntu 12.04 LTS (x64)
l0lh4rd said:
Ubuntu 12.04 LTS (x64)
Click to expand...
Click to collapse
Device???????
@l0lh4rd
Your device probably has different sources. And the page was not found because bedalus doesn't have any public repo by that name anymore.
Below
Sent from my GT-S5360 using xda app-developers app
thanks i'll find a time and try.
I am going to say WOW. Is everyone as lost and confused about what this is or does? I know I am. First off. I think you started off with a very good Tut. The problem is, you never said what you are compiling or what its for. The more advance users can figure it out and actually understand what you said. But what about the n00bs here? If I understand the jibberish you are compiling a Arm kernel off of linux. It would have been more useful if you had mentioned that this is the Arm kernal for the android platform. It would have also been better if you had said what chip your where using. Is this for the Arm5, Arm6, Arm7? You should also give warning about compiling the kernal and how they can screw things up if they don't follow the steps properly and not to skip or try something that is not listed. You also say that you are using Ubuntu, which alot do, but not all. Some use other distro's and that this may not work on all flavors of linux. Some use different commands and some repo's don't work on all distro's either.
Other then that, pretty nice Tut.
mithun46 said:
Have you read this: http://forum.xda-developers.com/showpost.php?p=21006133&postcount=1144
In that spirit, I'm going to attempt to write a plain-English tutorial on what to do to build this kernel. In fact, change one or two URLs, and you could build practically any kernel!
Note: I'm assuming you're on a PC here. I'm also assuming this isn't your first trip to linux-land, and you've at least used the terminal a few times before now. I'm also going to assume that even if you are a noob, you're not mentally sub-normal.
Note2: If this is your first time building a kernel, you may want to print this out, and go slowly, and if you get stuck, post about it in the thread! It will help me improve the guide.
I'm a noob at building, but a professional at teaching. It's literally my job! In my noobishness, I made good records of pretty much every step, and I've got lots of time for explaining what each step actually does.
THE STEPS
You'll need one to compile stuff. "For Gingerbread (2.3.x) and newer versions, including the master branch, a 64-bit environment is required." (source)
OK. You're probably thinking of compiling a kernel for ICS or higher right? Is your computer only 32 bit? Pull the processor off the motherboard and count the pins. Just kidding. It won't matter if it is AMD or Intel, but it needs to be a 64 bit processor. I can compile a kernel with just 2GB of RAM and my processor is approaching its 9 year. Even with this lousy set-up, compiling a whole kernel from scratch takes only five minutes.
Install Ubuntu 10.04 64-bit. (Click on this link to download the install CD.)
If you've got a spare hard drive, use the whole thing. If you're good at partitioning, you might consider putting the linux swap partition on a separate disk. You'll want it to be at least 8GB. Putting it on a separate disk will speed things up.
If you don't have a spare disk, you're going to have to resize a partition of an existing OS, to make some new space for Ubuntu. Lets say a minimum of 12GB for the OS plus 8GB for the swap. The more space you can give to the OS, the easier your life will be if you're serious about building stuff.
At the end of the installation it will ask to install a boot-loader. This should be on sda (not sda1!) but you may need to adjust your BIOS to point at the right hard-drive if you later find it doesn't boot into Ubuntu when you restart. Don't worry about Windows, Ubuntu provides a boot menu, so you have the option of booting to Windows instead.
Once Ubuntu is installed, reboot then open a terminal and sort out your credentials:
Code:
sudo passwd root
Type in the password you set during the install, then decide on a password for the root user, and enter it once, then again for confirmation. It can be the same as your user password if you like.
Do some updates (this could take a while):
Code:
sudo apt-get update && sudo apt-get dist-upgrade
When it's finally finished, you'll have to reboot, then repeat until there's no updates left.
First, you need a whole bunch of packages. You could copy and paste this into your terminal:
Code:
sudo add-apt-repository "deb http://archive.canonical.com/ lucid partner" && sudo apt-get update && sudo apt-get install sun-java6-jdk
That's java sorted.
Next up is the dependencies for compiling stuff:
Code:
sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev libc6-dev lib32ncurses5-dev ia32-libs x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown libxml2-utils xsltproc libsdl-dev libesd0-dev libwxgtk2.6-dev libncurses5-dev lib32z1-dev gcc-multilib git-core && sudo ln -s /usr/lib32/mesa/libGL.so.1 /usr/lib32/mesa/libGL.so
I think I remember getting an error for one of these. Possibly lib32readline5-dev. If you get that error, make sure you install everything else. Please let me know, and I'll update this step with a fix.
Make sure ADB is initialised:
Code:
gedit /etc/udev/rules.d/51-android.rules
and copy the below into a blank text file, then edit both instances of <username> to your Ubuntu username (lower-case!) and no chevrons: ="<bedalus>" is wrong. You want ="bedalus"
Code:
# adb protocol on crespo/crespo4g (Nexus S)
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4e22", MODE="0600", OWNER="<username>"
# fastboot protocol on crespo/crespo4g (Nexus S)
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4e20", MODE="0600", OWNER="<username>"
Now save the file!
Follow this link to Mentor Graphics Sourcery CodeBench LITE and do a free signup to get the download link. You can get hold of other ones, like Linaro or Google's own, but I'm using this as an example, because it's the one I use, and Ezekeel published some R&D here that showed there was no measurable benefit to one toolchain over another.
When you've downloaded it, you need to copy it to /opt:
Code:
cd /home/<username>/Downloads
cp arm-some-date-some-version-some-arch.tar.bz2 /opt
Note- Obviously that's not the actual name of the file! But you can see what it's really called when you download it.
Now go to /opt and unpack it:
Code:
cd /opt
tar xjf arm-some-date-some-version-some-arch.tar.bz2
So now you need to get some source code. You can use 'git clone' if you don't plan on publishing your kernel. But if you've made some modifications and want to share your end result, you need to obey the GPL terms for the linux kernel, which is Open Source, meaning that you are required to make your source available publicly.
Go to github: https://github.com/
...and sign up. It's just a free registration provided you are non-commercial. Github has some useful getting started tutorials, which I suggest you follow:
https://help.github.com/articles/set-up-git
(just follow that first page for now. I will walk you through git in a bit...)
Next, fork a repo:
Go to whichever kernel you like: https://github.com/bedalus/bedalusKERNEL
I'm using mine as an example. Look for the big 'Fork' button.
You've now got your own copy on github, and you can do whatever you like with it, without affecting the original.
However, it's no use if it exists only in the cloud. You need to get a local copy. You'll also want something called a 'remote tracking branch', which will enable you to keep up-to-date with the changes going on in the original repository that you have forked-off from.
Shout 'fork-off!' at the top of your voice.
Uh... okay. Now, to get a local copy, and set up your remote-tracking branches, execute:
Code:
cd /home/<username>/
mkdir mykernel
...you can name your new directory whatever you want. It doesn't have to be 'mykernel', then:
Code:
git clone https://github.com/<your github username>/bedalusKERNEL.git
In the above, put your git username, and substitute bedalusKERNEL.git for whatever your fork is called. You can actually copy and paste the URL from the top of your new github repo's page if you want.
It's going to download about 800MB if I remember correctly. This will take a while, so go have some marmite on toast.
When that's done, you're ready for the remote-tracking branch:
Code:
cd bedalusKERNEL (or whatever your fork is called)
git remote add upstream https://github.com/bedalus/bedalusKERNEL.git
git fetch upstream
The 'git remote add upstream' creates a new branch called upstream, and any changes that the original developer uploads to github can be fetched to your machine with the 'git fetch upstream' command. Notice how this time, the download time is much shorter? That's because of 'delta downloads' which only downloads the differences between what you have, and what they have. (There's some technical detail here.)
You can now enter:
Code:
git branch
...to see all your branches. At this point there should be 'origin' and 'upstream'.
Changing branches (you might as well do this now just to have a little go):
Code:
git checkout upstream
That will move you onto the upstream branch, as long as you haven't made any 'uncommited' changes in origin. (More on that later.) Change back to origin with:
Code:
git checkout origin
You might want to rename your branches to help personalise them, just to make remembering which is which a little bit easier. To change origin to 'my_version' do this:
Code:
git branch -m origin my_version
You can change upstream to 'their_version' or something else if you want to. It won't stop anything from working.
More Git Tips later. Let's sort out a build script. If you tinker with any code, you'll inevitably break stuff, and need to fix it, and then need to try building again... So, having a build script is going to save you a lot of time, because there are several steps that can be automated.
Here's how the start of my script looks:
Code:
#!/bin/sh
cd /home/dave/mykernel
git branch
read -p "Correct branch? [Y/N]: " -n 1
if [[ ! $REPLY =~ ^[Yy]$ ]]
then
echo -e "\n"
exit 1
fi
This is just a little precaution that I put in to give myself the chance to abort the build before it starts if I'm on the wrong branch. If I don't hit y then the script aborts, and I can checkout the right branch, then restart the script.
Code:
echo -e "\nSTARTING...\n"
The \n prints a new line, then on that new line the message 'STARTING...' and then begins another new line. If you put \n\n you can print a blank line. The echo command is a good way of putting notices in a script so you know what stage it is at.
Code:
export PATH=$PATH:/opt/toolchain/bin/
export ARCH=arm
export SUBARCH=arm
export CROSS_COMPILE=arm-none-eabi-
If you put these lines in your script, it sets 'environment variables' that tells the make program where to find the compiler, and what processor it's compiling for (ARM).
If you now save your script in the /mykernel directory you created earlier, git can keep track of it as well as the files integral to the kernel. Save it as whatever you like, e.g. "myscript.sh"
...It's important to have the .sh extension so the system knows it is a script.
To make your script executable, run:
Code:
chmod a+x myscript.sh
Before you execute the script, you need a .config file in the mykernel directory. If you've cloned my repo, you can get a working one by executing:
Code:
cp arch/arm/configs/crespo_release_defconfig ./.config
...this command will only work properly if you are in the mykernel directory when you execute it.
You can mess with this config file if you like! But it's very easy to break the kernel. However, you can always just copy the crespo_release_defconfig again.
Now, to execute the build script run:
Code:
./myscript
If you execute your script, your compiler will now build the kernel. It will take time, but even on my ten-years-old PC it takes less than ten minutes from scratch.
The compiler will spit out a lot of messages. Most of the time it's telling you that it has compiled an object (i.e. a .o file, which will all be linked up later to form the kernel) and sometimes you'll see warnings, which is the compiler telling you it thinks something might be wrong. Don't worry, most of the time the compiler is just being over-cautious.
If the compiler hits a real problem with the code, it will print an error, and tell you what file, and what line, and how far along that line it managed to get to before it didn't know what to do. I'll get back to this later. For now, let's assume everything compiled.
You'll see a message about the zImage being created. That's the kernel. You can't use it as it is, you need to put it into a boot.img so you can flash it.
I find it useful to add this command in my build-script:
Code:
ls -l /home/dave/mykernel/arch/arm/boot/zImage
ls -l means list with long format. It'll print out the entire contents of a directory with size, time, permissions, etc. if you execute it in a directory, or point it to a directory. However, in the command above, I've pointed it specifically at the zImage file, so it only prints out the details for that. This is so I can check the time. If the time is from yesterday, I can see quickly that there has been an error in the build, and the zImage is still the same one I built yesterday, or an hour ago... etc. depending on the time-stamp printed out.
If you get a 'No such file' error, it's because there is no old zImage, because you haven't ever successfully built one yet.
If you sat and watched the entire thing build, then the timestamp should show the current time, minus a few seconds.
Yay! You've built a kernel. Now you need to make everybody else flash it to their phones too
To do this you need to put it into a boot.img, and then into a .zip file.
Download this: http://d-h.st/wVZ (make-boot necessary files)
It's a small download. It's some very simple tools that can split an existing boot image into a ramdisk and zImage, and can also stitch them back up.
Move mkboot.zip into your mykernel folder, right click on it, and select 'Extract Here'. You can now delete mkboot.zip. There is a tool called unbootimg, that can take apart existing boot.img files, I've made things simple by including my own ramdisk, which is compatible with AOSP and CM ROMs. That file is called cyan2disk_new.cpio.gz
We now need to add some new stuff to the script to stitch our zImage and ramdisk together.
If you've not already added the ls -l command I mentioned above, also add this now. Then:
Code:
cp /home/dave/mykernel/arch/arm/boot/zImage /home/dave/mykernel/mkboot/
cd /home/dave/mykernel/mkboot
./mkbootimg --kernel zImage --ramdisk cyan2disk_new.cpio.gz --cmdline 'no_console_suspend=1 console=bull's --base 0x30000000 --pagesize 4096 -o boot.img
Remember, your username is not dave! Unless it is. Make the appropriate changes to the path.
How do I make the CWM flashable .zip file?
We're nearly there! This bit is relatively painless. At this point you could save and run the script to check that mkboot is working. If it has worked you can use the same ls -l trick from before, but this time target the boot.img file you just created. If the time-stamp is fresh, it means your boot.img is correct.
TIP: If you haven't switched branches, or run 'make clean', all your .o files are unchanged. The make program keeps track of changes, and only recompiles .o files when the corresponding .c file has been altered. If nothing has changed, your build script will execute very quickly!
To make a flashable .zip file, the easiest thing to do is modify an existing .zip file. You can download my kernel for simplicity, since it already has the necessary script for flashing the entire boot partition. (Most kernels here use koush's any-kernel script, which updates only the zImage and keeps the boot partition's existing ramdisk, so if you try to use another kernel .zip as a template, make sure you correct their updater-script. Using my ramdisk and kernel script will also ensure you keep MTP!)
Once you've downloaded my kernel you should extract it in your home folder, then rename the directory to something like 'myzip'
Now add these lines to your build-script:
Code:
cp /home/dave/mykernel/mkboot/boot.img /home/dave/myzip/boot.img
cp /home/dave/mykernel/drivers/scsi/scsi_wait_scan.ko /home/dave/myzip/system/modules/
"What's that second line? With the .ko file?" I hear you say. Depending on what modules you build, you'll need to copy all of them to the folder specified above. Fortunately, when the kernel finishes building, it tells you what modules have also been built. If you don't want modules in your kernel, you can remove the second line above. However, you must edit your .config file: Open it in gedit, use CTRL+F to open the find dialogue, then type "=m" Now, change every one you find into a "=y" ...so now instead of building modules, the kernel will now incorporate all that code into the zImage instead.
Finally, add this line to your build-script:
Code:
7z a -r -tzip /home/dave/mykernel.zip /home/dave/myzip/*
Run the script again. if everything has gone smoothly, then you now have a flashable .zip in your home directory!
Congratulations!
* * * * * * * * *
I've compiled a list of commands you may find handy when getting to know git.
Add a remote branch and track it
git remote add ezekeel git://github.com/Ezekeel/GLaDOS-nexus-s-ics.git
git fetch ezekeel
git checkout --track -b bln ezekeel/bln
Merge in the changes
git merge bln
Resolve conflicts
git mergetool
List local branches
git branch
List remote branches
git branch -r
Switch branch
git checkout branch_name
Rename a branch
git branch -m old_branch_name new_branch_name
View log with short sha1 hash
git log -10 --pretty=format:"%h - %ar: %s"
Restore to a particular point
(IMPORTANT! Don't do this if you've already pushed your commits to github!)
git reset --hard <sha1 hash>
Restore to your last commit
git reset --hard HEAD
Restore to one commit before your last commit:
git reset --hard HEAD^
Restore to two commits before your last commit:
git reset --hard HEAD^^ (etc.)
As long as you haven't pushed to github,
squash all your recent commits into one:
git rebase -i <sha1> ...then change push to squash (or fixup) for all except the first one
git rebase -i --abort (to abort!)
Add .file (i.e. hidden file)
git add .file (simple!)
Add all new and modified files
git add .
Deleting files
(i.e. after doing rm <files>)
git add -u (git will note which files have been deleted)
Bring files from a directory in another branch
git checkout cyanogenmod drivers/cpufreq/
Tells you what changes you've made so far
git status
Commit your changes
git commit (type in your notes about what you did, then CTRL+X then Y to save)
Sync your commits to your github repo
git push <repo_name> <branch_name>
Delete a remote branch
(WARNING: This will delete the entire branch from github
Note: You cannot do this to the default github branch, but you can change the default branch in the admin tab on the website)
git push <repo_name> :<branch to be deleted>
Find a file (useful for troubleshooting in some situations)
find /home/dave/ -name 'buildlean.sh'
(searches the home folder and subdirectories for 'buildlean.sh')
Find within any *.c file, the text "s5pv210_driver" (good for finding bits of code)
find ./ -type f -name *.c | xargs grep s5pv210_driver
Find within any file, the text "s5pv210_driver" (good for finding bits of code)
find ./ -type f | xargs grep s5pv210_driver
Special Mention : bedalus [Original maker of this Post]. Thank Him Not Me!!
I will not help in this thread as I am not a kernel Dev. I just kanged it here so there Can Be New Developers
Click to expand...
Click to collapse
excellent but! you will not have a custom kernel. why?
where did "make menuconfig" go?
you selected yes as default, what if i wanted a custom kernel w/o a "Y" for each?
i want to keep my kernel bare minimal. this is not for minimalistic kernel.?
how you pass other kernel params?
you can pass gcc optimizations in -Os but what if i wish to pass it in the kernel build process?
how on earth using this script? can i include firmwares? aka blobwares which are at times ultimate necessity.....?
what if i want to include my patch and the kernel w/o boot w/o special params or switch....?
how do i set the compression params?
well i am still the old school "make menuconfig" and that
cp arch/arm/configs/crespo_release_defconfig ./.config is not my cup of tea. i still like to roll my own kernel the orthodox method, than this automation.
this is okay if you are building your first kernel and you dont know the process. but this is not the right way if you want a complete fine grained inside out control of the device and the kernel.
NOPE NOPE NOPE!
but the git crash course is excellent. i wanted as usual a git flash cards. thanks
+5 to mithun for the git. everything else i found tasty but was a fruit salad, except git tut. which i found very very well documented.
+5 for git. and +1 for the effort for the kernel info.
hope this helps.
thanks
-paul
p.s. very good effort even tho its cut copy paste but the original post didnt address many kernel issues. hope its updated. hope you take it as a positive feedback.
---------- Post added at 03:08 AM ---------- Previous post was at 03:00 AM ----------
TheStrokerace said:
I am going to say WOW. Is everyone as lost and confused about what this is or does? I know I am. First off. I think you started off with a very good Tut. The problem is, you never said what you are compiling or what its for. The more advance users can figure it out and actually understand what you said. But what about the n00bs here? If I understand the jibberish you are compiling a Arm kernel off of linux. It would have been more useful if you had mentioned that this is the Arm kernal for the android platform. It would have also been better if you had said what chip your where using. Is this for the Arm5, Arm6, Arm7? You should also give warning about compiling the kernal and how they can screw things up if they don't follow the steps properly and not to skip or try something that is not listed. You also say that you are using Ubuntu, which alot do, but not all. Some use other distro's and that this may not work on all flavors of linux. Some use different commands and some repo's don't work on all distro's either.
Other then that, pretty nice Tut.
Click to expand...
Click to collapse
thats what i said, how you select the parms and fine controls like choosing the arm arch type. this doesnt do it. it copies the old config. which is excellent for new comers who wants to start to get their feet wet. but if you are building your custom kernel for arm or amd or i386 or mips? this is not at all helpful. if i were a new comer? i could have clicked on the thanks button. for an advanced user? this is a good read/timepass and nothing else. honestly because i got no control. :-s *Unacceptable*
and mithun you should also tell users how to include patches. if you write patches. how will you patch your kernel before you hit make and make bzimage? nope i am sorry this is good for a stock kernel. which has no info about patch and customization this is not complete. edit it and add more info. if you need help. feel free to ask. there are many kernel chaps here.
good luck mithun.
hope this helps.
thanks
-paul
p.s. i am pedantic at times and people hate me for that, but i am sorry i love being a pedantic moron.
Click to expand...
Click to collapse
Click to expand...
Click to collapse
this thread wanst clealry required man as xda-u already has a post regarding this .. so do something useful.most of the steps here are ready made kang stuff .
if my phone doesn't boot up what can be the cause? is there a specific file that i have to look at or not?
matt95 said:
if my phone doesn't boot up what can be the cause? is there a specific file that i have to look at or not?
Click to expand...
Click to collapse
We can never help without logs. But in this case logcat starts after the kernel has been loaded so you need to figure out what's wrong yourself
speed_bot said:
We can never help without logs. But in this case logcat starts after the kernel has been loaded so you need to figure out what's wrong yourself
Click to expand...
Click to collapse
Cause i'm trying to port the Ubuntu touch preview on my HTC One X but id remains on the bootanimation and i think that the problem is with the kernel itself
matt95 said:
Cause i'm trying to port the Ubuntu touch preview on my HTC One X but id remains on the bootanimation and i think that the problem is with the kernel itself
Click to expand...
Click to collapse
Boot anime can't work without a kernel
speed_bot said:
Boot anime can't work without a kernel
Click to expand...
Click to collapse
The problem is that it is stuck at the bootanimation, what can cause this? do you think it could be kernel related?
matt95 said:
The problem is that it is stuck at the bootanimation, what can cause this? do you think it could be kernel related?
Click to expand...
Click to collapse
First up. Does logcat work?
this is what i get
Code:
$ adb logcat
Unable to open log device '/dev/alog/main': No such file or directory
matt95 said:
this is what i get
Code:
$ adb logcat
Unable to open log device '/dev/alog/main': No such file or directory
Click to expand...
Click to collapse
Thanks for Education
How to build a CyanogenMod/Omni/Android Based Rom from source using only a Linux Terminal
A First for XDA I believe? So why this tutorial?
Originally when I was searching about for tutorials on how to build from source, they were all specific to those who use a GUI and this included downloading .zips with a browser and editing files through text editors, extracting files to certain locations and executing files through the file explorer such as "get-prebuilts.sh". There were some that used the linux terminal more then they needed too, this was helpful but not specific, this isn't going to be a tutorial like you see everywhere else, this will be made more specific to those who use either a remote machine, or people who want to use just the Linux terminal like a badass! This will have the commands I use, they may not be the most universally used or the simplest they can be but it's not broke so I shan't fix it! All these tutorials, for me, meant a lot of personal work google-ing and searching my way through commands, this was great as it has helped me learn a lot about Linux Terminal commands, but it has also caused me countless issues, such as uploading my final product and navigating around is a real pain in the ass. This meant it took me quite a while to get my first ever build using just the Linux terminal, and uploading it.
ForewordRead first
For this tutorial I will try not to make it too device/situation/rom specific because, then that means people have to make changes, which, we will have experienced never ends well, but I will have two variations of the command, the first command will be the generalised command using a HTML style coding for where you should make your changes, an example of this would be for the code <DeviceName>, you would replace it with your device name minus the <>signs (obviously). To then check if you had done it right, I will add in my device name which for this tutorial will be the LG Optimus 4xHD (codename p880). As this may become confusing with many <*> codes popping up, and there are many codenames and device names to keep up with, I will be adding a legend/key with some of the syntax I will be using and what it means, but also include some of the more popular codename and manufacturer names for those who do not know what they are. This tutorial will not tell you how to set up a remote machine, only use a Linux terminal and nothing else much. It may also include a hidden "GUI Cheat" for those with GUI to check if you have done a step correctly. This will be aimed at Ubuntu 13.10 64bit, as you need 64bit to compile (to my knowledge anyway)
Setting Up Your Build Environment
Okay so the easy-ish bit, this is mainly for people who either the administrator of their "Build Server" or Remote Machine as most "user-based" ones will almost always have theirs set-up for you. This will also be required by users who have set up Ubuntu/other Linux distribution on a host/local machine. You probably will not be able to do this on a user based Remote Machine anyway due to an absence of root access, if this is an issue and one is not setup and you do not have elevated privileges, email the corresponding admin for help! I can't help you here! So now down to business!Installing the required packages should be as follows, although, if they do not work just google it, I'm sure there are many tutorials with many ways to set up a build environment:
Code:
sudo apt-get install bison build-essential curl flex \
g++-multilib gcc-multilib git-core gnupg gperf \
lib32ncurses5-dev lib32readline-gplv2-dev lib32z1-dev \
libesd0-dev libncurses5-dev libsdl1.2-dev \
libwxgtk2.8-dev libxml2 libxml2-utils lzop \
openjdk-6-jdk openjdk-6-jre pngcrush schedtool \
squashfs-tools xsltproc zip zlib1g-dev
NOTEIf any GUI comes up for any installation (not sure, been a while since I did it) It should be pretty self-explanatory, for example arrow keys to navigate, enter to select an option etc.
Setting Up Repo's
Okay, so repo is a blanket term here. It can be split up in order to simplify things for the purpose of this tutorial. Repo is a package type thing of commands for handling your repo's. You will need this for Initialising repo's (Repo init) and for syncing sources (Repo sync). I will not be going into different flag meanings, only those which I use in this tutorial.
Installing the Repo package should be as follows, again google and let me know if I am wrong or it doesn't work!:
Code:
$ mkdir ~/bin
$ PATH=~/bin:$PATH
$ cd ~/bin
$ curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
$ chmod a+x ~/bin/repo
NOTEEach $ sign represents a line of command, so you should press enter between commands. For example "mkdir ~/bin <ENTER>" <ENTER> being the action by the user. GUI Users on a local machine may need to reboot at this time or redo it a couple of times until it works, remote users should just disconnect and reconnect again.
Setting up working folders and understanding Directories
Many tutorials will have this step differing from one another, this is because it's all down to personal preference. I prefer to have just the RomName because it's less work, but some prefer to have "Android/<ROMNAME>" or "Android/system/<ROMNAME>". This is because of Git, if a package is called Android_frameworks_Base, it represents the directory <ROMNAME>/frameworks/base/.
Setting up your working directories is dependent on which Rom you are building.
Generalised Code
Code:
$ mkdir ~/<ROMNAME>
$ cd ~/<ROMNAME>
Example Code
Code:
$ mkdir ~/carbon
$ cd ~/carbon
NOTEThis is creating a directory (mkdir) and navigating to it (cd) to go back when navigating use the "~" sign, it means "Home/<USERNAME>/" it skips some typing is all!
Initialising and Downloading the Repo
Okay so the repo part is perhaps the second longest of all processes you will have when building, it downloads the sources you need to compile with, this is approximately ~18gb maybe? Possibly? So you may need a fair partition or free space on your HDD/SDD for the building process as well.
Generalised Code:
Code:
repo init -u <GITHUB_LINK_IN_ROM_MANIFEST/ANDROID> -b <CORRESPONDING_BRANCH>
Specific Code:
Code:
repo init -u https://github.com/CarbonDev/android.git -b kk
NOTEAt this point you will see some code and some download stuff, it's just the repo fetching some stuff, at this point, you will be prompted to enter a name and an email, you will either be prompted to enter it, or you will be given the commands needed to do it, this needs to be done, once completed, re-initialize the repo. This will only happen on your first time.
Downloading the code:
Code:
repo sync -j#
NOTE This is going to start the downloading of the sources, the -f is a force flag, this will stop you from receiving any errors in your repo and will re rep sync the source. Other flags can be -j which specifies how many objects to download at once, I choose not to use it but the syntax is -j<NUMBER_OF_JOBS> for example -j10, this should be used in conjunction with the speed and bandwidth of the internet connection supplied, -j4 is default and using a higher flag for a better connection will speed things up considerably, be sure not to over do it thou. See this post for more details!
Setting Up For Your Device
Okay so one of the more important parts, and the parts people usually use the GUI and browsers etc. for, this will be how to do it without those aids. Well on the remote machine anyway, a host machine with GUI is probably needed for changes and links. This will set up vendor, kernel, and device tree.
General Code in order Kernel, Vendor, Device Tree:
Code:
$ mkdir -p kernel/<MANAFACTURER>/
$ cd kernel/<MANAFACTURER>/
$ git clone <KERNEL_GIT_LINK> <DEVICE_CODENAME/KENREL_NAME>
$ ls
$ cd ~/<ROMNAME>/vendor/
$ git clone <VENDOR_GIT_LINK> <MANAFACTURER>
$ ls
$ cd ~/<ROMNAME>/device
$ mkdir <MANAFACTURER>
$ cd <MANAFACTURER>
$ git clone <DEVICE_TREE_GIT_LINK> <DEVICE_CODENAME>
$ ls
$ cd ~/<ROMNAME>
Specific Code in order Kernel, Vendor, Device Tree:
Code:
$ mkdir -p kernel/lge
$ cd kernel/lge
$ git clone https://github.com/P880-dev/android_kernel_lge_x3.git x3
$ ls
$ cd ~/carbon/vendor
$ git clone https://github.com/P880-dev/proprietary_vendor_lge.git lge
$ cd ~/carbon/device
$ mkdir lge
$ cd lge
$ git clone https://github.com/P880-dev/android_device_lge_p880.git p880
$ ls
$ cd ~/carbon
NOTE There are shorter ways I'm sure, but this works. "ls" checks files in the directory just to double check you did it right. To find the git link it will be on the github of the tree on the left in a box. This only clones the default branch, if it's different you must fork the tree and click settings>default branch and change to the needed one, and use the git clone box from there. Device tree's can be edited per rom on github, or in terminal, for the purpose of using terminal, I'll add to this tutorial.
Making Changes to files
If you are building whichever rom was on your default branch then I guess this step isn't too important for you unless you want to check the files over or you want to edit other files like envsetup.sh to change the build tools versions. This will use the cd, ls, and pico function for editing files. To change configs and stuff in .mk files in device tree. Most people would use gui for file editing and that's why I am showing you the method to do so with ease from the Linux terminal.
General Code:
Code:
$ cd /device/<MANAFACTURER>/<DEVICE_CODENAME>/
$ ls
$ pico <FILENAME>
Specific Code:
Code:
$ cd device/lge/p880
$ pico cm.mk
NOTE This will open a text editor, the key at bottom represents ctrl + <LETTER> to do different functions. The main ones you use will be "ctrl x" because that is exit. After that you can either edit the name after the changes you made, for example changing CM to Carbon if you were building carbon. You can navigate to any directory, and pico <FILENAME> to edit it! It is easier to make these edits using github after forking a repo, usual changes need to be done to cm.mk and vendorsetup.sh, to know what needs changing, swap cm with the name of the rom, and check the vendor_rom of the rom for the config directories, for nfc and carbon, place a # at the start of the line, this is called hashing out. Change cm.mk when saving or by using mv <FILENAME> <NEW_FILENAME>.
Building the Rom
Okay so now that wasn't too bad was it? Setting up? Some devices that are officially supported do not need the above steps, but then again, if you was officially supported, why would you need to build? Anyways, this will show you how to get the pre-builts (if needed) and how to start the build of the rom. Cheated and used the GUI yet? If not, Good on ye! I will be adding the commands for adding legacy drivers and some other miscellaneous codes and commands in the next post! Including ccache for those who are on host/local machines rather than remote machines.
Generalised Code:
Code:
$ cd ~/<ROMNAME>/vendor/cm
$ . get-prebuilts.sh
$ cd ~/<ROMNAME>
Option #1: $ . build/envsetup.sh
Option #2: $ source build/envsetup.sh
[I]This last step varies between rom, so I will give the most generalised, check the manifest or building tutorial for the Rom to find out the way to build[/I]
$ brunch <DEVICE_CODENAME> -j<NUMBER_OF_CPU_CORES_+1>
Specific Code:
Code:
$ cd ~/carbon/vendor/cm
$ . get-prebuilts.sh
$ cd ~/carbon
$ . build/envsetup.sh
$ lunch
$ corresponding number
$ make carbon -j18
NOTE This will then start the build, this can take from 1-10hours to build depending on performance and other variables, it takes me ~1hour 15mins for a build of a KitKat Rom. Each ROM has a different build script, this means it can be a different chosen command each time, brunch is the most commonly used, check their manifest or look for a ROM specific building tutorial. -j# is the amount of jobs it will compile at one time, putting an insane number will not make it build faster. Put the amount of cores +1 to be safe. My server has 16cpu threads, and can handle -j18. A -j flag is not needed. Some build scripts support a time brunch <DEVICE_CODENAME> flag to time how long the build has taken. You may be prompted to enable colour display, enable, it looks pretty.
Completed Build, Now What?
So on this journey you have set up a build environment, set up your repo's, and device specific changes needed to buid and you have built a rom. So how do you access the build you just worked your ass off for? For the average user like me who does not have access to ftp, you can either use a program called plowshare as a non root user, or use a command line tool made by xda user GermainZ to upload to devhost using a python script. This is what we will set up next. Or you can use the GUI and extract the Rom and move to your phone straight, for us using remote machines we cannot do this, so we must upload.
Devhost Set-Up code (supports Anon Uploads):
Code:
$ cd ~/
$ git clone git://github.com/GermainZ/dev-host-cl.git dev-host-cl
$ cp dev-host-cl/devhost-py2.py ~/bin/devhost
$ chmod +x ~/bin/devhost
Uploading your ROM:
Code:
$ cd out/target/product/<DEVICE_CODENAME>/
$ ls
$ devhost upload -u <USERNAME> -p <PASSWORD> <ROM_ZIP_FILE_NAME>
Example:
Code:
$ cd out/target/product/p880
$ ls
For anon upload: $ devhost upload CARBON-KK-UNOFFICIAL.zip
For user upload: $ devhost upload -u username -p password CARBON-KK-UNOFFICIAL.zip
$ cd ~/carbon
Before building again make sure you either:
Code:
A: $ make clean
B: $ make clobber
To remove the directory fully:
Code:
$ cd ~/
$ rm -rf <ROM_FOLDER_NAME>
NOTEThis is installing the script for python 2, if you use python change "python-py2.py" to just "python.py". Do this if it doesn't work first time for you also. Plowshare will be in the miscellaneous post below this one for other codes for users who do not wish to use devhost. The link to the Rom will be on the bottom of the terminal after it is finished uploading. Some errors are server based, make sure you check the error if you are given one.
Did you make it?
Did you manage to complete it without using GUI and cheating? I bet you did! Post in the thread (Don't quote anything) saying you successfully completed the challenge of using no GUI and link to the finished product and I wall add your name to the "Hall of Fame" that will be placed either at the bottom of this thread or on the bottom of the next post! This should now help give you more experience in building from source with a Linux terminal for uses who have no previous experience, or are new to having access to a remote machine.
Foot Note
So here is my tutorial on how to build a rom from source using no gui and only the Linux terminal, it is a longer process but is the only process when using a remote machine. I hope I made it easy to understand and I hope you will stay to read the other miscellaneous codes and commands that are still to come on the next post. This tutorial was written up by scratch by me, I thank GermainZ for the devhost script, but I had no help in writing up this tutorial, I believe it may also be a first for xda as when I was searching, I didn't find one to follow. Commands in this are done the long way I know. I will explain why and add how to shorten them and some other shortcuts in the miscellaneous section at the bottom of this thread.
Fluoxetine.
Miscellaneous
Okay so as promised throughout the thread this section is going to contain other codes that may be useful to you (after gaining experience) including some shortcuts for coding that are really simple, it will also include other scripts such as plowshare for those who hate devhost (can't see why you would thou). I plan to continuously add to this part of thread with extra goodies, so keep posted here. For this purpose I will be using HIDE markers for each code as they are optional, and not for everyone. The key for the HTML style syntax I used for this thread (as self-explanatory as it is) will come at the bottom of my opening posts for this thread, kinda like to round it off you could say haha. Logically they should go at the top, however I am neither Spok nor Sheldon Cooper!
Legacy Folders (Display and Audio)
Code:
$ cd ~/<ROMNAME>/hardware/qcom/
$ git clone https://github.com/Evervolv/android_hardware_qcom_display-legacy.git display-legacy
$ cd ~/<ROMNAME/hardware/qcom/
$ git clone https://github.com/Evervolv/android_hardware_qcom_audio-legacy.git audio-legacy
$ cd ~/<ROMNAME>
Plowshare
Code:
$ wget http://plowshare.googlecode.com/files/plowshare4-snapshot-git20YYMMDD.GITHASH.tar.gz
$ tar xvzf plowshare4-snapshot-git20YYMMDD.GITHASH.tar.gz
$ cd plowshare4-snapshot-git20YYMMDD.GITHASH
$ make install PREFIX=/home/$USER
See this for more information on using plowhshare: https://code.google.com/p/plowshare/wiki/Readme4 [/CODE]
Shortcuts and other codes (WIP)
#Grouping Commands
Code:
$ mkdir cm && cd cm
&& is a grouping command, it literally means "And then"
#Making Paths
Code:
$ mkdir -p kernel/lge
$ cd kernel/lge
-p flag with mkdir creates a path instead of mkdir * cd * mkdir * cd
#Moving and Copying Files
Code:
$ cd ~/home && mv file.txt ~/home/documents
This will move the "file.txt" to your documents.
$ cd ~/home && scp file.txt ~/home/documents
This will copy the "file.txt" to your documents.
#Removing files and Directories
Code:
$ rm -rf ~/home/documents
This will remove the folder "documents"
$ cd ~/home/documents && rm file.txt
This will delete the file.txt
#Downloading Files/Patches
Code:
$ wget file.link
$ wget github.com/commit.patch
$ git apply commit.patch
Add .patch to the end of the commit to make a patch, navigate to the corresponding directory where it needs to be applied, wget it, and apply the name of it.
#SpeedTest
Code:
$ git clone https://github.com/sivel/speedtest-cli.git
$ cd speedtest-cli
$ ./speedtest_cli.py
This will test download and upload speeds.
[/HIDE]
[B]Device Codenames (Should always be lowercase) (WIP)[/B]
[HIDE] [CODE]
LG Optimus 4xHD p880
Nexus 4 Mako
Nexus 5 Hammerhead
Nexus 7 WiFi Flo
Nexus 7 LTE Deb
Manufacturer Names (Should always be lowercase) (WIP)
Code:
Sony
Lge
Samsung
Asus
Htc
Well, here we are, the Key
Code:
<ROMNAME> Name of the Rom, Carbon, Cm, AOKP, AOSP, Beanstalk, DU, There's plenty to choose from!
<DEVICE_CODENAME> Find the codename for your device from it's github as it is most likely going to be used there!
<GIT_LINK> The link to the corresponding package/manifest on github, google to find the roms github and then search it's repo's
<MANAFACTURER> Well, who made your phone? Check devices github for this one too!
<CORRESPONDING_BRANCH> The branch the manifest is on github, it will most likely include this with the repo link for your convenience
If I missed something, a friendly PM will do! Don't want any confuffled users here!
Hall of Fame for users who managed to follow this confusingly long guide!
Code:
Just Me for now, to get your name put here (will be tagged) just post in thread with an [B]"Hey Fluoxetine! I completed the building with Linux Terminal Challenge, Here is my finished product (Link to product) and I didn't cheat by using the GUI! You're the best!"[/B]
Closing Statement
Well guys, I thank you for taking the time to read and follow my tutorial on building from source using only the Linux terminal, this is a great way to build some experience, maybe gain some confidence in building from source and help you get some original work under your belt! To my knowledge, I believe this is the first tutorial which is specifying on how to build using just the Linux terminal and with some extra goodies! I will keep this updated as both Linux, and android evolve in order to keep it up to date, in mainstream with xda and to just make users life that little bit easier. I think this also proves, even noobs can turn things around by studying up, I managed to learn and write all of this within 3weeks of having an android phone! (16, had an iPhone before, big mistake) Would be great to have this featured on xda *Hint Hint* Vote for it! *Hint Hint*. Wonder if this could qualify for xda university material? Haha, anyways, hope this helped!
Fluoxetine.
Other Stuff No One Will Read
Thanks go out to Rom Dev Teams, xda for giving a place to post this, GermainZ for his devhost script, and Danny19901 for testing and proof reading basically anything and everything I shove infront of him! Haha!
Donations
I don't like Electronic Payments, the middle man always takes his cut and it's not fair, I don't want donations, cut out the relay and the time, PM with the amount you want to Donate, and I'll send you the link to an amazon item with my details for you to buy for me and have sent straight to me! Would be much appreciated! Will probably be food, I love food :'3
Requests for Rom builds or additions to this post
PM, PM, PM, I do not care about getting messages (In fact it makes me feel loved) So do not be scared to request a Rom build, or request I add something I have missed out from this tutorial! All requests welcome, however this is not going to be a Q&A Thread with compilation issues, it is purely for the knowledge of how to compile, if you have problems with setting up/changing files/navigating, by all means post, all "Error" posts that are not specific to me will be cleaned because I probably won't know how to fix ^.^
Some Hardware Issues
Okay so some of users out there will be thinking "Hmm, is my hardware good enough to build a whole rom with, I can't even run battlefield or -otherGameHere-. The short answer to this is that you probably can, it may just take a little while longer for you, I think you need to have a 64bit machine full stop. However you also need RAM, a fair bit of it, at least 4gb if you plan to compile and nothing else. If not, you can compile on 1ghz, just will take a while and may freeze so keep checking and make the terminal as small as you can. SWAP May be your best friend for those with GUI, this doesn't apply for Remote Machine Users. You can format a partition on your HDD/SSD, or on a USB Stick (preferred) as a Linux Swap partition of 4gb+ to use as extra Rom, just format and swap-on using Gparted which should be installed on Ubuntu standard.
GPL, Disclaimer, And Goodbye
So here we go, if you do build a Rom following this tutorial, be sure to release/add the kernel source on github to your thread in order to be compliant with the GPL, otherwise you may be in a spot of trouble, that being said I am not responsible for anything that happens to you/your machine/your phone/tab/anything really, unless this wins you the lottery or a similar payload, in which case I love you and we should get married (No Homo) haha.
Additions, Edits, Other stuff that doesn't fit anywhere else really haha
Okay so what about the other types of cool things you can do to make this maybe a little bit easier? Well even like you guys probably are i am also still learning how to properly use git, and linux etc. so here i will be adding any of the cool things i learn. This will be great as a reference for me to look back at resources and recollect any information that may filter out of my brain, but may also be useful for you to learn at the same rate as i do! So check it out
Okay so today (18.02.14) i found a cool little trick using .sh files to help with the whole setting up malarcky and can make it easier if you plan to build the same rom on a weekly/nightly basis.
Okay, so what you can do whilst in the terminal is to add a file on a text basis, you can do this by running
Code:
$ pico setup.sh
This will open up the text editor on a blank document in which you can edit yourself, this is what you need, to begin with you should probably aim to write something for on screen guide/a type of ui just to let you know whats happening, this will work like a build script does, infact the same method can be applied there. Okay so whatneeds to go into it? First you want the print, this is displayed using a command known as echo.
Code:
echo 'Whatever you want to write'
This will displayed when you execute the script. So what next? Well you can choose to have it run a ui print after each action or just once at the start and then leave it to default ui to guide you. So how do you set the actions you want to do? Simply just start writing the commands!
Code:
echo 'setting up'
mkdir -p kernel/<MANUFACTURER> && git clone <KERNEL_CLONE_LINK> <CODENAME> && cd ~/<ROMNAME>/vendor && git clone <VENDOR_CLONE_LINK>
<MANUFACTURER> && cd ~/<ROMNAME> && mkdir <MANUFACTURER> && cd <MANUFACTURER> && git clone <DEVICE_CLONE_LINK> <CODENAME> && cd
~/<ROMNAME>/vendor/cm && sh get-prebuilts && cd ~/<ROMNAME> && . build/envsetup.sh && breakfast <CODENAME> && brunch <CODENAME> -j7 && cd
~/<ROMNAME>/out/target/product/<CODENAME>/
This will set up the kernel, vendor, and device and start building the rom, you may want to remove/add steps but that is how you can do it if you want to build multiple times, this can take a while to ammend for each different rom you use but it works like a dependencies file. To add UI after each one just add it after each step (short version example to follow)
Code:
echo 'setting up'
Mkdir -p kernel/<MANUFACTURER>
echo 'Cloning Kernel now'
Save this file with ctrl +w and save as a .sh file. Once this is done and in your root, working directory you can simply do:
Code:
. setup.sh
Or whichever you set it as!
NOTE
This may not always work, but it is a good way to set up quickly and efficiently, if a step goes wrong it is best to continue manually rather then re-executing the file, for those with GUI, you can just double click the sh file, this does include the prebuilts from CM, you cann a step by using the && command or create multiple scripts to run one after the other to do a separate job. This does require default branches on github to be the ones you are going to be using. The one i use as an example for carbon is as follows
Code:
echo "Setting up Kernel, Vendor, and Device ready to build Carbon Rom"
mkdir -p kernel/lge && cd kernel/lge && git clone https://github.com/P880-dev/android_kernel_lge_x3.git x3 && cd ~/carbon/vendor && git clone https://github.com/P880-dev/proprietary_vendor_lge.git lge && cd ~/carbon/device && mkdir lge && cd lge && git clone https://github.com/Fluoxetine/android_device_lge_p880.git p880 && cd ~/carbon && . build/envsetup.sh && lunch p880 && make carbon -j30 && cd out/target/product/p880/
Great job mate very useful thread
Sent from my LG-P880 using Tapatalk
Nice work mate! I'm a noob but very interested in these type of things and this looks very useful.I'll see if I can do a 'Lil something with this and let you know if it works out!kudos my man!
Sent from my HTC One using xda app-developers app
nice very good thread for our p880 maybe there will not be more q's about bugs and other stuffXD
i will try this challange later i am tired a bit of building roms by myself, because i have lot of work..
btw i didnt know there are some gui tools for building romsXD
If I may add a suggestion repo sync -f is not the best idea (at least for the first sync), as if a repo can't be downloaded, it just gets skipped, but the repo script still does on syncing, which means you may be missing some source code in case something goes wrong.
So repo sync should be better, at least for the initial sync. Also, the -j flag can speed up things extremely, on systems with a good internet connection, the default is -j4 (if you don't specify another value), but if you run this on a speedy connection, it will slow the DL extremely down.
I, for one, am running -j20 on my home connection (~1.2MB/s DL), but -j80 on a server, I have access to (dunno the exact max speed, but it's fast enough to sync CM in under 7 minutes ). -j4 would take an eternity, as it cannot use the entire bandwidth of the server
BTW, the codenames and manufacturers usually are all lowercase
laufersteppenwolf said:
If I may add a suggestion repo sync -f is not the best idea (at least for the first sync), as if a repo can't be downloaded, it just gets skipped, but the repo script still does on syncing, which means you may be missing some source code in case something goes wrong.
So repo sync should be better, at least for the initial sync. Also, the -j flag can speed up things extremely, on systems with a good internet connection, the default is -j4 (if you don't specify another value), but if you run this on a speedy connection, it will slow the DL extremely down.
I, for one, am running -j20 on my home connection (~1.2MB/s DL), but -j80 on a server, I have access to (dunno the exact max speed, but it's fast enough to sync CM in under 7 minutes ). -j4 would take an eternity, as it cannot use the entire bandwidth of the server
BTW, the codenames and manufacturers usually are all lowercase
Click to expand...
Click to collapse
Added your changes, and some suggested by @me4488 so thanks for that guys, in addition to this and to kinda bump the thread i did add another
Additions, Edits, Other stuff that doesn't fit anywhere else really haha
Click to expand...
Click to collapse
Section with a build script type creating thing in it for users to muck about with
Hope this is of a help to you all!
Damn this is a big thread
it look really great but... i would like to use the offical tree and blobs...... i got a lot of it done oke but i seems to get lost in finding the "offical" vendor in step setting up for your device.
could any body help me out? just trying to compile offical cyanogenmod just to try. and to understand how it all works.
ok i got something starting
but i get this message
You are attempting to build with an unsupported JDK. will find and try to install the right JDK
moneyvirus said:
[..]
but i get this message
You are attempting to build with an unsupported JDK. will find and try to install the right JDK
Click to expand...
Click to collapse
what's the output of?
Code:
java -version
laufersteppenwolf said:
what's the output of?
Code:
java -version
Click to expand...
Click to collapse
It seems he is using java1.7 .. He must change all things to work under 1.6 but i dont remember how XD it is explained somewhere at xda university
Sent from my LG-P880 using xda app-developers app
gerciolisz said:
It seems he is using java1.7 .. He must change all things to work under 1.6 but i dont remember how XD it is explained somewhere at xda university
Sent from my LG-P880 using xda app-developers app
Click to expand...
Click to collapse
well apperently i'm not using java 1.7.
java version "1.6.0_27"
OpenJDK Runtime Environment (IcedTea6 1.12.6) (6b27-1.12.6-1ubuntu0.12.04.4)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
this is what i got @laufersteppenwolf
moneyvirus said:
well apperently i'm not using java 1.7.
java version "1.6.0_27"
OpenJDK Runtime Environment (IcedTea6 1.12.6) (6b27-1.12.6-1ubuntu0.12.04.4)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
this is what i got @laufersteppenwolf
Click to expand...
Click to collapse
I mean there was a command which shows every detail about wchich things are using which java.. Sometimes you can have java 1.6 installed but some parts of system are using 1.7.. Ill try to find it
Edit. I remember it was in compiling cm11 thread somewhere on xda.
There was something about setting up java alternatives AS far AS i remember
Sent from my LG-P880 using xda app-developers app
Nice tutorial If i was a developer of roms o would definetely use your way, i like the old school linux throught terminal exploring
Sent from my LT22i using xda app-developers app
moneyvirus said:
well apperently i'm not using java 1.7.
java version "1.6.0_27"
OpenJDK Runtime Environment (IcedTea6 1.12.6) (6b27-1.12.6-1ubuntu0.12.04.4)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
this is what i got @laufersteppenwolf
Click to expand...
Click to collapse
Alright, then just ignore the error It's saying it'd be the wrong java version, because you're using openJDK, and not oracle, but openJDK is just as fine as oracle
gerciolisz said:
I mean there was a command which shows every detail about wchich things are using which java.. Sometimes you can have java 1.6 installed but some parts of system are using 1.7.. Ill try to find it
Edit. I remember it was in compiling cm11 thread somewhere on xda.
There was something about setting up java alternatives AS far AS i remember
Sent from my LG-P880 using xda app-developers app
Click to expand...
Click to collapse
Java 7 (1.7) is also compatible. It isn't officially supported, and you might run into problems compiling pure AOSP, but other custom ROMs should compile just fine
Thanks for the feedback i'm still having 1 question the Vendor, the unoffical tree is completly clear but i can't find it in the offical source so i mean something like
$ git clone https://github.com/P880-dev/proprietary_vendor_lge.git lge but than on the offical cyanogenmod github.
moneyvirus said:
Thanks for the feedback i'm still having 1 question the Vendor, the unoffical tree is completly clear but i can't find it in the offical source so i mean something like
$ git clone https://github.com/P880-dev/proprietary_vendor_lge.git lge but than on the offical cyanogenmod github.
Click to expand...
Click to collapse
here you go:
Code:
cd vendor
git clone [email protected]:TheMuppets/proprietary_vendor_lge.git -b cm-11.0 lge
croot
ok i found it..
source: http://forum.xda-developers.com/nexus-4/general/guide-cm11-how-to-build-cyanogenmod-11-t2515305
Verify the symlinks. Javac, Java, Javaws, Javadoc, Javah, Javap and Jar should all point to the right Java location and version:
Code:
Code:
$ ls -la /etc/alternatives/java* && ls -la /etc/alternatives/jar
If they are pointing to the wrong versions you have to change that to OpenJDK6.
Select the default Java version for your system:
Code:
Code:
$ sudo update-alternatives --config javac
$ sudo update-alternatives --config java
$ sudo update-alternatives --config javaws
$ sudo update-alternatives --config javadoc
$ sudo update-alternatives --config javah
$ sudo update-alternatives --config javap
$ sudo update-alternatives --config jar
That's it.
Click to expand...
Click to collapse
when i had problems with compiling and got some famous errors i changed to this OpenJDK6 with this method and it solved it so if is not solution for your problem maybe its helpful for others
when i was compiling some time ago i must read few compiling threads to make it work and understand it
ok probbably this is a really stupid from my side but this is what i did.
and probbably i'm too noob for this, but i tried this:
i downloaded by example rastakat.
downloaded all the steps... without any error.
But in the last step when i type lunch and i have to choose wich version i would like to compile i can't find P880......
i have the feeling i have to edit some stuff but to be honest i don't know that yet....
will try later on.
maybe you need custom local manifest to p880-dev sources or official p880 sources..
moneyvirus said:
ok probbably this is a really stupid from my side but this is what i did.
and probbably i'm too noob for this, but i tried this:
i downloaded by example rastakat.
downloaded all the steps... without any error.
But in the last step when i type lunch and i have to choose wich version i would like to compile i can't find P880......
i have the feeling i have to edit some stuff but to be honest i don't know that yet....
will try later on.
Click to expand...
Click to collapse
You've set yourself a pretty hard task, first of all, compiling a yet unsupported ROM, but mostly a (more-less) AOSP ROM...
this means you can't use lunch, but you need to do the following:
Download the p880-dev device tree, kernel and vendor blobs
Edit the "inherit" paths inside the .mk files of the device tree
Without (except for the above mentioned) changes, you can run "lunch cm_p880-eng"
Then you can make -j<your_value> bacon
Hello to everyone, my name is Tkd-Alex and I'm Italian :good: . Excuse me if I do English errors.
I woult to build the Cyanogenmod 12 for Xperia T mint by a source code of CM. Thanks to the cm wiki as I understand how this works. But I've errors with it! I hope you can help me. :angel:
Let's start! :laugh:
The first step to me is prepare the enviroment to build the rom. I've installed Ubuntu 13.10 64bit inside a Virtual Machine and I've installed Java and other tools/packages for building on it.
After basic installations I set up the repo command.
Code:
mkdir ~/bin && curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > ~/bin/repo && chmod a+x ~/bin/repo
Code:
sudo nano ~/.bashrc
Add at the end line: export PATH=~/bin:$PATH save and restart the bash
Code:
source ~/.bashrc
The second step is the Building.
Create the folder.
Code:
mkdir ~/cm12
Move in to the folder
Code:
cd ~/cm12
Initialize the CyanogenMod source repository
Code:
repo init -u git://github.com/CyanogenMod/android.git -b cm-12.0
Sync the repo
Code:
repo sync
ERROR!
After repo sync I'll get prebuilt apps but when I send the command:
Code:
./get-prebuilts
I get the following error:
Code:
bash: ./get-prebuilts: File o directory not existing
Can anyone help me? @GabMus @updateing @WhiteNeo @Chefov01
You are not in the right directory.. "get-prebuilts" is an executable file that isn't present in the cm12 root directory.
Type this in Terminal before "./get-prebuilts":
Code:
cd ~/cm12/vendor/cm
However, afaik those prebuilt apps are no longer needed to build cm12. They have been removed from the build process some days ago.
WhiteNeo said:
You are not in the right directory.. "get-prebuilts" is an executable file that isn't present in the cm12 root directory.
Type this in Terminal before "./get-prebuilts":
Code:
cd ~/cm12/vendor/cm
However, afaik those prebuilt apps are no longer needed to build cm12. They have been removed from the build process some days ago.
Click to expand...
Click to collapse
bro is there any chance you could make a build for us T users? at least for testing purposes, im sure our developers would appreciate it a lot as well and would help as a starting point.. :-/
Not working.
WhiteNeo said:
You are not in the right directory.. "get-prebuilts" is an executable file that isn't present in the cm12 root directory.
Type this in Terminal before "./get-prebuilts":
Code:
cd ~/cm12/vendor/cm
However, afaik those prebuilt apps are no longer needed to build cm12. They have been removed from the build process some days ago.
Click to expand...
Click to collapse
Thank for reply, but I know that you say :highfive: . I had already tried the command ./get-prebuilts in the folder /cm12/vendor/cm but I forgot to say in the post. Now I'll try to ignore the prebuilds and download the muppets repo, extract the zip, rename in sony and copy the folder in /cm12/vendor. After that I will go in the root folder
Code:
croot
and try the brunch command
Code:
brunch mint
Is that correct?
tkd-alex said:
Thank for reply, but I know that you say :highfive: . I had already tried the command ./get-prebuilts in the folder /cm12/vendor/cm but I forgot to say in the post. Now I'll try to ignore the prebuilds and download the muppets repo, extract the zip, rename in sony and copy the folder in /cm12/vendor. After that I will go in the root folder
Code:
croot
and try the brunch command
Code:
brunch mint
Is that correct?
Click to expand...
Click to collapse
Well.. No.
For CM11 it would work, but CM12 needs different device files than the ones downloaded by "breakfast mint" or "brunch mint"..
I'm not quite sure it compiling Lollipop is a good start for learning android development if you've never built a rom before.
WhiteNeo said:
Well.. No.
For CM11 it would work, but CM12 needs different device files than the ones downloaded by "breakfast mint" or "brunch mint"..
I'm not quite sure it compiling Lollipop is a good start for learning android development if you've never built a rom before.
Click to expand...
Click to collapse
Infact with the breakfast command I've this:
Code:
[email protected]:~/cm12$ breakfast mint
including vendor/cm/vendorsetup.sh
build/core/product_config.mk:239: *** _nic.PRODUCTS.[[device/sony/mint/cm.mk]]: "device/sony/common/resources.mk" does not exist. Arresto.
Device mint not found. Attempting to retrieve device repository from CyanogenMod Github (http://github.com/CyanogenMod).
Found repository: android_device_sony_mint
Default revision: cm-12.0
Checking branch info
CyanogenMod/android_device_sony_mint already exists
Syncing repository to retrieve project.
Fetching project CyanogenMod/android_device_sony_mint
Fetching projects: 100% (1/1), done.
Repository synced!
Looking for dependencies
Done
build/core/product_config.mk:239: *** _nic.PRODUCTS.[[device/sony/mint/cm.mk]]: "device/sony/common/resources.mk" does not exist. Arresto.
** Don't have a product spec for: 'cm_mint'
** Do you have the right repo manifest?
We can not do anything?
tkd-alex said:
Infact with the breakfast command I've this:
Code:
[email protected]:~/cm12$ breakfast mint
including vendor/cm/vendorsetup.sh
build/core/product_config.mk:239: *** _nic.PRODUCTS.[[device/sony/mint/cm.mk]]: "device/sony/common/resources.mk" does not exist. Arresto.
Device mint not found. Attempting to retrieve device repository from CyanogenMod Github (http://github.com/CyanogenMod).
Found repository: android_device_sony_mint
Default revision: cm-12.0
Checking branch info
CyanogenMod/android_device_sony_mint already exists
Syncing repository to retrieve project.
Fetching project CyanogenMod/android_device_sony_mint
Fetching projects: 100% (1/1), done.
Repository synced!
Looking for dependencies
Done
build/core/product_config.mk:239: *** _nic.PRODUCTS.[[device/sony/mint/cm.mk]]: "device/sony/common/resources.mk" does not exist. Arresto.
** Don't have a product spec for: 'cm_mint'
** Do you have the right repo manifest?
We can not do anything?
Click to expand...
Click to collapse
Maybe you can check if some entries are missing in local_manifest (e.g. the sony common repo it listed there) mine is here: http://forum.xda-developers.com/showpost.php?p=57492538&postcount=52
And it's not a nice idea to learn building Android on T & CM12. It's not easy as CM11, lots of patches have to be applied to make it work...
A beginners guide to building and modifying a nexus 4 lollipop* kernel from source.
*currently 5.0.1Disclaimer
I am not a developer, nor am I an expert. All the information in here I have gleaned from other sources, credited where possible, so it may not be correct and almost certainly isn't the 'best' way to do things. But it works for me. I hope it works for you but there's no guarantee. Use at your own risk
Assumptions
You have access to a computer running Ubuntu - other distros will probably work but this is the one I'm using. You'll need a basic understanding of the Linux command line including, but not limited to, ls, cp, cd, mkdir, make, ~, sudo, nano and so on.
You'll need to know how to use adb & fastboot to copy stuff into and out of your Nexus 4
A basic undersanding of Git is REALLY helpful if you want to modify your kernel. You'll be able to get by using the comands listed but you really need to have a basic understanding of what Git does if you're going to proceed.
CONTENTS
Initialise your build environment
Downloading the sources
Toolchain
Building
Creating a boot.img
A bit more about Git
Modifying kernels (how I got DT2W working)
Making a flashable zip
Initialise your build envronment
The information for this stage came from: here
I installed Ubuntu 14.04.1 LTS from a scratch. I used VM ware on a Windows laptop but any Linux environment can probably be made to work. So, to start, do an update just to be sure, then install the packages you'll need.
Code:
# sudo apt-get update
# sudo apt-get install bison g++-multilib git gperf libxml2-utils
# sudo apt-get install libncurses5-dev:i386
# sudo apt-get install lib32ncurses5-dev
# sudo apt-get install build-essential kernel-package
Downloads
Most of the really helpful information I've used came from here
I've updated the information slightly and changed the device from Flo to Mako but Pete's page is well worth reading for more background information than I've included here.
To download the source into a 'kernel' folder
Code:
# mkdir ~/android
# cd ~/android/
# git clone https://android.googlesource.com/kernel/msm.git kernel
# cd kernel/
# git branch -a
will show you all the current branches of Mako kernels, choose the one you want and checkout that one.
Code:
# git checkout android-msm-mako-3.4-lollipop-release
Now you need to find out exactly which kernel to build. The 'official' method is here
but that involves a significant download for just a few bytes so I suggest you use the following trick. Go to the pre-built kernel you want to copy here
and you wll see the first line after the header is:-
"16e203d lowmemorykiller: enhance debug information"
You need to make a note of the first seven characters, in this case 16e203d.
Next you need to use Git to create a new branch for our specific kernel. I've called it 'android-lollipop-release'.
Code:
# git checkout -b android-lollipop-release 16e203d
This will extract the source for the kernel we're going to build.
Toolchain
I'm using the stock toolchain (thanks @zaclimon) but will add an alternative suggested by @aviz1911 as time allows.
I'm going to install the toolchain in /usr/local/share but there are other places you could sensibly put it.
Code:
# cd /usr/local/share
sudo git clone [url]https://android.googlesource.com/platform/prebuilts/gcc/linux-x86/arm/arm-eabi-4.7[/url]
Export the path to the toolchain and check it works. Note these exports only work for the current session, if you want to add permanently put it in your .bashrc or .profile
Code:
# export PATH=$PATH:/usr/local/share/arm-eabi-4.7/bin
# cd ~
Test it works with
Code:
# arm-eabi-gcc --version
Now you need to tell the system we want to cross compile.
Code:
# export ARCH=arm
# export SUBARCH=arm
# export CROSS_COMPILE=arm-eabi-
Building
Now you're ready to start.
Code:
#cd ~/android/kernel
# make mako_defconfig
You'll get some warnings like this which you can ignore
warning: (ARCH_MSM_KRAITMP && ARCH_MSM_CORTEX_A5) selects HAVE_HW_BRKPT_RESERVED_RW_ACCESS which has unmet direct dependencies (HAVE_HW_BREAKPOINT)
Code:
# make menuconfig
this is where you can make some changes if you like, we're going to change just the name. Choose General Setup ---> then select
(-perf) Local version - append to kernel release
and change perf to anything you like, I'll use dt2w
Save and exit
Code:
# make -j2
where 2 is twice the number of cores on your machine - there's just one processor on my VM but could be many more on yours. It takes more than half an hour on my machine. Then you should see
Code:
Kernel: arch/arm/boot/zImage is ready
Ta Daaaaa - you have built a kernel - now you need to pack it for testing on your phone.
Creating a boot.img
Again I'm going to use Pete's blog post as my guide but omit some details and just get the job done. I'm not going to explain all the steps, you'll have to investigate yourself if you want to understand more.
Code:
# cd ~/android
# git clone https://github.com/pbatard/bootimg-tools.git bootimg-tools
# cd bootimg-tools/libmincrypt/
# gcc -c *.c -I../include
# # cd ../mkbootimg
# gcc mkbootimg.c -o mkbootimg -I../include ../libmincrypt/libmincrypt.a
# sudo cp mkbootimg /usr/local/bin/
# gcc -o unmkbootimg unmkbootimg.c
# sudo cp unmkbootimg /usr/local/bin/
You need an original boot img to copy so you can insert your new kernel into it. Download the factory image.
Code:
# mkdir ~/android/boot
# cd ~/android/boot
# wget https://dl.google.com/dl/android/aosp/occam-lrx22c-factory-86c04af6.tgz
# tar -xvf occam-lrx22c-factory-86c04af6.tgz
# cd occam-lrx22c/
# unzip occam-lrx22c-factory-86c04af6.zip
# cp boot.img ../
# cd ~/android/boot
Now it's time to unpack the original boot image. unmkbooting will tell you all the parameters you need to repack the boot image with your new kernel inside.
Code:
# unmkbootimg -i boot.img
kernel written to 'kernel' (6009416 bytes)
ramdisk written to 'ramdisk.cpio.gz' (490557 bytes)
To rebuild this boot image, you can use the command:
mkbootimg --base 0 --pagesize 2048 --kernel_offset 0x80208000 --ramdisk_offset 0x81800000 --second_offset 0x81100000 --tags_offset 0x80200100 --cmdline 'console=ttyHSL0,115200,n8 androidboot.hardware=mako lpj=67677 user_debug=31' --kernel kernel --ramdisk ramdisk.cpio.gz -o boot.img
Code:
# cp ~/android/kernel/arch/arm/boot/zImage ~/android/boot/
Repack your new boot image with your new kernel using the information from unmkbootimg
Code:
mkbootimg --base 0 --pagesize 2048 --kernel_offset 0x80208000 --ramdisk_offset 0x81800000 --second_offset 0x81100000 --tags_offset 0x80200100 --cmdline 'console=ttyHSL0,115200,n8 androidboot.hardware=mako lpj=67677 user_debug=31' --kernel zImage --ramdisk ramdisk.cpio.gz -o new_boot.img
Nore that kernel has been changed to zImage and output file has been changed new_boot.img Now it's time to test your new_boot.img by rebooting your phone into bootloader and reboot with the new img.
DO NOT FLASH THE NEW IMAGE.
fastboot boot new_boot.img NOT fastboot flash boot new_boot.img
If all has gone well your phone will now boot with your new kernel. If something has gone wrong just reboot the phone and you'll be back to where you started. If it has all worked then you can flash the new boot image and use that.
A bit more about Git
If like me, you know nothing about Git, then this bit of the guide is for you. If you have basic understanding this will be too simple for you and you'll have to skip this bit and look elsewhere. If you have a basic understanding of any version control software you won't need this either as the necessary commands to complete the next step will be self explanatory.
Jump to the next stage here
Git is a version control system. To understand what it does at a most basic level follow these steps
Code:
# mkdir git_test
# cd git_test
# git init
Tell git who you are. You don't need the inverted commas, just an email address and a name. Keep this information for when/if you open a Github account.
Code:
# git config --global user.email "[email protected]"
# git config --global user.name "Your Name"
create a text file called 'text' with a single line of text that says "This is the first line"
add this file to your git
Code:
# git add text
commit the change with a message
Code:
git commit -m "first line"
create a new branch (checkout -b both creates and makes the new branch current)
Code:
git checkout -b newbranch
edit the 'text' file by adding another line "this is the second line"
add and commit the change to git
Code:
# git add text
# git commit -m "second line"
Then examine the text file, as you might expect it looks like this
Code:
# cat text
this the first line
this is the second line
but if we now go back to the master branch and checkout THE SAME file, we get a different result
Code:
# git checkout master
cat text
this the first line
The second line is not present because it was only added to the 'newbranch' branch. This, it appears to me is the essence of git, it changes files depending on which branch you're viewing them from.
Now we're going to look at how we can use git to extract files from someone else's repository in order to get the files we want for our needs.
There are loads of guides that help you to learn more, I found this video particularly helpful.
https://www.youtube.com/watch?v=1ffBJ4sVUb4
Still to come
Modifying kernels (how I got DT2W working)
Edit:- It's going to be a while before I complete this section as although I managed to build a working kernel I'm pretty sure I didn't do it the 'right' way so I'm reading the Git Pro book.
Will be back later. .. . .
Awesome guide dude. This will surely help a lot of people
Nice
Nice guide, wish you'd have written it a week earlier
Anyways, what i'd really like to know, is how to patch the Linux version properly, because my attempts lead to break the kernel in the process. Didn't get beyond 3.4.11 :/
Hope you can help me out there, buddy.
How to create a zip ?
I have been looking into this and created a kernel a few days ago. But i want to share it.
For that ill have to create a zip. I have searched for it. I think its done using anykernel template.
The issuse is can i use the certificates in the meta-inf folder and the update-binary that is 4 years old ?
Or should i just unzip a kernel , modify the script and place my boot.img.
@aviz1911
Unzipping and re zipping is pretty easy, I'd do that.
@Nicknoxx How's the reading up on git going? Any tips on enabling dt2w would be much appreciated. I've been trying but can't seem to get it to work
I'm really new at the Kernel stuff and just wanted to build stock with dt2w as my first project.
Thanks for the first part of the guide
Wow nice guide sir, i'll try it later
Great Guide!
Thanks Mate!!
what all lines or links should i have to modify if i am building kernel for my device oneplus one lollipop ?
@Nicknoxx
Also @Nicknoxx one can use the -b argument with git while cloning so git just downloads a single branch of the kernel source, this'll save bandwidth and time to some extent
Like
git clone https://android.googlesource.com/kernel/msm.git -bx kernel
Replace x with desired branch name
Click to expand...
Click to collapse
̿ ̿̿’̿’\̵͇̿̿\з==(*͡° ͜ʖ ͡°)==ε/̵͇̿̿/’̿’̿ ̿ ̿̿*
---------- Post added at 08:26 PM ---------- Previous post was at 08:21 PM ----------
Droid.Riz said:
what all lines or links should i have to modify if i am building kernel for my device oneplus one lollipop ?
@Nicknoxx
Click to expand...
Click to collapse
Use the cm kernel source from github.com/CyanogenMod in git clone
Just type
git clone https://github.com/CyanogenMod/android_kernel_oneplus_msm8974 kernel
Click to expand...
Click to collapse
And for compiling
make bacon_defconfig
Click to expand...
Click to collapse
̿ ̿̿’̿’\̵͇̿̿\з==(*͡° ͜ʖ ͡°)==ε/̵͇̿̿/’̿’̿ ̿ ̿̿*
KNIGHT97 said:
Also @Nicknoxx one can use the -b argument with git while cloning so git just downloads a single branch of the kernel source, this'll save bandwidth and time to some extent
Like
̿ ̿̿’̿’\̵͇̿̿\з==(*͡° ͜ʖ ͡°)==ε/̵͇̿̿/’̿’̿ ̿ ̿̿*
---------- Post added at 08:26 PM ---------- Previous post was at 08:21 PM ----------
Use the cm kernel source from github.com/CyanogenMod in git clone
Just type
And for compiling
̿ ̿̿’̿’\̵͇̿̿\з==(*͡° ͜ʖ ͡°)==ε/̵͇̿̿/’̿’̿ ̿ ̿̿*
Click to expand...
Click to collapse
thanks a lot for quick reply i will start it today itself @ night.
after successfully compiling i will reply here
Nice guide. I ad it to my collection. I mis the part about building the modules. For wifi and so on. I think the command is "make modules"
Maby ad some info about updating a kernel. ICS to JB. KK to LP and sow on.
How about the command to clean after building?
[email protected] said:
Nice guide. I ad it to my collection. I mis the part about building the modules. For wifi and so on. I think the command is "make modules"
Maby ad some info about updating a kernel. ICS to JB. KK to LP and sow on.
How about the command to clean after building?
Click to expand...
Click to collapse
Executing the make -j# command automatically builds your modules along with the Zimage, you'll just need to read last few lines in terminal to know the modules and where they reside
̿ ̿̿’̿’\̵͇̿̿\з==(*͡° ͜ʖ ͡°)==ε/̵͇̿̿/’̿’̿ ̿ ̿̿*
Hi guys,
How i can implement this mod/patch in my kernel??
http://forum.xda-developers.com/android/software-hacking/kernel-tap2unlock-tap2wake-feature-t2965344