[Guide] Quick start compiling guides-cm9-kernels - Motorola Photon 4G

First of all this is not a hand holding thread. this is only for people serious about compiling. compiling is actually pretty easy, its debugging, adding features, porting, and cleaning up for mass use thats a little more difficult.
pre-setup
get linux, ubuntu is preferred and the most supported. you'll need around 25gb free or more. wubi works but make sure its big enough. The best setup is of course a real linux setup. personally i have a 100gb ext4 partition with ubuntu 11.10 and a second 100gb ext4 partition just for compiling.
im not going into how to get ubuntu running or any of that as you shouldnt try compiling if you are unable to install ubuntu using google. hint dual boot if you want to keep windows.
setup
most of what we will be doing will be done in the terminal. if you dont like the terminal or dont know how to use it. go away, seriously.
you need to find and install
Python 2.5 -- 2.7, which you can download from python.org.
next copy paste this into terminal
Code:
sudo add-apt-repository "deb http://archive.canonical.com/ lucid partner"
sudo apt-get update
sudo apt-get install sun-java6-jdk
sudo apt-get install git
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 lib32readline-gplv2-dev lib32z-dev \
libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown \
libxml2-utils xsltproc
sudo ln -s /usr/lib/i386-linux-gnu/libX11.so.6 /usr/lib/i386-linux-gnu/libX11.so
ok now that you have the basics its time to make your life easier.
optional only if you have at least 10+gb free
Code:
Setting up ccache
You can optionally tell the build to use the ccache compilation tool. Ccache acts as a compiler cache that can be used to speed-up rebuilds. This works very well if you do "make clean" often, or if you frequently switch between different build products.
Put the following in your .bashrc or equivalent.
export USE_CCACHE=1
By default the cache will be stored in ~/.ccache. If your home directory is on NFS or some other non-local filesystem, you will want to specify the directory in your .bashrc as well.
export CCACHE_DIR=<path-to-your-cache-directory>
The suggested cache size is 50-100GB. You will need to run the following command once you have downloaded the source code.
prebuilt/linux-x86/ccache/ccache -M 50G
This setting is stored in the CCACHE_DIR and is persistent.
all right your all set up lets get some source
getting source
repo init -u git://github.com/CyanogenMod/android.git -b ics
repo sync
git clone [email protected]hoton-dev-team/sunfire.git -b ics device/moto/sunfire/
git clone [email protected]hoton-dev-team/proprietary_vendor_motorola.git -b ics vendor/moto/sunfire/
./vendor/cm/get-prebuilts
note you may have issues with syncing
alright on to building
building
several ways to build based on what you are doing
preferred is
Code:
. build/envsetup.sh && brunch sunfire
but
Code:
. build/envsetup.sh
breakfast sunfire
mka bacon
works too.
basically run . build/envsetup.sh first
then you pick what to build with lunch,brunch, or breakfast
then you make,mka, or make bacon.
dont forget to make clean or make clobber between builds.
ill edit later on down the road.

---

Making kernels
pre-setup
Okay first of all you need to complete the above tutorial up to the getting source. so you wont have to do the building portion.
*Can you build kernels without android source, simple answer is yes, complicated answer is no. With the android source installed you have access to the proper tools. While personally i dont compile kernels with the older cross compilers of android, however this can be problematic and can lead to issues compiling. The dhd.ko is a great example. I have rebased hours of work to get dhd.ko to compile. To save everyone else my headache im going to show everyone the official way to compile kernels, not the cutting edge unsupported stuff that i do. *
setup
in terminal
cd "to your cyanogenmod source folder" we will use cyanogenmod for the tutorial
Code:
mkdir kernel
mkdir kernel/tegra
mkdir kernel/tegra-temp
mkdir kernel/compiled
mkdir kernel/compiled/modules
mkdir vendor/authentec
mkdir vendor/authentec/safenet
mkdir vendor/bcm
mkdir vendor/bcm/wlan
mkdir vendor/bcm/wlan/osrc
now hit this website and download
vendor-bcm-wlan-osrc.tgz
vendor-authentec-safenet.tgz
kernel-tegra.tgz
if you notice the file name, that is where it must be extracted.
now that you have the source, lets go on
compile
Code:
export PLATFORM_DIR="path to your cyanogenmod/android source"
export KERNEL_BUILD_OUT=$PLATFORM_DIR/kernel/tegra-temp
export ARCH=arm
export CROSS_COMPILE=$PLATFORM_DIR/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/bin/arm-eabi-
export KERNEL_SRC=$PLATFORM_DIR/kernel/tegra
make -j1 -C $KERNEL_SRC O=$KERNEL_BUILD_OUT KBUILD_DEFCONFIG=tegra_sunfire_android_defconfig defconfig modules_prepare
make -j1 -C $KERNEL_SRC O=$KERNEL_BUILD_OUT DEPMOD=out/host/linux-x86/bin/depmod INSTALL_MOD_PATH=$KERNEL_BUILD_OUT modules
make -j1 -C $KERNEL_SRC O=$KERNEL_BUILD_OUT DEPMOD=out/host/linux-x86/bin/depmod INSTALL_MOD_PATH=$KERNEL_BUILD_OUT modules_install
make -j1 -C $KERNEL_SRC O=$KERNEL_BUILD_OUT zImage
make -j1 -C $KERNEL_SRC O=$KERNEL_BUILD_OUT DEPMOD=out/host/linux-x86/bin/depmod INSTALL_MOD_PATH=$KERNEL_BUILD_OUT M=$PLATFORM_DIR/vendor/authentec/safenet/vpndriver modules
export LINUXSRCDIR=$KERNEL_SRC
export LINUXBUILDDIR=$PLATFORM_DIR/kernel/tegra-temp
make -C $PLATFORM_DIR/vendor/bcm/wlan/osrc/open-src/src/dhd/linux
cp kernel/tegra-temp/arch/arm/boot/zImage kernel/compiled
cp vendor/authentec/safenet/vpndriver/vpnclient.ko kernel/compiled/modules
cp vendor/bcm/wlan/osrc/open-src/src/dhd/linux/dhd.ko kernel/compiled/modules
now this will give you your modules and the zimage. to make a boot.img use android-utility to extract an existing boot.img. then replace the zimage and build the boot.img.

---

third post

---

Thanks
Thank you joker just what i needed to start and play around and get to learning,testing is all fine but creating is the real key.Thank you very much and all fellow devs for all your time and help means alot to some of us.Have a good weekend!

---

Thanks joker
Sent from my MB855 using xda premium

---

thanks... already got a dual boot....just..need..a..bigger..hdd. uggg Thanks again for all you do on here.

---

second post on how to compile a kernel? ;P

---

You forgot to add that getting everything right with the vendor and device tree is also one of the hardest parts...

---

mrinehart93 said:
You forgot to add that getting everything right with the vendor and device tree is also one of the hardest parts...
Click to expand...
Click to collapse
amen to that
Sent from my MB855 using Tapatalk

---

Will do, eventually
shabbypenguin said:
second post on how to compile a kernel? ;P
Click to expand...
Click to collapse
Sent from my MB855 using XDA App

---

Thanks. That helps a lot. Was already working on a setup.
Sent from my MB855 using Tapatalk

---

No the hardest part is when you fix something and it breaks something else, so you fix it, then something unrelated breaks, finally you get it semi fixed and run a make clobber and it fails again. So you have to revert and start over.
mrinehart93 said:
You forgot to add that getting everything right with the vendor and device tree is also one of the hardest parts...
Click to expand...
Click to collapse
Sent from my MB855 using XDA App

---

jokersax11 said:
No the hardest part is when you fix something and it breaks something else...
Click to expand...
Click to collapse
Haha! Sounds like my truck!

---

I'm downloading 198-7 kernel now I'll make a guide to building soon.
Sent from my MB855 using XDA App

---

ok kernel guide in place.

---

May be an oddball question, maybe not.
I've read the thread, have 100+ TB of hdd space and am d/l-ing what I need to get setup for a dual boot system.
Would I be able to attempt to port features of other kernels into a cm9 or other kernel. (I do have a particular mod in mind is why I ask)
I'm a MoPho-er

---

possible, depending on the mod, source and your skill.
FernBch said:
May be an oddball question, maybe not.
I've read the thread, have 100+ TB of hdd space and am d/l-ing what I need to get setup for a dual boot system.
Would I be able to attempt to port features of other kernels into a cm9 or other kernel. (I do have a particular mod in mind is why I ask)
I'm a MoPho-er
Click to expand...
Click to collapse
Sent from my MB855 using XDA App

---

jokersax11 said:
possible, depending on the mod, source and your skill.
Sent from my MB855 using XDA App
Click to expand...
Click to collapse
Mod is slide2wake, looking for source (unless I'm being dense the links I find are not source downloads), and for skills, well lets say, I usually catch on quick and can figure most things out easily. A few years back I dabbled with the command line stuff. It wasn't hard, didn't do too bad, but it's been a while.
Most times I can find the answers to my questions and can figure things out just fine, so I won't post up asking unless I'm totally stumped.
I'm a MoPho-er

---

i forgot all about that mod... did he ever post source for it?

---

Some great info I need to look into this more later love messing around with stuff like this
Sent from my MB855 using xda premium