[HOW TO] Compile and Deploy a Kernel

[FloRider]

Ahh i figured out how to do it now. Actually I just need to navigate into the file direction. so I typed in "cd /home/(your username)/Development/A2109N_GPL_kernel_570" for the direction, and then just type in those code that you provides


Oh also, how come when i type "make oldconfig", there are a lot of question showing up about the kernel? Is that supposed to happen?? Or it should be blank and then i can enter the next statement which is "make -j5"?

Yes. I don't understand why those haven't been specified in the old .config. The defaults should be fine. I don't really understand the relationship between the Kconfigs, the defconfig, and the final .config file. That's one problem I'm having now when I add new parameters to the code. You should be able to breeze through the questions -- just remember to follow my directions about the config file. Rename it to .config, place it in the source root, and then execute make oldconfig. "Oldconfig" uses that .config file, so that will have to be present. It's a system file, so it's normally hidden.

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[doomboss]

I think i just found a better way to do the kernel, but oh well i am still trying to figure it out. But here is the link: How to Edit Android Kernels in Ubuntu | eHow.com It is probably for Ubuntu.
Too excited to explain how i changed the path, but yeah just letting you know and maybe you can help me to verify that this way works.

[doomboss]

Ahh, i see what i did. So instead of use oldconfig, i use menuconfig. That way i can change the kernel setting more easy.

[FloRider]

I think i just found a better way to do the kernel, but oh well i am still trying to figure it out. But here is the link: How to Edit Android Kernels in Ubuntu | eHow.com It is probably for Ubuntu.
Too excited to explain how i changed the path, but yeah just letting you know and maybe you can help me to verify that this way works.

There's no way that guide will work for our kernel. It's written specifically for the HTC EVO, and mine is specifically for the A2109 (thus there are a few details missing).

Sent from my IdeaTabA2109A using Tapatalk HD

[FloRider]

Ahh, i see what i did. So instead of use oldconfig, i use menuconfig. That way i can change the kernel setting more easy.

You will need to start with oldconfig and the .config file. There are too many settings that are different between the stock config and the menuconfig defaults. I thought I mentioned this in the guide, but you can run menuconfig after oldconfig. I think you have to specifically tell it to load the .config file once you are inside the application. I could be wrong, but I think otherwise it ignores it and loads the defaults from the defconfig.

So, feel free to mess around with menuconfig, but I expect you'll have to use the config file from your A2109. Oh, now that I think about it, it's probably unnecessary to use oldconfig. Sorry - just load the config file into menuconfig. But don't use the menuconfig defaults.

Sent from my IdeaTabA2109A using Tapatalk HD

[vampirefo.]

I think i just found a better way to do the kernel, but oh well i am still trying to figure it out. But here is the link: How to Edit Android Kernels in Ubuntu | eHow.com It is probably for Ubuntu.
Too excited to explain how i changed the path, but yeah just letting you know and maybe you can help me to verify that this way works.

That is close to the way I compile my kernels.

[doomboss]

You will need to start with oldconfig and the .config file. There are too many settings that are different between the stock config and the menuconfig defaults. I thought I mentioned this in the guide, but you can run menuconfig after oldconfig. I think you have to specifically tell it to load the .config file once you are inside the application. I could be wrong, but I think otherwise it ignores it and loads the defaults from the defconfig.

So, feel free to mess around with menuconfig, but I expect you'll have to use the config file from your A2109. Oh, now that I think about it, it's probably unnecessary to use oldconfig. Sorry - just load the config file into menuconfig. But don't use the menuconfig defaults.

Sent from my IdeaTabA2109A using Tapatalk HD

Ok I loaded the config from our tablet first before messing with any setting. Right now i am just trying to see how the setting looks like, and i am not good enough to edit any code yet.

[doomboss]

That is close to the way I compile my kernels.

Ok thanks for letting me know

[vampirefo.]

Just build stock kernel a few times and install it, so you understand the process, before you modify the code.

[vampirefo.]

Once you guys get good at kernel building, you might want to try your hand at toolchain building, this is very hard, consider building a kernel a warm up.

to get info about your kernel, including the toolchain used to build the kernel.

adb shell

cat /proc/version

My current kernel displays.

root@android:/ # cat /proc/version
Linux version 3.1.10 (vampirefo@vampirefo-GA-MA78GM-US2H) (gcc version 4.7.3 20130102 (prerelease) (crosstool-NG hg+default-20f2459b97bf) ) #1 SMP PREEMPT Sun Feb 3 13:00:51 EST 2013