How do you generate the config file?

[Guru Das S]

On 29 January 2017 at 15:32, 慕冬亮 <mudongliangabcd at gmail.com> wrote:
> Hello,
>     If you want to reuse the config of current kernel, you can use
> `make oldconfig` to generate config file.
>
> --
> My best regards to you.
>
>      No System Is Safe!
>      Dongliang Mu
>
> 2017-01-29 18:24 GMT-05:00 Ozgur Karatas <mueddib at goosey.org>:
>>
>> Hello,
>>
>> you can get .config files in two ways, firstly get the existing .config file
>> and compile to kernel.
>>
>> $ cp /boot/config-x.x.x /bla/linux/.config
>>
>> Second, use the generate command:
>>
>> $ make defconfig
>>
>> Regards,
>>
>> ~Ozgur
>>
>> 30.01.2017, 01:18, "Abel" <akronix5 at gmail.com>:
>>
>> Hi!
>>
>> Where do you get the config file from? or do you generate it yourself?
>>
>> I'm using xUbuntu 16.04 in a VM inside VMWare, following the instructions
>> described in kernelnewbies wiki. (By the way, the download links to the iso
>> images of Ubuntu don't work for me)
>>
>> If I copy the latest config file in /boot, kernel 4.4.0, it starts to ask me
>> many config parameters that I don't know what to answer. I tried to press
>> always <enter> to set up the default parameters, but after compiling I get
>> an error trying to boot from that kernel (see atachment).
>>
>> I tried with make menuconfig and that seems to work, but it takes too long
>> because it builds and includes many many drivers modules.
>> Yeah, I know I could navigate through the ncurses window and select the
>> stuff I want and deselect what I don't want, but I'd rather prefer just a
>> simple config file that builds and works and don't waste time in
>> understanding all the stuff that it's in there.
>>
>> So, isn't there a way to get a simple config file just to develop kernel
>> stuff for an Ubuntu image?
>> I've even gone to the kernel ppa sources for Ubuntu:
>> http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9.5/; but it only provides
>> a patch using the debian config files (which don't come from git sources of
>> course).
>>
>> I just want a config file, copy it to the kernel root code and compile.
>>
>> Greetings,
>>
>>                                                        Abel
>>
>>
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>>
>
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Hi Abel,

To add to what Ozgur said, you may first copy the existing .config
file that comes along with your Linux distribution to your kernel
tree, and then use:

$ make localmodconfig

instead of defconfig. A quick Google search should tell you the
differences between the two - and from what I've read, localmodconfig
is preferred to defconfig.

Hope this helps.


Guru Das Srinagesh.