[OpenWrt-Devel] kernel changes on recompilation?

[Gui Iribarren]

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On 01/10/14 14:31, Baptiste Jonglez wrote:
> When you activate/deactivate packages in menuconfig, it may modify 
> what gets compiled into the kernel, to add/remove support for the 
> various subsystems needed by the packages you build.  This will 
> cause the kernel to be rebuilt with a different package number.
> 
> If you just rebuild the image without changing anything in 
> menuconfig, I think the kernel package will not be rebuilt.  Not 
> sure though, just try and see for yourself :)

Hm.. i can contribute a datapoint: if you make a "dirclean", without
changing anything in the makeconfig or anything else
(say, "make dirclean ; make ; make dirclean; make")
you'll end up with two different kernel-hashes (after step 2 and 4)
so there's (in addition to selected-kernel-features and such) some
kind of build-date being taken into account for calculating the hash,
which gets lost when doing dirclean, somewhere inside build_dir i suppose.

cheers!

gui

> 
> Baptiste
> 
> On Wed, Oct 01, 2014 at 03:43:20PM +0530, Nishant Sharma wrote:
>> Hello members,
>> 
>> Although, I am compiling and using custom OpenWRT images since 8 
>> months now, but I am still confused with this particular 
>> behaviour. I am using it primarily on x86 Alix & APU devices.
>> 
>> Everytime I run a make and kernel gets recompiled, it changes
>> the hex value appended to the kernel package name which makes a
>> lot of packages or new modules compiled uninstallable on
>> existing systems through opkg.
>> 
>> What is the best practice for doing these kind of things or is 
>> there any workaround?
>> 
>> Thanks in advance.
>> 
>> Regards, Nishant _______________________________________________
>>  openwrt-devel mailing list openwrt-devel at lists.openwrt.org 
>> https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
>> 
>> 
>> _______________________________________________ openwrt-devel 
>> mailing list openwrt-devel at lists.openwrt.org 
>> https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
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