[Buildroot] Fwd: Re: Basic questions about using BuildRoot

[Martin Peevski <martin@ronetix.at>]

On 20/09/12 09:19, Martin Peevski wrote:
> On 19/09/12 01:06, Arnout Vandecappelle wrote:
>> On 09/17/12 12:43, Thomas De Schampheleire wrote:
>>> If you're only interested in the rootfs, you could use the original,
>>> working u-boot and use the rootfs from buildroot. Have you tried that?
>>>
>>>> >
>>>> >  One question beyond the theme: is it possible to build only Root FS
>>>> >  compatible with some external Kernel without any tool and if so 
>>>> how to do
>>>> >  that?
>>
>>  Indeed, it is entirely possible to use buildroot to build a rootfs and
>> combine it with a pre-built kernel.  There is usually no dependency
>> of an executable on a specific kernel version, because the kernel
>> ABI is backward-compatible. When you build an internal or
>> crosstool-NG toolchain in buildroot, however, do make sure that
>> you use kernel headers with a sufficiently low version (smaller than
>> or equal to the pre-built kernel you use).
>>
>>  If you do want to build a custom kernel later on, you need two
>> things: the source and the config. Whoever gave you the kernel
>> binary is also obliged to give you the source (GPL), so that should
>> be doable. The config you can usually get from the running kernel,
>> in /proc/config.gz.
>>
>>
>>  Good luck!
>>
>>  Regards,
>>  Arnout
>>
>
>
>      Hi again! Thank you for the help. All my attempts to build Linux 
> with external version of U-boot and Kernel and the rootfs from 
> buildroot was unsuccessfull. However I get older directory tree and 
> programs and make rootfs with the Linux command mkfs.jffs2. To that 
> moment it works, thank for you time and help!
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      Hi, I'm back to Buildroot. I new working Linux on board which 
isn't supported to that moment in Buildroot, I think - AT91SAM9G45 on 
Ronetix board. Is it possible to build for it? Moreover I will use 
external Kernel which support 9g45 - Kernel version 2.6.30. That version 
isn't supported from the Kernel headers, I think? Can you help me build 
the Linux again?


      Thanks, Martin.