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

[Martin Peevski <martin@ronetix.at>]

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!