[Buildroot] First rootfile system build using buildroot

[Dinesh Guleria]

Thanks Thomas for your reply. I will use Sourcery CodeBench 2014.05 for
time being.

Build is taking some time. Will Get back to you.

Thanks & Regards,
Katoch



On Tue, Sep 1, 2015 at 12:28 PM, Thomas Petazzoni <
thomas.petazzoni at free-electrons.com> wrote:

> Dear Dinesh Guleria,
>
> On Tue, 1 Sep 2015 06:39:34 +0530, Dinesh Guleria wrote:
>
> > One more question from my side if i use " Sourcery
> > CodeBench 2014.05"  toolchain then buildroot will download it for me or i
> > have to download it manually ?
>
> Buildroot will download it for you.
>
> > Also if buildroot will download it then in
> > this case will it be a one time process or if i make a new build for my
> > rootfile system, then every time tool chain will be downloaded ?
>
> It is a one time process. Buildroot keeps a cache of the downloaded
> files into the dl/ sub-directory (which can be customized using the
> BR2_DL_DIR configuration option, which is also an environment variable).
>
> > What exactly the diffrence between using external tool chain like
> Sourcery
> > CodeBench 2014.05"  & building toolchain using crosstool-ng ?
> >
> http://www.bootc.net/archives/2012/05/26/how-to-build-a-cross-compiler-for-your-raspberry-pi/
>
> Sourcery CodeBench 2014.05 is a pre-built toolchain, used by a lot of
> people. It's already there and available, hopefully quite well tested.
> However, since it's pre-built, you cannot customize it.
>
> Using crosstool-ng to build your toolchain allows to generate a
> completely custom toolchain, tailored for your platform.
>
> > >> Building the rootfilesystem into zImage resolves the rootfilesystem
> > loading/linking issue clearly.
> >
> > Will uboot be able to understand that my rootfilesystem is inside my
> zimage
> > ? Or i have to tell uboot explicitly ?
>
> If you're using an initramfs bundled inside the zImage, then U-Boot
> does not even need to know about it. Just load the zImage in U-Boot,
> start the kernel, and that's it.
>
> Best regards,
>
> Thomas
> --
> Thomas Petazzoni, CTO, Free Electrons
> Embedded Linux, Kernel and Android engineering
> http://free-electrons.com
>
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