[Buildroot] grub problems since upgrading build host to CentOS 6.3

[Arnout Vandecappelle <arnout@mind.be>]

On 12/11/12 23:45, Joe Lorenz wrote:
> We updated our build host to CentOS 6.3 which apparently has a newer host gcc.
>
> Our crosstools are set for x86_64 target, and we know about grub not being supported for 64-bit compiler (Bug 5024).
> This newer gcc and/or binutils might be to blame.
>
> The problem shows when we try to install it - we see this:
>
> grub> device (hd0) /dev/sdb
> grub> root (hd0,1)
> Filesystem type is ext2fs, partition type 0x83
> grub> setup (hd0)
> Checking if "/boot/grub/stage1" exists... no
> Checking if "/grub/stage1" exists... no
>
> Error 15: File not found
> grub>
>
> But 'stage1' and all the others are indeed present on the root partition at /boot/grub/.

  Let me try to understand what you're doing.

- You have a buildroot config that includes grub.
- You build on a pre-6.3 machine, boot the resulting image, run grub.
- grub finds /boot/grub/stage1 on /dev/sdb

- You build on a 6.3 machine, boot the resulting image, run grub.
- grub doesn't find /boot/grub/stage1 on /dev/sdb

  Is that correct?  Sounds weird...  Can grub find any files on
(hd0,1)?

>
> It's important to us to be able to build grub as needed in case we have to modify any networking hardware support, so
> falling back to using older binaries is not optimal. We're wondering if anyone else has gotten around this in a CentOS
> 6.3 build environment.

  You could add grub2 to your local buildroot - see
http://patchwork.ozlabs.org/patch/191813/

  Needs work, of course, but worked for me.  grub2 is much better at cross-
compiling than grub.


  Regards,
  Arnout

-- 
Arnout Vandecappelle                               arnout at mind be
Senior Embedded Software Architect                 +32-16-286540
Essensium/Mind                                     http://www.mind.be
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