[Bug 1178847] Re: chromeos 3.8 kernel fails to boot when compiled with gcc-4.8

[Christian Prochaska]

It seems the same problem also applies to the 3.4.0-5 kernel in the
Ubuntu repository. The kernel image in the 13.04 release
(https://launchpad.net/ubuntu/+source/linux-
chromebook/3.4.0-5/+build/4314955) works for me, but the one in the
13.10 and 14.04 releases (https://launchpad.net/ubuntu/+source/linux-
chromebook/3.4.0-5.1/+build/4575433) does not. According to the build
log, the newer image was built with gcc 4.8.

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https://bugs.launchpad.net/bugs/1178847

Title:
  chromeos 3.8 kernel fails to boot when compiled with gcc-4.8

Status in “gcc-4.8” package in Ubuntu:
  Confirmed

Bug description:
  I wanted to check newer kernel for Samsung ARM Chromebook. So I
  grabbed http://git.chromium.org/chromiumos/third_party/kernel-
  next.git, updated config and started building.

  Everything built fine (with lot of warnings) but kernel failed to
  boot. So I tried to build it under 'raring' and it booted fine...

  OK, so maybe it is gcc fault I though. And did build with gcc-4.7
  instead. This time kernel built and booted fine:

  hrw at krolik:~$ uname -a;cat /proc/device-tree/model ;echo
  Linux krolik 3.8.0-saucy4.7 #9 SMP Fri May 10 22:48:02 CEST 2013 armv7l armv7l armv7l GNU/Linux
  Google Snow

  So I think that this is gcc-4.8 fault.

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