Public bug reported:
Binary package hint: gcc-4.4
when attempting to compile recent vanilla kernels from source (2.6.35.7,
2.6.35.8, 2.6.36), the resulting bzImages all hang at the same point in
the boot process. this doesn't seem to be an error with the kernel
config or source, because using identical kernel source and .config
produces working kernels when compiled inside a debootstrap'd lucid
chroot.
i had originally suspected this had something to do with a specific cpu
setting (CONFIG_MPENTIUMM), but this also happens after changing to the
'generic' CONFIG_M686. i also suspected that perhaps something was
broken with my install. however, a bzImage produced remotely from
someone's fresh 32bit 10.10 install also hung at the exact same place
during boot. compiling using ubuntu's generic .config and patchset
(linux-image-2.6.35-22-generic) produced a working kernel.
the boot failure occurs both on real hardware (ibm t42p) as well as
inside of qemu. the broken bzImages hang at rtc_cmos in qemu, and at
ehci initialization on real hw. the working bzImages from lucid (as they
ought to) end with a kernel panic due to missing rootfs.
the broken bzImages are produced with both kernel-package 12.036 and a
simple 'make' in the kernel source tree.
i had some luck using bzImage/vmlinux with qemu/gdb to see where it was
stuck at, but now the symbols don't seem to match up. i would otherwise
provide this info.
this problem has only appeared since installing 10.10. 8.10, 9.04, 9.10,
and 10.04 did not present this issue. lucid's build environment, used
from a chroot inside maverick, also does not present this issue.
although this bug has been placed under gcc-4.4, maverick's gcc-4.5
package has the same issue.
running gcc 4.4.4's testsuite shows failure in several places. the
binutils testsuite shows no failures.
i've attached a minimized 2.6.36 .config which produces a broken
bzImage.
any insight appreciated.
thanks,
-matt
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: gcc-4.4 4.4.4-14ubuntu5
Uname: Linux 2.6.36deep-thought i686
Architecture: i386
Date: Tue Nov 9 15:28:56 2010
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
SourcePackage: gcc-4.4
** Affects: gcc-4.4 (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 kernel maverick toolchain
--
maverick toolchain producing unbootable (hanging) kernels
https://bugs.launchpad.net/bugs/673236
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