Messages in this thread | | | Date | Wed, 9 Feb 2011 15:23:02 -0800 | From | Andy Isaacson <> | Subject | Re: CONFIG_KERNEL_XZ obscure build failure if xz(1) not installed |
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On Thu, Feb 10, 2011 at 12:01:42AM +0200, Lasse Collin wrote: > On 2011-02-09 Andy Isaacson wrote: > > % make -j4 > > ... > > CC arch/x86/boot/tty.o > > CC arch/x86/oprofile/oprofile.mod.o > > XZKERN arch/x86/boot/compressed/vmlinux.bin.xz > > exec: 23: xz: not found > > This may have something to do with the shell that "make" uses to run the > commands. The compression command isn't seen as failed with dash for > some reason. > > It doesn't matter what shell is used to run xz_wrap.sh. The same problem > exists with other compressors if they are missing. > > > commit 100b33c8bd8a3235fd0b7948338d6cbb3db3c63d > [...] > > % ls -l arch/x86/boot/bzImage > > -rw-r--r-- 1 adi adi 1991504 Feb 1 18:41 arch/x86/boot/bzImage > > "Feb 1" was about a week ago. The file is a few days older than the > commit ID, assuming that your clock is set correctly.
Ah, yes, this is my regular build tree; I routinely pull and build there.
So the build failed, but the output file remains because it failed on an intermediate step. (This testing was from me reproducing it on a different system, with 100b33).
Rewinding to the original system which failed to boot...
How did "make install" create a broken /boot/vmlinuz-2.6.38-rc3-0312-gcb5520f that caused the boot-time error message?
If I re-run "make -j4" in the tree that caused the problem, make fails with exit code 2.
The following seems to reproduce the silent error:
rm .config make defconfig make -j4 edit .config and set CONFIG_KERNEL_XZ=y, CONFIG_KERNEL_GZIP=n
% make -j4 ... Kernel: arch/x86/boot/bzImage is ready (#64) % echo $? 0
The resulting bzImage fails to boot with the aforementioned "Input is not in the XZ format" error.
FWIW, the machine that's showing the problem is an Ubuntu Karmic x86_64 desktop install with all updates through mid-January installed.
-andy
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