Note: This is a public test instance of Red Hat Bugzilla. The data contained within is a snapshot of the live data so any changes you make will not be reflected in the production Bugzilla. Email is disabled so feel free to test any aspect of the site that you want. File any problems you find or give feedback at bugzilla.redhat.com.
Bug 1205236 - kernel FTBFS on ppc64le
Summary: kernel FTBFS on ppc64le
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: gcc
Version: 22
Hardware: ppc64le
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Jakub Jelinek
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: F-ExcludeArch-ppc64le, PPC64LETracker F22PPCBeta F22PPCFinal 1237363
TreeView+ depends on / blocked
 
Reported: 2015-03-24 13:45 UTC by Jakub Čajka
Modified: 2015-06-30 23:44 UTC (History)
13 users (show)

Fixed In Version: gcc-5.0.1-0.1.fc22
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 1237363 (view as bug list)
Environment:
Last Closed: 2015-04-21 18:40:13 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
IBM Linux Technology Center 122924 0 None None None Never

Description Jakub Čajka 2015-03-24 13:45:09 UTC 
Kernel build fails on ppc64le with:
.
.
.
BUILDING A KERNEL FOR ppc64le...
+ cd linux-4.0.0-0.rc4.git0.1.fc22.ppc64le
+ BuildKernel vmlinux vmlinux
+ MakeTarget=vmlinux
+ KernelImage=vmlinux
+ Flavour=
+ Flav=
+ InstallName=vmlinuz
+ Config=kernel-4.0.0-ppc64le.config
+ DevelDir=/usr/src/kernels/4.0.0-0.rc4.git0.1.fc22.ppc64le
+ '[' vmlinux = vmlinux ']'
+ CopyKernel=cp_vmlinux
+ KernelVer=4.0.0-0.rc4.git0.1.fc22.ppc64le
+ echo BUILDING A KERNEL FOR ppc64le...
+ perl -p -i -e 's/^EXTRAVERSION.*/EXTRAVERSION = -0.rc4.git0.1.fc22.ppc64le/' Makefile
+ make -s mrproper
+ cp configs/kernel-4.0.0-ppc64le.config .config
+ chmod +x scripts/sign-file
++ head -1 .config
++ cut -b 3-
+ Arch=powerpc
+ echo USING ARCH=powerpc
USING ARCH=powerpc
+ make -s ARCH=powerpc oldnoconfig
+ make -s ARCH=powerpc V=1 -j16 vmlinux
arch/powerpc/kernel/vdso32/gettimeofday.S: Assembler messages:
arch/powerpc/kernel/vdso32/gettimeofday.S:42: Error: syntax error; found `@', expected `,'
arch/powerpc/kernel/vdso32/gettimeofday.S:42: Error: junk at end of line: `@local'
arch/powerpc/kernel/vdso32/gettimeofday.S:48: Error: syntax error; found `@', expected `,'
arch/powerpc/kernel/vdso32/gettimeofday.S:48: Error: junk at end of line: `@local'
arch/powerpc/kernel/vdso32/gettimeofday.S:83: Error: syntax error; found `@', expected `,'
arch/powerpc/kernel/vdso32/gettimeofday.S:83: Error: junk at end of line: `@local'
arch/powerpc/kernel/vdso32/gettimeofday.S:87: Error: syntax error; found `@', expected `,'
arch/powerpc/kernel/vdso32/gettimeofday.S:87: Error: junk at end of line: `@local'
arch/powerpc/kernel/vdso32/gettimeofday.S:195: Error: syntax error; found `@', expected `,'
arch/powerpc/kernel/vdso32/gettimeofday.S:195: Error: junk at end of line: `@local'
arch/powerpc/kernel/vdso32/Makefile:42: recipe for target 'arch/powerpc/kernel/vdso32/gettimeofday.o' failed
make[2]: *** [arch/powerpc/kernel/vdso32/gettimeofday.o] Error 1
scripts/Makefile.build:403: recipe for target 'arch/powerpc/kernel/vdso32' failed
make[1]: *** [arch/powerpc/kernel/vdso32] Error 2
Makefile:951: recipe for target 'arch/powerpc/kernel' failed
make: *** [arch/powerpc/kernel] Error 2
make: *** Waiting for unfinished jobs....
.
.
.
Failed build: http://ppc.koji.fedoraproject.org/koji/taskinfo?taskID=2442927

This started to happened with gcc-5.0.0-0.19.fc22 and newer on ppc64le, BE seems unaffected. As last successfully built kernel (kernel-4.0.0-0.rc3.git0.1.fc22) fails same way with newer gcc, this makes me believe this is more probably issue in gcc, than in kernel.
Comment 1 Dan Horák 2015-03-24 13:50:36 UTC 
both the failed and successful builds used binutils-2.25-5.fc22.ppc64le
Comment 2 Marek Polacek 2015-03-24 13:52:33 UTC 
Is that reproducible?  Can you try compiling just the arch/powerpc/kernel/vdso32/gettimeofday.S file?
Comment 3 Jakub Jelinek 2015-03-24 13:56:12 UTC 
The problem is that powerpc64le is not a multilib target, we don't really support -m32 on ppc64le.
So, it is a kernel bug (or kernel configuration bug) to attempt to compile 32-bit ppc64le code with it.
Only ppc64 big endian supports multilib (though in Fedora in a very limited way, as no 32-bit packages are built these days).
Comment 4 Menanteau Guy 2015-03-24 17:16:27 UTC 
Also you can have a look to https://bugs.launchpad.net/ubuntu/trusty/+source/linux/+bug/1433809 to find a bypass
Comment 5 Dan Horák 2015-03-26 17:18:03 UTC 
So not only kernel is affected by the gcc change, but also grub2 (http://ppc.koji.fedoraproject.org/koji/taskinfo?taskID=2449339). And we will need some solution ...
Comment 6 Dan Horák 2015-04-08 11:45:44 UTC 
Jakub, seems that without the 32-bit support on LE we are stuck :-( Can you add it back in the next gcc build? We have no mean to workaround the problems for F-22, not sure about F-23.
Comment 7 Dan Horák 2015-04-08 12:43:05 UTC 
As fixing the kernel will take time and the grub2 situation is completely unclear, I propose to add the necessary options from
https://bugs.launchpad.net/ubuntu/trusty/+source/linux/+bug/1433809/comments/2
to our gcc5
Comment 8 Jeff Law 2015-04-08 16:55:05 UTC 
Could we enable just the 32 bit code generator without the multilibs?  Would that address the problem?
Comment 9 Peter Robinson 2015-04-08 16:59:25 UTC 
(In reply to Jeff Law from comment #8)
> Could we enable just the 32 bit code generator without the multilibs?  Would
> that address the problem?

Yes, I believe so, we don't need multilib.
Comment 10 Dan Horák 2015-04-08 17:51:49 UTC 
the options recommended by Alan Modra are
--enable-targets=powerpcle-linux --disable-multilib
Comment 11 Dan Horák 2015-04-14 06:47:39 UTC 
kernel now builds again (http://ppc.koji.fedoraproject.org/koji/buildinfo?buildID=302160)
Comment 12 Fedora Update System 2015-04-14 06:58:47 UTC 
gcc-5.0.1-0.1.fc22 has been submitted as an update for Fedora 22.
https://admin.fedoraproject.org/updates/gcc-5.0.1-0.1.fc22
Comment 13 Fedora Update System 2015-04-21 18:40:13 UTC 
gcc-5.0.1-0.1.fc22, libtool-2.4.2-33.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.
Note You need to log in before you can comment on or make changes to this bug.