Bug 694612

Summary:	sys-kernel/gentoo-sources-5.3.0 - arch/x86/entry/vdso/vdso64.so.dbg: undefined symbols found
Product:	Gentoo Linux	Reporter:	Ondrej Hojdysz <ondrej.hojdysz>
Component:	Current packages	Assignee:	Gentoo Kernel Bug Wranglers and Kernel Maintainers <kernel>
Status:	RESOLVED CANTFIX
Severity:	normal	CC:	gentoo, jj, kuba.iluvatar, meheschmid
Priority:	Normal
Version:	unspecified
Hardware:	AMD64
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	kernel config make output

Description Ondrej Hojdysz 2019-09-17 11:02:00 UTC

Reproducible: Always

Steps to reproduce:
emerge gentoo-sources-5.3.0

make distclean
make defconfig
make

relevant part of build output:
  CC      arch/x86/entry/vdso/vclock_gettime.o
  CC      arch/x86/entry/vdso/vgetcpu.o
  VDSO    arch/x86/entry/vdso/vdso64.so.dbg
arch/x86/entry/vdso/vdso64.so.dbg: undefined symbols found
make[3]: *** [arch/x86/entry/vdso/Makefile:59: arch/x86/entry/vdso/vdso64.so.dbg] Error 1
make[3]: *** Deleting file 'arch/x86/entry/vdso/vdso64.so.dbg'
make[2]: *** [scripts/Makefile.build:497: arch/x86/entry/vdso] Error 2
make[1]: *** [scripts/Makefile.build:497: arch/x86/entry] Error 2
make: *** [Makefile:1083: arch/x86] Error 2

Comment 1 Jeroen Roovers (RETIRED) gentoo-dev

2019-09-17 12:37:32 UTC

Please attach the entire make output and the .config file to this bug report.

Comment 2 Ondrej Hojdysz 2019-09-17 14:19:54 UTC

Created attachment 590078 [details]
kernel config

Comment 3 Ondrej Hojdysz 2019-09-17 14:20:16 UTC

Created attachment 590080 [details]
make output

Comment 4 Sven B. 2019-09-17 16:22:40 UTC

Same here. using ld.bfd instead of ld.gold works.

Comment 5 Ondrej Hojdysz 2019-09-18 06:01:02 UTC

Same here switching from gold to bfd fixes the problem

Comment 6 Michael Schmid 2019-10-01 09:07:18 UTC

This also seems to happen on the main stable/linux.git linux-5.3.y branch, and has done so for a few minor release versions.

Switching to the bfd linker also works around the issue there.

Comment 7 Mike Pagano gentoo-dev

2019-10-18 17:35:13 UTC

The gold linker is not supported upstream to the point of now having a commit that will fail when attempted.

"kbuild: Fail if gold linker is detected"

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=75959d44f9dc8e44410667009724e4e238515502