938659 – dev-build/ninja-1.12.1: Fails to build with mold linker

Bug 938659 - dev-build/ninja-1.12.1: Fails to build with mold linker

Summary: dev-build/ninja-1.12.1: Fails to build with mold linker

Status:	RESOLVED NEEDINFO

Alias:	None

Product:	Gentoo Linux
Classification:	Unclassified
Component:	Current packages (show other bugs)
Hardware:	All Linux

Importance:	Normal normal
Assignee:	Gentoo's Team for Core System packages

URL:
Whiteboard:
Keywords:

Depends on:
Blocks:	systemwide-mold gcc-15
	Show dependency tree

Reported:	2024-08-29 03:49 UTC by Blacktea Hamburger
Modified:	2024-10-28 11:40 UTC (History)
CC List:	2 users (show)

See Also:	https://github.com/rui314/mold/issues/1336 941070
Package list:
Runtime testing required:	---

Attachments
build.log (build.log,33.37 KB, text/x-log) 2024-08-29 03:49 UTC, Blacktea Hamburger	Details
Output of emerge --info dev-build/ninja (emerge-info-output.log,19.50 KB, text/x-log) 2024-08-29 03:50 UTC, Blacktea Hamburger	Details
gdb coredump (gdb.txt,21.98 KB, text/plain) 2024-08-30 11:51 UTC, Blacktea Hamburger	Details
build.log (build.log,32.20 KB, text/x-log) 2024-08-30 11:53 UTC, Blacktea Hamburger	Details
build.log (build.log,31.12 KB, text/x-log) 2024-08-31 11:06 UTC, Blacktea Hamburger	Details
gdb coredump (gdb.txt,21.05 KB, text/plain) 2024-08-31 11:06 UTC, Blacktea Hamburger	Details
Show Obsolete (3) View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.

Description Blacktea Hamburger 2024-08-29 03:49:38 UTC

Created attachment 901515 [details]
build.log

On gcc14 or without -fuse-ld=mold build succeeds.

Comment 1 Blacktea Hamburger 2024-08-29 03:50:15 UTC

Created attachment 901516 [details]
Output of emerge --info dev-build/ninja

Comment 2 Sam James archtester

2024-08-30 03:25:51 UTC

Can you run the failing command manually in the build directory under gdb to find where it traps?

Comment 3 Blacktea Hamburger 2024-08-30 11:51:53 UTC

Created attachment 901671 [details]
gdb coredump

Comment 4 Blacktea Hamburger 2024-08-30 11:53:24 UTC

Created attachment 901672 [details]
build.log

Comment 5 Blacktea Hamburger 2024-08-31 11:06:24 UTC

Created attachment 901768 [details]
build.log

Comment 6 Blacktea Hamburger 2024-08-31 11:06:44 UTC

Created attachment 901769 [details]
gdb coredump

Comment 7 Blacktea Hamburger 2024-08-31 11:09:56 UTC

I recompiled it using gcc-14 but it still failed. It never failed before. My gcc-14 and mold are built on gcc-15.

Comment 8 Sam James archtester

2024-09-01 09:33:00 UTC

I think you need to figure out which part of your system is miscompiled.

I'm using GCC 15 (and mold + lto) on various systems and had no issues.

Please also keep in mind that given the flags you mentioned in another bug, it's not always enough to just rebuild _one_ thing with safe flags. It might be that a dependency is contaminated.

Comment 9 Blacktea Hamburger 2024-09-14 10:28:16 UTC

It seems that gcc 15 has broken too many things. I don't want to move further because I have reinstalled my system.

Comment 10 Sam James archtester

2024-09-17 21:45:40 UTC

I really think it's more about the flags, but it is what it is now.

Comment 11 Larry the Git Cow gentoo-dev

2024-10-28 11:38:44 UTC

The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f6da81d9f85e2223a469e043dc95fd6fc555409f

commit f6da81d9f85e2223a469e043dc95fd6fc555409f
Author:     Sam James <sam@gentoo.org>
AuthorDate: 2024-10-28 11:36:23 +0000
Commit:     Sam James <sam@gentoo.org>
CommitDate: 2024-10-28 11:38:18 +0000

    sys-devel/mold: workaround linux-6.11 incompatibility
    
    Don't write to existing files, instead replace them. This fixes (or works
    around) an incompatibility with linux-6.11.
    
    Bug: https://github.com/rui314/mold/issues/1361
    Bug: https://bugs.gentoo.org/938659
    Closes: https://bugs.gentoo.org/941070
    Thanks-to: Jinghao Jia <jinghao7@illinois.edu>
    Thanks-to: ernsteiswuerfel <erhard_f@mailbox.org>
    Signed-off-by: Sam James <sam@gentoo.org>

 sys-devel/mold/files/mold-2.34.1-linux-6.11.patch |  22 +++++
 sys-devel/mold/mold-2.34.1-r1.ebuild              | 107 ++++++++++++++++++++++
 sys-devel/mold/mold-9999.ebuild                   |   4 +
 3 files changed, 133 insertions(+)

Comment 12 Sam James archtester

2024-10-28 11:40:28 UTC

I think your issue was really bug 941070 and it should be fixed/worked around now.