Bug#981492: linux-source-5.10: Module-only builds failing since 39a8b293

From	小太 <nospam@kota.moe>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#981492: linux-source-5.10: Module-only builds failing since 39a8b293
Date	2021-01-31 21:50 +0100
Message-ID	<BDrPs-6bK-11@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Package: linux-source-5.10
Version: 5.10.9-1
Severity: normal
Tags: ftbfs
X-Debbugs-Cc: nospam@kota.moe

Trying to build in-tree kernel modules without the rest of the kernel (with the
M=... make target) results in the build failing with "ld: cannot open linker
script file -o: No such file or directory"

Commands to reproduce (taken from a DKMS Makefile):
        tar xaf $(LINUX_SOURCE_TAR) --strip-components=1 -C linux-source
        cp /boot/config-$(KERNELRELEASE) linux-source/.config
        cp /usr/src/linux-headers-$(KERNELRELEASE)/Module.symvers linux-
source/Module.symvers
        $(MAKE) -C linux-source oldconfig
        $(MAKE) -C linux-source prepare
        $(MAKE) -C linux-source M=drivers/hwmon

This seems to be direct cause of a recent Debian patch:
https://salsa.debian.org/kernel-
team/linux/-/blob/master/debian/patches/debian/kbuild-look-for-module.lds-
under-arch-directory-too.patch (commit
39a8b293ff1881bca11dae1831885dd30581d023)

The patch tries to make the linker only use a specific linker script
(module.lds) if it exists, but ends up preventing the linker script from being
built from source (module.lds.S), and thus ends up never existing.



-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.10.0-1-amd64 (SMP w/8 CPU threads)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages linux-source-5.10 depends on:
ii  binutils  2.35.1-7
ii  xz-utils  5.2.5-1.0

Versions of packages linux-source-5.10 recommends:
ii  bc                    1.07.1-2+b2
ii  bison                 2:3.7.4+dfsg-1
ii  flex                  2.6.4-8
ii  gcc                   4:10.2.1-1
ii  libc6-dev [libc-dev]  2.31-9
ii  linux-config-5.10     5.10.9-1
ii  make                  4.3-4

Versions of packages linux-source-5.10 suggests:
ii  libncurses-dev [ncurses-dev]  6.2+20201114-2
ii  pkg-config                    0.29.2-1
pn  qtbase5-dev                   <none>

-- no debconf information

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Thread

Bug#981492: linux-source-5.10: Module-only builds failing since 39a8b293 小太 <nospam@kota.moe> - 2021-01-31 21:50 +0100
  Processed: Re: linux-source-5.10: Module-only builds failing  since 39a8b293 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-02-15 03:00 +0100
  Bug#981492: linux-source-5.10: Module-only builds failing since 39a8b293 Ben Hutchings <ben@decadent.org.uk> - 2021-02-15 03:00 +0100
    Bug#981492: linux-source-5.10: Module-only builds failing since 39a8b293 ‍小太 <nospam@kota.moe> - 2021-02-15 12:50 +0100
  Bug#981492: linux-source-5.10: Module-only builds failing since 39a8b293 Robert Schlabbach <Robert.Schlabbach@gmx.net> - 2021-02-15 21:50 +0100
  Bug#981492: marked as done (linux-source-5.10: Module-only builds  failing since 39a8b293) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-02-16 02:10 +0100

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