Bug#1035933: linux-image-6.1.0-8-amd64-unsigned: fails to build (llvm-strip not found, missing dependency?)

[Claude Heiland-Allen <claude@mathr.co.uk>]

Package: linux-image-6.1.0-8-amd64-unsigned
Severity: serious
Tags: ftbfs
Justification: fails to build from source (but built successfully in the past)
X-Debbugs-Cc: claude@mathr.co.uk

Dear Maintainer,

   * What led up to the situation?

I wanted to patch the kernel source to see if it would help an issue I was having,
so I followed my usual steps when changing a Debian package locally:

sudo apt build-dep linux-image-6.1.0-8-amd64-unsigned
mkdir linux
cd linux
apt source linux-image-6.1.0-8-amd64-unsigned
cd linux-6.1.25
# make changes to the source code
# specfically some warning prints in devices/usb/host/xhci-ring.c
debuild -i -us -uc -b

   * What was the outcome of this action?

The build failed after some time with:

...
llvm-strip -g /home/claude/linux/linux-6.1.25/debian/build/build-tools/tools/bpf/bpftool/profiler.bpf.o
make[4]: llvm-strip: No such file or directory
make[4]: *** [Makefile:187: /home/claude/linux/linux-6.1.25/debian/build/build-tools/tools/bpf/bpftool/profiler.bpf.o] Error 127
make[4]: *** Waiting for unfinished jobs....
llvm-strip -g /home/claude/linux/linux-6.1.25/debian/build/build-tools/tools/bpf/bpftool/pid_iter.bpf.o
make[4]: llvm-strip: No such file or directory
make[4]: *** [Makefile:187: /home/claude/linux/linux-6.1.25/debian/build/build-tools/tools/bpf/bpftool/pid_iter.bpf.o] Error 127
make[4]: Leaving directory '/home/claude/linux/linux-6.1.25/tools/bpf/bpftool'
make[3]: *** [/home/claude/linux/linux-6.1.25/debian/rules.d/tools/bpf/bpftool/Makefile:15: all] Error 2
make[3]: Leaving directory '/home/claude/linux/linux-6.1.25/debian/build/build-tools/tools/bpf/bpftool'
make[2]: *** [debian/rules.real:538: build_bpftool] Error 2
make[2]: Leaving directory '/home/claude/linux/linux-6.1.25'
make[1]: *** [debian/rules.gen:1494: build-arch_amd64_real_bpftool] Error 2
make[1]: Leaving directory '/home/claude/linux/linux-6.1.25'
make: *** [debian/rules:39: build-arch] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
debuild: fatal error at line 1182:
dpkg-buildpackage -us -uc -ui -i -b failed

   * What outcome did you expect instead?

I expected apt to have fetched all the build-time dependencies of the package,
and the build to have succeeded.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

After

sudo apt install llvm

then

debuild -i -us -uc -b

worked as expected.


Thanks for your work on this package,


Claude


-- System Information:
Debian Release: 12.0
  APT prefers testing-security
  APT policy: (990, 'testing-security'), (990, 'testing'), (500, 'testing-debug')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.1.0-8-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages linux-image-6.1.0-8-amd64-unsigned depends on:
ii  initramfs-tools [linux-initramfs-tool]  0.142
ii  kmod                                    30+20221128-1
ii  linux-base                              4.9

Versions of packages linux-image-6.1.0-8-amd64-unsigned recommends:
ii  apparmor             3.0.8-3
ii  firmware-linux-free  20200122-1

Versions of packages linux-image-6.1.0-8-amd64-unsigned suggests:
pn  debian-kernel-handbook  <none>
ii  extlinux                3:6.04~git20190206.bf6db5b4+dfsg1-3+b1
ii  grub-efi-amd64          2.06-12
pn  linux-doc-6.1           <none>