Hi Claude, the Debian kernel is compiled with GCC: https://buildd.debian.org/status/fetch.php?pkg=linux&arch=amd64&ver=6.1.27-1&stamp=1683630698&raw=0 and compiles just fine.To compile the kernel with llvm you either need to set CC or LLVM variables:
https://www.kernel.org/doc/html/latest/kbuild/llvm.htmlCan you send the output of `export` to check what is set in your environment?
Given that you don't use the default compiler and that the default toolchain is provided by the build-essential package, I don't think this is a dependency issue and I would close this bug.
Cheers Jochen * Claude Heiland-Allen <claude@mathr.co.uk> [2023-05-11 12:57]:
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>
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