Thanks for the information. I don't see why it should use llvm, on the other hand the kernel Makefile is rather clear when to use it. Can you check if you an still reproduce the problem?

* Claude Heiland-Allen <cla...@mathr.co.uk> [2023-05-25 11:47]:
Hi Jochen,

I didn't set any non-standard compiler options as far as I recall.
I certainly was not intending to build with LLVM.
Unfortunately I have not kept the log of the failing build,
but I remember seeing that gcc was used for the majority of the compilation.

Regards,


Claude

PS: export output as requested:

$ export
declare -x ANDROID_HOME="/home/claude/opt/android"
declare -x ANDROID_NDK_HOME="/home/claude/opt/android/ndk/21.4.7075529"
declare -x CLUTTER_IM_MODULE="ibus"
declare -x COLORTERM="truecolor"
declare -x DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/1000/bus"
declare -x DESKTOP_SESSION="xfce"
declare -x DISPLAY=":0.0"
declare -x GDMSESSION="xfce"
declare -x 
GNOME_TERMINAL_SCREEN="/org/gnome/Terminal/screen/0b1a867e_925f_4768_96f3_643cc3c21d91"
declare -x GNOME_TERMINAL_SERVICE=":1.84"
declare -x GTK_IM_MODULE="ibus"
declare -x GTK_MODULES="gail:atk-bridge"
declare -x HOME="/home/claude"
declare -x LANG="en_GB.UTF-8"
declare -x LANGUAGE="en_GB:en"
declare -x LD_LIBRARY_PATH="/home/claude/opt/lib"
declare -x LOGNAME="claude"
declare -x 
LS_COLORS="rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=00:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.zst=01;31:*.tzst=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.wim=01;31:*.swm=01;31:*.dwm=01;31:*.esd=01;31:*.avif=01;35:*.jpg=01;35:*.jpeg=01;35:*.mjpg=01;35:*.mjpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35
:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.webp=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36:*.opus=00;36:*.spx=00;36:*.xspf=00;36:*~=00;90:*#=00;90:*.bak=00;90:*.old=00;90:*.orig=00;90:*.part=00;90:*.rej=00;90:*.swp=00;90:*.tmp=00;90:*.dpkg-dist=00;90:*.dpkg-old=00;90:*.ucf-dist=00;90:*.ucf-new=00;90:*.ucf-old=00;90:*.rpmnew=00;90:*.rpmorig=00;90:*.rpmsave=00;90:"
declare -x OLDPWD
declare -x PANEL_GDK_CORE_DEVICE_EVENTS="0"
declare -x 
PATH="/home/claude/opt/vbcc/vbcc/bin:/opt/amiga/bin:/home/claude/opt/android/ndk/21.4.7075529:/home/claude/opt/android/platform-tools:/home/claude/opt/android/tools:/home/claude/opt/bin:/home/claude/.local/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/home/claude/opt/bin"
declare -x PWD="/home/claude"
declare -x QT_ACCESSIBILITY="1"
declare -x QT_IM_MODULE="ibus"
declare -x QT_QPA_PLATFORMTHEME="gtk2"
declare -x 
SESSION_MANAGER="local/eiskaffee:@/tmp/.ICE-unix/1911,unix/eiskaffee:/tmp/.ICE-unix/1911"
declare -x SHELL="/bin/bash"
declare -x SHLVL="1"
declare -x SSH_AGENT_PID="2048"
declare -x SSH_AUTH_SOCK="/tmp/ssh-XXXXXXtd5uft/agent.1911"
declare -x TERM="xterm-256color"
declare -x USER="claude"
declare -x VBCC="/opt/amiga/vbcc"
declare -x VTE_VERSION="7003"
declare -x XAUTHORITY="/home/claude/.Xauthority"
declare -x XDG_CONFIG_DIRS="/etc/xdg"
declare -x XDG_CURRENT_DESKTOP="XFCE"
declare -x 
XDG_DATA_DIRS="/usr/share/xfce4:/usr/local/share/:/usr/share/:/usr/share"
declare -x XDG_GREETER_DATA_DIR="/var/lib/lightdm/data/claude"
declare -x XDG_MENU_PREFIX="xfce-"
declare -x XDG_RUNTIME_DIR="/run/user/1000"
declare -x XDG_SEAT="seat0"
declare -x XDG_SEAT_PATH="/org/freedesktop/DisplayManager/Seat0"
declare -x XDG_SESSION_CLASS="user"
declare -x XDG_SESSION_DESKTOP="xfce"
declare -x XDG_SESSION_ID="2"
declare -x XDG_SESSION_PATH="/org/freedesktop/DisplayManager/Session0"
declare -x XDG_SESSION_TYPE="x11"
declare -x XDG_VTNR="7"
declare -x XMODIFIERS="@im=ibus"



On 2023-05-25 09:20, Jochen Sprickerhof wrote:
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.html

Can 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 <cla...@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: cla...@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>

--
https://mathr.co.uk

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