Linux 6.9.5 build fails with LTO

[ruffi123456789]

OS: Arch llvm: 17.0.6-5 lld: 17.0.6-1 Clang: 17.0.6-2

My config: _distro="" _version="" _EXT_CONFIG_PATH=\~/.config/frogminer/linux-tkg.cfg _NUKR="true" _git_mirror="" _kernel_work_folder="" _kernel_source_folder="" CUSTOM_GCC_PATH="" CUSTOM_LLVM_PATH="" _force_all_threads="true" _noccache="false" _kernel_on_diet="false" _modprobeddb="true" _modprobeddb_db_path=\~/.config/modprobed.db _menunconfig="false" _diffconfig="" _diffconfig_name="" _dracut_options="--lz4" _configfile="" _config_updating="olddefconfig" _debugdisable="false" _STRIP="true" _cpusched="eevdf" _compiler="llvm" _libunwind_replace="" _llvm_ias="1" _lto_mode="full" _preempt_rt="" _preempt_rt_force="" _sched_yield_type="" _rr_interval="" _ftracedisable="true" _numadisable="true" _misc_adds="true" _tickless="1" _acs_override="" _bcachefs="false" _ntsync="false" _waydroid="" _glitched_base="true" _zenify="true" _compileroptlevel="2" _processor_opt="skylakex" _cacule_rdb="false" _cacule_rdb_interval="19" _tt_high_hz="false" _smt_nice="" _eevdf_sched_ext_support="true" _random_trust_cpu="true" _timer_freq="" _default_cpu_gov="ondemand" _aggressive_ondemand="true" _tcp_cong_alg="" _custom_commandline="intel_pstate=passive kernel.split_lock_mitigate=0" _clear_patches="true" _openrgb="true" _custom_pkgbase="" _kernel_localversion="" _NR_CPUS_value="" _install_after_building="prompt" _logging_use_script="yes" _fsync_backport="true" _fsync_legacy="true" _fsync_futex2="false" _zfsfix="true" _runqueue_sharing="" _irq_threading="false" _mglru="true" _community_patches="" _user_patches="true" _user_patches_no_confirm="false" _config_fragments="true" _config_fragments_no_confirm="false"

This worked previously, last version I got to compile with exactly these settings was 6.9.3. Although I think my clang got updated since then.

Now compilation fails when linking with these errors:

make[2]: [scripts/Makefile.modfinal:56: fs/nls/nls_ucs2_utils.ko] Error 139 make[2]: Deleting file 'fs/nls/nls_ucs2_utils.ko' make[2]: Waiting for unfinished jobs.... BTF [M] fs/btrfs/btrfs.ko BTF [M] crypto/cmac.ko make[1]: [/home/acesls/Programs/linux-tkg/linux-src-git/Makefile:1860: modules] Error 2 make[1]: Waiting for unfinished jobs.... arch/x86/tools/insn_decoder_test: success: Decoded and checked 8697182 instructions TEST posttest arch/x86/tools/insn_sanity: Success: decoded and checked 1000000 random instructions with 0 errors (seed:0x5ea88295)make[2]: [scripts/Makefile.modfinal:56: fs/nls/nls_ucs2_utils.ko] Error 139 make[2]: Deleting file 'fs/nls/nls_ucs2_utils.ko' make[2]: Waiting for unfinished jobs.... BTF [M] fs/btrfs/btrfs.ko BTF [M] crypto/cmac.ko make[1]: [/home/acesls/Programs/linux-tkg/linux-src-git/Makefile:1860: modules] Error 2 make[1]: Waiting for unfinished jobs.... arch/x86/tools/insn_decoder_test: success: Decoded and checked 8697182 instructions TEST posttest arch/x86/tools/insn_sanity: Success: decoded and checked 1000000 random instructions with 0 errors (seed:0x5ea88295)

make: *** [Makefile:240: __sub-make] Error 2 ==> ERROR: A failure occurred in build().`

Trying the same with LTO thin gives another but similiar error:

make[2]: [scripts/Makefile.modfinal:56: lib/crypto/libcurve25519.ko] Error 139 make[2]: Deleting file 'lib/crypto/libcurve25519.ko' make[2]: Waiting for unfinished jobs.... BTF [M] drivers/input/joystick/xpad.ko make[2]: [scripts/Makefile.modfinal:56: drivers/pinctrl/intel/pinctrl-sunrisepoint.ko] Error 139 make[2]: Deleting file 'drivers/pinctrl/intel/pinctrl-sunrisepoint.ko' make[1]: [/home/acesls/Programs/linux-tkg/linux-src-git/Makefile:1860: modules] Error 2 make[1]: *** Waiting for unfinished jobs.... arch/x86/tools/insn_decoder_test: success: Decoded and checked 7742882 instructions TEST posttest arch/x86/tools/insn_sanity: Success: decoded and checked 1000000 random instructions with 0 errors (seed:0x8dd1ba0c)

make: *** [Makefile:240: __sub-make] Error 2

Sadly I didn't save the whole log, but I will gladly recompile the Kernel to capture the log to post here if someone thinks that'll help.

Building the kernel with _lto_mode="no" works as expected

[ptr1337]

See: https://github.com/acmel/dwarves/issues/53

[sirlucjan]

Also: https://lore.kernel.org/all/ZnCWRMfRDMHqSxBb@x1/