undefined symbol: crc32

[leyvi]

A number of applications (and services) are failing to start, for this reason (i2pd used for example):

Code: Select all

i2pd                      | * Starting Invisible Internet Protocol daemon ...
i2pd                      |/usr/bin/i2pd: symbol lookup error: /usr/lib64/libi2pd.so: undefined symbol: crc32
i2pd                      | * start-stop-daemon: failed to start `/usr/bin/i2pd'
i2pd                      | * Failed to start Invisible Internet Protocol daemon                                                                                                                                                                                  [ !! ]
i2pd                      | * ERROR: i2pd failed to start

How do I fix this?

EDIT
I've already tried rebuilding i2pd and glibc, to no avail.

[Hu]

A quick check of files in /usr/lib64 says that, for me, this symbol is provided by /usr/lib64/libz.so. Does yours provide that? If yes, does i2pd link to libz? If no, why not? If I had to guess, this will again be tied to your unusual environment, so linking to your current emerge --info would probably be helpful.

[leyvi]

I tried rebuilding sys-libs/zlib, which also didn't help.

I'd use a pastebin, but mine's offline (been like that for a while, going to switch soon):

Code: Select all

Portage 3.0.77 (python 3.14.3-final-0, default/linux/amd64/23.0/split-usr/desktop/plasma, gcc-15, glibc-2.43, 6.19.4-gentoo x86_64)
=================================================================
                         System Settings
=================================================================
System uname: Linux-6.19.4-gentoo-x86_64-AMD_Ryzen_9_7900X_12-Core_Processor-with-glibc2.43
KiB Mem:    64746884 total,   3038840 free
KiB Swap:   65535996 total,  65522864 free
Timestamp of repository gentoo: Sun, 01 Mar 2026 09:15:00 +0000
Head commit of repository gentoo: 71f5864682b7ca0ad5765bd9dbe051c90794eed3
Timestamp of repository guru: Fri, 27 Feb 2026 04:01:09 +0000
Head commit of repository guru: 8faf5e0a60fc388763d6588da30e26b7c1c0cf4c

Head commit of repository kde: 0cf47ef4c83b6bdf341bc592503dc02456f052bb

Head commit of repository librewolf: 123e8d2c92138f4cd2900b0bc321684138b0fd53

Head commit of repository pentoo: cdb7d0e5e7673bcb98f7c3a5f1071a942a514b03

Head commit of repository steam-overlay: 1c591b53ffcd9c744b7b2b130c87e652a7d11a86

Head commit of repository wayland-desktop: 2102eb44b4e9571112fc2edb642129abd075b840

Head commit of repository x11: 6c0050760b497487e548b06f2eee526193b9c892

sh bash 5.3_p9
ld GNU ld (Gentoo 2.45 p3) 2.45.0
ccache version 4.12.3 [enabled]
app-misc/pax-utils:        1.3.10::gentoo
app-shells/bash:           5.3_p9::gentoo
dev-build/autoconf:        2.13-r8::gentoo, 2.72-r6::gentoo
dev-build/automake:        1.18.1::gentoo
dev-build/cmake:           4.2.3::gentoo
dev-build/libtool:         2.5.4::gentoo
dev-build/make:            4.4.1-r102::gentoo
dev-build/meson:           1.10.1::gentoo
dev-java/java-config:      2.3.4::gentoo
dev-lang/perl:             5.42.0-r1::gentoo
dev-lang/python:           3.11.14::gentoo, 3.12.12::gentoo, 3.13.12::gentoo, 3.14.3::gentoo
dev-lang/rust:             1.84.1-r2::gentoo, 1.86.0-r2::gentoo, 1.87.0-r1::gentoo, 1.89.0::gentoo
dev-lang/rust-bin:         1.86.0-r1::gentoo, 1.89.0::gentoo, 1.90.0::gentoo, 1.91.0::gentoo, 1.92.0::gentoo, 1.93.0::gentoo, 1.93.1::gentoo
dev-util/ccache:           4.12.3::gentoo
llvm-core/clang:           19.1.7-r1::gentoo, 20.1.8::gentoo, 21.1.8::gentoo, 22.1.0-r2::gentoo
llvm-core/lld:             17.0.6::gentoo, 19.1.7::gentoo, 20.1.8::gentoo, 21.1.8::gentoo, 22.1.0::gentoo
llvm-core/llvm:            17.0.6-r3::gentoo, 19.1.7::gentoo, 20.1.8::gentoo, 21.1.8::gentoo, 22.1.0-r2::gentoo
sys-apps/baselayout:       2.18-r1::gentoo
sys-apps/openrc:           0.63::gentoo
sys-apps/sandbox:          2.46::gentoo
sys-devel/binutils:        2.45-r1::gentoo, 2.46.0::gentoo
sys-devel/binutils-config: 5.6::gentoo
sys-devel/gcc:             15.2.1_p20260214::gentoo
sys-devel/gcc-config:      2.12.2::gentoo
sys-kernel/linux-headers:  6.18::gentoo (virtual/os-headers)
sys-libs/glibc:            2.43::gentoo
Repositories:

gentoo
    location: /var/db/repos/gentoo
    sync-type: rsync
    sync-uri: rsync://rsync.gentoo.org/gentoo-portage
    priority: -1000
    volatile: False
    sync-rsync-verify-metamanifest: yes
    sync-rsync-extra-opts:
    sync-rsync-verify-jobs: 12
    sync-rsync-verify-max-age: 24

guru
    location: /var/db/repos/guru
    sync-type: git
    sync-uri: https://github.com/gentoo-mirror/guru.git
    masters: gentoo
    volatile: False

kde
    location: /var/db/repos/kde
    sync-type: git
    sync-uri: https://anongit.gentoo.org/git/proj/kde.git
    masters: gentoo
    volatile: False

librewolf
    location: /var/db/repos/librewolf
    sync-type: git
    sync-uri: https://codeberg.org/librewolf/gentoo.git
    masters: gentoo
    volatile: False

pentoo
    location: /var/db/repos/pentoo
    sync-type: git
    sync-uri: https://github.com/pentoo/pentoo-overlay.git
    masters: gentoo
    volatile: False

steam-overlay
    location: /var/db/repos/steam-overlay
    sync-type: git
    sync-uri: https://github.com/anyc/steam-overlay.git
    masters: gentoo
    volatile: False

wayland-desktop
    location: /var/db/repos/wayland-desktop
    sync-type: git
    sync-uri: https://github.com/bsd-ac/wayland-desktop.git
    masters: gentoo
    volatile: False

x11
    location: /var/db/repos/x11
    sync-type: git
    sync-uri: https://anongit.gentoo.org/git/proj/x11.git
    masters: gentoo
    volatile: False

Binary Repositories:

gentoobinhost
    location: /var/cache/binhost/gentoobinhost
    priority: 1
    sync-uri: https://gentoo.osuosl.org/releases/amd64/binpackages/23.0/x86-64-v3
    verify-signature: None

Installed sets: @esteam
ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="*"
AR="llvm-ar"
AS="llvm-as"
CBUILD="x86_64-pc-linux-gnu"
CC="clang"
CFLAGS="-march=znver4 -mtune=znver4 -O3 -pipe -flto=full"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /etc/teamspeak3-server/ts3server.ini /etc/teamspeak3-server/ts3server_mariadb.ini /etc/teamspeak3-server/tsdns_settings.ini /usr/lib64/libreoffice/program/sofficerc /usr/share/config /var/bind /var/lib/i2pd/certificates"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php8.4/ext-active/ /etc/php/apache2-php8.5/ext-active/ /etc/php/cgi-php8.4/ext-active/ /etc/php/cgi-php8.5/ext-active/ /etc/php/cli-php8.4/ext-active/ /etc/php/cli-php8.5/ext-active/ /etc/php/fpm-php8.4/ext-active/ /etc/php/fpm-php8.5/ext-active/ /etc/php/phpdbg-php8.4/ext-active/ /etc/php/phpdbg-php8.5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CPPFLAGS="-march=znver4 -mtune=znver4 -O3 -pipe -flto=full"
CXX="clang++"
CXXFLAGS="-march=znver4 -mtune=znver4 -O3 -pipe -flto=full"
DISTDIR="/mnt/Bulk-Storage/cache/distfiles"
EMERGE_DEFAULT_OPTS="--ask -j1 -l12.0 --backtrack=500 --keep-going=y --with-bdeps=y --complete-graph=y --columns"
ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GDK_PIXBUF_MODULE_FILE GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR XDG_STATE_HOME"
FC="flang"
FCFLAGS="-march=znver4 -mtune=znver4 -O3 -pipe -flto=full"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg-live ccache clean-logs compress-index config-protect-if-modified distlocks ebuild-locks fail-clean fixlafiles ipc-sandbox merge-sync merge-wait multilib-strict network-sandbox news parallel-fetch parallel-install pid-sandbox pkgdir-index-trusted preserve-libs protect-owned qa-unresolved-soname-deps sandbox strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-march=znver4 -mtune=znver4 -O3 -pipe -flto=full"
GENTOO_MIRRORS="https://mirror.isoc.org.il/pub/gentoo/ https://gentoo.mirror.garr.it/ http://gentoo.mirror.garr.it/ https://mirrors.evoluso.com/gentoo/ http://mirrors.evoluso.com/gentoo/ https://mirror.leaseweb.com/gentoo/ http://mirror.leaseweb.com/gentoo/ rsync://mirror.leaseweb.com/gentoo/ https://ftp.snt.utwente.nl/pub/os/linux/gentoo http://ftp.snt.utwente.nl/pub/os/linux/gentoo ftp://ftp.snt.utwente.nl/pub/os/linux/gentoo rsync://ftp.snt.utwente.nl/gentoo"
LANG="en_US.utf8"
LD="ld.lld"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,-z,pack-relative-relocs -Wl,--lto-O3 -fuse-ld=lld"
LEX="flex"
NM="llvm-nm"
PKGDIR="/var/cache/binpkgs"
PORTAGE_COMPRESS="bzip2"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/var/tmp"
RANLIB="llvm-ranlib"
RUSTFLAGS="-C opt-level=3 -C target-cpu=znver4 -C lto -C link-args=-Wl -C link-args=--lto-O3 -C link-args=-flto=full -C link-args=-fuse-ld=lld"
SHELL="/bin/bash"
STRIP="llvm-strip"
USE="32 64 a52 aac acl acpi activities aio alsa amd64 archive asm avif bash-completion bluetooth bluray boost bpf branding brotli btrfs bzip2 cairo cdda cdr cet clang crypt cups custom-cflags cxx dbus declarative default-lld dhcpcd doc dri dts dvd dvdr ebpf elogind encode exif fapi ffmpeg fftw flac fuse gdbm geoclue gif gmp go gpg graphite gstreamer gtk gui gzip haptic hip http2 http3 https hwaccel hwloc iconv icu introspection io-uring ipv4 ipv6 jemalloc jit jpeg jpegxl kde kf6compat ksysguard lcms libass libnotify libreadline libtirpc llvm loudness lto lua lz4 mad man markdown matroska mng mp3 mp4 mpeg multilib native-extensions ncurses network nfs nft nls nptl ocr offload ogg opencl opencv opengl openmp openssl orc pango pcre pdf pgo pipewire pkcs11 plasma png policykit postproc ppds profile pulseaudio python qml qt6 quic rar readline rocm rootless rust rustfmt samba screencast script sdl semantic-desktop sha512 smart sound spatialaudio spell split-usr sqlite ssl startup-notification strip svg syslog system-* tcmalloc test-rust threads tiff tls tools tpm trayicon truetype udev udisks unicode upnp upower usb usbredir vaapi verify-sig vorbis vpx vulkan wayland webp websockets widgets wpa_supplicant wxwidgets x264 x265 x32 xattr xcb xft xml xv xvid xz zeroconf zip zlib" ABI_X86="64 32" ADA_TARGET="gcc_15" AMDGPU_TARGETS="gfx1102" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_anon authn_dbm authn_file authz_dbm authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir env expires ext_filter file_cache filter headers include info log_config logio mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx avx2 avx512f avx512dq avx512cd avx512bw avx512vl avx512vbmi f16c fma3 mmx mmxext pclmul popcnt rdrand sha sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 bmi2" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax navcom oncore skytraq superstar2 tsip tripmate tnt" GRUB_PLATFORMS="efi-64" GUILE_SINGLE_TARGET="3-0" GUILE_TARGETS="3-0" INPUT_DEVICES="libinput" KERNEL="linux" L10N="en-US en he" LCD_DEVICES="bayrad cfontz glk hd44780 lb216 lcdm001 mtxorb text" LLVM_SLOT="21" LLVM_TARGETS="AArch64 AMDGPU ARM BPF DirectX RISCV SPIRV WebAssembly X86" LUA_SINGLE_TARGET="luajit" LUA_TARGETS="luajit lua5-4" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php8-3" POSTGRES_TARGETS="postgres17" PYTHON_SINGLE_TARGET="python3_13" PYTHON_TARGETS="python3_14 python3_13 python3_12 python3_11 pypy3 pypy3_11" QEMU_SOFTMMU_TARGETS="arm i386 riscv32 riscv64 x86_64 aarch64 loongarch64 m68k mips mips64 mips64el mipsel ppc ppc64 rx sparc sparc64" QEMU_USER_TARGETS="x86_64 aarch64 aarch64_be arm armeb i386 loongarch64 m68k mips mips64 mips64el mipsel mipsn32 mipsn32el ppc ppc64 ppc64le riscv32 riscv64 sparc sparc64 sparc32plus" RUBY_TARGETS="ruby34 ruby40" RUST_SYSROOTS="bpf wasm" VIDEO_CARDS="amdgpu radeonsi radeon" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipp2p iface geoip fuzzy condition tarpit sysrq proto logmark ipmark dhcpmac delude chaos account"
Unset:  ADDR2LINE, ARFLAGS, ASFLAGS, CCLD, CONFIG_SHELL, CPP, CTARGET, CXXFILT, ELFEDIT, EXTRA_ECONF, F77FLAGS, GCOV, GPROF, INSTALL_MASK, LC_ALL, LFLAGS, LIBTOOL, LINGUAS, MAKE, MAKEFLAGS, MAKEOPTS, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PYTHONPATH, READELF, SIZE, STRINGS, YACC, YFLAGS

=================================================================
                        Package Settings
=================================================================

net-vpn/i2pd-2.58.0::gentoo was built with the following:
USE="upnp -test" ABI_X86="(64)"

[sdauth]

Hi,
What's the output of :

Code: Select all

zgrep CRC32 /proc/config.gz
zgrep TRIM /proc/config.gz

?

[leyvi]

Hi,
What's the output of :

Code: Select all

zgrep CRC32 /proc/config.gz
zgrep TRIM /proc/config.gz

?

Code: Select all

$ zgrep CRC32 /proc/config.gz
CONFIG_NET_CRC32C=y
CONFIG_CRYPTO_CRC32C=y
CONFIG_CRYPTO_CRC32=y
CONFIG_CRC32=y
CONFIG_CRC32_ARCH=y
$ zgrep TRIM /proc/config.gz
# CONFIG_TRIM_UNUSED_KSYMS is not set

[leyvi]

This is still an issue for me, anyone know how to fix it?

[Hu]

I asked 10 days ago several questions that I suspect will be relevant to finding the answer. Please respond to all of them.

[leyvi]

I asked 10 days ago several questions that I suspect will be relevant to finding the answer. Please respond to all of them.

I believe I did; I provided emerge --info, and tried rebuilding the packages (including zlib, which usually fixes problems related to my unconventional compiler flags, especially when I change them). The only thing I didn't check was symbol tables, so I will do that soon.

[grknight]

For linkage, check ldd (or lddtree) of /usr/lib64/libi2pd.so and /usr/bin/i2pd

[user]

Hi leyvi,
Do not use

Code: Select all

-fuse-ld=lld

for i2pd compilation.

[leyvi]

For linkage, check ldd (or lddtree) of /usr/lib64/libi2pd.so and /usr/bin/i2pd

Code: Select all

 $ lddtree /usr/lib64/libi2pd.so
/usr/lib64/libi2pd.so (interpreter => None)
    libstdc++.so.6 => /usr/lib/gcc/x86_64-pc-linux-gnu/15/libstdc++.so.6
        libm.so.6 => /lib64/libm.so.6
    libgcc_s.so.1 => /usr/lib/gcc/x86_64-pc-linux-gnu/15/libgcc_s.so.1
    libc.so.6 => /lib64/libc.so.6
    ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2
 $ lddtree /usr/bin/i2pd
/usr/bin/i2pd (interpreter => /lib64/ld-linux-x86-64.so.2)
    libi2pd.so => /usr/lib64/libi2pd.so
    libi2pdclient.so => /usr/lib64/libi2pdclient.so
    libi2pdlang.so => /usr/lib64/libi2pdlang.so
    libboost_program_options.so.1.90.0 => /usr/lib64/libboost_program_options.so.1.90.0
        libboost_container.so.1.90.0 => /usr/lib64/libboost_container.so.1.90.0
    libssl.so.3 => /usr/lib64/libssl.so.3
    libcrypto.so.3 => /usr/lib64/libcrypto.so.3
    libminiupnpc.so.21 => /usr/lib64/libminiupnpc.so.21
    libstdc++.so.6 => /usr/lib/gcc/x86_64-pc-linux-gnu/15/libstdc++.so.6
        libm.so.6 => /lib64/libm.so.6
    libgcc_s.so.1 => /usr/lib/gcc/x86_64-pc-linux-gnu/15/libgcc_s.so.1
    libc.so.6 => /lib64/libc.so.6
    ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2

[leyvi]

Hi leyvi,
Do not use

Code: Select all

-fuse-ld=lld

for i2pd compilation.

This fixed it. Fun fact: I tried this before, and it didn't work. It only worked after you suggested it

[Hu]

To be clear, then, the bad version failed to link to libz.so, and removing -fuse-ld=lld built a good version that does link to libz.so? Why does using lld leave out libz.so?

[leyvi]

To be clear, then, the bad version failed to link to libz.so, and removing -fuse-ld=lld built a good version that does link to libz.so? Why does using lld leave out libz.so?

I have no idea, but I'm as curious as you are.

[Hu]

This sounds like a bug somewhere. Please keep us apprised of your investigation, so we can determine whether this is an lld bug or a defect in some build system (i2pd or perhaps one of its dependencies).

[leyvi]

This sounds like a bug somewhere. Please keep us apprised of your investigation, so we can determine whether this is an lld bug or a defect in some build system (i2pd or perhaps one of its dependencies).

Affirmative. I'll keep an eye out.