Hi, today is a public holiday in Germany and I have time to play.
[ INTRO - Let me introduce myself ] By heart and with love - I build my Linux-kernel with LLVM/Clang and LLVM tools (LLVM "binutils"). 10+ years ago I provided quassel-nightly Debian packages for AMD64 for interested people. Quassel is an IRC-client based on QT-v5 and written in C++ and most people using KDE/desktop love it. [ MR12 ] By accident I fell over Merge-Request "MR12" in Debian's salsa GITLAB quassel repository. "RFC: Build with LLVM 16 and CFI enabled" Link: https://salsa.debian.org/qt-kde-team/extras/quassel/-/merge_requests/12/diffs?commit_id=b97aeec74b443679c958798ab55e21ea0dbe23fe [ THE EXPERIMENT ] After the transition to QT version 5.15.15 finished I was thinking of testing the MR12 patch. Link: https://release.debian.org/transitions/html/qtbase-abi-5-15-15.html [ TRYOUT-1 - Simple Rebuild ] First, I did a simple rebuild with NO changes (uses GCC toolchain + GNU/binutils). [ TRYOUT-2 - MR12 and LLVM-19 ] Second, I applied MR12 and built successfully with Debian's LLVM/Clang v19.1.2 (v19.1.3 is on the way). [ NUMBERS ] "Numbers talk, bullshit walks." (Linus Torvalds) $ du -m LATEST*/*dbgsym*.deb | sort -n 4 LATEST.MR12/quassel-core-dbgsym_0.14.0-4~dileks_amd64.deb 5 LATEST.MR12/quassel-client-dbgsym_0.14.0-4~dileks_amd64.deb 8 LATEST.MR12/quassel-dbgsym_0.14.0-4~dileks_amd64.deb 16 LATEST/quassel-core-dbgsym_0.14.0-3~dileks_amd64.deb 33 LATEST/quassel-client-dbgsym_0.14.0-3~dileks_amd64.deb 42 LATEST/quassel-dbgsym_0.14.0-3~dileks_amd64.deb $ du -k LATEST*/quassel_*amd64.deb | sort -n 1692 LATEST.MR12/quassel_0.14.0-4~dileks_amd64.deb 1868 LATEST/quassel_0.14.0-3~dileks_amd64.deb 6816 LATEST.MR12.dwarf5-nostrip/quassel_0.14.0-5~dileks_amd64.deb WOW, great numbers! [ DWARF VERSION 5 ] Oh, I forgot I am a DWARF-v5 lover (@Nick How it is going with the baby :-))! >From Christian's MR12 patch: [ debian/rules ] export CC=clang export CXX=clang++ export RANLIB=llvm-ranlib export AR=llvm-ar export DEB_CFLAGS_MAINT_APPEND=-gdwarf-4 -flto -fvisibility=hidden -fsanitize=cfi export DEB_CXXFLAGS_MAINT_APPEND=-gdwarf-4 -flto -fvisibility=hidden -fsanitize=cfi export DEB_LDFLAGS_MAINT_APPEND=-flto -fvisibility=hidden -fsanitize=cfi ^^ Uses DWARF-v4 + Clang-LTO + Clang-CFI [ TRYOUT-3 - DWARFv5 + nostrip ] INFO: Substitute -gdwarf-4 with -gdwarf-5 $ LC_ALL=C DEB_BUILD_OPTIONS=nostrip debuild ^^ Work(s) Around - NOSTRIP [ TRYOUT-4 - DWARFv5 + strip ] $ LC_ALL=C DEB_BUILD_OPTIONS=strip debuild ... make[1]: Leaving directory '/home/dileks/src/quassel/quassel-0.14.0' dh_installlogrotate dh_icons dh_perl dh_link dh_strip_nondeterminism dh_compress dh_fixperms dh_missing dh_dwz -a dwz: debian/quassel-client/usr/bin/quasselclient: Unknown debugging section .debug_addr dwz: debian/quassel-core/usr/bin/quasselcore: Unknown debugging section .debug_addr dwz: debian/quassel/usr/bin/quassel: Unknown debugging section .debug_addr dh_dwz: error: dwz -- debian/quassel/usr/bin/quassel returned exit code 1 dh_dwz: error: dwz -- debian/quassel-core/usr/bin/quasselcore returned exit code 1 dh_dwz: error: dwz -- debian/quassel-client/usr/bin/quasselclient returned exit code 1 dh_dwz: error: Aborting due to earlier error make: *** [debian/rules:23: binary] Error 25 dpkg-buildpackage: error: fakeroot debian/rules binary subprocess returned exit status 2 debuild: fatal error at line 1184: dpkg-buildpackage -us -uc -ui failed ^^ DWZ ERRORS Unsure how to solve this. [ TRYOUT-5 - DWZ + dwarf-5 ] dwz lists this option: -5, --dwarf-5 Emit DWARF 5 standardized supplementary object files instead of GNU extension .debug_altlink. I tried a dwz-wrapper: # cd /usr/bin/ # mv dwz dwz.bin # ln -sf mydwz dwz [ mydwz ] #!/bin/bash dwz.bin --dwarf-5 "$@" -EOF- ^^ NO SUCCESS - the dwz-wrapper is used! ... dh_dwz -a dwz.bin: debian/quassel/usr/bin/quassel: Unknown debugging section .debug_addr dwz.bin: debian/quassel-client/usr/bin/quasselclient: Unknown debugging section .debug_addr dh_dwz: error: dwz -- debian/quassel/usr/bin/quassel returned exit code 1 dh_dwz: error: dwz -- debian/quassel-client/usr/bin/quasselclient returned exit code 1 dwz.bin: debian/quassel-core/usr/bin/quasselcore: Unknown debugging section .debug_addr dh_dwz: error: dwz -- debian/quassel-core/usr/bin/quasselcore returned exit code 1 dh_dwz: error: Aborting due to earlier error My Debian system is based on unstable AMD64. CC LLVM Linux-kernel folks + some Debian folks LLVM, dwz, debhelper, quassel, QT/KDE and Christian. Any help appreciated. Best thanks. Best regards, -Sedat- P.S.: I want to use the FULL LLVM ECO system to build quassel/unstable AMD64 on Debian. Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Makefile#n473
