ToolChain/LTO - Debian Wiki (2024)

This page describes the approach to use link time optimizations for package builds, starting with the bookworm development cycle.

Contents

  1. Summary
  2. Implementation
  3. Testing
  4. Known issues
  5. References
  6. Packages currently failing to build with LTO on amd64

Summary

Link time optimization (LTO) is a way to run optimizations across multiple translation units, enabling more opportunities for optimizations at link time. Each source file is translated to an intermediate representation, which is then used at link to build an executable or a shared object/library. The optimizations allow for faster code and smaller files.

Compiler flags for LTO are injected in dpkg-buildflags, and can be overridden in the package build. LTO is not enabled by default.

Implementation

Starting with dpkg 1.21.0, dpkg-buildflags introduced a new optimization area, which adds the necessary flags to enable LTO. To enable LTO in the rules file, set

  • exportDEB_BUILD_MAINT_OPTIONS=optimize=+lto

It can be explicitly disabled by

  • exportDEB_BUILD_MAINT_OPTIONS=optimize=-lto

Disabling might be necessary, if the upstream project also provides an option to build with LTO.

Enabling LTO adds the flags -flto=auto-ffat-lto-objects to CFLAGS, CXXFLAGS, OBJCFLAGS ... and the flag -flto=auto to LDFLAGS. -ffat-lto-objects is used to generate both the intermediate representation and the object code in the object files, the latter needed to ship .o and .a files in packages. All intermediate code is stripped out by dh_strip.

Building with -ffat-lto-objects slows down the build a bit, however we have around 2000 packages shipping .o and .a files. If a package doesn't ship these object files, then a package can remove the -ffat-lto-objects option.

dpkg 1.21.x is available in Debian since bookworm (currently in testing). To test a LTO build, the flags have to be manually added.

Testing

Two archive test rebuild were done to watch for regressions introduced by adding the LTO flags.

The LTO page on the Ubuntu wiki has test rebuilds for other architectures as well.

Regressions are build failures failing in the LTO build, but not in the reference build.

Filed bug reports: https://bugs.debian.org/cgi-bin/pkgreport.cgi?tag=ftbfs-lto;users=debian-gcc@lists.debian.org

Known issues

  • Link time optimization lets the compiler use more memory than a normal link step. Work arounds are reducing the parallelism, or serialization of different link time optimizations.
  • C++ symbols files differ, usually because some symbols for template instantiations are optimized out.
  • GCC and clang use different LTO options. The injected flags use the GCC variants, and are ignored by clang for now.
  • Link time optimization may exacerbate existing bugs where the program has undefined behaviour.

References

Link time optimizations are already enabled in other Linux distributions, such as:

Packages currently failing to build with LTO on amd64

Build logs at http://qa-logs.debian.net/2022/06/09/dpkglto/

"Natural Language Processing (Japanese)" <team+pkg-nlp-ja@tracker.debian.org> chasenAaron M. Ucko <ucko@debian.org> fltk1.1 fltk1.3Abou Al Montacir <abou.almontacir@sfr.fr> fpc (U) lazarus (U) view3dscene (U)Adam Borowski <kilobyte@angband.pl> libpmemobj-cpp memkindAdam Majer <adamm@zombino.com> qbs (U)Adrian Knoth <adi@drcomp.erfurt.thur.de> zam-plugins (U)Adrien Boussicault <adrien.boussicault@labri.fr> mlvAlastair McKinstry <mckinstry@debian.org> emoslib ferret-visAlberto Garcia <berto@igalia.com> libspectrumAlessandro Ghedini <ghedo@debian.org> valgrindAlexander Kjäll <alexander.kjall@gmail.com> rust-wayland-protocols (U)Alexandre Mestiashvili <mestia@debian.org> spades (U)Alf Gaida <agaida@siduction.org> liblxqt (U) libqtxdg (U)Andrea Pappacoda <andrea@pappacoda.it> mbedtlsAndreas Beckmann <anbe@debian.org> papi (U) pocl (U)Andreas Henriksson <andreas@fatal.se> libeconfAndreas Tille <tille@debian.org> abinit (U) civetweb (U) gatb-core (U) lagan (U) libatomic-queue (U) libbpp-core (U) libbpp-phyl (U) libbpp-popgen (U) libbpp-qt (U) libbpp-raa (U) libbpp-seq (U) libbpp-seq-omics (U) libcifpp (U) libedlib (U) libfastahack (U) libgenome (U) libmuscle (U) libncl (U) libseqlib (U) libtabixpp (U) parsinsert (U) plast (U) qwtplot3d (U) sambamba (U) spades (U) spoa (U) terraphast (U)Andrej Shadura <andrewsh@debian.org> audacious (U) imx-code-signing-tool inputplug openpaceAndres Salomon <dilinger@debian.org> chromium (U)Andrew Lee (李健秋) <ajqlee@debian.org> liblxqt (U) libqtxdg (U)Android Tools Maintainers <android-tools-devel@lists.alioth.debian.org> android-platform-art android-platform-frameworks-base android-platform-toolsAnsgar <ansgar@debian.org> dune-common (U)Anthony Fok <foka@debian.org> libsass (U)Anton Gladky <gladk@debian.org> sundials (U)Arnaud Quette <aquette@debian.org> powermanAron Xu <aron@debian.org> libgooglepinyin (U) network-manager (U) opencc (U)Arun Kumar Pariyar <openarungeek@gmail.com> deepin-album (U) deepin-calculator (U) deepin-movie-reborn (U) dtkcore (U) qtmpris (U)Asias He <asias@debian.org> opencc (U)Aurelien Jarno <aurel32@debian.org> libftdi libftdi1Aurélien COUDERC <coucouf@debian.org> kaccounts-integration (U) kactivities-kf5 (U) kactivities-stats (U) kbookmarks (U) kcalcore (U) kconfig (U) kconfigwidgets (U) kcontacts (U) kcoreaddons (U) kdav (U) kdeclarative (U) kdelibs4support (U) kholidays (U) khtml (U) kidletime (U) kio (U) kirigami2 (U) kjs (U) kjsembed (U) knewstuff (U) kpmcore (U) kross (U) kscreenlocker (U) ktexteditor (U) ktp-common-internals (U) kwallet-kf5 (U) kwayland (U) libkcddb (U) libkf5kexiv2 (U) libksysguard (U) networkmanager-qt (U) okteta (U) plasma-framework (U) plasma-workspace (U) syndication (U) threadweaver (U)Ayatana Packagers <pkg-ayatana-devel@alioth-lists.debian.net> snapd-glibBalint Reczey <balint@balintreczey.hu> ffmpeg (U) libtrio wiresharkBalint Reczey <rbalint@ubuntu.com> p8-platform (U)Barak A. 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<team+mir@tracker.debian.org> mirDebian Mobcom Maintainers <Debian-mobcom-maintainers@lists.alioth.debian.org> openbsc osmo-fl2k osmo-msc osmo-pcu osmo-sgsnDebian Multimedia Maintainers <debian-multimedia@lists.debian.org> audacious cheesecutter cmt dpf-plugins ffmpeg libva libvpx mpeg2dec taglib zam-pluginsDebian Network Simulators Team <team+netsim@tracker.debian.org> tclclDebian OCaml Maintainers <debian-ocaml-maint@lists.debian.org> ocamlDebian OpenCL Maintainers <pkg-opencl-devel@lists.alioth.debian.org> poclDebian PhotoTools Maintainers <pkg-phototools-devel@lists.alioth.debian.org> libraw openjphDebian Printing Team <debian-printing@lists.debian.org> cups-bjnpDebian Python Team <team+python@tracker.debian.org> beancount python-cmarkgfm python-gssapi python-lz4 (U) pywavelets qscintilla2Debian QA Group <packages@qa.debian.org> coinor-dylp coinor-vol crossguid liblastfm libofa libopendbx riemann-c-client snacc webdruid xmlrpc-cDebian QEMU Team 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afflibDebian Sugar Team <pkg-sugar-devel@lists.alioth.debian.org> sugar-toolkit-gtk3Debian Telepathy maintainers <pkg-telepathy-maintainers@lists.alioth.debian.org> farstream-0.2Debian UBports Team <team+ubports@tracker.debian.org> dbus-cpp deviceinfo gsettings-qt libqofono mir (U) net-cpp process-cpp qtpim-opensource-src (U)Debian UEFI Maintainers <debian-efi@lists.debian.org> efivarDebian UEFI maintainers <debian-efi@lists.debian.org> pesignDebian VoIP Team <pkg-voip-maintainers@lists.alioth.debian.org> dahdi-tools ucommonDebian Wine Party <debian-wine@lists.debian.org> wineDebian X Strike Force <debian-x@lists.debian.org> weston xorg-serverDebian Xilinx Package Maintainers <team+pkg-xilinx@tracker.debian.org> target-factoryDebian+Ubuntu MATE Packaging Team <debian-mate@lists.debian.org> onboardDebian/Kubuntu Qt/KDE Maintainers <debian-qt-kde@lists.debian.org> libaccounts-qt oktetaDebianOnMobile Maintainers <debian-on-mobile-maintainers@alioth-lists.debian.net> gnome-callsDebichem Team <debichem-devel@lists.alioth.debian.org> abinit indigo rdkitDennis Braun <d_braun@kabelmail.de> dpf-plugins (U) zam-plugins (U)Diane Trout <diane@debian.org> libaccounts-qt (U) signond (U) telepathy-logger-qt (U) telepathy-qt (U)Diane Trout <diane@ghic.org> kaccounts-integration (U) ktp-common-internals (U) libkolabxml (U) phonon (U)Diego M. Rodriguez <diego@moreda.io> qiskit-aer (U)Dima Kogan <dkogan@debian.org> sundials (U)Dmitry E. Oboukhov <unera@debian.org> tarantool (U)Dmitry Shachnev <mitya57@debian.org> adwaita-qt qbs (U) qt3d-opensource-src (U) qtbase-opensource-src (U) qtbase-opensource-src-gles (U) qtcharts-opensource-src (U) qtdeclarative-opensource-src (U) qtdeclarative-opensource-src-gles (U) qtlocation-opensource-src (U) qtmultimedia-opensource-src (U) qtquickcontrols2-opensource-src (U) qtscript-opensource-src (U) qtscxml-everywhere-src (U) qtsvg-opensource-src (U) qtvirtualkeyboard-opensource-src (U) qtwayland-opensource-src (U) qtwebchannel-opensource-src (U) qtwebkit-opensource-src (U)Dmitry Smirnov <onlyjob@debian.org> python-lz4Dominic Hargreaves <dom@earth.li> perl (U)Doug Torrance <dtorrance@debian.org> macaulay2 (U) mpsolve (U)Ejabberd Packaging Team <ejabberd@packages.debian.org> erlang-p1-tlsEmilio Pozuelo Monfort <pochu@debian.org> cairo (U) weston (U)Emmanuel Bourg <ebourg@apache.org> openjfx (U)Ervin Hegedüs <airween@gmail.com> tlf (U)Evangelos Ribeiro Tzaras <devrtz-debian@fortysixandtwo.eu> gnome-calls (U)Felix Geyer <fgeyer@debian.org> qca2 (U) qtsvg-opensource-src (U)Felix Salfelder <felix@salfelder.org> gnucap (U)Felix Zielcke <fzielcke@z-51.de> grub2 (U)Francesco Paolo Lovergine <frankie@debian.org> postgis (U)Gard Spreemann <gspr@nonempty.org> lbfgsbGavin Lai (賴建宇) <gavin09@gmail.com> skypatGergely Pilisi <mail.pilisig@gmail.com> eclipse-titanGRUB Maintainers <pkg-grub-devel@alioth-lists.debian.net> grub2Gudjon I. Gudjonsson <gudjon@gudjon.org> comedilib qscintilla2 (U) qwtplot3d (U) sdcc (U)Gürkan Myczko <gurkan@phys.ethz.ch> cheesecutter (U)Henry-Nicolas Tourneur <debian@nilux.be> gnome-calls (U)Herbert Parentes Fortes Neto <hpfn@debian.org> libcdk5Hideki Yamane <henrich@debian.org> chasen (U)Hsieh-Tseng Shen <woodrow.shen@gmail.com> ledmonHu Feng <hufeng@uniontech.com> dtkcore (U)Héctor Orón Martínez <zumbi@debian.org> weston (U)Ian Jackson <ijackson@chiark.greenend.org.uk> adnsIceyer <iceyers@gmail.com> gsettings-qt (U)intrigeri <intrigeri@debian.org> apparmor (U)Iustin Pop <iustin@debian.org> python-pylibacl python-pyxattrIvan Hu <ivan.hu@ubuntu.com> tpm2-tss (U)Jackson Doak <noskcaj@ubuntu.com> qqwingJames Cowgill <jcowgill@debian.org> ffmpeg (U) python-sfml (U)James McCoy <jamessan@debian.org> rust-wayland-egl (U)James Tocknell <aragilar@gmail.com> sundials (U)Jan Mojžíš <jan.mojzis@gmail.com> naclJaromír Mikeš <mira.mikes@seznam.cz> zam-plugins (U)Jeremy Bicha <jbicha@debian.org> cairo (U) snapd-glib (U)Jeremy Bicha <jbicha@ubuntu.com> libsigc++-2.0 (U) onboard (U)Jerome Benoit <calculus@rezozer.net> scscp-imcce (U)Joao Eriberto Mota Filho <eriberto@debian.org> afflib (U)Johannes 'josch' Schauer <josch@debian.org> fuzzyliteJohn Horigan <john@glyphic.com> aggJon Bernard <jbernard@debian.org> ustJonas Smedegaard <dr@jones.dk> gcc-or1k-elf (U) gesftpserver iwd librandomx (U) libsass (U) libunivalue (U) sugar-toolkit-gtk3 (U)Jonathan Carter <jcc@debian.org> kpmcore (U)Jonathan McDowell <noodles@earth.li> sdcc (U)Jordi Mallach <jordi@debian.org> grub2 (U)Jose Luis Blanco Claraco <joseluisblancoc@gmail.com> mrptJulian Andres Klode <jak@debian.org> grub2 (U) keepassxcJulien Dutheil <julien.dutheil@univ-montp2.fr> libbpp-core (U) libbpp-phyl (U) libbpp-popgen (U) libbpp-qt (U) libbpp-raa (U) libbpp-seq (U) libbpp-seq-omics (U)Jérémy Bobbio <lunar@debian.org> libmygpo-qtJörg Frings-Fürst <debian@jff.email> psocksxx xbase64Kai-Chung Yan <seamlik@debian.org> android-platform-art (U)Kai-Chung Yan <seamlikok@gmail.com> android-platform-frameworks-base (U)Kambiz Darabi <darabi@m-creations.net> sbcl (U)Kilian Krause <kilian@debian.org> ircd-irc2 (U)Kurt Kremitzki <kkremitzki@debian.org> pyside2 (U)Kurt Roeckx <kurt@roeckx.be> ircd-irc2Lars Op den Kamp <lars.opdenkamp@pulse-eight.com> p8-platformLaszlo Boszormenyi (GCS) <gcs@debian.org> fuse google-perftools nngLaurent Bigonville <bigon@debian.org> cairo (U) farstream-0.2 (U) nutLifeng Sun <lifongsun@gmail.com> clhep (U)Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org> phonon (U) qbs (U) qoauth (U) qt3d-opensource-src (U) qtbase-opensource-src (U) qtbase-opensource-src-gles (U) qtcharts-opensource-src (U) qtdeclarative-opensource-src (U) qtdeclarative-opensource-src-gles (U) qtlocation-opensource-src (U) qtmultimedia-opensource-src (U) qtquickcontrols2-opensource-src (U) qtscript-opensource-src (U) qtscxml-everywhere-src (U) qtsvg-opensource-src (U) qtvirtualkeyboard-opensource-src (U) qtwayland-opensource-src (U) qtwebkit-opensource-src (U)Lu YaNing <dluyaning@gmail.com> qt6-3d (U) qt6-5compat (U) qt6-charts (U) qt6-lottie (U) qt6-multimedia (U) qt6-quick3d (U) qt6-scxml (U) qt6-svg (U) qt6-virtualkeyboard (U) qt6-wayland (U) qt6-webengine (U)Luciano Bello <luciano@debian.org> qiskit-aer (U)Ludovic Brenta <lbrenta@debian.org> libgtkadaLudovic Drolez <ldrolez@debian.org> swish-eLuigi Gangitano <luigi@debian.org> libecap squidLXQt Packaging Team <pkg-lxqt-devel@lists.alioth.debian.org> liblxqt libqtxdgMa Aiguo <imaiguo@gmail.com> deepin-album (U)Maarten L. Hekkelman <maarten@hekkelman.com> libcifpp (U)Magnus Holmgren <holmgren@debian.org> adns (U) pike8.0Maintainers of Mozilla-related packages <team+pkg-mozilla@tracker.debian.org> firefox-esrMario Limonciello <mario.limonciello@dell.com> efivar (U)Mario Limonciello <superm1@gmail.com> tpm2-tss (U)Marius Gripsgard <marius@ubports.com> mir (U) net-cpp (U)Mark Brown <broonie@debian.org> tuaMark Purcell <msp@debian.org> dahdi-tools (U) exiv2 (U)Markus Koschany <apo@debian.org> binaryenMarkus Wanner <markus@bluegap.ch> postgis (U)Martin <debacle@debian.org> python-gssapi (U)Martin Uecker <martin.uecker@med.uni-goettingen.de> bart (U)Mateusz Łukasik <mati75@linuxmint.pl> audacious (U)Mathieu Malaterre <malat@debian.org> openjph (U)Mathieu Trudel-Lapierre <cyphermox@ubuntu.com> tpm2-tssMatteo F. Vescovi <mfv@debian.org> libraw (U)Matthias Klumpp <mak@debian.org> mir-core (U) mustache-d (U) stdx-allocator (U)Maxime Chambonnet <maxzor@maxzor.eu> rocm-smi-lib (U)maximilian attems <maks@debian.org> linux (U)Maximiliano Curia <maxy@debian.org> flatbuffers grantlee5 (U) libaccounts-qt (U) phonon (U) polkit-qt-1 (U) qca2 (U) telepathy-logger-qt (U)Mehdi Dogguy <mehdi@debian.org> ocaml (U)Michael Banck <mbanck@debian.org> abinit (U) indigo (U) rdkit (U)Michael Biebl <biebl@debian.org> libsigc++-2.0 (U) network-manager (U)Michael Gilbert <mgilbert@debian.org> chromium (U) wine (U)Michael Hudson-Doyle <mwhudson@debian.org> liblinear (U) libsvm (U)Michael Jeanson <mjeanson@debian.org> ust (U)Michael R. Crusoe <crusoe@debian.org> libssw (U) spades (U) vg (U)Michael Tautschnig <mt@debian.org> binutils-h8300-hms diagnosticsMichael Tokarev <mjt@tls.msk.ru> qemu (U)Michał Zając <quintasan@kubuntu.org> ktp-common-internals (U) telepathy-logger-qt (U) telepathy-qt (U)Michel Le Bihan <michel@lebihan.pl> chromium (U)Mika Pflüger <debian@mikapflueger.de> bornagain (U)Mike Gabriel <sunweaver@debian.org> dbus-cpp (U) deviceinfo (U) gsettings-qt (U) libpam-freerdp2 (U) libpam-x2go (U) libqofono (U) mir (U) net-cpp (U) onboard (U) process-cpp (U) qtpim-opensource-src (U) snapd-glib (U) weston (U)Mike Hommey <glandium@debian.org> firefox-esr (U)Mitsuya Shibata <mty.shibata@gmail.com> marisa (U)Mo Zhou <lumin@debian.org> blis (U) double-conversion (U) onednn (U) rocm-smi-lib (U) simdjson tbb (U)Modestas Vainius <modax@debian.org> phonon (U) polkit-qt-1 (U)Muammar El Khatib <muammar@debian.org> sillyNadiya Sitdykova <rovenskasa@gmail.com> gatb-core (U)Nico Schlömer <nico.schloemer@gmail.com> blis (U)Nicolas Boulenguez <nicolas@debian.org> gcc-or1k-elf libgnatcoll-bindings libgtkada (U) libncursesada libtexttoolsNicolas Dandrimont <olasd@debian.org> beancount (U) python-cmarkgfm (U)Niko Tyni <ntyni@debian.org> perlNilesh Patra <nilesh@debian.org> libatomic-queue (U)Noah Meyerhans <noahm@debian.org> qoauth tcptraceNobuhiro Iwamatsu <iwamatsu@debian.org> bluez (U) flatbuffers (U) massivethreads swupdate (U) target-factory (U)NOKUBI Takatsugu <knok@daionet.gr.jp> chasen (U)Norbert Preining <norbert@preining.info> kaccounts-integration (U) kactivities-kf5 (U) kbookmarks (U) kcalcore (U) kconfigwidgets (U) kcontacts (U) kcoreaddons (U) kdav (U) kdeclarative (U) kdelibs4support (U) kholidays (U) khtml (U) kidletime (U) kio (U) kirigami2 (U) kjs (U) kjsembed (U) kpmcore (U) kross (U) kscreenlocker (U) ktp-common-internals (U) kwallet-kf5 (U) libkcddb (U) libkdegames (U) libkf5kexiv2 (U) libksysguard (U) libktorrent (U) networkmanager-qt (U) plasma-framework (U) plasma-workspace (U) rocm-smi-lib (U) syndication (U) threadweaver (U)Ola Lundqvist <opal@debian.org> gngb (U)Ole Streicher <olebole@debian.org> eso-midas (U)Olek Wojnar <olekw.dev@gmail.com> skstream (U)Ondřej Nový <onovy@debian.org> libvpx (U)Ondřej Surý <ondrej@debian.org> libreswan (U) softhsm2 (U)Osamu Aoki <osamu@debian.org> opencc (U)Pascal Packaging Team <pkg-pascal-devel@lists.alioth.debian.org> fpc lazarus view3dscenePatrick Franz <deltaone@debian.org> kscreenlocker (U) libksysguard (U) plasma-workspace (U) qt6-3d (U) qt6-5compat (U) qt6-base (U) qt6-charts (U) qt6-declarative (U) qt6-lottie (U) qt6-multimedia (U) qt6-quick3d (U) qt6-scxml (U) qt6-svg (U) qt6-tools (U) qt6-virtualkeyboard (U) qt6-wayland (U) qt6-webchannel (U) qt6-webengine (U) qtcharts-opensource-src (U) qtvirtualkeyboard-opensource-src (U) qtwayland-opensource-src (U)Paul Gevers <elbrus@debian.org> fpc (U) lazarus (U) view3dscene (U)Paul Klos <kolab@klos2day.nl> libkolabxml (U)Paul Wise <pabs@debian.org> sptagPaul Wouters <paul@libreswan.org> libreswan (U)Peter Colberg <peter@colberg.org> ucommon (U)Peter Michael Green <plugwash@debian.org> fpc (U)Peter Van Eynde <pvaneynd@debian.org> libsigsegv (U) sbcl (U)Philip Rinn <rinni@inventati.org> gtkspellmmPhilipp Huebner <debalance@debian.org> erlang-p1-tls (U)Picca Frédéric-Emmanuel <picca@debian.org> bornagain (U)Pierre Chifflier <pollux@debian.org> libprelude libpreludedb prelude-lml prelude-managerPierre Saramito <pierre.saramito@imag.fr> rheolef (U)Pino Toscano <pino@debian.org> grantlee5 (U) kdb (U) kdiagram (U) kproperty (U) kreport (U) kseexpr (U) libkcddb (U) libkf5kexiv2 (U) qt3d-opensource-src (U) qtbase-opensource-src (U) qtbase-opensource-src-gles (U) qtdeclarative-opensource-src (U) qtdeclarative-opensource-src-gles (U) qtmultimedia-opensource-src (U) qtquickcontrols2-opensource-src (U) qtscript-opensource-src (U) qtsvg-opensource-src (U) qtwayland-opensource-src (U)Punit Agrawal <punit@debian.org> target-factory (U)qinxialei <xialeiqin@gmail.com> deepin-calculator (U)Ralf Treinen <treinen@debian.org> ocaml (U)Reiner Herrmann <reiner@reiner-h.de> muslReinhard Tartler <siretart@tauware.de> ffmpeg (U) libva (U)Robbie Harwood (frozencemetery) <rharwood@club.cc.cmu.edu> python-gssapi (U)Robert Ancell <robert.ancell@canonical.com> snapd-glib (U)Roberto Lumbreras <rover@debian.org> proxy-suiteROCm Team <debian-ai@lists.debian.org> rocm-smi-libRoger A. Light <roger@atchoo.org> mosquittoRoman Tsisyk <roman@tarantool.org> tarantoolRuben Undheim <ruben.undheim@gmail.com> openbsc (U) osmo-msc (U) osmo-pcu (U) osmo-sgsn (U) yosys (U)Salvatore Bonaccorso <carnil@debian.org> criu linux (U)Sam Hocevar (Debian packages) <sam+deb@zoy.org> mpeg2dec (U)Samuel Thibault <sthibault@debian.org> mlv (U)Sandro Knauß <hefee@debian.org> cmocka (U) kcalcore (U) kcontacts (U) kdav (U) libkolabxml (U) qcoro (U) qtwebchannel-opensource-src (U)Santiago Garcia Mantinan <manty@debian.org> squid (U)Santiago Ruano Rincón <santiago@debian.org> sugar-toolkit-gtk3 (U)Sascha Steinbiss <satta@debian.org> libssw (U) libtabixpp (U) spades (U)Scarlett Moore <sgmoore@kde.org> kscreenlocker (U) libksysguard (U) plasma-workspace (U) qtscxml-everywhere-src (U) qtwebchannel-opensource-src (U) signond (U)Sebastian Dröge <slomo@debian.org> libvpx (U) pitiviSebastian Kuzminsky <seb@highlab.com> yosys (U)Sebastian Ramacher <sramacher@debian.org> ffmpeg (U) libva (U)Sebastian Reichel <sre@debian.org> nesccSebastien Delafond <seb@debian.org> bornagain (U)Sebastien Jodogne <s.jodogne@gmail.com> civetweb (U)Simon Quigley <tsimonq2@debian.org> mir (U) qbs (U) qt3d-opensource-src (U) qtbase-opensource-src (U) qtbase-opensource-src-gles (U) qtcharts-opensource-src (U) qtdeclarative-opensource-src (U) qtdeclarative-opensource-src-gles (U) qtlocation-opensource-src (U) qtmultimedia-opensource-src (U) qtquickcontrols2-opensource-src (U) qtscript-opensource-src (U) qtsvg-opensource-src (U) qtvirtualkeyboard-opensource-src (U) qtwayland-opensource-src (U) qtwebchannel-opensource-src (U) qtwebkit-opensource-src (U)Sjoerd Simons <sjoerd@debian.org> farstream-0.2 (U) network-manager (U)Stefano Zacchiroli <zack@debian.org> beancount (U)Steffen Moeller <moeller@debian.org> lagan (U) libatomic-queue (U)Stephen Frost <sfrost@debian.org> postgis (U)Stephen Kitt <skitt@debian.org> g810-led gcc-mingw-w64 gdb-mingw-w64 libxmp mingw-w64 wine (U)Steve Capper <steven.capper@gmail.com> tbb (U)Steve M. Robbins <smr@debian.org> exiv2 (U)Steve McIntyre <93sam@debian.org> efivar (U) grub2 (U) libdebian-installer (U) pesign (U)Stéphane Glondu <glondu@debian.org> ocaml (U)Sune Vuorela <debian@pusling.com> qt3d-opensource-src (U) qtdeclarative-opensource-src (U) qtdeclarative-opensource-src-gles (U) qtmultimedia-opensource-src (U) qtquickcontrols2-opensource-src (U) qtscript-opensource-src (U) qtsvg-opensource-src (U) qtwayland-opensource-src (U)Sune Vuorela <sune@debian.org> grantlee5 (U) libkcddb (U) libkdegames (U) libkf5kexiv2 (U) qtbase-opensource-src (U) qtbase-opensource-src-gles (U)SZ Lin (林上智) <szlin@debian.org> libgpiod skypat (U) swupdate (U) tpm2-abrmdSébastien Villemot <sebastien@debian.org> libsigsegv (U) sbcl (U)Sérgio Benjamim <sergio_br2@yahoo.com.br> libretro-bsnes-mercury (U)Thomas Andrejak <thomas.andrejak@gmail.com> libprelude (U) libpreludedb (U) prelude-lml (U) prelude-manager (U)Thomas Krennwallner <tkren@kr.tuwien.ac.at> gringo (U)Thomas Pierson <contact@thomaspierson.fr> kdsoap libmygpo-qt (U)Thorsten Alteholz <debian@alteholz.de> cups-bjnp (U) openbsc (U) openvlbi (U) osmo-fl2k (U) osmo-msc (U) osmo-pcu (U) osmo-sgsn (U)Thorsten Glaser <tg@mirbsd.de> dietlibc (U)Tim Booth <tbooth@ceh.ac.uk> parsinsert (U)Timo Aaltonen <tjaalton@debian.org> python-gssapi (U)Timo Jyrinki <timo@debian.org> qt3d-opensource-src (U) qtbase-opensource-src (U) qtbase-opensource-src-gles (U) qtdeclarative-opensource-src (U) qtdeclarative-opensource-src-gles (U) qtlocation-opensource-src (U) qtmultimedia-opensource-src (U) qtpim-opensource-src (U) qtquickcontrols2-opensource-src (U) qtscript-opensource-src (U) qtsvg-opensource-src (U) qtwayland-opensource-src (U) qtwebkit-opensource-src (U)Timo Röhling <timo@gaussglocke.de> qhull (U)tony mancill <tmancill@debian.org> wsjtx (U)Torsten Marek <shlomme@debian.org> qscintilla2 (U)Tu Qinggang <tuqinggang@uniontech.com> deepin-calculator (U) dtkcore (U)Tzafrir Cohen <tzafrir@debian.org> dahdi-tools (U)Uditha Atukorala <ua@nuked.zone> psocksxx (U)Umang Parmar <umangjparmar@gmail.com> android-platform-frameworks-base (U)Utopia Maintenance Team <pkg-utopia-maintainers@lists.alioth.debian.org> network-managerVangelis Mouhtsis <vangelis@gnugr.org> onboard (U)Vasudev Kamath <vasudev@copyninja.info> pugixmlVincent Danjean <vdanjean@debian.org> papi (U) pocl (U)xiao sheng wen <atzlinux@sina.com> opencc (U)Ximin Luo <infinity0@debian.org> ocaml (U)Yangfl <mmyangfl@gmail.com> deepin-calculator (U) deepin-movie-reborn (U) libsimpleini litehtml qr-code-generatorYanhao Mo <yanhaocs@gmail.com> deepin-calculator (U) deepin-movie-reborn (U) dtkcore (U) gsettings-qt (U) qtmpris (U)Ying-Chun Liu (PaulLiu) <paulliu@debian.org> tpm2-abrmd (U) tpm2-tss (U)YunQiang Su <syq@debian.org> opencc (U)YunQiang Su <wzssyqa@gmail.com> libgooglepinyin (U) tclcl (U)Étienne Mollier <emollier@debian.org> rocm-smi-lib (U) spades (U)أحمد المحمودي (Ahmed El-Mahmoudy) <aelmahmoudy@sabily.org> gnucap (U)أحمد المحمودي (Ahmed El-Mahmoudy) <aelmahmoudy@users.sourceforge.net> elinks systemc

Build logs at https://people.debian.org/~doko/logs/20210228/filtered/gcc10lto/

"Natural Language Processing (Japanese)" <team+pkg-nlp-ja@tracker.debian.org> chasenA Mennucc1 <mennucc1@debian.org> mplayer (U)Aaron M. Ucko <ucko@debian.org> fltk1.1 fltk1.3Adam Borowski <kilobyte@angband.pl> memkind pmdk vmemAdam Majer <adamm@zombino.com> qbs (U)Adrian Knoth <adi@drcomp.erfurt.thur.de> zam-plugins (U)Adrien Boussicault <adrien.boussicault@labri.fr> mlvAl Stone <ahs3@debian.org> numactl (U)Alastair McKinstry <mckinstry@debian.org> atlas-ecmwf emoslib ferret-vis libtoolAlberto Garcia <berto@igalia.com> webkit2gtk (U) wpewebkit (U)Alessandro Ghedini <ghedo@debian.org> valgrindAlessio Treglia <alessio@debian.org> muse (U)Alexander Strasser <eclipse7@gmx.net> ffmpeg (U)Alexandre Mestiashvili <mestia@debian.org> spades (U)Alf Gaida <agaida@siduction.org> libfm-qt (U) liblxqt (U) libqtxdg (U) libquazip (U)Alvin Chen <sonoma001@gmail.com> tpm2-pkcs11Andreas Beckmann <anbe@debian.org> papi (U) pocl (U)Andreas Bombe <aeb@debian.org> ghdl (U)Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com> ffmpeg (U)Andreas Henriksson <andreas@fatal.se> golang-github-bmatsuo-lmdb-go (U) mender-client (U)Andreas Tille <tille@debian.org> adun.app (U) civetweb (U) gatb-core (U) igraph (U) jellyfish1 (U) lagan (U) libatomic-queue (U) libbiod (U) libbpp-core (U) libbpp-phyl (U) libbpp-popgen (U) libbpp-qt (U) libbpp-raa (U) libbpp-seq (U) libbpp-seq-omics (U) libcifpp (U) libedlib (U) libfastahack (U) libgenome (U) libmuscle (U) libncl (U) libquazip (U) libseqlib (U) libsmithwaterman (U) libtabixpp (U) ngspice (U) plast (U) qwtplot3d (U) sambamba (U) spades (U) spoa (U)Andrei Zavada <johnhommer@gmail.com> aghermann (U)Andrej Shadura <andrewsh@debian.org> audacious (U)Andrew Lee (李健秋) <ajqlee@debian.org> libfm-qt (U) liblxqt (U) libqtxdg (U)Android Tools Maintainers <android-tools-devel@lists.alioth.debian.org> android-platform-art android-platform-frameworks-base android-platform-libnativehelper android-platform-system-core android-platform-system-tools-aidl android-platform-system-tools-hidlAnsgar <ansgar@debian.org> dune-common (U) dune-geometry (U)Anthony Fok <foka@debian.org> cvs-fast-export hugo (U) libsass (U)Antoine Beaupré <anarcat@debian.org> dmarc-cat (U)Anton Gladky <gladk@debian.org> libopenshot (U)Apollon Oikonomopoulos <apoikos@debian.org> dovecot (U)APT Development Team <deity@lists.debian.org> apt python-aptArnaud Quette <aquette@debian.org> powermanArnaud Rebillout <arnaud.rebillout@collabora.com> notary (U)Aron Xu <aron@debian.org> fcitx-qt5 (U) libgooglepinyin (U) network-manager (U)Arun Kumar Pariyar <openarungeek@gmail.com> dtkcore (U) dtkwm (U) qtmpris (U)Asias He <asias.hejun@gmail.com> unar (U)Aurelien Jarno <aurel32@debian.org> libftdi libftdi1Aurélien COUDERC <coucouf@debian.org> kaccounts-integration (U) kpmcore (U) libkf5kexiv2 (U) okteta (U)Ayatana Packagers <pkg-ayatana-devel@alioth-lists.debian.net> snapd-glibBalint Reczey <balint@balintreczey.hu> crossguid (U) ffmpeg (U) libtrio snaccBalint Reczey <rbalint@ubuntu.com> p8-platform (U) wiresharkBarak A. Pearlmutter <bap@debian.org> mlpack (U) qhull (U)Bastian Blank <waldi@debian.org> linux (U) lvm2 (U) thin-provisioning-tools (U)Bdale Garbee <bdale@gag.com> libmawk (U)Ben Fiedler <debian@services.bfiedler.ch> aerc (U)Ben Hutchings <benh@debian.org> linux (U)Benjamin Mako Hill <mako@debian.org> mairixBernd Zeimetz <bzed@debian.org> ceph (U) collectd (U) gpsdBjoern Ricks <bjoern.ricks@intevation.de> grantlee5 (U)Boyuan Yang <byang@debian.org> dtkcore (U) dtkwm (U) gsettings-qt (U) qtdbusextended (U) taglib (U)Bryan Newbold <bnewbold@robocracy.org> scmCamm Maguire <camm@debian.org> fricas gclCarlos Donizete Froes <coringao@riseup.net> surgescript (U)Carlos Maddela <e7appew@gmail.com> dmallocCarsten Schoenert <c.schoenert@t-online.de> ngspice (U) thunderbirdCeph Packaging Team <team+ceph@tracker.debian.org> cephCESNET <rkrejci@cesnet.cz> libyang (U)ChangZhuo Chen (陳昌倬) <czchen@debian.org> gcin (U) libfm-qt (U) liblxqt (U) libqtxdg (U) textql (U)Charles Plessy <plessy@debian.org> samtools-legacy (U)Chen-Tse Tsai <ctse.tsai@gmail.com> liblinear (U) libsvm (U)Chirayu Desai <chirayudesai1@gmail.com> android-platform-frameworks-base (U) android-platform-libnativehelper (U) android-platform-system-core (U)Chow Loong Jin <hyperair@debian.org> libzen tinyxml2Chris Halls <halls@debian.org> libreoffice (U)Chris Lamb <lamby@debian.org> libfiuChristian Kastner <ckk@debian.org> liblinear (U) libsvm (U)Christian Marillat <marillat@deb-multimedia.org> crossguidChristian Seiler <christian@iwakd.de> dietlibcChristian T. Steigies <cts@debian.org> moon-buggyChristoph Berg <myon@debian.org> js8call (U) tlf (U) wsjtx (U)Christoph Egger <christoph@debian.org> libsigsegv (U) sbcl (U)Christoph Goehre <chris@sigxcpu.org> thunderbird (U)Christopher James Halse Rogers <raof@ubuntu.com> mir (U)Christos Trochalakis <ctrochalakis@debian.org> python-confluent-kafka (U)Colin Watson <cjwatson@debian.org> grub2 (U)Collectd Packaging Team <team+collectd@tracker.debian.org> collectdCyril Brulebois <cyril@debamax.com> crowdsecDafydd Harries <daf@debian.org> python-gssapi (U)Daniel Jared Dominguez <Jared_Dominguez@Dell.com> pesign (U)Daniel Kahn Gillmor <dkg@fifthhorseman.net> faketime libreswanDaniel Schepler <schepler@debian.org> libkdegames (U)Daniele E. Domenichelli <ddomenichelli@drdanz.it> robot-testing-framework (U)Daniele Tricoli <eriol@mornie.org> pywavelets (U)Dave Hibberd <d@vehibberd.com> wsjtx (U)David Kalnischkies <donkult@debian.org> apt (U)David Lamparter <equinox-debian@diac24.net> libyangDavid Paleino <dapal@debian.org> libpgfDavid Prévot <taffit@debian.org> cmockaDavid Weinehall <tao@debian.org> scummvm (U)Debian ALSA Maintainers <pkg-alsa-devel@lists.alioth.debian.org> alsa-libDebian AppArmor Team <pkg-apparmor-team@lists.alioth.debian.org> apparmorDebian Astro Team <debian-astro-maintainers@lists.alioth.debian.org> eso-midas wscleanDebian Bazel Team <bazel-team@lists.launchpad.net> bazel-bootstrapDebian Bazel Team <team+bazel@tracker.debian.org> bazel-bootstrap (U)Debian Bluetooth Maintainers <team+pkg-bluetooth@tracker.debian.org> bluezDebian Chromium Team <chromium@packages.debian.org> chromiumDebian Common Lisp Team <debian-common-lisp@lists.debian.org> libsigsegv sbclDebian Cryptocoin Team <team+cryptocoin@tracker.debian.org> libunivalueDebian D Language Group <team+d-team@tracker.debian.org> dcontainers gir-to-d mir-core mustache-d stdx-allocatorDebian Deep Learning Team <debian-ai@lists.debian.org> onednnDebian Deepin Packaging Team <pkg-deepin-devel@lists.alioth.debian.org> dtkcore dtkwm gsettings-qt (U) qtdbusextended qtmprisDebian DNS Team <team+dns@tracker.debian.org> softhsm2Debian Electronics Packaging Team <pkg-electronics-devel@alioth-lists.debian.net> sdccDebian Electronics Team <pkg-electronics-devel@alioth-lists.debian.net> gnucap ngspiceDebian Electronics Team <pkg-electronics-devel@lists.alioth.debian.org> ghdl libmawkDebian Games Team <pkg-games-devel@lists.alioth.debian.org> colobot gngb python-sfml scummvm skstream surgescriptDebian GCC Maintainers <debian-gcc@lists.debian.org> autofdoDebian GNOME Maintainers <pkg-gnome-maintainers@lists.alioth.debian.org> cairo evolution-data-server glib-d gtk-d libsigc++-2.0 tilixDebian GNUstep maintainers <pkg-gnustep-maintainers@lists.alioth.debian.org> cenon.app gnustep-back gnustep-baseDebian Go Packaging Team <pkg-go-maintainers@lists.alioth.debian.org> acmetool golang-github-cloudflare-cfssl golang-github-pzhin-go-sophia gost goval-dictionary libpod notary textqlDebian Go Packaging Team <team+pkg-go@tracker.debian.org> aerc crowdsec (U) dmarc-cat fscrypt go-cve-dictionary go-exploitdb golang-github-bmatsuo-lmdb-go golang-github-containers-buildah golang-github-containers-storage golang-github-rubenv-sql-migrate hugo mender-client prometheus-libvirt-exporter skopeoDebian Hamradio Maintainers <debian-hams@lists.debian.org> js8call tlf wsjtxDebian HPC Team <debian-hpc@lists.debian.org> infinipath-psm papiDebian Input Method Team <debian-input-method@lists.debian.org> fcitx-qt5 gcin libgooglepinyinDebian Java Maintainers <pkg-java-maintainers@lists.alioth.debian.org> openjfxDebian Julia Team <pkg-julia-devel@lists.alioth.debian.org> juliaDebian KDE Extras Team 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osmo-bsc osmo-fl2k osmo-msc osmo-pcu osmo-sgsnDebian Multimedia Maintainers <debian-multimedia@lists.debian.org> audacious cheesecutter ffmpeg gsequencer libopenshot libva mpeg2dec mplayer muse taglib zam-pluginsDebian Network Simulators Team <team+netsim@tracker.debian.org> tclclDebian OpenCL Maintainers <pkg-opencl-devel@lists.alioth.debian.org> intel-compute-runtime poclDebian OpenCL team <pkg-opencl-devel@lists.alioth.debian.org> intel-graphics-compilerDebian Perl Group <pkg-perl-maintainers@lists.alioth.debian.org> libcryptx-perlDebian PhotoTools Maintainers <pkg-phototools-devel@lists.alioth.debian.org> librawDebian PHP Maintainers <team+pkg-php@tracker.debian.org> php7.4Debian Printing Team <debian-printing@lists.debian.org> cups-bjnp ipp-usb rasterviewDebian Python Modules Team <python-modules-team@lists.alioth.debian.org> python-cmarkgfm pywaveletsDebian Python Team <team+python@tracker.debian.org> beancount python-confluent-kafka python-lz4 (U) qscintilla2Debian QA Group <packages@qa.debian.org> coinor-dylp coinor-vol libofa libopendbx riemann-c-client webdruid xmlrpc-cDebian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org> cantor kactivities-kf5 karchive kbookmarks kconfig kdb kdeclarative kdelibs4support kfilemetadata-kf5 khtml kiconthemes kio kjs kjsembed knewstuff kpmcore kproperty kreport kross kscreenlocker ktexteditor kwallet-kf5 kwayland libksysguard phonon plasma-framework plasma-workspace polkit-qt-1 qbs qca2 qt3d-opensource-src qtbase-opensource-src qtbase-opensource-src-gles qtcharts-opensource-src qtdeclarative-opensource-src qtdeclarative-opensource-src-gles qtlocation-opensource-src qtmir (U) qtmultimedia-opensource-src qtpim-opensource-src qtquickcontrols2-opensource-src qtscript-opensource-src qtscxml-everywhere-src qtspell qtsvg-opensource-src qtvirtualkeyboard-opensource-src qtwayland-opensource-src qtwebchannel-opensource-src qtwebkit-opensource-src signond syndication threadweaverDebian Remote Maintainers <debian-remote@lists.debian.org> libpam-freerdp2 libpam-x2goDebian Sass team <pkg-sass-devel@lists.alioth.debian.org> libsassDebian Science Maintainers <debian-science-maintainers@alioth-lists.debian.net> mlpack qhullDebian Science Maintainers <debian-science-maintainers@lists.alioth.debian.org> blis bornagain clhep dune-common dune-geometry fasttext gringo highwayhash liblinear libsvm mpsolve open3d rheolef robot-testing-framework scscp-imcce tbb yosysDebian Science Team <debian-science-maintainers@lists.alioth.debian.org> double-conversion openblas qwtplot3dDebian Security Tools <team+pkg-security@tracker.debian.org> afflib aflplusplusDebian SELinux maintainers <selinux-devel@lists.alioth.debian.org> libsemanage libsepolDebian SOGo Maintainers <pkg-sogo-maintainers@lists.alioth.debian.org> sopeDebian Sugar Team <pkg-sugar-devel@lists.alioth.debian.org> sugar-toolkit-gtk3Debian Telepathy maintainers <pkg-telepathy-maintainers@lists.alioth.debian.org> farstream-0.2Debian UBports Team <team+ubports@tracker.debian.org> gsettings-qt lomiri-app-launch lomiri-download-manager mir (U) net-cpp process-cpp qtmir qtpim-opensource-src (U)Debian UEFI Maintainers <debian-efi@lists.debian.org> efivarDebian UEFI maintainers <debian-efi@lists.debian.org> pesignDebian VoIP Team <pkg-voip-maintainers@lists.alioth.debian.org> dahdi-tools ucommonDebian WebKit Maintainers <pkg-webkit-maintainers@lists.alioth.debian.org> webkit2gtk wpewebkitDebian Wine Party <debian-wine@lists.debian.org> wineDebian X Strike Force <debian-x@lists.debian.org> weston xorg-server xserver-xorg-video-intelDebian+Ubuntu MATE Packaging Team <debian-mate@lists.debian.org> onboardDebian/Kubuntu KDE Extras Team <pkg-kde-extras@lists.alioth.debian.org> qt-gstreamerDebian/Kubuntu Qt/KDE Maintainers <debian-qt-kde@lists.debian.org> kaccounts-integration ktp-common-internals libaccounts-qt libkcddb libkdegames libkf5kexiv2 marble oktetaDebianOnMobile Maintainers <debian-on-mobile-maintainers@alioth-lists.debian.net> purple-lurch purple-xmpp-carbonsDebichem Team <debichem-devel@lists.alioth.debian.org> indigo openmolcas pymol rdkitDennis Braun <d_braun@kabelmail.de> muse (U) zam-plugins (U)Diane Trout <diane@debian.org> libaccounts-qt (U) signond (U) telepathy-logger-qt (U) telepathy-qt (U)Diane Trout <diane@ghic.org> kaccounts-integration (U) ktp-common-internals (U) libkolabxml (U) phonon (U) qt-gstreamer (U)Didier Raboud <odyx@debian.org> colobot (U) cups-bjnp (U) ipp-usb (U) rasterview (U)Dmitry E. Oboukhov <unera@debian.org> libtorrent (U) tarantool (U)Dmitry Shachnev <mitya57@debian.org> adwaita-qt qbs (U) qt3d-opensource-src (U) qtbase-opensource-src (U) qtbase-opensource-src-gles (U) qtcharts-opensource-src (U) qtdeclarative-opensource-src (U) qtdeclarative-opensource-src-gles (U) qtlocation-opensource-src (U) qtmultimedia-opensource-src (U) qtquickcontrols2-opensource-src (U) qtscript-opensource-src (U) qtscxml-everywhere-src (U) qtsvg-opensource-src (U) qtvirtualkeyboard-opensource-src (U) qtwayland-opensource-src (U) qtwebchannel-opensource-src (U) qtwebkit-opensource-src (U)Dmitry Smirnov <onlyjob@debian.org> golang-github-containers-buildah (U) golang-github-containers-storage (U) libpod (U) python-lz4 scummvm (U)Dominic Hargreaves <dom@earth.li> perl (U)Doug Torrance <dtorrance@piedmont.edu> mpsolve (U)Dovecot Maintainers <dovecot@packages.debian.org> dovecotDr. Tobias Quathamer <toddy@debian.org> hugo (U) libopenshot (U)Drew Parsons <dparsons@debian.org> xserver-xorg-video-intel (U)Elimar Riesebieter <riesebie@lxtec.de> alsa-lib (U)Emilio Pozuelo Monfort <pochu@debian.org> cairo (U) webkit2gtk (U) weston (U)Emmanuel Bourg <ebourg@apache.org> openjfx (U)Eric Heintzmann <heintzmann.eric@free.fr> gnustep-back (U) gnustep-base (U)Ervin Hegedüs <airween@gmail.com> tlf (U)Eshat Cakar <info@eshat.de> libkdegames (U)Evangelos Ribeiro Tzaras <devrtz-debian@fortysixandtwo.eu> purple-lurch (U)Fabrice Coutadeur <coutadeurf@gmail.com> muse (U)Felix Geyer <fgeyer@debian.org> qca2 (U) qtsvg-opensource-src (U)Felix Salfelder <felix@salfelder.org> gnucap (U)Felix Zielcke <fzielcke@z-51.de> grub2 (U)Frédéric Bonnard <frediz@debian.org> libdfpGard Spreemann <gspr@nonempty.org> lbfgsbGaudenz Steinlin <gaudenz@debian.org> ceph (U)Gavin Lai (賴建宇) <gavin09@gmail.com> skypatGeorge Kiagiadakis <gkiagiad@csd.uoc.gr> libkdegames (U)George Kiagiadakis <kiagiadakis.george@gmail.com> qt-gstreamer (U)Gergely Pilisi <mail.pilisig@gmail.com> eclipse-titanGianfranco Costamagna <locutusofborg@debian.org> cpprest llvm-toolchain-11 (U) llvm-toolchain-9 (U) yaml-cpp (U)Gijs Molenaar <gijs@pythonic.nl> wsclean (U)Graham Inggs <ginggs@debian.org> julia (U)GRUB Maintainers <pkg-grub-devel@alioth-lists.debian.net> grub2Gudjon I. Gudjonsson <gudjon@gudjon.org> comedilib ngspice (U) qscintilla2 (U) qwtplot3d (U) sdcc (U)Guillem Jover <guillem@debian.org> libbsdGustavo Noronha Silva <kov@debian.org> webkit2gtk (U)Gürkan Myczko <gurkan@phys.ethz.ch> cenon.app (U) cheesecutter (U) gnustep-back (U) gnustep-base (U)Hakan Ardo <hakan@debian.org> binutils-avrhandsome_feng <jianfengli@ubuntukylin.com> ukui-interface (U)Hans-Christoph Steiner <hans@eds.org> android-platform-libnativehelper (U) android-platform-system-tools-aidl (U)Henry-Nicolas Tourneur <debian@nilux.be> purple-xmpp-carbons (U)Herbert Parentes Fortes Neto <hpfn@debian.org> libcdk5 webcamoidHideki Yamane <henrich@debian.org> chasen (U)Hsieh-Tseng Shen <woodrow.shen@gmail.com> ledmonHubert Chathi <uhoreg@debian.org> olm (U)Héctor Orón Martínez <zumbi@debian.org> weston (U)Iain Lane <laney@debian.org> evolution-data-server (U)Ian Jackson <ijackson@chiark.greenend.org.uk> adnsIan Wienand <ianw@debian.org> numactlIceyer <iceyers@gmail.com> gsettings-qt (U)intrigeri <intrigeri@debian.org> apparmor (U)IOhannes m zmölnig (Debian/GNU) <umlaeute@debian.org> gsequencer (U)Iustin Pop <iustin@debian.org> python-pylibacl python-pyxattrIvan Hu <ivan.hu@ubuntu.com> tpm2-tools (U) tpm2-tss (U)Jackson Doak <noskcaj@ubuntu.com> qqwingJaldhar H. Vyas <jaldhar@debian.org> dovecot (U)James Cowgill <jcowgill@debian.org> ffmpeg (U) python-sfml (U)James Page <jamespage@debian.org> ceph (U)Jan Wedekind <jan@wedesoft.de> aiscmJaromír Mikeš <mira.mikes@seznam.cz> zam-plugins (U)Jelmer Vernooij <jelmer@debian.org> dovecot (U)Jens Reyer <jre.winesim@gmail.com> wine (U)Jeremy Bicha <jbicha@debian.org> cairo (U) evolution-data-server (U) glib-d (U) gtk-d (U) libsigc++-2.0 (U) snapd-glib (U) tilix (U)Jeremy Bicha <jbicha@ubuntu.com> onboard (U)Jeroen Dekkers <jeroen@dekkers.ch> sope (U)Jerome Benoit <calculus@rezozer.net> igraph (U) scscp-imcce (U)Joao Eriberto Mota Filho <eriberto@debian.org> afflib (U)Jochen Sprickerhof <jspricke@debian.org> open3d (U)Johannes 'josch' Schauer <josch@debian.org> fuzzyliteJohn Horigan <john@glyphic.com> aggJon Bernard <jbernard@debian.org> ustJonas Smedegaard <dr@jones.dk> gesftpserver libsass (U) libunivalue (U) olm (U) pugixml (U) sugar-toolkit-gtk3 (U) ucommon (U)Jonathan Carter <jcc@debian.org> kpmcore (U)Jonathan McDowell <noodles@earth.li> libtorrent (U) sdcc (U)Jordi Mallach <jordi@debian.org> alsa-lib (U) grub2 (U) sope (U)Jose Luis Rivas <ghostbar@debian.org> libtorrentJosé Luis Blanco Claraco <joseluisblancoc@gmail.com> mrptJoël Krähemann <jkraehemann@gmail.com> gsequencer (U)Julian Andres Klode <jak@debian.org> apt (U) keepassxc python-apt (U)Julien Dutheil <julien.dutheil@univ-montp2.fr> libbpp-core (U) libbpp-phyl (U) libbpp-popgen (U) libbpp-qt (U) libbpp-raa (U) libbpp-seq (U) libbpp-seq-omics (U)Julián Moreno Patiño <julian@debian.org> unar (U)Jérémy Bobbio <lunar@debian.org> libmygpo-qtJörg Frings-Fürst <debian@jff.email> psocksxx xbase64Kai-Chung Yan <seamlik@debian.org> android-platform-art (U) android-platform-system-core (U)Kai-Chung Yan <seamlikok@gmail.com> android-platform-frameworks-base (U) android-platform-libnativehelper (U) android-platform-system-tools-aidl (U)Karthik <kskarthik@disroot.org> aerc (U)Katerina <ykaterina0319@gmail.com> android-platform-system-tools-hidl (U)Keith Packard <keith.packard@sifive.com> gcc-riscv64-unknown-elfKentaro Hayashi <kenhys@xdump.org> fasttext (U)Kilian Krause <kilian@debian.org> ircd-irc2 (U)Kurt Roeckx <kurt@roeckx.be> ircd-irc2Kylin Team <team+kylin@tracker.debian.org> ukui-interfaceLars Op den Kamp <lars.opdenkamp@pulse-eight.com> p8-platformLaszlo Boszormenyi (GCS) <gcs@debian.org> fuse google-perftools grpc nngLaurent Bigonville <bigon@debian.org> cairo (U) evolution-data-server (U) farstream-0.2 (U) libsemanage (U) libsepol (U) nutLifeng Sun <lifongsun@gmail.com> clhep (U)Lior Kaplan <kaplan@debian.org> php7.4 (U)Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org> phonon (U) qbs (U) qoauth (U) qt3d-opensource-src (U) qtbase-opensource-src (U) qtbase-opensource-src-gles (U) qtcharts-opensource-src (U) qtdeclarative-opensource-src (U) qtdeclarative-opensource-src-gles (U) qtlocation-opensource-src (U) qtmultimedia-opensource-src (U) qtquickcontrols2-opensource-src (U) qtscript-opensource-src (U) qtscxml-everywhere-src (U) qtsvg-opensource-src (U) qtvirtualkeyboard-opensource-src (U) qtwayland-opensource-src (U) qtwebkit-opensource-src (U)Lluis Campos <lluis.campos@northern.tech> mender-client (U)LLVM Packaging Team <pkg-llvm-team@lists.alioth.debian.org> llvm-toolchain-11 llvm-toolchain-9Lucas Kanashiro <kanashiro@debian.org> libcryptx-perl (U)Ludovic Brenta <lbrenta@debian.org> libgtkadaLudovic Drolez <ldrolez@debian.org> swish-eLuigi Gangitano <luigi@debian.org> libecapLuke Yelavich <themuso@ubuntu.com> alsa-lib (U)LXQt Packaging Team <pkg-lxqt-devel@lists.alioth.debian.org> libfm-qt liblxqt libqtxdgMaarten L. Hekkelman <maarten@hekkelman.com> libcifpp (U)Magnus Holmgren <holmgren@debian.org> adns (U) pike8.0Maintainers of Mozilla-related packages <team+pkg-mozilla@tracker.debian.org> firefox-esrMarc Fournier <marc@bl.uem.li> collectd (U)Marco d'Itri <md@linux.it> libxcryptMario Limonciello <mario.limonciello@dell.com> efivar (U)Mario Limonciello <superm1@gmail.com> tpm2-tss (U)Mark Brown <broonie@debian.org> tuaMark Heily <mark@heily.com> libblocksruntimeMark Purcell <msp@debian.org> dahdi-tools (U) exiv2 (U) ktp-common-internals (U)Markus Koschany <apo@debian.org> binaryenMateusz Łukasik <mati75@linuxmint.pl> audacious (U)Mathieu Trudel-Lapierre <cyphermox@ubuntu.com> tpm2-tools (U) tpm2-tssMatrix Packaging Team <pkg-matrix-maintainers@lists.alioth.debian.org> olmMatt Kraai <kraai@debian.org> unarMatteo F. Vescovi <mfv@debian.org> libraw (U)Matthias Klose <doko@debian.org> autofdo (U) mpdecimalMatthias Klose <doko@ubuntu.com> libdfp (U) openjdk-11 (U) openjdk-17 (U)Matthias Klumpp <mak@debian.org> appstream-generator dcontainers (U) gir-to-d (U) glib-d (U) gtk-d (U) mir-core (U) mustache-d (U) stdx-allocator (U) tilix (U)maximilian attems <maks@debian.org> linux (U) xserver-xorg-video-intel (U)Maximiliano Curia <maxy@debian.org> exiv2 (U) flatbuffers grantlee5 (U) indi (U) kactivities-kf5 (U) karchive (U) kbookmarks (U) kconfig (U) kdeclarative (U) kdelibs4support (U) kfilemetadata-kf5 (U) khtml (U) kiconthemes (U) kio (U) kjs (U) kjsembed (U) knewstuff (U) kross (U) ktexteditor (U) kwallet-kf5 (U) kwayland (U) libaccounts-qt (U) libkdegames (U) marble (U) phonon (U) plasma-framework (U) polkit-qt-1 (U) qca2 (U) syndication (U) telepathy-logger-qt (U) threadweaver (U)Mehdi Dogguy <mehdi@debian.org> infinipath-psm (U)Michael Banck <mbanck@debian.org> indigo (U) openmolcas (U) pymol (U) rdkit (U)Michael Biebl <biebl@debian.org> libsigc++-2.0 (U) lksctp-tools network-manager (U)Michael Gilbert <mgilbert@debian.org> chromium (U) wine (U)Michael Hudson-Doyle <mwhudson@debian.org> liblinear (U) libsvm (U) notary (U)Michael Jeanson <mjeanson@debian.org> ust (U)Michael R. Crusoe <crusoe@debian.org> libssw (U) vg (U)Michael R. Crusoe <michael.crusoe@gmail.com> spades (U)Michael Stapelberg <stapelberg@debian.org> xserver-xorg-video-intel (U)Michael Tautschnig <mt@debian.org> binutils-h8300-hms diagnosticsMichael Vogt <mvo@debian.org> apt (U) python-apt (U)Michal Arbet <michal.arbet@ultimum.io> prometheus-libvirt-exporter (U)Michał Zając <quintasan@kubuntu.org> ktp-common-internals (U) telepathy-logger-qt (U) telepathy-qt (U)Michel Le Bihan <michel@lebihan.pl> chromium (U)Miguel A. Colón Vélez <debian.micove@gmail.com> mplayer (U)Mika Pflüger <debian@mikapflueger.de> bornagain (U)Mike Gabriel <sunweaver@debian.org> gsettings-qt (U) libpam-freerdp2 (U) libpam-x2go (U) lomiri-app-launch (U) lomiri-download-manager (U) mir (U) net-cpp (U) onboard (U) process-cpp (U) qtmir (U) qtpim-opensource-src (U) snapd-glib (U) weston (U)Mike Hommey <glandium@debian.org> firefox-esr (U)Mo Zhou <lumin@debian.org> blis (U) double-conversion (U) highwayhash (U) julia (U) onednn (U) openblas (U) simdjson tbb (U)Modestas Vainius <modax@debian.org> libkdegames (U) libktorrent (U) phonon (U) polkit-qt-1 (U)Moritz Muehlenhoff <jmm@debian.org> scummvm (U)Muammar El Khatib <muammar@debian.org> sillyNadiya Sitdykova <rovenskasa@gmail.com> gatb-core (U)Nick Black <dankamongmen@gmail.com> notcursesNico Schlömer <nico.schloemer@gmail.com> blis (U)Nicolas Boulenguez <nicolas@debian.org> libgtkada (U)Nicolas Dandrimont <olasd@debian.org> beancount (U) python-cmarkgfm (U)Niko Tyni <ntyni@debian.org> perlNilesh Patra <npatra974@gmail.com> libatomic-queue (U)Noah Meyerhans <noahm@debian.org> dovecot (U) qoauth tcptraceNobuhiro Iwamatsu <iwamatsu@debian.org> bluez (U) flatbuffers (U) go-cve-dictionary (U) go-exploitdb (U) gost (U) goval-dictionary (U) swupdate (U)NOKUBI Takatsugu <knok@daionet.gr.jp> chasen (U)Norbert Preining <norbert@preining.info> cantor (U) julia (U) kactivities-kf5 (U) karchive (U) kbookmarks (U) kconfig (U) kdeclarative (U) kdelibs4support (U) kfilemetadata-kf5 (U) khtml (U) kiconthemes (U) kio (U) kjs (U) kjsembed (U) knewstuff (U) kross (U) kscreenlocker (U) ktexteditor (U) kwallet-kf5 (U) kwayland (U) libksysguard (U) plasma-framework (U) plasma-workspace (U) syndication (U) threadweaver (U)Ola Lundqvist <opal@debian.org> gngb (U)Ole Streicher <olebole@debian.org> eso-midas (U) wsclean (U)Olek Wojnar <olek@debian.org> bazel-bootstrap (U)Olek Wojnar <olekw.dev@gmail.com> skstream (U)Ondřej Surý <ondrej@debian.org> libreswan (U) libyang (U) php7.4 (U) softhsm2 (U)OpenJDK Team <openjdk-11@packages.debian.org> openjdk-11OpenJDK Team <openjdk-17@packages.debian.org> openjdk-17Paride Legovini <paride@debian.org> fscrypt (U)Patrick Franz <patfra71@gmail.com> kscreenlocker (U) libksysguard (U) plasma-workspace (U) qtcharts-opensource-src (U) qtvirtualkeyboard-opensource-src (U) qtwayland-opensource-src (U)Paul Klos <kolab@klos2day.nl> libkolabxml (U)Paul Wouters <paul@libreswan.org> libreswan (U)Paulo Henrique de Lima Santana (phls) <phls@debian.org> kickpassPeter Colberg <peter@colberg.org> acmetool (U) julia (U) ucommon (U)Peter Van Eynde <pvaneynd@debian.org> libsigsegv (U) sbcl (U)Philip Rinn <rinni@inventati.org> gtkspellmmPierre Chifflier <pollux@debian.org> libprelude libpreludedb prelude-lml prelude-managerPierre Saramito <pierre.saramito@imag.fr> rheolef (U)Pino Toscano <pino@debian.org> grantlee5 (U) indi (U) kdb (U) kdiagram (U) kproperty (U) kreport (U) libkcddb (U) libkf5kexiv2 (U) qt3d-opensource-src (U) qtbase-opensource-src (U) qtbase-opensource-src-gles (U) qtdeclarative-opensource-src (U) qtdeclarative-opensource-src-gles (U) qtmultimedia-opensource-src (U) qtquickcontrols2-opensource-src (U) qtscript-opensource-src (U) qtsvg-opensource-src (U) qtwayland-opensource-src (U)Pirate Praveen <praveen@debian.org> golang-github-rubenv-sql-migrate (U)qinxialei <xialeiqin@gmail.com> generate-ninjaRaphaël Hertzog <raphael@offensive-security.com> aflplusplus (U) vboot-utils (U)Reiner Herrmann <reiner@reiner-h.de> muslReinhard Tartler <siretart@tauware.de> ffmpeg (U) golang-github-containers-buildah (U) golang-github-containers-storage (U) libpod (U) libva (U) mplayer (U) skopeo (U)Rene Engelhard <rene@debian.org> libreoffice (U)Ricardo Ribalda Delgado <ricardo@ribalda.com> generate-ninja (U)Riku Voipio <riku.voipio@linaro.org> chromium (U)Rob Browning <rlb@defaultvalue.org> emacsRobbie Harwood (frozencemetery) <rharwood@club.cc.cmu.edu> python-gssapiRobert Ancell <robert.ancell@canonical.com> snapd-glib (U)Robert Edmonds <edmonds@debian.org> protobuf-cRoberto Lumbreras <rover@debian.org> proxy-suiteRoland Fehrenbacher <rf@q-leap.de> infinipath-psm (U)Roman Tsisyk <roman@tarantool.org> tarantoolRuben Undheim <ruben.undheim@gmail.com> openbsc (U) osmo-bsc (U) osmo-msc (U) osmo-pcu (U) osmo-sgsn (U) yosys (U)Russell co*ker <russell@co*ker.com.au> libsemanage (U) libsepol (U)Salvatore Bonaccorso <carnil@debian.org> linux (U)Sam Hocevar (Debian packages) <sam+deb@zoy.org> mpeg2dec (U)Sandro Knauß <hefee@debian.org> cmocka (U) libkolabxml (U) qtwebchannel-opensource-src (U)Santiago Ruano Rincón <santiago@debian.org> sugar-toolkit-gtk3 (U)Sascha Steinbiss <satta@debian.org> golang-github-pzhin-go-sophia (U) libssw (U) libtabixpp (U) spades (U)Scarlett Moore <sgmoore@kde.org> kscreenlocker (U) libksysguard (U) plasma-workspace (U) qtscxml-everywhere-src (U) qtspell (U) qtwebchannel-opensource-src (U) signond (U)Sebastian Dröge <slomo@debian.org> pitiviSebastian Harl <tokkee@debian.org> collectd (U)Sebastian Kuzminsky <seb@highlab.com> yosys (U)Sebastian Ramacher <sramacher@debian.org> libva (U)Sebastian Reichel <sre@debian.org> nesccSebastien Delafond <seb@debian.org> bornagain (U)Sebastien Jodogne <s.jodogne@gmail.com> civetweb (U)Shaun Jackman <sjackman@debian.org> jellyfish1 (U)Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com> gcin (U) libfm-qt (U)Simon Quigley <tsimonq2@debian.org> mir (U) qbs (U) qt3d-opensource-src (U) qtbase-opensource-src (U) qtbase-opensource-src-gles (U) qtcharts-opensource-src (U) qtdeclarative-opensource-src (U) qtdeclarative-opensource-src-gles (U) qtlocation-opensource-src (U) qtmultimedia-opensource-src (U) qtquickcontrols2-opensource-src (U) qtscript-opensource-src (U) qtsvg-opensource-src (U) qtvirtualkeyboard-opensource-src (U) qtwayland-opensource-src (U) qtwebchannel-opensource-src (U) qtwebkit-opensource-src (U) yaml-cppSjoerd Simons <sjoerd@debian.org> farstream-0.2 (U) network-manager (U)Sophie Brun <sophie@offensive-security.com> aflplusplus (U) vboot-utilsStefan Ahlers <stef.ahlers@t-online.de> liblastfm libquazip (U)Stefano Babic <sbabic@denx.de> swupdateStefano Zacchiroli <zack@debian.org> beancount (U)Steffen Moeller <moeller@debian.org> lagan (U) libatomic-queue (U)Stephen Kitt <skitt@debian.org> g810-led gcc-mingw-w64 gdb-mingw-w64 libxmp mingw-w64 scummvm (U) wine (U)Steve Capper <steven.capper@gmail.com> tbb (U)Steve M. Robbins <smr@debian.org> exiv2 (U)Steve McIntyre <93sam@debian.org> efivar (U) grub2 (U) pesign (U)Sudip Mukherjee <sudipm.mukherjee@gmail.com> libbpf trace-cmdSune Vuorela <debian@pusling.com> qt3d-opensource-src (U) qtdeclarative-opensource-src (U) qtdeclarative-opensource-src-gles (U) qtmultimedia-opensource-src (U) qtquickcontrols2-opensource-src (U) qtscript-opensource-src (U) qtsvg-opensource-src (U) qtwayland-opensource-src (U)Sune Vuorela <sune@debian.org> cantor (U) grantlee5 (U) libkcddb (U) libkdegames (U) libkf5kexiv2 (U) marble (U) okteta (U) qtbase-opensource-src (U) qtbase-opensource-src-gles (U)Sylvestre Ledru <sylvestre@debian.org> llvm-toolchain-11 (U) llvm-toolchain-9 (U)SZ Lin (林上智) <szlin@debian.org> libgpiod skypat (U) swupdate (U) tpm2-abrmd tpm2-pkcs11 (U)Sébastien Villemot <sebastien@debian.org> libsigsegv (U) openblas (U) sbcl (U)Thomas Andrejak <thomas.andrejak@gmail.com> libprelude (U) libpreludedb (U) prelude-lml (U) prelude-manager (U)Thomas Goirand <zigo@debian.org> ceph (U)Thomas Krennwallner <tkren@kr.tuwien.ac.at> gringo (U)Thomas Pierson <contact@thomaspierson.fr> kdsoap libmygpo-qt (U)Thorsten Alteholz <debian@alteholz.de> dmarc-cat (U) openbsc (U) osmo-bsc (U) osmo-fl2k (U) osmo-msc (U) osmo-pcu (U) osmo-sgsn (U)Thorsten Glaser <tg@mirbsd.de> dietlibc (U)Tianon Gravi <tianon@debian.org> notary (U)Tim Potter <tpot@hpe.com> golang-github-cloudflare-cfssl (U)Timo Aaltonen <tjaalton@debian.org> intel-compute-runtime (U) intel-graphics-compiler (U) libwacom python-gssapi (U)Timo Jyrinki <timo@debian.org> qt3d-opensource-src (U) qtbase-opensource-src (U) qtbase-opensource-src-gles (U) qtdeclarative-opensource-src (U) qtdeclarative-opensource-src-gles (U) qtlocation-opensource-src (U) qtmultimedia-opensource-src (U) qtpim-opensource-src (U) qtquickcontrols2-opensource-src (U) qtscript-opensource-src (U) qtsvg-opensource-src (U) qtwayland-opensource-src (U) qtwebkit-opensource-src (U)Timo Röhling <timo@gaussglocke.de> draco fastdds open3d (U) qhull (U)Tobias Frost <tobi@debian.org> log4cxxTorsten Marek <shlomme@debian.org> qscintilla2 (U)TSUCHIYA Masatoshi <tsuchiya@imc.tut.ac.jp> fasttext (U)Tu Qinggang <tuqinggang@uniontech.com> dtkcore (U)Tzafrir Cohen <tzafrir@debian.org> dahdi-tools (U)Uditha Atukorala <ua@nuked.zone> psocksxx (U)Umang Parmar <umangjparmar@gmail.com> android-platform-frameworks-base (U) android-platform-system-core (U)Utopia Maintenance Team <pkg-utopia-maintainers@lists.alioth.debian.org> network-managerVangelis Mouhtsis <vangelis@gnugr.org> onboard (U)Vasudev Kamath <vasudev@copyninja.info> pugixmlVincent Cheng <vcheng@debian.org> xserver-xorg-video-intel (U)Vincent Danjean <vdanjean@debian.org> papi (U) pocl (U)Yangfl <mmyangfl@gmail.com> dtkwm (U) effcee libsimpleini litehtml qr-code-generatorYanhao Mo <yanhaocs@gmail.com> dtkcore (U) dtkwm (U) gsettings-qt (U) qtmpris (U)Yao Wei (魏銘廷) <mwei@lxde.org> gcin (U)Yavor Doganov <yavor@gnu.org> adun.app (U) cenon.app (U) gnustep-back (U) gnustep-base (U)Ying-Chun Liu (PaulLiu) <paulliu@debian.org> tpm2-abrmd (U) tpm2-tools tpm2-tss (U)YunQiang Su <syq@debian.org> fcitx-qt5 (U)YunQiang Su <wzssyqa@gmail.com> libgooglepinyin (U) tclcl (U)أحمد المحمودي (Ahmed El-Mahmoudy) <aelmahmoudy@sabily.org> gnucap (U)أحمد المحمودي (Ahmed El-Mahmoudy) <aelmahmoudy@users.sourceforge.net> elinks systemc
ToolChain/LTO - Debian Wiki (2024)

FAQs

What is LTO Linux? ›

What is Link Time Optimization (LTO) Link Time Optimization is a form of interprocedural optimization that is performed at the time of linking application code. Without LTO, Arm® Compiler for Linux compiles and optimizes each source file independently of one another, then links them to form the executable.

What is the use of LTO in GCC? ›

Link Time Optimization, or LTO, is a GCC-compatible feature that allows the compiler to retain its internal representation of a program or module and use it later with different compilation units to perform optimizations during linking.

What is LTO build? ›

Link-time optimization (LTO) is a whole-program optimization technique that can improve runtime speed by 10-20% or more, and also reduce binary size, at the cost of worse compile times. It comes in several forms.

How does LTO work? ›

LTO Ultrium tape is laid out with four wide data bands sandwiched between five narrow servo bands. The tape head assembly, that reads from and writes to the tape, straddles a single data band and the two adjacent servo bands. The tape head has 8, 16, or 32 data read/write head elements and 2 servo read elements.

What is LLVM LTO? ›

LLVM LTO optimizes all the LLVM modules as a single unit. This allows for whole program optimization (potentially crossing language boundaries and Swift module boundaries).

Why is LTO still used? ›

Tape doesn't have the fast access speeds of HDDs or SSDs for retrieval. It is linear by nature and that is both its strength (allows for capacity) and its weakness (slower to access). But speed is not a deal breaker. We mostly use LTO for archive content that doesn't require instant or frequent access.

What is LTO used for? ›

Linear Tape-Open (LTO) is an open-format tape storage technology created by HPE, IBM and Seagate Technology. Open-format storage gives users access to multiple sources of storage media products that are compatible.

What is the benefit of LTO in GCC? ›

Link Time Optimization (LTO) gives GCC the capability of dumping its internal representation (GIMPLE) to disk, so that all the different compilation units that make up a single executable can be optimized as a single module.

What is LTO platform? ›

LTO Network is a hybrid blockchain application development platform for securing, verifying, and exchanging enterprise information. That's not unusual, as there are many such platforms and applications around today; however, LTO Network stands apart.

Is LTO worth it? ›

Benefits of LTO for video editing.

LTO tapes can last for 30 years or more, depending on the storage conditions, and require minimal maintenance. Unlike hard drives or SSDs, LTO tapes are unaffected by magnetic fields, mechanical damage, or electrical surges.

What is LTO on a menu? ›

LTO, or limited time offer, is a menu item or set of items that are only available for a limited period of time. For example, the many happy hour ideas used in the restaurant and bar industry are common examples of LTO. They create a limited-time promotion that incentivizes customers to order particular drinks.

What is Red Hat Enterprise Linux used for? ›

Today, Red Hat Enterprise Linux supports and powers software and technologies for automation, cloud, containers, middleware, storage, application development, microservices, virtualization, management, and more. Linux plays a major role as the core of many of Red Hat's offerings.

What is lto1? ›

lto1 is a lto compiler just like cc1 is a C compiler and cc1plus is a C++ compiler. GCC has different front-ends, that is code which reads / interprets one input language and provides the generated internal representation to the middle-end (language- and target-independent passes). lto front-end is one of them.

What type of license does Linux use? ›

Linux is licensed with the GNU General Public License (GPL), a document devised for the GNU project by the Free Software Foundation. The GPL allows anybody to redistribute, and even sell, a product covered by the GPL, as long as the recipient is allowed to rebuild an exact copy of the binary files from source.

What is driver registration in Linux? ›

Device driver registration

driver_register() is the low-level function used to register a device driver with the bus. It adds the driver to the bus's list of drivers.

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