🌐
LLVM
llvm.org › docs › GettingStarted.html
Getting Started with the LLVM System — LLVM 23.0.0git documentation
The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
🌐
GitHub
github.com › llvm › llvm-project
GitHub - llvm/llvm-project: The LLVM Project is a collection of modular and reusable compiler and toolchain technologies. · GitHub
1 week ago - This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
Starred by 39.1K users
Forked by 17.7K users
Languages   LLVM 41.1% | C++ 30.3% | C 12.4% | Assembly 11.5% | MLIR 1.6% | Python 0.9%
People also ask

What is the difference between LLVM and Clang?
LLVM is the infrastructure, while Clang is the frontend compiler that uses LLVM.
🌐
compilersutra.com
compilersutra.com › llvm explained: architecture, ir, and clang
LLVM Explained: Architecture, IR, and Clang | CompilerSutra
What is LLVM?
LLVM is a modular compiler infrastructure with a reusable IR, optimizer pipeline, backend framework, and broad tooling ecosystem.
🌐
compilersutra.com
compilersutra.com › llvm explained: architecture, ir, and clang
LLVM Explained: Architecture, IR, and Clang | CompilerSutra
Why is LLVM important?
LLVM made reusable compiler engineering much easier for language designers, systems programmers, and tool builders.
🌐
compilersutra.com
compilersutra.com › llvm explained: architecture, ir, and clang
LLVM Explained: Architecture, IR, and Clang | CompilerSutra
🌐
Gentoo Wiki
wiki.gentoo.org › wiki › LLVM › Clang
LLVM/Clang - Gentoo wiki
LLVM profiles, experimental information, etc.) please refer to LLVM. Clang is a C/C++/Objective-C/C++, CUDA, and RenderScript language front-end for the LLVM project with a focus on standards, code correctness, and useful diagnostic messages to ease compile time troubleshooting.
🌐
Apple Open Source
opensource.apple.com › projects › llvm-clang
LLVM / Clang
These libraries are built around ... language (or port an existing compiler) to use LLVM as an optimizer and code generator. Clang is an "LLVM native" C/C++/Objective-C compiler, which aims to deliver amazingly fast compiles, extremely useful error and warning messages and to ...
🌐
Gentoo
packages.gentoo.org › packages › llvm-core › clang
llvm-core/clang – Gentoo Packages
The goal of the Clang project is to create a new C, C++, Objective C and Objective C++ front-end for the LLVM compiler.
🌐
Gentoo Wiki
wiki.gentoo.org › wiki › LLVM
LLVM - Gentoo wiki
Then install Clang, LLVM, compiler-rt, llvm-runtimes/libunwind, and lld with the default GCC environment: root #emerge llvm-core/clang llvm-core/llvm llvm-runtimes/compiler-rt llvm-runtimes/libunwind llvm-core/lld
🌐
Clang
clang.llvm.org
Clang C Language Family Frontend for LLVM
The Clang project provides a language front-end and tooling infrastructure for languages in the C language family (C, C++, Objective C/C++, OpenCL, and CUDA) for the LLVM project. Both a GCC-compatible compiler driver (clang) and an MSVC-compatible compiler driver (clang-cl.exe) are provided.
Find elsewhere
🌐
CompilerSutra
compilersutra.com › llvm explained: architecture, ir, and clang
LLVM Explained: Architecture, IR, and Clang | CompilerSutra
LLVM Core: Handles intermediate representation, optimization, and code generation. Clang: The LLVM front-end for C, C++, and Objective-C.
🌐
Clang
clang.llvm.org › get_started.html
Getting Started: Building and Running Clang - LLVM
In addition to source code control, the GNU core utilities in the package are used by the tests. CMake. This is used for generating Visual Studio solution and project files. Get it from: https://cmake.org/download/ Visual Studio 2019 16.7 or later. This tutorial assumes Visual Studio 2022. Python. It is used to run the clang ...
🌐
LLVM
llvm.org
The LLVM Compiler Infrastructure Project
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies. Despite its name, LLVM has little to do with traditional virtual machines. The name "LLVM" itself is not an acronym; it is the full name of the project · LLVM began as a research project at the University ...
🌐
AMD ROCm
rocm.docs.amd.com › projects › llvm-project › en › latest › LLVM › llvm › html › GettingStarted.html
Getting Started with the LLVM System — LLVM 22.0.0git documentation
The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
🌐
Reddit
reddit.com › r/gentoo › llvm-core/clang-19.1.7 fails to emerge
r/Gentoo on Reddit: llvm-core/clang-19.1.7 fails to emerge
February 18, 2025 -

Hi all,

I'm attempting to update my laptop but for some reason llvm-core/clang fails to compile. The other LLVM packages compiled and installed fine.

I did emerge sync just now to ensure that this isn't something that was just fixed, but the build continues to fail.

Has anyone had this issue recently? I'm not sure if it's a bug or just an issue with my configuration.

The output of the support command it asked me to run is below. Below that, is the final lines of the build log.

Thanks,

Daniel

=================================================================
                        System Settings
=================================================================
System uname: Linux-6.6.67-gentoo-x86_64-13th_Gen_Intel-R-_Core-TM-_i9-13900HX-with-glibc2.40
KiB Mem:    32548788 total,  29124436 free
KiB Swap:          0 total,         0 free
Timestamp of repository gentoo: Tue, 18 Feb 2025 12:30:00 +0000
Head commit of repository gentoo: 7818b6f9ac4e673295edba555cfa93e647337bf1
Timestamp of repository steam-overlay: Mon, 17 Feb 2025 22:03:39 +0000
Head commit of repository steam-overlay: e2a98a7193b53e8b8c48d049fa07fafca57d45c3

sh bash 5.2_p37
ld GNU ld (Gentoo 2.43 p3) 2.43.1
app-misc/pax-utils:        1.3.8::gentoo
app-shells/bash:           5.2_p37::gentoo
dev-build/autoconf:        2.72-r1::gentoo
dev-build/automake:        1.16.5-r2::gentoo
dev-build/cmake:           3.30.6::gentoo
dev-build/libtool:         2.5.4::gentoo
dev-build/make:            4.4.1-r100::gentoo
dev-build/meson:           1.6.1::gentoo
dev-java/java-config:      2.3.4::gentoo
dev-lang/perl:             5.40.0-r1::gentoo
dev-lang/python:           3.12.8_p1::gentoo, 3.13.1_p1::gentoo
dev-lang/rust-bin:         1.83.0-r1::gentoo
llvm-core/clang:           18.1.8-r6::gentoo, 19.1.4::gentoo
llvm-core/llvm:            18.1.8-r6::gentoo, 19.1.7::gentoo
sys-apps/baselayout:       2.17::gentoo
sys-apps/openrc:           0.55.1::gentoo
sys-apps/sandbox:          2.39::gentoo
sys-devel/binutils:        2.43-r2::gentoo
sys-devel/binutils-config: 5.5.2::gentoo
sys-devel/gcc:             14.2.1_p20241221::gentoo
sys-devel/gcc-config:      2.12.1::gentoo
sys-kernel/linux-headers:  6.6-r1::gentoo (virtual/os-headers)
sys-libs/glibc:            2.40-r8::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-max-age: 3
   sync-rsync-verify-jobs: 1
   sync-rsync-extra-opts:  
   sync-rsync-verify-metamanifest: yes

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

Binary Repositories:

gentoobinhost
   priority: 1
   sync-uri: https://distfiles.gentoo.org/releases/amd64/binpackages/23.0/x86-64

ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/sandbox.d"
CXXFLAGS="-O2 -pipe"
DISTDIR="/var/cache/distfiles"
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"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg-live config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync merge-wait multilib-strict network-sandbox new
s parallel-fetch pid-sandbox pkgdir-index-trusted preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="C.UTF8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,-z,pack-relative-relocs"
LEX="flex"
MAKEOPTS="-j32 -l32"
PKGDIR="/var/cache/binpkgs"
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"
SHELL="/bin/bash"
USE="X a52 aac acl acpi activities alsa amd64 bluetooth branding bzip2 cairo cdda cdr cet crypt cups dbus declarative dracut dri dts dvd dvdr elogind encode exif flac gdbm gif gpm gtk gui iconv icu ipv6 jpeg kde kf6compat kwallet lcms l
ibnotify libtirpc mad mng mp3 mp4 mpeg multilib ncurses networkmanager nls ogg opengl openmp pam pango pcre pdf pipewire plasma png policykit ppds pulseaudio qml qt5 qt6 readline screencast sdl seccomp semantic-desktop sound spell ssl s
tartup-notification svg test-rust tiff truetype udev udisks unicode upower usb vorbis vulkan wayland widgets wxwidgets x264 xattr xcb xephyr xft xml xv xvid zlib" ABI_X86="64" ADA_TARGET="gcc_13" APACHE2_MODULES="authn_core authz_core s
ocache_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 he
aders 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 f16c fma3 mmx mmxext pclmul popcnt rdrand sha sse sse2 sse3 sse4_1 sse4_2 ssse3 vpclmulqdq" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync i
trax navcom oceanserver oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 tsip tripmate tnt ublox" GUILE_SINGLE_TARGET="3-0" GUILE_TARGETS="3-0" INPUT_DEVICES="libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz glk hd44780 lb216 lcdm0
01 mtxorb text" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php8-2" POSTGRES_TARGETS="postgres16" PYTHON_SINGLE_TARGET="python3_12" PYTHON_TARGETS="python3_12" RUBY_TARGETS="ruby32" V
IDEO_CARDS="intel i915 iris nvidia" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipp2p iface geoip fuzzy condition tarpit sysrq proto logmark ipmark dhcpmac delude chaos account"
Unset:  ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EMERGE_DEFAULT_OPTS, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, INSTALL_MASK, LC_ALL, LD, LFLAGS, LIBTOOL, LINGUAS, MAKE, M
AKEFLAGS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PYTHONPATH, RANLIB, READELF, RUSTFLAGS, SIZE, STRINGS, STRIP, YACC, YFLAGS


/var/tmp/portage/llvm-core/clang-19.1.7/work/clang/lib/CodeGen/CGBuiltin.cpp:18751:19: note: ‘IID’ was declared here
18751 |     Intrinsic::ID IID;
     |                   ^~~
/var/tmp/portage/llvm-core/clang-19.1.7/work/clang/lib/CodeGen/CGBuiltin.cpp:19251:32: warning: ‘BinOp’ may be used uninitialized [-Wmaybe-uninitialized]
19251 |         Builder.CreateAtomicRMW(BinOp, Ptr, Val, AO, SSID);
     |         ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
/var/tmp/portage/llvm-core/clang-19.1.7/work/clang/lib/CodeGen/CGBuiltin.cpp:19189:32: note: ‘BinOp’ was declared here
19189 |     llvm::AtomicRMWInst::BinOp BinOp;
     |                                ^~~~~
In file included from /var/tmp/portage/llvm-core/clang-19.1.7/work/clang/lib/CodeGen/CGBuilder.h:13:
In static member function ‘static clang::CodeGen::RValue clang::CodeGen::RValue::get(llvm::Value*)’,
   inlined from ‘clang::CodeGen::RValue clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(clang::GlobalDecl, unsigned int, const clang::CallExpr*, clang::CodeGen::ReturnValueSlot)’ at /var/tmp/portage/llvm-core/clang-19.1.7/work/clang/l
ib/CodeGen/CGBuiltin.cpp:3143:23:
/var/tmp/portage/llvm-core/clang-19.1.7/work/clang/lib/CodeGen/CGValue.h:100:19: warning: ‘Result’ may be used uninitialized [-Wmaybe-uninitialized]
 100 |     ER.Vals.first = V;
     |     ~~~~~~~~~~~~~~^~~
/var/tmp/portage/llvm-core/clang-19.1.7/work/clang/lib/CodeGen/CGBuiltin.cpp: In member function ‘clang::CodeGen::RValue clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(clang::GlobalDecl, unsigned int, const clang::CallExpr*, clang::Co
deGen::ReturnValueSlot)’:
/var/tmp/portage/llvm-core/clang-19.1.7/work/clang/lib/CodeGen/CGBuiltin.cpp:3127:12: note: ‘Result’ was declared here
3127 |     Value *Result;
     |            ^~~~~~
ninja: build stopped: subcommand failed.
* ERROR: llvm-core/clang-19.1.7::gentoo failed (compile phase):
*   ninja -v -j32 -l32 distribution failed
*  
* Call stack:
*     ebuild.sh, line  136:  Called src_compile
*   environment, line 3939:  Called multilib-minimal_src_compile
*   environment, line 2745:  Called multilib_foreach_abi 'multilib-minimal_abi_src_compile'
*   environment, line 3012:  Called multibuild_foreach_variant '_multilib_multibuild_wrapper' 'multilib-minimal_abi_src_compile'
*   environment, line 2705:  Called _multibuild_run '_multilib_multibuild_wrapper' 'multilib-minimal_abi_src_compile'
*   environment, line 2703:  Called _multilib_multibuild_wrapper 'multilib-minimal_abi_src_compile'
*   environment, line  555:  Called multilib-minimal_abi_src_compile
*   environment, line 2739:  Called multilib_src_compile
*   environment, line 3232:  Called cmake_build 'distribution'
*   environment, line 1358:  Called eninja 'distribution'
*   environment, line 1840:  Called die
* The specific snippet of code:
*       "$@" || die -n "${*} failed"
*  
* If you need support, post the output of `emerge --info '=llvm-core/clang-19.1.7::gentoo'`,
* the complete build log and the output of `emerge -pqv '=llvm-core/clang-19.1.7::gentoo'`.
* The complete build log is located at '/var/tmp/portage/llvm-core/clang-19.1.7/temp/build.log'.
* The ebuild environment file is located at '/var/tmp/portage/llvm-core/clang-19.1.7/temp/environment'.
* Working directory: '/var/tmp/portage/llvm-core/clang-19.1.7/work/x/y/clang-abi_x86_64.amd64'
* S: '/var/tmp/portage/llvm-core/clang-19.1.7/work/clang'
🌐
Linux From Scratch
linuxfromscratch.org › blfs › view › svn › general › llvm.html
LLVM-22.1.8
The Low Level Virtual Machine (LLVM) ... representation known as the LLVM intermediate representation ("LLVM IR"). Clang provides new C, C++, Objective C and Objective C++ front-ends for LLVM and is required by some desktop packages such as firefox and for rust if that is built ...
🌐
LLVM
llvm.org › doxygen › group__LLVMCCore.html
LLVM: Core
Definition at line 88 of file Core.cpp. Return the major, minor, and patch version of LLVM.
🌐
GitHub
github.com › ycm-core › llvm › releases
Releases · ycm-core/llvm
LLVM and Clang 18.1.1 without realtime, terminfo, and zlib dependencies.
Author   ycm-core
🌐
Arm Developer
developer.arm.com › documentation › 107976 › 22-1-0 › Clang-core-tools › clang-check--LLVM-core-tool-
clang-check (LLVM core tool)
March 31, 2026 - clang-check is a fast command-line tool that runs clang basic syntax and semantic diagnostics over specific source files.
🌐
Red Hat
developers.redhat.com › products › gcc-clang-llvm-go-rust › overview
Compilers: Clang/LLVM, Go, Rust | Red Hat Developer
March 19, 2025 - Clang is an “LLVM native” C/C++/Objective-C compiler, which aims to deliver amazingly fast compiles, extremely useful error and warning messages and to provide a platform for building great source level tools.
🌐
Clang
clang.llvm.org › docs › ClangTools.html
Overview — Clang 23.0.0git documentation
Regardless of which repository ... The core set of Clang tools that are within the main repository are tools that very specifically complement, and allow use and testing of Clang specific functionality....