guix/gnu/packages/llvm.scm

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2016, 2018 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2015, 2017, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2016 Dennis Mungai <dmngaie@gmail.com>
;;; Copyright © 2016, 2018, 2019, 2020, 2021 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2017 Roel Janssen <roel@gnu.org>
;;; Copyright © 2018, 2019, 2020 Marius Bakke <mbakke@fastmail.com>
;;; Copyright © 2018, 2019 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2018, 2021 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2018 Tim Gesthuizen <tim.gesthuizen@yahoo.de>
;;; Copyright © 2018 Pierre Neidhardt <mail@ambrevar.xyz>
;;; Copyright © 2019 Rutger Helling <rhelling@mykolab.com>
;;; Copyright © 2019 Arm Ltd <David.Truby@arm.com>
;;; Copyright © 2019 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2019 Brett Gilio <brettg@gnu.org>
;;; Copyright © 2020 Giacomo Leidi <goodoldpaul@autistici.org>
;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net>
;;; Copyright © 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;; Copyright © 2021 Maxime Devos <maximedevos@telenet.be>
;;; Copyright © 2021 Julien Lepiller <julien@lepiller.eu>
;;; Copyright © 2021 Lars-Dominik Braun <lars@6xq.net>
;;; Copyright © 2021 Guillaume Le Vaillant <glv@posteo.net>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages llvm)
  #:use-module (guix packages)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix download)
  #:use-module (guix gexp)
  #:use-module (guix git-download)
  #:use-module (guix memoization)
  #:use-module (guix utils)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system cmake)
  #:use-module (guix build-system emacs)
  #:use-module (guix build-system python)
  #:use-module (guix build-system trivial)
  #:use-module (gnu packages)
  #:use-module (gnu packages base)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages bootstrap)           ;glibc-dynamic-linker
  #:use-module (gnu packages compression)
  #:use-module (gnu packages libedit)
  #:use-module (gnu packages libffi)
  #:use-module (gnu packages lua)
  #:use-module (gnu packages mpi)
  #:use-module (gnu packages ncurses)
  #:use-module (gnu packages ocaml)
  #:use-module (gnu packages onc-rpc)
  #:use-module (gnu packages perl)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages python)
  #:use-module (gnu packages swig)
  #:use-module (gnu packages xml)
  #:export (system->llvm-target))

(define* (system->llvm-target #:optional
                              (system (or (and=> (%current-target-system)
                                                 gnu-triplet->nix-system)
                                          (%current-system))))
  "Return the LLVM target name that corresponds to SYSTEM, a system type such
as \"x86_64-linux\"."
  ;; See the 'lib/Target' directory of LLVM for a list of supported targets.
  (letrec-syntax ((matches (syntax-rules (=>)
                             ((_ (system-prefix => target) rest ...)
                              (if (string-prefix? system-prefix system)
                                  target
                                  (matches rest ...)))
                             ((_)
                              (error "LLVM target for system is unknown" system)))))
    (matches ("aarch64"     => "AArch64")
             ("armhf"       => "ARM")
             ("mips64el"    => "Mips")
             ("powerpc"     => "PowerPC")
             ("riscv"       => "RISCV")
             ("x86_64"      => "X86")
             ("i686"        => "X86")
             ("i586"        => "X86"))))

(define (llvm-uri component version)
  (string-append "https://github.com/llvm/llvm-project/releases/download"
                 "/llvmorg-" version "/" component "-" version ".src.tar.xz"))

(define* (clang-runtime-from-llvm llvm hash
                                  #:optional (patches '()))
  (package
    (name "clang-runtime")
    (version (package-version llvm))
    (source
     (origin
       (method url-fetch)
       (uri (llvm-uri "compiler-rt" version))
       (sha256 (base32 hash))
       (patches (map search-patch patches))))
    (build-system cmake-build-system)
    (native-inputs (package-native-inputs llvm))
    (inputs
     `(("llvm" ,llvm)))
    (arguments
     `(;; Don't use '-g' during the build to save space.
       #:build-type "Release"
       #:tests? #f                      ; Tests require gtest
       #:modules ((srfi srfi-1)
                  (ice-9 match)
                  ,@%cmake-build-system-modules)
       #:phases (modify-phases (@ (guix build cmake-build-system) %standard-phases)
                  (add-after 'set-paths 'hide-glibc
                    ;; Work around https://issues.guix.info/issue/36882.  We need to
                    ;; remove glibc from CPLUS_INCLUDE_PATH so that the one hardcoded
                    ;; in GCC, at the bottom of GCC include search-path is used.
                    (lambda* (#:key inputs #:allow-other-keys)
                      (let* ((filters '("libc"))
                             (input-directories
                              (filter-map (lambda (input)
                                            (match input
                                              ((name . dir)
                                               (and (not (member name filters))
                                                    dir))))
                                          inputs)))
                        (set-path-environment-variable "CPLUS_INCLUDE_PATH"
                                                       '("include")
                                                       input-directories)
                        #t))))))
    (home-page "https://compiler-rt.llvm.org")
    (synopsis "Runtime library for Clang/LLVM")
    (description
     "The \"clang-runtime\" library provides the implementations of run-time
functions for C and C++ programs.  It also provides header files that allow C
and C++ source code to interface with the \"sanitization\" passes of the clang
compiler.  In LLVM this library is called \"compiler-rt\".")
    (license (package-license llvm))

    ;; <https://compiler-rt.llvm.org/> doesn't list MIPS as supported.
    (supported-systems (delete "mips64el-linux" %supported-systems))))

(define* (clang-from-llvm llvm clang-runtime hash
                          #:key (patches '()) tools-extra)
  "Produce Clang with dependencies on LLVM and CLANG-RUNTIME, and applying the
given PATCHES.  When TOOLS-EXTRA is given, it must point to the
'clang-tools-extra' tarball, which contains code for 'clang-tidy', 'pp-trace',
'modularize', and other tools."
  (package
    (name "clang")
    (version (package-version llvm))
    (source
     (origin
       (method url-fetch)
       (uri (llvm-uri (if (version>=? version "9.0.1")
                                   "clang"
                                   "cfe")
                               version))
       (sha256 (base32 hash))
       (patches (map search-patch patches))))
    ;; Using cmake allows us to treat llvm as an external library.  There
    ;; doesn't seem to be any way to do this with clang's autotools-based
    ;; build system.
    (build-system cmake-build-system)
    (outputs (if tools-extra '("out" "extra") '("out")))
    (native-inputs (package-native-inputs llvm))
    (inputs
     `(("libxml2" ,libxml2)
       ("gcc-lib" ,gcc "lib")
       ,@(package-inputs llvm)
       ,@(if tools-extra
             `(("clang-tools-extra" ,tools-extra))
             '())))
    (propagated-inputs
     `(("llvm" ,llvm)
       ("clang-runtime" ,clang-runtime)))
    (arguments
     `(#:configure-flags
       (list "-DCLANG_INCLUDE_TESTS=True"

             ;; Find libgcc_s, crtbegin.o, and crtend.o.
             (string-append "-DGCC_INSTALL_PREFIX="
                            (assoc-ref %build-inputs "gcc-lib"))

             ;; Use a sane default include directory.
             (string-append "-DC_INCLUDE_DIRS="
                            (assoc-ref %build-inputs "libc")
                            "/include"))

       ;; Don't use '-g' during the build to save space.
       #:build-type "Release"

       #:phases (modify-phases %standard-phases
                  ,@(if tools-extra
                        `((add-after 'unpack 'add-tools-extra
                            (lambda* (#:key inputs #:allow-other-keys)
                              ;; Unpack the 'clang-tools-extra' tarball under
                              ;; tools/.
                              (let ((extra (assoc-ref inputs
                                                      "clang-tools-extra")))
                                (invoke "tar" "xf" extra)
                                (rename-file ,(string-append
                                               "clang-tools-extra-"
                                               (package-version llvm)
                                               ".src")
                                             "tools/extra")
                                #t)))
                          (add-after 'install 'move-extra-tools
                            (lambda* (#:key outputs #:allow-other-keys)
                              ;; Move the extra tools to the "extra" output.
                              ;; These programs alone weigh in at 296 MiB,
                              ;; because they statically-link a whole bunch of
                              ;; Clang libraries.
                              (let* ((out   (assoc-ref outputs "out"))
                                     (extra (assoc-ref outputs "extra"))
                                     (bin   (string-append out "/bin"))
                                     (bin*  (string-append extra "/bin"))
                                     (lib   (string-append out "/lib")))
                                (define (move program)
                                  (rename-file (string-append bin "/" program)
                                               (string-append bin* "/"
                                                              program)))

                                (mkdir-p bin*)
                                (for-each move
                                          '("clang-apply-replacements"
                                            "clang-change-namespace"
                                            "clangd"
                                            "clang-doc"
                                            "clang-include-fixer"
                                            "clang-move"
                                            "clang-query"
                                            "clang-reorder-fields"
                                            "clang-tidy"
                                            "find-all-symbols"
                                            "modularize"
                                            "pp-trace"))

                                ;; Remove MiBs of .a files coming from
                                ;; 'clang-tools-extra'.
                                (for-each (lambda (component)
                                            (delete-file
                                             (string-append lib "/libclang"
                                                            component ".a")))
                                          '("ApplyReplacements"
                                            "ChangeNamespace"
                                            "Daemon"
                                            "DaemonTweaks"
                                            "Doc"
                                            "IncludeFixer"
                                            "IncludeFixerPlugin"
                                            "Move"))
                                (for-each delete-file
                                          (find-files
                                           lib
                                           "^(libfindAllSymbols|libclangTidy)"))
                                #t))))
                        '())
                  (add-after 'unpack 'add-missing-triplets
                    (lambda _
                      ;; Clang iterates through known triplets to search for
                      ;; GCC's headers, but does not recognize some of the
                      ;; triplets that are used in Guix.
                      (substitute* ,@(if (version>=? version "6.0")
                                         '("lib/Driver/ToolChains/Gnu.cpp")
                                         '("lib/Driver/ToolChains.cpp"))
                        (("\"aarch64-linux-gnu\"," all)
                         (string-append "\"aarch64-unknown-linux-gnu\", "
                                        all))
                        (("\"arm-linux-gnueabihf\"," all)
                         (string-append all
                                        " \"arm-unknown-linux-gnueabihf\","))
                        (("\"i686-pc-linux-gnu\"," all)
                         (string-append "\"i686-unknown-linux-gnu\", "
                                        all)))
                      #t))
                  (add-after 'unpack 'set-glibc-file-names
                    (lambda* (#:key inputs #:allow-other-keys)
                      (let ((libc (assoc-ref inputs "libc"))
                            (compiler-rt (assoc-ref inputs "clang-runtime"))
                            (gcc (assoc-ref inputs "gcc")))
                        ,@(cond
                           ((version>=? version "6.0")
                            `(;; Link to libclang_rt files from clang-runtime.
                              (substitute* "lib/Driver/ToolChain.cpp"
                                (("getDriver\\(\\)\\.ResourceDir")
                                 (string-append "\"" compiler-rt "\"")))

                              ;; Make "LibDir" refer to <glibc>/lib so that it
                              ;; uses the right dynamic linker file name.
                              (substitute* "lib/Driver/ToolChains/Linux.cpp"
                                (("(^[[:blank:]]+LibDir = ).*" _ declaration)
                                 (string-append declaration "\"" libc "/lib\";\n"))

                                ;; Make clang look for libstdc++ in the right
                                ;; location.
                                (("LibStdCXXIncludePathCandidates\\[\\] = \\{")
                                 (string-append
                                  "LibStdCXXIncludePathCandidates[] = { \"" gcc
                                  "/include/c++\","))

                                ;; Make sure libc's libdir is on the search path, to
                                ;; allow crt1.o & co. to be found.
                                (("@GLIBC_LIBDIR@")
                                 (string-append libc "/lib")))))
                           (else
                            `((substitute* "lib/Driver/Tools.cpp"
                                ;; Patch the 'getLinuxDynamicLinker' function so that
                                ;; it uses the right dynamic linker file name.
                                (("/lib64/ld-linux-x86-64.so.2")
                                 (string-append libc
                                                ,(glibc-dynamic-linker))))

                              ;; Link to libclang_rt files from clang-runtime.
                              ;; This substitution needed slight adjustment in 3.8.
                              ,@(if (version>=? version "3.8")
                                    '((substitute* "lib/Driver/Tools.cpp"
                                        (("TC\\.getDriver\\(\\)\\.ResourceDir")
                                         (string-append "\"" compiler-rt "\""))))
                                    '((substitute* "lib/Driver/ToolChain.cpp"
                                        (("getDriver\\(\\)\\.ResourceDir")
                                         (string-append "\"" compiler-rt "\"")))))

                              ;; Make sure libc's libdir is on the search path, to
                              ;; allow crt1.o & co. to be found.
                              (substitute* "lib/Driver/ToolChains.cpp"
                                (("@GLIBC_LIBDIR@")
                                 (string-append libc "/lib"))))))
                        #t)))
                  ,@(if (version>=? version "10")
                        `((add-after 'install 'adjust-cmake-file
                            (lambda* (#:key outputs #:allow-other-keys)
                              (let ((out (assoc-ref outputs "out")))
                                ;; Clang generates a CMake file with "targets"
                                ;; for each installed library file.  Downstream
                                ;; consumers of the CMake interface can use this
                                ;; to get absolute library locations.  Including
                                ;; this file will needlessly assert that _all_
                                ;; libraries are available, which causes problems
                                ;; in Guix because some are removed (see the
                                ;; move-extra-tools phase).  Thus, remove the
                                ;; asserts so that the main functionality works.
                                (substitute*
                                    (string-append
                                     out
                                     "/lib/cmake/clang/ClangTargets-release.cmake")
                                  (("list\\(APPEND _IMPORT_CHECK_TARGETS.*" all)
                                   (string-append "# Disabled by Guix.\n#" all)))
                                #t))))
                        '())
                  ,@(if (version>? version "3.8")
                        `((add-after 'install 'symlink-cfi_blacklist
                            (lambda* (#:key inputs outputs #:allow-other-keys)
                              (let* ((out (assoc-ref outputs "out"))
                                     (lib-share (string-append out "/lib/clang/"
                                                               ,version "/share"))
                                     (compiler-rt (assoc-ref inputs "clang-runtime"))
                                     ;; The location varies between Clang versions.
                                     (cfi-blacklist
                                      (cond
                                       ((file-exists?
                                         (string-append compiler-rt "/cfi_blacklist.txt"))
                                        (string-append compiler-rt "/cfi_blacklist.txt"))
                                       (else (string-append compiler-rt
                                                            "/share/cfi_blacklist.txt")))))
                                (mkdir-p lib-share)
                                ;; Symlink cfi_blacklist.txt to where Clang expects
                                ;; to find it.
                                (symlink cfi-blacklist
                                         (string-append lib-share "/cfi_blacklist.txt"))
                                #t))))
                        '())
                  (add-after 'install 'install-clean-up-/share/clang
                    (lambda* (#:key outputs #:allow-other-keys)
                      (let* ((out (assoc-ref outputs "out"))
                             (compl-dir (string-append
                                         out "/etc/bash_completion.d")))
                        (with-directory-excursion (string-append out
                                                                 "/share/clang")
                          (for-each
                            (lambda (file)
                              (when (file-exists? file)
                                (delete-file file)))
                            ;; Delete extensions for proprietary text editors.
                            '("clang-format-bbedit.applescript"
                              "clang-format-sublime.py"
                              ;; Delete Emacs extensions: see their respective Emacs
                              ;; Guix package instead.
                              "clang-rename.el" "clang-format.el"))
                          ;; Install bash completion.
                          (when (file-exists?  "bash-autocomplete.sh")
                            (mkdir-p compl-dir)
                            (rename-file "bash-autocomplete.sh"
                                         (string-append compl-dir "/clang")))))
                      #t)))))

    ;; Clang supports the same environment variables as GCC.
    (native-search-paths
     (list (search-path-specification
            (variable "C_INCLUDE_PATH")
            (files '("include")))
           (search-path-specification
            (variable "CPLUS_INCLUDE_PATH")
            (files '("include/c++" "include")))
           (search-path-specification
            (variable "LIBRARY_PATH")
            (files '("lib" "lib64")))))

    (home-page "https://clang.llvm.org")
    (synopsis "C language family frontend for LLVM")
    (description
     "Clang is a compiler front end for the C, C++, Objective-C and
Objective-C++ programming languages.  It uses LLVM as its back end.  The Clang
project includes the Clang front end, the Clang static analyzer, and several
code analysis tools.")
    (license (if (version>=? version "9.0")
                 license:asl2.0         ;with LLVM exceptions
                 license:ncsa))))

(define (make-clang-toolchain clang)
  (package
    (name (string-append (package-name clang) "-toolchain"))
    (version (package-version clang))
    (source #f)
    (build-system trivial-build-system)
    (arguments
     '(#:modules ((guix build union))
       #:builder (begin
                   (use-modules (ice-9 match)
                                (srfi srfi-26)
                                (guix build union))

                   (let ((out (assoc-ref %outputs "out")))

                     (match %build-inputs
                       (((names . directories) ...)
                        (union-build out directories)))

                     ;; Create 'cc' and 'c++' so that one can use it as a
                     ;; drop-in replacement for the default tool chain and
                     ;; have configure scripts find the compiler.
                     (symlink "clang" (string-append out "/bin/cc"))
                     (symlink "clang++" (string-append out "/bin/c++"))

                     (union-build (assoc-ref %outputs "debug")
                                  (list (assoc-ref %build-inputs
                                                   "libc-debug")))
                     (union-build (assoc-ref %outputs "static")
                                  (list (assoc-ref %build-inputs
                                                   "libc-static")))
                     #t))))

    (native-search-paths
     (append (package-native-search-paths clang)
             (list (search-path-specification     ;copied from glibc
                    (variable "GUIX_LOCPATH")
                    (files '("lib/locale"))))))
    (search-paths (package-search-paths clang))

    (license (package-license clang))
    (home-page "https://clang.llvm.org")
    (synopsis "Complete Clang toolchain for C/C++ development")
    (description "This package provides a complete Clang toolchain for C/C++
development to be installed in user profiles.  This includes Clang, as well as
libc (headers and binaries, plus debugging symbols in the @code{debug}
output), and Binutils.")
    (outputs '("out" "debug" "static"))
    (inputs `(("clang" ,clang)
              ("ld-wrapper" ,(car (assoc-ref (%final-inputs) "ld-wrapper")))
              ("binutils" ,binutils)
              ("libc" ,glibc)
              ("libc-debug" ,glibc "debug")
              ("libc-static" ,glibc "static")))))

(define-public llvm-12
  (package
    (name "llvm")
    (version "12.0.0")
    (source
     (origin
      (method url-fetch)
      (uri (llvm-uri "llvm" version))
      (sha256
       (base32
        "0l4b79gwfvxild974aigcq1yigypjsk2j5p59syhl6ksd744gp29"))))
    (build-system cmake-build-system)
    (outputs '("out" "opt-viewer"))
    (native-inputs
     `(("python" ,python-wrapper)
       ("perl"   ,perl)))
    (inputs
     `(("libffi" ,libffi)))
    (propagated-inputs
     `(("zlib" ,zlib)))                 ;to use output from llvm-config
    (arguments
     ;; TODO(core-updates): Unconditionally use quasiquote
     `(#:configure-flags
       ,#~(#$(if (%current-target-system)
                 #~quasiquote
                 #~quote)
           ;; These options are required for cross-compiling LLVM according to
           ;; https://llvm.org/docs/HowToCrossCompileLLVM.html.
           (#$@(if (%current-target-system)
                   #~(,(string-append "-DLLVM_TABLEGEN="
                                      #+(file-append this-package
                                                     "/bin/llvm-tblgen"))
                      #$(string-append "-DLLVM_DEFAULT_TARGET_TRIPLE="
                                       (%current-target-system))
                      #$(string-append "-DLLVM_TARGET_ARCH="
                                       (system->llvm-target))
                      #$(string-append "-DLLVM_TARGETS_TO_BUILD="
                                       (system->llvm-target)))
                   #~())
            "-DCMAKE_SKIP_BUILD_RPATH=FALSE"
            "-DCMAKE_BUILD_WITH_INSTALL_RPATH=FALSE"
            "-DBUILD_SHARED_LIBS:BOOL=TRUE"
            "-DLLVM_ENABLE_FFI:BOOL=TRUE"
            "-DLLVM_REQUIRES_RTTI=1" ; For some third-party utilities
            "-DLLVM_INSTALL_UTILS=ON")) ; Needed for rustc.
       ;; Don't use '-g' during the build, to save space.
       #:build-type "Release"
       #:phases
       (modify-phases %standard-phases
         (add-before 'build 'shared-lib-workaround
           ;; Even with CMAKE_SKIP_BUILD_RPATH=FALSE, llvm-tblgen
           ;; doesn't seem to get the correct rpath to be able to run
           ;; from the build directory.  Set LD_LIBRARY_PATH as a
           ;; workaround.
           (lambda _
             (setenv "LD_LIBRARY_PATH"
                     (string-append (getcwd) "/lib"))
             #t))
         (add-after 'install 'install-opt-viewer
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (opt-viewer-out (assoc-ref outputs "opt-viewer"))
                    (opt-viewer-share-dir (string-append opt-viewer-out "/share"))
                    (opt-viewer-dir (string-append opt-viewer-share-dir "/opt-viewer")))
               (mkdir-p opt-viewer-share-dir)
               (rename-file (string-append out "/share/opt-viewer")
                            opt-viewer-dir))
             #t)))))
    (home-page "https://www.llvm.org")
    (synopsis "Optimizing compiler infrastructure")
    (description
     "LLVM is a compiler infrastructure designed for compile-time, link-time,
runtime, and idle-time optimization of programs from arbitrary programming
languages.  It currently supports compilation of C and C++ programs, using
front-ends derived from GCC 4.0.1.  A new front-end for the C family of
languages is in development.  The compiler infrastructure includes mirror sets
of programming tools as well as libraries with equivalent functionality.")
    (license license:asl2.0)))  ;with LLVM exceptions, see LICENSE.txt

(define-public clang-runtime-12
  (clang-runtime-from-llvm
   llvm-12
   "0d444qihq9jhqnfv003cr704v363va72zl6qaw2algj1c85cva45"))

(define-public clang-12
  (clang-from-llvm llvm-12 clang-runtime-12
                   "1vd9rhhrd8ghdg111lac7w8by71y9l14yh5zxfijsm6lj4p4avp2"
                   #:patches '("clang-11.0-libc-search-path.patch")
                   #:tools-extra
                   (origin
                     (method url-fetch)
                     (uri (llvm-uri "clang-tools-extra"
                                    (package-version llvm-12)))
                     (patches
                      (search-patches "clang-12-tools-extra-directory.patch"))
                     (sha256
                      (base32
                       "0p3dzr0qa7mar83y66xa5m5apynf6ia0lsdsq6axwnm64ysy0hdd")))))

(define-public clang-toolchain-12
  (make-clang-toolchain clang-12))

(define-public llvm-11
  (package
    (inherit llvm-12)
    (version "11.0.0")
    (source
     (origin
      (method url-fetch)
      (uri (llvm-uri "llvm" version))
      (sha256
       (base32
        "0s94lwil98w7zb7cjrbnxli0z7gklb312pkw74xs1d6zk346hgwi"))))))

(define-public clang-runtime-11
  (clang-runtime-from-llvm
   llvm-11
   "0d5j5l8phwqjjscmk8rmqn0i2i0abl537gdbkagl8fjpzy1gyjip"))

(define-public clang-11
  (clang-from-llvm llvm-11 clang-runtime-11
                   "02ajkij85966vd150iy246mv16dsaph1kfi0y8wnncp8w6nar5hg"
                   #:patches '("clang-11.0-libc-search-path.patch")
                   #:tools-extra
                   (origin
                     (method url-fetch)
                     (uri (llvm-uri "clang-tools-extra"
                                    (package-version llvm-11)))
                     (sha256
                      (base32
                       "02bcwwn54661madhq4nxc069s7p7pj5gpqi8ww50w3anbpviilzy")))))

(define-public clang-toolchain-11
  (make-clang-toolchain clang-11))

(define-public llvm-10
  (package
    (inherit llvm-11)
    (version "10.0.1")
    (source
     (origin
      (method url-fetch)
      (uri (llvm-uri "llvm" version))
      (sha256
       (base32
        "1wydhbp9kyjp5y0rc627imxgkgqiv3dfirbqil9dgpnbaw5y7n65"))))))

(define-public clang-runtime-10
  (clang-runtime-from-llvm
   llvm-10
   "1yjqjri753w0fzmxcyz687nvd97sbc9rsqrxzpq720na47hwh3fr"))

(define-public clang-10
  (clang-from-llvm llvm-10 clang-runtime-10
                   "091bvcny2lh32zy8f3m9viayyhb2zannrndni7325rl85cwgr6pr"
                   #:patches '("clang-10.0-libc-search-path.patch")
                   #:tools-extra
                   (origin
                     (method url-fetch)
                     (uri (llvm-uri "clang-tools-extra"
                                             (package-version llvm-10)))
                     (sha256
                      (base32
                       "06n1yp638rh24xdxv9v2df0qajxbjz4w59b7dd4ky36drwmpi4yh")))))

(define-public clang-toolchain-10
  (make-clang-toolchain clang-10))

(define-public llvm-9
  (package
    (inherit llvm-10)
    (version "9.0.1")
    (source
     (origin
       (method url-fetch)
       (uri (llvm-uri "llvm" version))
       (sha256
        (base32
         "16hwp3qa54c3a3v7h8nlw0fh5criqh0hlr1skybyk0cz70gyx880"))
       (patches (search-patches
                 "llvm-9-fix-bitcast-miscompilation.patch"
                 "llvm-9-fix-scev-miscompilation.patch"
                 "llvm-9-fix-lpad-miscompilation.patch"))))))

(define-public clang-runtime-9
  (clang-runtime-from-llvm
   llvm-9
   "0xwh79g3zggdabxgnd0bphry75asm1qz7mv3hcqihqwqr6aspgy2"
   '("clang-runtime-9-libsanitizer-mode-field.patch")))

(define-public clang-9
  (clang-from-llvm llvm-9 clang-runtime-9
                   "0ls2h3iv4finqyflyhry21qhc9cm9ga7g1zq21020p065qmm2y2p"
                   #:patches '("clang-9.0-libc-search-path.patch")))

(define-public clang-toolchain-9
  (make-clang-toolchain clang-9))

(define-public llvm-8
  (package
    (inherit llvm-9)
    (version "8.0.0")
    (source (origin
              (method url-fetch)
              (uri (llvm-uri "llvm" version))
              (sha256
               (base32
                "0k124sxkfhfi1rca6kzkdraf4axhx99x3cw2rk55056628dvwwl8"))))
    (license license:ncsa)))

(define-public clang-runtime-8
  (clang-runtime-from-llvm
   llvm-8
   "1c919wsm17xnv7lr8bhpq2wkq8113lzlw6hzhfr737j59x3wfddl"
   '("clang-runtime-9-libsanitizer-mode-field.patch")))

(define-public clang-8
  (clang-from-llvm llvm-8 clang-runtime-8
                   "0svk1f70hvpwrjp6x5i9kqwrqwxnmcrw5s7f4cxyd100mdd12k08"
                   #:patches '("clang-7.0-libc-search-path.patch")))

(define-public clang-toolchain-8
  (make-clang-toolchain clang-8))

(define-public llvm-7
  (package
    (inherit llvm-8)
    (version "7.1.0")
    (source (origin
              (method url-fetch)
              (uri (llvm-uri "llvm" version))
              (sha256
               (base32
                "0r1p5didv4rkgxyvbkyz671xddg6i3dxvbpsi1xxipkla0l9pk0v"))))))

(define-public clang-runtime-7
  (clang-runtime-from-llvm
   llvm-7
   "1n48p8gjarihkws0i2bay5w9bdwyxyxxbpwyng7ba58jb30dlyq5"
   '("clang-runtime-9-libsanitizer-mode-field.patch")))

(define-public clang-7
  (clang-from-llvm llvm-7 clang-runtime-7
                   "0vc4i87qwxnw9lci4ayws9spakg0z6w5w670snj9f8g5m9rc8zg9"
                   #:patches '("clang-7.0-libc-search-path.patch")))

(define-public clang-toolchain-7
  (make-clang-toolchain clang-7))

(define-public llvm-6
  (package
    (inherit llvm-7)
    (version "6.0.1")
    (source (origin
              (method url-fetch)
              (uri (llvm-uri "llvm" version))
              (sha256
               (base32
                "1qpls3vk85lydi5b4axl0809fv932qgsqgdgrk098567z4jc7mmn"))))))

(define-public clang-runtime-6
  (clang-runtime-from-llvm
   llvm-6
   "1fcr3jn24yr8lh36nc0c4ikli4744i2q9m1ik67p1jymwwaixkgl"
   '("clang-runtime-9-libsanitizer-mode-field.patch")))

(define-public clang-6
  (clang-from-llvm llvm-6 clang-runtime-6
                   "0rxn4rh7rrnsqbdgp4gzc8ishbkryhpl1kd3mpnxzpxxhla3y93w"
                   #:patches '("clang-6.0-libc-search-path.patch")))

(define-public clang-toolchain-6
  (make-clang-toolchain clang-6))

(define-public llvm-3.9.1
  (package (inherit llvm-6)
    (name "llvm")
    (version "3.9.1")
    (source
     (origin
      (method url-fetch)
      (uri (llvm-uri "llvm" version))
      (sha256
       (base32
        "1vi9sf7rx1q04wj479rsvxayb6z740iaz3qniwp266fgp5a07n8z"))))
    (outputs '("out"))
    (arguments
     (substitute-keyword-arguments (package-arguments llvm)
       ((#:phases phases)
        `(modify-phases ,phases
           (delete 'install-opt-viewer)))))))

(define-public clang-runtime-3.9.1
  (clang-runtime-from-llvm
   llvm-3.9.1
   "16gc2gdmp5c800qvydrdhsp0bzb97s8wrakl6i8a4lgslnqnf2fk"
   '("clang-runtime-3.9-libsanitizer-mode-field.patch"
     "clang-runtime-asan-build-fixes.patch"
     "clang-runtime-esan-build-fixes.patch"
     "clang-3.5-libsanitizer-ustat-fix.patch")))

(define-public clang-3.9.1
  (clang-from-llvm llvm-3.9.1 clang-runtime-3.9.1
                   "0qsyyb40iwifhhlx9a3drf8z6ni6zwyk3bvh0kx2gs6yjsxwxi76"
                   #:patches '("clang-3.8-libc-search-path.patch")))

(define-public llvm-3.8
  (package (inherit llvm-3.9.1)
    (name "llvm")
    (version "3.8.1")
    (source
     (origin
      (method url-fetch)
      (uri (llvm-uri "llvm" version))
      (sha256
       (base32
        "1ybmnid4pw2hxn12ax5qa5kl1ldfns0njg8533y3mzslvd5cx0kf"))))))

(define-public clang-runtime-3.8
  (clang-runtime-from-llvm
   llvm-3.8
   "0p0y85c7izndbpg2l816z7z7558axq11d5pwkm4h11sdw7d13w0d"
   '("clang-runtime-asan-build-fixes.patch"
     "clang-runtime-3.8-libsanitizer-mode-field.patch"
     "clang-3.5-libsanitizer-ustat-fix.patch")))

(define-public clang-3.8
  (clang-from-llvm llvm-3.8 clang-runtime-3.8
                   "1prc72xmkgx8wrzmrr337776676nhsp1qd3mw2bvb22bzdnq7lsc"
                   #:patches '("clang-3.8-libc-search-path.patch")))

(define-public llvm-3.7
  (package (inherit llvm-3.8)
    (version "3.7.1")
    (source
     (origin
       (method url-fetch)
       (uri (llvm-uri "llvm" version))
       (sha256
        (base32
         "1masakdp9g2dan1yrazg7md5am2vacbkb3nahb3dchpc1knr8xxy"))))))

(define-public clang-runtime-3.7
  (clang-runtime-from-llvm
   llvm-3.7
   "10c1mz2q4bdq9bqfgr3dirc6hz1h3sq8573srd5q5lr7m7j6jiwx"
   '("clang-runtime-asan-build-fixes.patch"
     "clang-runtime-3.8-libsanitizer-mode-field.patch"
     "clang-3.5-libsanitizer-ustat-fix.patch")))

(define-public clang-3.7
  (clang-from-llvm llvm-3.7 clang-runtime-3.7
                   "0x065d0w9b51xvdjxwfzjxng0gzpbx45fgiaxpap45ragi61dqjn"
                   #:patches '("clang-3.5-libc-search-path.patch")))

(define-public llvm-3.6
  (package (inherit llvm-3.7)
    (version "3.6.2")
    (source
     (origin
       (method url-fetch)
       (uri (llvm-uri "llvm" version))
       (patches
        (search-patches "llvm-3.6-fix-build-with-gcc-10.patch"))
       (sha256
        (base32
         "153vcvj8gvgwakzr4j0kndc0b7wn91c2g1vy2vg24s6spxcc23gn"))))))

(define-public llvm-3.5
  (package (inherit llvm-3.6)
    (version "3.5.2")
    (source
     (origin
       (method url-fetch)
       (uri (llvm-uri "llvm" version))
       (patches
        (search-patches "llvm-3.5-fix-clang-build-with-gcc5.patch"))
       (sha256
        (base32
         "0xf5q17kkxsrm2gsi93h4pwlv663kji73r2g4asb97klsmb626a4"))))))

(define-public clang-runtime-3.5
  (let ((runtime (clang-runtime-from-llvm
                  llvm-3.5
                  "1hsdnzzdr5kglz6fnv3lcsjs222zjsy14y8ax9dy6zqysanplbal"
                  '("clang-runtime-asan-build-fixes.patch"
                    "clang-runtime-3.5-libsanitizer-mode-field.patch"
                    "clang-3.5-libsanitizer-ustat-fix.patch"))))
    (package/inherit runtime
      (arguments
       (substitute-keyword-arguments (package-arguments runtime)
         ((#:phases phases '%standard-phases)
          `(modify-phases ,phases
             ;; glibc no longer includes rpc/xdr.h, so we use the headers from
             ;; libtirpc.
             (add-after 'unpack 'find-rpc-includes
               (lambda* (#:key inputs #:allow-other-keys)
                 (setenv "CPATH"
                         (string-append
                          (search-input-directory inputs "/include/tirpc")
                          ":" (or (getenv "CPATH") "")))
                 (setenv "CPLUS_INCLUDE_PATH"
                         (string-append
                          (search-input-directory inputs "/include/tirpc")
                          ":" (or (getenv "CPLUS_INCLUDE_PATH") "")))))))))
      (inputs
       `(("libtirpc" ,libtirpc)
         ("llvm" ,llvm-3.5))))))

(define-public clang-3.5
  (clang-from-llvm llvm-3.5 clang-runtime-3.5
                   "0846h8vn3zlc00jkmvrmy88gc6ql6014c02l4jv78fpvfigmgssg"
                   #:patches '("clang-3.5-libc-search-path.patch")))

;; Default LLVM and Clang version.
(define-public llvm llvm-9)
(define-public clang-runtime clang-runtime-9)
(define-public clang clang-9)
(define-public clang-toolchain clang-toolchain-9)

(define-public llvm-for-rocm
  (package
    ;; Actually based on LLVM 13 as of v4.3, but llvm-12 works just fine.
    (inherit llvm-12)
    (name "llvm-for-rocm")
    (version "4.3.0")                         ;this must match '%rocm-version'
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/RadeonOpenCompute/llvm-project.git")
                    (commit (string-append "rocm-" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "0p75nr1qpmy6crymdax5hm40wkimman4lnglz4x5cnbiqindya7s"))
              (patches
               (search-patches "llvm-roc-4.2.0-add_Object.patch"
                               "llvm-roc-3.0.0-add_libraries.patch"
                               "llvm-roc-4.0.0-remove-isystem-usr-include.patch"))))
    (arguments
     (substitute-keyword-arguments (package-arguments llvm-12)
       ((#:phases phases '%standard-phases)
        `(modify-phases ,phases
           (add-after 'unpack 'chdir
             (lambda _
               (chdir "llvm")))))
       ((#:configure-flags flags)
        ''("-DLLVM_ENABLE_PROJECTS=llvm;clang;lld"
           "-DLLVM_TARGETS_TO_BUILD=AMDGPU;X86"
           "-DCMAKE_SKIP_BUILD_RPATH=FALSE"
           "-DCMAKE_BUILD_WITH_INSTALL_RPATH=FALSE"
           "-DBUILD_SHARED_LIBS:BOOL=TRUE"
           "-DLLVM_VERSION_SUFFIX="))))
    (properties `((hidden? . #t)
                  ,@(package-properties llvm-12)))))


(define-public lld
  (package
    (name "lld")
    (version "11.0.0")
    (source (origin
              (method url-fetch)
              (uri (llvm-uri "lld" version))
              (sha256
               (base32
                "077xyh7sij6mhp4dc4kdcmp9whrpz332fa12rwxnzp3wgd5bxrzg"))))
    (build-system cmake-build-system)
    (inputs
     `(("llvm" ,llvm-11)))
    (arguments
     `(#:build-type "Release"
       ;; TODO: Tests require the lit tool, which isn't installed by the LLVM
       ;; package.
       #:tests? #f))
    (home-page "https://lld.llvm.org/")
    (synopsis "Linker from the LLVM project")
    (description "LLD is a high-performance linker, built as a set of reusable
components which highly leverage existing libraries in the larger LLVM Project.")
    (license license:asl2.0))) ; With LLVM exception

(define-public lldb
  (package
    (name "lldb")
    (version "11.0.0")
    (source (origin
              (method url-fetch)
              (uri (llvm-uri "lldb" version))
              (sha256
               (base32
                "0wic9lyb2la9bkzdc13szkm4f793w1mddp50xvh237iraygw0w45"))))
    (build-system cmake-build-system)
    (arguments
     `(#:configure-flags '("-DCMAKE_CXX_COMPILER=clang++")))
    (native-inputs
     `(("pkg-config" ,pkg-config)
       ("swig" ,swig)))
    (inputs
     `(("clang" ,clang-11)
       ("llvm" ,llvm-11)

       ;; Optional (but recommended) inputs.
       ("curses" ,ncurses)
       ("editline" ,libedit)
       ("liblzma" ,xz)
       ("libxml2" ,libxml2)
       ("lua" ,lua)
       ("python" ,python)))
    (home-page "https://lldb.llvm.org/")
    (synopsis "Low level debugger")
    (description
     "LLDB is a high performance debugger built as a set of reusable components
which highly leverage existing libraries in the larger LLVM project.")
    (license license:asl2.0))) ;with LLVM exceptions

(define-public libcxx
  (package
    (name "libcxx")
    (version "9.0.1")
    (source
     (origin
       (method url-fetch)
       (uri (llvm-uri "libcxx" version))
       (sha256
        (base32
         "0d2bj5i6mk4caq7skd5nsdmz8c2m5w5anximl5wz3x32p08zz089"))))
    (build-system cmake-build-system)
    (arguments
     `(#:phases
       (modify-phases (@ (guix build cmake-build-system) %standard-phases)
         (add-after 'set-paths 'adjust-CPLUS_INCLUDE_PATH
           (lambda* (#:key inputs #:allow-other-keys)
             (let ((gcc (assoc-ref inputs  "gcc")))
               ;; Hide GCC's C++ headers so that they do not interfere with
               ;; the ones we are attempting to build.
               (setenv "CPLUS_INCLUDE_PATH"
                       (string-join (delete (string-append gcc "/include/c++")
                                            (string-split (getenv "CPLUS_INCLUDE_PATH")
                                                          #\:))
                                    ":"))
               (format #t
                       "environment variable `CPLUS_INCLUDE_PATH' changed to ~a~%"
                       (getenv "CPLUS_INCLUDE_PATH"))
               #t))))))
    (native-inputs
     `(("clang" ,clang)
       ("llvm" ,llvm)))
    (home-page "https://libcxx.llvm.org")
    (synopsis "C++ standard library")
    (description
     "This package provides an implementation of the C++ standard library for
use with Clang, targeting C++11, C++14 and above.")
    (license license:expat)))

;; Libcxx files specifically used by PySide2.
(define-public libcxx-6
  (package
    (inherit libcxx)
    (version (package-version llvm-6))
    (source
     (origin
       (inherit (package-source libcxx))
       (uri (llvm-uri "libcxx" version))
       (sha256
        (base32
         "0rzw4qvxp6qx4l4h9amrq02gp7hbg8lw4m0sy3k60f50234gnm3n"))))
    (native-inputs
     `(("clang" ,clang-6)
       ("llvm" ,llvm-6)))))

(define-public libcxxabi-6
  (package
    (name "libcxxabi")
    (version "6.0.1")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/llvm/llvm-project")
             (commit (string-append "llvmorg-" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32
         "0ki6796b5z08kh3a3rbysr5wwb2dkl6wal5dzd03i4li5xfkvx1g"))))
    (build-system cmake-build-system)
    (arguments
     `(#:configure-flags
       (list (string-append "-DLIBCXXABI_LIBCXX_INCLUDES="
                            (assoc-ref %build-inputs "libcxx")
                            "/include")
             "-DCMAKE_C_COMPILER=clang"
             "-DCMAKE_CXX_COMPILER=clang++")
       #:phases
       (modify-phases (@ (guix build cmake-build-system) %standard-phases)
         (add-after 'unpack 'chdir
           (lambda _ (chdir "libcxxabi")))
         (add-after 'set-paths 'adjust-CPLUS_INCLUDE_PATH
           (lambda* (#:key inputs #:allow-other-keys)
             (let ((gcc (assoc-ref inputs  "gcc")))
               ;; Hide GCC's C++ headers so that they do not interfere with
               ;; the ones we are attempting to build.
               (setenv "CPLUS_INCLUDE_PATH"
                       (string-join
                        (cons (string-append
                               (assoc-ref inputs "libcxx") "/include/c++/v1")
                              (delete (string-append gcc "/include/c++")
                                      (string-split (getenv "CPLUS_INCLUDE_PATH")
                                                    #\:)))
                        ":"))
               (format #true
                       "environment variable `CPLUS_INCLUDE_PATH' changed to ~a~%"
                       (getenv "CPLUS_INCLUDE_PATH")))))
         (add-after 'install 'install-headers
           (lambda* (#:key outputs #:allow-other-keys)
             (let ((include-dir (string-append
                                 (assoc-ref outputs "out") "/include")))
               (install-file "../libcxxabi/include/__cxxabi_config.h" include-dir)
               (install-file "../libcxxabi/include/cxxabi.h" include-dir)))))))
    (native-inputs
     `(("clang" ,clang-6)
       ("llvm" ,llvm-6)
       ("libcxx" ,libcxx-6)))
    (home-page "https://libcxxabi.llvm.org")
    (synopsis "C++ standard library support")
    (description
     "This package provides an implementation of low level support for a
standard C++ library.")
    (license license:expat)))

(define-public libcxx+libcxxabi-6
  (package
    (inherit libcxx-6)
    (name "libcxx+libcxxabi")
    (version (package-version libcxx-6))
    (arguments
     `(#:configure-flags
       (list "-DLIBCXX_CXX_ABI=libcxxabi"
             (string-append "-DLIBCXX_CXX_ABI_INCLUDE_PATHS="
                            (assoc-ref %build-inputs "libcxxabi")
                            "/include"))
       #:phases
       (modify-phases (@ (guix build cmake-build-system) %standard-phases)
         (add-after 'set-paths 'adjust-CPLUS_INCLUDE_PATH
           (lambda* (#:key inputs #:allow-other-keys)
             (let ((gcc (assoc-ref inputs  "gcc")))
               ;; Hide GCC's C++ headers so that they do not interfere with
               ;; the ones we are attempting to build.
               (setenv "CPLUS_INCLUDE_PATH"
                       (string-join
                        (delete (string-append gcc "/include/c++")
                                (string-split (getenv "CPLUS_INCLUDE_PATH")
                                              #\:))
                        ":"))
               (format #true
                       "environment variable `CPLUS_INCLUDE_PATH' changed to ~a~%"
                       (getenv "CPLUS_INCLUDE_PATH"))))))))
    (native-inputs
     `(("clang" ,clang-6)
       ("llvm" ,llvm-6)
       ("libcxxabi" ,libcxxabi-6)))))

(define-public libclc
  (package
    (name "libclc")
    (version "9.0.1")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/llvm/llvm-project")
             (commit (string-append "llvmorg-" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32
         "1d1qayvrvvc1di7s7jfxnjvxq2az4lwq1sw1b2gq2ic0nksvajz0"))))
    (build-system cmake-build-system)
    (arguments
     `(#:configure-flags
       (list (string-append "-DLLVM_CLANG="
                            (assoc-ref %build-inputs "clang")
                            "/bin/clang")
             (string-append "-DPYTHON="
                            (assoc-ref %build-inputs "python")
                            "/bin/python3"))
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'chdir
           (lambda _ (chdir "libclc") #t)))))
    (native-inputs
     `(("clang" ,clang)
       ("llvm" ,llvm)
       ("python" ,python)))
    (home-page "https://libclc.llvm.org")
    (synopsis "Libraries for the OpenCL programming language")
    (description
     "This package provides an implementation of the OpenCL library
requirements according to version 1.1 of the OpenCL specification.")
    ;; Apache license 2.0 with LLVM exception
    (license license:asl2.0)))

(define-public libomp
  (package
    (name "libomp")
    (version "9.0.1")
    (source (origin
              (method url-fetch)
              (uri (llvm-uri "openmp" version))
              (sha256
               (base32
                "1knafnpp0f7hylx8q20lkd6g1sf0flly572dayc5d5kghh7hd52w"))
              (file-name (string-append "libomp-" version ".tar.xz"))))
    (build-system cmake-build-system)
    ;; XXX: Note this gets built with GCC because building with Clang itself
    ;; fails (missing <atomic>, even when libcxx is added as an input.)
    (arguments
     '(#:configure-flags '("-DLIBOMP_USE_HWLOC=ON"
                           "-DOPENMP_TEST_C_COMPILER=clang"
                           "-DOPENMP_TEST_CXX_COMPILER=clang++")
       #:test-target "check-libomp"))
    (native-inputs
     `(("clang" ,clang)
       ("llvm" ,llvm)
       ("perl" ,perl)
       ("pkg-config" ,pkg-config)))
    (inputs
     `(("hwloc" ,hwloc "lib")))
    (home-page "https://openmp.llvm.org")
    (synopsis "OpenMP run-time support library")
    (description
     "This package provides the run-time support library developed by the LLVM
project for the OpenMP multi-theaded programming extension.  This package
notably provides @file{libgomp.so}, which is has a binary interface compatible
with that of libgomp, the GNU Offloading and Multi Processing Library.")
    (license license:expat)))

(define-public python-llvmlite
  (package
    (name "python-llvmlite")
    (version "0.34.0")
    (source
     (origin
       (method url-fetch)
       (uri (pypi-uri "llvmlite" version))
       (sha256
        (base32
         "0qqzs6h34002ig2jn31vk08q9hh5kn84lhmv4bljz3yakg8y0gph"))))
    (build-system python-build-system)
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'patch-reference-to-llvmlite.so
           ;; ctypes.CDLL uses dlopen to load libllvmlite.so, which
           ;; fails, so locate it by its absolute path.  Change it in
           ;; ffi.py, not utils.py, because setup.py relies on the
           ;; output of get_library_name for proper installation.
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (libllvmlite.so (string-append out "/lib/python"
                                                   ,(version-major+minor
                                                     (package-version python))
                                                   "/site-packages/llvmlite/"
                                                   "binding/libllvmlite.so")))
               (substitute* "llvmlite/binding/ffi.py"
                 (("_lib_name = get_library_name\\(\\)")
                  (format #f "_lib_name = ~s" libllvmlite.so)))
               #t)))
         (add-after 'unpack 'skip-failing-tests
           (lambda _
             (substitute* "llvmlite/tests/test_binding.py"
               (("    def test_libm\\(self\\).*" all)
                (string-append "    @unittest.skip('Fails on Guix')\n" all)))
             #t))
         (add-before 'build 'set-compiler/linker-flags
           (lambda* (#:key inputs #:allow-other-keys)
             (let ((llvm (assoc-ref inputs "llvm")))
               ;; Refer to ffi/Makefile.linux.
               (setenv "CPPFLAGS" "-fPIC")
               (setenv "LDFLAGS" (string-append "-Wl,-rpath="
                                                llvm "/lib"))
               #t))))))
    (inputs
     `(("llvm"
        ,(let* ((patches-commit "061ab39e1d4591f3aa842458252a19ad01858167")
                (patch-uri (lambda (name)
                             (string-append
                              "https://raw.githubusercontent.com/numba/"
                              "llvmlite/" patches-commit "/conda-recipes/"
                              name)))
                (patch-origin (lambda (name hash)
                                (origin
                                  (method url-fetch)
                                  (uri (patch-uri name))
                                  (sha256 (base32 hash)))))
                (arch-independent-patches
                 (list
                  (patch-origin
                   "partial-testing.patch"
                   "1cwy4jsmijd838q0bylxl77vrwrb7ksijfly5062ay32303jmj86")
                  (patch-origin
                   "0001-Revert-Limit-size-of-non-GlobalValue-name.patch"
                   "0n4k7za0smx6qwdipsh6x5lm7bfvzzb3p9r8q1zq1dqi4na21295"))))
           (if (string=? "aarch64-linux" (%current-system))
               (package
                 (inherit llvm-9)
                 (source
                  (origin
                    (inherit (package-source llvm-9))
                    (patches
                     `(,(patch-origin
                         "intel-D47188-svml-VF_LLVM9.patch"
                         "1f9ld7wc8bn4gbvdsmk07w1rq371h42vy05rxsq9a22f57rljqbd")
                       ,@arch-independent-patches
                       ,@(origin-patches (package-source llvm-9)))))))
               (package
                 (inherit llvm-10)
                 (source
                  (origin
                    (inherit (package-source llvm-10))
                    (patches
                     `(,(patch-origin
                         "intel-D47188-svml-VF.patch"
                         "0n46qjwfl7i12bl7wp0cyxl277axfvaaz5lxx5kdlgwjcpa582dg")
                       ,(patch-origin
                         "expect-fastmath-entrypoints-in-add-TLI-mappings.ll.patch"
                         "0jxhjkkwwi1cy898l2n57l73ckpw0v73lqnrifp7r1mwpsh624nv")
                       ,@arch-independent-patches
                       ,@(origin-patches (package-source llvm-10))))))))))))
    (home-page "https://llvmlite.pydata.org")
    (synopsis "Wrapper around basic LLVM functionality")
    (description
     "This package provides a Python binding to LLVM for use in Numba.")
    (license license:bsd-3)))

(define-public (clang-python-bindings clang)
  "Return a package for the Python bindings of CLANG."
  (package
    (inherit clang)
    (name "python-clang")
    (build-system python-build-system)
    (outputs '("out"))
    (arguments
     '(#:phases (modify-phases %standard-phases
                  (add-before 'build 'change-directory
                    (lambda _
                      (chdir "bindings/python")))
                  (add-before 'build 'create-setup-py
                    (lambda _
                      ;; Generate a basic "setup.py", enough so it can be
                      ;; built and installed.
                      (with-output-to-file "setup.py"
                        (lambda ()
                          (display "from setuptools import setup
setup(name=\"clang\", packages=[\"clang\"])\n")))))
                  (add-before 'build 'set-libclang-file-name
                    (lambda* (#:key inputs #:allow-other-keys)
                      ;; Record the absolute file name of libclang.so.
                      (let ((clang (assoc-ref inputs "clang")))
                        (substitute* "clang/cindex.py"
                          (("libclang\\.so")
                           (string-append clang "/lib/libclang.so")))))))))
    (inputs `(("clang" ,clang)))
    (synopsis "Python bindings to libclang")))

(define-public python-clang-10
  (clang-python-bindings clang-10))

(define-public python-clang-11
  (clang-python-bindings clang-11))

(define-public python-clang-12
  (clang-python-bindings clang-12))

(define-public emacs-clang-format
  (package
    (inherit clang)
    (name "emacs-clang-format")
    (build-system emacs-build-system)
    (inputs
     `(("clang" ,clang)))
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'configure
           (lambda* (#:key inputs #:allow-other-keys)
             (let ((clang (assoc-ref inputs "clang")))
               (copy-file "tools/clang-format/clang-format.el" "clang-format.el")
               (emacs-substitute-variables "clang-format.el"
                 ("clang-format-executable"
                  (string-append clang "/bin/clang-format"))))
             #t)))))
    (synopsis "Format code using clang-format")
    (description "This package filters code through @code{clang-format}
to fix its formatting.  @code{clang-format} is a tool that formats
C/C++/Obj-C code according to a set of style options, see
@url{https://clang.llvm.org/docs/ClangFormatStyleOptions.html}.")))

(define-public emacs-clang-rename
  (package
    (inherit clang)
    (name "emacs-clang-rename")
    (build-system emacs-build-system)
    (inputs
     `(("clang" ,clang)))
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'configure
           (lambda* (#:key inputs #:allow-other-keys)
             (let ((clang (assoc-ref inputs "clang")))
               (copy-file "tools/clang-rename/clang-rename.el" "clang-rename.el")
               (emacs-substitute-variables "clang-rename.el"
                 ("clang-rename-binary"
                  (string-append clang "/bin/clang-rename"))))
             #t)))))
    (synopsis "Rename every occurrence of a symbol using clang-rename")
    (description "This package renames every occurrence of a symbol at point
using @code{clang-rename}.")))

(define make-ocaml-llvm
  ;; Make it a memoizing procedure so its callers below don't end up defining
  ;; two equal-but-not-eq "ocaml-llvm" packages for the default LLVM.
  (mlambdaq (llvm)
    (package
      (inherit llvm)
      (name "ocaml-llvm")
      (outputs '("out"))
      (arguments
       `(#:configure-flags
         (list
          (string-append "-DLLVM_OCAML_EXTERNAL_LLVM_LIBDIR="
                         (assoc-ref %build-inputs "llvm") "/lib")
          "-DBUILD_SHARED_LIBS=TRUE"
          "-DLLVM_OCAML_OUT_OF_TREE=TRUE"
          (string-append "-DLLVM_OCAML_INSTALL_PATH="
                         (assoc-ref %outputs "out") "/lib/ocaml/site-lib"))
         #:phases
         (modify-phases %standard-phases
           (replace 'build
             (lambda _
               (invoke "make" "ocaml_all")))
           (replace 'install
             (lambda _
               (invoke "cmake" "-P" "bindings/ocaml/cmake_install.cmake"))))))
      (inputs
       `(("llvm" ,llvm)))
      (native-inputs
       `(("ocaml" ,ocaml)
         ("ocaml-findlib" ,ocaml-findlib)
         ("ocaml-ounit" ,ocaml-ounit)
         ("python" ,python)))
      (propagated-inputs
       `(("ocaml-integers" ,ocaml-integers)
         ("ocaml-ctypes" ,ocaml-ctypes)))
      (synopsis "OCaml bindings to LLVM")
      (description "This package contains the OCaml bindings distributed with
LLVM."))))

(define-public ocaml-llvm (make-ocaml-llvm llvm))
(define-public ocaml-llvm-9 (make-ocaml-llvm llvm-9))
(define-public ocaml-llvm-10 (make-ocaml-llvm llvm-10))
(define-public ocaml-llvm-11 (make-ocaml-llvm llvm-11))