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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2015, 2016, 2018, 2020 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2019, 2021 Marius Bakke <marius@gnu.org>
;;; Copyright © 2023 Janneke Nieuwenhuizen <janneke@gnu.org>
;;;
;;; 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 adns)
  #:use-module (guix gexp)
  #:use-module (guix licenses)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix utils)
  #:use-module (guix build-system cmake)
  #:use-module (guix build-system gnu)
  #:use-module (gnu packages m4)
  #:use-module (gnu packages pkg-config))

(define-public adns
  (package
    (name "adns")
    (version "1.6.1")
    (source (origin
              (method url-fetch)
              (uri (list (string-append "mirror://gnu/adns/adns-"
                                        version ".tar.gz")
                         (string-append
                           "https://www.chiark.greenend.org.uk/~ian/adns/ftp/adns-"
                           version ".tar.gz")))
              (sha256
               (base32
                "1k81sjf0yzv6xj35vcxp0ccajxrhhmyly7a57xlbs1kmkdwb6f3i"))))
    (build-system gnu-build-system)
    (arguments
     ;; Make sure the programs under bin/ fine libadns.so.
     '(#:configure-flags (list (string-append "LDFLAGS=-Wl,-rpath -Wl,"
                                              (assoc-ref %outputs "out")
                                              "/lib"))

       ;; XXX: Tests expect real name resolution to work.
       #:tests? #f))
    (native-inputs
     (list m4))
    (home-page "https://www.gnu.org/software/adns/")
    (synopsis "Asynchronous DNS client library and utilities")
    (description
     "GNU adns is a C library that provides easy-to-use DNS resolution
functionality.  The library is asynchronous, allowing several concurrent
calls.  The package also includes several command-line utilities for use in
scripts.")
    (license gpl3+)))

(define-public c-ares
  (package
    (name "c-ares")
    (version "1.18.1")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://c-ares.haxx.se/download/" name "-" version
                    ".tar.gz"))
              (sha256
               (base32
                "1kxviskwsaa7dcgscvssxa8ps88pdq7kq4z93gxvz7sam2l54z8s"))))
    (build-system gnu-build-system)
    (arguments
     (list
      #:phases
      #~(modify-phases %standard-phases
          (add-before 'check 'filter-live-tests
            (lambda _
              ;; Filter tests that require internet access.
              (setenv "GTEST_FILTER" "-*.Live*:*.FamilyV4*")))
          #$@(if (system-hurd?)
                 #~((add-after 'unpack 'skip-tests
                      (lambda _
                        (substitute* "test/ares-test-main.cc"
                          (("(^| )main *\\(.*" all)
                           (string-append all "  exit (77);\n")))))
                    (add-after 'filter-live-tests 'filter-hurd-tests
                      (lambda _
                        (setenv "GTEST_FILTER"
                                (string-append
                                 (getenv "GTEST_FILTER")
                                 ":.*Basic/2"
                                 ":.*CancelImmediate/2"
                                 ":.*CancelImmediateGetHostByAddr/2"
                                 ":.*CancelLater/1"
                                 ":.*FamilyUnspecified/2"
                                 ":.*FamilyV6/2"
                                 ":.*GetAddrInfoParallelLookups/1"
                                 ":.*GetHostByAddrDestroy/2"
                                 ":.*GetHostByNameCNAMENoData/2"
                                 ":.*GetHostByNameDestroyAbsolute/2"
                                 ":.*GetHostByNameDestroyRelative/2"
                                 ":.*GetHostByNameParallelLookups/1"
                                 ":.*HostAlias/2"
                                 ":.*HostAliasMissing/2"
                                 ":.*HostAliasMissingFile/2"
                                 ":.*NotImplResponse/2"
                                 ":.*RefusedResponse/2"
                                 ":.*Resend/1"
                                 ":.*RetryWithoutEDNS/2"
                                 ":.*SearchDomains/2"
                                 ":.*SearchDomainsBare/2"
                                 ":.*SearchDomainsServFailOnAAAA/2"
                                 ":.*SearchDomainsWithResentReply/1"
                                 ":.*SearchHighNdots/2"
                                 ":.*SearchNoDataThenFail/2"
                                 ":.*SearchNoDataThenNoDataBare/2"
                                 ":.*SearchNoDataThenSuccess/2"
                                 ":.*ServFailResponse/2"
                                 ":.*SimpleQuery/2"
                                 ":.*SockCallback/2"
                                 ":.*SockConfigureCallback/2"
                                 ":.*SortListV4/2"
                                 ":.*SortListV6/2"
                                 ":.*ThirdServer/2"
                                 ":.*TruncationRetry/1"
                                 ":.*UnspecifiedFamilyCname6A4/2"
                                 ":.*UnspecifiedFamilyV4/2"
                                 ":.*UnspecifiedFamilyV6/2")))))
                 #~()))))
    (native-inputs
     (list pkg-config))
    (home-page "https://c-ares.haxx.se/")
    (synopsis "C library for asynchronous DNS requests")
    (description
     "C-ares is a C library that performs DNS requests and name resolution
asynchronously.  It is intended for applications which need to perform DNS
queries without blocking, or need to perform multiple DNS queries in parallel.
The primary examples of such applications are servers which communicate with
multiple clients and programs with graphical user interfaces.")
    (license (x11-style "https://c-ares.haxx.se/license.html"))))

;; gRPC requires a c-ares built with CMake in order to get the .cmake modules.
;; We can not build c-ares itself with CMake because that would introduce a
;; circular dependency through nghttp2.
;; XXX: It would be nice if we could extract the modules somehow and make them
;; work with the "normal" c-ares package instead of building a whole new library.
(define-public c-ares/cmake
  (hidden-package
   (package
     (inherit c-ares)
     (build-system cmake-build-system)
     (arguments
      `(;; XXX: Tests require name resolution (the normal variant runs no tests).
        #:tests? #f)))))

(define-public c-ares-for-node
  (hidden-package
   (package
     (inherit c-ares)
     (name "c-ares")
     (version "1.18.1")
     (source (origin
               (method url-fetch)
               (uri (string-append
                     "https://c-ares.haxx.se/download/" name "-" version
                     ".tar.gz"))
               (sha256
                (base32
                 "1kxviskwsaa7dcgscvssxa8ps88pdq7kq4z93gxvz7sam2l54z8s"))))
     (arguments
      '(#:phases
        (modify-phases %standard-phases
          (add-before 'check 'filter-live-tests
            (lambda _
              ;; Filter tests that require internet access.
              (setenv "GTEST_FILTER" "-*.Live*:*.FamilyV4*")))))))))
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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 David Craven <david@craven.ch>
;;; Copyright © 2016 Eric Le Bihan <eric.le.bihan.dev@free.fr>
;;; Copyright © 2016 ng0 <ng0@n0.is>
;;; Copyright © 2017 Ben Woodcroft <donttrustben@gmail.com>
;;; Copyright © 2017, 2018 Nikolai Merinov <nikolai.merinov@member.fsf.org>
;;; Copyright © 2017 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2018 Danny Milosavljevic <dannym+a@scratchpost.org>
;;; Copyright © 2019 Ivan Petkov <ivanppetkov@gmail.com>
;;;
;;; 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 rust)
  #:use-module (gnu packages base)
  #:use-module (gnu packages bison)
  #:use-module (gnu packages bootstrap)
  #:use-module (gnu packages cmake)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages curl)
  #:use-module (gnu packages elf)
  #:use-module (gnu packages flex)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages gdb)
  #:use-module (gnu packages jemalloc)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages llvm)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages python)
  #:use-module (gnu packages ssh)
  #:use-module (gnu packages tls)
  #:use-module (gnu packages)
  #:use-module (guix build-system cargo)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system trivial)
  #:use-module (guix download)
  #:use-module (guix git-download)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module ((guix build utils) #:select (alist-replace))
  #:use-module (guix utils)
  #:use-module (ice-9 match)
  #:use-module (srfi srfi-26))

(define %cargo-reference-project-file "/dev/null")
(define %cargo-reference-hash
  "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")

(define* (nix-system->gnu-triplet-for-rust
          #:optional (system (%current-system)))
  (match system
    ("x86_64-linux"   "x86_64-unknown-linux-gnu")
    ("i686-linux"     "i686-unknown-linux-gnu")
    ("armhf-linux"    "armv7-unknown-linux-gnueabihf")
    ("aarch64-linux"  "aarch64-unknown-linux-gnu")
    ("mips64el-linux" "mips64el-unknown-linux-gnuabi64")
    (_                (nix-system->gnu-triplet system))))


(define* (rust-source-pre-1.32 version hash
                               #:key
                               (patches '())
                               (patch-flags '("-p1")))
  (origin
    (method url-fetch)
    (uri (string-append "https://static.rust-lang.org/dist/"
                        "rustc-" version "-src.tar.gz"))
    (sha256 (base32 hash))
    (modules '((guix build utils)))
    (snippet '(begin (delete-file-recursively "src/llvm") #t))
    (patches (map search-patch patches))
    (patch-flags patch-flags)))

(define* (rust-bootstrapped-package-pre-1.32 base-rust version checksum
                                             #:key
                                             (patches '())
                                             (patch-flags '("-p1")))
  "Bootstrap rust VERSION with source checksum CHECKSUM patched with PATCHES using BASE-RUST.
Specific to rust versions before 1.32."
  (package
    (inherit base-rust)
    (version version)
    (source
     (rust-source-pre-1.32 version checksum #:patches patches #:patch-flags patch-flags))
    (native-inputs
     (alist-replace "cargo-bootstrap" (list base-rust "cargo")
                    (alist-replace "rustc-bootstrap" (list base-rust)
                                   (package-native-inputs base-rust))))))

(define* (rust-source version hash
                      #:key
                      (patches '())
                      (patch-flags '("-p1")))
  (origin
    (method url-fetch)
    (uri (string-append "https://static.rust-lang.org/dist/"
                        "rustc-" version "-src.tar.gz"))
    (sha256 (base32 hash))
    (modules '((guix build utils)))
    (snippet '(begin (delete-file-recursively "src/llvm")
                     (delete-file-recursively "vendor/jemalloc-sys/jemalloc")
                     #t))
    (patches (map search-patch patches))
    (patch-flags patch-flags)))

(define* (rust-bootstrapped-package base-rust version checksum
                                    #:key
                                    (patches '())
                                    (patch-flags '("-p1")))
  "Bootstrap rust VERSION with source checksum CHECKSUM patched with PATCHES using BASE-RUST."
  (package
    (inherit base-rust)
    (version version)
    (source
     (rust-source version checksum #:patches patches #:patch-flags patch-flags))
    (native-inputs
     (alist-replace "cargo-bootstrap" (list base-rust "cargo")
                    (alist-replace "rustc-bootstrap" (list base-rust)
                                   (package-native-inputs base-rust))))))

(define-public mrustc
  (let ((rustc-version "1.19.0"))
    (package
      (name "mrustc")
      (version "0.8.0")
      (source (origin
                (method git-fetch)
                (uri (git-reference
                      (url "https://github.com/thepowersgang/mrustc.git")
                      (commit (string-append "v" version))))
                (file-name (git-file-name name version))
                (sha256
                 (base32
                  "0a7v8ccyzp1sdkwni8h1698hxpfz2sxhcpx42n6l2pbm0rbjp08i"))))
      (outputs '("out" "cargo"))
      (build-system gnu-build-system)
      (inputs
       `(("llvm" ,llvm-3.9.1)))
      (native-inputs
       `(("bison" ,bison)
         ("flex" ,flex)
         ;; Required for the libstd sources.
         ("rustc"
          ,(rust-source-pre-1.32 "1.19.0" "0l8c14qsf42rmkqy92ahij4vf356dbyspxcips1aswpvad81y8qm"))))
      (arguments
       `(#:test-target "local_tests"
         #:make-flags (list (string-append "LLVM_CONFIG="
                                           (assoc-ref %build-inputs "llvm")
                                           "/bin/llvm-config"))
         #:phases
         (modify-phases %standard-phases
          (add-after 'unpack 'patch-date
            (lambda _
              (substitute* "Makefile"
               (("shell date") "shell date -d @1"))
              #t))
           (add-after 'patch-date 'unpack-target-compiler
             (lambda* (#:key inputs outputs #:allow-other-keys)
               (substitute* "minicargo.mk"
                 ;; Don't try to build LLVM.
                 (("^[$][(]LLVM_CONFIG[)]:") "xxx:")
                 ;; Build for the correct target architecture.
                 (("^RUSTC_TARGET := x86_64-unknown-linux-gnu")
                  (string-append "RUSTC_TARGET := "
                                 ,(or (%current-target-system)
                                      (nix-system->gnu-triplet-for-rust)))))
               (invoke "tar" "xf" (assoc-ref inputs "rustc"))
               (chdir "rustc-1.19.0-src")
               (invoke "patch" "-p0" "../rust_src.patch")
               (chdir "..")
               #t))
           (replace 'configure
             (lambda* (#:key inputs #:allow-other-keys)
               (setenv "CC" (string-append (assoc-ref inputs "gcc") "/bin/gcc"))
               #t))
           (add-after 'build 'build-minicargo
             (lambda _
               (for-each (lambda (target)
                           (invoke "make" "-f" "minicargo.mk" target))
                         '("output/libstd.hir" "output/libpanic_unwind.hir"
                           "output/libproc_macro.hir" "output/libtest.hir"))
               ;; Technically the above already does it - but we want to be clear.
               (invoke "make" "-C" "tools/minicargo")))
           (replace 'install
             (lambda* (#:key inputs outputs #:allow-other-keys)
               (let* ((out (assoc-ref outputs "out"))
                      (bin (string-append out "/bin"))
                      (tools-bin (string-append out "/tools/bin"))
                      (cargo-out (assoc-ref outputs "cargo"))
                      (cargo-bin (string-append cargo-out "/bin"))
                      (lib (string-append out "/lib"))
                      (lib/rust (string-append lib "/mrust"))
                      (gcc (assoc-ref inputs "gcc")))
                 ;; These files are not reproducible.
                 (for-each delete-file (find-files "output" "\\.txt$"))
                 (delete-file-recursively "output/local_tests")
                 (mkdir-p lib)
                 (copy-recursively "output" lib/rust)
                 (mkdir-p bin)
                 (mkdir-p tools-bin)
                 (install-file "bin/mrustc" bin)
                 ;; minicargo uses relative paths to resolve mrustc.
                 (install-file "tools/bin/minicargo" tools-bin)
                 (install-file "tools/bin/minicargo" cargo-bin)
                 #t))))))
      (synopsis "Compiler for the Rust progamming language")
      (description "Rust is a systems programming language that provides memory
safety and thread safety guarantees.")
      (home-page "https://github.com/thepowersgang/mrustc")
      ;; Dual licensed.
      (license (list license:asl2.0 license:expat)))))

(define rust-1.19
  (package
    (name "rust")
    (version "1.19.0")
    (source (rust-source-pre-1.32 version "0l8c14qsf42rmkqy92ahij4vf356dbyspxcips1aswpvad81y8qm"
            #:patches '("rust-1.19-mrustc.patch")))
    (outputs '("out" "cargo"))
    (properties '((timeout . 72000)               ;20 hours
                  (max-silent-time . 18000)))     ;5 hours (for armel)
    (arguments
     `(#:imported-modules ,%cargo-utils-modules ;for `generate-checksums'
       #:modules ((guix build utils) (ice-9 match) (guix build gnu-build-system))
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'set-env
           (lambda* (#:key inputs #:allow-other-keys)
             ;; Disable test for cross compilation support.
             (setenv "CFG_DISABLE_CROSS_TESTS" "1")
             (setenv "SHELL" (which "sh"))
             (setenv "CONFIG_SHELL" (which "sh"))
             (setenv "CC" (string-append (assoc-ref inputs "gcc") "/bin/gcc"))
             ;; guix llvm-3.9.1 package installs only shared libraries
             (setenv "LLVM_LINK_SHARED" "1")
             #t))
         (add-after 'unpack 'patch-cargo-tomls
           (lambda* (#:key inputs outputs #:allow-other-keys)
             (substitute* "src/librustc_errors/Cargo.toml"
               (("[[]dependencies[]]") "
[dependencies]
term = \"0.4.4\"
"))
             (substitute* "src/librustc/Cargo.toml"
               (("[[]dependencies[]]") "
[dependencies]
getopts = { path = \"../libgetopts\" }
"))
             (substitute* "src/librustdoc/Cargo.toml"
               (("[[]dependencies[]]") "
[dependencies]
test = { path = \"../libtest\" }
"))
             #t))
         (add-after 'unpack 'patch-tests
           (lambda* (#:key inputs #:allow-other-keys)
             (let ((bash (assoc-ref inputs "bash")))
               (substitute* "src/libstd/process.rs"
                 ;; The newline is intentional.
                 ;; There's a line length "tidy" check in Rust which would
                 ;; fail otherwise.
                 (("\"/bin/sh\"") (string-append "\n\"" bash "/bin/sh\"")))
               (substitute* "src/libstd/net/tcp.rs"
                 ;; There is no network in build environment
                 (("fn connect_timeout_unroutable")
                  "#[ignore]\nfn connect_timeout_unroutable"))
               ;; <https://lists.gnu.org/archive/html/guix-devel/2017-06/msg00222.html>
               (substitute* "src/libstd/sys/unix/process/process_common.rs"
                (("fn test_process_mask") "#[allow(unused_attributes)]
    #[ignore]
    fn test_process_mask"))
               #t)))
         (add-after 'patch-tests 'patch-aarch64-test
           (lambda* _
             (substitute* "src/librustc_back/dynamic_lib.rs"
               ;; This test is known to fail on aarch64 and powerpc64le:
               ;; https://github.com/rust-lang/rust/issues/45410
               (("fn test_loading_cosine") "#[ignore]\nfn test_loading_cosine"))
             #t))
         (add-after 'patch-tests 'use-readelf-for-tests
           (lambda* _
             ;; nm doesn't recognize the file format because of the
             ;; nonstandard sections used by the Rust compiler, but readelf
             ;; ignores them.
             (substitute* "src/test/run-make/atomic-lock-free/Makefile"
               (("\tnm ")
                "\treadelf -c "))
             #t))
         (add-after 'patch-tests 'remove-unsupported-tests
           (lambda* _
             ;; Our ld-wrapper cannot process non-UTF8 bytes in LIBRARY_PATH.
             ;; <https://lists.gnu.org/archive/html/guix-devel/2017-06/msg00193.html>
             (delete-file-recursively "src/test/run-make/linker-output-non-utf8")
             #t))
         (add-after 'patch-source-shebangs 'patch-cargo-checksums
           (lambda* _
             (substitute* "src/Cargo.lock"
               (("(\"checksum .* = )\".*\"" all name)
                (string-append name "\"" ,%cargo-reference-hash "\"")))
             (for-each
              (lambda (filename)
                (use-modules (guix build cargo-utils))
                (delete-file filename)
                (let* ((dir (dirname filename)))
                  (display (string-append
                            "patch-cargo-checksums: generate-checksums for "
                            dir "\n"))
                  (generate-checksums dir ,%cargo-reference-project-file)))
              (find-files "src/vendor" ".cargo-checksum.json"))
             #t))
         ;; This phase is overridden by newer versions.
         (replace 'configure
           (const #t))
         ;; This phase is overridden by newer versions.
         (replace 'build
           (lambda* (#:key inputs outputs #:allow-other-keys)
             (let ((rustc-bootstrap (assoc-ref inputs "rustc-bootstrap")))
               (setenv "CFG_COMPILER_HOST_TRIPLE"
                ,(nix-system->gnu-triplet (%current-system)))
               (setenv "CFG_RELEASE" "")
               (setenv "CFG_RELEASE_CHANNEL" "stable")
               (setenv "CFG_LIBDIR_RELATIVE" "lib")
               (setenv "CFG_VERSION" "1.19.0-stable-mrustc")
               ; bad: (setenv "CFG_PREFIX" "mrustc") ; FIXME output path.
               (mkdir-p "output")
               (invoke (string-append rustc-bootstrap "/tools/bin/minicargo")
                       "src/rustc" "--vendor-dir" "src/vendor"
                       "--output-dir" "output/rustc-build"
                       "-L" (string-append rustc-bootstrap "/lib/mrust")
                       "-j" "1")
               (setenv "CFG_COMPILER_HOST_TRIPLE" #f)
               (setenv "CFG_RELEASE" #f)
               (setenv "CFG_RELEASE_CHANNEL" #f)
               (setenv "CFG_VERSION" #f)
               (setenv "CFG_PREFIX" #f)
               (setenv "CFG_LIBDIR_RELATIVE" #f)
               (invoke (string-append rustc-bootstrap "/tools/bin/minicargo")
                       "src/tools/cargo" "--vendor-dir" "src/vendor"
                       "--output-dir" "output/cargo-build"
                       "-L" "output/"
                       "-L" (string-append rustc-bootstrap "/lib/mrust")
                       "-j" "1")
               ;; Now use the newly-built rustc to build the libraries.
               ;; One day that could be replaced by:
               ;; (invoke "output/cargo-build/cargo" "build"
               ;;         "--manifest-path" "src/bootstrap/Cargo.toml"
               ;;         "--verbose") ; "--locked" "--frozen"
               ;; but right now, Cargo has problems with libstd's circular
               ;; dependencies.
               (mkdir-p "output/target-libs")
               (for-each (match-lambda
                          ((name . flags)
                            (write name)
                            (newline)
                            (apply invoke
                                   "output/rustc-build/rustc"
                                   "-C" (string-append "linker="
                                                       (getenv "CC"))
                                   ;; Required for libterm.
                                   "-Z" "force-unstable-if-unmarked"
                                   "-L" "output/target-libs"
                                   (string-append "src/" name "/lib.rs")
                                   "-o"
                                   (string-append "output/target-libs/"
                                                  (car (string-split name #\/))
                                                  ".rlib")
                                   flags)))
                         '(("libcore")
                           ("libstd_unicode")
                           ("liballoc")
                           ("libcollections")
                           ("librand")
                           ("liblibc/src" "--cfg" "stdbuild")
                           ("libunwind" "-l" "gcc_s")
                           ("libcompiler_builtins")
                           ("liballoc_system")
                           ("libpanic_unwind")
                           ;; Uses "cc" to link.
                           ("libstd" "-l" "dl" "-l" "rt" "-l" "pthread")
                           ("libarena")

                           ;; Test dependencies:

                           ("libgetopts")
                           ("libterm")
                           ("libtest")))
               #t)))
         ;; This phase is overridden by newer versions.
         (replace 'check
           (const #t))
         ;; This phase is overridden by newer versions.
         (replace 'install
           (lambda* (#:key inputs outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (target-system ,(or (%current-target-system)
                                        (nix-system->gnu-triplet
                                         (%current-system))))
                    (out-libs (string-append out "/lib/rustlib/"
                                             target-system "/lib")))
                                        ;(setenv "CFG_PREFIX" out)
               (mkdir-p out-libs)
               (copy-recursively "output/target-libs" out-libs)
               (install-file "output/rustc-build/rustc"
                             (string-append out "/bin"))
               (install-file "output/rustc-build/rustdoc"
                             (string-append out "/bin"))
               (install-file "output/cargo-build/cargo"
                             (string-append (assoc-ref outputs "cargo")
                                            "/bin")))
             #t)))))
    (build-system gnu-build-system)
    (native-inputs
     `(("bison" ,bison) ; For the tests
       ("cmake" ,cmake)
       ("flex" ,flex) ; For the tests
       ("gdb" ,gdb)   ; For the tests
       ("procps" ,procps) ; For the tests
       ("python-2" ,python-2)
       ("rustc-bootstrap" ,mrustc)
       ("cargo-bootstrap" ,mrustc "cargo")
       ("pkg-config" ,pkg-config) ; For "cargo"
       ("which" ,which)))
    (inputs
     `(("jemalloc" ,jemalloc-4.5.0)
       ("llvm" ,llvm-3.9.1)
       ("openssl" ,openssl)
       ("libssh2" ,libssh2) ; For "cargo"
       ("libcurl" ,curl)))  ; For "cargo"

    ;; rustc invokes gcc, so we need to set its search paths accordingly.
    ;; Note: duplicate its value here to cope with circular dependencies among
    ;; modules (see <https://bugs.gnu.org/31392>).
    (native-search-paths
     (list (search-path-specification
            (variable "C_INCLUDE_PATH")
            (files '("include")))
           (search-path-specification
            (variable "CPLUS_INCLUDE_PATH")
            (files '("include")))
           (search-path-specification
            (variable "LIBRARY_PATH")
            (files '("lib" "lib64")))))

    (synopsis "Compiler for the Rust progamming language")
    (description "Rust is a systems programming language that provides memory
safety and thread safety guarantees.")
    (home-page "https://www.rust-lang.org")
    ;; Dual licensed.
    (license (list license:asl2.0 license:expat))))

(define-public rust-1.20
  (let ((base-rust
         (rust-bootstrapped-package-pre-1.32 rust-1.19 "1.20.0"
          "0542y4rnzlsrricai130mqyxl8r6rd991frb4qsnwb27yigqg91a")))
    (package
      (inherit base-rust)
      (outputs '("out" "doc" "cargo"))
      ;; Since rust-1.19 is local, it's quite probable that Hydra
      ;; will build rust-1.19 only as a dependency of rust-1.20.
      ;; But then Hydra will use the wrong properties, the ones here,
      ;; for rust-1.19.  Therefore, we copied the properties of
      ;; rust-1.19 here.
      (properties '((timeout . 72000)               ;20 hours
                    (max-silent-time . 18000)))     ;5 hours (for armel)
      (arguments
       (substitute-keyword-arguments (package-arguments rust-1.19)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'patch-tests 'patch-cargo-tests
               (lambda _
                 (substitute* "src/tools/cargo/tests/build.rs"
                  (("/usr/bin/env") (which "env"))
                  ;; Guix llvm is compiled without asmjs-unknown-emscripten.
                  (("fn wasm32_final_outputs") "#[ignore]\nfn wasm32_final_outputs"))
                 (substitute* "src/tools/cargo/tests/death.rs"
                  ;; This is stuck when built in container.
                  (("fn ctrl_c_kills_everyone") "#[ignore]\nfn ctrl_c_kills_everyone"))
                 ;; Prints test output in the wrong order when built on
                 ;; i686-linux.
                 (substitute* "src/tools/cargo/tests/test.rs"
                   (("fn cargo_test_env") "#[ignore]\nfn cargo_test_env"))

                 ;; These tests pull in a dependency on "git", which changes
                 ;; too frequently take part in the Rust toolchain.
                 (substitute* "src/tools/cargo/tests/new.rs"
                   (("fn author_prefers_cargo") "#[ignore]\nfn author_prefers_cargo")
                   (("fn finds_author_git") "#[ignore]\nfn finds_author_git")
                   (("fn finds_local_author_git") "#[ignore]\nfn finds_local_author_git"))
                 #t))
             (add-after 'patch-cargo-tests 'ignore-glibc-2.27-incompatible-test
               ;; https://github.com/rust-lang/rust/issues/47863
               (lambda _
                 (substitute* "src/test/run-pass/out-of-stack.rs"
                   (("// ignore-android") "// ignore-test\n// ignore-android"))
                 #t))
             (replace 'configure
               (lambda* (#:key inputs outputs #:allow-other-keys)
                 (let* ((out (assoc-ref outputs "out"))
                        (doc (assoc-ref outputs "doc"))
                        (gcc (assoc-ref inputs "gcc"))
                        (gdb (assoc-ref inputs "gdb"))
                        (binutils (assoc-ref inputs "binutils"))
                        (python (assoc-ref inputs "python-2"))
                        (rustc (assoc-ref inputs "rustc-bootstrap"))
                        (cargo (assoc-ref inputs "cargo-bootstrap"))
                        (llvm (assoc-ref inputs "llvm"))
                        (jemalloc (assoc-ref inputs "jemalloc")))
                   (call-with-output-file "config.toml"
                     (lambda (port)
                       (display (string-append "
[llvm]
[build]
cargo = \"" cargo "/bin/cargo" "\"
rustc = \"" rustc "/bin/rustc" "\"
docs = true
python = \"" python "/bin/python2" "\"
gdb = \"" gdb "/bin/gdb" "\"
vendor = true
submodules = false
[install]
prefix = \"" out "\"
docdir = \"" doc "/share/doc/rust" "\"
sysconfdir = \"etc\"
[rust]
default-linker = \"" gcc "/bin/gcc" "\"
channel = \"stable\"
rpath = true
" ;; There are 2 failed codegen tests:
;; codegen/mainsubprogram.rs and codegen/mainsubprogramstart.rs
;; These tests require a patched LLVM
"codegen-tests = false
[target." ,(nix-system->gnu-triplet-for-rust) "]
llvm-config = \"" llvm "/bin/llvm-config" "\"
cc = \"" gcc "/bin/gcc" "\"
cxx = \"" gcc "/bin/g++" "\"
ar = \"" binutils "/bin/ar" "\"
jemalloc = \"" jemalloc "/lib/libjemalloc_pic.a" "\"
[dist]
") port)))
                   #t)))
             (add-after 'configure 'provide-cc
               (lambda* (#:key inputs #:allow-other-keys)
                 (symlink (string-append (assoc-ref inputs "gcc") "/bin/gcc")
                          "/tmp/cc")
                 (setenv "PATH" (string-append "/tmp:" (getenv "PATH")))
                 #t))
             (add-after 'provide-cc 'configure-archiver
               (lambda* (#:key inputs #:allow-other-keys)
                 (substitute* "src/build_helper/lib.rs"
                  ;; Make sure "ar" is always used as the archiver.
                  (("\"musl\"") "\"\"")
                  ;; Then substitute "ar" by our name.
                  (("\"ar\"") (string-append "\""
                               (assoc-ref inputs "binutils")
                               "/bin/ar\"")))
                 #t))
             (delete 'patch-cargo-tomls)
             (add-before 'build 'reset-timestamps-after-changes
               (lambda* _
                 (for-each
                  (lambda (filename)
                    ;; Rust 1.20.0 treats timestamp 0 as "file doesn't exist".
                    ;; Therefore, use timestamp 1.
                    (utime filename 1 1 1 1))
                  (find-files "." #:directories? #t))
                 #t))
             (replace 'build
               (lambda* _
                 (invoke "./x.py" "build")
                 (invoke "./x.py" "build" "src/tools/cargo")))
             (replace 'check
               (lambda* _
                 ;; Disable parallel execution to prevent EAGAIN errors when
                 ;; running tests.
                 (invoke "./x.py" "-j1" "test" "-vv")
                 (invoke "./x.py" "-j1" "test" "src/tools/cargo")
                 #t))
             (replace 'install
               (lambda* (#:key outputs #:allow-other-keys)
                 (invoke "./x.py" "install")
                 (substitute* "config.toml"
                   ;; replace prefix to specific output
                   (("prefix = \"[^\"]*\"")
                    (string-append "prefix = \"" (assoc-ref outputs "cargo") "\"")))
                 (invoke "./x.py" "install" "cargo")))
             (add-after 'install 'wrap-rustc
               (lambda* (#:key inputs outputs #:allow-other-keys)
                 (let ((out (assoc-ref outputs "out"))
                       (libc (assoc-ref inputs "libc"))
                       (ld-wrapper (assoc-ref inputs "ld-wrapper")))
                   ;; Let gcc find ld and libc startup files.
                   (wrap-program (string-append out "/bin/rustc")
                     `("PATH" ":" prefix (,(string-append ld-wrapper "/bin")))
                     `("LIBRARY_PATH" ":" suffix (,(string-append libc "/lib"))))
                   #t))))))))))

(define-public rust-1.21
  (let ((base-rust (rust-bootstrapped-package-pre-1.32 rust-1.20 "1.21.0"
                    "1yj8lnxybjrybp00fqhxw8fpr641dh8wcn9mk44xjnsb4i1c21qp")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'configure 'remove-ar
               (lambda* (#:key inputs #:allow-other-keys)
                 ;; Remove because toml complains about "unknown field".
                 (substitute* "config.toml"
                  (("^ar =.*") "\n"))
                 #t)))))))))

(define-public rust-1.22
  (let ((base-rust (rust-bootstrapped-package-pre-1.32 rust-1.21 "1.22.1"
                    "1lrzzp0nh7s61wgfs2h6ilaqi6iq89f1pd1yaf65l87bssyl4ylb")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'unpack 'remove-flaky-test
               (lambda _
                 ;; See <https://github.com/rust-lang/rust/issues/43402>.
                 (when (file-exists? "src/test/run-make/issue-26092")
                   (delete-file-recursively "src/test/run-make/issue-26092"))
                 #t)))))))))

(define-public rust-1.23
  (let ((base-rust (rust-bootstrapped-package-pre-1.32 rust-1.22 "1.23.0"
                    "14fb8vhjzsxlbi6yrn1r6fl5dlbdd1m92dn5zj5gmzfwf4w9ar3l")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (delete 'configure-archiver)
             (delete 'remove-ar)
             (add-after 'unpack 'dont-build-native
               (lambda _
                 ;; XXX: Revisit this when we use gcc 6.
                 (substitute* "src/binaryen/CMakeLists.txt"
                  (("ADD_COMPILE_FLAG\\(\\\"-march=native\\\"\\)") ""))
                 #t)))))))))

(define-public rust-1.24
  (let ((base-rust
         (rust-bootstrapped-package-pre-1.32 rust-1.23 "1.24.1"
          "1vv10x2h9kq7fxh2v01damdq8pvlp5acyh1kzcda9sfjx12kv99y")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (delete 'use-readelf-for-tests)
             (replace 'patch-aarch64-test
               (lambda* _
                 (substitute* "src/librustc_metadata/dynamic_lib.rs"
                   ;; This test is known to fail on aarch64 and powerpc64le:
                   ;; https://github.com/rust-lang/rust/issues/45410
                   (("fn test_loading_cosine") "#[ignore]\nfn test_loading_cosine"))
                 #t)))))))))

;;; Rust 1.25 release support work with llvm 6--but build with llvm 6 is
;;; not determenistic due to <https://github.com/rust-lang/rust/issues/50556>.
;;; Keep using llvm 3.9.1 until builds become determenistic
(define-public rust-1.25
  (let ((base-rust
         (rust-bootstrapped-package-pre-1.32 rust-1.24 "1.25.0"
          "0baxjr99311lvwdq0s38bipbnj72pn6fgbk6lcq7j555xq53mxpf"
          #:patches '("rust-1.25-accept-more-detailed-gdb-lines.patch"))))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'patch-cargo-tests 'patch-cargo-index-update
               (lambda _
                 (substitute* "src/tools/cargo/tests/generate-lockfile.rs"
                   ;; This test wants to update the crate index.
                   (("fn no_index_update") "#[ignore]\nfn no_index_update"))
                 #t))
             (replace 'patch-aarch64-test
               (lambda _
                 (substitute* "src/librustc_metadata/dynamic_lib.rs"
                   ;; This test is known to fail on aarch64 and powerpc64le:
                   ;; https://github.com/rust-lang/rust/issues/45410
                   (("fn test_loading_cosine") "#[ignore]\nfn test_loading_cosine"))
                 ;; This test fails on aarch64 with llvm@6.0:
                 ;; https://github.com/rust-lang/rust/issues/49807
                 ;; other possible solution:
                 ;; https://github.com/rust-lang/rust/pull/47688
                 (delete-file "src/test/debuginfo/by-value-self-argument-in-trait-impl.rs")
                 #t))
             (delete 'ignore-glibc-2.27-incompatible-test))))))))

(define-public rust-1.26
  (let ((base-rust
         (rust-bootstrapped-package-pre-1.32 rust-1.25 "1.26.2"
          "0047ais0fvmqvngqkdsxgrzhb0kljg8wy85b01kbbjc88hqcz7pv"
          #:patches '("rust-coresimd-doctest.patch"
                      "rust-1.25-accept-more-detailed-gdb-lines.patch"))))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             ;; binaryen was replaced with LLD project from LLVM
             (delete 'dont-build-native)
             (replace 'remove-unsupported-tests
               (lambda* _
                 ;; Our ld-wrapper cannot process non-UTF8 bytes in LIBRARY_PATH.
                 ;; <https://lists.gnu.org/archive/html/guix-devel/2017-06/msg00193.html>
                 (delete-file-recursively "src/test/run-make-fulldeps/linker-output-non-utf8")
                 #t))
             (replace 'patch-cargo-tests
               (lambda* _
                 (substitute* "src/tools/cargo/tests/testsuite/build.rs"
                   (("/usr/bin/env") (which "env"))
                   ;; Guix llvm is compiled without asmjs-unknown-emscripten.
                   (("fn wasm32_final_outputs") "#[ignore]\nfn wasm32_final_outputs"))
                 (substitute* "src/tools/cargo/tests/testsuite/death.rs"
                   ;; This is stuck when built in container.
                   (("fn ctrl_c_kills_everyone") "#[ignore]\nfn ctrl_c_kills_everyone"))
                 ;; Prints test output in the wrong order when built on
                 ;; i686-linux.
                 (substitute* "src/tools/cargo/tests/testsuite/test.rs"
                   (("fn cargo_test_env") "#[ignore]\nfn cargo_test_env"))

                 ;; Avoid dependency on "git".
                 (substitute* "src/tools/cargo/tests/testsuite/new.rs"
                   (("fn author_prefers_cargo") "#[ignore]\nfn author_prefers_cargo")
                   (("fn finds_author_git") "#[ignore]\nfn finds_author_git")
                   (("fn finds_local_author_git") "#[ignore]\nfn finds_local_author_git"))
                 #t))
             (add-after 'patch-cargo-tests 'disable-cargo-test-for-nightly-channel
               (lambda* _
                 ;; This test failed to work on "nightly" channel builds
                 ;; https://github.com/rust-lang/cargo/issues/5648
                 (substitute* "src/tools/cargo/tests/testsuite/resolve.rs"
                   (("fn test_resolving_minimum_version_with_transitive_deps")
                    "#[ignore]\nfn test_resolving_minimum_version_with_transitive_deps"))
                 #t))
             (replace 'patch-cargo-index-update
               (lambda* _
                 (substitute* "src/tools/cargo/tests/testsuite/generate_lockfile.rs"
                   ;; This test wants to update the crate index.
                   (("fn no_index_update") "#[ignore]\nfn no_index_update"))
                 #t)))))))))

(define-public rust-1.27
  (let ((base-rust
         (rust-bootstrapped-package-pre-1.32 rust-1.26 "1.27.2"
          "0pg1s37bhx9zqbynxyydq5j6q7kij9vxkcv8maz0m25prm88r0cs"
          #:patches
          '("rust-coresimd-doctest.patch"
            "rust-bootstrap-stage0-test.patch"
            "rust-1.25-accept-more-detailed-gdb-lines.patch"
            "rust-reproducible-builds.patch"))))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-before 'install 'mkdir-prefix-paths
               (lambda* (#:key outputs #:allow-other-keys)
                 ;; As result of https://github.com/rust-lang/rust/issues/36989
                 ;; `prefix' directory should exist before `install' call
                 (mkdir-p (assoc-ref outputs "out"))
                 (mkdir-p (assoc-ref outputs "cargo"))
                 #t))
             (add-after 'patch-cargo-tests 'disable-thinlto-test
               (lambda* _
                 ;; thinlto required llvm 6.0 for work
                 (substitute* "src/tools/cargo/tests/testsuite/path.rs"
                   (("fn thin_lto_works") "#[ignore]\nfn thin_lto_works"))
                 #t)))))))))

(define-public rust-1.28
  (let ((base-rust
         (rust-bootstrapped-package-pre-1.32 rust-1.27 "1.28.0"
          "11k4rn77bca2rikykkk9fmprrgjswd4x4kaq7fia08vgkir82nhx"
          #:patches
          '("rust-coresimd-doctest.patch"
            "rust-bootstrap-stage0-test.patch"
            "rust-1.25-accept-more-detailed-gdb-lines.patch"
            "rust-reproducible-builds.patch"))))
    (package
      (inherit base-rust)
      (inputs
       ;; Use LLVM 6.0
       (alist-replace "llvm" (list llvm-6)
                      (package-inputs base-rust)))
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'configure 'enable-codegen-tests
               ;; Codegen tests should pass with llvm 6, so enable them.
               (lambda* _
                 (substitute* "config.toml"
                   (("codegen-tests = false") ""))
                 #t))
             (add-after 'patch-tests 'disable-amd64-avx-test
               ;; That test would fail on x86_64 machines without avx.
               (lambda* _
                 (substitute* "src/test/run-pass/issue-44056.rs"
                   (("only-x86_64") "ignore-test"))
                 #t))
             ;; The thinlto test should pass with llvm 6.
             (delete 'disable-thinlto-test))))))))

(define-public rust-1.29
  (let ((base-rust
         (rust-bootstrapped-package-pre-1.32 rust-1.28 "1.29.2"
          "1jb787080z754caa2w3w1amsygs4qlzj9rs1vy64firfmabfg22h"
          #:patches
          '("rust-1.25-accept-more-detailed-gdb-lines.patch"
            "rust-reproducible-builds.patch"))))
    (package
      (inherit base-rust))))

(define-public rust-1.30
  (let ((base-rust
         (rust-bootstrapped-package-pre-1.32 rust-1.29 "1.30.1"
          "0aavdc1lqv0cjzbqwl5n59yd0bqdlhn0zas61ljf38yrvc18k8rn"
          #:patches
          '("rust-1.25-accept-more-detailed-gdb-lines.patch"
            "rust-1.30-gdb-llvm.patch"
            "rust-reproducible-builds.patch"))))
    (package
      (inherit base-rust)
      (inputs
       ;; Use LLVM 7.0
       (alist-replace "llvm" (list llvm)
                      (package-inputs base-rust)))
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'patch-cargo-tests 'patch-cargo-env-shebang
               (lambda* (#:key inputs #:allow-other-keys)
                 (let ((coreutils (assoc-ref inputs "coreutils")))
                   (substitute* "src/tools/cargo/tests/testsuite/fix.rs"
                     ;; Cargo has a test which explicitly sets a
                     ;; RUSTC_WRAPPER environment variable which points
                     ;; to /usr/bin/env. Since it's not a shebang, it
                     ;; needs to be manually patched
                     (("\"/usr/bin/env\"")
                      (string-append "\"" coreutils "/bin/env\"")))
                   #t)))
             (add-after 'patch-cargo-env-shebang 'ignore-cargo-package-tests
               (lambda* _
                 (substitute* "src/tools/cargo/tests/testsuite/package.rs"
                   ;; These tests largely check that cargo outputs warning/error
                   ;; messages as expected. It seems that cargo outputs an
                   ;; absolute path to something in the store instead of the
                   ;; expected relative path (e.g. `[..]`) so we'll ignore
                   ;; these for now
                   (("fn include") "#[ignore]\nfn include")
                   (("fn exclude") "#[ignore]\nfn exclude"))
                   #t))
             ;; The test has been moved elsewhere.
             (replace 'disable-amd64-avx-test
               (lambda _
                 (substitute* "src/test/ui/run-pass/issues/issue-44056.rs"
	          (("only-x86_64") "ignore-test"))
                  #t)))))))))

(define-public rust-1.31
  (let ((base-rust
         (rust-bootstrapped-package-pre-1.32 rust-1.30 "1.31.1"
          "0sk84ff0cklybcp0jbbxcw7lk7mrm6kb6km5nzd6m64dy0igrlli"
          #:patches
          '("rust-1.25-accept-more-detailed-gdb-lines.patch"
            "rust-1.30-gdb-llvm.patch"
            "rust-reproducible-builds.patch"))))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'patch-tests 'patch-command-exec-tests
               (lambda* (#:key inputs #:allow-other-keys)
                 (let ((coreutils (assoc-ref inputs "coreutils")))
                   (substitute* "src/test/run-pass/command-exec.rs"
                     ;; This test suite includes some tests that the stdlib's
                     ;; `Command` execution properly handles situations where
                     ;; the environment or PATH variable are empty, but this
                     ;; fails since we don't have `echo` available in the usual
                     ;; Linux directories.
                     ;; NB: the leading space is so we don't fail a tidy check
                     ;; for trailing whitespace, and the newlines are to ensure
                     ;; we don't exceed the 100 chars tidy check as well
                     ((" Command::new\\(\"echo\"\\)")
                      (string-append "\nCommand::new(\"" coreutils "/bin/echo\")\n")))
                   #t)))
	      ;; The test has been moved elsewhere.
	      (replace 'disable-amd64-avx-test
	        (lambda _
	          (substitute* "src/test/ui/issues/issue-44056.rs"
                   (("only-x86_64") "ignore-test"))
                  #t))
             (add-after 'patch-tests 'patch-process-docs-rev-cmd
               (lambda* _
                 ;; Disable some doc tests which depend on the "rev" command
                 ;; https://github.com/rust-lang/rust/pull/58746
                 (substitute* "src/libstd/process.rs"
                   (("```rust") "```rust,no_run"))
                 #t)))))))))

(define-public rust
  (let ((base-rust
         (rust-bootstrapped-package rust-1.31 "1.32.0"
          "0ji2l9xv53y27xy72qagggvq47gayr5lcv2jwvmfirx029vlqnac"
          #:patches '("rust-reproducible-builds.patch")
          ;; the vendor directory has moved to the root of
          ;; the tarball, so we have to strip an extra prefix
          #:patch-flags '("-p2"))))
    (package
      (inherit base-rust)
      (inputs
       ;; Downgrade to LLVM 6, all LTO tests appear to fail with LLVM 7.0.1
       (alist-replace "llvm" (list llvm-6)
                      (package-inputs base-rust)))
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             ;; Cargo.lock and the vendor/ directory have been moved to the
             ;; root of the rust tarball
             (replace 'patch-cargo-checksums
               (lambda* _
                 (substitute* "Cargo.lock"
                   (("(\"checksum .* = )\".*\"" all name)
                    (string-append name "\"" ,%cargo-reference-hash "\"")))
                 (for-each
                  (lambda (filename)
                    (use-modules (guix build cargo-utils))
                    (delete-file filename)
                    (let* ((dir (dirname filename)))
                      (display (string-append
                                "patch-cargo-checksums: generate-checksums for "
                                dir "\n"))
                      (generate-checksums dir ,%cargo-reference-project-file)))
                  (find-files "vendor" ".cargo-checksum.json"))
                 #t))
             (add-after 'enable-codegen-tests 'override-jemalloc
               (lambda* (#:key inputs #:allow-other-keys)
                 ;; The compiler is no longer directly built against jemalloc,
                 ;; but rather via the jemalloc-sys crate (which vendors the
                 ;; jemalloc source). To use jemalloc we must enable linking to
                 ;; it (otherwise it would use the system allocator), and set
                 ;; an environment variable pointing to the compiled jemalloc.
                 (substitute* "config.toml"
                   (("^jemalloc =.*$") "")
                   (("[[]rust[]]") "\n[rust]\njemalloc=true\n"))
                 (setenv "JEMALLOC_OVERRIDE" (string-append (assoc-ref inputs "jemalloc")
                                                            "/lib/libjemalloc_pic.a"))
                 #t))
             ;; Remove no longer relevant steps
             (delete 'remove-flaky-test)
             (delete 'patch-aarch64-test))))))))