Merge branch 'master' into staging-next

42 files changed, 1843 insertions, 694 deletions

diff --git a/pkgs/development/compilers/ghcjs-ng/8.4/dep-overrides.nix b/pkgs/development/compilers/ghcjs-ng/8.4/dep-overrides.nix
deleted file mode 100644
index efba0dc8634f..000000000000
--- a/pkgs/development/compilers/ghcjs-ng/8.4/dep-overrides.nix
+++ /dev/null
@@ -1,9 +0,0 @@
-{ haskellLib }:
-
-let inherit (haskellLib) dontCheck doJailbreak;
-in self: super: {
-  haddock-library-ghcjs = doJailbreak (dontCheck super.haddock-library-ghcjs);
-  haddock-api-ghcjs = doJailbreak super.haddock-api-ghcjs;
-
-  template-haskell-ghcjs = doJailbreak super.template-haskell-ghcjs;
-}
diff --git a/pkgs/development/compilers/ghcjs-ng/8.4/git.json b/pkgs/development/compilers/ghcjs-ng/8.4/git.json
deleted file mode 100644
index cfa6cf1d7d26..000000000000
--- a/pkgs/development/compilers/ghcjs-ng/8.4/git.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "url": "https://github.com/ghcjs/ghcjs",
-  "rev": "81bf5f31dabaa711aab234cb119eb9c998ccb129",
-  "sha256": "1bgnc71kjqicqv2xq8p70nck600yi2p7g4k9r1jclv21ib7i5hmx",
-  "fetchSubmodules": true
-}
diff --git a/pkgs/development/compilers/ghcjs-ng/8.4/stage0.nix b/pkgs/development/compilers/ghcjs-ng/8.4/stage0.nix
deleted file mode 100644
index 3b89db144979..000000000000
--- a/pkgs/development/compilers/ghcjs-ng/8.4/stage0.nix
+++ /dev/null
@@ -1,176 +0,0 @@
-{ callPackage, configuredSrc }:
-
-{
-
-  ghcjs = callPackage
-    ({ mkDerivation, aeson, array, attoparsec, base, base16-bytestring
-    , base64-bytestring, binary, bytestring, Cabal, containers
-    , cryptohash, data-default, deepseq, directory, executable-path
-    , filepath, ghc-api-ghcjs, ghc-boot, ghc-paths, ghci-ghcjs
-    , ghcjs-th, haddock-api-ghcjs, hashable, haskell-src-exts
-    , haskell-src-meta, http-types, HUnit, lens, lifted-base, mtl
-    , network, optparse-applicative, parallel, parsec, process, random
-    , regex-posix, safe, shelly, split, stdenv, stringsearch, syb
-    , system-fileio, system-filepath, tar, template-haskell
-    , template-haskell-ghcjs, terminfo, test-framework
-    , test-framework-hunit, text, time, transformers
-    , transformers-compat, unix, unix-compat, unordered-containers
-    , vector, wai, wai-app-static, wai-extra, wai-websockets, warp
-    , webdriver, websockets, wl-pprint-text, yaml
-    }:
-    mkDerivation {
-      pname = "ghcjs";
-      version = "8.4.0.1";
-      src = configuredSrc + /.;
-      isLibrary = true;
-      isExecutable = true;
-      enableSeparateDataOutput = true;
-      setupHaskellDepends = [
-        base Cabal containers directory filepath process template-haskell
-        transformers
-      ];
-      libraryHaskellDepends = [
-        aeson array attoparsec base base16-bytestring base64-bytestring
-        binary bytestring Cabal containers cryptohash data-default deepseq
-        directory filepath ghc-api-ghcjs ghc-boot ghc-paths ghci-ghcjs
-        ghcjs-th hashable haskell-src-exts haskell-src-meta lens mtl
-        optparse-applicative parallel parsec process regex-posix safe split
-        stringsearch syb template-haskell template-haskell-ghcjs text time
-        transformers unordered-containers vector wl-pprint-text yaml
-      ];
-      executableHaskellDepends = [
-        aeson base binary bytestring Cabal containers directory
-        executable-path filepath ghc-api-ghcjs ghc-boot haddock-api-ghcjs
-        lens mtl optparse-applicative process shelly system-fileio
-        system-filepath tar terminfo text time transformers
-        transformers-compat unix unix-compat unordered-containers vector
-        yaml
-      ];
-      testHaskellDepends = [
-        aeson base bytestring data-default deepseq directory http-types
-        HUnit lens lifted-base network optparse-applicative process random
-        shelly system-fileio system-filepath test-framework
-        test-framework-hunit text time transformers unordered-containers
-        wai wai-app-static wai-extra wai-websockets warp webdriver
-        websockets yaml
-      ];
-      description = "Haskell to JavaScript compiler";
-      license = stdenv.lib.licenses.mit;
-    }) {};
-
-  ghc-api-ghcjs = callPackage
-    ({ mkDerivation, array, base, binary, bytestring, containers
-    , deepseq, directory, filepath, ghc-boot, ghc-boot-th, ghci-ghcjs
-    , hpc, process, stdenv, template-haskell-ghcjs, terminfo, time
-    , transformers, unix
-    }:
-    mkDerivation {
-      pname = "ghc-api-ghcjs";
-      version = "8.4.0";
-      src = configuredSrc + /lib/ghc-api-ghcjs;
-      libraryHaskellDepends = [
-        array base binary bytestring containers deepseq directory filepath
-        ghc-boot ghc-boot-th ghci-ghcjs hpc process template-haskell-ghcjs
-        terminfo time transformers unix
-      ];
-      homepage = "http://www.haskell.org/ghc/";
-      description = "The GHC API (customized for GHCJS)";
-      license = stdenv.lib.licenses.bsd3;
-    }) {};
-
-  ghci-ghcjs = callPackage
-    ({ mkDerivation, array, base, binary, bytestring, containers
-    , deepseq, filepath, ghc-boot, ghc-boot-th, stdenv
-    , template-haskell-ghcjs, transformers, unix
-    }:
-    mkDerivation {
-      pname = "ghci-ghcjs";
-      version = "8.4.0";
-      src = configuredSrc + /lib/ghci-ghcjs;
-      libraryHaskellDepends = [
-        array base binary bytestring containers deepseq filepath ghc-boot
-        ghc-boot-th template-haskell-ghcjs transformers unix
-      ];
-      description = "The library supporting GHC's interactive interpreter (customized for GHCJS)";
-      license = stdenv.lib.licenses.bsd3;
-    }) {};
-
-  ghcjs-th = callPackage
-    ({ mkDerivation, base, binary, bytestring, containers, ghc-prim
-    , ghci-ghcjs, stdenv, template-haskell-ghcjs
-    }:
-    mkDerivation {
-      pname = "ghcjs-th";
-      version = "0.1.0.0";
-      src = configuredSrc + /lib/ghcjs-th;
-      libraryHaskellDepends = [
-        base binary bytestring containers ghc-prim ghci-ghcjs
-        template-haskell-ghcjs
-      ];
-      homepage = "https://github.com/ghcjs";
-      license = stdenv.lib.licenses.mit;
-    }) {};
-
-  haddock-api-ghcjs = callPackage
-    ({ mkDerivation, array, base, bytestring, Cabal, containers, deepseq
-    , directory, filepath, ghc-api-ghcjs, ghc-boot, ghc-paths
-    , haddock-library-ghcjs, hspec, hspec-discover, QuickCheck, stdenv
-    , transformers, xhtml
-    }:
-    mkDerivation {
-      pname = "haddock-api-ghcjs";
-      version = "2.20.0";
-      src = configuredSrc + /lib/haddock-api-ghcjs;
-      enableSeparateDataOutput = true;
-      libraryHaskellDepends = [
-        array base bytestring Cabal containers deepseq directory filepath
-        ghc-api-ghcjs ghc-boot ghc-paths haddock-library-ghcjs transformers
-        xhtml
-      ];
-      testHaskellDepends = [
-        array base bytestring Cabal containers deepseq directory filepath
-        ghc-api-ghcjs ghc-boot ghc-paths haddock-library-ghcjs hspec
-        QuickCheck transformers xhtml
-      ];
-      testToolDepends = [ hspec-discover ];
-      homepage = "http://www.haskell.org/haddock/";
-      description = "A documentation-generation tool for Haskell libraries";
-      license = stdenv.lib.licenses.bsd3;
-    }) {};
-
-  haddock-library-ghcjs = callPackage
-    ({ mkDerivation, base, base-compat, bytestring, containers, deepseq
-    , directory, filepath, haddock-library, hspec, hspec-discover
-    , optparse-applicative, QuickCheck, stdenv, transformers, tree-diff
-    }:
-    mkDerivation {
-      pname = "haddock-library-ghcjs";
-      version = "1.6.0";
-      src = configuredSrc + /lib/haddock-library-ghcjs;
-      libraryHaskellDepends = [
-        base bytestring containers deepseq transformers
-      ];
-      testHaskellDepends = [
-        base base-compat bytestring containers deepseq directory filepath
-        haddock-library hspec optparse-applicative QuickCheck transformers
-        tree-diff
-      ];
-      testToolDepends = [ hspec-discover ];
-      doHaddock = false;
-      homepage = "http://www.haskell.org/haddock/";
-      description = "Library exposing some functionality of Haddock";
-      license = stdenv.lib.licenses.bsd3;
-    }) {};
-
-  template-haskell-ghcjs = callPackage
-    ({ mkDerivation, base, ghc-boot-th, pretty, stdenv }:
-    mkDerivation {
-      pname = "template-haskell-ghcjs";
-      version = "2.13.0.0";
-      src = configuredSrc + /lib/template-haskell-ghcjs;
-      libraryHaskellDepends = [ base ghc-boot-th pretty ];
-      description = "Support library for Template Haskell (customized for GHCJS)";
-      license = stdenv.lib.licenses.bsd3;
-    }) {};
-
-}
diff --git a/pkgs/development/compilers/ghcjs-ng/default.nix b/pkgs/development/compilers/ghcjs-ng/default.nix
index e668be8e0740..747ea5cf77f4 100644
--- a/pkgs/development/compilers/ghcjs-ng/default.nix
+++ b/pkgs/development/compilers/ghcjs-ng/default.nix
@@ -104,5 +104,4 @@ in stdenv.mkDerivation {
 
     meta.platforms = passthru.bootPkgs.ghc.meta.platforms;
     meta.maintainers = [lib.maintainers.elvishjerricco];
-    meta.hydraPlatforms = [];
   }
diff --git a/pkgs/development/compilers/ghcjs/base.nix b/pkgs/development/compilers/ghcjs/base.nix
deleted file mode 100644
index ba0bbb1962b8..000000000000
--- a/pkgs/development/compilers/ghcjs/base.nix
+++ /dev/null
@@ -1,161 +0,0 @@
-{ mkDerivation
-, lib
-, broken ? false
-, test-framework
-, test-framework-hunit
-, data-default
-, ghc-paths
-, haskell-src-exts
-, haskell-src-meta
-, optparse-applicative
-, system-fileio
-, system-filepath
-, text-binary
-, unordered-containers
-, cabal-install
-, wl-pprint-text
-, base16-bytestring
-, executable-path
-, transformers-compat
-, haddock-api
-, regex-posix
-
-, bootPkgs, gmp
-
-, runCommand
-, nodejs, stdenv, filepath, HTTP, HUnit, mtl, network, QuickCheck, random, stm
-, time
-, zlib, aeson, attoparsec, bzlib, hashable
-, lens
-, parallel, safe, shelly, split, stringsearch, syb
-, tar, terminfo
-, vector, yaml
-, alex, happy, git, gnumake, autoconf, patch
-, automake, libtool
-, cryptohash
-, haddock, hspec, xhtml, pkgs
-, coreutils
-, libiconv
-
-, version
-, ghcjsSrc
-, ghcjsBootSrc
-, ghcjsBoot ? import ./ghcjs-boot.nix {
-    inherit runCommand;
-    src = ghcjsBootSrc;
-  }
-, shims
-
-# This is the list of the Stage 1 packages that are built into a booted ghcjs installation
-# It can be generated with the command:
-# nix-shell -p haskell.packages.ghcjs.ghc --command "ghcjs-pkg list | sed -n 's/^    \(.*\)-\([0-9.]*\)$/\1_\2/ p' | sed 's/\./_/g' | sed 's/^\([^_]*\)\(.*\)$/      \"\1\"/'"
-, stage1Packages
-
-, stage2 ? import ./stage2.nix
-
-, patches
-
-# used for resolving compiler plugins
-, ghcLibdir ? null
-}:
-let
-  inherit (bootPkgs) ghc;
-
-in mkDerivation ({
-  pname = "ghcjs";
-  inherit version;
-  src = ghcjsSrc;
-  isLibrary = true;
-  isExecutable = true;
-  jailbreak = true;
-  doHaddock = false;
-  doCheck = false;
-  buildDepends = [
-    filepath HTTP mtl network random stm time zlib aeson attoparsec
-    bzlib data-default ghc-paths hashable haskell-src-exts haskell-src-meta
-    lens optparse-applicative parallel safe shelly split
-    stringsearch syb system-fileio system-filepath tar terminfo text-binary
-    unordered-containers vector wl-pprint-text yaml
-    alex happy git gnumake autoconf automake libtool patch gmp
-    base16-bytestring cryptohash executable-path haddock-api
-    transformers-compat QuickCheck haddock hspec xhtml
-    regex-posix libiconv
-  ];
-  buildTools = [ nodejs git ];
-  testDepends = [
-    HUnit test-framework test-framework-hunit
-  ];
-  inherit patches;
-  postPatch = ''
-    substituteInPlace Setup.hs \
-      --replace "/usr/bin/env" "${coreutils}/bin/env"
-
-    substituteInPlace src/Compiler/Info.hs \
-      --replace "@PREFIX@" "$out"          \
-      --replace "@VERSION@" "${version}"
-
-    substituteInPlace src-bin/Boot.hs \
-      --replace "@PREFIX@" "$out"     \
-      --replace "@CC@"     "${stdenv.cc}/bin/cc"
-  '';
-  preBuild = ''
-    export HOME="$TMP"
-
-    local topDir=$out/lib/ghcjs-${version}
-    mkdir -p $topDir
-
-    cp -r ${ghcjsBoot} $topDir/ghcjs-boot
-    chmod -R u+w $topDir/ghcjs-boot
-
-    cp -r ${shims} $topDir/shims
-    chmod -R u+w $topDir/shims
-
-    # Make the patches be relative their corresponding package's directory.
-    # See: https://github.com/ghcjs/ghcjs-boot/pull/12
-    for patch in "$topDir/ghcjs-boot/patches/"*.patch; do
-      echo "fixing patch: $patch"
-      sed -i -e 's@ \(a\|b\)/boot/[^/]\+@ \1@g' $patch
-    done
-  '';
-  # We build with --quick so we can build stage 2 packages separately.
-  # This is necessary due to: https://github.com/haskell/cabal/commit/af19fb2c2d231d8deff1cb24164a2bf7efb8905a
-  # Cabal otherwise fails to build: http://hydra.nixos.org/build/31824079/nixlog/1/raw
-  postInstall = ''
-    PATH=$out/bin:$PATH LD_LIBRARY_PATH=${gmp.out}/lib:${stdenv.cc}/lib64:$LD_LIBRARY_PATH \
-      env -u GHC_PACKAGE_PATH $out/bin/ghcjs-boot \
-        --dev \
-        --quick \
-        --with-cabal ${cabal-install}/bin/cabal \
-        --with-gmp-includes ${gmp.dev}/include \
-        --with-gmp-libraries ${gmp.out}/lib
-  '' + lib.optionalString (ghcLibdir != null) ''
-    printf '%s' '${ghcLibdir}' > "$out/lib/ghcjs-${version}/ghc_libdir"
-  '';
-  passthru = {
-    inherit bootPkgs;
-    ghcVersion = ghc.version;
-    isCross = true;
-    isGhcjs = true;
-    inherit nodejs ghcjsBoot;
-    socket-io = pkgs.nodePackages."socket.io";
-    haskellCompilerName = "ghcjs-${version}";
-
-    # let us assume ghcjs is never actually cross compiled
-    targetPrefix = "";
-
-    enableShared = true;
-
-    inherit stage1Packages;
-    mkStage2 = stage2 {
-      inherit ghcjsBoot;
-    };
-  };
-
-  homepage = https://github.com/ghcjs/ghcjs;
-  description = "A Haskell to JavaScript compiler that uses the GHC API";
-  license = stdenv.lib.licenses.bsd3;
-  platforms = ghc.meta.platforms;
-  maintainers = with stdenv.lib.maintainers; [ jwiegley cstrahan dmjio elvishjerricco ];
-  hydraPlatforms = if broken then [] else ghc.meta.platforms;
-  inherit broken;
-})
diff --git a/pkgs/development/compilers/ghcjs/gen-stage2.rb b/pkgs/development/compilers/ghcjs/gen-stage2.rb
deleted file mode 100755
index 709e635db55c..000000000000
--- a/pkgs/development/compilers/ghcjs/gen-stage2.rb
+++ /dev/null
@@ -1,54 +0,0 @@
-#!/usr/bin/env ruby
-
-require 'pathname'
-
-# from boot.yaml in ghcjs/ghcjs
-stage2_packages = [
-  "boot/async",
-  "boot/aeson",
-  "boot/attoparsec",
-  "boot/case-insensitive",
-  "boot/dlist",
-  "boot/extensible-exceptions",
-  "boot/hashable",
-  "boot/mtl",
-  "boot/old-time",
-  "boot/parallel",
-  "boot/scientific",
-  "boot/stm",
-  "boot/syb",
-  "boot/text",
-  "boot/unordered-containers",
-  "boot/vector",
-  "ghcjs/ghcjs-base",
-  # not listed under stage2, but needed when "quick booting".
-  "boot/cabal/Cabal"
-]
-
-nixpkgs = File.expand_path("../../../../..", __FILE__)
-boot = ARGV[0] || `nix-build #{nixpkgs} -A haskell.packages.ghcjs.ghc.ghcjsBoot`.chomp
-
-out = "".dup
-out << "{ ghcjsBoot }: { callPackage }:\n"
-out << "\n"
-out << "{\n"
-
-stage2_packages.each do |package|
-  name = Pathname.new(package).basename
-  nix = `cabal2nix file://#{boot}/#{package}  --jailbreak`
-  nix.sub!(/src =.*?$/, "src = \"${ghcjsBoot}/#{package}\";")
-  nix.sub!("  doCheck = false;\n", "")
-  nix.sub!("libraryHaskellDepends", "doCheck = false;\n  libraryHaskellDepends")
-  # cabal2nix somehow generates the deps for 'text' as if it had selected flag
-  # 'integer-simple' (despite not passing the flag within the generated
-  # expression). We want integer-gmp instead.
-  nix.gsub!(/integer-simple/, "integer-gmp")
-  nix = nix.split("\n").join("\n      ")
-
-  out << "  #{name} = callPackage\n"
-  out << "    (#{nix}) {};\n"
-end
-
-out << "}"
-
-puts out
diff --git a/pkgs/development/compilers/ghcjs/ghcjs-boot.nix b/pkgs/development/compilers/ghcjs/ghcjs-boot.nix
deleted file mode 100644
index c00e13a92404..000000000000
--- a/pkgs/development/compilers/ghcjs/ghcjs-boot.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-{ runCommand, src }:
-
-# we remove the patches so ghcjs-boot doesn't try to apply them again.
-runCommand "${src.name}-patched" {} ''
-  cp -r ${src} $out
-  chmod -R +w $out
-
-  # Make the patches be relative their corresponding package's directory.
-  # See: https://github.com/ghcjs/ghcjs-boot/pull/12
-  for patch in $out/patches/*.patch; do
-    echo ">> fixing patch: $patch"
-    sed -i -e 's@ \(a\|b\)/boot/[^/]\+@ \1@g' $patch
-  done
-
-  for package in $(cd $out/boot; echo *); do
-    patch=$out/patches/$package.patch
-    if [[ -e $patch ]]; then
-      echo ">> patching package: $package"
-      pushd $out/boot/$package
-      patch -p1 < $patch
-      rm $patch
-      popd
-    fi
-  done
-''
diff --git a/pkgs/development/compilers/halide/default.nix b/pkgs/development/compilers/halide/default.nix
index 683f8d7ace09..0b28b61a27b2 100644
--- a/pkgs/development/compilers/halide/default.nix
+++ b/pkgs/development/compilers/halide/default.nix
@@ -3,7 +3,7 @@
 }:
 
 let
-  version = "2018_02_15";
+  version = "2019_08_27";
 
 in llvmPackages.stdenv.mkDerivation {
 
@@ -13,7 +13,7 @@ in llvmPackages.stdenv.mkDerivation {
     owner = "halide";
     repo = "Halide";
     rev = "release_${version}";
-    sha256 = "14lmpbxydx7ii0pxds6rgq5vw4i6yfjsq0bai1l5wwpv1rnwmbxd";
+    sha256 = "09xf8v9zyxx2fn6s1yzjkyzcf9zyzrg3x5vivgd2ljzbfhm8wh7n";
   };
 
   patches = [ ./nix.patch ];
@@ -58,7 +58,7 @@ in llvmPackages.stdenv.mkDerivation {
     description = "C++ based language for image processing and computational photography";
     homepage = "https://halide-lang.org";
     license = licenses.mit;
-    platforms = platforms.linux;
+    platforms = [ "i686-linux" "x86_64-linux" ];
     maintainers = [ maintainers.ck3d ];
   };
 }
diff --git a/pkgs/development/compilers/halide/nix.patch b/pkgs/development/compilers/halide/nix.patch
index 2ab1e31adeb4..fb9bbf1a4cf7 100644
--- a/pkgs/development/compilers/halide/nix.patch
+++ b/pkgs/development/compilers/halide/nix.patch
@@ -1,11 +1,11 @@
 diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 40a685b7e..c452efd09 100644
+index 4ba384324..7e23038f7 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
-@@ -49,10 +49,10 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
-
+@@ -75,10 +75,10 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
+ 
  set(LLVM_VERSION "${LLVM_VERSION_MAJOR}${LLVM_VERSION_MINOR}")
-
+ 
 -file(TO_NATIVE_PATH "${LLVM_TOOLS_BINARY_DIR}/llvm-as${CMAKE_EXECUTABLE_SUFFIX}" LLVM_AS)
 -file(TO_NATIVE_PATH "${LLVM_TOOLS_BINARY_DIR}/llvm-nm${CMAKE_EXECUTABLE_SUFFIX}" LLVM_NM)
 -file(TO_NATIVE_PATH "${LLVM_TOOLS_BINARY_DIR}/clang${CMAKE_EXECUTABLE_SUFFIX}" CLANG)
@@ -14,7 +14,7 @@ index 40a685b7e..c452efd09 100644
 +find_program(LLVM_NM llvm-nm HINTS ${LLVM_TOOLS_BINARY_DIR})
 +find_program(CLANG clang HINTS ${LLVM_TOOLS_BINARY_DIR})
 +find_program(LLVM_CONFIG llvm-config HINTS ${LLVM_TOOLS_BINARY_DIR})
-
+ 
  # LLVM doesn't appear to expose --system-libs via its CMake interface,
  # so we must shell out to llvm-config to find this info
 diff --git a/apps/linear_algebra/CMakeLists.txt b/apps/linear_algebra/CMakeLists.txt
@@ -27,7 +27,7 @@ index 132c80e6a..36ce865f2 100644
    set(OpenBLAS_EXTRA_LIBS)
 -  set(BLAS_VENDORS OpenBLAS ATLAS)
 +  set(BLAS_VENDORS OpenBLAS)
-
+ 
    # TODO
    # there are more vendors we could add here that support the cblas interface
 @@ -41,6 +41,7 @@ if (CBLAS_FOUND)
@@ -39,17 +39,18 @@ index 132c80e6a..36ce865f2 100644
      endif()
    endforeach()
 diff --git a/apps/linear_algebra/tests/CMakeLists.txt b/apps/linear_algebra/tests/CMakeLists.txt
-index 4b95eb3bb..1daa97437 100644
+index cc02eb0a4..c20419a0d 100644
 --- a/apps/linear_algebra/tests/CMakeLists.txt
 +++ b/apps/linear_algebra/tests/CMakeLists.txt
-@@ -19,6 +19,6 @@ target_compile_options(test_halide_blas PRIVATE -Wno-unused-variable)
+@@ -19,7 +19,7 @@ target_compile_options(test_halide_blas PRIVATE -Wno-unused-variable)
  target_link_libraries(test_halide_blas
    PRIVATE
     halide_blas
 -   cblas # XXX fragile
 +   ${BLAS_LIBRARIES}
-    Halide
+    ${HALIDE_COMPILER_LIB}
  )
---
-2.15.0
+ 
+-- 
+2.23.0
 
diff --git a/pkgs/development/compilers/llvm/7/compiler-rt.nix b/pkgs/development/compilers/llvm/7/compiler-rt.nix
index 0912435327ce..5d7266f39ecd 100644
--- a/pkgs/development/compilers/llvm/7/compiler-rt.nix
+++ b/pkgs/development/compilers/llvm/7/compiler-rt.nix
@@ -7,11 +7,11 @@ stdenv.mkDerivation {
   nativeBuildInputs = [ cmake python llvm ];
   buildInputs = stdenv.lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
 
-  cmakeFlags = [
+  cmakeFlags = stdenv.lib.optionals (stdenv.hostPlatform.useLLVM or false || stdenv.isDarwin) [
     "-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON"
     "-DCMAKE_C_COMPILER_TARGET=${stdenv.hostPlatform.config}"
     "-DCMAKE_ASM_COMPILER_TARGET=${stdenv.hostPlatform.config}"
-  ] ++ stdenv.lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) [
+  ] ++ stdenv.lib.optionals (stdenv.hostPlatform.useLLVM or false) [
     "-DCMAKE_C_FLAGS=-nodefaultlibs"
     "-DCMAKE_CXX_COMPILER_WORKS=ON"
     "-DCOMPILER_RT_BUILD_BUILTINS=ON"
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
 
   patches = [
     ./compiler-rt-codesign.patch # Revert compiler-rt commit that makes codesign mandatory
-  ] ++ stdenv.lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) ./crtbegin-and-end.patch
+  ] ++ stdenv.lib.optional (stdenv.hostPlatform.useLLVM or false) ./crtbegin-and-end.patch
     ++ stdenv.lib.optional stdenv.hostPlatform.isMusl ./sanitizers-nongnu.patch;
 
   # TSAN requires XPC on Darwin, which we have no public/free source files for. We can depend on the Apple frameworks
@@ -37,7 +37,7 @@ stdenv.mkDerivation {
   postPatch = stdenv.lib.optionalString stdenv.isDarwin ''
     substituteInPlace cmake/config-ix.cmake \
       --replace 'set(COMPILER_RT_HAS_TSAN TRUE)' 'set(COMPILER_RT_HAS_TSAN FALSE)'
-  '' + stdenv.lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
+  '' + stdenv.lib.optionalString (stdenv.hostPlatform.useLLVM or false) ''
     substituteInPlace lib/builtins/int_util.c \
       --replace "#include <stdlib.h>" ""
     substituteInPlace lib/builtins/clear_cache.c \
@@ -49,7 +49,7 @@ stdenv.mkDerivation {
   # Hack around weird upsream RPATH bug
   postInstall = stdenv.lib.optionalString stdenv.isDarwin ''
     ln -s "$out/lib"/*/* "$out/lib"
-  '' + stdenv.lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
+  '' + stdenv.lib.optionalString (stdenv.hostPlatform.useLLVM or false) ''
     ln -s $out/lib/*/clang_rt.crtbegin-*.o $out/lib/linux/crtbegin.o
     ln -s $out/lib/*/clang_rt.crtend-*.o $out/lib/linux/crtend.o
     ln -s $out/lib/*/clang_rt.crtbegin_shared-*.o $out/lib/linux/crtbeginS.o
diff --git a/pkgs/development/compilers/llvm/8/compiler-rt.nix b/pkgs/development/compilers/llvm/8/compiler-rt.nix
index 936c877d58c9..88788852862f 100644
--- a/pkgs/development/compilers/llvm/8/compiler-rt.nix
+++ b/pkgs/development/compilers/llvm/8/compiler-rt.nix
@@ -7,11 +7,10 @@ stdenv.mkDerivation {
   nativeBuildInputs = [ cmake python llvm ];
   buildInputs = stdenv.lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
 
-  cmakeFlags = [
+  cmakeFlags = stdenv.lib.optionals (stdenv.hostPlatform.useLLVM or false) [
     "-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON"
     "-DCMAKE_C_COMPILER_TARGET=${stdenv.hostPlatform.config}"
     "-DCMAKE_ASM_COMPILER_TARGET=${stdenv.hostPlatform.config}"
-  ] ++ stdenv.lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     "-DCMAKE_C_FLAGS=-nodefaultlibs"
     "-DCMAKE_CXX_COMPILER_WORKS=ON"
     "-DCOMPILER_RT_BUILD_SANITIZERS=OFF"
@@ -37,7 +36,7 @@ stdenv.mkDerivation {
   patches = [
     ./compiler-rt-codesign.patch # Revert compiler-rt commit that makes codesign mandatory
   ]# ++ stdenv.lib.optional stdenv.hostPlatform.isMusl ./sanitizers-nongnu.patch
-    ++ stdenv.lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) ./crtbegin-and-end.patch;
+    ++ stdenv.lib.optional (stdenv.hostPlatform.useLLVM or false) ./crtbegin-and-end.patch;
 
   # TSAN requires XPC on Darwin, which we have no public/free source files for. We can depend on the Apple frameworks
   # to get it, but they're unfree. Since LLVM is rather central to the stdenv, we patch out TSAN support so that Hydra
@@ -47,7 +46,7 @@ stdenv.mkDerivation {
   postPatch = stdenv.lib.optionalString stdenv.isDarwin ''
     substituteInPlace cmake/config-ix.cmake \
       --replace 'set(COMPILER_RT_HAS_TSAN TRUE)' 'set(COMPILER_RT_HAS_TSAN FALSE)'
-  '' + stdenv.lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
+  '' + stdenv.lib.optionalString (stdenv.hostPlatform.useLLVM or false) ''
     substituteInPlace lib/builtins/int_util.c \
       --replace "#include <stdlib.h>" ""
     substituteInPlace lib/builtins/clear_cache.c \
diff --git a/pkgs/development/compilers/llvm/9/bintools.nix b/pkgs/development/compilers/llvm/9/bintools.nix
new file mode 100644
index 000000000000..72a2a7331930
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/bintools.nix
@@ -0,0 +1,19 @@
+{ runCommand, stdenv, llvm, lld, version }:
+
+let
+  prefix =
+    if stdenv.hostPlatform != stdenv.targetPlatform
+    then "${stdenv.targetPlatform.config}-"
+    else "";
+in runCommand "llvm-binutils-${version}" { preferLocalBuild = true; } ''
+   mkdir -p $out/bin
+   for prog in ${lld}/bin/*; do
+     ln -s $prog $out/bin/${prefix}$(basename $prog)
+   done
+   for prog in ${llvm}/bin/*; do
+     ln -s $prog $out/bin/${prefix}$(echo $(basename $prog) | sed -e "s|llvm-||")
+     ln -sf $prog $out/bin/${prefix}$(basename $prog)
+   done
+   rm -f $out/bin/${prefix}cat
+   ln -s ${lld}/bin/lld $out/bin/${prefix}ld
+''
diff --git a/pkgs/development/compilers/llvm/9/clang/compiler-rt-baremetal.patch b/pkgs/development/compilers/llvm/9/clang/compiler-rt-baremetal.patch
new file mode 100644
index 000000000000..a4a0f21b0fcd
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/clang/compiler-rt-baremetal.patch
@@ -0,0 +1,53 @@
+Index: lib/Driver/ToolChains/BareMetal.cpp
+===================================================================
+--- a/lib/Driver/ToolChains/BareMetal.cpp
++++ b/lib/Driver/ToolChains/BareMetal.cpp
+@@ -157,7 +157,7 @@
+ void BareMetal::AddLinkRuntimeLib(const ArgList &Args,
+                                   ArgStringList &CmdArgs) const {
+   CmdArgs.push_back(Args.MakeArgString("-lclang_rt.builtins-" +
+-                                       getTriple().getArchName() + ".a"));
++                                       getTriple().getArchName()));
+ }
+ 
+ void baremetal::Linker::ConstructJob(Compilation &C, const JobAction &JA,
+Index: test/Driver/baremetal.cpp
+===================================================================
+--- a/test/Driver/baremetal.cpp
++++ b/test/Driver/baremetal.cpp
+@@ -13,7 +13,7 @@
+ // CHECK-V6M-C-NEXT: "{{[^"]*}}ld{{(\.(lld|bfd|gold))?}}{{(\.exe)?}}" "{{.*}}.o" "-Bstatic"
+ // CHECK-V6M-C-SAME: "-L[[RESOURCE_DIR:[^"]+]]{{[/\\]+}}lib{{[/\\]+}}baremetal"
+ // CHECK-V6M-C-SAME: "-T" "semihosted.lds" "-Lsome{{[/\\]+}}directory{{[/\\]+}}user{{[/\\]+}}asked{{[/\\]+}}for"
+-// CHECK-V6M-C-SAME: "-lc" "-lm" "-lclang_rt.builtins-armv6m.a"
++// CHECK-V6M-C-SAME: "-lc" "-lm" "-lclang_rt.builtins-armv6m"
+ // CHECK-V6M-C-SAME: "-o" "{{.*}}.o"
+ 
+ // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+@@ -35,7 +35,7 @@
+ // CHECK-V6M-DEFAULTCXX: "{{[^"]*}}ld{{(\.(lld|bfd|gold))?}}{{(\.exe)?}}" "{{.*}}.o" "-Bstatic"
+ // CHECK-V6M-DEFAULTCXX-SAME: "-L{{[^"]*}}{{[/\\]+}}lib{{(64)?}}{{[/\\]+}}clang{{[/\\]+}}{{.*}}{{[/\\]+}}lib{{[/\\]+}}baremetal"
+ // CHECK-V6M-DEFAULTCXX-SAME: "-lc++" "-lc++abi" "-lunwind"
+-// CHECK-V6M-DEFAULTCXX-SAME: "-lc" "-lm" "-lclang_rt.builtins-armv6m.a"
++// CHECK-V6M-DEFAULTCXX-SAME: "-lc" "-lm" "-lclang_rt.builtins-armv6m"
+ // CHECK-V6M-DEFAULTCXX-SAME: "-o" "{{.*}}.o"
+ 
+ // RUN: %clangxx -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+@@ -48,7 +48,7 @@
+ // CHECK-V6M-LIBCXX: "{{[^"]*}}ld{{(\.(lld|bfd|gold))?}}{{(\.exe)?}}" "{{.*}}.o" "-Bstatic"
+ // CHECK-V6M-LIBCXX-SAME: "-L{{[^"]*}}{{[/\\]+}}lib{{(64)?}}{{[/\\]+}}clang{{[/\\]+}}{{.*}}{{[/\\]+}}lib{{[/\\]+}}baremetal"
+ // CHECK-V6M-LIBCXX-SAME: "-lc++" "-lc++abi" "-lunwind"
+-// CHECK-V6M-LIBCXX-SAME: "-lc" "-lm" "-lclang_rt.builtins-armv6m.a"
++// CHECK-V6M-LIBCXX-SAME: "-lc" "-lm" "-lclang_rt.builtins-armv6m"
+ // CHECK-V6M-LIBCXX-SAME: "-o" "{{.*}}.o"
+ 
+ // RUN: %clangxx -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+@@ -61,7 +61,7 @@
+ // CHECK-V6M-LIBSTDCXX: "{{[^"]*}}ld{{(\.(lld|bfd|gold))?}}{{(\.exe)?}}" "{{.*}}.o" "-Bstatic"
+ // CHECK-V6M-LIBSTDCXX-SAME: "-L{{[^"]*}}{{[/\\]+}}lib{{(64)?}}{{[/\\]+}}clang{{[/\\]+}}{{.*}}{{[/\\]+}}lib{{[/\\]+}}baremetal"
+ // CHECK-V6M-LIBSTDCXX-SAME: "-lstdc++" "-lsupc++" "-lunwind"
+-// CHECK-V6M-LIBSTDCXX-SAME: "-lc" "-lm" "-lclang_rt.builtins-armv6m.a"
++// CHECK-V6M-LIBSTDCXX-SAME: "-lc" "-lm" "-lclang_rt.builtins-armv6m"
+ // CHECK-V6M-LIBSTDCXX-SAME: "-o" "{{.*}}.o"
+ 
+ // RUN: %clangxx -no-canonical-prefixes %s -### -o %t.o 2>&1 \
diff --git a/pkgs/development/compilers/llvm/9/clang/default.nix b/pkgs/development/compilers/llvm/9/clang/default.nix
new file mode 100644
index 000000000000..df6b916e87f0
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/clang/default.nix
@@ -0,0 +1,120 @@
+{ stdenv, fetch, cmake, libxml2, llvm, version, clang-tools-extra_src, python
+, fixDarwinDylibNames
+, enableManpages ? false
+, enablePolly ? false # TODO: get this info from llvm (passthru?)
+}:
+
+let
+  self = stdenv.mkDerivation ({
+    pname = "clang";
+    inherit version;
+
+    src = fetch "cfe" "0426ma80i41qsgzm1qdz81mjskck426diygxi2k5vji2gkpixa3v";
+
+    unpackPhase = ''
+      unpackFile $src
+      mv cfe-${version}* clang
+      sourceRoot=$PWD/clang
+      unpackFile ${clang-tools-extra_src}
+      mv clang-tools-extra-* $sourceRoot/tools/extra
+    '';
+
+    nativeBuildInputs = [ cmake python ]
+      ++ stdenv.lib.optional enableManpages python.pkgs.sphinx;
+
+    buildInputs = [ libxml2 llvm ]
+      ++ stdenv.lib.optional stdenv.isDarwin fixDarwinDylibNames;
+
+    cmakeFlags = [
+      "-DCMAKE_CXX_FLAGS=-std=c++11"
+      "-DCLANGD_BUILD_XPC=OFF"
+    ] ++ stdenv.lib.optionals enableManpages [
+      "-DCLANG_INCLUDE_DOCS=ON"
+      "-DLLVM_ENABLE_SPHINX=ON"
+      "-DSPHINX_OUTPUT_MAN=ON"
+      "-DSPHINX_OUTPUT_HTML=OFF"
+      "-DSPHINX_WARNINGS_AS_ERRORS=OFF"
+    ] ++ stdenv.lib.optionals enablePolly [
+      "-DWITH_POLLY=ON"
+      "-DLINK_POLLY_INTO_TOOLS=ON"
+    ];
+
+    patches = [
+      ./purity.patch
+      # https://reviews.llvm.org/D51899
+      ./compiler-rt-baremetal.patch
+    ];
+
+    postPatch = ''
+      sed -i -e 's/DriverArgs.hasArg(options::OPT_nostdlibinc)/true/' \
+             -e 's/Args.hasArg(options::OPT_nostdlibinc)/true/' \
+             lib/Driver/ToolChains/*.cpp
+
+      # Patch for standalone doc building
+      sed -i '1s,^,find_package(Sphinx REQUIRED)\n,' docs/CMakeLists.txt
+    '' + stdenv.lib.optionalString stdenv.hostPlatform.isMusl ''
+      sed -i -e 's/lgcc_s/lgcc_eh/' lib/Driver/ToolChains/*.cpp
+    '' + stdenv.lib.optionalString stdenv.hostPlatform.isDarwin ''
+      substituteInPlace tools/extra/clangd/CMakeLists.txt \
+        --replace "NOT HAVE_CXX_ATOMICS64_WITHOUT_LIB" FALSE
+    '';
+
+    outputs = [ "out" "lib" "python" ];
+
+    # Clang expects to find LLVMgold in its own prefix
+    postInstall = ''
+      if [ -e ${llvm}/lib/LLVMgold.so ]; then
+        ln -sv ${llvm}/lib/LLVMgold.so $out/lib
+      fi
+
+      ln -sv $out/bin/clang $out/bin/cpp
+
+      # Move libclang to 'lib' output
+      moveToOutput "lib/libclang.*" "$lib"
+      substituteInPlace $out/lib/cmake/clang/ClangTargets-release.cmake \
+          --replace "\''${_IMPORT_PREFIX}/lib/libclang." "$lib/lib/libclang."
+
+      mkdir -p $python/bin $python/share/clang/
+      mv $out/bin/{git-clang-format,scan-view} $python/bin
+      if [ -e $out/bin/set-xcode-analyzer ]; then
+        mv $out/bin/set-xcode-analyzer $python/bin
+      fi
+      mv $out/share/clang/*.py $python/share/clang
+      rm $out/bin/c-index-test
+    '';
+
+    enableParallelBuilding = true;
+
+    passthru = {
+      isClang = true;
+      inherit llvm;
+    } // stdenv.lib.optionalAttrs (stdenv.targetPlatform.isLinux || (stdenv.cc.isGNU && stdenv.cc.cc ? gcc)) {
+      gcc = if stdenv.cc.isGNU then stdenv.cc.cc else stdenv.cc.cc.gcc;
+    };
+
+    meta = {
+      description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
+      homepage    = http://llvm.org/;
+      license     = stdenv.lib.licenses.ncsa;
+      platforms   = stdenv.lib.platforms.all;
+    };
+  } // stdenv.lib.optionalAttrs enableManpages {
+    pname = "clang-manpages";
+
+    buildPhase = ''
+      make docs-clang-man
+    '';
+
+    installPhase = ''
+      mkdir -p $out/share/man/man1
+      # Manually install clang manpage
+      cp docs/man/*.1 $out/share/man/man1/
+    '';
+
+    outputs = [ "out" ];
+
+    doCheck = false;
+
+    meta.description = "man page for Clang ${version}";
+  });
+in self
diff --git a/pkgs/development/compilers/llvm/9/clang/purity.patch b/pkgs/development/compilers/llvm/9/clang/purity.patch
new file mode 100644
index 000000000000..a6729a9b004e
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/clang/purity.patch
@@ -0,0 +1,30 @@
+From 4add81bba40dcec62c4ea4481be8e35ac53e89d8 Mon Sep 17 00:00:00 2001
+From: Will Dietz <w@wdtz.org>
+Date: Thu, 18 May 2017 11:56:12 -0500
+Subject: [PATCH] "purity" patch for 5.0
+
+---
+ lib/Driver/ToolChains/Gnu.cpp | 7 -------
+ 1 file changed, 7 deletions(-)
+
+diff --git a/lib/Driver/ToolChains/Gnu.cpp b/lib/Driver/ToolChains/Gnu.cpp
+index fe3c0191bb..c6a482bece 100644
+--- a/lib/Driver/ToolChains/Gnu.cpp
++++ b/lib/Driver/ToolChains/Gnu.cpp
+@@ -494,13 +494,6 @@ void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
+   if (!IsStatic) {
+     if (Args.hasArg(options::OPT_rdynamic))
+       CmdArgs.push_back("-export-dynamic");
+-
+-    if (!Args.hasArg(options::OPT_shared) && !IsStaticPIE) {
+-      const std::string Loader =
+-          D.DyldPrefix + ToolChain.getDynamicLinker(Args);
+-      CmdArgs.push_back("-dynamic-linker");
+-      CmdArgs.push_back(Args.MakeArgString(Loader));
+-    }
+   }
+ 
+   CmdArgs.push_back("-o");
+-- 
+2.11.0
+
diff --git a/pkgs/development/compilers/llvm/9/compiler-rt-codesign.patch b/pkgs/development/compilers/llvm/9/compiler-rt-codesign.patch
new file mode 100644
index 000000000000..3cc12b94b200
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/compiler-rt-codesign.patch
@@ -0,0 +1,33 @@
+From 3dec5f3475a26aeb4678627795c4b67c6b7b4785 Mon Sep 17 00:00:00 2001
+From: Will Dietz <w@wdtz.org>
+Date: Tue, 19 Sep 2017 13:13:06 -0500
+Subject: [PATCH] remove codesign use on Apple, disable ios sim testing that
+ needs it
+
+---
+ cmake/Modules/AddCompilerRT.cmake |  8 ------
+ test/asan/CMakeLists.txt          | 52 ---------------------------------------
+ test/tsan/CMakeLists.txt          | 47 -----------------------------------
+ 3 files changed, 107 deletions(-)
+
+diff --git a/cmake/Modules/AddCompilerRT.cmake b/cmake/Modules/AddCompilerRT.cmake
+index bc5fb9ff7..b64eb4246 100644
+--- a/cmake/Modules/AddCompilerRT.cmake
++++ b/cmake/Modules/AddCompilerRT.cmake
+@@ -210,14 +210,6 @@ function(add_compiler_rt_runtime name type)
+         set_target_properties(${libname} PROPERTIES IMPORT_PREFIX "")
+         set_target_properties(${libname} PROPERTIES IMPORT_SUFFIX ".lib")
+       endif()
+-      if(APPLE)
+-        # Ad-hoc sign the dylibs
+-        add_custom_command(TARGET ${libname}
+-          POST_BUILD  
+-          COMMAND codesign --sign - $<TARGET_FILE:${libname}>
+-          WORKING_DIRECTORY ${COMPILER_RT_LIBRARY_OUTPUT_DIR}
+-        )
+-      endif()
+     endif()
+     install(TARGETS ${libname}
+       ARCHIVE DESTINATION ${COMPILER_RT_LIBRARY_INSTALL_DIR}
+2.14.1
+
diff --git a/pkgs/development/compilers/llvm/9/compiler-rt.nix b/pkgs/development/compilers/llvm/9/compiler-rt.nix
new file mode 100644
index 000000000000..9a333ad7c115
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/compiler-rt.nix
@@ -0,0 +1,68 @@
+{ stdenv, version, fetch, cmake, python, llvm, libcxxabi }:
+stdenv.mkDerivation rec {
+  pname = "compiler-rt";
+  inherit version;
+  src = fetch pname "03ni43lbkp63lr3p6sc94dphqmvnz5av5mml0xmk930xvnbcvr2n";
+
+  nativeBuildInputs = [ cmake python llvm ];
+  buildInputs = stdenv.lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
+
+  cmakeFlags = stdenv.lib.optionals (stdenv.hostPlatform.useLLVM or false) [
+    "-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON"
+    "-DCMAKE_C_COMPILER_TARGET=${stdenv.hostPlatform.config}"
+    "-DCMAKE_ASM_COMPILER_TARGET=${stdenv.hostPlatform.config}"
+    "-DCMAKE_C_FLAGS=-nodefaultlibs"
+    "-DCMAKE_CXX_COMPILER_WORKS=ON"
+    "-DCOMPILER_RT_BUILD_SANITIZERS=OFF"
+    "-DCOMPILER_RT_BUILD_XRAY=OFF"
+    "-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
+    "-DCOMPILER_RT_BUILD_PROFILE=OFF"
+    "-DCOMPILER_RT_BAREMETAL_BUILD=ON"
+    #https://stackoverflow.com/questions/53633705/cmake-the-c-compiler-is-not-able-to-compile-a-simple-test-program
+    "-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY"
+    "-DCMAKE_SIZEOF_VOID_P=${toString (stdenv.hostPlatform.parsed.cpu.bits / 8)}"
+  ] ++ stdenv.lib.optionals stdenv.hostPlatform.isMusl [
+    "-DCOMPILER_RT_BUILD_SANITIZERS=OFF"
+    "-DCOMPILER_RT_BUILD_XRAY=OFF"
+    "-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
+    "-DCOMPILER_RT_BUILD_PROFILE=OFF"
+  ] ++ stdenv.lib.optionals (stdenv.hostPlatform.parsed.kernel.name == "none") [
+    "-DCOMPILER_RT_BAREMETAL_BUILD=ON"
+    "-DCOMPILER_RT_OS_DIR=baremetal"
+  ];
+
+  outputs = [ "out" "dev" ];
+
+  patches = [
+    ./compiler-rt-codesign.patch # Revert compiler-rt commit that makes codesign mandatory
+  ];# ++ stdenv.lib.optional stdenv.hostPlatform.isMusl ./sanitizers-nongnu.patch
+
+  # TSAN requires XPC on Darwin, which we have no public/free source files for. We can depend on the Apple frameworks
+  # to get it, but they're unfree. Since LLVM is rather central to the stdenv, we patch out TSAN support so that Hydra
+  # can build this. If we didn't do it, basically the entire nixpkgs on Darwin would have an unfree dependency and we'd
+  # get no binary cache for the entire platform. If you really find yourself wanting the TSAN, make this controllable by
+  # a flag and turn the flag off during the stdenv build.
+  postPatch = stdenv.lib.optionalString stdenv.isDarwin ''
+    substituteInPlace cmake/config-ix.cmake \
+      --replace 'set(COMPILER_RT_HAS_TSAN TRUE)' 'set(COMPILER_RT_HAS_TSAN FALSE)'
+  '' + stdenv.lib.optionalString (stdenv.hostPlatform.useLLVM or false) ''
+    substituteInPlace lib/builtins/int_util.c \
+      --replace "#include <stdlib.h>" ""
+    substituteInPlace lib/builtins/clear_cache.c \
+      --replace "#include <assert.h>" ""
+    substituteInPlace lib/builtins/cpu_model.c \
+      --replace "#include <assert.h>" ""
+  '';
+
+  # Hack around weird upsream RPATH bug
+  postInstall = stdenv.lib.optionalString (stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isWasm) ''
+    ln -s "$out/lib"/*/* "$out/lib"
+  '' + stdenv.lib.optionalString (stdenv.hostPlatform.useLLVM or false) ''
+    ln -s $out/lib/*/clang_rt.crtbegin-*.o $out/lib/crtbegin.o
+    ln -s $out/lib/*/clang_rt.crtend-*.o $out/lib/crtend.o
+    ln -s $out/lib/*/clang_rt.crtbegin_shared-*.o $out/lib/crtbeginS.o
+    ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/crtendS.o
+  '';
+
+  enableParallelBuilding = true;
+}
diff --git a/pkgs/development/compilers/llvm/9/default.nix b/pkgs/development/compilers/llvm/9/default.nix
new file mode 100644
index 000000000000..1590d180c3fd
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/default.nix
@@ -0,0 +1,197 @@
+{ lowPrio, newScope, pkgs, stdenv, cmake, libstdcxxHook
+, libxml2, python, isl, fetchurl, overrideCC, wrapCCWith, wrapBintoolsWith
+, buildLlvmTools # tools, but from the previous stage, for cross
+, targetLlvmLibraries # libraries, but from the next stage, for cross
+}:
+
+let
+  release_version = "9.0.0";
+  version = release_version; # differentiating these is important for rc's
+
+  fetch = name: sha256: fetchurl {
+    url = "https://releases.llvm.org/${release_version}/${name}-${version}.src.tar.xz";
+    inherit sha256;
+  };
+
+  clang-tools-extra_src = fetch "clang-tools-extra" "045cldmcfd8s33wyjlviifgpnw52yqicd6v4ysvdg4i96p78c77a";
+
+  tools = stdenv.lib.makeExtensible (tools: let
+    callPackage = newScope (tools // { inherit stdenv cmake libxml2 python isl release_version version fetch; });
+    mkExtraBuildCommands = cc: ''
+      rsrc="$out/resource-root"
+      mkdir "$rsrc"
+      ln -s "${cc}/lib/clang/${release_version}/include" "$rsrc"
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
+      echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
+    '' + stdenv.lib.optionalString (stdenv.targetPlatform.isLinux && tools.clang-unwrapped ? gcc && !(stdenv.targetPlatform.useLLVM or false)) ''
+      echo "--gcc-toolchain=${tools.clang-unwrapped.gcc}" >> $out/nix-support/cc-cflags
+    '';
+  in {
+
+    llvm = callPackage ./llvm.nix { };
+    llvm-polly = callPackage ./llvm.nix { enablePolly = true; };
+
+    clang-unwrapped = callPackage ./clang {
+      inherit clang-tools-extra_src;
+    };
+    clang-polly-unwrapped = callPackage ./clang {
+      inherit clang-tools-extra_src;
+      llvm = tools.llvm-polly;
+      enablePolly = true;
+    };
+
+    llvm-manpages = lowPrio (tools.llvm.override {
+      enableManpages = true;
+      python = pkgs.python;  # don't use python-boot
+    });
+
+    clang-manpages = lowPrio (tools.clang-unwrapped.override {
+      enableManpages = true;
+      python = pkgs.python;  # don't use python-boot
+    });
+
+    libclang = tools.clang-unwrapped.lib;
+
+    clang = if stdenv.cc.isGNU then tools.libstdcxxClang else tools.libcxxClang;
+
+    libstdcxxClang = wrapCCWith rec {
+      cc = tools.clang-unwrapped;
+      extraPackages = [
+        libstdcxxHook
+        targetLlvmLibraries.compiler-rt
+      ];
+      extraBuildCommands = mkExtraBuildCommands cc;
+    };
+
+    libcxxClang = wrapCCWith rec {
+      cc = tools.clang-unwrapped;
+      libcxx = targetLlvmLibraries.libcxx;
+      extraPackages = [
+        targetLlvmLibraries.libcxx
+        targetLlvmLibraries.libcxxabi
+        targetLlvmLibraries.compiler-rt
+      ];
+      extraBuildCommands = mkExtraBuildCommands cc;
+    };
+
+    lld = callPackage ./lld.nix {};
+
+    lldb = callPackage ./lldb.nix {};
+
+    # Below, is the LLVM bootstrapping logic. It handles building a
+    # fully LLVM toolchain from scratch. No GCC toolchain should be
+    # pulled in. As a consequence, it is very quick to build different
+    # targets provided by LLVM and we can also build for what GCC
+    # doesn’t support like LLVM. Probably we should move to some other
+    # file.
+
+    bintools = callPackage ./bintools.nix {};
+
+    lldClang = wrapCCWith rec {
+      cc = tools.clang-unwrapped;
+      libcxx = targetLlvmLibraries.libcxx;
+      bintools = wrapBintoolsWith {
+        inherit (tools) bintools;
+      };
+      extraPackages = [
+        targetLlvmLibraries.libcxx
+        targetLlvmLibraries.libcxxabi
+        targetLlvmLibraries.compiler-rt
+      ] ++ stdenv.lib.optionals (!stdenv.targetPlatform.isWasm) [
+        targetLlvmLibraries.libunwind
+      ];
+      extraBuildCommands = ''
+        echo "-target ${stdenv.targetPlatform.config}" >> $out/nix-support/cc-cflags
+        echo "-rtlib=compiler-rt -Wno-unused-command-line-argument" >> $out/nix-support/cc-cflags
+        echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
+      '' + stdenv.lib.optionalString (!stdenv.targetPlatform.isWasm) ''
+        echo "--unwindlib=libunwind" >> $out/nix-support/cc-cflags
+      '' + stdenv.lib.optionalString stdenv.targetPlatform.isWasm ''
+        echo "-fno-exceptions" >> $out/nix-support/cc-cflags
+      '' + mkExtraBuildCommands cc;
+    };
+
+    lldClangNoLibcxx = wrapCCWith rec {
+      cc = tools.clang-unwrapped;
+      libcxx = null;
+      bintools = wrapBintoolsWith {
+        inherit (tools) bintools;
+      };
+      extraPackages = [
+        targetLlvmLibraries.compiler-rt
+      ];
+      extraBuildCommands = ''
+        echo "-target ${stdenv.targetPlatform.config}" >> $out/nix-support/cc-cflags
+        echo "-rtlib=compiler-rt" >> $out/nix-support/cc-cflags
+        echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
+        echo "-nostdlib++" >> $out/nix-support/cc-cflags
+      '' + mkExtraBuildCommands cc;
+    };
+
+    lldClangNoLibc = wrapCCWith rec {
+      cc = tools.clang-unwrapped;
+      libcxx = null;
+      bintools = wrapBintoolsWith {
+        inherit (tools) bintools;
+        libc = null;
+      };
+      extraPackages = [
+        targetLlvmLibraries.compiler-rt
+      ];
+      extraBuildCommands = ''
+        echo "-target ${stdenv.targetPlatform.config}" >> $out/nix-support/cc-cflags
+        echo "-rtlib=compiler-rt" >> $out/nix-support/cc-cflags
+        echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
+      '' + mkExtraBuildCommands cc;
+    };
+
+    lldClangNoCompilerRt = wrapCCWith {
+      cc = tools.clang-unwrapped;
+      libcxx = null;
+      bintools = wrapBintoolsWith {
+        inherit (tools) bintools;
+        libc = null;
+      };
+      extraPackages = [ ];
+      extraBuildCommands = ''
+        echo "-nostartfiles" >> $out/nix-support/cc-cflags
+        echo "-target ${stdenv.targetPlatform.config}" >> $out/nix-support/cc-cflags
+      '';
+    };
+
+  });
+
+  libraries = stdenv.lib.makeExtensible (libraries: let
+    callPackage = newScope (libraries // buildLlvmTools // { inherit stdenv cmake libxml2 python isl release_version version fetch; });
+  in {
+
+    compiler-rt = callPackage ./compiler-rt.nix ({} //
+      (stdenv.lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
+        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoCompilerRt;
+      }));
+
+    stdenv = overrideCC stdenv buildLlvmTools.clang;
+
+    libcxxStdenv = overrideCC stdenv buildLlvmTools.libcxxClang;
+
+    libcxx = callPackage ./libc++ ({} //
+      (stdenv.lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
+        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
+      }));
+
+    libcxxabi = callPackage ./libc++abi.nix ({} //
+      (stdenv.lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
+        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
+        libunwind = libraries.libunwind;
+      }));
+
+    openmp = callPackage ./openmp.nix {};
+
+    libunwind = callPackage ./libunwind.nix ({} //
+      (stdenv.lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
+        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
+      }));
+
+  });
+
+in { inherit tools libraries; } // libraries // tools
diff --git a/pkgs/development/compilers/llvm/9/fix-test-on-non-x86-like-others.patch b/pkgs/development/compilers/llvm/9/fix-test-on-non-x86-like-others.patch
new file mode 100644
index 000000000000..e6c2f0406844
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/fix-test-on-non-x86-like-others.patch
@@ -0,0 +1,23 @@
+Index: test/tools/gold/X86/linkonce_odr_unnamed_addr.ll
+===================================================================
+diff --git a/test/tools/gold/X86/linkonce_odr_unnamed_addr.ll b/llvm/trunk/test/tools/gold/X86/linkonce_odr_unnamed_addr.ll
+--- a/test/tools/gold/X86/linkonce_odr_unnamed_addr.ll	(revision 372333)
++++ b/test/tools/gold/X86/linkonce_odr_unnamed_addr.ll	(working copy)
+@@ -3,7 +3,7 @@
+ 
+ ; RUN: opt -module-summary %s -o %t.o
+ ; RUN: opt -module-summary %p/Inputs/linkonce_odr_unnamed_addr.ll -o %t2.o
+-; RUN: %gold -plugin %llvmshlibdir/LLVMgold%shlibext \
++; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \
+ ; RUN:    --plugin-opt=save-temps \
+ ; RUN:    %t.o %t2.o -o %t3.o
+ ; RUN: llvm-dis %t.o.1.promote.bc -o - | FileCheck %s
+@@ -11,7 +11,7 @@
+ ; Now test when one module is a native object. In that case we must be
+ ; conservative and not auto hide.
+ ; RUN: llc %p/Inputs/linkonce_odr_unnamed_addr.ll -o %t2native.o -filetype=obj
+-; RUN: %gold -plugin %llvmshlibdir/LLVMgold%shlibext \
++; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \
+ ; RUN:    --plugin-opt=save-temps \
+ ; RUN:    %t.o %t2native.o -o %t3.o
+ ; RUN: llvm-dis %t.o.1.promote.bc -o - | FileCheck %s --check-prefix=NOSUMMARY
diff --git a/pkgs/development/compilers/llvm/9/libc++/default.nix b/pkgs/development/compilers/llvm/9/libc++/default.nix
new file mode 100644
index 000000000000..daf8ed5a9ae5
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/libc++/default.nix
@@ -0,0 +1,55 @@
+{ lib, stdenv, fetch, cmake, python, libcxxabi, fixDarwinDylibNames, version
+, enableShared ? true }:
+
+stdenv.mkDerivation {
+  pname = "libc++";
+  inherit version;
+
+  src = fetch "libcxx" "136j3v7il9aq8wyp48klx6sifnl5asj4lf5c8yx08cjx5fbn4h9w";
+
+  postUnpack = ''
+    unpackFile ${libcxxabi.src}
+    export LIBCXXABI_INCLUDE_DIR="$PWD/$(ls -d libcxxabi-${version}*)/include"
+  '';
+
+  patches = stdenv.lib.optional stdenv.hostPlatform.isMusl ../../libcxx-0001-musl-hacks.patch;
+
+  preConfigure = ''
+    # Get headers from the cxxabi source so we can see private headers not installed by the cxxabi package
+    cmakeFlagsArray=($cmakeFlagsArray -DLIBCXX_CXX_ABI_INCLUDE_PATHS="$LIBCXXABI_INCLUDE_DIR")
+  '' + lib.optionalString stdenv.hostPlatform.isMusl ''
+    patchShebangs utils/cat_files.py
+  '';
+  nativeBuildInputs = [ cmake ]
+    ++ stdenv.lib.optional (stdenv.hostPlatform.isMusl || stdenv.hostPlatform.isWasi) python;
+
+  buildInputs = [ libcxxabi ] ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
+
+  cmakeFlags = [
+    "-DLIBCXX_LIBCXXABI_LIB_PATH=${libcxxabi}/lib"
+    "-DLIBCXX_LIBCPPABI_VERSION=2"
+    "-DLIBCXX_CXX_ABI=libcxxabi"
+  ] ++ stdenv.lib.optional (stdenv.hostPlatform.isMusl || stdenv.hostPlatform.isWasi) "-DLIBCXX_HAS_MUSL_LIBC=1"
+    ++ stdenv.lib.optional (stdenv.hostPlatform.useLLVM or false) "-DLIBCXX_USE_COMPILER_RT=ON"
+    ++ stdenv.lib.optional stdenv.hostPlatform.isWasm [
+      "-DLIBCXX_ENABLE_THREADS=OFF"
+      "-DLIBCXX_ENABLE_FILESYSTEM=OFF"
+      "-DLIBCXX_ENABLE_EXCEPTIONS=OFF"
+    ] ++ stdenv.lib.optional (!enableShared) "-DLIBCXX_ENABLE_SHARED=OFF";
+
+  enableParallelBuilding = true;
+
+  linkCxxAbi = stdenv.isLinux;
+
+  setupHooks = [
+    ../../../../../build-support/setup-hooks/role.bash
+    ./setup-hook.sh
+  ];
+
+  meta = {
+    homepage = http://libcxx.llvm.org/;
+    description = "A new implementation of the C++ standard library, targeting C++11";
+    license = with stdenv.lib.licenses; [ ncsa mit ];
+    platforms = stdenv.lib.platforms.all;
+  };
+}
diff --git a/pkgs/development/compilers/llvm/9/libc++/setup-hook.sh b/pkgs/development/compilers/llvm/9/libc++/setup-hook.sh
new file mode 100644
index 000000000000..6611259165ae
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/libc++/setup-hook.sh
@@ -0,0 +1,6 @@
+# See pkgs/build-support/setup-hooks/role.bash
+getHostRole
+
+linkCxxAbi="@linkCxxAbi@"
+export NIX_${role_pre}CXXSTDLIB_COMPILE+=" -isystem @out@/include/c++/v1"
+export NIX_${role_pre}CXXSTDLIB_LINK=" -stdlib=libc++${linkCxxAbi:+" -lc++abi"}"
diff --git a/pkgs/development/compilers/llvm/9/libc++abi.nix b/pkgs/development/compilers/llvm/9/libc++abi.nix
new file mode 100644
index 000000000000..7afff991e75d
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/libc++abi.nix
@@ -0,0 +1,67 @@
+{ stdenv, cmake, fetch, libcxx, libunwind, llvm, version
+, enableShared ? true }:
+
+stdenv.mkDerivation {
+  pname = "libc++abi";
+  inherit version;
+
+  src = fetch "libcxxabi" "1s9haplqv8ashlsdx2psxiqxh50gqk2jp2vz5yn0djb56mw42l37";
+
+  nativeBuildInputs = [ cmake ];
+  buildInputs = stdenv.lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD && !stdenv.hostPlatform.isWasm) libunwind;
+
+  cmakeFlags = stdenv.lib.optionals (stdenv.hostPlatform.useLLVM or false) [
+    "-DLLVM_ENABLE_LIBCXX=ON"
+    "-DLIBCXXABI_USE_LLVM_UNWINDER=ON"
+  ] ++ stdenv.lib.optionals stdenv.hostPlatform.isWasm [
+    "-DLIBCXXABI_ENABLE_THREADS=OFF"
+    "-DLIBCXXABI_ENABLE_EXCEPTIONS=OFF"
+  ] ++ stdenv.lib.optionals (!enableShared) [
+    "-DLIBCXXABI_ENABLE_SHARED=OFF"
+  ];
+
+  patches = [ ./libcxxabi-no-threads.patch ];
+
+  postUnpack = ''
+    unpackFile ${libcxx.src}
+    unpackFile ${llvm.src}
+    cmakeFlags+=" -DLLVM_PATH=$PWD/$(ls -d llvm-*) -DLIBCXXABI_LIBCXX_PATH=$PWD/$(ls -d libcxx-*)"
+  '' + stdenv.lib.optionalString stdenv.isDarwin ''
+    export TRIPLE=x86_64-apple-darwin
+  '' + stdenv.lib.optionalString stdenv.hostPlatform.isMusl ''
+    patch -p1 -d $(ls -d libcxx-*) -i ${../libcxx-0001-musl-hacks.patch}
+  '' + stdenv.lib.optionalString stdenv.hostPlatform.isWasm ''
+    patch -p1 -d $(ls -d llvm-*) -i ${./libcxxabi-wasm.patch}
+  '';
+
+  installPhase = if stdenv.isDarwin
+    then ''
+      for file in lib/*.dylib; do
+        # this should be done in CMake, but having trouble figuring out
+        # the magic combination of necessary CMake variables
+        # if you fancy a try, take a look at
+        # http://www.cmake.org/Wiki/CMake_RPATH_handling
+        install_name_tool -id $out/$file $file
+      done
+      make install
+      install -d 755 $out/include
+      install -m 644 ../include/*.h $out/include
+    ''
+    else ''
+      install -d -m 755 $out/include $out/lib
+      install -m 644 lib/libc++abi.a $out/lib
+      install -m 644 ../include/cxxabi.h $out/include
+    '' + stdenv.lib.optionalString enableShared ''
+      install -m 644 lib/libc++abi.so.1.0 $out/lib
+      ln -s libc++abi.so.1.0 $out/lib/libc++abi.so
+      ln -s libc++abi.so.1.0 $out/lib/libc++abi.so.1
+    '';
+
+  meta = {
+    homepage = http://libcxxabi.llvm.org/;
+    description = "A new implementation of low level support for a standard C++ library";
+    license = with stdenv.lib.licenses; [ ncsa mit ];
+    maintainers = with stdenv.lib.maintainers; [ vlstill ];
+    platforms = stdenv.lib.platforms.all;
+  };
+}
diff --git a/pkgs/development/compilers/llvm/9/libcxxabi-no-threads.patch b/pkgs/development/compilers/llvm/9/libcxxabi-no-threads.patch
new file mode 100644
index 000000000000..787f3e16500e
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/libcxxabi-no-threads.patch
@@ -0,0 +1,12 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 4138acf..41b4763 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -362,6 +362,7 @@ if (NOT LIBCXXABI_ENABLE_THREADS)
+                         " is also set to ON.")
+   endif()
+   add_definitions(-D_LIBCXXABI_HAS_NO_THREADS)
++  add_definitions(-D_LIBCPP_HAS_NO_THREADS)
+ endif()
+ 
+ if (LIBCXXABI_HAS_EXTERNAL_THREAD_API)
diff --git a/pkgs/development/compilers/llvm/9/libcxxabi-wasm.patch b/pkgs/development/compilers/llvm/9/libcxxabi-wasm.patch
new file mode 100644
index 000000000000..4ebfe46aa813
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/libcxxabi-wasm.patch
@@ -0,0 +1,16 @@
+diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
+index 15497d405e0..33f7f18193a 100644
+--- a/cmake/modules/HandleLLVMOptions.cmake
++++ b/cmake/modules/HandleLLVMOptions.cmake
+@@ -127,7 +127,10 @@ else(WIN32)
+       set(LLVM_HAVE_LINK_VERSION_SCRIPT 1)
+     endif()
+   else(FUCHSIA OR UNIX)
+-    MESSAGE(SEND_ERROR "Unable to determine platform")
++    if(${CMAKE_SYSTEM_NAME} MATCHES "Wasi")
++    else()
++      MESSAGE(SEND_ERROR "Unable to determine platform")
++    endif()
+   endif(FUCHSIA OR UNIX)
+ endif(WIN32)
+ 
diff --git a/pkgs/development/compilers/llvm/9/libunwind.nix b/pkgs/development/compilers/llvm/9/libunwind.nix
new file mode 100644
index 000000000000..5eba9e03c782
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/libunwind.nix
@@ -0,0 +1,14 @@
+{ stdenv, version, fetch, cmake, fetchpatch, enableShared ? true }:
+
+stdenv.mkDerivation rec {
+  pname = "libunwind";
+  inherit version;
+
+  src = fetch pname "1chd1nz4bscrs6qa7p8sqgk5df86ll0frv0f451vhks2w44qsslp";
+
+  nativeBuildInputs = [ cmake ];
+
+  enableParallelBuilding = true;
+
+  cmakeFlags = stdenv.lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
+}
diff --git a/pkgs/development/compilers/llvm/9/lld.nix b/pkgs/development/compilers/llvm/9/lld.nix
new file mode 100644
index 000000000000..c5baef4357ec
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/lld.nix
@@ -0,0 +1,33 @@
+{ stdenv
+, fetch
+, cmake
+, libxml2
+, llvm
+, version
+}:
+
+stdenv.mkDerivation rec {
+  pname = "lld";
+  inherit version;
+
+  src = fetch pname "14cgd34gr826qpxzhrkbz6qgm8ymds0hrsiznwzp42ax4f5p9iii";
+
+  nativeBuildInputs = [ cmake ];
+  buildInputs = [ llvm libxml2 ];
+
+  outputs = [ "out" "dev" ];
+
+  enableParallelBuilding = true;
+
+  postInstall = ''
+    moveToOutput include "$dev"
+    moveToOutput lib "$dev"
+  '';
+
+  meta = {
+    description = "The LLVM Linker";
+    homepage    = http://lld.llvm.org/;
+    license     = stdenv.lib.licenses.ncsa;
+    platforms   = stdenv.lib.platforms.all;
+  };
+}
diff --git a/pkgs/development/compilers/llvm/9/lldb-procfs.patch b/pkgs/development/compilers/llvm/9/lldb-procfs.patch
new file mode 100644
index 000000000000..b075dbaeee0a
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/lldb-procfs.patch
@@ -0,0 +1,31 @@
+--- a/source/Plugins/Process/Linux/Procfs.h
++++ b/source/Plugins/Process/Linux/Procfs.h
+@@ -11,21 +11,12 @@
+ // sys/procfs.h on Android/Linux for all supported architectures.
+ 
+ #include <sys/ptrace.h>
++#include <asm/ptrace.h>
+ 
+-#ifdef __ANDROID__
+-#if defined(__arm64__) || defined(__aarch64__)
+-typedef unsigned long elf_greg_t;
+-typedef elf_greg_t
+-    elf_gregset_t[(sizeof(struct user_pt_regs) / sizeof(elf_greg_t))];
+-typedef struct user_fpsimd_state elf_fpregset_t;
+-#ifndef NT_FPREGSET
+-#define NT_FPREGSET NT_PRFPREG
+-#endif // NT_FPREGSET
+-#elif defined(__mips__)
+-#ifndef NT_FPREGSET
+-#define NT_FPREGSET NT_PRFPREG
+-#endif // NT_FPREGSET
+-#endif
+-#else // __ANDROID__
++#if !defined(__GLIBC__) && defined(__powerpc__)
++#define pt_regs musl_pt_regs
++#include <sys/procfs.h>
++#undef pt_regs
++#else
+ #include <sys/procfs.h>
+-#endif // __ANDROID__
++#endif
diff --git a/pkgs/development/compilers/llvm/9/lldb.nix b/pkgs/development/compilers/llvm/9/lldb.nix
new file mode 100644
index 000000000000..ee281384c403
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/lldb.nix
@@ -0,0 +1,72 @@
+{ stdenv
+, fetch
+, cmake
+, zlib
+, ncurses
+, swig
+, which
+, libedit
+, libxml2
+, llvm
+, clang-unwrapped
+, python
+, version
+, darwin
+, lit
+}:
+
+stdenv.mkDerivation rec {
+  pname = "lldb";
+  inherit version;
+
+  src = fetch pname "1507dl0xw03nppxpz2xsq4s30jdbkplx4w14za54ngqm3xm2yk0y";
+
+  patches = [ ./lldb-procfs.patch ];
+
+  nativeBuildInputs = [ cmake python which swig lit ];
+  buildInputs = [
+    ncurses
+    zlib
+    libedit
+    libxml2
+    llvm
+  ]
+  ++ stdenv.lib.optionals stdenv.isDarwin [
+    darwin.libobjc
+    darwin.apple_sdk.libs.xpc
+    darwin.apple_sdk.frameworks.Foundation
+    darwin.bootstrap_cmds
+    darwin.apple_sdk.frameworks.Carbon
+    darwin.apple_sdk.frameworks.Cocoa
+  ];
+
+  CXXFLAGS = "-fno-rtti";
+  hardeningDisable = [ "format" ];
+
+  cmakeFlags = [
+    "-DLLDB_CODESIGN_IDENTITY=" # codesigning makes nondeterministic
+    "-DClang_DIR=${clang-unwrapped}/lib/cmake"
+    "-DLLVM_EXTERNAL_LIT=${lit}/bin/lit"
+  ];
+
+  enableParallelBuilding = true;
+
+  postInstall = ''
+    # man page
+    mkdir -p $out/share/man/man1
+    install ../docs/lldb.1 -t $out/share/man/man1/
+
+    # Editor support
+    # vscode:
+    install -D ../tools/lldb-vscode/package.json $out/share/vscode/extensions/llvm-org.lldb-vscode-0.1.0/package.json
+    mkdir -p $out/share/vscode/extensions/llvm-org.lldb-vscode-0.1.0/bin
+    ln -s $out/bin/lldb-vscode $out/share/vscode/extensions/llvm-org.lldb-vscode-0.1.0/bin
+  '';
+
+  meta = with stdenv.lib; {
+    description = "A next-generation high-performance debugger";
+    homepage = http://llvm.org/;
+    license = licenses.ncsa;
+    platforms = platforms.all;
+  };
+}
diff --git a/pkgs/development/compilers/llvm/9/llvm-outputs.patch b/pkgs/development/compilers/llvm/9/llvm-outputs.patch
new file mode 100644
index 000000000000..40096fa3497f
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/llvm-outputs.patch
@@ -0,0 +1,26 @@
+diff --git a/tools/llvm-config/llvm-config.cpp b/tools/llvm-config/llvm-config.cpp
+index 94d426b..37f7794 100644
+--- a/tools/llvm-config/llvm-config.cpp
++++ b/tools/llvm-config/llvm-config.cpp
+@@ -333,6 +333,21 @@ int main(int argc, char **argv) {
+     ActiveIncludeOption = "-I" + ActiveIncludeDir;
+   }
+ 
++  /// Nix-specific multiple-output handling: override ActiveLibDir if --link-shared
++  if (!IsInDevelopmentTree) {
++    bool WantShared = true;
++    for (int i = 1; i < argc; ++i) {
++      StringRef Arg = argv[i];
++      if (Arg == "--link-shared")
++        WantShared = true;
++      else if (Arg == "--link-static")
++        WantShared = false; // the last one wins
++    }
++
++    if (WantShared)
++      ActiveLibDir = std::string("@lib@") + "/lib" + LLVM_LIBDIR_SUFFIX;
++  }
++
+   /// We only use `shared library` mode in cases where the static library form
+   /// of the components provided are not available; note however that this is
+   /// skipped if we're run from within the build dir. However, once installed,
diff --git a/pkgs/development/compilers/llvm/9/llvm.nix b/pkgs/development/compilers/llvm/9/llvm.nix
new file mode 100644
index 000000000000..9bc7e1fc20ba
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/llvm.nix
@@ -0,0 +1,182 @@
+{ stdenv
+, fetch
+, cmake
+, python
+, libffi
+, libbfd
+, libpfm
+, libxml2
+, ncurses
+, version
+, release_version
+, zlib
+, buildPackages
+, debugVersion ? false
+, enableManpages ? false
+, enableSharedLibraries ? true
+, enablePFM ? !(stdenv.isDarwin
+  || stdenv.isAarch64 # broken for Ampere eMAG 8180 (c2.large.arm on Packet) #56245
+)
+, enablePolly ? false
+}:
+
+let
+  inherit (stdenv.lib) optional optionals optionalString;
+
+  # Used when creating a version-suffixed symlink of libLLVM.dylib
+  shortVersion = with stdenv.lib;
+    concatStringsSep "." (take 1 (splitString "." release_version));
+
+in stdenv.mkDerivation (rec {
+  pname = "llvm";
+  inherit version;
+
+  src = fetch pname "117ymdz1by2nkfq1c2p9m4050dp848kbjbiv6nsfj8hzy9f5d86n";
+  polly_src = fetch "polly" "0cyl2gsibf1dhqvkyw1qb0f8q58ib6cihzyh4f9kj9g77ll95ym4";
+
+  unpackPhase = ''
+    unpackFile $src
+    mv llvm-${version}* llvm
+    sourceRoot=$PWD/llvm
+  '' + optionalString enablePolly ''
+    unpackFile $polly_src
+    mv polly-* $sourceRoot/tools/polly
+  '';
+
+  outputs = [ "out" "python" ]
+    ++ optional enableSharedLibraries "lib";
+
+  nativeBuildInputs = [ cmake python ]
+    ++ optionals enableManpages [ python.pkgs.sphinx python.pkgs.recommonmark ];
+
+  buildInputs = [ libxml2 libffi ]
+    ++ optional enablePFM libpfm; # exegesis
+
+  propagatedBuildInputs = [ ncurses zlib ];
+
+  postPatch = optionalString stdenv.isDarwin ''
+    substituteInPlace cmake/modules/AddLLVM.cmake \
+      --replace 'set(_install_name_dir INSTALL_NAME_DIR "@rpath")' "set(_install_name_dir)" \
+      --replace 'set(_install_rpath "@loader_path/../lib" ''${extra_libdir})' ""
+  ''
+  # Patch llvm-config to return correct library path based on --link-{shared,static}.
+  + optionalString (enableSharedLibraries) ''
+    substitute '${./llvm-outputs.patch}' ./llvm-outputs.patch --subst-var lib
+    patch -p1 < ./llvm-outputs.patch
+  '' + ''
+    # FileSystem permissions tests fail with various special bits
+    substituteInPlace unittests/Support/CMakeLists.txt \
+      --replace "Path.cpp" ""
+    rm unittests/Support/Path.cpp
+  '' + optionalString stdenv.hostPlatform.isMusl ''
+    patch -p1 -i ${../TLI-musl.patch}
+    substituteInPlace unittests/Support/CMakeLists.txt \
+      --replace "add_subdirectory(DynamicLibrary)" ""
+    rm unittests/Support/DynamicLibrary/DynamicLibraryTest.cpp
+    # valgrind unhappy with musl or glibc, but fails w/musl only
+    rm test/CodeGen/AArch64/wineh4.mir
+  '' + ''
+    patchShebangs test/BugPoint/compile-custom.ll.py
+
+    # Fix test so that no extra locale files are needed
+    substituteInPlace test/tools/llvm-ar/mri-utf8.test \
+      --replace en_US.UTF-8 C.UTF-8
+
+    # Fix x86 gold test on non-x86 platforms
+    # (similar fix made to others in this directory previously, FWIW)
+    patch -p1 -i  ${./fix-test-on-non-x86-like-others.patch}
+  '';
+
+  # hacky fix: created binaries need to be run before installation
+  preBuild = ''
+    mkdir -p $out/
+    ln -sv $PWD/lib $out
+  '';
+
+  cmakeFlags = with stdenv; [
+    "-DCMAKE_BUILD_TYPE=${if debugVersion then "Debug" else "Release"}"
+    "-DLLVM_INSTALL_UTILS=ON"  # Needed by rustc
+    "-DLLVM_BUILD_TESTS=ON"
+    "-DLLVM_ENABLE_FFI=ON"
+    "-DLLVM_ENABLE_RTTI=ON"
+    "-DLLVM_HOST_TRIPLE=${stdenv.hostPlatform.config}"
+    "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.hostPlatform.config}"
+    "-DLLVM_ENABLE_DUMP=ON"
+  ] ++ optionals enableSharedLibraries [
+    "-DLLVM_LINK_LLVM_DYLIB=ON"
+  ] ++ optionals enableManpages [
+    "-DLLVM_BUILD_DOCS=ON"
+    "-DLLVM_ENABLE_SPHINX=ON"
+    "-DSPHINX_OUTPUT_MAN=ON"
+    "-DSPHINX_OUTPUT_HTML=OFF"
+    "-DSPHINX_WARNINGS_AS_ERRORS=OFF"
+  ] ++ optionals (!isDarwin) [
+    "-DLLVM_BINUTILS_INCDIR=${libbfd.dev}/include"
+  ] ++ optionals (isDarwin) [
+    "-DLLVM_ENABLE_LIBCXX=ON"
+    "-DCAN_TARGET_i386=false"
+  ] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
+    "-DCMAKE_CROSSCOMPILING=True"
+    "-DLLVM_TABLEGEN=${buildPackages.llvm_7}/bin/llvm-tblgen"
+  ];
+
+  postBuild = ''
+    rm -fR $out
+  '';
+
+  preCheck = ''
+    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$PWD/lib
+  '';
+
+  postInstall = ''
+    mkdir -p $python/share
+    mv $out/share/opt-viewer $python/share/opt-viewer
+  ''
+  + optionalString enableSharedLibraries ''
+    moveToOutput "lib/libLLVM-*" "$lib"
+    moveToOutput "lib/libLLVM${stdenv.hostPlatform.extensions.sharedLibrary}" "$lib"
+    substituteInPlace "$out/lib/cmake/llvm/LLVMExports-${if debugVersion then "debug" else "release"}.cmake" \
+      --replace "\''${_IMPORT_PREFIX}/lib/libLLVM-" "$lib/lib/libLLVM-"
+  ''
+  + optionalString (stdenv.isDarwin && enableSharedLibraries) ''
+    substituteInPlace "$out/lib/cmake/llvm/LLVMExports-${if debugVersion then "debug" else "release"}.cmake" \
+      --replace "\''${_IMPORT_PREFIX}/lib/libLLVM.dylib" "$lib/lib/libLLVM.dylib"
+    ln -s $lib/lib/libLLVM.dylib $lib/lib/libLLVM-${shortVersion}.dylib
+    ln -s $lib/lib/libLLVM.dylib $lib/lib/libLLVM-${release_version}.dylib
+  '';
+
+  doCheck = stdenv.isLinux && (!stdenv.isx86_32);
+
+  checkTarget = "check-all";
+
+  enableParallelBuilding = true;
+
+  meta = {
+    description = "Collection of modular and reusable compiler and toolchain technologies";
+    homepage    = http://llvm.org/;
+    license     = stdenv.lib.licenses.ncsa;
+    maintainers = with stdenv.lib.maintainers; [ lovek323 raskin dtzWill ];
+    platforms   = stdenv.lib.platforms.all;
+  };
+} // stdenv.lib.optionalAttrs enableManpages {
+  pname = "llvm-manpages";
+
+  buildPhase = ''
+    make docs-llvm-man
+  '';
+
+  propagatedBuildInputs = [];
+
+  installPhase = ''
+    make -C docs install
+  '';
+
+  postPatch = null;
+  postInstall = null;
+
+  outputs = [ "out" ];
+
+  doCheck = false;
+
+  meta.description = "man pages for LLVM ${version}";
+})
diff --git a/pkgs/development/compilers/llvm/9/openmp.nix b/pkgs/development/compilers/llvm/9/openmp.nix
new file mode 100644
index 000000000000..a511aed2eb8c
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/openmp.nix
@@ -0,0 +1,26 @@
+{ stdenv
+, fetch
+, cmake
+, llvm
+, perl
+, version
+}:
+
+stdenv.mkDerivation rec {
+  pname = "openmp";
+  inherit version;
+
+  src = fetch pname "0nrv9np134b7c483jnq786spy3hbpj11d7g21g67cqq66c8ynycr";
+
+  nativeBuildInputs = [ cmake perl ];
+  buildInputs = [ llvm ];
+
+  enableParallelBuilding = true;
+
+  meta = {
+    description = "Components required to build an executable OpenMP program";
+    homepage    = http://openmp.llvm.org/;
+    license     = stdenv.lib.licenses.mit;
+    platforms   = stdenv.lib.platforms.all;
+  };
+}
diff --git a/pkgs/development/compilers/llvm/9/sanitizers-nongnu.patch b/pkgs/development/compilers/llvm/9/sanitizers-nongnu.patch
new file mode 100644
index 000000000000..1f2ac97818eb
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/sanitizers-nongnu.patch
@@ -0,0 +1,412 @@
+From f7a253f8f85d0f49df6b73996737a3e84ac64236 Mon Sep 17 00:00:00 2001
+From: Will Dietz <w@wdtz.org>
+Date: Mon, 24 Sep 2018 11:17:25 -0500
+Subject: [PATCH] Ported to 7.0, taken from gentoo-musl project.
+
+------
+Ported to compiler-rt-sanitizers-5.0.0. Taken from
+
+https://gist.githubusercontent.com/pwaller/2337f3290f12634cad3e3730cff0a6c1/raw/83c87a8585e2f9662494db5662e5361beb093c26/nongnu.patch
+Signed-off-by: Jory A. Pratt <anarchy@gentoo.org>
+
+Taken from gentoo-musl project, with a few additional minor fixes.
+---
+ lib/asan/asan_linux.cc                        |  4 +-
+ lib/interception/interception_linux.cc        |  2 +-
+ lib/interception/interception_linux.h         |  2 +-
+ lib/msan/msan_linux.cc                        |  2 +-
+ lib/sanitizer_common/sanitizer_allocator.cc   |  2 +-
+ .../sanitizer_common_interceptors_ioctl.inc   |  4 +-
+ .../sanitizer_common_syscalls.inc             |  2 +-
+ lib/sanitizer_common/sanitizer_linux.cc       |  8 +++-
+ .../sanitizer_linux_libcdep.cc                | 10 ++---
+ lib/sanitizer_common/sanitizer_platform.h     |  6 +++
+ .../sanitizer_platform_interceptors.h         |  4 +-
+ .../sanitizer_platform_limits_posix.cc        | 37 +++++++++++--------
+ lib/tsan/rtl/tsan_platform_linux.cc           |  2 +-
+ 13 files changed, 51 insertions(+), 34 deletions(-)
+
+diff --git a/lib/asan/asan_linux.cc b/lib/asan/asan_linux.cc
+index 625f32d40..73cf77aca 100644
+--- a/lib/asan/asan_linux.cc
++++ b/lib/asan/asan_linux.cc
+@@ -46,7 +46,7 @@
+ #include <link.h>
+ #endif
+ 
+-#if SANITIZER_ANDROID || SANITIZER_FREEBSD || SANITIZER_SOLARIS
++#if SANITIZER_ANDROID || SANITIZER_FREEBSD || SANITIZER_SOLARIS || SANITIZER_NONGNU
+ #include <ucontext.h>
+ extern "C" void* _DYNAMIC;
+ #elif SANITIZER_NETBSD
+@@ -139,7 +139,7 @@ void AsanApplyToGlobals(globals_op_fptr op, const void *needle) {
+   UNIMPLEMENTED();
+ }
+ 
+-#if SANITIZER_ANDROID
++#if SANITIZER_ANDROID || SANITIZER_NONGNU
+ // FIXME: should we do anything for Android?
+ void AsanCheckDynamicRTPrereqs() {}
+ void AsanCheckIncompatibleRT() {}
+diff --git a/lib/interception/interception_linux.cc b/lib/interception/interception_linux.cc
+index 26bfcd8f6..529b234f7 100644
+--- a/lib/interception/interception_linux.cc
++++ b/lib/interception/interception_linux.cc
+@@ -43,7 +43,7 @@ bool GetRealFunctionAddress(const char *func_name, uptr *func_addr,
+ }
+ 
+ // Android and Solaris do not have dlvsym
+-#if !SANITIZER_ANDROID && !SANITIZER_SOLARIS && !SANITIZER_OPENBSD
++#if !SANITIZER_ANDROID && !SANITIZER_SOLARIS && !SANITIZER_OPENBSD && !SANITIZER_NONGNU
+ void *GetFuncAddrVer(const char *func_name, const char *ver) {
+   return dlvsym(RTLD_NEXT, func_name, ver);
+ }
+diff --git a/lib/interception/interception_linux.h b/lib/interception/interception_linux.h
+index 942c25609..24a4d5080 100644
+--- a/lib/interception/interception_linux.h
++++ b/lib/interception/interception_linux.h
+@@ -36,7 +36,7 @@ void *GetFuncAddrVer(const char *func_name, const char *ver);
+       (::__interception::uptr) & WRAP(func))
+ 
+ // Android,  Solaris and OpenBSD do not have dlvsym
+-#if !SANITIZER_ANDROID && !SANITIZER_SOLARIS && !SANITIZER_OPENBSD
++#if !SANITIZER_ANDROID && !SANITIZER_SOLARIS && !SANITIZER_OPENBSD && !SANITIZER_NONGNU
+ #define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
+   (::__interception::real_##func = (func##_f)(                \
+        unsigned long)::__interception::GetFuncAddrVer(#func, symver))
+diff --git a/lib/msan/msan_linux.cc b/lib/msan/msan_linux.cc
+index 385a650c4..6e30a8ce9 100644
+--- a/lib/msan/msan_linux.cc
++++ b/lib/msan/msan_linux.cc
+@@ -13,7 +13,7 @@
+ //===----------------------------------------------------------------------===//
+ 
+ #include "sanitizer_common/sanitizer_platform.h"
+-#if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD
++#if SANITIZER_FREEBSD || (SANITIZER_LINUX && !SANITIZER_NONGNU) || SANITIZER_NETBSD
+ 
+ #include "msan.h"
+ #include "msan_report.h"
+diff --git a/lib/sanitizer_common/sanitizer_allocator.cc b/lib/sanitizer_common/sanitizer_allocator.cc
+index 6bfd5e5ee..048f6154f 100644
+--- a/lib/sanitizer_common/sanitizer_allocator.cc
++++ b/lib/sanitizer_common/sanitizer_allocator.cc
+@@ -27,7 +27,7 @@ const char *SecondaryAllocatorName = "LargeMmapAllocator";
+ 
+ // ThreadSanitizer for Go uses libc malloc/free.
+ #if SANITIZER_GO || defined(SANITIZER_USE_MALLOC)
+-# if SANITIZER_LINUX && !SANITIZER_ANDROID
++# if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+ extern "C" void *__libc_malloc(uptr size);
+ #  if !SANITIZER_GO
+ extern "C" void *__libc_memalign(uptr alignment, uptr size);
+diff --git a/lib/sanitizer_common/sanitizer_common_interceptors_ioctl.inc b/lib/sanitizer_common/sanitizer_common_interceptors_ioctl.inc
+index 2d633c173..b6eb23116 100644
+--- a/lib/sanitizer_common/sanitizer_common_interceptors_ioctl.inc
++++ b/lib/sanitizer_common/sanitizer_common_interceptors_ioctl.inc
+@@ -104,7 +104,7 @@ static void ioctl_table_fill() {
+   _(SIOCGETVIFCNT, WRITE, struct_sioc_vif_req_sz);
+ #endif
+ 
+-#if SANITIZER_LINUX
++#if SANITIZER_LINUX && !SANITIZER_NONGNU
+   // Conflicting request ids.
+   // _(CDROMAUDIOBUFSIZ, NONE, 0);
+   // _(SNDCTL_TMR_CONTINUE, NONE, 0);
+@@ -365,7 +365,7 @@ static void ioctl_table_fill() {
+   _(VT_WAITACTIVE, NONE, 0);
+ #endif
+ 
+-#if SANITIZER_LINUX && !SANITIZER_ANDROID
++#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+   // _(SIOCDEVPLIP, WRITE, struct_ifreq_sz); // the same as EQL_ENSLAVE
+   _(CYGETDEFTHRESH, WRITE, sizeof(int));
+   _(CYGETDEFTIMEOUT, WRITE, sizeof(int));
+diff --git a/lib/sanitizer_common/sanitizer_common_syscalls.inc b/lib/sanitizer_common/sanitizer_common_syscalls.inc
+index 469c8eb7e..24f87867d 100644
+--- a/lib/sanitizer_common/sanitizer_common_syscalls.inc
++++ b/lib/sanitizer_common/sanitizer_common_syscalls.inc
+@@ -2038,7 +2038,7 @@ POST_SYSCALL(setrlimit)(long res, long resource, void *rlim) {
+   }
+ }
+ 
+-#if !SANITIZER_ANDROID
++#if !SANITIZER_ANDROID && !SANITIZER_NONGNU
+ PRE_SYSCALL(prlimit64)(long pid, long resource, const void *new_rlim,
+                        void *old_rlim) {
+   if (new_rlim) PRE_READ(new_rlim, struct_rlimit64_sz);
+diff --git a/lib/sanitizer_common/sanitizer_linux.cc b/lib/sanitizer_common/sanitizer_linux.cc
+index 96d6c1eff..9e2b7fb9d 100644
+--- a/lib/sanitizer_common/sanitizer_linux.cc
++++ b/lib/sanitizer_common/sanitizer_linux.cc
+@@ -541,13 +541,13 @@ const char *GetEnv(const char *name) {
+ #endif
+ }
+ 
+-#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD && !SANITIZER_OPENBSD
++#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD && !SANITIZER_OPENBSD && !SANITIZER_NONGNU
+ extern "C" {
+ SANITIZER_WEAK_ATTRIBUTE extern void *__libc_stack_end;
+ }
+ #endif
+ 
+-#if !SANITIZER_GO && !SANITIZER_FREEBSD && !SANITIZER_NETBSD &&                \
++#if (!SANITIZER_GO || SANITIZER_NONGNU) && !SANITIZER_FREEBSD && !SANITIZER_NETBSD &&                \
+     !SANITIZER_OPENBSD
+ static void ReadNullSepFileToArray(const char *path, char ***arr,
+                                    int arr_size) {
+@@ -590,6 +590,10 @@ static void GetArgsAndEnv(char ***argv, char ***envp) {
+ #elif SANITIZER_NETBSD
+   *argv = __ps_strings->ps_argvstr;
+   *envp = __ps_strings->ps_envstr;
++#elif SANITIZER_NONGNU
++    static const int kMaxArgv = 2000, kMaxEnvp = 2000;
++    ReadNullSepFileToArray("/proc/self/cmdline", argv, kMaxArgv);
++    ReadNullSepFileToArray("/proc/self/environ", envp, kMaxEnvp);
+ #else // SANITIZER_FREEBSD
+ #if !SANITIZER_GO
+   if (&__libc_stack_end) {
+diff --git a/lib/sanitizer_common/sanitizer_linux_libcdep.cc b/lib/sanitizer_common/sanitizer_linux_libcdep.cc
+index 4962ff832..438f94dbe 100644
+--- a/lib/sanitizer_common/sanitizer_linux_libcdep.cc
++++ b/lib/sanitizer_common/sanitizer_linux_libcdep.cc
+@@ -179,7 +179,7 @@ __attribute__((unused)) static bool GetLibcVersion(int *major, int *minor,
+ }
+ 
+ #if !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO &&               \
+-    !SANITIZER_NETBSD && !SANITIZER_OPENBSD && !SANITIZER_SOLARIS
++    !SANITIZER_NETBSD && !SANITIZER_OPENBSD && !SANITIZER_SOLARIS && !SANITIZER_NONGNU
+ static uptr g_tls_size;
+ 
+ #ifdef __i386__
+@@ -261,7 +261,7 @@ void InitTlsSize() { }
+ #if (defined(__x86_64__) || defined(__i386__) || defined(__mips__) ||          \
+      defined(__aarch64__) || defined(__powerpc64__) || defined(__s390__) ||    \
+      defined(__arm__)) &&                                                      \
+-    SANITIZER_LINUX && !SANITIZER_ANDROID
++    SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+ // sizeof(struct pthread) from glibc.
+ static atomic_uintptr_t thread_descriptor_size;
+ 
+@@ -426,7 +426,7 @@ int GetSizeFromHdr(struct dl_phdr_info *info, size_t size, void *data) {
+ 
+ #if !SANITIZER_GO
+ static void GetTls(uptr *addr, uptr *size) {
+-#if SANITIZER_LINUX && !SANITIZER_ANDROID
++#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+ # if defined(__x86_64__) || defined(__i386__) || defined(__s390__)
+   *addr = ThreadSelf();
+   *size = GetTlsSize();
+@@ -470,7 +470,7 @@ static void GetTls(uptr *addr, uptr *size) {
+ #elif SANITIZER_OPENBSD
+   *addr = 0;
+   *size = 0;
+-#elif SANITIZER_ANDROID
++#elif SANITIZER_ANDROID || SANITIZER_NONGNU
+   *addr = 0;
+   *size = 0;
+ #elif SANITIZER_SOLARIS
+@@ -486,7 +486,7 @@ static void GetTls(uptr *addr, uptr *size) {
+ #if !SANITIZER_GO
+ uptr GetTlsSize() {
+ #if SANITIZER_FREEBSD || SANITIZER_ANDROID || SANITIZER_NETBSD ||              \
+-    SANITIZER_OPENBSD || SANITIZER_SOLARIS
++    SANITIZER_OPENBSD || SANITIZER_SOLARIS || SANITIZER_NONGNU
+   uptr addr, size;
+   GetTls(&addr, &size);
+   return size;
+diff --git a/lib/sanitizer_common/sanitizer_platform.h b/lib/sanitizer_common/sanitizer_platform.h
+index d81e25580..e10680ac8 100644
+--- a/lib/sanitizer_common/sanitizer_platform.h
++++ b/lib/sanitizer_common/sanitizer_platform.h
+@@ -208,6 +208,12 @@
+ # define SANITIZER_SOLARIS32 0
+ #endif
+ 
++#if defined(__linux__) && !defined(__GLIBC__)
++# define SANITIZER_NONGNU 1
++#else
++# define SANITIZER_NONGNU 0
++#endif
++
+ #if defined(__myriad2__)
+ # define SANITIZER_MYRIAD2 1
+ #else
+diff --git a/lib/sanitizer_common/sanitizer_platform_interceptors.h b/lib/sanitizer_common/sanitizer_platform_interceptors.h
+index f95539a73..6c53b3415 100644
+--- a/lib/sanitizer_common/sanitizer_platform_interceptors.h
++++ b/lib/sanitizer_common/sanitizer_platform_interceptors.h
+@@ -39,7 +39,7 @@
+ # include "sanitizer_platform_limits_solaris.h"
+ #endif
+ 
+-#if SANITIZER_LINUX && !SANITIZER_ANDROID
++#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+ # define SI_LINUX_NOT_ANDROID 1
+ #else
+ # define SI_LINUX_NOT_ANDROID 0
+@@ -322,7 +322,7 @@
+ #define SANITIZER_INTERCEPT_ETHER_R (SI_FREEBSD || SI_LINUX_NOT_ANDROID)
+ #define SANITIZER_INTERCEPT_SHMCTL          \
+   (SI_NETBSD || SI_OPENBSD || SI_SOLARIS || \
+-  ((SI_FREEBSD || SI_LINUX_NOT_ANDROID) && \
++  ((SI_FREEBSD || SI_LINUX_NOT_ANDROID || SANITIZER_NONGNU) && \
+     SANITIZER_WORDSIZE == 64))  // NOLINT
+ #define SANITIZER_INTERCEPT_RANDOM_R SI_LINUX_NOT_ANDROID
+ #define SANITIZER_INTERCEPT_PTHREAD_ATTR_GET SI_POSIX
+diff --git a/lib/sanitizer_common/sanitizer_platform_limits_posix.cc b/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
+index 54da635d7..2f6ff69c3 100644
+--- a/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
++++ b/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
+@@ -14,6 +14,9 @@
+ 
+ #include "sanitizer_platform.h"
+ 
++// Workaround musl <--> linux conflicting definition of 'struct sysinfo'
++#define _LINUX_SYSINFO_H
++
+ #if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_MAC
+ // Tests in this file assume that off_t-dependent data structures match the
+ // libc ABI. For example, struct dirent here is what readdir() function (as
+@@ -138,12 +141,14 @@ typedef struct user_fpregs elf_fpregset_t;
+ 
+ #if SANITIZER_LINUX && !SANITIZER_ANDROID
+ #include <glob.h>
+-#include <obstack.h>
++#  if !SANITIZER_NONGNU
++#    include <obstack.h>
++#  endif
+ #include <mqueue.h>
+-#include <net/if_ppp.h>
+-#include <netax25/ax25.h>
+-#include <netipx/ipx.h>
+-#include <netrom/netrom.h>
++#include <linux/if_ppp.h>
++#include <linux/ax25.h>
++#include <linux/ipx.h>
++#include <linux/netrom.h>
+ #if HAVE_RPC_XDR_H
+ # include <rpc/xdr.h>
+ #elif HAVE_TIRPC_RPC_XDR_H
+@@ -251,7 +256,7 @@ namespace __sanitizer {
+   unsigned struct_itimerspec_sz = sizeof(struct itimerspec);
+ #endif // SANITIZER_LINUX || SANITIZER_FREEBSD
+ 
+-#if SANITIZER_LINUX && !SANITIZER_ANDROID
++#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+   // Use pre-computed size of struct ustat to avoid <sys/ustat.h> which
+   // has been removed from glibc 2.28.
+ #if defined(__aarch64__) || defined(__s390x__) || defined (__mips64) \
+@@ -322,7 +327,7 @@ unsigned struct_ElfW_Phdr_sz = sizeof(ElfW(Phdr));
+ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr);
+ #endif
+ 
+-#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID
++#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+   int glob_nomatch = GLOB_NOMATCH;
+   int glob_altdirfunc = GLOB_ALTDIRFUNC;
+ #endif
+@@ -416,7 +421,7 @@ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr);
+   unsigned struct_termios_sz = sizeof(struct termios);
+   unsigned struct_winsize_sz = sizeof(struct winsize);
+ 
+-#if SANITIZER_LINUX
++#if SANITIZER_LINUX && !SANITIZER_NONGNU
+   unsigned struct_arpreq_sz = sizeof(struct arpreq);
+   unsigned struct_cdrom_msf_sz = sizeof(struct cdrom_msf);
+   unsigned struct_cdrom_multisession_sz = sizeof(struct cdrom_multisession);
+@@ -466,7 +471,7 @@ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr);
+   unsigned struct_vt_mode_sz = sizeof(struct vt_mode);
+ #endif // SANITIZER_LINUX || SANITIZER_FREEBSD
+ 
+-#if SANITIZER_LINUX && !SANITIZER_ANDROID
++#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+   unsigned struct_ax25_parms_struct_sz = sizeof(struct ax25_parms_struct);
+   unsigned struct_cyclades_monitor_sz = sizeof(struct cyclades_monitor);
+ #if EV_VERSION > (0x010000)
+@@ -834,7 +839,7 @@ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr);
+   unsigned IOCTL_VT_WAITACTIVE = VT_WAITACTIVE;
+ #endif // SANITIZER_LINUX || SANITIZER_FREEBSD
+ 
+-#if SANITIZER_LINUX && !SANITIZER_ANDROID
++#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+   unsigned IOCTL_CYGETDEFTHRESH = CYGETDEFTHRESH;
+   unsigned IOCTL_CYGETDEFTIMEOUT = CYGETDEFTIMEOUT;
+   unsigned IOCTL_CYGETMON = CYGETMON;
+@@ -989,7 +994,7 @@ CHECK_SIZE_AND_OFFSET(dl_phdr_info, dlpi_phdr);
+ CHECK_SIZE_AND_OFFSET(dl_phdr_info, dlpi_phnum);
+ #endif // SANITIZER_LINUX || SANITIZER_FREEBSD
+ 
+-#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID
++#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+ CHECK_TYPE_SIZE(glob_t);
+ CHECK_SIZE_AND_OFFSET(glob_t, gl_pathc);
+ CHECK_SIZE_AND_OFFSET(glob_t, gl_pathv);
+@@ -1023,6 +1028,7 @@ CHECK_TYPE_SIZE(iovec);
+ CHECK_SIZE_AND_OFFSET(iovec, iov_base);
+ CHECK_SIZE_AND_OFFSET(iovec, iov_len);
+ 
++#if !SANITIZER_NONGNU
+ CHECK_TYPE_SIZE(msghdr);
+ CHECK_SIZE_AND_OFFSET(msghdr, msg_name);
+ CHECK_SIZE_AND_OFFSET(msghdr, msg_namelen);
+@@ -1036,6 +1042,7 @@ CHECK_TYPE_SIZE(cmsghdr);
+ CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_len);
+ CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_level);
+ CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_type);
++#endif
+ 
+ #ifndef __GLIBC_PREREQ
+ #define __GLIBC_PREREQ(x, y) 0
+@@ -1145,7 +1152,7 @@ CHECK_SIZE_AND_OFFSET(mntent, mnt_passno);
+ 
+ CHECK_TYPE_SIZE(ether_addr);
+ 
+-#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID
++#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+ CHECK_TYPE_SIZE(ipc_perm);
+ # if SANITIZER_FREEBSD
+ CHECK_SIZE_AND_OFFSET(ipc_perm, key);
+@@ -1206,7 +1213,7 @@ CHECK_SIZE_AND_OFFSET(ifaddrs, ifa_dstaddr);
+ CHECK_SIZE_AND_OFFSET(ifaddrs, ifa_data);
+ #endif
+ 
+-#if SANITIZER_LINUX
++#if SANITIZER_LINUX && !SANITIZER_NONGNU
+ COMPILER_CHECK(sizeof(__sanitizer_mallinfo) == sizeof(struct mallinfo));
+ #endif
+ 
+@@ -1256,7 +1263,7 @@ COMPILER_CHECK(__sanitizer_XDR_DECODE == XDR_DECODE);
+ COMPILER_CHECK(__sanitizer_XDR_FREE == XDR_FREE);
+ #endif
+ 
+-#if SANITIZER_LINUX && !SANITIZER_ANDROID
++#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+ COMPILER_CHECK(sizeof(__sanitizer_FILE) <= sizeof(FILE));
+ CHECK_SIZE_AND_OFFSET(FILE, _flags);
+ CHECK_SIZE_AND_OFFSET(FILE, _IO_read_ptr);
+@@ -1275,7 +1282,7 @@ CHECK_SIZE_AND_OFFSET(FILE, _chain);
+ CHECK_SIZE_AND_OFFSET(FILE, _fileno);
+ #endif
+ 
+-#if SANITIZER_LINUX && !SANITIZER_ANDROID
++#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+ COMPILER_CHECK(sizeof(__sanitizer__obstack_chunk) <= sizeof(_obstack_chunk));
+ CHECK_SIZE_AND_OFFSET(_obstack_chunk, limit);
+ CHECK_SIZE_AND_OFFSET(_obstack_chunk, prev);
+diff --git a/lib/tsan/rtl/tsan_platform_linux.cc b/lib/tsan/rtl/tsan_platform_linux.cc
+index de989b780..51a97b554 100644
+--- a/lib/tsan/rtl/tsan_platform_linux.cc
++++ b/lib/tsan/rtl/tsan_platform_linux.cc
+@@ -294,7 +294,7 @@ void InitializePlatform() {
+ // This is required to properly "close" the fds, because we do not see internal
+ // closes within glibc. The code is a pure hack.
+ int ExtractResolvFDs(void *state, int *fds, int nfd) {
+-#if SANITIZER_LINUX && !SANITIZER_ANDROID
++#if SANITIZER_LINUX && !SANITIZER_ANDROID && !SANITIZER_NONGNU
+   int cnt = 0;
+   struct __res_state *statp = (struct __res_state*)state;
+   for (int i = 0; i < MAXNS && cnt < nfd; i++) {
+-- 
+2.19.0
+
diff --git a/pkgs/development/compilers/nim/default.nix b/pkgs/development/compilers/nim/default.nix
index 4228c368e566..129b8ca4dd8a 100644
--- a/pkgs/development/compilers/nim/default.nix
+++ b/pkgs/development/compilers/nim/default.nix
@@ -1,15 +1,15 @@
 # based on https://github.com/nim-lang/Nim/blob/v0.18.0/.travis.yml
 
-{ stdenv, lib, fetchurl, makeWrapper, nodejs-slim-11_x, openssl, pcre, readline,
+{ stdenv, lib, fetchurl, makeWrapper, nodejs-slim, openssl, pcre, readline,
   boehmgc, sfml, tzdata, coreutils, sqlite }:
 
 stdenv.mkDerivation rec {
   pname = "nim";
-  version = "0.20.2";
+  version = "1.0.0";
 
   src = fetchurl {
     url = "https://nim-lang.org/download/${pname}-${version}.tar.xz";
-    sha256 = "0pibil10x0c181kw705phlwk8bn8dy5ghqd9h9fm6i9afrz5ryp1";
+    sha256 = "1pg0lxahis8zfk6rdzdj281bahl8wglpjgngkc4vg1pc9p61fj03";
   };
 
   doCheck = !stdenv.isDarwin;
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   #    as part of building it, so it cannot be read-only
 
   checkInputs = [
-    nodejs-slim-11_x tzdata coreutils
+    nodejs-slim tzdata coreutils
   ];
 
   nativeBuildInputs = [
@@ -64,9 +64,6 @@ stdenv.mkDerivation rec {
       substituteInPlace ./tests/osproc/tworkingdir.nim --replace "/usr/bin" "${coreutils}/bin"
       substituteInPlace ./tests/stdlib/ttimes.nim --replace "/usr/share/zoneinfo" "${tzdata}/share/zoneinfo"
 
-      # reported upstream: https://github.com/nim-lang/Nim/issues/11435
-      ${disableTest} ./tests/misc/tstrace.nim
-
       # runs out of memory on a machine with 8GB RAM
       ${disableTest} ./tests/system/t7894.nim
 
@@ -80,11 +77,20 @@ stdenv.mkDerivation rec {
       ${disableCompile} ./lib/nimhcr.nim
       ${disableTest} ./tests/dll/nimhcr_unit.nim
       ${disableTest} ./tests/dll/nimhcr_integration.nim
+
+      # reported upstream: https://github.com/nim-lang/Nim/issues/12262
+      ${disableTest} ./tests/range/tcompiletime_range_checks.nim
+
+      # requires "immintrin.h" which is available only on x86
+      ${disableTest} ./tests/misc/tsizeof3.nim
     '';
 
   checkPhase = ''
     runHook preCheck
 
+    # Fortify hardening breaks tests
+    # https://github.com/nim-lang/Nim/issues/11435#issuecomment-534545696
+    NIX_HARDENING_ENABLE=''${NIX_HARDENING_ENABLE/fortify/} \
     ./koch tests --nim:bin/nim all
 
     runHook postCheck
@@ -97,7 +103,10 @@ stdenv.mkDerivation rec {
     ./koch install $out
     mv $out/nim/bin/* $out/bin/ && rmdir $out/nim/bin
     mv $out/nim/*     $out/     && rmdir $out/nim
+
+    # Fortify hardening appends -O2 to gcc flags which is unwanted for unoptimized nim builds.
     wrapProgram $out/bin/nim \
+      --run 'NIX_HARDENING_ENABLE=''${NIX_HARDENING_ENABLE/fortify/}' \
       --suffix PATH : ${lib.makeBinPath [ stdenv.cc ]}
 
     runHook postInstall
@@ -107,7 +116,7 @@ stdenv.mkDerivation rec {
     description = "Statically typed, imperative programming language";
     homepage = "https://nim-lang.org/";
     license = licenses.mit;
-    maintainers = with maintainers; [ ehmry peterhoeg ];
+    maintainers = with maintainers; [ ehmry ];
     platforms = with platforms; linux ++ darwin; # arbitrary
   };
 }
diff --git a/pkgs/development/compilers/openjdk/openjfx/11.nix b/pkgs/development/compilers/openjdk/openjfx/11.nix
index 9e6d30efda81..43fe8ed83876 100644
--- a/pkgs/development/compilers/openjdk/openjfx/11.nix
+++ b/pkgs/development/compilers/openjdk/openjfx/11.nix
@@ -83,6 +83,9 @@ in makePackage {
     cp -r build/modular-sdk $out
   '';
 
+  # glib-2.62 deprecations
+  NIX_CFLAGS_COMPILE = [ "-DGLIB_DISABLE_DEPRECATION_WARNINGS" ];
+
   stripDebugList = [ "." ];
 
   postFixup = ''
diff --git a/pkgs/development/compilers/openjdk/openjfx/12.nix b/pkgs/development/compilers/openjdk/openjfx/12.nix
index 418c58ac683e..356ac4800d9f 100644
--- a/pkgs/development/compilers/openjdk/openjfx/12.nix
+++ b/pkgs/development/compilers/openjdk/openjfx/12.nix
@@ -83,6 +83,9 @@ in makePackage {
     cp -r build/modular-sdk $out
   '';
 
+  # glib-2.62 deprecations
+  NIX_CFLAGS_COMPILE = [ "-DGLIB_DISABLE_DEPRECATION_WARNINGS" ];
+
   stripDebugList = [ "." ];
 
   postFixup = ''
diff --git a/pkgs/development/compilers/rust/bootstrap.nix b/pkgs/development/compilers/rust/bootstrap.nix
index 43a72985ddec..7b774d066b7f 100644
--- a/pkgs/development/compilers/rust/bootstrap.nix
+++ b/pkgs/development/compilers/rust/bootstrap.nix
@@ -3,16 +3,16 @@
 let
   # Note: the version MUST be one version prior to the version we're
   # building
-  version = "1.36.0";
+  version = "1.37.0";
 
-  # fetch hashes by running `print-hashes.sh 1.36.0`
+  # fetch hashes by running `print-hashes.sh 1.37.0`
   hashes = {
-    i686-unknown-linux-gnu = "9f95c3e96622a792858c8a1c9274fa63e6992370493b27c1ac7299a3bec5156d";
-    x86_64-unknown-linux-gnu = "15e592ec52f14a0586dcebc87a957e472c4544e07359314f6354e2b8bd284c55";
-    armv7-unknown-linux-gnueabihf = "798181a728017068f9eddfa665771805d97846cd87bddcd67e0fe27c8d082ceb";
-    aarch64-unknown-linux-gnu = "db78c24d93756f9fe232f081dbc4a46d38f8eec98353a9e78b9b164f9628042d";
-    i686-apple-darwin = "3dbc34fdea8bc030badf9c8b2572c09fd3f5369b59ac099fc521064b390b9e60";
-    x86_64-apple-darwin = "91f151ec7e24f5b0645948d439fc25172ec4012f0584dd16c3fb1acb709aa325";
+    i686-unknown-linux-gnu = "74510e0e52a55e65a9f716673c2cda4d2bd427e2453541c6993c77c3ec04acf9";
+    x86_64-unknown-linux-gnu = "cb573229bfd32928177c3835fdeb62d52da64806b844bc1095c6225b0665a1cb";
+    armv7-unknown-linux-gnueabihf = "5b87b877f0ed20c6a09ce26e7a15d8c61b26b62484b97e78a51099d0efefec98";
+    aarch64-unknown-linux-gnu = "263ef98fa3a6b2911b56f89c06615cdebf6ef676eb9b2493ad1539602f79b6ba";
+    i686-apple-darwin = "e45d0c4d882fc6c404ffa6fe790294f4ea96384a2b48804adbf723f3635477a8";
+    x86_64-apple-darwin = "b2310c97ffb964f253c4088c8d29865f876a49da2a45305493af5b5c7a3ca73d";
   };
 
   platform =
diff --git a/pkgs/development/compilers/rust/patches/net-tcp-disable-tests.patch b/pkgs/development/compilers/rust/patches/net-tcp-disable-tests.patch
deleted file mode 100644
index 583a6027f83a..000000000000
--- a/pkgs/development/compilers/rust/patches/net-tcp-disable-tests.patch
+++ /dev/null
@@ -1,92 +0,0 @@
-diff -ru rustc-1.36.0-src-orig/src/libstd/net/tcp.rs rustc-1.36.0-src/src/libstd/net/tcp.rs
---- rustc-1.36.0-src-orig/src/libstd/net/tcp.rs	2019-07-03 10:00:00.000000000 +0200
-+++ rustc-1.36.0-src/src/libstd/net/tcp.rs	2019-07-07 11:33:35.378130207 +0200
-@@ -973,6 +973,7 @@
-         }
-     }
- 
-+    #[cfg_attr(target_os = "macos", ignore)]
-     #[test]
-     fn listen_localhost() {
-         let socket_addr = next_test_ip4();
-@@ -1031,6 +1032,7 @@
-         })
-     }
- 
-+    #[cfg_attr(target_os = "macos", ignore)]
-     #[test]
-     fn read_eof() {
-         each_ip(&mut |addr| {
-@@ -1050,6 +1052,7 @@
-         })
-     }
- 
-+    #[cfg_attr(target_os = "macos", ignore)]
-     #[test]
-     fn write_close() {
-         each_ip(&mut |addr| {
-@@ -1076,6 +1079,7 @@
-         })
-     }
- 
-+    #[cfg_attr(target_os = "macos", ignore)]
-     #[test]
-     fn multiple_connect_serial() {
-         each_ip(&mut |addr| {
-@@ -1098,6 +1102,7 @@
-         })
-     }
- 
-+    #[cfg_attr(target_os = "macos", ignore)]
-     #[test]
-     fn multiple_connect_interleaved_greedy_schedule() {
-         const MAX: usize = 10;
-@@ -1134,6 +1139,7 @@
-     }
- 
-     #[test]
-+    #[cfg_attr(target_os = "macos", ignore)]
-     fn multiple_connect_interleaved_lazy_schedule() {
-         const MAX: usize = 10;
-         each_ip(&mut |addr| {
-@@ -1467,6 +1473,7 @@
-     }
- 
-     #[test]
-+    #[cfg_attr(target_os = "macos", ignore)]
-     fn clone_while_reading() {
-         each_ip(&mut |addr| {
-             let accept = t!(TcpListener::bind(&addr));
-@@ -1597,7 +1604,7 @@
- 
-     // FIXME: re-enabled openbsd tests once their socket timeout code
-     //        no longer has rounding errors.
--    #[cfg_attr(any(target_os = "netbsd", target_os = "openbsd"), ignore)]
-+    #[cfg_attr(any(target_os = "netbsd", target_os = "openbsd", target_os = "macos"), ignore)]
-     #[cfg_attr(target_env = "sgx", ignore)] // FIXME: https://github.com/fortanix/rust-sgx/issues/31
-     #[test]
-     fn timeouts() {
-@@ -1643,6 +1650,7 @@
-         drop(listener);
-     }
- 
-+    #[cfg_attr(target_os = "macos", ignore)]
-     #[test]
-     #[cfg_attr(target_env = "sgx", ignore)] // FIXME: https://github.com/fortanix/rust-sgx/issues/31
-     fn test_read_with_timeout() {
-@@ -1687,6 +1695,7 @@
-         drop(listener);
-     }
- 
-+    #[cfg_attr(target_os = "macos", ignore)]
-     #[test]
-     #[cfg_attr(target_env = "sgx", ignore)]
-     fn nodelay() {
-@@ -1719,6 +1728,7 @@
-         assert_eq!(ttl, t!(stream.ttl()));
-     }
- 
-+    #[cfg_attr(target_os = "macos", ignore)]
-     #[test]
-     #[cfg_attr(target_env = "sgx", ignore)]
-     fn set_nonblocking() {
diff --git a/pkgs/development/compilers/rust/patches/stdsimd-disable-doctest.patch b/pkgs/development/compilers/rust/patches/stdsimd-disable-doctest.patch
deleted file mode 100644
index 6ef7fd0f7ce4..000000000000
--- a/pkgs/development/compilers/rust/patches/stdsimd-disable-doctest.patch
+++ /dev/null
@@ -1,20 +0,0 @@
-diff --git a/src/stdsimd/coresimd/x86/mod.rs b/src/stdsimd/coresimd/x86/mod.rs
-index 32915c332..7cb54f31e 100644
---- a/src/stdsimd/coresimd/x86/mod.rs
-+++ b/src/stdsimd/coresimd/x86/mod.rs
-@@ -279,7 +279,6 @@ types! {
-     ///
-     /// # Examples
-     ///
--    /// ```
-     /// # #![feature(cfg_target_feature, target_feature, stdsimd)]
-     /// # #![cfg_attr(not(dox), no_std)]
-     /// # #[cfg(not(dox))]
-@@ -301,7 +300,6 @@ types! {
-     /// # }
-     /// # if is_x86_feature_detected!("sse") { unsafe { foo() } }
-     /// # }
--    /// ```
-     pub struct __m256(f32, f32, f32, f32, f32, f32, f32, f32);
- 
-     /// 256-bit wide set of four `f64` types, x86-specific
diff --git a/pkgs/development/compilers/rust/rustc.nix b/pkgs/development/compilers/rust/rustc.nix
index daf7af1babdc..27336aa501b5 100644
--- a/pkgs/development/compilers/rust/rustc.nix
+++ b/pkgs/development/compilers/rust/rustc.nix
@@ -1,7 +1,8 @@
 { stdenv, removeReferencesTo, pkgsBuildBuild, pkgsBuildHost, pkgsBuildTarget
-, fetchurl, file, python2, tzdata, ps
-, llvmPackages_7, darwin, git, cmake, rustPlatform
-, which, libffi, gdb
+, fetchurl, file, python2
+, llvm_7, darwin, git, cmake, rustPlatform
+, pkgconfig, openssl
+, which, libffi
 , withBundledLLVM ? false
 }:
 
@@ -9,31 +10,21 @@ let
   inherit (stdenv.lib) optional optionalString;
   inherit (darwin.apple_sdk.frameworks) Security;
 
-  llvmPackages = llvmPackages_7;
-
-  llvmSharedForBuild = pkgsBuildBuild.llvmPackages.llvm.override { enableSharedLibraries = true; };
-  llvmSharedForHost = pkgsBuildHost.llvmPackages.llvm.override { enableSharedLibraries = true; };
-  llvmSharedForTarget = pkgsBuildTarget.llvmPackages.llvm.override { enableSharedLibraries = true; };
+  llvmSharedForBuild = pkgsBuildBuild.llvm_7.override { enableSharedLibraries = true; };
+  llvmSharedForHost = pkgsBuildHost.llvm_7.override { enableSharedLibraries = true; };
+  llvmSharedForTarget = pkgsBuildTarget.llvm_7.override { enableSharedLibraries = true; };
 
   # For use at runtime
-  llvmShared = llvmPackages.llvm.override { enableSharedLibraries = true; };
-in
-
-stdenv.mkDerivation rec {
+  llvmShared = llvm_7.override { enableSharedLibraries = true; };
+in stdenv.mkDerivation rec {
   pname = "rustc";
-  version = "1.37.0";
+  version = "1.38.0";
 
   src = fetchurl {
     url = "https://static.rust-lang.org/dist/rustc-${version}-src.tar.gz";
-    sha256 = "1hrqprybhkhs6d9b5pjskfnc5z9v2l2gync7nb39qjb5s0h703hj";
+    sha256 = "101dlpsfkq67p0hbwx4acqq6n90dj4bbprndizpgh1kigk566hk4";
   };
 
-  # Provide the compiler-rt sources needed for profiling.
-  preConfigure = ''
-    mkdir src/llvm-project/compiler-rt
-    tar xf ${llvmPackages.compiler-rt.src} -C src/llvm-project/compiler-rt --strip-components=1
-  '';
-
   __darwinAllowLocalNetworking = true;
 
   # rustc complains about modified source files otherwise
@@ -107,18 +98,6 @@ stdenv.mkDerivation rec {
       --replace 'BOOTSTRAP_ARGS :=' 'BOOTSTRAP_ARGS := --jobs $(NIX_BUILD_CORES)'
   '';
 
-  patches = [
-    ./patches/net-tcp-disable-tests.patch
-
-    # Re-evaluate if this we need to disable this one
-    #./patches/stdsimd-disable-doctest.patch
-
-    # Fails on hydra - not locally; the exact reason is unknown.
-    # Comments in the test suggest that some non-reproducible environment
-    # variables such $RANDOM can make it fail.
-    # ./patches/disable-test-inherit-env.patch
-  ];
-
   # the rust build system complains that nix alters the checksums
   dontFixLibtool = true;
 
@@ -131,74 +110,26 @@ stdenv.mkDerivation rec {
     sed -i configure \
       -e '/probe_need CFG_CURL curl/d'
 
-    # On Hydra: `TcpListener::bind(&addr)`: Address already in use (os error 98)'
-    sed '/^ *fn fast_rebind()/i#[ignore]' -i src/libstd/net/tcp.rs
-
-    # https://github.com/rust-lang/rust/issues/39522
-    echo removing gdb-version-sensitive tests...
-    find src/test/debuginfo -type f -execdir grep -q ignore-gdb-version '{}' \; -print -delete
-    rm src/test/debuginfo/{borrowed-c-style-enum.rs,c-style-enum-in-composite.rs,gdb-pretty-struct-and-enums.rs,generic-enum-with-different-disr-sizes.rs}
-
     # Useful debugging parameter
     # export VERBOSE=1
-  '' + optionalString stdenv.isDarwin ''
-    # Disable all lldb tests.
-    # error: Can't run LLDB test because LLDB's python path is not set
-    rm -vr src/test/debuginfo/*
-    rm -v src/test/run-pass/backtrace-debuginfo.rs || true
-
-    # error: No such file or directory
-    rm -v src/test/ui/run-pass/issues/issue-45731.rs || true
-
-    # Disable tests that fail when sandboxing is enabled.
-    substituteInPlace src/libstd/sys/unix/ext/net.rs \
-        --replace '#[test]' '#[test] #[ignore]'
-    substituteInPlace src/test/run-pass/env-home-dir.rs \
-        --replace 'home_dir().is_some()' true
-    rm -v src/test/run-pass/fds-are-cloexec.rs || true  # FIXME: pipes?
-    rm -v src/test/ui/run-pass/threads-sendsync/sync-send-in-std.rs || true  # FIXME: ???
   '';
 
   # rustc unfortunately needs cmake to compile llvm-rt but doesn't
   # use it for the normal build. This disables cmake in Nix.
   dontUseCmakeConfigure = true;
 
-  # ps is needed for one of the test cases
   nativeBuildInputs = [
-    file python2 ps rustPlatform.rust.rustc git cmake
-    which libffi removeReferencesTo
-  ] # Only needed for the debuginfo tests
-    ++ optional (!stdenv.isDarwin) gdb;
+    file python2 rustPlatform.rust.rustc git cmake
+    which libffi removeReferencesTo pkgconfig
+  ];
 
-  buildInputs = optional stdenv.isDarwin Security
+  buildInputs = [ openssl ]
+    ++ optional stdenv.isDarwin Security
     ++ optional (!withBundledLLVM) llvmShared;
 
   outputs = [ "out" "man" "doc" ];
   setOutputFlags = false;
 
-  # Disable codegen units and hardening for the tests.
-  preCheck = ''
-    export RUSTFLAGS=
-    export TZDIR=${tzdata}/share/zoneinfo
-    export hardeningDisable=all
-  '' +
-  # Ensure TMPDIR is set, and disable a test that removing the HOME
-  # variable from the environment falls back to another home
-  # directory.
-  optionalString stdenv.isDarwin ''
-    export TMPDIR=/tmp
-    sed -i '28s/home_dir().is_some()/true/' ./src/test/run-pass/env-home-dir.rs
-  '';
-
-  # 1. Upstream is not running tests on aarch64:
-  # see https://github.com/rust-lang/rust/issues/49807#issuecomment-380860567
-  # So we do the same.
-  # 2. Tests run out of memory for i686
-  #doCheck = !stdenv.isAarch64 && !stdenv.isi686;
-
-  # Disabled for now; see https://github.com/NixOS/nixpkgs/pull/42348#issuecomment-402115598.
-  doCheck = false;
-
   # remove references to llvm-config in lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
   # and thus a transitive dependency on ncurses
   postInstall = ''
diff --git a/pkgs/development/compilers/vala/default.nix b/pkgs/development/compilers/vala/default.nix
index 15ed7f8bd29d..9714a8ebd505 100644
--- a/pkgs/development/compilers/vala/default.nix
+++ b/pkgs/development/compilers/vala/default.nix
@@ -22,27 +22,20 @@ let
         };
 
       in {
-        "0.38" = fp {
-          commit = "2c290f7253bba5ceb0d32e7d0b0ec0d0e81cc263";
-          sha256 = "056ybapfx18d7xw1k8k85nsjrc26qk2q2d9v9nz2zrcwbq5brhkp";
-        };
 
         # NOTE: the openembedded-core project doesn't have a patch for 0.40.12
         # We've fixed the single merge conflict in the following patch.
         #     0.40.12: https://github.com/openembedded/openembedded-core/raw/8553c52f174af4c8c433c543f806f5ed5c1ec48c/meta/recipes-devtools/vala/vala/disable-graphviz.patch
         "0.40" = ./disable-graphviz-0.40.12.patch;
 
-        "0.42" = fp {
-          commit = "f2b4f9ec6f44dced7f88df849cca68961419eeb8";
-          sha256 = "112qhdzix0d7lfpfcam1cxprzmfzpwypb1226m5ma1vq9qy0sn7g";
-        };
-
         # NOTE: the openembedded-core project doesn't have a patch for 0.44.1
         # We've reverted the addition of the "--disable-valadoc" option
         # and then applied the following patch.
         #     0.42.4: https://github.com/openembedded/openembedded-core/raw/f2b4f9ec6f44dced7f88df849cca68961419eeb8/meta/recipes-devtools/vala/vala/disable-graphviz.patch
         "0.44" = ./disable-graphviz-0.44.3.patch;
 
+        "0.46" = ./disable-graphviz-0.46.1.patch;
+
       }.${lib.versions.majorMinor version} or (throw "no graphviz patch for this version of vala");
 
     disableGraphviz = lib.versionAtLeast version "0.38" && !withGraphviz;
@@ -108,14 +101,8 @@ let
 
 in rec {
   vala_0_36 = generic {
-    version = "0.36.19";
-    sha256 = "05si2f4zjvq0q3wqfh1wxdq20jy1xqxq2skqh8vfh2jyp355lwar";
-  };
-
-  vala_0_38 = generic {
-    version = "0.38.10";
-    sha256  = "1rdwwqs973qv225v8b5izcgwvqn56jxgr4pa3wxxbliar3aww5sw";
-    extraNativeBuildInputs = [ autoconf ] ++ lib.optional stdenv.isDarwin libtool;
+    version = "0.36.20";
+    sha256 = "19v7zjhr9yxkh9lxg46n9gjr0lb7j6v0xqfhrdvgz18xhj3hm5my";
   };
 
   vala_0_40 = generic {
@@ -123,15 +110,15 @@ in rec {
     sha256 = "0vv25fmr9jqiqf080vak1x4raa4w3cz3n5ysjglqsq9qfx304i7b";
   };
 
-  vala_0_42 = generic {
-    version = "0.42.7";
-    sha256 = "029ksbsdpl581wzy570kj4kkw8b4bizgh494c051zsvkwck55p83";
+  vala_0_44 = generic {
+    version = "0.44.7";
+    sha256 = "0z5xy4qc95rm2gj7s2k14xm1xp3mrf0yz64fx4kddqjxkpsz87xz";
   };
 
-  vala_0_44 = generic {
-    version = "0.44.6";
-    sha256 = "0fkrrpnisgq3y816piyr7hm2b94jaj7ki9y974galq3lmxb1g7xb";
+  vala_0_46 = generic {
+    version = "0.46.1";
+    sha256 = "10czkhclnisdz6k5qfiicmvx47m9177l5dkhjn29g43khnmpkr8l";
   };
 
-  vala = vala_0_44;
+  vala = vala_0_46;
 }
diff --git a/pkgs/development/compilers/vala/disable-graphviz-0.46.1.patch b/pkgs/development/compilers/vala/disable-graphviz-0.46.1.patch
new file mode 100644
index 000000000000..8c3e54b6a959
--- /dev/null
+++ b/pkgs/development/compilers/vala/disable-graphviz-0.46.1.patch
@@ -0,0 +1,261 @@
+diff --git a/Makefile.am b/Makefile.am
+index f70234759..b3d6c3833 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -13,19 +13,9 @@ SUBDIRS = \
+ 	doc \
+ 	gobject-introspection \
+ 	vapigen \
+-	$(NULL)
+-
+-if ENABLE_VALADOC
+-SUBDIRS += \
+ 	libvaladoc \
+ 	valadoc \
+ 	$(NULL)
+-endif
+-
+-DISTCHECK_CONFIGURE_FLAGS = \
+-	--enable-valadoc \
+-	--enable-unversioned \
+-	$(NULL)
+ 
+ if ENABLE_UNVERSIONED
+ aclocaldir = $(datadir)/aclocal
+diff --git a/configure.ac b/configure.ac
+index 6de326bbb..91f159b16 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -160,10 +160,11 @@ AC_SUBST(GMODULE_CFLAGS)
+ AC_SUBST(GMODULE_LIBS)
+ 
+ AC_ARG_WITH(cgraph, AS_HELP_STRING([--with-cgraph], [Required flag for cross-compilation to define capability of graphviz]), [], with_cgraph=check)
+-AC_ARG_ENABLE(valadoc, AS_HELP_STRING([--disable-valadoc], [Disable valadoc]), enable_valadoc=$enableval, enable_valadoc=yes)
+-if test x$enable_valadoc = xyes; then
++AC_ARG_ENABLE(graphviz, AS_HELP_STRING([--disable-graphviz], [Disable graphviz usage for valadoc]), enable_graphviz=$enableval, enable_graphviz=yes)
++if test x$enable_graphviz = xyes; then
+ 	PKG_CHECK_MODULES(LIBGVC, libgvc >= $LIBGVC_REQUIRED)
+ 	AC_MSG_CHECKING([for CGRAPH])
++	VALAFLAGS="$VALAFLAGS -D HAVE_GRAPHVIZ"
+ 	cgraph_tmp_LIBADD="$LIBADD"
+ 	cgraph_tmp_CFLAGS="$CFLAGS"
+ 	LIBADD="$LIBADD $LIBGVC_LIBS"
+@@ -201,8 +202,8 @@ if test x$enable_valadoc = xyes; then
+ 	LIBADD="$cgraph_tmp_LIBADD"
+ 	CFLAGS="$cgraph_tmp_CFLAGS"
+ fi
++AM_CONDITIONAL(ENABLE_GRAPHVIZ, test x$enable_graphviz = xyes)
+ AM_CONDITIONAL(HAVE_CGRAPH, test "$have_cgraph" = "yes")
+-AM_CONDITIONAL(ENABLE_VALADOC, test x$enable_valadoc = xyes)
+ 
+ AC_PATH_PROG([XSLTPROC], [xsltproc], :)
+ AM_CONDITIONAL(HAVE_XSLTPROC, test "$XSLTPROC" != :)
+diff --git a/doc/Makefile.am b/doc/Makefile.am
+index d2684a0e0..b343c7c10 100644
+--- a/doc/Makefile.am
++++ b/doc/Makefile.am
+@@ -6,16 +6,11 @@ SUBDIRS = \
+ 
+ dist_man_MANS = \
+ 	valac.1 \
++	valadoc.1 \
+ 	vala-gen-introspect.1 \
+ 	vapigen.1 \
+ 	$(NULL)
+ 
+-if ENABLE_VALADOC
+-dist_man_MANS += \
+-	valadoc.1 \
+-	$(NULL)
+-endif
+-
+ EXTRA_DIST = \
+ 	valac.h2m \
+ 	valadoc.h2m \
+@@ -24,11 +19,7 @@ EXTRA_DIST = \
+ 	$(NULL)
+ 
+ if HAVE_HELP2MAN
+-if ENABLE_VALADOC
+ manpages: valac.1 valadoc.1 vala-gen-introspect.1 vapigen.1
+-else
+-manpages: valac.1 vala-gen-introspect.1 vapigen.1
+-endif
+ 	@rm $^
+ 	$(MAKE) $(AM_MAKEFLAGS) $^
+ 
+@@ -37,13 +28,11 @@ valac.1:
+ 		--include $(srcdir)/valac.h2m \
+ 		--libtool --no-info \
+ 		--output=$@
+-if ENABLE_VALADOC
+ valadoc.1:
+ 	$(HELP2MAN) $(top_builddir)/valadoc/valadoc \
+ 		--include $(srcdir)/valadoc.h2m \
+ 		--libtool --no-info \
+ 		--output=$@
+-endif
+ vala-gen-introspect.1:
+ 	$(HELP2MAN) $(top_builddir)/gobject-introspection/gen-introspect \
+ 		--include $(srcdir)/vala-gen-introspect.h2m \
+@@ -60,15 +49,12 @@ endif
+ if ENABLE_UNVERSIONED
+ install-data-hook:
+ 	cd $(DESTDIR)$(man1dir) && $(LN_S) -f valac@PACKAGE_SUFFIX@.1 valac.1
+-if ENABLE_VALADOC
+ 	cd $(DESTDIR)$(man1dir) && $(LN_S) -f valadoc@PACKAGE_SUFFIX@.1 valadoc.1
+-endif
+ 	cd $(DESTDIR)$(man1dir) && $(LN_S) -f vala-gen-introspect@PACKAGE_SUFFIX@.1 vala-gen-introspect.1
+ 	cd $(DESTDIR)$(man1dir) && $(LN_S) -f vapigen@PACKAGE_SUFFIX@.1 vapigen.1
+ endif
+ 
+ 
+-if ENABLE_VALADOC
+ COMMON_VALADOCFLAGS = \
+ 	--force \
+ 	--verbose \
+@@ -150,7 +136,6 @@ internal-apis/valadoc: $(valadoc_VALASOURCES) internal-apis/codegen
+ 	@touch $@
+ 
+ internal-api-docs: internal-apis/gee internal-apis/vala internal-apis/ccode internal-apis/codegen internal-apis/valadoc
+-endif
+ 
+ clean-local:
+ 	rm -rf $(builddir)/internal-apis
+diff --git a/libvaladoc/Makefile.am b/libvaladoc/Makefile.am
+index 8a3924b54..81fde9ac8 100644
+--- a/libvaladoc/Makefile.am
++++ b/libvaladoc/Makefile.am
+@@ -119,10 +119,6 @@ libvaladoc_la_VALASOURCES = \
+ 	content/tablerow.vala \
+ 	content/taglet.vala \
+ 	content/text.vala \
+-	charts/chart.vala \
+-	charts/chartfactory.vala \
+-	charts/hierarchychart.vala \
+-	charts/simplechartfactory.vala \
+ 	parser/manyrule.vala \
+ 	parser/oneofrule.vala \
+ 	parser/optionalrule.vala \
+@@ -149,13 +145,24 @@ libvaladoc_la_VALASOURCES = \
+ 	highlighter/codetoken.vala \
+ 	highlighter/highlighter.vala \
+ 	html/basicdoclet.vala \
+-	html/htmlchartfactory.vala \
+ 	html/linkhelper.vala \
+ 	html/cssclassresolver.vala \
+ 	html/htmlmarkupwriter.vala \
+ 	html/htmlrenderer.vala \
+ 	$(NULL)
+ 
++if ENABLE_GRAPHVIZ
++libvaladoc_la_VALASOURCES += \
++	charts/chart.vala \
++	charts/chartfactory.vala \
++	charts/hierarchychart.vala \
++	charts/simplechartfactory.vala \
++	html/htmlchartfactory.vala \
++	$(NULL)
++
++LIBGVC_PKG = --vapidir $(top_srcdir)/vapi --pkg libgvc
++endif
++
+ libvaladoc@PACKAGE_SUFFIX@_la_SOURCES = \
+ 	libvaladoc.vala.stamp \
+ 	$(libvaladoc_la_VALASOURCES:.vala=.c) \
+@@ -175,11 +182,11 @@ libvaladoc.vala.stamp: $(libvaladoc_la_VALASOURCES)
+ 		--library valadoc \
+ 		--vapi valadoc@PACKAGE_SUFFIX@.vapi \
+ 		--vapidir $(top_srcdir)/vapi --pkg gmodule-2.0 \
+-		--vapidir $(top_srcdir)/vapi --pkg libgvc \
+ 		--vapidir $(top_srcdir)/gee --pkg gee \
+ 		--vapidir $(top_srcdir)/vala --pkg vala \
+ 		--vapidir $(top_srcdir)/ccode --pkg ccode \
+ 		--vapidir $(top_srcdir)/codegen --pkg codegen \
++		$(LIBGVC_PKG) \
+ 		--pkg config \
+ 		$(filter %.vala %.c,$^)
+ 	touch $@
+@@ -207,6 +214,9 @@ nodist_pkgconfig_DATA = valadoc@PACKAGE_SUFFIX@.pc
+ 
+ valadoc@PACKAGE_SUFFIX@.pc: valadoc.pc
+ 	cp $< $@
++if !ENABLE_GRAPHVIZ
++	sed -i "s/libgvc //g" $@
++endif
+ 
+ vapidir = $(datadir)/vala/vapi
+ dist_vapi_DATA = valadoc@PACKAGE_SUFFIX@.vapi
+@@ -214,6 +224,9 @@ nodist_vapi_DATA = valadoc@PACKAGE_SUFFIX@.deps
+ 
+ valadoc@PACKAGE_SUFFIX@.deps: valadoc.deps
+ 	cp $< $@
++if !ENABLE_GRAPHVIZ
++	sed -i "s/libgvc//g" $@
++endif
+ 
+ EXTRA_DIST = \
+ 	$(libvaladoc_la_VALASOURCES) \
+diff --git a/libvaladoc/html/basicdoclet.vala b/libvaladoc/html/basicdoclet.vala
+index 46578c28f..f6ce7097c 100644
+--- a/libvaladoc/html/basicdoclet.vala
++++ b/libvaladoc/html/basicdoclet.vala
+@@ -46,7 +46,11 @@ public abstract class Valadoc.Html.BasicDoclet : Api.Visitor, Doclet {
+ 	protected HtmlRenderer _renderer;
+ 	protected Html.MarkupWriter writer;
+ 	protected Html.CssClassResolver cssresolver;
++#if HAVE_GRAPHVIZ
+ 	protected Charts.Factory image_factory;
++#else
++	protected void* image_factory;
++#endif
+ 	protected ErrorReporter reporter;
+ 	protected string package_list_link = "../index.html";
+ 
+@@ -120,7 +124,9 @@ public abstract class Valadoc.Html.BasicDoclet : Api.Visitor, Doclet {
+ 		this.linker = new LinkHelper ();
+ 
+ 		_renderer = new HtmlRenderer (settings, this.linker, this.cssresolver);
++#if HAVE_GRAPHVIZ
+ 		this.image_factory = new SimpleChartFactory (settings, linker);
++#endif
+ 	}
+ 
+ 
+@@ -1025,6 +1031,7 @@ public abstract class Valadoc.Html.BasicDoclet : Api.Visitor, Doclet {
+ 	}
+ 
+ 	protected void write_image_block (Api.Node element) {
++#if HAVE_GRAPHVIZ
+ 		if (element is Class || element is Interface || element is Struct) {
+ 			unowned string format = (settings.use_svg_images ? "svg" : "png");
+ 			var chart = new Charts.Hierarchy (image_factory, element);
+@@ -1044,6 +1051,7 @@ public abstract class Valadoc.Html.BasicDoclet : Api.Visitor, Doclet {
+ 									   this.get_img_path_html (element, format)});
+ 			writer.add_usemap (chart);
+ 		}
++#endif
+ 	}
+ 
+ 	public void write_namespace_content (Namespace node, Api.Node? parent) {
+diff --git a/libvaladoc/html/htmlmarkupwriter.vala b/libvaladoc/html/htmlmarkupwriter.vala
+index 5aa4afdea..e79b0b8f5 100644
+--- a/libvaladoc/html/htmlmarkupwriter.vala
++++ b/libvaladoc/html/htmlmarkupwriter.vala
+@@ -51,12 +51,16 @@ public class Valadoc.Html.MarkupWriter : Valadoc.MarkupWriter {
+ 		}
+ 	}
+ 
++#if HAVE_GRAPHVIZ
+ 	public unowned MarkupWriter add_usemap (Charts.Chart chart) {
+ 		string? buf = (string?) chart.write_buffer ("cmapx");
+ 		if (buf != null) {
+ 			raw_text ("\n");
+ 			raw_text ((!) buf);
+ 		}
++#else
++	public unowned MarkupWriter add_usemap (void* chart) {
++#endif
+ 
+ 		return this;
+ 	}
diff --git a/pkgs/development/compilers/zig/default.nix b/pkgs/development/compilers/zig/default.nix
index 35ad09320dec..961e28da82e7 100644
--- a/pkgs/development/compilers/zig/default.nix
+++ b/pkgs/development/compilers/zig/default.nix
@@ -1,19 +1,23 @@
 { stdenv, fetchFromGitHub, cmake, llvmPackages, libxml2, zlib }:
 
 stdenv.mkDerivation rec {
-  version = "0.4.0";
+  version = "0.5.0";
   pname = "zig";
 
   src = fetchFromGitHub {
     owner = "ziglang";
     repo = pname;
     rev = version;
-    sha256 = "1cq6cc5pvybz9kn3y0j5gskkjq88hkmmcsva54mfzpcc65l3pv6p";
+    sha256 = "0xyl0riakh6kwb3yvxihb451kqs4ai4q0aygqygnlb2rlr1dn1zb";
   };
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ llvmPackages.clang-unwrapped llvmPackages.llvm libxml2 zlib ];
 
+  preBuild = ''
+    export HOME=$TMPDIR;
+  '';
+
   meta = with stdenv.lib; {
     description = "Programming languaged designed for robustness, optimality, and clarity";
     homepage = https://ziglang.org/;