diff --git a/pkgs/applications/science/misc/root/5.nix b/pkgs/applications/science/misc/root/5.nix
index 2d830e3d1016..dfe7b5eca97f 100644
--- a/pkgs/applications/science/misc/root/5.nix
+++ b/pkgs/applications/science/misc/root/5.nix
@@ -155,7 +155,7 @@ stdenv.mkDerivation rec {
     homepage = "https://root.cern.ch/";
     description = "A data analysis framework";
     platforms = platforms.unix;
-    broken = !stdenv.isx86_64;
+    broken = !stdenv.isx86_64 || stdenv.cc.isClang or false;
     maintainers = with maintainers; [ veprbl ];
     license = licenses.lgpl21;
   };
diff --git a/pkgs/development/compilers/cone/default.nix b/pkgs/development/compilers/cone/default.nix
index 9344160ad762..d94432be12d3 100644
--- a/pkgs/development/compilers/cone/default.nix
+++ b/pkgs/development/compilers/cone/default.nix
@@ -6,13 +6,13 @@
 
 llvmPackages.stdenv.mkDerivation rec {
   pname = "cone";
-  version = "unstable-2021-07-25";
+  version = "unstable-2022-12-12";
 
   src = fetchFromGitHub {
     owner = "jondgoodwin";
     repo = pname;
-    rev = "5feaabc342bcff3755f638a7e25155cd12127592";
-    sha256 = "CTDS83AWtuDY5g6NDn7O2awrYsKFf3Kp35FkMEjfbVw=";
+    rev = "698bd6afc75777eabbc8ef576d64d683c6a1c5ab";
+    sha256 = "0y2s9xgkci8n72v6gnc1i7shr2y3g2sa8fbr25gpxa9ipiq9khg7";
   };
 
   nativeBuildInputs = [ cmake ];
@@ -21,10 +21,10 @@ llvmPackages.stdenv.mkDerivation rec {
     llvmPackages.llvm
   ];
 
+  # M68k is an experimental target, so not enabled by default
   postPatch = ''
     sed -i CMakeLists.txt \
-        -e 's/LLVM 7/LLVM/' \
-        -e '/AVR/d'
+        -e '/M68k/d'
   '';
 
   installPhase = ''
diff --git a/pkgs/development/compilers/ghc/8.6.5-binary.nix b/pkgs/development/compilers/ghc/8.6.5-binary.nix
index d7d2578cdc49..58e61604cd61 100644
--- a/pkgs/development/compilers/ghc/8.6.5-binary.nix
+++ b/pkgs/development/compilers/ghc/8.6.5-binary.nix
@@ -10,7 +10,9 @@
 assert stdenv.targetPlatform == stdenv.hostPlatform;
 
 let
-  useLLVM = !stdenv.targetPlatform.isx86;
+  useLLVM = !(stdenv.targetPlatform.isx86
+              || stdenv.targetPlatform.isPower
+              || stdenv.targetPlatform.isSparc);
 
   useNcurses6 = stdenv.hostPlatform.system == "x86_64-linux"
                 || (with stdenv.hostPlatform; isPower64 && isLittleEndian);
@@ -38,7 +40,7 @@ let
     targetPackages.stdenv.cc.bintools
     coreutils # for cat
   ]
-  ++ lib.optionals useLLVM [
+  ++ lib.optionals (assert useLLVM -> !(llvmPackages == null); useLLVM) [
     (lib.getBin llvmPackages.llvm)
   ]
   # On darwin, we need unwrapped bintools as well (for otool)
@@ -66,10 +68,6 @@ stdenv.mkDerivation rec {
       url = "${downloadsUrl}/${version}/ghc-${version}-x86_64-fedora27-linux.tar.xz";
       sha256 = "18dlqm5d028fqh6ghzn7pgjspr5smw030jjzl3kq6q1kmwzbay6g";
     };
-    aarch64-linux = {
-      url = "${downloadsUrl}/${version}/ghc-${version}-aarch64-ubuntu18.04-linux.tar.xz";
-      sha256 = "11n7l2a36i5vxzzp85la2555q4m34l747g0pnmd81cp46y85hlhq";
-    };
     x86_64-darwin = {
       url = "${downloadsUrl}/${version}/ghc-${version}-x86_64-apple-darwin.tar.xz";
       sha256 = "0s9188vhhgf23q3rjarwhbr524z6h2qga5xaaa2pma03sfqvvhfz";
@@ -216,7 +214,12 @@ stdenv.mkDerivation rec {
 
   meta = rec {
     license = lib.licenses.bsd3;
-    platforms = ["x86_64-linux" "i686-linux" "x86_64-darwin" "powerpc64le-linux" ];
+    platforms = [
+      "x86_64-linux"
+      "i686-linux"
+      "x86_64-darwin"
+      "powerpc64le-linux"
+    ];
     # build segfaults, use ghc8102Binary which has proper musl support instead
     broken = stdenv.hostPlatform.isMusl;
     maintainers = with lib.maintainers; [
diff --git a/pkgs/development/compilers/ghc/8.8.4.nix b/pkgs/development/compilers/ghc/8.8.4.nix
deleted file mode 100644
index b00b6183121d..000000000000
--- a/pkgs/development/compilers/ghc/8.8.4.nix
+++ /dev/null
@@ -1,381 +0,0 @@
-{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
-
-# build-tools
-, bootPkgs
-, autoconf, automake, coreutils, fetchpatch, fetchurl, perl, python3, m4, sphinx
-, bash
-
-, libiconv ? null, ncurses
-
-, # GHC can be built with system libffi or a bundled one.
-  libffi ? null
-
-, useLLVM ? !(stdenv.targetPlatform.isx86
-              || stdenv.targetPlatform.isPower
-              || stdenv.targetPlatform.isSparc)
-, # LLVM is conceptually a run-time-only dependency, but for
-  # non-x86, we need LLVM to bootstrap later stages, so it becomes a
-  # build-time dependency too.
-  buildTargetLlvmPackages, llvmPackages
-
-, # If enabled, GHC will be built with the GPL-free but slower integer-simple
-  # library instead of the faster but GPLed integer-gmp library.
-  enableIntegerSimple ? !(lib.meta.availableOn stdenv.hostPlatform gmp
-                          && lib.meta.availableOn stdenv.targetPlatform gmp)
-, gmp
-
-, # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
-
-, enableProfiledLibs ? true
-
-, # Whether to build dynamic libs for the standard library (on the target
-  # platform). Static libs are always built.
-  enableShared ? !stdenv.targetPlatform.isWindows && !stdenv.targetPlatform.useiOSPrebuilt
-
-, # Whether to build terminfo.
-  enableTerminfo ? !stdenv.targetPlatform.isWindows
-
-, # What flavour to build. An empty string indicates no
-  # specific flavour and falls back to ghc default values.
-  ghcFlavour ? lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform)
-    (if useLLVM then "perf-cross" else "perf-cross-ncg")
-
-, #  Whether to build sphinx documentation.
-  enableDocs ? (
-    # Docs disabled for musl and cross because it's a large task to keep
-    # all `sphinx` dependencies building in those environments.
-    # `sphinx` pullls in among others:
-    # Ruby, Python, Perl, Rust, OpenGL, Xorg, gtk, LLVM.
-    (stdenv.targetPlatform == stdenv.hostPlatform)
-    && !stdenv.hostPlatform.isMusl
-  )
-
-, enableHaddockProgram ?
-    # Disabled for cross; see note [HADDOCK_DOCS].
-    (stdenv.targetPlatform == stdenv.hostPlatform)
-
-, # Whether to disable the large address space allocator
-  # necessary fix for iOS: https://www.reddit.com/r/haskell/comments/4ttdz1/building_an_osxi386_to_iosarm64_cross_compiler/d5qvd67/
-  disableLargeAddressSpace ? stdenv.targetPlatform.isiOS
-}:
-
-assert !enableIntegerSimple -> gmp != null;
-
-# Cross cannot currently build the `haddock` program for silly reasons,
-# see note [HADDOCK_DOCS].
-assert (stdenv.targetPlatform != stdenv.hostPlatform) -> !enableHaddockProgram;
-
-let
-  inherit (stdenv) buildPlatform hostPlatform targetPlatform;
-
-  inherit (bootPkgs) ghc;
-
-  # TODO(@Ericson2314) Make unconditional
-  targetPrefix = lib.optionalString
-    (targetPlatform != hostPlatform)
-    "${targetPlatform.config}-";
-
-  buildMK = dontStrip: ''
-    BuildFlavour = ${ghcFlavour}
-    ifneq \"\$(BuildFlavour)\" \"\"
-    include mk/flavours/\$(BuildFlavour).mk
-    endif
-    BUILD_SPHINX_HTML = ${if enableDocs then "YES" else "NO"}
-    BUILD_SPHINX_PDF = NO
-  '' +
-  # Note [HADDOCK_DOCS]:
-  # Unfortunately currently `HADDOCK_DOCS` controls both whether the `haddock`
-  # program is built (which we generally always want to have a complete GHC install)
-  # and whether it is run on the GHC sources to generate hyperlinked source code
-  # (which is impossible for cross-compilation); see:
-  # https://gitlab.haskell.org/ghc/ghc/-/issues/20077
-  # This implies that currently a cross-compiled GHC will never have a `haddock`
-  # program, so it can never generate haddocks for any packages.
-  # If this is solved in the future, we'd like to unconditionally
-  # build the haddock program (removing the `enableHaddockProgram` option).
-  ''
-    HADDOCK_DOCS = ${if enableHaddockProgram then "YES" else "NO"}
-    DYNAMIC_GHC_PROGRAMS = ${if enableShared then "YES" else "NO"}
-    INTEGER_LIBRARY = ${if enableIntegerSimple then "integer-simple" else "integer-gmp"}
-  ''
-    # We only need to build stage1 on most cross-compilation because
-    # we will be running the compiler on the native system. In some
-    # situations, like native Musl compilation, we need the compiler
-    # to actually link to our new Libc. The iOS simulator is a special
-    # exception because we can’t actually run simulators binaries
-    # ourselves.
-  + lib.optionalString (targetPlatform != hostPlatform) ''
-    Stage1Only = ${if (targetPlatform.system == hostPlatform.system && !targetPlatform.isiOS) then "NO" else "YES"}
-    CrossCompilePrefix = ${targetPrefix}
-  '' + lib.optionalString dontStrip ''
-    STRIP_CMD = :
-  '' + lib.optionalString (!enableProfiledLibs) ''
-    GhcLibWays = "v dyn"
-  '' + lib.optionalString enableRelocatedStaticLibs ''
-    GhcLibHcOpts += -fPIC
-    GhcRtsHcOpts += -fPIC
-  '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
-    EXTRA_CC_OPTS += -std=gnu99
-  ''
-  # While split sections are now enabled by default in ghc 8.8 for windows,
-  # they seem to lead to `too many sections` errors when building base for
-  # profiling.
-  + lib.optionalString targetPlatform.isWindows ''
-    SplitSections = NO
-  '';
-
-  # Splicer will pull out correct variations
-  libDeps = platform: lib.optional enableTerminfo ncurses
-    ++ [libffi]
-    ++ lib.optional (!enableIntegerSimple) gmp
-    ++ lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv;
-
-  # TODO(@sternenseemann): is buildTarget LLVM unnecessary?
-  # GHC doesn't seem to have {LLC,OPT}_HOST
-  toolsForTarget = [
-    pkgsBuildTarget.targetPackages.stdenv.cc
-  ] ++ lib.optional useLLVM buildTargetLlvmPackages.llvm;
-
-  targetCC = builtins.head toolsForTarget;
-
-  # Use gold either following the default, or to avoid the BFD linker due to some bugs / perf issues.
-  # But we cannot avoid BFD when using musl libc due to https://sourceware.org/bugzilla/show_bug.cgi?id=23856
-  # see #84670 and #49071 for more background.
-  useLdGold = targetPlatform.linker == "gold" ||
-    (targetPlatform.linker == "bfd" && (targetCC.bintools.bintools.hasGold or false) && !targetPlatform.isMusl);
-
-  # Makes debugging easier to see which variant is at play in `nix-store -q --tree`.
-  variantSuffix = lib.concatStrings [
-    (lib.optionalString stdenv.hostPlatform.isMusl "-musl")
-    (lib.optionalString enableIntegerSimple "-integer-simple")
-  ];
-
-in
-
-# C compiler, bintools and LLVM are used at build time, but will also leak into
-# the resulting GHC's settings file and used at runtime. This means that we are
-# currently only able to build GHC if hostPlatform == buildPlatform.
-assert targetCC == pkgsHostTarget.targetPackages.stdenv.cc;
-assert buildTargetLlvmPackages.llvm == llvmPackages.llvm;
-assert stdenv.targetPlatform.isDarwin -> buildTargetLlvmPackages.clang == llvmPackages.clang;
-
-stdenv.mkDerivation (rec {
-  version = "8.8.4";
-  pname = "${targetPrefix}ghc${variantSuffix}";
-
-  src = fetchurl {
-    url = "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz";
-    sha256 = "0bgwbxxvdn56l91bp9p5d083gzcfdi6z8l8b17qzjpr3n8w5wl7h";
-  };
-
-  enableParallelBuilding = true;
-
-  outputs = [ "out" "doc" ];
-
-  patches = [
-    # Fix docs build with sphinx >= 6.0
-    # https://gitlab.haskell.org/ghc/ghc/-/issues/22766
-    ./ghc-8.8.4-sphinx-6.0.patch
-
-    # See upstream patch at
-    # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/4885. Since we build
-    # from source distributions, the auto-generated configure script needs to be
-    # patched as well, therefore we use an in-tree patch instead of pulling the
-    # upstream patch. Don't forget to check backport status of the upstream patch
-    # when adding new GHC releases in nixpkgs.
-    ./respect-ar-path.patch
-    # Fix documentation configuration which causes a syntax error with sphinx 4.*
-    # See also https://gitlab.haskell.org/ghc/ghc/-/issues/19962
-    ./sphinx-4-configuration.patch
-    # cabal passes incorrect --host= when cross-compiling
-    # https://github.com/haskell/cabal/issues/5887
-    (fetchpatch {
-            url = "https://raw.githubusercontent.com/input-output-hk/haskell.nix/122bd81150386867da07fdc9ad5096db6719545a/overlays/patches/ghc/cabal-host.patch";
-      sha256 = "sha256:0yd0sajgi24sc1w5m55lkg2lp6kfkgpp3lgija2c8y3cmkwfpdc1";
-    })
-
-    # error: 'VirtualAllocExNuma' redeclared as different kind of symbol
-    # name conflict between rts/win32/OSMem.c and winbase.h from the mingw-w64 runtime package
-    # Renamed to match ghc8.8:
-    # https://gitlab.haskell.org/ghc/ghc/-/commit/4b431f334018eaef2cf36de3316025c68c922915#20d64c0bdc272817149d1d5cf20a73a8b5fd637f
-    ./rename-numa-api-call.patch
-  ];
-
-  postPatch = "patchShebangs .";
-
-  # GHC is a bit confused on its cross terminology.
-  # TODO(@sternenseemann): investigate coreutils dependencies and pass absolute paths
-  preConfigure =
-    # Aarch64 allow backward bootstrapping since earlier versions are unstable.
-    # Same for musl, as earlier versions do not provide a musl bindist for bootstrapping.
-    lib.optionalString (stdenv.isAarch64 || stdenv.hostPlatform.isMusl) ''
-      find . -name \*\.cabal\* -exec sed -i -e 's/\(base.*\)4.14/\14.16/' {} \; \
-        -exec sed -i -e 's/\(prim.*\)0.6/\10.8/' {} \;
-    ''
-  + ''
-    for env in $(env | grep '^TARGET_' | sed -E 's|\+?=.*||'); do
-      export "''${env#TARGET_}=''${!env}"
-    done
-    # GHC is a bit confused on its cross terminology, as these would normally be
-    # the *host* tools.
-    export CC="${targetCC}/bin/${targetCC.targetPrefix}cc"
-    export CXX="${targetCC}/bin/${targetCC.targetPrefix}c++"
-    # Use gold to work around https://sourceware.org/bugzilla/show_bug.cgi?id=16177
-    export LD="${targetCC.bintools}/bin/${targetCC.bintools.targetPrefix}ld${lib.optionalString useLdGold ".gold"}"
-    export AS="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}as"
-    export AR="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}ar"
-    export NM="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}nm"
-    export RANLIB="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}ranlib"
-    export READELF="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}readelf"
-    export STRIP="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}strip"
-  '' + lib.optionalString useLLVM ''
-    export LLC="${lib.getBin buildTargetLlvmPackages.llvm}/bin/llc"
-    export OPT="${lib.getBin buildTargetLlvmPackages.llvm}/bin/opt"
-  '' + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
-    # LLVM backend on Darwin needs clang: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
-    export CLANG="${buildTargetLlvmPackages.clang}/bin/${buildTargetLlvmPackages.clang.targetPrefix}clang"
-  '' + ''
-
-    echo -n "${buildMK dontStrip}" > mk/build.mk
-    sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
-  '' + lib.optionalString (!stdenv.isDarwin) ''
-    export NIX_LDFLAGS+=" -rpath $out/lib/ghc-${version}"
-  '' + lib.optionalString stdenv.isDarwin ''
-    export NIX_LDFLAGS+=" -no_dtrace_dof"
-  '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
-    sed -i -e '5i ,("armv7a-unknown-linux-androideabi", ("e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64", "cortex-a8", ""))' llvm-targets
-  '' + lib.optionalString targetPlatform.isMusl ''
-      echo "patching llvm-targets for musl targets..."
-      echo "Cloning these existing '*-linux-gnu*' targets:"
-      grep linux-gnu llvm-targets | sed 's/^/  /'
-      echo "(go go gadget sed)"
-      sed -i 's,\(^.*linux-\)gnu\(.*\)$,\0\n\1musl\2,' llvm-targets
-      echo "llvm-targets now contains these '*-linux-musl*' targets:"
-      grep linux-musl llvm-targets | sed 's/^/  /'
-
-      echo "And now patching to preserve '-musleabi' as done with '-gnueabi'"
-      # (aclocal.m4 is actual source, but patch configure as well since we don't re-gen)
-      for x in configure aclocal.m4; do
-        substituteInPlace $x \
-          --replace '*-android*|*-gnueabi*)' \
-                    '*-android*|*-gnueabi*|*-musleabi*)'
-      done
-  '';
-
-  # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ]
-    ++ lib.optional (targetPlatform != hostPlatform) "target";
-
-  # `--with` flags for libraries needed for RTS linker
-  configureFlags = [
-    "--datadir=$doc/share/doc/ghc"
-    "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${ncurses.out}/lib"
-  ] ++ lib.optionals (libffi != null) [
-    "--with-system-libffi"
-    "--with-ffi-includes=${targetPackages.libffi.dev}/include"
-    "--with-ffi-libraries=${targetPackages.libffi.out}/lib"
-  ] ++ lib.optionals (targetPlatform == hostPlatform && !enableIntegerSimple) [
-    "--with-gmp-includes=${targetPackages.gmp.dev}/include"
-    "--with-gmp-libraries=${targetPackages.gmp.out}/lib"
-  ] ++ lib.optionals (targetPlatform == hostPlatform && hostPlatform.libc != "glibc" && !targetPlatform.isWindows) [
-    "--with-iconv-includes=${libiconv}/include"
-    "--with-iconv-libraries=${libiconv}/lib"
-  ] ++ lib.optionals (targetPlatform != hostPlatform) [
-    "--enable-bootstrap-with-devel-snapshot"
-  ] ++ lib.optionals useLdGold [
-    "CFLAGS=-fuse-ld=gold"
-    "CONF_GCC_LINKER_OPTS_STAGE1=-fuse-ld=gold"
-    "CONF_GCC_LINKER_OPTS_STAGE2=-fuse-ld=gold"
-  ] ++ lib.optionals (disableLargeAddressSpace) [
-    "--disable-large-address-space"
-  ];
-
-  # Make sure we never relax`$PATH` and hooks support for compatibility.
-  strictDeps = true;
-
-  # Don’t add -liconv to LDFLAGS automatically so that GHC will add it itself.
-  dontAddExtraLibs = true;
-
-  nativeBuildInputs = [
-    perl autoconf automake m4 python3
-    ghc bootPkgs.alex bootPkgs.happy bootPkgs.hscolour
-  ] ++ lib.optionals enableDocs [
-    sphinx
-  ];
-
-  # For building runtime libs
-  depsBuildTarget = toolsForTarget;
-
-  buildInputs = [ perl bash ] ++ (libDeps hostPlatform);
-
-  depsTargetTarget = map lib.getDev (libDeps targetPlatform);
-  depsTargetTargetPropagated = map (lib.getOutput "out") (libDeps targetPlatform);
-
-  # required, because otherwise all symbols from HSffi.o are stripped, and
-  # that in turn causes GHCi to abort
-  stripDebugFlags = [ "-S" ] ++ lib.optional (!targetPlatform.isDarwin) "--keep-file-symbols";
-
-  checkTarget = "test";
-
-  hardeningDisable =
-    [ "format" ]
-    # In nixpkgs, musl based builds currently enable `pie` hardening by default
-    # (see `defaultHardeningFlags` in `make-derivation.nix`).
-    # But GHC cannot currently produce outputs that are ready for `-pie` linking.
-    # Thus, disable `pie` hardening, otherwise `recompile with -fPIE` errors appear.
-    # See:
-    # * https://github.com/NixOS/nixpkgs/issues/129247
-    # * https://gitlab.haskell.org/ghc/ghc/-/issues/19580
-    ++ lib.optional stdenv.targetPlatform.isMusl "pie";
-
-  postInstall = ''
-    # Install the bash completion file.
-    install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/${targetPrefix}ghc
-  '';
-
-  passthru = {
-    inherit bootPkgs targetPrefix;
-
-    inherit llvmPackages;
-    inherit enableShared;
-
-    # This is used by the haskell builder to query
-    # the presence of the haddock program.
-    hasHaddock = enableHaddockProgram;
-
-    # Our Cabal compiler name
-    haskellCompilerName = "ghc-${version}";
-  };
-
-  meta = {
-    homepage = "http://haskell.org/ghc";
-    description = "The Glasgow Haskell Compiler";
-    maintainers = with lib.maintainers; [
-      guibou
-    ] ++ lib.teams.haskell.members;
-    timeout = 24 * 3600;
-    inherit (ghc.meta) license;
-    # hardcode platforms because the bootstrap GHC differs depending on the platform,
-    # with differing platforms available for each of them; See HACK comment in
-    # 8.10.2-binary.nix for an explanation of the musl special casing.
-    platforms = [
-      "x86_64-linux"
-    ] ++ lib.optionals (!hostPlatform.isMusl) [
-      "i686-linux"
-      "aarch64-linux"
-      "x86_64-darwin"
-    ];
-    # integer-simple builds are broken with musl when bootstrapping using
-    # GHC 8.10.2 and below, however it is not possible to reverse bootstrap
-    # GHC 8.8.4 with GHC 8.10.7.
-    # See https://github.com/NixOS/nixpkgs/pull/138523#issuecomment-927339953
-    broken = hostPlatform.isMusl && enableIntegerSimple;
-  };
-
-  dontStrip = (targetPlatform.useAndroidPrebuilt || targetPlatform.isWasm);
-
-} // lib.optionalAttrs targetPlatform.useAndroidPrebuilt{
-  dontPatchELF = true;
-  noAuditTmpdir = true;
-})
diff --git a/pkgs/development/compilers/llvm/7/clang/HIP-use-PATH-7.patch b/pkgs/development/compilers/llvm/7/clang/HIP-use-PATH-7.patch
deleted file mode 100644
index 764dddd966cb..000000000000
--- a/pkgs/development/compilers/llvm/7/clang/HIP-use-PATH-7.patch
+++ /dev/null
@@ -1,68 +0,0 @@
-From 8412cba68835f8f4cc527d02194b181faa5944d4 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Holger=20W=C3=BCnsche?= <holger.o.wuensche@t-online.de>
-Date: Tue, 21 Jan 2020 19:46:09 +0100
-Subject: [PATCH] [HIP] use GetProgramPath for executable discovery
-
-This change replaces the manual building of executable paths
-using llvm::sys::path::append with GetProgramPath.
-This enables adding other paths in case executables reside
-in different directories and makes the code easier to read.
-
-Differential Revision: https://reviews.llvm.org/D72903
----
- clang/lib/Driver/ToolChains/HIP.cpp | 18 ++++++------------
- 1 file changed, 6 insertions(+), 12 deletions(-)
-
-diff --git a/lib/Driver/ToolChains/HIP.cpp b/lib/Driver/ToolChains/HIP.cpp
-index 03acf45a9b3..75fd3226c75 100644
---- a/lib/Driver/ToolChains/HIP.cpp
-+++ b/lib/Driver/ToolChains/HIP.cpp
-@@ -98,9 +98,8 @@ const char *AMDGCN::Linker::constructLLVMLinkCommand(
-   const char *OutputFileName =
-       C.addTempFile(C.getArgs().MakeArgString(TmpName));
-   CmdArgs.push_back(OutputFileName);
--  SmallString<128> ExecPath(C.getDriver().Dir);
--  llvm::sys::path::append(ExecPath, "llvm-link");
--  const char *Exec = Args.MakeArgString(ExecPath);
-+  const char *Exec =
-+      Args.MakeArgString(getToolChain().GetProgramPath("llvm-link"));
-   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
-   return OutputFileName;
- }
-@@ -141,9 +140,8 @@ const char *AMDGCN::Linker::constructOptCommand(
-   const char *OutputFileName =
-       C.addTempFile(C.getArgs().MakeArgString(TmpFileName));
-   OptArgs.push_back(OutputFileName);
--  SmallString<128> OptPath(C.getDriver().Dir);
--  llvm::sys::path::append(OptPath, "opt");
--  const char *OptExec = Args.MakeArgString(OptPath);
-+  const char *OptExec =
-+      Args.MakeArgString(getToolChain().GetProgramPath("opt"));
-   C.addCommand(llvm::make_unique<Command>(JA, *this, OptExec, OptArgs, Inputs));
-   return OutputFileName;
- }
-@@ -161,9 +159,7 @@ const char *AMDGCN::Linker::constructLlcCommand(
-   const char *LlcOutputFile =
-       C.addTempFile(C.getArgs().MakeArgString(LlcOutputFileName));
-   LlcArgs.push_back(LlcOutputFile);
--  SmallString<128> LlcPath(C.getDriver().Dir);
--  llvm::sys::path::append(LlcPath, "llc");
--  const char *Llc = Args.MakeArgString(LlcPath);
-+  const char *Llc = Args.MakeArgString(getToolChain().GetProgramPath("llc"));
-   C.addCommand(llvm::make_unique<Command>(JA, *this, Llc, LlcArgs, Inputs));
-   return LlcOutputFile;
- }
-@@ -178,9 +174,7 @@ void AMDGCN::Linker::constructLldCommand(Compilation &C, const JobAction &JA,
-   ArgStringList LldArgs{"-flavor",    "gnu", "--no-undefined",
-                         "-shared",    "-o",  Output.getFilename(),
-                         InputFileName};
--  SmallString<128> LldPath(C.getDriver().Dir);
--  llvm::sys::path::append(LldPath, "lld");
--  const char *Lld = Args.MakeArgString(LldPath);
-+  const char *Lld = Args.MakeArgString(getToolChain().GetProgramPath("lld"));
-   C.addCommand(llvm::make_unique<Command>(JA, *this, Lld, LldArgs, Inputs));
- }
- 
--- 
-2.23.1
-
diff --git a/pkgs/development/compilers/llvm/7/clang/default.nix b/pkgs/development/compilers/llvm/7/clang/default.nix
deleted file mode 100644
index 136a69e72161..000000000000
--- a/pkgs/development/compilers/llvm/7/clang/default.nix
+++ /dev/null
@@ -1,139 +0,0 @@
-{ lib, stdenv, llvm_meta, fetch, substituteAll, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
-, buildLlvmTools
-, fixDarwinDylibNames
-, enableManpages ? false
-, enablePolly ? false # TODO: get this info from llvm (passthru?)
-}:
-
-let
-  self = stdenv.mkDerivation ({
-    pname = "clang";
-    inherit version;
-
-    src = fetch "cfe" "0vc4i87qwxnw9lci4ayws9spakg0z6w5w670snj9f8g5m9rc8zg9";
-
-    unpackPhase = ''
-      unpackFile $src
-      mv cfe-${version}* clang
-      sourceRoot=$PWD/clang
-      unpackFile ${clang-tools-extra_src}
-      mv clang-tools-extra-* $sourceRoot/tools/extra
-    '';
-
-    nativeBuildInputs = [ cmake python3 ]
-      ++ lib.optional enableManpages python3.pkgs.sphinx
-      ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
-
-    buildInputs = [ libxml2 libllvm ];
-
-    cmakeFlags = [
-      "-DCMAKE_CXX_FLAGS=-std=c++11"
-      "-DLLVM_ENABLE_RTTI=ON"
-      "-DLLVM_CONFIG_PATH=${libllvm.dev}/bin/llvm-config${lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) "-native"}"
-    ] ++ lib.optionals enableManpages [
-      "-DCLANG_INCLUDE_DOCS=ON"
-      "-DLLVM_ENABLE_SPHINX=ON"
-      "-DSPHINX_OUTPUT_MAN=ON"
-      "-DSPHINX_OUTPUT_HTML=OFF"
-      "-DSPHINX_WARNINGS_AS_ERRORS=OFF"
-    ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
-      "-DLLVM_TABLEGEN_EXE=${buildLlvmTools.llvm}/bin/llvm-tblgen"
-      "-DCLANG_TABLEGEN=${buildLlvmTools.libclang.dev}/bin/clang-tblgen"
-    ] ++ lib.optionals enablePolly [
-      "-DWITH_POLLY=ON"
-      "-DLINK_POLLY_INTO_TOOLS=ON"
-    ];
-
-    patches = [
-      ../../common/clang/5-8-purity.patch
-      # make clang -xhip use $PATH to find executables
-      ./HIP-use-PATH-7.patch
-      # Backport for the `--unwindlib=[libgcc|compiler-rt]` flag, which is
-      # needed for our bootstrapping to not interfere with C.
-      ./unwindlib.patch
-      ./gnu-install-dirs.patch
-      (substituteAll {
-        src = ../../clang-6-10-LLVMgold-path.patch;
-        libllvmLibdir = "${libllvm.lib}/lib";
-      })
-    ];
-
-    postPatch = ''
-      sed -i -e 's/DriverArgs.hasArg(options::OPT_nostdlibinc)/true/' \
-             -e 's/Args.hasArg(options::OPT_nostdlibinc)/true/' \
-             lib/Driver/ToolChains/*.cpp
-    '' + lib.optionalString stdenv.hostPlatform.isMusl ''
-      sed -i -e 's/lgcc_s/lgcc_eh/' lib/Driver/ToolChains/*.cpp
-    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
-      substituteInPlace tools/extra/clangd/CMakeLists.txt \
-        --replace "NOT HAVE_CXX_ATOMICS64_WITHOUT_LIB" FALSE
-    '';
-
-    outputs = [ "out" "lib" "dev" "python" ];
-
-    postInstall = ''
-      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,scan-view}
-      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
-      mv $out/share/scan-view/*.py $python/share/scan-view
-      rm $out/bin/c-index-test
-      patchShebangs $python/bin
-
-      mkdir -p $dev/bin
-      cp bin/clang-tblgen $dev/bin
-    '';
-
-    passthru = {
-      inherit libllvm;
-      isClang = true;
-      hardeningUnsupportedFlags = [ "fortify3" ];
-    };
-
-    meta = llvm_meta // {
-      homepage = "https://clang.llvm.org/";
-      description = "A C language family frontend for LLVM";
-      longDescription = ''
-        The Clang project provides a language front-end and tooling
-        infrastructure for languages in the C language family (C, C++, Objective
-        C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project.
-        It aims to deliver amazingly fast compiles, extremely useful error and
-        warning messages and to provide a platform for building great source
-        level tools. The Clang Static Analyzer and clang-tidy are tools that
-        automatically find bugs in your code, and are great examples of the sort
-        of tools that can be built using the Clang frontend as a library to
-        parse C/C++ code.
-      '';
-      mainProgram = "clang";
-    };
-  } // 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 = llvm_meta // {
-      description = "man page for Clang ${version}";
-    };
-  });
-in self
diff --git a/pkgs/development/compilers/llvm/7/clang/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/7/clang/gnu-install-dirs.patch
deleted file mode 100644
index 540c043a2db9..000000000000
--- a/pkgs/development/compilers/llvm/7/clang/gnu-install-dirs.patch
+++ /dev/null
@@ -1,281 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 52b881939499..85662a2113e7 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -5,6 +5,8 @@ cmake_minimum_required(VERSION 3.4.3)
- if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR )
-   project(Clang)
- 
-+  include(GNUInstallDirs)
-+
-   # Rely on llvm-config.
-   set(CONFIG_OUTPUT)
-   find_program(LLVM_CONFIG "llvm-config")
-@@ -374,7 +376,7 @@ include_directories(BEFORE
- 
- if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-   install(DIRECTORY include/clang include/clang-c
--    DESTINATION include
-+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-     FILES_MATCHING
-     PATTERN "*.def"
-     PATTERN "*.h"
-@@ -383,7 +385,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-     )
- 
-   install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/include/clang
--    DESTINATION include
-+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-     FILES_MATCHING
-     PATTERN "CMakeFiles" EXCLUDE
-     PATTERN "*.inc"
-@@ -391,7 +393,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-     )
- 
-   install(PROGRAMS utils/bash-autocomplete.sh
--    DESTINATION share/clang
-+    DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-     )
- endif()
- 
-diff --git a/cmake/modules/AddClang.cmake b/cmake/modules/AddClang.cmake
-index c09a8423f9f6..39f37e0097eb 100644
---- a/cmake/modules/AddClang.cmake
-+++ b/cmake/modules/AddClang.cmake
-@@ -99,9 +99,9 @@ macro(add_clang_library name)
-       install(TARGETS ${name}
-         COMPONENT ${name}
-         ${export_to_clangtargets}
--        LIBRARY DESTINATION lib${LLVM_LIBDIR_SUFFIX}
--        ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX}
--        RUNTIME DESTINATION bin)
-+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}
-+        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}
-+        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
- 
-       if (${ARG_SHARED} AND NOT CMAKE_CONFIGURATION_TYPES)
-         add_llvm_install_targets(install-${name}
-@@ -141,7 +141,7 @@ macro(add_clang_tool name)
- 
-     install(TARGETS ${name}
-       ${export_to_clangtargets}
--      RUNTIME DESTINATION bin
-+      RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-       COMPONENT ${name})
- 
-     if(NOT CMAKE_CONFIGURATION_TYPES)
-@@ -156,5 +156,5 @@ endmacro()
- macro(add_clang_symlink name dest)
-   add_llvm_tool_symlink(${name} ${dest} ALWAYS_GENERATE)
-   # Always generate install targets
--  llvm_install_symlink(${name} ${dest} ALWAYS_GENERATE)
-+  llvm_install_symlink(${name} ${dest} ${CMAKE_INSTALL_FULL_BINDIR} ALWAYS_GENERATE)
- endmacro()
-diff --git a/lib/Headers/CMakeLists.txt b/lib/Headers/CMakeLists.txt
-index 1930d8e225c7..bb9158093079 100644
---- a/lib/Headers/CMakeLists.txt
-+++ b/lib/Headers/CMakeLists.txt
-@@ -162,19 +162,19 @@ install(
-   FILES ${files} ${CMAKE_CURRENT_BINARY_DIR}/arm_neon.h
-   COMPONENT clang-headers
-   PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
--  DESTINATION lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}/include)
-+  DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}/include)
- 
- install(
-   FILES ${files} ${CMAKE_CURRENT_BINARY_DIR}/arm_fp16.h
-   COMPONENT clang-headers
-   PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
--  DESTINATION lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}/include)
-+  DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}/include)
- 
- install(
-   FILES ${cuda_wrapper_files}
-   COMPONENT clang-headers
-   PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
--  DESTINATION lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}/include/cuda_wrappers)
-+  DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}/include/cuda_wrappers)
- 
- if (NOT CMAKE_CONFIGURATION_TYPES) # don't add this for IDE's.
-   add_llvm_install_targets(install-clang-headers
-diff --git a/tools/c-index-test/CMakeLists.txt b/tools/c-index-test/CMakeLists.txt
-index 53e3421f1b35..79ae5bb4c399 100644
---- a/tools/c-index-test/CMakeLists.txt
-+++ b/tools/c-index-test/CMakeLists.txt
-@@ -54,7 +54,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-     set_property(TARGET c-index-test APPEND PROPERTY INSTALL_RPATH
-        "@executable_path/../../lib")
-   else()
--    set(INSTALL_DESTINATION bin)
-+    set(INSTALL_DESTINATION ${CMAKE_INSTALL_BINDIR})
-   endif()
- 
-   install(TARGETS c-index-test
-diff --git a/tools/clang-check/CMakeLists.txt b/tools/clang-check/CMakeLists.txt
-index c5ace26c2914..97bdfca7d896 100644
---- a/tools/clang-check/CMakeLists.txt
-+++ b/tools/clang-check/CMakeLists.txt
-@@ -20,4 +20,4 @@ target_link_libraries(clang-check
-   )
- 
- install(TARGETS clang-check
--  RUNTIME DESTINATION bin)
-+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-diff --git a/tools/clang-format/CMakeLists.txt b/tools/clang-format/CMakeLists.txt
-index a295e8cd0b2a..1973ff82c7f6 100644
---- a/tools/clang-format/CMakeLists.txt
-+++ b/tools/clang-format/CMakeLists.txt
-@@ -21,20 +21,20 @@ if( LLVM_LIB_FUZZING_ENGINE OR LLVM_USE_SANITIZE_COVERAGE )
- endif()
- 
- install(PROGRAMS clang-format-bbedit.applescript
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-format)
- install(PROGRAMS clang-format-diff.py
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-format)
- install(PROGRAMS clang-format-sublime.py
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-format)
- install(PROGRAMS clang-format.el
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-format)
- install(PROGRAMS clang-format.py
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-format)
- install(PROGRAMS git-clang-format
--  DESTINATION bin
-+  DESTINATION ${CMAKE_INSTALL_BINDIR}
-   COMPONENT clang-format)
-diff --git a/tools/clang-func-mapping/CMakeLists.txt b/tools/clang-func-mapping/CMakeLists.txt
-index ae28e28d532d..8ecb2e37a8f7 100644
---- a/tools/clang-func-mapping/CMakeLists.txt
-+++ b/tools/clang-func-mapping/CMakeLists.txt
-@@ -20,4 +20,4 @@ target_link_libraries(clang-func-mapping
-   )
- 
- install(TARGETS clang-func-mapping
--  RUNTIME DESTINATION bin)
-+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-diff --git a/tools/clang-offload-bundler/CMakeLists.txt b/tools/clang-offload-bundler/CMakeLists.txt
-index 8718015be76a..7a038f39622e 100644
---- a/tools/clang-offload-bundler/CMakeLists.txt
-+++ b/tools/clang-offload-bundler/CMakeLists.txt
-@@ -22,4 +22,4 @@ target_link_libraries(clang-offload-bundler
-   ${CLANG_OFFLOAD_BUNDLER_LIB_DEPS}
-   )
- 
--install(TARGETS clang-offload-bundler RUNTIME DESTINATION bin)
-+install(TARGETS clang-offload-bundler RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-diff --git a/tools/clang-rename/CMakeLists.txt b/tools/clang-rename/CMakeLists.txt
-index 3b3ab1540a80..9aca9ba4a2cf 100644
---- a/tools/clang-rename/CMakeLists.txt
-+++ b/tools/clang-rename/CMakeLists.txt
-@@ -18,8 +18,8 @@ target_link_libraries(clang-rename
-   )
- 
- install(PROGRAMS clang-rename.py
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-rename)
- install(PROGRAMS clang-rename.el
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-rename)
-diff --git a/tools/diagtool/CMakeLists.txt b/tools/diagtool/CMakeLists.txt
-index 96d1c390249c..41c762b37b76 100644
---- a/tools/diagtool/CMakeLists.txt
-+++ b/tools/diagtool/CMakeLists.txt
-@@ -21,7 +21,7 @@ target_link_libraries(diagtool
- if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-   install(TARGETS diagtool
-     COMPONENT diagtool
--    RUNTIME DESTINATION bin)
-+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
- 
-   if (NOT CMAKE_CONFIGURATION_TYPES)
-     add_llvm_install_targets(install-diagtool
-diff --git a/tools/libclang/CMakeLists.txt b/tools/libclang/CMakeLists.txt
-index e539c8308e75..4e1fbccea35d 100644
---- a/tools/libclang/CMakeLists.txt
-+++ b/tools/libclang/CMakeLists.txt
-@@ -130,7 +130,7 @@ endif()
- if(INTERNAL_INSTALL_PREFIX)
-   set(LIBCLANG_HEADERS_INSTALL_DESTINATION "${INTERNAL_INSTALL_PREFIX}/include")
- else()
--  set(LIBCLANG_HEADERS_INSTALL_DESTINATION include)
-+  set(LIBCLANG_HEADERS_INSTALL_DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
- endif()
- 
- install(DIRECTORY ../../include/clang-c
-diff --git a/tools/scan-build/CMakeLists.txt b/tools/scan-build/CMakeLists.txt
-index 380379300b09..adfd58ed5f7d 100644
---- a/tools/scan-build/CMakeLists.txt
-+++ b/tools/scan-build/CMakeLists.txt
-@@ -41,7 +41,7 @@ if(CLANG_INSTALL_SCANBUILD)
-                          ${CMAKE_BINARY_DIR}/bin/
-                        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/bin/${BinFile})
-     list(APPEND Depends ${CMAKE_BINARY_DIR}/bin/${BinFile})
--    install(PROGRAMS bin/${BinFile} DESTINATION bin)
-+    install(PROGRAMS bin/${BinFile} DESTINATION ${CMAKE_INSTALL_BINDIR})
-   endforeach()
- 
-   foreach(LibexecFile ${LibexecFiles})
-@@ -53,7 +53,7 @@ if(CLANG_INSTALL_SCANBUILD)
-                          ${CMAKE_BINARY_DIR}/libexec/
-                        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/libexec/${LibexecFile})
-     list(APPEND Depends ${CMAKE_BINARY_DIR}/libexec/${LibexecFile})
--    install(PROGRAMS libexec/${LibexecFile} DESTINATION libexec)
-+    install(PROGRAMS libexec/${LibexecFile} DESTINATION ${CMAKE_INSTALL_LIBEXECDIR})
-   endforeach()
- 
-   foreach(ManPage ${ManPages})
-@@ -77,7 +77,7 @@ if(CLANG_INSTALL_SCANBUILD)
-                          ${CMAKE_BINARY_DIR}/share/scan-build/
-                        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/share/scan-build/${ShareFile})
-     list(APPEND Depends ${CMAKE_BINARY_DIR}/share/scan-build/${ShareFile})
--    install(FILES share/scan-build/${ShareFile} DESTINATION share/scan-build)
-+    install(FILES share/scan-build/${ShareFile} DESTINATION ${CMAKE_INSTALL_DATADIR}/scan-build)
-   endforeach()
- 
-   add_custom_target(scan-build ALL DEPENDS ${Depends})
-diff --git a/tools/scan-view/CMakeLists.txt b/tools/scan-view/CMakeLists.txt
-index b305ca562a72..554bcb379061 100644
---- a/tools/scan-view/CMakeLists.txt
-+++ b/tools/scan-view/CMakeLists.txt
-@@ -21,7 +21,7 @@ if(CLANG_INSTALL_SCANVIEW)
-                          ${CMAKE_BINARY_DIR}/bin/
-                        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/bin/${BinFile})
-     list(APPEND Depends ${CMAKE_BINARY_DIR}/bin/${BinFile})
--    install(PROGRAMS bin/${BinFile} DESTINATION bin)
-+    install(PROGRAMS bin/${BinFile} DESTINATION ${CMAKE_INSTALL_BINDIR})
-   endforeach()
- 
-   foreach(ShareFile ${ShareFiles})
-@@ -33,7 +33,7 @@ if(CLANG_INSTALL_SCANVIEW)
-                          ${CMAKE_BINARY_DIR}/share/scan-view/
-                        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/share/${ShareFile})
-     list(APPEND Depends ${CMAKE_BINARY_DIR}/share/scan-view/${ShareFile})
--    install(FILES share/${ShareFile} DESTINATION share/scan-view)
-+    install(FILES share/${ShareFile} DESTINATION ${CMAKE_INSTALL_DATADIR}/scan-view)
-   endforeach()
- 
-   add_custom_target(scan-view ALL DEPENDS ${Depends})
-diff --git a/utils/hmaptool/CMakeLists.txt b/utils/hmaptool/CMakeLists.txt
-index 5573009d343a..24b3a90f233f 100644
---- a/utils/hmaptool/CMakeLists.txt
-+++ b/utils/hmaptool/CMakeLists.txt
-@@ -9,7 +9,7 @@ add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin/${CLANG_HM
-                    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${CLANG_HMAPTOOL})
- 
- list(APPEND Depends ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin/${CLANG_HMAPTOOL})
--install(PROGRAMS ${CLANG_HMAPTOOL} DESTINATION bin)
-+install(PROGRAMS ${CLANG_HMAPTOOL} DESTINATION ${CMAKE_INSTALL_BINDIR})
- 
- add_custom_target(hmaptool ALL DEPENDS ${Depends})
- set_target_properties(hmaptool PROPERTIES FOLDER "Utils")
diff --git a/pkgs/development/compilers/llvm/7/clang/unwindlib.patch b/pkgs/development/compilers/llvm/7/clang/unwindlib.patch
deleted file mode 100644
index 59a092d7c706..000000000000
--- a/pkgs/development/compilers/llvm/7/clang/unwindlib.patch
+++ /dev/null
@@ -1,227 +0,0 @@
-commit a5cacb5ba7f1f18e7bb6f6709e42683eeb7e6470
-Author: Sterling Augustine <saugustine@google.com>
-Date:   Tue Mar 19 20:01:59 2019 +0000
-
-    Add --unwindlib=[libgcc|compiler-rt] to parallel --rtlib= [take 2]
-    
-    "clang++ hello.cc --rtlib=compiler-rt"
-    
-    now can works without specifying additional unwind or exception
-    handling libraries.
-    
-    This reworked version of the feature no longer modifies today's default
-    unwind library for compiler-rt: which is nothing. Rather, a user
-    can specify -DCLANG_DEFAULT_UNWINDLIB=libunwind when configuring
-    the compiler.
-    
-    This should address the issues from the previous version.
-    
-    Update tests for new --unwindlib semantics.
-    
-    Differential Revision: https://reviews.llvm.org/D59109
-    
-    llvm-svn: 356508
-
-diff --git clang/CMakeLists.txt clang/CMakeLists.txt
-index 52b881939499..2c3fb62f6e73 100644
---- clang/CMakeLists.txt
-+++ clang/CMakeLists.txt
-@@ -244,6 +244,24 @@ if (NOT(CLANG_DEFAULT_RTLIB STREQUAL "" OR
-     "Default runtime library to use (\"libgcc\" or \"compiler-rt\", empty for platform default)" FORCE)
- endif()
- 
-+set(CLANG_DEFAULT_UNWINDLIB "" CACHE STRING
-+  "Default unwind library to use (\"none\" \"libgcc\" or \"libunwind\", empty to match runtime library.)")
-+if (CLANG_DEFAULT_UNWINDLIB STREQUAL "")
-+  if (CLANG_DEFAULT_RTLIB STREQUAL "libgcc")
-+    set (CLANG_DEFAULT_UNWINDLIB "libgcc" CACHE STRING "" FORCE)
-+  elseif (CLANG_DEFAULT_RTLIBS STREQUAL "libunwind")
-+    set (CLANG_DEFAULT_UNWINDLIB "none" CACHE STRING "" FORCE)
-+  endif()
-+endif()
-+
-+if (NOT(CLANG_DEFAULT_UNWINDLIB STREQUAL "none" OR
-+        CLANG_DEFAULT_UNWINDLIB STREQUAL "libgcc" OR
-+        CLANG_DEFAULT_UNWINDLIB STREQUAL "libunwind"))
-+  message(WARNING "Resetting default unwindlib to use platform default")
-+  set(CLANG_DEFAULT_UNWINDLIB "" CACHE STRING
-+    "Default unwind library to use (\"none\" \"libgcc\" or \"libunwind\", empty for none)" FORCE)
-+endif()
-+
- set(CLANG_DEFAULT_OBJCOPY "objcopy" CACHE STRING
-   "Default objcopy executable to use.")
- 
-diff --git clang/include/clang/Basic/DiagnosticDriverKinds.td clang/include/clang/Basic/DiagnosticDriverKinds.td
-index 7f75f45c6578..7e1bb33b5cef 100644
---- clang/include/clang/Basic/DiagnosticDriverKinds.td
-+++ clang/include/clang/Basic/DiagnosticDriverKinds.td
-@@ -52,6 +52,10 @@ def err_drv_invalid_rtlib_name : Error<
-   "invalid runtime library name in argument '%0'">;
- def err_drv_unsupported_rtlib_for_platform : Error<
-   "unsupported runtime library '%0' for platform '%1'">;
-+def err_drv_invalid_unwindlib_name : Error<
-+  "invalid unwind library name in argument '%0'">;
-+def err_drv_incompatible_unwindlib : Error<
-+  "--rtlib=libgcc requires --unwindlib=libgcc">;
- def err_drv_invalid_stdlib_name : Error<
-   "invalid library name in argument '%0'">;
- def err_drv_invalid_output_with_multiple_archs : Error<
-diff --git clang/include/clang/Config/config.h.cmake clang/include/clang/Config/config.h.cmake
-index 1d624450b9d9..2d4cb747e87e 100644
---- clang/include/clang/Config/config.h.cmake
-+++ clang/include/clang/Config/config.h.cmake
-@@ -23,6 +23,9 @@
- /* Default runtime library to use. */
- #define CLANG_DEFAULT_RTLIB "${CLANG_DEFAULT_RTLIB}"
- 
-+/* Default unwind library to use. */
-+#define CLANG_DEFAULT_UNWINDLIB "${CLANG_DEFAULT_UNWINDLIB}"
-+
- /* Default objcopy to use */
- #define CLANG_DEFAULT_OBJCOPY "${CLANG_DEFAULT_OBJCOPY}"
- 
-diff --git clang/include/clang/Driver/Options.td clang/include/clang/Driver/Options.td
-index 601aa8744967..0e74a2d36dea 100644
---- clang/include/clang/Driver/Options.td
-+++ clang/include/clang/Driver/Options.td
-@@ -2428,6 +2428,8 @@ def std_EQ : Joined<["-", "--"], "std=">, Flags<[CC1Option]>,
-   }]>;
- def stdlib_EQ : Joined<["-", "--"], "stdlib=">, Flags<[CC1Option]>,
-   HelpText<"C++ standard library to use">, Values<"libc++,libstdc++,platform">;
-+def unwindlib_EQ : Joined<["-", "--"], "unwindlib=">, Flags<[CC1Option]>,
-+  HelpText<"Unwind library to use">, Values<"libgcc,unwindlib,platform">;
- def sub__library : JoinedOrSeparate<["-"], "sub_library">;
- def sub__umbrella : JoinedOrSeparate<["-"], "sub_umbrella">;
- def system_header_prefix : Joined<["--"], "system-header-prefix=">,
-diff --git clang/include/clang/Driver/ToolChain.h clang/include/clang/Driver/ToolChain.h
-index 2f9c2c190e32..d5b131bcf112 100644
---- clang/include/clang/Driver/ToolChain.h
-+++ clang/include/clang/Driver/ToolChain.h
-@@ -99,6 +99,12 @@ public:
-     RLT_Libgcc
-   };
- 
-+  enum UnwindLibType {
-+    UNW_None,
-+    UNW_CompilerRT,
-+    UNW_Libgcc
-+  };
-+
-   enum RTTIMode {
-     RM_Enabled,
-     RM_Disabled,
-@@ -352,6 +358,10 @@ public:
-     return ToolChain::CST_Libstdcxx;
-   }
- 
-+  virtual UnwindLibType GetDefaultUnwindLibType() const {
-+    return ToolChain::UNW_None;
-+  }
-+
-   virtual std::string getCompilerRTPath() const;
- 
-   virtual std::string getCompilerRT(const llvm::opt::ArgList &Args,
-@@ -484,6 +494,10 @@ public:
-   // given compilation arguments.
-   virtual CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const;
- 
-+  // GetUnwindLibType - Determine the unwind library type to use with the
-+  // given compilation arguments.
-+  virtual UnwindLibType GetUnwindLibType(const llvm::opt::ArgList &Args) const;
-+
-   /// AddClangCXXStdlibIncludeArgs - Add the clang -cc1 level arguments to set
-   /// the include paths to use for the given C++ standard library type.
-   virtual void
-diff --git clang/lib/Driver/ToolChain.cpp clang/lib/Driver/ToolChain.cpp
-index cf3db34688df..d980dd5d23fb 100644
---- clang/lib/Driver/ToolChain.cpp
-+++ clang/lib/Driver/ToolChain.cpp
-@@ -665,6 +665,33 @@ ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
-   return GetDefaultRuntimeLibType();
- }
- 
-+ToolChain::UnwindLibType ToolChain::GetUnwindLibType(
-+    const ArgList &Args) const {
-+  const Arg *A = Args.getLastArg(options::OPT_unwindlib_EQ);
-+  StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_UNWINDLIB;
-+
-+  if (LibName == "none")
-+    return ToolChain::UNW_None;
-+  else if (LibName == "platform" || LibName == "") {
-+    ToolChain::RuntimeLibType RtLibType = GetRuntimeLibType(Args);
-+    if (RtLibType == ToolChain::RLT_CompilerRT)
-+      return ToolChain::UNW_None;
-+    else if (RtLibType == ToolChain::RLT_Libgcc)
-+      return ToolChain::UNW_Libgcc;
-+  } else if (LibName == "libunwind") {
-+    if (GetRuntimeLibType(Args) == RLT_Libgcc)
-+      getDriver().Diag(diag::err_drv_incompatible_unwindlib);
-+    return ToolChain::UNW_CompilerRT;
-+  } else if (LibName == "libgcc")
-+    return ToolChain::UNW_Libgcc;
-+
-+  if (A)
-+    getDriver().Diag(diag::err_drv_invalid_unwindlib_name)
-+        << A->getAsString(Args);
-+
-+  return GetDefaultUnwindLibType();
-+}
-+
- ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
-   const Arg *A = Args.getLastArg(options::OPT_stdlib_EQ);
-   StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_CXX_STDLIB;
-diff --git clang/test/Driver/compiler-rt-unwind.c clang/test/Driver/compiler-rt-unwind.c
-new file mode 100644
-index 000000000000..00024dfa7ed3
---- /dev/null
-+++ clang/test/Driver/compiler-rt-unwind.c
-@@ -0,0 +1,49 @@
-+// General tests that the driver handles combinations of --rtlib=XXX and
-+// --unwindlib=XXX properly.
-+//
-+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-+// RUN:     --target=x86_64-unknown-linux \
-+// RUN:     --gcc-toolchain="" \
-+// RUN:   | FileCheck --check-prefix=RTLIB-EMPTY %s
-+// RTLIB-EMPTY: "{{.*}}lgcc"
-+// RTLIB-EMPTY: "{{.*}}-lgcc_s"
-+//
-+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-+// RUN:     --target=x86_64-unknown-linux -rtlib=libgcc \
-+// RUN:     --gcc-toolchain="" \
-+// RUN:   | FileCheck --check-prefix=RTLIB-GCC %s
-+// RTLIB-GCC: "{{.*}}lgcc"
-+// RTLIB-GCC: "{{.*}}lgcc_s"
-+//
-+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-+// RUN:     --target=x86_64-unknown-linux -rtlib=libgcc --unwindlib=libunwind \
-+// RUN:     --gcc-toolchain="" \
-+// RUN:   | FileCheck --check-prefix=RTLIB-GCC-UNWINDLIB-COMPILER-RT %s
-+// RTLIB-GCC-UNWINDLIB-COMPILER-RT: "{{.*}}lgcc"
-+// RTLIB-GCC-UNWINDLIB-COMPILER-RT: "{{.*}}lunwind"
-+//
-+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1   \
-+// RUN:     --target=x86_64-unknown-linux -rtlib=compiler-rt \
-+// RUN:     --gcc-toolchain="" \
-+// RUN:   | FileCheck --check-prefix=RTLIB-COMPILER-RT %s
-+// RTLIB-COMPILER-RT: "{{.*}}libclang_rt.builtins-x86_64.a"
-+//
-+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1   \
-+// RUN:     --target=x86_64-unknown-linux -rtlib=compiler-rt --unwindlib=libgcc \
-+// RUN:     --gcc-toolchain="" \
-+// RUN:   | FileCheck --check-prefix=RTLIB-COMPILER-RT-UNWINDLIB-GCC %s
-+// RTLIB-COMPILER-RT-UNWINDLIB-GCC: "{{.*}}libclang_rt.builtins-x86_64.a"
-+// RTLIB-COMPILER-RT-UNWINDLIB-GCC: "{{.*}}lgcc_s"
-+//
-+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1              \
-+// RUN:     --target=x86_64-unknown-linux -rtlib=compiler-rt --unwindlib=libgcc \
-+// RUN:     -static --gcc-toolchain="" \
-+// RUN:   | FileCheck --check-prefix=RTLIB-COMPILER-RT-UNWINDLIB-GCC-STATIC %s
-+// RTLIB-COMPILER-RT-UNWINDLIB-GCC-STATIC: "{{.*}}libclang_rt.builtins-x86_64.a"
-+// RTLIB-COMPILER-RT-UNWINDLIB-GCC-STATIC: "{{.*}}lgcc_eh"
-+//
-+// RUN: not %clang -no-canonical-prefixes %s -o %t.o 2> %t.err              \
-+// RUN:     --target=x86_64-unknown-linux -rtlib=libgcc --unwindlib=libunwind \
-+// RUN:     --gcc-toolchain="" \
-+// RUN: FileCheck --input-file=%t.err --check-prefix=RTLIB-GCC-UNWINDLIB-COMPILER_RT %s
-+// RTLIB-GCC-UNWINDLIB-COMPILER_RT: "{{[.|\\\n]*}}--rtlib=libgcc requires --unwindlib=libgcc"
diff --git a/pkgs/development/compilers/llvm/7/compiler-rt/armv7l.patch b/pkgs/development/compilers/llvm/7/compiler-rt/armv7l.patch
deleted file mode 100644
index 89d7f1aec918..000000000000
--- a/pkgs/development/compilers/llvm/7/compiler-rt/armv7l.patch
+++ /dev/null
@@ -1,38 +0,0 @@
-diff -ur compiler-rt-7.1.0.src/cmake/builtin-config-ix.cmake compiler-rt-7.1.0.src-patched/cmake/builtin-config-ix.cmake
---- compiler-rt-7.1.0.src/cmake/builtin-config-ix.cmake	2018-05-25 06:36:27.000000000 +0900
-+++ compiler-rt-7.1.0.src-patched/cmake/builtin-config-ix.cmake	2020-05-09 20:26:33.030608692 +0900
-@@ -24,7 +24,7 @@
- 
- 
- set(ARM64 aarch64)
--set(ARM32 arm armhf armv6m armv7m armv7em armv7 armv7s armv7k)
-+set(ARM32 arm armhf armv6m armv7m armv7em armv7 armv7s armv7k armv7l)
- set(HEXAGON hexagon)
- set(X86 i386)
- set(X86_64 x86_64)
-diff -ur compiler-rt-7.1.0.src/lib/builtins/CMakeLists.txt compiler-rt-7.1.0.src-patched/lib/builtins/CMakeLists.txt
---- compiler-rt-7.1.0.src/lib/builtins/CMakeLists.txt	2018-07-31 03:18:59.000000000 +0900
-+++ compiler-rt-7.1.0.src-patched/lib/builtins/CMakeLists.txt	2020-05-09 20:27:38.893409318 +0900
-@@ -453,6 +453,7 @@
- set(armv7_SOURCES ${arm_SOURCES})
- set(armv7s_SOURCES ${arm_SOURCES})
- set(armv7k_SOURCES ${arm_SOURCES})
-+set(armv7l_SOURCES ${arm_SOURCES})
- set(arm64_SOURCES ${aarch64_SOURCES})
- 
- # macho_embedded archs
-@@ -563,12 +564,12 @@
-       set(_arch ${arch})
-       if("${arch}" STREQUAL "armv6m")
-         set(_arch "arm|armv6m")
--      elseif("${arch}" MATCHES "^(armhf|armv7|armv7s|armv7k|armv7m|armv7em)$")
-+      elseif("${arch}" MATCHES "^(armhf|armv7|armv7s|armv7k|armv7l|armv7m|armv7em)$")
-         set(_arch "arm")
-       endif()
- 
-       # For ARM archs, exclude any VFP builtins if VFP is not supported
--      if (${arch} MATCHES "^(arm|armhf|armv7|armv7s|armv7k|armv7m|armv7em)$")
-+      if (${arch} MATCHES "^(arm|armhf|armv7|armv7s|armv7k|armv7l|armv7m|armv7em)$")
-         string(REPLACE ";" " " _TARGET_${arch}_CFLAGS "${TARGET_${arch}_CFLAGS}")
-         check_compile_definition(__VFP_FP__ "${CMAKE_C_FLAGS} ${_TARGET_${arch}_CFLAGS}" COMPILER_RT_HAS_${arch}_VFP)
-         if(NOT COMPILER_RT_HAS_${arch}_VFP)
diff --git a/pkgs/development/compilers/llvm/7/compiler-rt/crtbegin-and-end.patch b/pkgs/development/compilers/llvm/7/compiler-rt/crtbegin-and-end.patch
deleted file mode 100644
index e63be181f95c..000000000000
--- a/pkgs/development/compilers/llvm/7/compiler-rt/crtbegin-and-end.patch
+++ /dev/null
@@ -1,595 +0,0 @@
-Get crtbegin and crtend without compiler GCC! PR is at https://reviews.llvm.org/D28791
-
-Index: compiler-rt/CMakeLists.txt
-===================================================================
---- compiler-rt/CMakeLists.txt
-+++ compiler-rt/CMakeLists.txt
-@@ -29,6 +29,8 @@
- 
- option(COMPILER_RT_BUILD_BUILTINS "Build builtins" ON)
- mark_as_advanced(COMPILER_RT_BUILD_BUILTINS)
-+option(COMPILER_RT_BUILD_CRT "Build crtbegin.o/crtend.o" ON)
-+mark_as_advanced(COMPILER_RT_BUILD_CRT)
- option(COMPILER_RT_BUILD_SANITIZERS "Build sanitizers" ON)
- mark_as_advanced(COMPILER_RT_BUILD_SANITIZERS)
- option(COMPILER_RT_BUILD_XRAY "Build xray" ON)
-Index: compiler-rt/cmake/Modules/AddCompilerRT.cmake
-===================================================================
---- compiler-rt/cmake/Modules/AddCompilerRT.cmake
-+++ compiler-rt/cmake/Modules/AddCompilerRT.cmake
-@@ -132,7 +132,7 @@
- # Adds static or shared runtime for a list of architectures and operating
- # systems and puts it in the proper directory in the build and install trees.
- # add_compiler_rt_runtime(<name>
--#                         {STATIC|SHARED}
-+#                         {OBJECT|STATIC|SHARED}
- #                         ARCHS <architectures>
- #                         OS <os list>
- #                         SOURCES <source files>
-@@ -144,8 +144,8 @@
- #                         PARENT_TARGET <convenience parent target>
- #                         ADDITIONAL_HEADERS <header files>)
- function(add_compiler_rt_runtime name type)
--  if(NOT type MATCHES "^(STATIC|SHARED)$")
--    message(FATAL_ERROR "type argument must be STATIC or SHARED")
-+  if(NOT type MATCHES "^(OBJECT|STATIC|SHARED)$")
-+    message(FATAL_ERROR "type argument must be OBJECT, STATIC or SHARED")
-     return()
-   endif()
-   cmake_parse_arguments(LIB
-@@ -204,7 +204,10 @@
-         message(FATAL_ERROR "Architecture ${arch} can't be targeted")
-         return()
-       endif()
--      if(type STREQUAL "STATIC")
-+      if(type STREQUAL "OBJECT")
-+        set(libname "${name}-${arch}")
-+        set(output_name_${libname} ${libname}${COMPILER_RT_OS_SUFFIX})
-+      elseif(type STREQUAL "STATIC")
-         set(libname "${name}-${arch}")
-         set_output_name(output_name_${libname} ${name} ${arch})
-       else()
-@@ -270,12 +273,34 @@
-       set(COMPONENT_OPTION COMPONENT ${libname})
-     endif()
- 
--    add_library(${libname} ${type} ${sources_${libname}})
--    set_target_compile_flags(${libname} ${extra_cflags_${libname}})
--    set_target_link_flags(${libname} ${extra_link_flags_${libname}})
--    set_property(TARGET ${libname} APPEND PROPERTY
--                COMPILE_DEFINITIONS ${LIB_DEFS})
--    set_target_output_directories(${libname} ${output_dir_${libname}})
-+    if(type STREQUAL "OBJECT")
-+      string(TOUPPER ${CMAKE_BUILD_TYPE} config)
-+      get_property(cflags SOURCE ${sources_${libname}} PROPERTY COMPILE_FLAGS)
-+      separate_arguments(cflags)
-+      add_custom_command(
-+          OUTPUT ${output_dir_${libname}}/${libname}.o
-+          COMMAND ${CMAKE_C_COMPILER} ${sources_${libname}} ${cflags} ${extra_cflags_${libname}} -c -o ${output_dir_${libname}}/${libname}.o
-+          DEPENDS ${sources_${libname}}
-+          COMMENT "Building C object ${libname}.o")
-+      add_custom_target(${libname} DEPENDS ${output_dir_${libname}}/${libname}.o)
-+      install(FILES ${output_dir_${libname}}/${libname}.o
-+        DESTINATION ${install_dir_${libname}}
-+        ${COMPONENT_OPTION})
-+    else()
-+      add_library(${libname} ${type} ${sources_${libname}})
-+      set_target_compile_flags(${libname} ${extra_cflags_${libname}})
-+      set_target_link_flags(${libname} ${extra_link_flags_${libname}})
-+      set_property(TARGET ${libname} APPEND PROPERTY
-+                   COMPILE_DEFINITIONS ${LIB_DEFS})
-+      set_target_output_directories(${libname} ${output_dir_${libname}})
-+      install(TARGETS ${libname}
-+        ARCHIVE DESTINATION ${install_dir_${libname}}
-+                ${COMPONENT_OPTION}
-+        LIBRARY DESTINATION ${install_dir_${libname}}
-+                ${COMPONENT_OPTION}
-+        RUNTIME DESTINATION ${install_dir_${libname}}
-+                ${COMPONENT_OPTION})
-+    endif()
-     set_target_properties(${libname} PROPERTIES
-         OUTPUT_NAME ${output_name_${libname}})
-     set_target_properties(${libname} PROPERTIES FOLDER "Compiler-RT Runtime")
-@@ -299,13 +324,6 @@
-         )
-       endif()
-     endif()
--    install(TARGETS ${libname}
--      ARCHIVE DESTINATION ${install_dir_${libname}}
--              ${COMPONENT_OPTION}
--      LIBRARY DESTINATION ${install_dir_${libname}}
--              ${COMPONENT_OPTION}
--      RUNTIME DESTINATION ${install_dir_${libname}}
--              ${COMPONENT_OPTION})
- 
-     # We only want to generate per-library install targets if you aren't using
-     # an IDE because the extra targets get cluttered in IDEs.
-Index: compiler-rt/cmake/config-ix.cmake
-===================================================================
---- compiler-rt/cmake/config-ix.cmake
-+++ compiler-rt/cmake/config-ix.cmake
-@@ -227,6 +227,7 @@
-     ${ARM32} ${ARM64} ${MIPS32} ${MIPS64} ${S390X})
- set(ALL_ASAN_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64}
-     ${MIPS32} ${MIPS64} ${PPC64} ${S390X})
-+set(ALL_CRT_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64})
- set(ALL_DFSAN_SUPPORTED_ARCH ${X86_64} ${MIPS64} ${ARM64})
- set(ALL_FUZZER_SUPPORTED_ARCH ${X86_64} ${ARM64})
- 
-@@ -474,6 +475,7 @@
-     SANITIZER_COMMON_SUPPORTED_ARCH)
- 
- else()
-+  filter_available_targets(CRT_SUPPORTED_ARCH ${ALL_CRT_SUPPORTED_ARCH})
-   # Architectures supported by compiler-rt libraries.
-   filter_available_targets(SANITIZER_COMMON_SUPPORTED_ARCH
-     ${ALL_SANITIZER_COMMON_SUPPORTED_ARCH})
-@@ -563,6 +565,12 @@
- 
- # TODO: Add builtins support.
- 
-+if (CRT_SUPPORTED_ARCH AND OS_NAME MATCHES "Linux")
-+  set(COMPILER_RT_HAS_CRT TRUE)
-+else()
-+  set(COMPILER_RT_HAS_CRT FALSE)
-+endif()
-+
- if (COMPILER_RT_HAS_SANITIZER_COMMON AND DFSAN_SUPPORTED_ARCH AND
-     OS_NAME MATCHES "Linux")
-   set(COMPILER_RT_HAS_DFSAN TRUE)
-Index: compiler-rt/lib/CMakeLists.txt
-===================================================================
---- compiler-rt/lib/CMakeLists.txt
-+++ compiler-rt/lib/CMakeLists.txt
-@@ -17,6 +17,10 @@
-   add_subdirectory(builtins)
- endif()
- 
-+if(COMPILER_RT_BUILD_CRT)
-+  add_subdirectory(crt)
-+endif()
-+
- function(compiler_rt_build_runtime runtime)
-   string(TOUPPER ${runtime} runtime_uppercase)
-   if(COMPILER_RT_HAS_${runtime_uppercase})
-Index: compiler-rt/lib/crt/CMakeLists.txt
-===================================================================
---- /dev/null
-+++ compiler-rt/lib/crt/CMakeLists.txt
-@@ -0,0 +1,102 @@
-+add_compiler_rt_component(crt)
-+
-+function(check_cxx_section_exists section output)
-+  cmake_parse_arguments(ARG "" "" "SOURCE;FLAGS" ${ARGN})
-+  if(NOT ARG_SOURCE)
-+    set(ARG_SOURCE "int main() { return 0; }\n")
-+  endif()
-+
-+  string(RANDOM TARGET_NAME)
-+  set(TARGET_NAME "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/cmTC_${TARGET_NAME}.dir")
-+  file(MAKE_DIRECTORY ${TARGET_NAME})
-+
-+  file(WRITE "${TARGET_NAME}/CheckSectionExists.c" "${ARG_SOURCE}\n")
-+
-+  string(REGEX MATCHALL "<[A-Za-z0-9_]*>" substitutions
-+         ${CMAKE_C_COMPILE_OBJECT})
-+
-+  set(try_compile_flags "${ARG_FLAGS}")
-+  if(CMAKE_C_COMPILER_ID MATCHES Clang AND CMAKE_C_COMPILER_TARGET)
-+    list(APPEND try_compile_flags "-target ${CMAKE_C_COMPILER_TARGET}")
-+  endif()
-+
-+  string(REPLACE ";" " " extra_flags "${try_compile_flags}")
-+
-+  set(test_compile_command "${CMAKE_C_COMPILE_OBJECT}")
-+  foreach(substitution ${substitutions})
-+    if(substitution STREQUAL "<CMAKE_C_COMPILER>")
-+      string(REPLACE "<CMAKE_C_COMPILER>"
-+             "${CMAKE_C_COMPILER}" test_compile_command ${test_compile_command})
-+    elseif(substitution STREQUAL "<OBJECT>")
-+      string(REPLACE "<OBJECT>" "${TARGET_NAME}/CheckSectionExists.o"
-+             test_compile_command ${test_compile_command})
-+    elseif(substitution STREQUAL "<SOURCE>")
-+      string(REPLACE "<SOURCE>" "${TARGET_NAME}/CheckSectionExists.c"
-+             test_compile_command ${test_compile_command})
-+    elseif(substitution STREQUAL "<FLAGS>")
-+      string(REPLACE "<FLAGS>" "${CMAKE_C_FLAGS} ${extra_flags}"
-+             test_compile_command ${test_compile_command})
-+    else()
-+      string(REPLACE "${substitution}" "" test_compile_command
-+             ${test_compile_command})
-+    endif()
-+  endforeach()
-+
-+  string(REPLACE " " ";" test_compile_command "${test_compile_command}")
-+
-+  execute_process(
-+    COMMAND ${test_compile_command}
-+    RESULT_VARIABLE TEST_RESULT
-+    OUTPUT_VARIABLE TEST_OUTPUT
-+    ERROR_VARIABLE TEST_ERROR
-+  )
-+
-+  execute_process(
-+    COMMAND ${CMAKE_OBJDUMP} -h "${TARGET_NAME}/CheckSectionExists.o"
-+    RESULT_VARIABLE CHECK_RESULT
-+    OUTPUT_VARIABLE CHECK_OUTPUT
-+    ERROR_VARIABLE CHECK_ERROR
-+  )
-+  string(FIND "${CHECK_OUTPUT}" "${section}" SECTION_FOUND)
-+
-+  if(NOT SECTION_FOUND EQUAL -1)
-+    set(${output} TRUE PARENT_SCOPE)
-+  else()
-+    set(${output} FALSE PARENT_SCOPE)
-+  endif()
-+
-+  file(REMOVE_RECURSE ${TARGET_NAME})
-+endfunction()
-+
-+check_cxx_section_exists(".init_array" COMPILER_RT_HAS_INITFINI_ARRAY
-+  SOURCE "__attribute__((constructor)) void f() {}\nint main() { return 0; }\n")
-+
-+append_list_if(COMPILER_RT_HAS_INITFINI_ARRAY -DCRT_HAS_INITFINI_ARRAY CRT_CFLAGS)
-+append_list_if(COMPILER_RT_HAS_FPIC_FLAG -fPIC CRT_CFLAGS)
-+
-+foreach(arch ${CRT_SUPPORTED_ARCH})
-+  add_compiler_rt_runtime(clang_rt.crtbegin
-+    OBJECT
-+    ARCHS ${arch}
-+    SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/crtbegin.c
-+    CFLAGS ${CRT_CFLAGS}
-+    PARENT_TARGET crt)
-+  add_compiler_rt_runtime(clang_rt.crtbegin_shared
-+    OBJECT
-+    ARCHS ${arch}
-+    SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/crtbegin.c
-+    CFLAGS ${CRT_CFLAGS} -DCRT_SHARED
-+    PARENT_TARGET crt)
-+  add_compiler_rt_runtime(clang_rt.crtend
-+    OBJECT
-+    ARCHS ${arch}
-+    SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/crtend.c
-+    CFLAGS ${CRT_CFLAGS}
-+    PARENT_TARGET crt)
-+  add_compiler_rt_runtime(clang_rt.crtend_shared
-+    OBJECT
-+    ARCHS ${arch}
-+    SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/crtend.c
-+    CFLAGS ${CRT_CFLAGS} -DCRT_SHARED
-+    PARENT_TARGET crt)
-+endforeach()
-Index: compiler-rt/lib/crt/crtbegin.c
-===================================================================
---- /dev/null
-+++ compiler-rt/lib/crt/crtbegin.c
-@@ -0,0 +1,108 @@
-+/* ===-- crtbegin.c - Start of constructors and destructors ----------------===
-+ *
-+ *      	       The LLVM Compiler Infrastructure
-+ *
-+ * This file is dual licensed under the MIT and the University of Illinois Open
-+ * Source Licenses. See LICENSE.TXT for details.
-+ *
-+ * ===----------------------------------------------------------------------===
-+ */
-+
-+#include <stddef.h>
-+
-+__attribute__((visibility("hidden")))
-+#ifdef CRT_SHARED
-+void *__dso_handle = &__dso_handle;
-+#else
-+void *__dso_handle = (void *)0;
-+#endif
-+
-+static long __EH_FRAME_LIST__[]
-+    __attribute__((section(".eh_frame"), aligned(sizeof(void *)))) = {};
-+
-+extern void __register_frame_info(const void *, void *) __attribute__((weak));
-+extern void *__deregister_frame_info(const void *) __attribute__((weak));
-+
-+#ifndef CRT_HAS_INITFINI_ARRAY
-+typedef void (*fp)(void);
-+
-+static fp __CTOR_LIST__[]
-+    __attribute__((section(".ctors"), aligned(sizeof(fp)), used)) = {(fp)-1};
-+extern fp __CTOR_LIST_END__[];
-+#endif
-+
-+#ifdef CRT_SHARED
-+extern void __cxa_finalize(void *) __attribute__((weak));
-+#endif
-+
-+static void __attribute__((used)) __do_init() {
-+  static _Bool __initialized;
-+  if (__builtin_expect(__initialized, 0))
-+    return;
-+  __initialized = 1;
-+
-+  static struct { void *p[8]; } __object;
-+  if (__register_frame_info)
-+    __register_frame_info(__EH_FRAME_LIST__, &__object);
-+
-+#ifndef CRT_HAS_INITFINI_ARRAY
-+  const size_t n = __CTOR_LIST_END__ - __CTOR_LIST__ - 1;
-+  for (size_t i = n; i >= 1; i--) __CTOR_LIST__[i]();
-+#endif
-+}
-+
-+#ifdef CRT_HAS_INITFINI_ARRAY
-+__attribute__((section(".init_array"),
-+               used)) static void (*__init)(void) = __do_init;
-+#else  // CRT_HAS_INITFINI_ARRAY
-+#if defined(__i386__) || defined(__x86_64__)
-+asm(".pushsection .init,\"ax\",@progbits\n\t"
-+    "call " __USER_LABEL_PREFIX__ "__do_init\n\t"
-+    ".popsection");
-+#elif defined(__arm__)
-+asm(".pushsection .init,\"ax\",%progbits\n\t"
-+    "bl " __USER_LABEL_PREFIX__ "__do_init\n\t"
-+    ".popsection");
-+#endif  // CRT_HAS_INITFINI_ARRAY
-+#endif
-+
-+#ifndef CRT_HAS_INITFINI_ARRAY
-+static fp __DTOR_LIST__[]
-+    __attribute__((section(".dtors"), aligned(sizeof(fp)), used)) = {(fp)-1};
-+extern fp __DTOR_LIST_END__[];
-+#endif
-+
-+static void __attribute__((used)) __do_fini() {
-+  static _Bool __finalized;
-+  if (__builtin_expect(__finalized, 0))
-+    return;
-+  __finalized = 1;
-+
-+#ifdef CRT_SHARED
-+  if (__cxa_finalize)
-+    __cxa_finalize(__dso_handle);
-+#endif
-+
-+#ifndef CRT_HAS_INITFINI_ARRAY
-+  if (__deregister_frame_info)
-+    __deregister_frame_info(__EH_FRAME_LIST__);
-+
-+  const size_t n = __DTOR_LIST_END__ - __DTOR_LIST__ - 1;
-+  for (size_t i = 1; i < n; i++) __DTOR_LIST__[i]();
-+#endif
-+}
-+
-+#ifdef CRT_HAS_INITFINI_ARRAY
-+__attribute__((section(".fini_array"),
-+               used)) static void (*__fini)(void) = __do_fini;
-+#else  // CRT_HAS_INITFINI_ARRAY
-+#if defined(__i386__) || defined(__x86_64__)
-+asm(".pushsection .fini,\"ax\",@progbits\n\t"
-+    "call " __USER_LABEL_PREFIX__ "__do_fini\n\t"
-+    ".popsection");
-+#elif defined(__arm__)
-+asm(".pushsection .fini,\"ax\",%progbits\n\t"
-+    "bl " __USER_LABEL_PREFIX__ "__do_fini\n\t"
-+    ".popsection");
-+#endif
-+#endif  // CRT_HAS_INIT_FINI_ARRAY
-Index: compiler-rt/lib/crt/crtend.c
-===================================================================
---- /dev/null
-+++ compiler-rt/lib/crt/crtend.c
-@@ -0,0 +1,24 @@
-+/* ===-- crtend.c - End of constructors and destructors --------------------===
-+ *
-+ *      	       The LLVM Compiler Infrastructure
-+ *
-+ * This file is dual licensed under the MIT and the University of Illinois Open
-+ * Source Licenses. See LICENSE.TXT for details.
-+ *
-+ * ===----------------------------------------------------------------------===
-+ */
-+
-+#include <stdint.h>
-+
-+// Put 4-byte zero which is the length field in FDE at the end as a terminator.
-+const int32_t __EH_FRAME_LIST_END__[]
-+    __attribute__((section(".eh_frame"), aligned(sizeof(int32_t)),
-+                   visibility("hidden"), used)) = {0};
-+
-+#ifndef CRT_HAS_INITFINI_ARRAY
-+typedef void (*fp)(void);
-+fp __CTOR_LIST_END__[]
-+    __attribute__((section(".ctors"), visibility("hidden"), used)) = {0};
-+fp __DTOR_LIST_END__[]
-+    __attribute__((section(".dtors"), visibility("hidden"), used)) = {0};
-+#endif
-Index: compiler-rt/test/CMakeLists.txt
-===================================================================
---- compiler-rt/test/CMakeLists.txt
-+++ compiler-rt/test/CMakeLists.txt
-@@ -73,6 +73,9 @@
-   if(COMPILER_RT_BUILD_XRAY)
-     compiler_rt_test_runtime(xray)
-   endif()
-+  if(COMPILER_RT_HAS_CRT)
-+    add_subdirectory(crt)
-+  endif()
-   # ShadowCallStack does not yet provide a runtime with compiler-rt, the tests
-   # include their own minimal runtime
-   add_subdirectory(shadowcallstack)
-Index: compiler-rt/test/crt/CMakeLists.txt
-===================================================================
---- /dev/null
-+++ compiler-rt/test/crt/CMakeLists.txt
-@@ -0,0 +1,31 @@
-+set(CRT_LIT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
-+
-+set(CRT_TESTSUITES)
-+
-+set(CRT_TEST_DEPS "")
-+
-+if(NOT COMPILER_RT_STANDALONE_BUILD AND COMPILER_RT_BUILD_CRT AND
-+   COMPILER_RT_HAS_CRT)
-+  list(APPEND CRT_TEST_DEPS crt)
-+endif()
-+
-+set(CRT_TEST_ARCH ${CRT_SUPPORTED_ARCH})
-+if (COMPILER_RT_BUILD_CRT AND COMPILER_RT_HAS_CRT)
-+  foreach(arch ${CRT_TEST_ARCH})
-+    set(CRT_TEST_TARGET_ARCH ${arch})
-+    string(TOLOWER "-${arch}-${OS_NAME}" CRT_TEST_CONFIG_SUFFIX)
-+    get_test_cc_for_arch(${arch} CRT_TEST_TARGET_CC CRT_TEST_TARGET_CFLAGS)
-+    string(TOUPPER ${arch} ARCH_UPPER_CASE)
-+    set(CONFIG_NAME ${ARCH_UPPER_CASE}${OS_NAME}Config)
-+
-+    configure_lit_site_cfg(
-+      ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.in
-+      ${CMAKE_CURRENT_BINARY_DIR}/${CONFIG_NAME}/lit.site.cfg)
-+    list(APPEND CRT_TESTSUITES ${CMAKE_CURRENT_BINARY_DIR}/${CONFIG_NAME})
-+  endforeach()
-+endif()
-+
-+add_lit_testsuite(check-crt "Running the CRT tests"
-+  ${CRT_TESTSUITES}
-+  DEPENDS ${CRT_TEST_DEPS})
-+set_target_properties(check-crt PROPERTIES FOLDER "Compiler-RT Misc")
-Index: compiler-rt/test/crt/dso_handle.cpp
-===================================================================
---- /dev/null
-+++ compiler-rt/test/crt/dso_handle.cpp
-@@ -0,0 +1,33 @@
-+// RUN: %clangxx -g -DCRT_SHARED -c %s -fPIC -o %tshared.o
-+// RUN: %clangxx -g -c %s -fPIC -o %t.o
-+// RUN: %clangxx -g -shared -o %t.so -nostdlib %crti %shared_crtbegin %tshared.o %libstdcxx -lc -lm -lgcc_s %shared_crtend %crtn
-+// RUN: %clangxx -g -o %t -nostdlib %crt1 %crti %crtbegin %t.o %libstdcxx -lc -lm %libgcc %t.so %crtend %crtn
-+// RUN: %run %t 2>&1 | FileCheck %s
-+
-+#include <stdio.h>
-+
-+// CHECK: 1
-+// CHECK-NEXT: ~A()
-+
-+#ifdef CRT_SHARED
-+bool G;
-+void C() {
-+  printf("%d\n", G);
-+}
-+
-+struct A {
-+  A() { G = true; }
-+  ~A() {
-+    printf("~A()\n");
-+  }
-+};
-+
-+A a;
-+#else
-+void C();
-+
-+int main() {
-+  C();
-+  return 0;
-+}
-+#endif
-Index: compiler-rt/test/crt/lit.cfg
-===================================================================
---- /dev/null
-+++ compiler-rt/test/crt/lit.cfg
-@@ -0,0 +1,80 @@
-+# -*- Python -*-
-+
-+import os
-+import subprocess
-+
-+# Setup config name.
-+config.name = 'CRT' + config.name_suffix
-+
-+# Setup source root.
-+config.test_source_root = os.path.dirname(__file__)
-+
-+
-+def get_library_path(file):
-+    cmd = subprocess.Popen([config.clang.strip(),
-+                            config.target_cflags.strip(),
-+                            '-print-file-name=%s' % file],
-+                           stdout=subprocess.PIPE,
-+                           env=config.environment)
-+    if not cmd.stdout:
-+      lit_config.fatal("Couldn't find the library path for '%s'" % file)
-+    dir = cmd.stdout.read().strip()
-+    if sys.platform in ['win32'] and execute_external:
-+        # Don't pass dosish path separator to msys bash.exe.
-+        dir = dir.replace('\\', '/')
-+    # Ensure the result is an ascii string, across Python2.5+ - Python3.
-+    return str(dir.decode('ascii'))
-+
-+
-+def get_libgcc_file_name():
-+    cmd = subprocess.Popen([config.clang.strip(),
-+                            config.target_cflags.strip(),
-+                            '-print-libgcc-file-name'],
-+                           stdout=subprocess.PIPE,
-+                           env=config.environment)
-+    if not cmd.stdout:
-+      lit_config.fatal("Couldn't find the library path for '%s'" % file)
-+    dir = cmd.stdout.read().strip()
-+    if sys.platform in ['win32'] and execute_external:
-+        # Don't pass dosish path separator to msys bash.exe.
-+        dir = dir.replace('\\', '/')
-+    # Ensure the result is an ascii string, across Python2.5+ - Python3.
-+    return str(dir.decode('ascii'))
-+
-+
-+def build_invocation(compile_flags):
-+    return ' ' + ' '.join([config.clang] + compile_flags) + ' '
-+
-+
-+# Setup substitutions.
-+config.substitutions.append(
-+    ('%clang ', build_invocation([config.target_cflags])))
-+config.substitutions.append(
-+    ('%clangxx ',
-+     build_invocation(config.cxx_mode_flags + [config.target_cflags])))
-+
-+base_lib = os.path.join(
-+    config.compiler_rt_libdir, "clang_rt.%%s-%s.o" % config.target_arch)
-+config.substitutions.append(('%crtbegin', base_lib % "crtbegin"))
-+config.substitutions.append(('%shared_crtbegin', base_lib % "crtbegin_shared"))
-+config.substitutions.append(('%crtend', base_lib % "crtend"))
-+config.substitutions.append(('%shared_crtend', base_lib % "crtend_shared"))
-+
-+config.substitutions.append(
-+    ('%crt1', get_library_path('crt1.o')))
-+config.substitutions.append(
-+    ('%crti', get_library_path('crti.o')))
-+config.substitutions.append(
-+    ('%crtn', get_library_path('crtn.o')))
-+
-+config.substitutions.append(
-+    ('%libgcc', get_libgcc_file_name()))
-+
-+config.substitutions.append(
-+    ('%libstdcxx', '-l' + config.sanitizer_cxx_lib.lstrip('lib')))
-+
-+# Default test suffixes.
-+config.suffixes = ['.c', '.cc', '.cpp']
-+
-+if config.host_os not in ['Linux']:
-+    config.unsupported = True
-Index: compiler-rt/test/crt/lit.site.cfg.in
-===================================================================
---- /dev/null
-+++ compiler-rt/test/crt/lit.site.cfg.in
-@@ -0,0 +1,14 @@
-+@LIT_SITE_CFG_IN_HEADER@
-+
-+# Tool-specific config options.
-+config.name_suffix = "@CRT_TEST_CONFIG_SUFFIX@"
-+config.crt_lit_source_dir = "@CRT_LIT_SOURCE_DIR@"
-+config.target_cflags = "@CRT_TEST_TARGET_CFLAGS@"
-+config.target_arch = "@CRT_TEST_TARGET_ARCH@"
-+config.sanitizer_cxx_lib = "@SANITIZER_TEST_CXX_LIBNAME@"
-+
-+# Load common config for all compiler-rt lit tests
-+lit_config.load_config(config, "@COMPILER_RT_BINARY_DIR@/test/lit.common.configured")
-+
-+# Load tool-specific config that would do the real work.
-+lit_config.load_config(config, "@CRT_LIT_SOURCE_DIR@/lit.cfg")
diff --git a/pkgs/development/compilers/llvm/7/compiler-rt/default.nix b/pkgs/development/compilers/llvm/7/compiler-rt/default.nix
deleted file mode 100644
index 7354397d2bf0..000000000000
--- a/pkgs/development/compilers/llvm/7/compiler-rt/default.nix
+++ /dev/null
@@ -1,117 +0,0 @@
-{ lib, stdenv, llvm_meta, version, fetch, cmake, python3, libllvm, libcxxabi
-, doFakeLibgcc ? stdenv.hostPlatform.isFreeBSD
-}:
-
-let
-
-  useLLVM = stdenv.hostPlatform.useLLVM or false;
-  bareMetal = stdenv.hostPlatform.parsed.kernel.name == "none";
-  haveLibc = stdenv.cc.libc != null;
-  inherit (stdenv.hostPlatform) isMusl;
-
-in
-
-stdenv.mkDerivation {
-  pname = "compiler-rt" + lib.optionalString (haveLibc) "-libc";
-  inherit version;
-  src = fetch "compiler-rt" "1n48p8gjarihkws0i2bay5w9bdwyxyxxbpwyng7ba58jb30dlyq5";
-
-  nativeBuildInputs = [ cmake python3 libllvm.dev ];
-  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
-
-  env.NIX_CFLAGS_COMPILE = toString [
-    "-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"
-  ];
-
-  cmakeFlags = [
-    "-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON"
-    "-DCMAKE_C_COMPILER_TARGET=${stdenv.hostPlatform.config}"
-    "-DCMAKE_ASM_COMPILER_TARGET=${stdenv.hostPlatform.config}"
-  ] ++ lib.optionals (useLLVM || bareMetal || isMusl) [
-    "-DCOMPILER_RT_BUILD_SANITIZERS=OFF"
-    "-DCOMPILER_RT_BUILD_XRAY=OFF"
-    "-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
-  ] ++ lib.optionals (useLLVM || bareMetal) [
-    "-DCOMPILER_RT_BUILD_PROFILE=OFF"
-  ] ++ lib.optionals ((useLLVM || bareMetal) && !haveLibc) [
-    "-DCMAKE_C_COMPILER_WORKS=ON"
-    "-DCMAKE_CXX_COMPILER_WORKS=ON"
-    "-DCOMPILER_RT_BAREMETAL_BUILD=ON"
-    "-DCMAKE_SIZEOF_VOID_P=${toString (stdenv.hostPlatform.parsed.cpu.bits / 8)}"
-  ] ++ lib.optionals (useLLVM) [
-    "-DCOMPILER_RT_BUILD_BUILTINS=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"
-  ] ++ lib.optionals (bareMetal) [
-    "-DCOMPILER_RT_OS_DIR=baremetal"
-  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
-    # The compiler-rt build infrastructure sniffs supported platforms on Darwin
-    # and finds i386;x86_64;x86_64h. We only build for x86_64, so linking fails
-    # when it tries to use libc++ and libc++api for i386.
-    "-DDARWIN_osx_ARCHS=${stdenv.hostPlatform.darwinArch}"
-  ];
-
-  outputs = [ "out" "dev" ];
-
-  patches = [
-    # https://github.com/llvm/llvm-project/commit/947f9692440836dcb8d88b74b69dd379d85974ce
-    ../../common/compiler-rt/glibc.patch
-    ../../common/compiler-rt/7-12-codesign.patch # Revert compiler-rt commit that makes codesign mandatory
-    ./gnu-install-dirs.patch
-    ../../common/compiler-rt/libsanitizer-no-cyclades-9.patch
-  ] ++ lib.optional (useLLVM) ./crtbegin-and-end.patch
-    ++ lib.optional stdenv.hostPlatform.isAarch32 ./armv7l.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 = lib.optionalString (!stdenv.isDarwin) ''
-    substituteInPlace cmake/builtin-config-ix.cmake \
-      --replace 'set(X86 i386)' 'set(X86 i386 i486 i586 i686)'
-  '' + lib.optionalString stdenv.isDarwin ''
-    substituteInPlace cmake/config-ix.cmake \
-      --replace 'set(COMPILER_RT_HAS_TSAN TRUE)' 'set(COMPILER_RT_HAS_TSAN FALSE)'
-  '' + lib.optionalString (useLLVM) ''
-    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>" ""
-  '';
-
-  preConfigure = lib.optionalString (useLLVM && !haveLibc) ''
-    cmakeFlagsArray+=(-DCMAKE_C_FLAGS="-nodefaultlibs -ffreestanding")
-  '';
-
-  # Hack around weird upsream RPATH bug
-  postInstall = lib.optionalString (stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isWasm) ''
-    ln -s "$out/lib"/*/* "$out/lib"
-  '' + lib.optionalString (useLLVM) ''
-    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
-  '' + lib.optionalString doFakeLibgcc ''
-    ln -s $out/lib/freebsd/libclang_rt.builtins-*.a $out/lib/libgcc.a
-  '';
-
-  meta = llvm_meta // {
-    homepage = "https://compiler-rt.llvm.org/";
-    description = "Compiler runtime libraries";
-    longDescription = ''
-      The compiler-rt project provides highly tuned implementations of the
-      low-level code generator support routines like "__fixunsdfdi" and other
-      calls generated when a target doesn't have a short sequence of native
-      instructions to implement a core IR operation. It also provides
-      implementations of run-time libraries for dynamic testing tools such as
-      AddressSanitizer, ThreadSanitizer, MemorySanitizer, and DataFlowSanitizer.
-    '';
-    # "All of the code in the compiler-rt project is dual licensed under the MIT
-    # license and the UIUC License (a BSD-like license)":
-    license = with lib.licenses; [ mit ncsa ];
-    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
-  };
-}
diff --git a/pkgs/development/compilers/llvm/7/compiler-rt/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/7/compiler-rt/gnu-install-dirs.patch
deleted file mode 100644
index 41b501ec6497..000000000000
--- a/pkgs/development/compilers/llvm/7/compiler-rt/gnu-install-dirs.patch
+++ /dev/null
@@ -1,117 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 86ca2b3ef74b..555103bd97fe 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -8,6 +8,7 @@ cmake_minimum_required(VERSION 3.4.3)
- # Check if compiler-rt is built as a standalone project.
- if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR COMPILER_RT_STANDALONE_BUILD)
-   project(CompilerRT C CXX ASM)
-+  include(GNUInstallDirs)
-   set(COMPILER_RT_STANDALONE_BUILD TRUE)
-   set_property(GLOBAL PROPERTY USE_FOLDERS ON)
- endif()
-diff --git a/cmake/Modules/AddCompilerRT.cmake b/cmake/Modules/AddCompilerRT.cmake
-index cd4c704fc824..5abcd1260381 100644
---- a/cmake/Modules/AddCompilerRT.cmake
-+++ b/cmake/Modules/AddCompilerRT.cmake
-@@ -478,7 +478,7 @@ macro(add_compiler_rt_resource_file target_name file_name component)
-   add_custom_target(${target_name} DEPENDS ${dst_file})
-   # Install in Clang resource directory.
-   install(FILES ${file_name}
--    DESTINATION ${COMPILER_RT_INSTALL_PATH}/share
-+    DESTINATION ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_DATADIR}
-     COMPONENT ${component})
-   add_dependencies(${component} ${target_name})
- 
-@@ -495,7 +495,7 @@ macro(add_compiler_rt_script name)
-   add_custom_target(${name} DEPENDS ${dst})
-   install(FILES ${dst}
-     PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE
--    DESTINATION ${COMPILER_RT_INSTALL_PATH}/bin)
-+    DESTINATION ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_BINDIR})
- endmacro(add_compiler_rt_script src name)
- 
- # Builds custom version of libc++ and installs it in <prefix>.
-diff --git a/cmake/Modules/CompilerRTDarwinUtils.cmake b/cmake/Modules/CompilerRTDarwinUtils.cmake
-index 04cc955980fa..a99f6dfb2f82 100644
---- a/cmake/Modules/CompilerRTDarwinUtils.cmake
-+++ b/cmake/Modules/CompilerRTDarwinUtils.cmake
-@@ -377,7 +377,7 @@ macro(darwin_add_embedded_builtin_libraries)
-     set(DARWIN_macho_embedded_LIBRARY_OUTPUT_DIR
-       ${COMPILER_RT_OUTPUT_DIR}/lib/macho_embedded)
-     set(DARWIN_macho_embedded_LIBRARY_INSTALL_DIR
--      ${COMPILER_RT_INSTALL_PATH}/lib/macho_embedded)
-+      ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_LIBDIR}/macho_embedded)
-       
-     set(CFLAGS_armv7 "-target thumbv7-apple-darwin-eabi")
-     set(CFLAGS_i386 "-march=pentium")
-diff --git a/cmake/Modules/CompilerRTUtils.cmake b/cmake/Modules/CompilerRTUtils.cmake
-index e5651718fa34..d95cfc984a85 100644
---- a/cmake/Modules/CompilerRTUtils.cmake
-+++ b/cmake/Modules/CompilerRTUtils.cmake
-@@ -330,7 +330,7 @@ endfunction()
- function(get_compiler_rt_install_dir arch install_dir)
-   if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
-     get_compiler_rt_target(${arch} target)
--    set(${install_dir} ${COMPILER_RT_INSTALL_PATH}/${target}/lib PARENT_SCOPE)
-+    set(${install_dir} ${COMPILER_RT_INSTALL_PATH}/${target}/${CMAKE_INSTALL_FULL_LIBDIR} PARENT_SCOPE)
-   else()
-     set(${install_dir} ${COMPILER_RT_LIBRARY_INSTALL_DIR} PARENT_SCOPE)
-   endif()
-diff --git a/cmake/base-config-ix.cmake b/cmake/base-config-ix.cmake
-index 91fe2494b476..b59a0ffc69f4 100644
---- a/cmake/base-config-ix.cmake
-+++ b/cmake/base-config-ix.cmake
-@@ -53,11 +53,11 @@ if (LLVM_TREE_AVAILABLE)
- else()
-     # Take output dir and install path from the user.
-   set(COMPILER_RT_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR} CACHE PATH
--    "Path where built compiler-rt libraries should be stored.")
-+    "Path where built compiler-rt build artifacts should be stored.")
-   set(COMPILER_RT_EXEC_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/bin CACHE PATH
-     "Path where built compiler-rt executables should be stored.")
--  set(COMPILER_RT_INSTALL_PATH ${CMAKE_INSTALL_PREFIX} CACHE PATH
--    "Path where built compiler-rt libraries should be installed.")
-+  set(COMPILER_RT_INSTALL_PATH "" CACHE PATH
-+    "Prefix where built compiler-rt artifacts should be installed, comes before CMAKE_INSTALL_PREFIX.")
-   option(COMPILER_RT_INCLUDE_TESTS "Generate and build compiler-rt unit tests." OFF)
-   option(COMPILER_RT_ENABLE_WERROR "Fail and stop if warning is triggered" OFF)
-   # Use a host compiler to compile/link tests.
-@@ -85,7 +85,7 @@ else(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR)
-   set(COMPILER_RT_LIBRARY_OUTPUT_DIR
-     ${COMPILER_RT_OUTPUT_DIR}/lib/${COMPILER_RT_OS_DIR})
-   set(COMPILER_RT_LIBRARY_INSTALL_DIR
--    ${COMPILER_RT_INSTALL_PATH}/lib/${COMPILER_RT_OS_DIR})
-+    ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_LIBDIR}/${COMPILER_RT_OS_DIR})
- endif()
- 
- if(APPLE)
-diff --git a/include/CMakeLists.txt b/include/CMakeLists.txt
-index c4b93b89a30c..3913dc3a1ee6 100644
---- a/include/CMakeLists.txt
-+++ b/include/CMakeLists.txt
-@@ -48,12 +48,12 @@ set_target_properties(compiler-rt-headers PROPERTIES FOLDER "Compiler-RT Misc")
- install(FILES ${SANITIZER_HEADERS}
-   COMPONENT compiler-rt-headers
-   PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
--  DESTINATION ${COMPILER_RT_INSTALL_PATH}/include/sanitizer)
-+  DESTINATION ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_INCLUDEDIR}/sanitizer)
- # Install xray headers.
- install(FILES ${XRAY_HEADERS}
-   COMPONENT compiler-rt-headers
-   PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
--  DESTINATION ${COMPILER_RT_INSTALL_PATH}/include/xray)
-+  DESTINATION ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_INCLUDEDIR}/xray)
- 
- if (NOT CMAKE_CONFIGURATION_TYPES) # don't add this for IDEs.
-   add_custom_target(install-compiler-rt-headers
-diff --git a/lib/dfsan/CMakeLists.txt b/lib/dfsan/CMakeLists.txt
-index b3ae713cf02c..52b364b900f5 100644
---- a/lib/dfsan/CMakeLists.txt
-+++ b/lib/dfsan/CMakeLists.txt
-@@ -54,4 +54,4 @@ add_custom_command(OUTPUT ${dfsan_abilist_filename}
-                    DEPENDS done_abilist.txt libc_ubuntu1404_abilist.txt)
- add_dependencies(dfsan dfsan_abilist)
- install(FILES ${dfsan_abilist_filename}
--        DESTINATION ${COMPILER_RT_INSTALL_PATH}/share)
-+        DESTINATION ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_DATADIR})
diff --git a/pkgs/development/compilers/llvm/7/default.nix b/pkgs/development/compilers/llvm/7/default.nix
deleted file mode 100644
index 972d52ac6e1a..000000000000
--- a/pkgs/development/compilers/llvm/7/default.nix
+++ /dev/null
@@ -1,273 +0,0 @@
-{ lowPrio, newScope, pkgs, lib, stdenv, cmake
-, preLibcCrossHeaders
-, libxml2, python3, isl, fetchurl, overrideCC, wrapCCWith, wrapBintoolsWith
-, buildLlvmTools # tools, but from the previous stage, for cross
-, targetLlvmLibraries # libraries, but from the next stage, for cross
-, targetLlvm
-# This is the default binutils, but with *this* version of LLD rather
-# than the default LLVM version's, if LLD is the choice. We use these for
-# the `useLLVM` bootstrapping below.
-, bootBintoolsNoLibc ?
-    if stdenv.targetPlatform.linker == "lld"
-    then null
-    else pkgs.bintoolsNoLibc
-, bootBintools ?
-    if stdenv.targetPlatform.linker == "lld"
-    then null
-    else pkgs.bintools
-}:
-
-let
-  release_version = "7.1.0";
-  version = release_version; # differentiating these is important for rc's
-
-  fetch = name: sha256: fetchurl {
-    url = "https://releases.llvm.org/${release_version}/${name}-${version}.src.tar.xz";
-    inherit sha256;
-  };
-
-  clang-tools-extra_src = fetch "clang-tools-extra" "0lb4kdh7j2fhfz8kd6iv5df7m3pikiryk1vvwsf87spc90n09q0w";
-
-  inherit (import ../common/common-let.nix { inherit lib release_version; }) llvm_meta;
-
-  tools = lib.makeExtensible (tools: let
-    callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
-    mkExtraBuildCommands0 = cc: ''
-      rsrc="$out/resource-root"
-      mkdir "$rsrc"
-      ln -s "${cc.lib}/lib/clang/${release_version}/include" "$rsrc"
-      echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
-    '';
-    mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
-      ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
-      ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
-    '';
-
-  bintoolsNoLibc' =
-    if bootBintoolsNoLibc == null
-    then tools.bintoolsNoLibc
-    else bootBintoolsNoLibc;
-  bintools' =
-    if bootBintools == null
-    then tools.bintools
-    else bootBintools;
-
-  in {
-
-    libllvm = callPackage ./llvm {
-      inherit llvm_meta;
-    };
-
-    # `llvm` historically had the binaries.  When choosing an output explicitly,
-    # we need to reintroduce `outputSpecified` to get the expected behavior e.g. of lib.get*
-    llvm = tools.libllvm;
-
-    libllvm-polly = callPackage ./llvm {
-      inherit llvm_meta;
-      enablePolly = true;
-    };
-
-    llvm-polly = tools.libllvm-polly.lib // { outputSpecified = false; };
-
-    libclang = callPackage ./clang {
-      inherit clang-tools-extra_src llvm_meta;
-    };
-
-    clang-unwrapped = tools.libclang;
-
-    clang-polly-unwrapped = callPackage ./clang {
-      inherit llvm_meta;
-      inherit clang-tools-extra_src;
-      libllvm = tools.libllvm-polly;
-      enablePolly = true;
-    };
-
-    llvm-manpages = lowPrio (tools.libllvm.override {
-      enableManpages = true;
-      python3 = pkgs.python3;  # don't use python-boot
-    });
-
-    clang-manpages = lowPrio (tools.libclang.override {
-      enableManpages = true;
-      python3 = pkgs.python3;  # don't use python-boot
-    });
-
-    # pick clang appropriate for package set we are targeting
-    clang =
-      /**/ if stdenv.targetPlatform.libc == null then tools.clangNoLibc
-      else if stdenv.targetPlatform.useLLVM or false then tools.clangUseLLVM
-      else if (pkgs.targetPackages.stdenv or stdenv).cc.isGNU then tools.libstdcxxClang
-      else tools.libcxxClang;
-
-    libstdcxxClang = wrapCCWith rec {
-      cc = tools.clang-unwrapped;
-      # libstdcxx is taken from gcc in an ad-hoc way in cc-wrapper.
-      libcxx = null;
-      extraPackages = [
-        targetLlvmLibraries.compiler-rt
-      ];
-      extraBuildCommands = mkExtraBuildCommands cc;
-    };
-
-    libcxxClang = wrapCCWith rec {
-      cc = tools.clang-unwrapped;
-      libcxx = targetLlvmLibraries.libcxx;
-      extraPackages = [
-        libcxx.cxxabi
-        targetLlvmLibraries.compiler-rt
-      ];
-      extraBuildCommands = mkExtraBuildCommands cc;
-    };
-
-    lld = callPackage ./lld {
-      inherit llvm_meta;
-    };
-
-    lldb = callPackage ./lldb {
-      inherit llvm_meta;
-    };
-
-    # 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-unwrapped = callPackage ../common/bintools.nix { };
-
-    bintoolsNoLibc = wrapBintoolsWith {
-      bintools = tools.bintools-unwrapped;
-      libc = preLibcCrossHeaders;
-    };
-
-    bintools = wrapBintoolsWith {
-      bintools = tools.bintools-unwrapped;
-    };
-
-    clangUseLLVM = wrapCCWith rec {
-      cc = tools.clang-unwrapped;
-      libcxx = targetLlvmLibraries.libcxx;
-      bintools = bintools';
-      extraPackages = [
-        libcxx.cxxabi
-        targetLlvmLibraries.compiler-rt
-      ] ++ lib.optionals (!stdenv.targetPlatform.isWasm) [
-        targetLlvmLibraries.libunwind
-      ];
-      extraBuildCommands = ''
-        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
-      '' + lib.optionalString (!stdenv.targetPlatform.isWasm) ''
-        echo "--unwindlib=libunwind" >> $out/nix-support/cc-cflags
-      '' + lib.optionalString (!stdenv.targetPlatform.isWasm && stdenv.targetPlatform.useLLVM or false) ''
-        echo "-lunwind" >> $out/nix-support/cc-ldflags
-      '' + lib.optionalString stdenv.targetPlatform.isWasm ''
-        echo "-fno-exceptions" >> $out/nix-support/cc-cflags
-      '' + mkExtraBuildCommands cc;
-    };
-
-    clangNoLibcxx = wrapCCWith rec {
-      cc = tools.clang-unwrapped;
-      libcxx = null;
-      bintools = bintools';
-      extraPackages = [
-        targetLlvmLibraries.compiler-rt
-      ];
-      extraBuildCommands = ''
-        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;
-    };
-
-    clangNoLibc = wrapCCWith rec {
-      cc = tools.clang-unwrapped;
-      libcxx = null;
-      bintools = bintoolsNoLibc';
-      extraPackages = [
-        targetLlvmLibraries.compiler-rt
-      ];
-      extraBuildCommands = ''
-        echo "-rtlib=compiler-rt" >> $out/nix-support/cc-cflags
-        echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
-      '' + mkExtraBuildCommands cc;
-    };
-
-    clangNoCompilerRt = wrapCCWith rec {
-      cc = tools.clang-unwrapped;
-      libcxx = null;
-      bintools = bintoolsNoLibc';
-      extraPackages = [ ];
-      extraBuildCommands = ''
-        echo "-nostartfiles" >> $out/nix-support/cc-cflags
-      '' + mkExtraBuildCommands0 cc;
-    };
-
-    clangNoCompilerRtWithLibc = wrapCCWith rec {
-      cc = tools.clang-unwrapped;
-      libcxx = null;
-      bintools = bintools';
-      extraPackages = [ ];
-      extraBuildCommands = mkExtraBuildCommands0 cc;
-    };
-
-  });
-
-  libraries = lib.makeExtensible (libraries: let
-    callPackage = newScope (libraries // buildLlvmTools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch; });
-  in {
-
-    compiler-rt-libc = callPackage ./compiler-rt {
-      inherit llvm_meta;
-      stdenv = if stdenv.hostPlatform.useLLVM or false
-               then overrideCC stdenv buildLlvmTools.clangNoCompilerRtWithLibc
-               else stdenv;
-    };
-
-    compiler-rt-no-libc = callPackage ./compiler-rt {
-      inherit llvm_meta;
-      stdenv = if stdenv.hostPlatform.useLLVM or false
-               then overrideCC stdenv buildLlvmTools.clangNoCompilerRt
-               else stdenv;
-    };
-
-    # N.B. condition is safe because without useLLVM both are the same.
-    compiler-rt =
-      if stdenv.hostPlatform.isAndroid || (stdenv.hostPlatform != stdenv.buildPlatform && stdenv.hostPlatform.isDarwin)
-      then libraries.compiler-rt-libc
-      else libraries.compiler-rt-no-libc;
-
-    stdenv = overrideCC stdenv buildLlvmTools.clang;
-
-    libcxxStdenv = overrideCC stdenv buildLlvmTools.libcxxClang;
-
-    libcxx = callPackage ./libcxx {
-      inherit llvm_meta;
-      stdenv = if stdenv.hostPlatform.useLLVM or false
-               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
-               else stdenv;
-    };
-
-    libcxxabi = callPackage ./libcxxabi {
-      inherit llvm_meta;
-      stdenv = if stdenv.hostPlatform.useLLVM or false
-               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
-               else stdenv;
-    };
-
-    libunwind = callPackage ./libunwind {
-      inherit llvm_meta;
-      inherit (buildLlvmTools) llvm;
-      stdenv = if stdenv.hostPlatform.useLLVM or false
-               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
-               else stdenv;
-    };
-
-    openmp = callPackage ./openmp {
-      inherit llvm_meta targetLlvm;
-    };
-  });
-  noExtend = extensible: lib.attrsets.removeAttrs extensible [ "extend" ];
-
-in { inherit tools libraries release_version; } // (noExtend libraries) // (noExtend tools)
diff --git a/pkgs/development/compilers/llvm/7/libcxx/default.nix b/pkgs/development/compilers/llvm/7/libcxx/default.nix
deleted file mode 100644
index 3834e17fb8dd..000000000000
--- a/pkgs/development/compilers/llvm/7/libcxx/default.nix
+++ /dev/null
@@ -1,89 +0,0 @@
-{ lib, stdenv, llvm_meta, fetch, cmake, python3, fixDarwinDylibNames, version
-, cxxabi ? if stdenv.hostPlatform.isFreeBSD then libcxxrt else libcxxabi
-, libcxxabi, libcxxrt
-, enableShared ? !stdenv.hostPlatform.isStatic
-}:
-
-assert stdenv.isDarwin -> cxxabi.pname == "libcxxabi";
-
-stdenv.mkDerivation {
-  pname = "libcxx";
-  inherit version;
-
-  src = fetch "libcxx" "0kmhcapm2cjwalyiqasj9dmqbw59mcwdl8fgl951wg7ax84b8hj4";
-
-  postUnpack = ''
-    unpackFile ${libcxxabi.src}
-    export LIBCXXABI_INCLUDE_DIR="$PWD/$(ls -d libcxxabi-${version}*)/include"
-  '';
-
-  outputs = [ "out" "dev" ];
-
-  patches = [
-    ./gnu-install-dirs.patch
-  ] ++ lib.optionals stdenv.hostPlatform.isMusl [
-    ../../libcxx-0001-musl-hacks.patch
-  ];
-
-  # Prevent errors like "error: 'foo' is unavailable: introduced in macOS yy.zz"
-  postPatch = ''
-    substituteInPlace include/__config \
-      --replace "#    define _LIBCPP_USE_AVAILABILITY_APPLE" ""
-  '';
-
-  prePatch = ''
-    substituteInPlace lib/CMakeLists.txt --replace "/usr/lib/libc++" "\''${LIBCXX_LIBCXXABI_LIB_PATH}/libc++"
-  '';
-
-  preConfigure = ''
-    # Get headers from the cxxabi source so we can see private headers not installed by the cxxabi package
-    cmakeFlagsArray=($cmakeFlagsArray -DLIBCXX_CXX_ABI_INCLUDE_PATHS="$LIBCXXABI_INCLUDE_DIR")
-  '' + lib.optionalString stdenv.hostPlatform.isMusl ''
-    patchShebangs utils/cat_files.py
-  '';
-
-  nativeBuildInputs = [ cmake ]
-    ++ lib.optional stdenv.hostPlatform.isMusl python3
-    ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
-
-  buildInputs = [ cxxabi ];
-
-  cmakeFlags = [
-    "-DLIBCXX_LIBCPPABI_VERSION=2"
-    "-DLIBCXX_CXX_ABI=${cxxabi.pname}"
-  ] ++ lib.optional stdenv.hostPlatform.isMusl "-DLIBCXX_HAS_MUSL_LIBC=1"
-    ++ lib.optional (cxxabi.pname == "libcxxabi") "-DLIBCXX_LIBCXXABI_LIB_PATH=${cxxabi}/lib"
-    ++ lib.optional (stdenv.hostPlatform.useLLVM or false) "-DLIBCXX_USE_COMPILER_RT=ON"
-    ++ lib.optional (!enableShared) "-DLIBCXX_ENABLE_SHARED=OFF" ;
-
-  preInstall = lib.optionalString (stdenv.isDarwin) ''
-    for file in lib/*.dylib; do
-      if [ -L "$file" ]; then continue; fi
-
-      baseName=$(basename $(${stdenv.cc.targetPrefix}otool -D $file | tail -n 1))
-      installName="$out/lib/$baseName"
-      abiName=$(echo "$baseName" | sed -e 's/libc++/libc++abi/')
-
-      for other in $(${stdenv.cc.targetPrefix}otool -L $file | awk '$1 ~ "/libc\\+\\+abi" { print $1 }'); do
-        ${stdenv.cc.targetPrefix}install_name_tool -change $other ${cxxabi}/lib/$abiName $file
-      done
-    done
-  '';
-
-  passthru = {
-    isLLVM = true;
-    inherit cxxabi;
-  };
-
-  meta = llvm_meta // {
-    homepage = "https://libcxx.llvm.org/";
-    description = "C++ standard library";
-    longDescription = ''
-      libc++ is an implementation of the C++ standard library, targeting C++11,
-      C++14 and above.
-    '';
-    # "All of the code in libc++ is dual licensed under the MIT license and the
-    # UIUC License (a BSD-like license)":
-    license = with lib.licenses; [ mit ncsa ];
-  };
-}
diff --git a/pkgs/development/compilers/llvm/7/libcxx/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/7/libcxx/gnu-install-dirs.patch
deleted file mode 100644
index 910e5287a866..000000000000
--- a/pkgs/development/compilers/llvm/7/libcxx/gnu-install-dirs.patch
+++ /dev/null
@@ -1,72 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index acb49565ce97..6a863926cbca 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -26,6 +26,8 @@ set(CMAKE_MODULE_PATH
- if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
-   project(libcxx CXX C)
- 
-+  include(GNUInstallDirs)
-+
-   set(PACKAGE_NAME libcxx)
-   set(PACKAGE_VERSION 7.0.0)
-   set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
-diff --git a/cmake/Modules/HandleLibCXXABI.cmake b/cmake/Modules/HandleLibCXXABI.cmake
-index 1c19d7e01af7..9c8aee8e8bb7 100644
---- a/cmake/Modules/HandleLibCXXABI.cmake
-+++ b/cmake/Modules/HandleLibCXXABI.cmake
-@@ -59,7 +59,7 @@ macro(setup_abi_lib abidefines abilib abifiles abidirs)
- 
-         if (LIBCXX_INSTALL_HEADERS)
-           install(FILES "${LIBCXX_BINARY_INCLUDE_DIR}/${fpath}"
--            DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}include/c++/v1/${dstdir}
-+            DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}${CMAKE_INSTALL_INCLUDEDIR}/c++/v1/${dstdir}
-             COMPONENT cxx-headers
-             PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
-             )
-diff --git a/include/CMakeLists.txt b/include/CMakeLists.txt
-index d9def18d725c..16494dacaf6f 100644
---- a/include/CMakeLists.txt
-+++ b/include/CMakeLists.txt
-@@ -243,7 +243,7 @@ if (LIBCXX_INSTALL_HEADERS)
-   foreach(file ${files})
-     get_filename_component(dir ${file} DIRECTORY)
-     install(FILES ${file}
--      DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}include/c++/v1/${dir}
-+      DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}${CMAKE_INSTALL_INCLUDEDIR}/c++/v1/${dir}
-       COMPONENT cxx-headers
-       PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
-     )
-@@ -252,7 +252,7 @@ if (LIBCXX_INSTALL_HEADERS)
-   if (LIBCXX_NEEDS_SITE_CONFIG)
-     # Install the generated header as __config.
-     install(FILES ${LIBCXX_BINARY_DIR}/__generated_config
--      DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}include/c++/v1
-+      DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}${CMAKE_INSTALL_INCLUDEDIR}/c++/v1
-       PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
-       RENAME __config
-       COMPONENT cxx-headers)
-diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
-index e068edc8a7af..b63ad92d1d78 100644
---- a/lib/CMakeLists.txt
-+++ b/lib/CMakeLists.txt
-@@ -399,8 +399,8 @@ if (LIBCXX_INSTALL_LIBRARY)
-     set(experimental_lib cxx_experimental)
-   endif()
-   install(TARGETS ${LIBCXX_INSTALL_TARGETS} ${filesystem_lib} ${experimental_lib}
--    LIBRARY DESTINATION ${LIBCXX_INSTALL_PREFIX}lib${LIBCXX_LIBDIR_SUFFIX} COMPONENT cxx
--    ARCHIVE DESTINATION ${LIBCXX_INSTALL_PREFIX}lib${LIBCXX_LIBDIR_SUFFIX} COMPONENT cxx
-+    LIBRARY DESTINATION ${LIBCXX_INSTALL_PREFIX}${CMAKE_INSTALL_LIBDIR}${LIBCXX_LIBDIR_SUFFIX} COMPONENT cxx
-+    ARCHIVE DESTINATION ${LIBCXX_INSTALL_PREFIX}${CMAKE_INSTALL_LIBDIR}${LIBCXX_LIBDIR_SUFFIX} COMPONENT cxx
-     )
-   # NOTE: This install command must go after the cxx install command otherwise
-   # it will not be executed after the library symlinks are installed.
-@@ -408,7 +408,7 @@ if (LIBCXX_INSTALL_LIBRARY)
-     # Replace the libc++ filename with $<TARGET_LINKER_FILE:cxx>
-     # after we required CMake 3.0.
-     install(FILES "${LIBCXX_LIBRARY_DIR}/libc++${CMAKE_SHARED_LIBRARY_SUFFIX}"
--      DESTINATION ${LIBCXX_INSTALL_PREFIX}lib${LIBCXX_LIBDIR_SUFFIX}
-+      DESTINATION ${LIBCXX_INSTALL_PREFIX}${CMAKE_INSTALL_LIBDIR}${LIBCXX_LIBDIR_SUFFIX}
-       COMPONENT libcxx)
-   endif()
- endif()
diff --git a/pkgs/development/compilers/llvm/7/libcxxabi/default.nix b/pkgs/development/compilers/llvm/7/libcxxabi/default.nix
deleted file mode 100644
index c33c61361e2a..000000000000
--- a/pkgs/development/compilers/llvm/7/libcxxabi/default.nix
+++ /dev/null
@@ -1,89 +0,0 @@
-{ lib, stdenv, llvm_meta, cmake, fetch, libcxx, libunwind, llvm, version
-, fetchpatch
-, standalone ? stdenv.hostPlatform.useLLVM or false
-, withLibunwind ? !stdenv.isDarwin && !stdenv.hostPlatform.isWasm
-  # on musl the shared objects don't build
-, enableShared ? !stdenv.hostPlatform.isStatic
-}:
-
-stdenv.mkDerivation {
-  pname = "libcxxabi";
-  inherit version;
-
-  src = fetch "libcxxabi" "1zcqxsdjhawgz1cvpk07y3jl6fg9p3ay4nl69zsirqb2ghgyhhb2";
-
-  outputs = [ "out" "dev" ];
-
-  postUnpack = ''
-    unpackFile ${libcxx.src}
-    unpackFile ${llvm.src}
-    cmakeFlagsArray=($cmakeFlagsArray -DLLVM_PATH=$PWD/$(ls -d llvm-*) -DLIBCXXABI_LIBCXX_PATH=$PWD/$(ls -d libcxx-*) )
-  '' + lib.optionalString stdenv.isDarwin ''
-    export TRIPLE=x86_64-apple-darwin
-  '' + lib.optionalString stdenv.hostPlatform.isMusl ''
-    patch -p1 -d $(ls -d libcxx-*) -i ${../../libcxx-0001-musl-hacks.patch}
-  '' + lib.optionalString (!stdenv.cc.isClang) ''
-    pushd libcxx-*
-    patch -p2 < ${fetchpatch {
-      url = "https://github.com/llvm/llvm-project/commit/76ccec07b4fa0cc68dfd07d557e7fb661804a468.patch";
-      sha256 = "1lgzkfkp7qinfc6gd8x5di1iq1gqdv81249c6f02chn9q122sbq1";
-    }}
-    popd
-  '';
-
-  patches = [
-    ./gnu-install-dirs.patch
-  ];
-
-  nativeBuildInputs = [ cmake ];
-  buildInputs = lib.optional withLibunwind libunwind;
-
-  cmakeFlags = lib.optionals standalone [
-    "-DLLVM_ENABLE_LIBCXX=ON"
-  ] ++ lib.optionals (standalone && withLibunwind) [
-    "-DLIBCXXABI_USE_LLVM_UNWINDER=ON"
-  ] ++ lib.optional (!enableShared) "-DLIBCXXABI_ENABLE_SHARED=OFF";
-
-  preInstall = lib.optionalString stdenv.isDarwin ''
-    for file in lib/*.dylib; do
-      if [ -L "$file" ]; then continue; fi
-
-      # Fix up the install name. Preserve the basename, just replace the path.
-      installName="$out/lib/$(basename $(${stdenv.cc.targetPrefix}otool -D $file | tail -n 1))"
-
-      # 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
-      # https://gitlab.kitware.com/cmake/community/-/wikis/doc/cmake/RPATH-handling
-      ${stdenv.cc.targetPrefix}install_name_tool -id $installName $file
-
-      # cc-wrapper passes '-lc++abi' to all c++ link steps, but that causes
-      # libcxxabi to sometimes link against a different version of itself.
-      # Here we simply make that second reference point to ourselves.
-      for other in $(${stdenv.cc.targetPrefix}otool -L $file | awk '$1 ~ "/libc\\+\\+abi" { print $1 }'); do
-        ${stdenv.cc.targetPrefix}install_name_tool -change $other $installName $file
-      done
-    done
-  '';
-
-  postInstall = ''
-    mkdir -p "$dev/include"
-    install -m 644 ../include/${if stdenv.isDarwin then "*" else "cxxabi.h"} "$dev/include"
-  '';
-
-  passthru = {
-    libName = "c++abi";
-  };
-
-  meta = llvm_meta // {
-    homepage = "https://libcxxabi.llvm.org/";
-    description = "Provides C++ standard library support";
-    longDescription = ''
-      libc++abi is a new implementation of low level support for a standard C++ library.
-    '';
-    # "All of the code in libc++abi is dual licensed under the MIT license and
-    # the UIUC License (a BSD-like license)":
-    license = with lib.licenses; [ mit ncsa ];
-    maintainers = llvm_meta.maintainers ++ [ lib.maintainers.vlstill ];
-  };
-}
diff --git a/pkgs/development/compilers/llvm/7/libcxxabi/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/7/libcxxabi/gnu-install-dirs.patch
deleted file mode 100644
index 92d9e94fdee7..000000000000
--- a/pkgs/development/compilers/llvm/7/libcxxabi/gnu-install-dirs.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index d6648ede1f59..55a8f17ca5e6 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -20,6 +20,8 @@ set(CMAKE_MODULE_PATH
- if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
-   project(libcxxabi CXX C)
- 
-+  include(GNUInstallDirs)
-+
-   set(PACKAGE_NAME libcxxabi)
-   set(PACKAGE_VERSION 7.0.0svn)
-   set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
-diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
-index 776c51294330..314b45feac69 100644
---- a/src/CMakeLists.txt
-+++ b/src/CMakeLists.txt
-@@ -195,8 +195,8 @@ add_custom_target(cxxabi DEPENDS ${LIBCXXABI_BUILD_TARGETS})
- 
- if (LIBCXXABI_INSTALL_LIBRARY)
-   install(TARGETS ${LIBCXXABI_INSTALL_TARGETS}
--    LIBRARY DESTINATION ${LIBCXXABI_INSTALL_PREFIX}lib${LIBCXXABI_LIBDIR_SUFFIX} COMPONENT cxxabi
--    ARCHIVE DESTINATION ${LIBCXXABI_INSTALL_PREFIX}lib${LIBCXXABI_LIBDIR_SUFFIX} COMPONENT cxxabi
-+    LIBRARY DESTINATION ${LIBCXXABI_INSTALL_PREFIX}${CMAKE_INSTALL_LIBDIR}${LIBCXXABI_LIBDIR_SUFFIX} COMPONENT cxxabi
-+    ARCHIVE DESTINATION ${LIBCXXABI_INSTALL_PREFIX}${CMAKE_INSTALL_LIBDIR}${LIBCXXABI_LIBDIR_SUFFIX} COMPONENT cxxabi
-     )
- endif()
- 
diff --git a/pkgs/development/compilers/llvm/7/libunwind/default.nix b/pkgs/development/compilers/llvm/7/libunwind/default.nix
deleted file mode 100644
index 426895029b3e..000000000000
--- a/pkgs/development/compilers/llvm/7/libunwind/default.nix
+++ /dev/null
@@ -1,53 +0,0 @@
-{ lib, stdenv, llvm_meta, version, fetch, fetchpatch, cmake, llvm
-, enableShared ? !stdenv.hostPlatform.isStatic
-}:
-
-stdenv.mkDerivation rec {
-  pname = "libunwind";
-  inherit version;
-
-  src = fetch pname "035dsxs10nyiqd00q07yycvmkjl01yz4jdlrjvmch8klxg4pyjhp";
-
-  postUnpack = ''
-    unpackFile ${llvm.src}
-    cmakeFlagsArray=($cmakeFlagsArray -DLLVM_PATH=$PWD/$(ls -d llvm-*))
-  '';
-
-  patches = [
-    ./gnu-install-dirs.patch
-  ] ++ lib.optionals (stdenv.hostPlatform.useLLVM or false) [
-    # removes use of `new` that require libc++
-    (fetchpatch {
-      url = "https://github.com/llvm-mirror/libunwind/commit/34a45c630d4c79af403661d267db42fbe7de1178.patch";
-      sha256 = "0n0pv6jvcky8pn3srhrf9x5kbnd0d2kia9xlx2g590f5q0bgwfhv";
-    })
-    # cleans up remaining libc++ dependencies (mostly header inclusions)
-    (fetchpatch {
-      url = "https://github.com/llvm-mirror/libunwind/commit/e050272d2eb57eb4e56a37b429a61df2ebb8aa3e.patch";
-      sha256 = "170mwmj0wf40iyk1kzdpaiy36rz9n8dpl881h4h7s5da0rh51xya";
-      includes = [ "src/libunwind.cpp" "src/UnwindCursor.hpp" ];
-    })
-  ];
-
-  outputs = [ "out" "dev" ];
-
-  nativeBuildInputs = [ cmake ];
-
-  cmakeFlags = lib.optionals (!enableShared) [
-    "-DLIBUNWIND_ENABLE_SHARED=OFF"
-  ] ++ lib.optionals (stdenv.hostPlatform.useLLVM or false) [
-    "-DLLVM_ENABLE_LIBCXX=ON"
-  ];
-
-  meta = llvm_meta // {
-    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
-    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
-    description = "LLVM's unwinder library";
-    longDescription = ''
-      The unwind library provides a family of _Unwind_* functions implementing
-      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
-      I). It is a dependency of the C++ ABI library, and sometimes is a
-      dependency of other runtimes.
-    '';
-  };
-}
diff --git a/pkgs/development/compilers/llvm/7/libunwind/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/7/libunwind/gnu-install-dirs.patch
deleted file mode 100644
index 21d4fa80ea13..000000000000
--- a/pkgs/development/compilers/llvm/7/libunwind/gnu-install-dirs.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 0e48d713837a..05483c367bd1 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -18,6 +18,8 @@ set(CMAKE_MODULE_PATH
- if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
-   project(libunwind)
- 
-+  include(GNUInstallDirs)
-+
-   # Rely on llvm-config.
-   set(CONFIG_OUTPUT)
-   if(NOT LLVM_CONFIG_PATH)
-diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
-index 937159e2cb86..07f8b936e7e5 100644
---- a/src/CMakeLists.txt
-+++ b/src/CMakeLists.txt
-@@ -141,8 +141,8 @@ add_custom_target(unwind DEPENDS ${LIBUNWIND_BUILD_TARGETS})
- 
- if (LIBUNWIND_INSTALL_LIBRARY)
-   install(TARGETS ${LIBUNWIND_INSTALL_TARGETS}
--    LIBRARY DESTINATION ${LIBUNWIND_INSTALL_PREFIX}lib${LIBUNWIND_LIBDIR_SUFFIX} COMPONENT unwind
--    ARCHIVE DESTINATION ${LIBUNWIND_INSTALL_PREFIX}lib${LIBUNWIND_LIBDIR_SUFFIX} COMPONENT unwind)
-+    LIBRARY DESTINATION ${LIBUNWIND_INSTALL_PREFIX}${CMAKE_INSTALL_LIBDIR}${LIBUNWIND_LIBDIR_SUFFIX} COMPONENT unwind
-+    ARCHIVE DESTINATION ${LIBUNWIND_INSTALL_PREFIX}${CMAKE_INSTALL_LIBDIR}${LIBUNWIND_LIBDIR_SUFFIX} COMPONENT unwind)
- endif()
- 
- if (NOT CMAKE_CONFIGURATION_TYPES AND LIBUNWIND_INSTALL_LIBRARY)
diff --git a/pkgs/development/compilers/llvm/7/lld/default.nix b/pkgs/development/compilers/llvm/7/lld/default.nix
deleted file mode 100644
index 2016e6321e0f..000000000000
--- a/pkgs/development/compilers/llvm/7/lld/default.nix
+++ /dev/null
@@ -1,46 +0,0 @@
-{ lib, stdenv, llvm_meta
-, buildLlvmTools
-, fetch
-, cmake
-, libxml2
-, libllvm
-, version
-}:
-
-stdenv.mkDerivation rec {
-  pname = "lld";
-  inherit version;
-
-  src = fetch pname "0rsqb7zcnij5r5ipfhr129j7skr5n9pyr388kjpqwh091952f3x1";
-
-  patches = [
-    ./gnu-install-dirs.patch
-  ];
-
-  nativeBuildInputs = [ cmake ];
-  buildInputs = [ libllvm libxml2 ];
-
-  cmakeFlags = [
-    "-DLLVM_CONFIG_PATH=${libllvm.dev}/bin/llvm-config${lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) "-native"}"
-  ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
-    "-DLLVM_TABLEGEN_EXE=${buildLlvmTools.llvm}/bin/llvm-tblgen"
-  ];
-
-  # Musl's default stack size is too small for lld to be able to link Firefox.
-  LDFLAGS = lib.optionalString stdenv.hostPlatform.isMusl "-Wl,-z,stack-size=2097152";
-
-  outputs = [ "out" "lib" "dev" ];
-
-  meta = llvm_meta // {
-    homepage = "https://lld.llvm.org/";
-    description = "The LLVM linker (unwrapped)";
-    longDescription = ''
-      LLD is a linker from the LLVM project that is a drop-in replacement for
-      system linkers and runs much faster than them. It also provides features
-      that are useful for toolchain developers.
-      The linker supports ELF (Unix), PE/COFF (Windows), and Mach-O (macOS)
-      in descending order of completeness. Internally, LLD consists
-      of several different linkers.
-    '';
-  };
-}
diff --git a/pkgs/development/compilers/llvm/7/lld/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/7/lld/gnu-install-dirs.patch
deleted file mode 100644
index acc2d3d47760..000000000000
--- a/pkgs/development/compilers/llvm/7/lld/gnu-install-dirs.patch
+++ /dev/null
@@ -1,68 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index e2fbdbfbbb47..d601b231ebb8 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -6,6 +6,8 @@ if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
-   set(CMAKE_INCLUDE_CURRENT_DIR ON)
-   set(LLD_BUILT_STANDALONE TRUE)
- 
-+  include(GNUInstallDirs)
-+
-   find_program(LLVM_CONFIG_PATH "llvm-config" DOC "Path to llvm-config binary")
-   if(NOT LLVM_CONFIG_PATH)
-     message(FATAL_ERROR "llvm-config not found: specify LLVM_CONFIG_PATH")
-@@ -203,7 +205,7 @@ include_directories(BEFORE
- 
- if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-   install(DIRECTORY include/
--    DESTINATION include
-+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-     FILES_MATCHING
-     PATTERN "*.h"
-     PATTERN ".svn" EXCLUDE
-diff --git a/cmake/modules/AddLLD.cmake b/cmake/modules/AddLLD.cmake
-index fa48b428d26b..e7967aad3ceb 100644
---- a/cmake/modules/AddLLD.cmake
-+++ b/cmake/modules/AddLLD.cmake
-@@ -20,9 +20,9 @@ macro(add_lld_library name)
-     install(TARGETS ${name}
-       COMPONENT ${name}
-       ${export_to_lldtargets}
--      LIBRARY DESTINATION lib${LLVM_LIBDIR_SUFFIX}
--      ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX}
--      RUNTIME DESTINATION bin)
-+      LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}
-+      ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}
-+      RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
- 
-     if (${ARG_SHARED} AND NOT CMAKE_CONFIGURATION_TYPES)
-       add_llvm_install_targets(install-${name}
-@@ -54,7 +54,7 @@ macro(add_lld_tool name)
- 
-     install(TARGETS ${name}
-       ${export_to_lldtargets}
--      RUNTIME DESTINATION bin
-+      RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-       COMPONENT ${name})
- 
-     if(NOT CMAKE_CONFIGURATION_TYPES)
-@@ -69,5 +69,5 @@ endmacro()
- macro(add_lld_symlink name dest)
-   add_llvm_tool_symlink(${name} ${dest} ALWAYS_GENERATE)
-   # Always generate install targets
--  llvm_install_symlink(${name} ${dest} ALWAYS_GENERATE)
-+  llvm_install_symlink(${name} ${dest} ${CMAKE_INSTALL_FULL_BINDIR} ALWAYS_GENERATE)
- endmacro()
-diff --git a/tools/lld/CMakeLists.txt b/tools/lld/CMakeLists.txt
-index d8829493fc22..df748a0e749b 100644
---- a/tools/lld/CMakeLists.txt
-+++ b/tools/lld/CMakeLists.txt
-@@ -16,7 +16,7 @@ target_link_libraries(lld
-   )
- 
- install(TARGETS lld
--  RUNTIME DESTINATION bin)
-+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
- 
- if(NOT LLD_SYMLINKS_TO_CREATE)
-   set(LLD_SYMLINKS_TO_CREATE lld-link ld.lld ld64.lld wasm-ld)
diff --git a/pkgs/development/compilers/llvm/7/lldb/default.nix b/pkgs/development/compilers/llvm/7/lldb/default.nix
deleted file mode 100644
index 02e3cdcb8eb9..000000000000
--- a/pkgs/development/compilers/llvm/7/lldb/default.nix
+++ /dev/null
@@ -1,95 +0,0 @@
-{ lib, stdenv, llvm_meta
-, fetch
-, cmake
-, zlib
-, ncurses
-, swig
-, which
-, libedit
-, libxml2
-, libllvm
-, libclang
-, perl
-, python3
-, version
-, darwin
-}:
-
-stdenv.mkDerivation rec {
-  pname = "lldb";
-  inherit version;
-
-  src = fetch "lldb" "0klsscg1sczc4nw2l53xggi969k361cng2sjjrfp3bv4g5x14s4v";
-
-  patches = [
-    ./gnu-install-dirs.patch
-  ];
-
-  postPatch = ''
-    # Fix up various paths that assume llvm and clang are installed in the same place
-    sed -i 's,".*ClangConfig.cmake","${libclang.dev}/lib/cmake/clang/ClangConfig.cmake",' \
-      cmake/modules/LLDBStandalone.cmake
-    sed -i 's,".*tools/clang/include","${libclang.dev}/include",' \
-      cmake/modules/LLDBStandalone.cmake
-    sed -i 's,"$.LLVM_LIBRARY_DIR.",${libllvm.lib}/lib ${libclang.lib}/lib,' \
-      cmake/modules/LLDBStandalone.cmake
-    sed -i -e 's,message(SEND_ERROR "Cannot find debugserver on system."),,' \
-           -e 's,string(STRIP ''${XCODE_DEV_DIR} XCODE_DEV_DIR),,' \
-           tools/debugserver/source/CMakeLists.txt
-
-    # Fix /usr/bin references for sandboxed builds.
-    patchShebangs scripts
-  '';
-
-  outputs = [ "out" "lib" "dev" ];
-
-  nativeBuildInputs = [
-    cmake perl python3 which swig
-  ];
-
-  buildInputs = [
-    ncurses zlib libedit libxml2 libllvm
-  ] ++ 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
-    darwin.apple_sdk.frameworks.DebugSymbols
-  ];
-
-  CXXFLAGS = "-fno-rtti";
-  hardeningDisable = [ "format" ];
-
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-I${libxml2.dev}/include/libxml2";
-
-  cmakeFlags = [
-    "-DLLDB_INCLUDE_TESTS=${if doCheck then "YES" else "NO"}"
-    "-DLLDB_CODESIGN_IDENTITY=" # codesigning makes nondeterministic
-    "-DSKIP_DEBUGSERVER=ON"
-  ] ++ lib.optionals doCheck [
-    "-DLLDB_TEST_C_COMPILER=${stdenv.cc}/bin/${stdenv.cc.targetPrefix}cc"
-    "-DLLDB_TEST_CXX_COMPILER=${stdenv.cc}/bin/${stdenv.cc.targetPrefix}c++"
-  ];
-
-  doCheck = false;
-
-  postInstall = ''
-    mkdir -p $out/share/man/man1
-    cp ../docs/lldb.1 $out/share/man/man1/
-  '';
-
-  meta = llvm_meta // {
-    homepage = "https://lldb.llvm.org/";
-    description = "A next-generation high-performance debugger";
-    longDescription = ''
-      LLDB is a next generation, high-performance debugger. It is built as a set
-      of reusable components which highly leverage existing libraries in the
-      larger LLVM Project, such as the Clang expression parser and LLVM
-      disassembler.
-    '';
-    # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
-  };
-}
diff --git a/pkgs/development/compilers/llvm/7/lldb/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/7/lldb/gnu-install-dirs.patch
deleted file mode 100644
index 40645743ecc7..000000000000
--- a/pkgs/development/compilers/llvm/7/lldb/gnu-install-dirs.patch
+++ /dev/null
@@ -1,76 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 00ddcdc1488f..af2aa238939a 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -7,6 +7,8 @@ set(CMAKE_MODULE_PATH
-   "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules"
-   )
- 
-+include(GNUInstallDirs)
-+
- include(LLDBStandalone)
- include(LLDBConfig)
- include(AddLLDB)
-diff --git a/cmake/modules/AddLLDB.cmake b/cmake/modules/AddLLDB.cmake
-index 129a5ef7500d..fb3fb3ce655c 100644
---- a/cmake/modules/AddLLDB.cmake
-+++ b/cmake/modules/AddLLDB.cmake
-@@ -56,14 +56,14 @@ function(add_lldb_library name)
-         endif()
-         install(TARGETS ${name}
-           COMPONENT ${name}
--          RUNTIME DESTINATION bin
-+          RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-           LIBRARY DESTINATION ${out_dir}
-           ARCHIVE DESTINATION ${out_dir})
-       else()
-         install(TARGETS ${name}
-           COMPONENT ${name}
--          LIBRARY DESTINATION lib${LLVM_LIBDIR_SUFFIX}
--          ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX})
-+          LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}
-+          ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX})
-       endif()
-       if (NOT CMAKE_CONFIGURATION_TYPES)
-         add_llvm_install_targets(install-${name}
-@@ -121,7 +121,7 @@ function(add_lldb_executable name)
-   endif()
- 
-   if(ARG_GENERATE_INSTALL)
--    set(out_dir "bin")
-+    set(out_dir "${CMAKE_INSTALL_BINDIR}")
-     if (LLDB_BUILD_FRAMEWORK AND ARG_INCLUDE_IN_SUITE)
-       set(out_dir ${LLDB_FRAMEWORK_INSTALL_DIR}/${LLDB_FRAMEWORK_RESOURCE_DIR})
-     endif()
-diff --git a/cmake/modules/LLDBConfig.cmake b/cmake/modules/LLDBConfig.cmake
-index dae6e365da38..ef272d5de5c0 100644
---- a/cmake/modules/LLDBConfig.cmake
-+++ b/cmake/modules/LLDBConfig.cmake
-@@ -278,7 +278,7 @@ include_directories(BEFORE
- if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-   install(DIRECTORY include/
-     COMPONENT lldb-headers
--    DESTINATION include
-+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-     FILES_MATCHING
-     PATTERN "*.h"
-     PATTERN ".svn" EXCLUDE
-@@ -288,7 +288,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
- 
-   install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/include/
-     COMPONENT lldb-headers
--    DESTINATION include
-+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-     FILES_MATCHING
-     PATTERN "*.h"
-     PATTERN ".svn" EXCLUDE
-diff --git a/tools/intel-features/CMakeLists.txt b/tools/intel-features/CMakeLists.txt
-index b5316540fdf3..3c3c882d503f 100644
---- a/tools/intel-features/CMakeLists.txt
-+++ b/tools/intel-features/CMakeLists.txt
-@@ -64,4 +64,4 @@ if (NOT LLDB_DISABLE_PYTHON AND LLDB_BUILD_INTEL_PT)
- endif()
- 
- install(TARGETS lldbIntelFeatures
--  LIBRARY DESTINATION lib${LLVM_LIBDIR_SUFFIX})
-+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX})
diff --git a/pkgs/development/compilers/llvm/7/llvm/default.nix b/pkgs/development/compilers/llvm/7/llvm/default.nix
deleted file mode 100644
index 71beb79a1cda..000000000000
--- a/pkgs/development/compilers/llvm/7/llvm/default.nix
+++ /dev/null
@@ -1,332 +0,0 @@
-{ lib, stdenv, llvm_meta
-, pkgsBuildBuild
-, fetch
-, fetchpatch
-, cmake
-, python3
-, libffi
-, enableGoldPlugin ? libbfd.hasPluginAPI
-, libbfd
-, libpfm
-, libxml2
-, ncurses
-, version
-, release_version
-, zlib
-, buildLlvmTools
-, debugVersion ? false
-, doCheck ? stdenv.isLinux && (!stdenv.isx86_32)
-  && (stdenv.hostPlatform == stdenv.buildPlatform)
-, enableManpages ? false
-, enableSharedLibraries ? !stdenv.hostPlatform.isStatic
-# broken for Ampere eMAG 8180 (c2.large.arm on Packet) #56245
-# broken for the armv7l builder
-, enablePFM ? stdenv.isLinux && !stdenv.hostPlatform.isAarch
-, enablePolly ? false
-}:
-
-let
-  inherit (lib) optional optionals optionalString;
-
-  # Used when creating a versioned symlinks of libLLVM.dylib
-  versionSuffixes = with lib;
-    let parts = splitVersion release_version; in
-    imap (i: _: concatStringsSep "." (take i parts)) parts;
-
-  # Ordinarily we would just the `doCheck` and `checkDeps` functionality
-  # `mkDerivation` gives us to manage our test dependencies (instead of breaking
-  # out `doCheck` as a package level attribute).
-  #
-  # Unfortunately `lit` does not forward `$PYTHONPATH` to children processes, in
-  # particular the children it uses to do feature detection.
-  #
-  # This means that python deps we add to `checkDeps` (which the python
-  # interpreter is made aware of via `$PYTHONPATH` – populated by the python
-  # setup hook) are not picked up by `lit` which causes it to skip tests.
-  #
-  # Adding `python3.withPackages (ps: [ ... ])` to `checkDeps` also doesn't work
-  # because this package is shadowed in `$PATH` by the regular `python3`
-  # package.
-  #
-  # So, we "manually" assemble one python derivation for the package to depend
-  # on, taking into account whether checks are enabled or not:
-  python = if doCheck then
-    let
-      checkDeps = ps: with ps; [ psutil ];
-    in python3.withPackages checkDeps
-  else python3;
-
-in stdenv.mkDerivation (rec {
-  pname = "llvm";
-  inherit version;
-
-  src = fetch "llvm" "0r1p5didv4rkgxyvbkyz671xddg6i3dxvbpsi1xxipkla0l9pk0v";
-  polly_src = fetch "polly" "16qkns4ab4x0azrvhy4j7cncbyb2rrbdrqj87zphvqxm5pvm8m1h";
-
-  unpackPhase = ''
-    unpackFile $src
-    mv llvm-${version}* llvm
-    sourceRoot=$PWD/llvm
-  '' + optionalString enablePolly ''
-    unpackFile $polly_src
-    mv polly-* $sourceRoot/tools/polly
-  '';
-
-  outputs = [ "out" "lib" "dev" "python" ];
-
-  nativeBuildInputs = [ cmake python ]
-    ++ optional enableManpages python3.pkgs.sphinx;
-
-  buildInputs = [ libxml2 libffi ]
-    ++ optional enablePFM libpfm; # exegesis
-
-  propagatedBuildInputs = [ ncurses zlib ];
-
-  patches = [
-    # backport, fix building rust crates with lto
-    (fetchpatch {
-      url = "https://github.com/llvm-mirror/llvm/commit/da1fb72bb305d6bc1f3899d541414146934bf80f.patch";
-      sha256 = "0p81gkhc1xhcx0hmnkwyhrn8x8l8fd24xgaj1whni29yga466dwc";
-    })
-    (fetchpatch {
-      url = "https://github.com/llvm-mirror/llvm/commit/cc1f2a595ead516812a6c50398f0f3480ebe031f.patch";
-      sha256 = "0k6k1p5yisgwx417a67s7sr9930rqh1n0zv5jvply8vjjy4b3kf8";
-    })
-
-    # When cross-compiling we configure llvm-config-native with an approximation
-    # of the flags used for the normal LLVM build. To avoid the need for building
-    # a native libLLVM.so (which would fail) we force llvm-config to be linked
-    # statically against the necessary LLVM components always.
-    ../../llvm-config-link-static.patch
-
-    ./gnu-install-dirs.patch
-
-    # Fix invalid std::string(nullptr) for GCC 12
-    (fetchpatch {
-      name = "nvptx-gcc-12.patch";
-      url = "https://github.com/llvm/llvm-project/commit/99e64623ec9b31def9375753491cc6093c831809.patch";
-      sha256 = "0zjfjgavqzi2ypqwqnlvy6flyvdz8hi1anwv0ybwnm2zqixg7za3";
-      stripLen = 1;
-    })
-
-    ../../llvm-7-musl.patch
-  ] ++ lib.optionals enablePolly [
-    ./gnu-install-dirs-polly.patch
-    # Add missing isl header includess required to build LLVM 7 + Polly with clang 16.
-    (fetchpatch {
-      name = "polly-ppcg-isl-headers.patch";
-      url = "https://repo.or.cz/ppcg.git/patch/098ba285306114dc71497f7b51c357f69c9b4472";
-      hash = "sha256-c9L30rDROYAMbUSuaK9U/ixyFMlH/Sa1n+VgLODzSCQ=";
-      extraPrefix = "tools/polly/lib/External/ppcg/";
-      stripLen = 1;
-    })
-  ];
-
-  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/../''${CMAKE_INSTALL_LIBDIR}" ''${extra_libdir})' ""
-  '' + ''
-    # 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
-  '' + optionalString stdenv.hostPlatform.isAarch32 ''
-    # skip failing X86 test cases on armv7l
-    rm test/DebugInfo/X86/debug_addr.ll
-    rm test/tools/llvm-dwarfdump/X86/debug_addr.s
-    rm test/tools/llvm-dwarfdump/X86/debug_addr_address_size_mismatch.s
-    rm test/tools/llvm-dwarfdump/X86/debug_addr_dwarf4.s
-    rm test/tools/llvm-dwarfdump/X86/debug_addr_unsupported_version.s
-    rm test/tools/llvm-dwarfdump/X86/debug_addr_version_mismatch.s
-  '' + optionalString (stdenv.hostPlatform.system == "armv6l-linux") ''
-    # Seems to require certain floating point hardware (NEON?)
-    rm test/ExecutionEngine/frem.ll
-  '' + ''
-    patchShebangs test/BugPoint/compile-custom.ll.py
-  '' + ''
-    # Tweak tests to ignore namespace part of type to support
-    # gcc-12: https://gcc.gnu.org/PR103598.
-    # The change below mangles strings like:
-    #    CHECK-NEXT: Starting llvm::Function pass manager run.
-    # to:
-    #    CHECK-NEXT: Starting {{.*}}Function pass manager run.
-    for f in \
-      test/Other/new-pass-manager.ll \
-      test/Other/new-pm-defaults.ll \
-      test/Other/new-pm-lto-defaults.ll \
-      test/Other/new-pm-thinlto-defaults.ll \
-      test/Other/pass-pipeline-parsing.ll \
-      test/Transforms/Inline/cgscc-incremental-invalidate.ll \
-      test/Transforms/Inline/clear-analyses.ll \
-      test/Transforms/LoopUnroll/unroll-loop-invalidation.ll \
-      test/Transforms/SCCP/preserve-analysis.ll \
-      test/Transforms/SROA/dead-inst.ll \
-      test/tools/gold/X86/new-pm.ll \
-      ; do
-      echo "PATCH: $f"
-      substituteInPlace $f \
-        --replace 'Starting llvm::' 'Starting {{.*}}' \
-        --replace 'Finished llvm::' 'Finished {{.*}}'
-    done
-  '';
-
-  preConfigure = ''
-    # Workaround for configure flags that need to have spaces
-    cmakeFlagsArray+=(
-      -DLLVM_LIT_ARGS='-svj''${NIX_BUILD_CORES} --no-progress-bar'
-    )
-  '';
-
-  # hacky fix: created binaries need to be run before installation
-  preBuild = ''
-    mkdir -p $out/
-    ln -sv $PWD/lib $out
-  '';
-
-  cmakeBuildType = if debugVersion then "Debug" else "Release";
-
-  cmakeFlags = with stdenv; let
-    # These flags influence llvm-config's BuildVariables.inc in addition to the
-    # general build. We need to make sure these are also passed via
-    # CROSS_TOOLCHAIN_FLAGS_NATIVE when cross-compiling or llvm-config-native
-    # will return different results from the cross llvm-config.
-    #
-    # Some flags don't need to be repassed because LLVM already does so (like
-    # CMAKE_BUILD_TYPE), others are irrelevant to the result.
-    flagsForLlvmConfig = [
-      "-DLLVM_INSTALL_CMAKE_DIR=${placeholder "dev"}/lib/cmake/llvm/"
-      "-DLLVM_ENABLE_RTTI=ON"
-    ] ++ optionals enableSharedLibraries [
-      "-DLLVM_LINK_LLVM_DYLIB=ON"
-    ];
-  in flagsForLlvmConfig ++ [
-    "-DLLVM_INSTALL_UTILS=ON"  # Needed by rustc
-    "-DLLVM_BUILD_TESTS=${if doCheck then "ON" else "OFF"}"
-    "-DLLVM_ENABLE_FFI=ON"
-    "-DLLVM_HOST_TRIPLE=${stdenv.hostPlatform.config}"
-    "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.hostPlatform.config}"
-    "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly"
-    "-DLLVM_ENABLE_DUMP=ON"
-  ] ++ optionals enableManpages [
-    "-DLLVM_BUILD_DOCS=ON"
-    "-DLLVM_ENABLE_SPHINX=ON"
-    "-DSPHINX_OUTPUT_MAN=ON"
-    "-DSPHINX_OUTPUT_HTML=OFF"
-    "-DSPHINX_WARNINGS_AS_ERRORS=OFF"
-  ] ++ optionals (enableGoldPlugin) [
-    "-DLLVM_BINUTILS_INCDIR=${libbfd.dev}/include"
-  ] ++ optionals (isDarwin) [
-    "-DLLVM_ENABLE_LIBCXX=ON"
-    "-DCAN_TARGET_i386=false"
-  ] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
-    "-DCMAKE_CROSSCOMPILING=True"
-    "-DLLVM_TABLEGEN=${buildLlvmTools.llvm}/bin/llvm-tblgen"
-    (
-      let
-        nativeCC = pkgsBuildBuild.targetPackages.stdenv.cc;
-        nativeBintools = nativeCC.bintools.bintools;
-        nativeToolchainFlags = [
-          "-DCMAKE_C_COMPILER=${nativeCC}/bin/${nativeCC.targetPrefix}cc"
-          "-DCMAKE_CXX_COMPILER=${nativeCC}/bin/${nativeCC.targetPrefix}c++"
-          "-DCMAKE_AR=${nativeBintools}/bin/${nativeBintools.targetPrefix}ar"
-          "-DCMAKE_STRIP=${nativeBintools}/bin/${nativeBintools.targetPrefix}strip"
-          "-DCMAKE_RANLIB=${nativeBintools}/bin/${nativeBintools.targetPrefix}ranlib"
-        ];
-        # We need to repass the custom GNUInstallDirs values, otherwise CMake
-        # will choose them for us, leading to wrong results in llvm-config-native
-        nativeInstallFlags = [
-          "-DCMAKE_INSTALL_PREFIX=${placeholder "out"}"
-          "-DCMAKE_INSTALL_BINDIR=${placeholder "out"}/bin"
-          "-DCMAKE_INSTALL_INCLUDEDIR=${placeholder "dev"}/include"
-          "-DCMAKE_INSTALL_LIBDIR=${placeholder "lib"}/lib"
-          "-DCMAKE_INSTALL_LIBEXECDIR=${placeholder "lib"}/libexec"
-        ];
-      in "-DCROSS_TOOLCHAIN_FLAGS_NATIVE:list="
-      + lib.concatStringsSep ";" (lib.concatLists [
-        flagsForLlvmConfig
-        nativeToolchainFlags
-        nativeInstallFlags
-      ])
-    )
-  ];
-
-  postBuild = ''
-    rm -fR $out
-  '';
-
-  preCheck = ''
-    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH''${LD_LIBRARY_PATH:+:}$PWD/lib
-  '';
-
-  postInstall = ''
-    mkdir -p $python/share
-    mv $out/share/opt-viewer $python/share/opt-viewer
-    moveToOutput "bin/llvm-config*" "$dev"
-    substituteInPlace "$dev/lib/cmake/llvm/LLVMExports-${if debugVersion then "debug" else "release"}.cmake" \
-      --replace "\''${_IMPORT_PREFIX}/lib/lib" "$lib/lib/lib" \
-      --replace "$out/bin/llvm-config" "$dev/bin/llvm-config"
-    substituteInPlace "$dev/lib/cmake/llvm/LLVMConfig.cmake" \
-      --replace 'set(LLVM_BINARY_DIR "''${LLVM_INSTALL_PREFIX}")' 'set(LLVM_BINARY_DIR "''${LLVM_INSTALL_PREFIX}'"$lib"'")'
-  ''
-  + optionalString (stdenv.isDarwin && enableSharedLibraries) ''
-    ${lib.concatMapStringsSep "\n" (v: ''
-      ln -s $lib/lib/libLLVM.dylib $lib/lib/libLLVM-${v}.dylib
-    '') versionSuffixes}
-  ''
-  + optionalString (stdenv.buildPlatform != stdenv.hostPlatform) ''
-    cp NATIVE/bin/llvm-config $dev/bin/llvm-config-native
-  '';
-
-  inherit doCheck;
-
-  checkTarget = "check-all";
-
-  requiredSystemFeatures = [ "big-parallel" ];
-  meta = llvm_meta // {
-    homepage = "https://llvm.org/";
-    description = "A collection of modular and reusable compiler and toolchain technologies";
-    longDescription = ''
-      The LLVM Project is a collection of modular and reusable compiler and
-      toolchain technologies. Despite its name, LLVM has little to do with
-      traditional virtual machines. The name "LLVM" itself is not an acronym; it
-      is the full name of the project.
-      LLVM began as a research project at the University of Illinois, with the
-      goal of providing a modern, SSA-based compilation strategy capable of
-      supporting both static and dynamic compilation of arbitrary programming
-      languages. Since then, LLVM has grown to be an umbrella project consisting
-      of a number of subprojects, many of which are being used in production by
-      a wide variety of commercial and open source projects as well as being
-      widely used in academic research. Code in the LLVM project is licensed
-      under the "Apache 2.0 License with LLVM exceptions".
-    '';
-  };
-} // 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 = llvm_meta // {
-    description = "man pages for LLVM ${version}";
-  };
-})
diff --git a/pkgs/development/compilers/llvm/7/llvm/gnu-install-dirs-polly.patch b/pkgs/development/compilers/llvm/7/llvm/gnu-install-dirs-polly.patch
deleted file mode 100644
index 0b2d3b79e41f..000000000000
--- a/pkgs/development/compilers/llvm/7/llvm/gnu-install-dirs-polly.patch
+++ /dev/null
@@ -1,106 +0,0 @@
-diff --git a/tools/polly/CMakeLists.txt b/tools/polly/CMakeLists.txt
-index 9939097f743e..8cc538da912a 100644
---- a/tools/polly/CMakeLists.txt
-+++ b/tools/polly/CMakeLists.txt
-@@ -2,7 +2,11 @@
- if (NOT DEFINED LLVM_MAIN_SRC_DIR)
-   project(Polly)
-   cmake_minimum_required(VERSION 3.4.3)
-+endif()
-+
-+include(GNUInstallDirs)
- 
-+if (NOT DEFINED LLVM_MAIN_SRC_DIR)
-   # Where is LLVM installed?
-   find_package(LLVM CONFIG REQUIRED)
-   set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${LLVM_CMAKE_DIR})
-@@ -145,14 +149,14 @@ include_directories(
- 
- if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-   install(DIRECTORY include/
--    DESTINATION include
-+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-     FILES_MATCHING
-     PATTERN "*.h"
-     PATTERN ".svn" EXCLUDE
-     )
- 
-   install(DIRECTORY ${POLLY_BINARY_DIR}/include/
--    DESTINATION include
-+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-     FILES_MATCHING
-     PATTERN "*.h"
-     PATTERN "CMakeFiles" EXCLUDE
-diff --git a/tools/polly/cmake/CMakeLists.txt b/tools/polly/cmake/CMakeLists.txt
-index 969292cd6b00..d7aea77bdd20 100644
---- a/tools/polly/cmake/CMakeLists.txt
-+++ b/tools/polly/cmake/CMakeLists.txt
-@@ -79,18 +79,18 @@ file(GENERATE
- 
- # Generate PollyConfig.cmake for the install tree.
- unset(POLLY_EXPORTS)
--set(POLLY_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}")
-+set(POLLY_INSTALL_PREFIX "")
- set(POLLY_CONFIG_LLVM_CMAKE_DIR "${LLVM_BINARY_DIR}/${LLVM_INSTALL_PACKAGE_DIR}")
--set(POLLY_CONFIG_CMAKE_DIR "${POLLY_INSTALL_PREFIX}/${POLLY_INSTALL_PACKAGE_DIR}")
--set(POLLY_CONFIG_LIBRARY_DIRS "${POLLY_INSTALL_PREFIX}/lib${LLVM_LIBDIR_SUFFIX}")
-+set(POLLY_CONFIG_CMAKE_DIR "${POLLY_INSTALL_PREFIX}${CMAKE_INSTALL_PREFIX}/${POLLY_INSTALL_PACKAGE_DIR}")
-+set(POLLY_CONFIG_LIBRARY_DIRS "${POLLY_INSTALL_PREFIX}${CMAKE_INSTALL_FULL_LIBDIR}${LLVM_LIBDIR_SUFFIX}")
- if (POLLY_BUNDLED_ISL)
-   set(POLLY_CONFIG_INCLUDE_DIRS
--    "${POLLY_INSTALL_PREFIX}/include"
--    "${POLLY_INSTALL_PREFIX}/include/polly"
-+    "${POLLY_INSTALL_PREFIX}${CMAKE_INSTALL_FULL_LIBDIR}"
-+    "${POLLY_INSTALL_PREFIX}${CMAKE_INSTALL_FULL_LIBDIR}/polly"
-     )
- else()
-   set(POLLY_CONFIG_INCLUDE_DIRS
--    "${POLLY_INSTALL_PREFIX}/include"
-+    "${POLLY_INSTALL_PREFIX}${CMAKE_INSTALL_FULL_INCLUDEDIR}"
-     ${ISL_INCLUDE_DIRS}
-     )
- endif()
-@@ -100,12 +100,12 @@ endif()
- foreach(tgt IN LISTS POLLY_CONFIG_EXPORTED_TARGETS)
-   get_target_property(tgt_type ${tgt} TYPE)
-   if (tgt_type STREQUAL "EXECUTABLE")
--    set(tgt_prefix "bin/")
-+    set(tgt_prefix "${CMAKE_INSTALL_BINDIR}/")
-   else()
--    set(tgt_prefix "lib/")
-+    set(tgt_prefix "${CMAKE_INSTALL_LIBDIR}/")
-   endif()
- 
--  set(tgt_path "${CMAKE_INSTALL_PREFIX}/${tgt_prefix}$<TARGET_FILE_NAME:${tgt}>")
-+  set(tgt_path "${tgt_prefix}$<TARGET_FILE_NAME:${tgt}>")
-   file(RELATIVE_PATH tgt_path ${POLLY_CONFIG_CMAKE_DIR} ${tgt_path})
- 
-   if (NOT tgt_type STREQUAL "INTERFACE_LIBRARY")
-diff --git a/tools/polly/cmake/polly_macros.cmake b/tools/polly/cmake/polly_macros.cmake
-index e48203871884..5bc8a2a52541 100644
---- a/tools/polly/cmake/polly_macros.cmake
-+++ b/tools/polly/cmake/polly_macros.cmake
-@@ -44,8 +44,8 @@ macro(add_polly_library name)
-   if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY OR ${name} STREQUAL "LLVMPolly")
-     install(TARGETS ${name}
-       EXPORT LLVMExports
--      LIBRARY DESTINATION lib${LLVM_LIBDIR_SUFFIX}
--      ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX})
-+	  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}
-+      ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX})
-   endif()
-   set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS ${name})
- endmacro(add_polly_library)
-diff --git a/tools/polly/lib/External/CMakeLists.txt b/tools/polly/lib/External/CMakeLists.txt
-index 8ffd984e542b..261cc19f3238 100644
---- a/tools/polly/lib/External/CMakeLists.txt
-+++ b/tools/polly/lib/External/CMakeLists.txt
-@@ -274,7 +274,7 @@ if (POLLY_BUNDLED_ISL)
-     install(DIRECTORY
-       ${ISL_SOURCE_DIR}/include/
-       ${ISL_BINARY_DIR}/include/
--      DESTINATION include/polly
-+      DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/polly
-       FILES_MATCHING
-       PATTERN "*.h"
-       PATTERN "CMakeFiles" EXCLUDE
diff --git a/pkgs/development/compilers/llvm/7/llvm/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/7/llvm/gnu-install-dirs.patch
deleted file mode 100644
index 7e7921e49ab0..000000000000
--- a/pkgs/development/compilers/llvm/7/llvm/gnu-install-dirs.patch
+++ /dev/null
@@ -1,386 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index a3d3013cedcd..b298d6ef04af 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -275,15 +275,21 @@ if (CMAKE_BUILD_TYPE AND
-   message(FATAL_ERROR "Invalid value for CMAKE_BUILD_TYPE: ${CMAKE_BUILD_TYPE}")
- endif()
- 
-+include(GNUInstallDirs)
-+
- set(LLVM_LIBDIR_SUFFIX "" CACHE STRING "Define suffix of library directory name (32/64)" )
- 
--set(LLVM_TOOLS_INSTALL_DIR "bin" CACHE STRING "Path for binary subdirectory (defaults to 'bin')")
-+set(LLVM_TOOLS_INSTALL_DIR "${CMAKE_INSTALL_BINDIR}" CACHE STRING
-+    "Path for binary subdirectory (defaults to 'bin')")
- mark_as_advanced(LLVM_TOOLS_INSTALL_DIR)
- 
- set(LLVM_UTILS_INSTALL_DIR "${LLVM_TOOLS_INSTALL_DIR}" CACHE STRING
-     "Path to install LLVM utilities (enabled by LLVM_INSTALL_UTILS=ON) (defaults to LLVM_TOOLS_INSTALL_DIR)")
- mark_as_advanced(LLVM_UTILS_INSTALL_DIR)
- 
-+set(LLVM_INSTALL_CMAKE_DIR "${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}/cmake/llvm" CACHE STRING
-+	"Path for CMake subdirectory (defaults to lib/cmake/llvm)" )
-+
- # They are used as destination of target generators.
- set(LLVM_RUNTIME_OUTPUT_INTDIR ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin)
- set(LLVM_LIBRARY_OUTPUT_INTDIR ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
-@@ -531,9 +537,9 @@ option (LLVM_ENABLE_SPHINX "Use Sphinx to generate llvm documentation." OFF)
- option (LLVM_ENABLE_OCAMLDOC "Build OCaml bindings documentation." ON)
- option (LLVM_ENABLE_BINDINGS "Build bindings." ON)
- 
--set(LLVM_INSTALL_DOXYGEN_HTML_DIR "share/doc/llvm/doxygen-html"
-+set(LLVM_INSTALL_DOXYGEN_HTML_DIR "${CMAKE_INSTALL_DOCDIR}/${project}/doxygen-html"
-     CACHE STRING "Doxygen-generated HTML documentation install directory")
--set(LLVM_INSTALL_OCAMLDOC_HTML_DIR "share/doc/llvm/ocaml-html"
-+set(LLVM_INSTALL_OCAMLDOC_HTML_DIR "${CMAKE_INSTALL_DOCDIR}/${project}/ocaml-html"
-     CACHE STRING "OCamldoc-generated HTML documentation install directory")
- 
- option (LLVM_BUILD_EXTERNAL_COMPILER_RT
-@@ -966,7 +972,7 @@ endif()
- 
- if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-   install(DIRECTORY include/llvm include/llvm-c
--    DESTINATION include
-+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-     COMPONENT llvm-headers
-     FILES_MATCHING
-     PATTERN "*.def"
-@@ -978,7 +984,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-     )
- 
-   install(DIRECTORY ${LLVM_INCLUDE_DIR}/llvm ${LLVM_INCLUDE_DIR}/llvm-c
--    DESTINATION include
-+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-     COMPONENT llvm-headers
-     FILES_MATCHING
-     PATTERN "*.def"
-diff --git a/cmake/modules/AddLLVM.cmake b/cmake/modules/AddLLVM.cmake
-index c0f90ba7068d..d656156ff9c8 100644
---- a/cmake/modules/AddLLVM.cmake
-+++ b/cmake/modules/AddLLVM.cmake
-@@ -638,11 +638,11 @@ macro(add_llvm_library name)
-   else()
-     if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY OR ${name} STREQUAL "LTO" OR
-         (LLVM_LINK_LLVM_DYLIB AND ${name} STREQUAL "LLVM"))
--      set(install_dir lib${LLVM_LIBDIR_SUFFIX})
-+      set(install_dir ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX})
-       if(ARG_SHARED OR BUILD_SHARED_LIBS)
-         if(WIN32 OR CYGWIN OR MINGW)
-           set(install_type RUNTIME)
--          set(install_dir bin)
-+          set(install_dir ${CMAKE_INSTALL_BINDIR})
-         else()
-           set(install_type LIBRARY)
-         endif()
-@@ -684,9 +684,9 @@ macro(add_llvm_loadable_module name)
-       if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-         if(WIN32 OR CYGWIN)
-           # DLL platform
--          set(dlldir "bin")
-+          set(dlldir "${CMAKE_INSTALL_BINDIR}")
-         else()
--          set(dlldir "lib${LLVM_LIBDIR_SUFFIX}")
-+          set(dlldir "${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}")
-         endif()
- 
-         if(${name} IN_LIST LLVM_DISTRIBUTION_COMPONENTS OR
-@@ -698,7 +698,7 @@ macro(add_llvm_loadable_module name)
-         install(TARGETS ${name}
-                 ${export_to_llvmexports}
-                 LIBRARY DESTINATION ${dlldir}
--                ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX})
-+                ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX})
-       endif()
-       set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS ${name})
-     endif()
-@@ -912,7 +912,7 @@ macro(add_llvm_example name)
-   endif()
-   add_llvm_executable(${name} ${ARGN})
-   if( LLVM_BUILD_EXAMPLES )
--    install(TARGETS ${name} RUNTIME DESTINATION examples)
-+    install(TARGETS ${name} RUNTIME DESTINATION ${CMAKE_INSTALL_DOCDIR}/examples)
-   endif()
-   set_target_properties(${name} PROPERTIES FOLDER "Examples")
- endmacro(add_llvm_example name)
-@@ -1430,7 +1430,7 @@ function(llvm_install_library_symlink name dest type)
-   set(full_name ${CMAKE_${type}_LIBRARY_PREFIX}${name}${CMAKE_${type}_LIBRARY_SUFFIX})
-   set(full_dest ${CMAKE_${type}_LIBRARY_PREFIX}${dest}${CMAKE_${type}_LIBRARY_SUFFIX})
- 
--  set(output_dir lib${LLVM_LIBDIR_SUFFIX})
-+  set(output_dir ${CMAKE_INSTALL_FULL_LIBDIR}${LLVM_LIBDIR_SUFFIX})
-   if(WIN32 AND "${type}" STREQUAL "SHARED")
-     set(output_dir bin)
-   endif()
-@@ -1446,7 +1446,7 @@ function(llvm_install_library_symlink name dest type)
-   endif()
- endfunction()
- 
--function(llvm_install_symlink name dest)
-+function(llvm_install_symlink name dest output_dir)
-   cmake_parse_arguments(ARG "ALWAYS_GENERATE" "COMPONENT" "" ${ARGN})
-   foreach(path ${CMAKE_MODULE_PATH})
-     if(EXISTS ${path}/LLVMInstallSymlink.cmake)
-@@ -1469,7 +1469,7 @@ function(llvm_install_symlink name dest)
-   set(full_dest ${dest}${CMAKE_EXECUTABLE_SUFFIX})
- 
-   install(SCRIPT ${INSTALL_SYMLINK}
--          CODE "install_symlink(${full_name} ${full_dest} ${LLVM_TOOLS_INSTALL_DIR})"
-+          CODE "install_symlink(${full_name} ${full_dest} ${output_dir})"
-           COMPONENT ${component})
- 
-   if (NOT CMAKE_CONFIGURATION_TYPES AND NOT ARG_ALWAYS_GENERATE)
-@@ -1551,7 +1551,8 @@ function(add_llvm_tool_symlink link_name target)
-     endif()
- 
-     if ((TOOL_IS_TOOLCHAIN OR NOT LLVM_INSTALL_TOOLCHAIN_ONLY) AND LLVM_BUILD_TOOLS)
--      llvm_install_symlink(${link_name} ${target})
-+      GNUInstallDirs_get_absolute_install_dir(output_dir LLVM_TOOLS_INSTALL_DIR)
-+      llvm_install_symlink(${link_name} ${target} ${output_dir})
-     endif()
-   endif()
- endfunction()
-@@ -1635,9 +1636,9 @@ function(llvm_setup_rpath name)
- 
-   if (APPLE)
-     set(_install_name_dir INSTALL_NAME_DIR "@rpath")
--    set(_install_rpath "@loader_path/../lib" ${extra_libdir})
-+    set(_install_rpath "@loader_path/../${CMAKE_INSTALL_LIBDIR}" ${extra_libdir})
-   elseif(UNIX)
--    set(_install_rpath "\$ORIGIN/../lib${LLVM_LIBDIR_SUFFIX}" ${extra_libdir})
-+    set(_install_rpath "\$ORIGIN/../${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}" ${extra_libdir})
-     if(${CMAKE_SYSTEM_NAME} MATCHES "(FreeBSD|DragonFly)")
-       set_property(TARGET ${name} APPEND_STRING PROPERTY
-                    LINK_FLAGS " -Wl,-z,origin ")
-diff --git a/cmake/modules/AddOCaml.cmake b/cmake/modules/AddOCaml.cmake
-index 02bab6846376..eff26adb2efc 100644
---- a/cmake/modules/AddOCaml.cmake
-+++ b/cmake/modules/AddOCaml.cmake
-@@ -140,9 +140,9 @@ function(add_ocaml_library name)
-   endforeach()
- 
-   if( APPLE )
--    set(ocaml_rpath "@executable_path/../../../lib${LLVM_LIBDIR_SUFFIX}")
-+    set(ocaml_rpath "@executable_path/../../../${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}")
-   elseif( UNIX )
--    set(ocaml_rpath "\\$ORIGIN/../../../lib${LLVM_LIBDIR_SUFFIX}")
-+    set(ocaml_rpath "\\$ORIGIN/../../../${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}")
-   endif()
-   list(APPEND ocaml_flags "-ldopt" "-Wl,-rpath,${ocaml_rpath}")
- 
-diff --git a/cmake/modules/AddSphinxTarget.cmake b/cmake/modules/AddSphinxTarget.cmake
-index 22e3dcb776aa..ba77b9c195e2 100644
---- a/cmake/modules/AddSphinxTarget.cmake
-+++ b/cmake/modules/AddSphinxTarget.cmake
-@@ -73,7 +73,7 @@ function (add_sphinx_target builder project)
- 
-       elseif (builder STREQUAL html)
-         string(TOUPPER "${project}" project_upper)
--        set(${project_upper}_INSTALL_SPHINX_HTML_DIR "share/doc/${project}/html"
-+        set(${project_upper}_INSTALL_SPHINX_HTML_DIR "${CMAKE_INSTALL_DOCDIR}/${project}/html"
-             CACHE STRING "HTML documentation install directory for ${project}")
- 
-         # '/.' indicates: copy the contents of the directory directly into
-diff --git a/cmake/modules/CMakeLists.txt b/cmake/modules/CMakeLists.txt
-index 6c316a2f04fb..129c0995059c 100644
---- a/cmake/modules/CMakeLists.txt
-+++ b/cmake/modules/CMakeLists.txt
-@@ -1,4 +1,4 @@
--set(LLVM_INSTALL_PACKAGE_DIR lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm)
-+set(LLVM_INSTALL_PACKAGE_DIR ${LLVM_INSTALL_CMAKE_DIR} CACHE STRING "Path for CMake subdirectory (defaults to 'cmake/llvm')")
- set(llvm_cmake_builddir "${LLVM_BINARY_DIR}/${LLVM_INSTALL_PACKAGE_DIR}")
- 
- # First for users who use an installed LLVM, create the LLVMExports.cmake file.
-@@ -90,11 +90,11 @@ foreach(p ${_count})
-   set(LLVM_CONFIG_CODE "${LLVM_CONFIG_CODE}
- get_filename_component(LLVM_INSTALL_PREFIX \"\${LLVM_INSTALL_PREFIX}\" PATH)")
- endforeach(p)
--set(LLVM_CONFIG_INCLUDE_DIRS "\${LLVM_INSTALL_PREFIX}/include")
--set(LLVM_CONFIG_LIBRARY_DIRS "\${LLVM_INSTALL_PREFIX}/lib\${LLVM_LIBDIR_SUFFIX}")
-+set(LLVM_CONFIG_INCLUDE_DIRS "\${LLVM_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}")
-+set(LLVM_CONFIG_LIBRARY_DIRS "\${LLVM_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}\${LLVM_LIBDIR_SUFFIX}")
- set(LLVM_CONFIG_CMAKE_DIR "\${LLVM_INSTALL_PREFIX}/${LLVM_INSTALL_PACKAGE_DIR}")
- set(LLVM_CONFIG_BINARY_DIR "\${LLVM_INSTALL_PREFIX}")
--set(LLVM_CONFIG_TOOLS_BINARY_DIR "\${LLVM_INSTALL_PREFIX}/bin")
-+set(LLVM_CONFIG_TOOLS_BINARY_DIR "\${LLVM_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}")
- set(LLVM_CONFIG_EXPORTS_FILE "\${LLVM_CMAKE_DIR}/LLVMExports.cmake")
- set(LLVM_CONFIG_EXPORTS "${LLVM_EXPORTS}")
- configure_file(
-diff --git a/cmake/modules/LLVMInstallSymlink.cmake b/cmake/modules/LLVMInstallSymlink.cmake
-index 1a04de931ff7..1c5ea4200635 100644
---- a/cmake/modules/LLVMInstallSymlink.cmake
-+++ b/cmake/modules/LLVMInstallSymlink.cmake
-@@ -10,7 +10,7 @@ function(install_symlink name target outdir)
-     set(LINK_OR_COPY copy)
-   endif()
- 
--  set(bindir "${DESTDIR}${CMAKE_INSTALL_PREFIX}/${outdir}/")
-+  set(bindir "${DESTDIR}${outdir}/")
- 
-   message("Creating ${name}")
- 
-diff --git a/docs/CMake.rst b/docs/CMake.rst
-index cbcadc212498..a3da96546f43 100644
---- a/docs/CMake.rst
-+++ b/docs/CMake.rst
-@@ -196,7 +196,7 @@ CMake manual, or execute ``cmake --help-variable VARIABLE_NAME``.
- **LLVM_LIBDIR_SUFFIX**:STRING
-   Extra suffix to append to the directory where libraries are to be
-   installed. On a 64-bit architecture, one could use ``-DLLVM_LIBDIR_SUFFIX=64``
--  to install libraries to ``/usr/lib64``.
-+  to install libraries to ``/usr/lib64``. See also ``CMAKE_INSTALL_LIBDIR``.
- 
- **CMAKE_C_FLAGS**:STRING
-   Extra flags to use when compiling C source files.
-@@ -473,8 +473,8 @@ LLVM-specific variables
- 
- **LLVM_INSTALL_DOXYGEN_HTML_DIR**:STRING
-   The path to install Doxygen-generated HTML documentation to. This path can
--  either be absolute or relative to the CMAKE_INSTALL_PREFIX. Defaults to
--  `share/doc/llvm/doxygen-html`.
-+  either be absolute or relative to the ``CMAKE_INSTALL_PREFIX``. Defaults to
-+  `${CMAKE_INSTALL_DOCDIR}/${project}/doxygen-html`.
- 
- **LLVM_ENABLE_SPHINX**:BOOL
-   If specified, CMake will search for the ``sphinx-build`` executable and will make
-@@ -505,13 +505,33 @@ LLVM-specific variables
- 
- **LLVM_INSTALL_SPHINX_HTML_DIR**:STRING
-   The path to install Sphinx-generated HTML documentation to. This path can
--  either be absolute or relative to the CMAKE_INSTALL_PREFIX. Defaults to
--  `share/doc/llvm/html`.
-+  either be absolute or relative to the ``CMAKE_INSTALL_PREFIX``. Defaults to
-+  `${CMAKE_INSTALL_DOCDIR}/${project}/html`.
- 
- **LLVM_INSTALL_OCAMLDOC_HTML_DIR**:STRING
-   The path to install OCamldoc-generated HTML documentation to. This path can
--  either be absolute or relative to the CMAKE_INSTALL_PREFIX. Defaults to
--  `share/doc/llvm/ocaml-html`.
-+  either be absolute or relative to the ``CMAKE_INSTALL_PREFIX``. Defaults to
-+  `${CMAKE_INSTALL_DOCDIR}/${project}/ocaml-html`.
-+
-+**CMAKE_INSTALL_BINDIR**:STRING
-+  The path to install binary tools, relative to the ``CMAKE_INSTALL_PREFIX``.
-+  Defaults to `bin`.
-+
-+**CMAKE_INSTALL_LIBDIR**:STRING
-+  The path to install libraries, relative to the ``CMAKE_INSTALL_PREFIX``.
-+  Defaults to `lib`.
-+
-+**CMAKE_INSTALL_INCLUDEDIR**:STRING
-+  The path to install header files, relative to the ``CMAKE_INSTALL_PREFIX``.
-+  Defaults to `include`.
-+
-+**CMAKE_INSTALL_DOCDIR**:STRING
-+  The path to install documentation, relative to the ``CMAKE_INSTALL_PREFIX``.
-+  Defaults to `share/doc`.
-+
-+**CMAKE_INSTALL_MANDIR**:STRING
-+  The path to install manpage files, relative to the ``CMAKE_INSTALL_PREFIX``.
-+  Defaults to `share/man`.
- 
- **LLVM_CREATE_XCODE_TOOLCHAIN**:BOOL
-   OS X Only: If enabled CMake will generate a target named
-@@ -676,9 +696,11 @@ the ``cmake`` command or by setting it directly in ``ccmake`` or ``cmake-gui``).
- 
- This file is available in two different locations.
- 
--* ``<INSTALL_PREFIX>/lib/cmake/llvm/LLVMConfig.cmake`` where
--  ``<INSTALL_PREFIX>`` is the install prefix of an installed version of LLVM.
--  On Linux typically this is ``/usr/lib/cmake/llvm/LLVMConfig.cmake``.
-+* ``<LLVM_INSTALL_PACKAGE_DIR>LLVMConfig.cmake`` where
-+  ``<LLVM_INSTALL_PACKAGE_DIR>`` is the location where LLVM CMake modules are
-+  installed as part of an installed version of LLVM. This is typically
-+  ``cmake/llvm/`` within the lib directory. On Linux, this is typically
-+  ``/usr/lib/cmake/llvm/LLVMConfig.cmake``.
- 
- * ``<LLVM_BUILD_ROOT>/lib/cmake/llvm/LLVMConfig.cmake`` where
-   ``<LLVM_BUILD_ROOT>`` is the root of the LLVM build tree. **Note: this is only
-diff --git a/include/llvm/CMakeLists.txt b/include/llvm/CMakeLists.txt
-index 1d5ca3ba92b0..026f5453c1da 100644
---- a/include/llvm/CMakeLists.txt
-+++ b/include/llvm/CMakeLists.txt
-@@ -4,5 +4,5 @@ add_subdirectory(Support)
- # If we're doing an out-of-tree build, copy a module map for generated
- # header files into the build area.
- if (NOT "${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
--  configure_file(module.modulemap.build module.modulemap COPYONLY)
-+  configure_file(module.modulemap.build ${LLVM_INCLUDE_DIR}/module.modulemap COPYONLY)
- endif (NOT "${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
-diff --git a/tools/llvm-config/BuildVariables.inc.in b/tools/llvm-config/BuildVariables.inc.in
-index f201e1f7bff0..4582ed556a02 100644
---- a/tools/llvm-config/BuildVariables.inc.in
-+++ b/tools/llvm-config/BuildVariables.inc.in
-@@ -24,6 +24,10 @@
- #define LLVM_CXXFLAGS "@LLVM_CXXFLAGS@"
- #define LLVM_BUILDMODE "@LLVM_BUILDMODE@"
- #define LLVM_LIBDIR_SUFFIX "@LLVM_LIBDIR_SUFFIX@"
-+#define LLVM_INSTALL_BINDIR "@CMAKE_INSTALL_BINDIR@"
-+#define LLVM_INSTALL_LIBDIR "@CMAKE_INSTALL_LIBDIR@"
-+#define LLVM_INSTALL_INCLUDEDIR "@CMAKE_INSTALL_INCLUDEDIR@"
-+#define LLVM_INSTALL_CMAKEDIR "@LLVM_INSTALL_CMAKE_DIR@"
- #define LLVM_TARGETS_BUILT "@LLVM_TARGETS_BUILT@"
- #define LLVM_SYSTEM_LIBS "@LLVM_SYSTEM_LIBS@"
- #define LLVM_BUILD_SYSTEM "@LLVM_BUILD_SYSTEM@"
-diff --git a/tools/llvm-config/llvm-config.cpp b/tools/llvm-config/llvm-config.cpp
-index 892adc3b9dd8..cabe7fcc630f 100644
---- a/tools/llvm-config/llvm-config.cpp
-+++ b/tools/llvm-config/llvm-config.cpp
-@@ -333,12 +333,26 @@ int main(int argc, char **argv) {
-         ("-I" + ActiveIncludeDir + " " + "-I" + ActiveObjRoot + "/include");
-   } else {
-     ActivePrefix = CurrentExecPrefix;
--    ActiveIncludeDir = ActivePrefix + "/include";
--    SmallString<256> path(StringRef(LLVM_TOOLS_INSTALL_DIR));
--    sys::fs::make_absolute(ActivePrefix, path);
--    ActiveBinDir = path.str();
--    ActiveLibDir = ActivePrefix + "/lib" + LLVM_LIBDIR_SUFFIX;
--    ActiveCMakeDir = ActiveLibDir + "/cmake/llvm";
-+    {
-+      SmallString<256> path(StringRef(LLVM_INSTALL_INCLUDEDIR));
-+      sys::fs::make_absolute(ActivePrefix, path);
-+      ActiveIncludeDir = std::string(path.str());
-+    }
-+    {
-+      SmallString<256> path(StringRef(LLVM_INSTALL_BINDIR));
-+      sys::fs::make_absolute(ActivePrefix, path);
-+      ActiveBinDir = std::string(path.str());
-+    }
-+    {
-+      SmallString<256> path(StringRef(LLVM_INSTALL_LIBDIR LLVM_LIBDIR_SUFFIX));
-+      sys::fs::make_absolute(ActivePrefix, path);
-+      ActiveLibDir = std::string(path.str());
-+    }
-+    {
-+      SmallString<256> path(StringRef(LLVM_INSTALL_CMAKEDIR));
-+      sys::fs::make_absolute(ActivePrefix, path);
-+      ActiveCMakeDir = std::string(path.str());
-+    }
-     ActiveIncludeOption = "-I" + ActiveIncludeDir;
-   }
- 
-diff --git a/tools/lto/CMakeLists.txt b/tools/lto/CMakeLists.txt
-index 6e913519a809..85641eef721f 100644
---- a/tools/lto/CMakeLists.txt
-+++ b/tools/lto/CMakeLists.txt
-@@ -19,7 +19,7 @@ set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_CURRENT_SOURCE_DIR}/lto.exports)
- add_llvm_library(LTO SHARED ${SOURCES} DEPENDS intrinsics_gen)
- 
- install(FILES ${LLVM_MAIN_INCLUDE_DIR}/llvm-c/lto.h
--  DESTINATION include/llvm-c
-+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/llvm-c
-   COMPONENT LTO)
- 
- if (APPLE)
-diff --git a/tools/opt-viewer/CMakeLists.txt b/tools/opt-viewer/CMakeLists.txt
-index 19b606933082..27b9f71b3d79 100644
---- a/tools/opt-viewer/CMakeLists.txt
-+++ b/tools/opt-viewer/CMakeLists.txt
-@@ -8,6 +8,6 @@ set (files
- 
- foreach (file ${files})
-   install(PROGRAMS ${file}
--    DESTINATION share/opt-viewer
-+    DESTINATION ${CMAKE_INSTALL_DATADIR}/opt-viewer
-     COMPONENT opt-viewer)
- endforeach (file)
diff --git a/pkgs/development/compilers/llvm/7/openmp/default.nix b/pkgs/development/compilers/llvm/7/openmp/default.nix
deleted file mode 100644
index a87dd319d8ec..000000000000
--- a/pkgs/development/compilers/llvm/7/openmp/default.nix
+++ /dev/null
@@ -1,37 +0,0 @@
-{ lib
-, stdenv
-, llvm_meta
-, fetch
-, cmake
-, llvm
-, targetLlvm
-, perl
-, version
-}:
-
-stdenv.mkDerivation {
-  pname = "openmp";
-  inherit version;
-
-  src = fetch "openmp" "1dg53wzsci2kra8lh1y0chh60h2l8h1by93br5spzvzlxshkmrqy";
-
-  nativeBuildInputs = [ cmake perl ];
-  buildInputs = [
-    (if stdenv.buildPlatform == stdenv.hostPlatform then llvm else targetLlvm)
-  ];
-
-  meta = llvm_meta // {
-    homepage = "https://openmp.llvm.org/";
-    description = "Support for the OpenMP language";
-    longDescription = ''
-      The OpenMP subproject of LLVM contains the components required to build an
-      executable OpenMP program that are outside the compiler itself.
-      Contains the code for the runtime library against which code compiled by
-      "clang -fopenmp" must be linked before it can run and the library that
-      supports offload to target devices.
-    '';
-    # "All of the code is dual licensed under the MIT license and the UIUC
-    # License (a BSD-like license)":
-    license = with lib.licenses; [ mit ncsa ];
-  };
-}
diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix
deleted file mode 100644
index 893d5f398ab7..000000000000
--- a/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix
+++ /dev/null
@@ -1,195 +0,0 @@
-{ pkgs, haskellLib }:
-
-with haskellLib;
-
-let
-  inherit (pkgs.stdenv.hostPlatform) isDarwin;
-in
-
-self: super: {
-
-  llvmPackages = pkgs.lib.dontRecurseIntoAttrs self.ghc.llvmPackages;
-
-  # Disable GHC 8.8.x core libraries.
-  array = null;
-  base = null;
-  binary = null;
-  bytestring = null;
-  Cabal = null;
-  containers = null;
-  deepseq = null;
-  directory = null;
-  filepath = null;
-  ghc-boot = null;
-  ghc-boot-th = null;
-  ghc-compact = null;
-  ghc-heap = null;
-  ghc-prim = null;
-  ghci = null;
-  haskeline = null;
-  hpc = null;
-  integer-gmp = null;
-  libiserv = null;
-  mtl = null;
-  parsec = null;
-  pretty = null;
-  process = null;
-  rts = null;
-  stm = null;
-  template-haskell = null;
-  # GHC only builds terminfo if it is a native compiler
-  terminfo = if pkgs.stdenv.hostPlatform == pkgs.stdenv.buildPlatform then null else self.terminfo_0_4_1_6;
-  text = null;
-  time = null;
-  transformers = null;
-  unix = null;
-  # GHC only bundles the xhtml library if haddock is enabled, check if this is
-  # still the case when updating: https://gitlab.haskell.org/ghc/ghc/-/blob/0198841877f6f04269d6050892b98b5c3807ce4c/ghc.mk#L463
-  xhtml = if self.ghc.hasHaddock or true then null else self.xhtml_3000_3_0_0;
-  # These core package only exist for GHC >= 9.4. The best we can do is feign
-  # their existence to callPackages, but their is no shim for lower GHC versions.
-  system-cxx-std-lib = null;
-
-  # Need the Cabal-syntax-3.6.0.0 fake package for Cabal < 3.8 to allow callPackage and the constraint solver to work
-  Cabal-syntax = self.Cabal-syntax_3_6_0_0;
-
-  # GHC 8.8.x can build haddock version 2.23.*
-  haddock = self.haddock_2_23_1;
-  haddock-api = self.haddock-api_2_23_1;
-
-  # This build needs a newer version of Cabal.
-  cabal2spec = super.cabal2spec.override { Cabal = self.Cabal_3_2_1_0; };
-
-  # Additionally depends on OneTuple for GHC < 9.0
-  base-compat-batteries = addBuildDepend self.OneTuple super.base-compat-batteries;
-
-  # For GHC < 9.4, some packages need data-array-byte as an extra dependency
-  primitive = addBuildDepends [ self.data-array-byte ] super.primitive;
-  hashable = addBuildDepends [
-    self.data-array-byte
-    self.base-orphans
-  ] super.hashable;
-
-  # Ignore overly restrictive upper version bounds.
-  aeson-diff = doJailbreak super.aeson-diff;
-  async = doJailbreak super.async;
-  ChasingBottoms = doJailbreak super.ChasingBottoms;
-  chell = doJailbreak super.chell;
-  Diff = dontCheck super.Diff;
-  doctest = overrideCabal (drv: {
-    jailbreak = true;
-    # The test case relies on the Printf module which did not exist in base 4.13
-    testFlags = drv.testFlags or [ ] ++ [
-      "--skip=/Main/doctest (regression tests)/template-haskell-bugfix/"
-    ];
-  }) super.doctest;
-  hashable-time = doJailbreak super.hashable-time;
-  hledger-lib = doJailbreak super.hledger-lib;  # base >=4.8 && <4.13, easytest >=0.2.1 && <0.3
-  integer-logarithms = doJailbreak super.integer-logarithms;
-  lucid = doJailbreak super.lucid;
-  parallel = doJailbreak super.parallel;
-  setlocale = doJailbreak super.setlocale;
-  split = doJailbreak super.split;
-  system-fileio = doJailbreak super.system-fileio;
-  tasty-expected-failure = doJailbreak super.tasty-expected-failure;
-  tasty-hedgehog = doJailbreak super.tasty-hedgehog;
-  test-framework = doJailbreak super.test-framework;
-  th-expand-syns = doJailbreak super.th-expand-syns;
-  # TODO: remove when upstream accepts https://github.com/snapframework/io-streams-haproxy/pull/17
-  io-streams-haproxy = doJailbreak super.io-streams-haproxy; # base >=4.5 && <4.13
-  snap-server = doJailbreak super.snap-server;
-  exact-pi = doJailbreak super.exact-pi;
-  time-compat = doJailbreak super.time-compat;
-  http-media = unmarkBroken (doJailbreak super.http-media);
-  servant-server = unmarkBroken (doJailbreak super.servant-server);
-  basement = doDistribute self.basement_0_0_14;
-  foundation = doDistribute (dontCheck self.foundation_0_0_28);
-  vault = dontHaddock super.vault;
-
-  # https://github.com/snapframework/snap-core/issues/288
-  snap-core = overrideCabal (drv: { prePatch = "substituteInPlace src/Snap/Internal/Core.hs --replace 'fail   = Fail.fail' ''"; }) super.snap-core;
-
-  # Upstream ships a broken Setup.hs file.
-  csv = overrideCabal (drv: { prePatch = "rm Setup.hs"; }) super.csv;
-
-  # https://github.com/kowainik/relude/issues/241
-  relude = dontCheck super.relude;
-
-  # The current version 2.14.2 does not compile with ghc-8.8.x or newer because
-  # of issues with Cabal 3.x.
-  darcs = dontDistribute super.darcs;
-
-  # liquidhaskell does not support ghc version 8.8.x.
-  liquid = markBroken super.liquid;
-  liquid-base = markBroken super.liquid-base;
-  liquid-bytestring = markBroken super.liquid-bytestring;
-  liquid-containers = markBroken super.liquid-containers;
-  liquid-ghc-prim = markBroken super.liquid-ghc-prim;
-  liquid-parallel = markBroken super.liquid-parallel;
-  liquid-platform = markBroken super.liquid-platform;
-  liquid-prelude = markBroken super.liquid-prelude;
-  liquid-vector = markBroken super.liquid-vector;
-  liquidhaskell = markBroken super.liquidhaskell;
-
-  # This became a core library in ghc 8.10., so we don’t have an "exception" attribute anymore.
-  exceptions = super.exceptions_0_10_7;
-
-  ormolu = super.ormolu_0_2_0_0;
-
-  ghc-api-compat = doDistribute (unmarkBroken super.ghc-api-compat_8_6);
-
-  mime-string = disableOptimization super.mime-string;
-
-  haskell-language-server =  throw "haskell-language-server dropped support for ghc 8.8 in version 1.9.0.0 please use a newer ghc version or an older nixpkgs version";
-
-  hlint = self.hlint_3_2_8;
-
-  ghc-lib-parser = doDistribute self.ghc-lib-parser_8_10_7_20220219;
-  ghc-lib = doDistribute self.ghc-lib_8_10_7_20220219;
-
-  # ghc versions which don’t match the ghc-lib-parser-ex version need the
-  # additional dependency to compile successfully.
-  ghc-lib-parser-ex = doDistribute (addBuildDepend self.ghc-lib-parser self.ghc-lib-parser-ex_8_10_0_24);
-
-  # has a restrictive lower bound on Cabal
-  fourmolu = doJailbreak super.fourmolu;
-
-  # Overly-strict bounds introducted by a revision in version 0.3.2.
-  text-metrics = doJailbreak super.text-metrics;
-
-  # OneTuple needs hashable (instead of ghc-prim) and foldable1-classes-compat for GHC < 9
-  OneTuple = addBuildDepends [
-    self.foldable1-classes-compat
-  ] (super.OneTuple.override {
-    ghc-prim = self.hashable;
-  });
-
-  # Temporarily disabled blaze-textual for GHC >= 9.0 causing hackage2nix ignoring it
-  # https://github.com/paul-rouse/mysql-simple/blob/872604f87044ff6d1a240d9819a16c2bdf4ed8f5/Database/MySQL/Internal/Blaze.hs#L4-L10
-  mysql-simple = addBuildDepends [
-    self.blaze-textual
-  ] super.mysql-simple;
-
-  # https://github.com/fpco/inline-c/issues/127 (recommend to upgrade to Nixpkgs GHC >=9.0)
-  inline-c-cpp = (if isDarwin then dontCheck else x: x) super.inline-c-cpp;
-
-  # Depends on OneTuple for GHC < 9.0
-  universe-base = addBuildDepends [ self.OneTuple ] super.universe-base;
-
-  # doctest-parallel dependency requires newer Cabal
-  regex-tdfa = dontCheck super.regex-tdfa;
-
-  # Unnecessarily strict lower bound on base
-  # https://github.com/mrkkrp/megaparsec/pull/485#issuecomment-1250051823
-  megaparsec = doJailbreak super.megaparsec;
-
-  # Needs OneTuple for ghc < 9.2
-  binary-orphans = addBuildDepends [ self.OneTuple ] super.binary-orphans;
-
-  # Later versions only support GHC >= 9.2
-  ghc-exactprint = self.ghc-exactprint_0_6_4;
-  apply-refact = self.apply-refact_0_9_3_0;
-
-  # Requires GHC < 9.4
-  ghc-source-gen = doDistribute (unmarkBroken super.ghc-source-gen);
-}
diff --git a/pkgs/test/default.nix b/pkgs/test/default.nix
index 9543e165a805..29dc4b5192ec 100644
--- a/pkgs/test/default.nix
+++ b/pkgs/test/default.nix
@@ -63,12 +63,8 @@ with pkgs;
 
             # libcxxStdenv broken
             # fix in https://github.com/NixOS/nixpkgs/pull/216273
-          ] ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
-            # libcxx does not build for some reason on aarch64-linux
-            (filterAttrs (n: _: n != "llvmPackages_7"))
           ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
             (filterAttrs (n: _: n != "llvmPackages_6"))
-            (filterAttrs (n: _: n != "llvmPackages_7"))
             (filterAttrs (n: _: n != "llvmPackages_8"))
             (filterAttrs (n: _: n != "llvmPackages_9"))
             (filterAttrs (n: _: n != "llvmPackages_10"))
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index e655c34c7e82..a0124b0089c3 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -164,7 +164,7 @@ mapAliases ({
 
   # these are for convenience, not for backward compat and shouldn't expire
   clang6Stdenv = lowPrio llvmPackages_6.stdenv;
-  clang7Stdenv = lowPrio llvmPackages_7.stdenv;
+  clang7Stdenv = throw "clang7Stdenv has been removed from nixpkgs"; # Added 2023-11-19
   clang8Stdenv = lowPrio llvmPackages_8.stdenv;
   clang9Stdenv = lowPrio llvmPackages_9.stdenv;
   clang10Stdenv = lowPrio llvmPackages_10.stdenv;
@@ -175,6 +175,9 @@ mapAliases ({
   clang15Stdenv = lowPrio llvmPackages_15.stdenv;
   clang16Stdenv = lowPrio llvmPackages_16.stdenv;
 
+  clang-tools_7  = throw "clang-tools_7 has been removed from nixpkgs"; # Added 2023-11-19
+  clang_7  = throw "clang_7 has been removed from nixpkgs"; # Added 2023-11-19
+
   ### D ###
 
   dagger = throw "'dagger' has been removed from nixpkgs, as the trademark policy of the upstream project is incompatible"; # Added 2023-10-16
@@ -559,6 +562,10 @@ mapAliases ({
   '';
   linux_latest_hardened = linuxPackages_latest_hardened;
 
+  lld_7 = throw "lld_7 has been removed from nixpkgs"; # Added 2023-11-19
+  lldb_7 = throw "lldb_7 has been removed from nixpkgs"; # Added 2023-11-19
+  llvmPackages_7 = throw "llvmPackages_7 has been removed from nixpkgs"; # Added 2023-11-19
+  llvm_7 = throw "llvm_7 has been removed from nixpkgs"; # Added 2023-11-19
 
   lobster-two = google-fonts; # Added 2021-07-22
   luxcorerender = throw "'luxcorerender' has been removed as it's unmaintained and broken in nixpkgs since a while ago"; # Added 2023-06-07
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 7fdf8cbed789..88f52b6a3bfc 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7238,7 +7238,7 @@ with pkgs;
   compass = callPackage ../development/tools/compass { };
 
   cone = callPackage ../development/compilers/cone {
-    llvmPackages = llvmPackages_7;
+    llvmPackages = llvmPackages_13;
   };
 
   conda = callPackage ../tools/package-management/conda { };
@@ -15648,7 +15648,6 @@ with pkgs;
 
   clang = llvmPackages.clang;
   clang_6  = llvmPackages_6.clang;
-  clang_7  = llvmPackages_7.clang;
   clang_8  = llvmPackages_8.clang;
   clang_9  = llvmPackages_9.clang;
   clang_10 = llvmPackages_10.clang;
@@ -15667,10 +15666,6 @@ with pkgs;
     llvmPackages = llvmPackages_6;
   };
 
-  clang-tools_7 = callPackage ../development/tools/clang-tools {
-    llvmPackages = llvmPackages_7;
-  };
-
   clang-tools_8 = callPackage ../development/tools/clang-tools {
     llvmPackages = llvmPackages_8;
   };
@@ -16600,7 +16595,6 @@ with pkgs;
 
   lld = llvmPackages.lld;
   lld_6 = llvmPackages_6.lld;
-  lld_7 = llvmPackages_7.lld;
   lld_8 = llvmPackages_8.lld;
   lld_9 = llvmPackages_9.lld;
   lld_10 = llvmPackages_10.lld;
@@ -16613,7 +16607,6 @@ with pkgs;
 
   lldb = lldb_14;
   lldb_6 = llvmPackages_6.lldb;
-  lldb_7 = llvmPackages_7.lldb;
   lldb_8 = llvmPackages_8.lldb;
   lldb_9 = llvmPackages_9.lldb;
   lldb_10 = llvmPackages_10.lldb;
@@ -16626,7 +16619,6 @@ with pkgs;
 
   llvm = llvmPackages.llvm;
   llvm_6  = llvmPackages_6.llvm;
-  llvm_7  = llvmPackages_7.llvm;
   llvm_8  = llvmPackages_8.llvm;
   llvm_9  = llvmPackages_9.llvm;
   llvm_10 = llvmPackages_10.llvm;
@@ -16664,13 +16656,6 @@ with pkgs;
     targetLlvmLibraries = targetPackages.llvmPackages_6.libraries or llvmPackages_6.libraries;
   });
 
-  llvmPackages_7 = recurseIntoAttrs (callPackage ../development/compilers/llvm/7 {
-    inherit (stdenvAdapters) overrideCC;
-    buildLlvmTools = buildPackages.llvmPackages_7.tools;
-    targetLlvm = targetPackages.llvmPackages_7.llvm or llvmPackages_7.llvm;
-    targetLlvmLibraries = targetPackages.llvmPackages_7.libraries or llvmPackages_7.libraries;
-  });
-
   llvmPackages_8 = recurseIntoAttrs (callPackage ../development/compilers/llvm/8 {
     inherit (stdenvAdapters) overrideCC;
     buildLlvmTools = buildPackages.llvmPackages_8.tools;
@@ -17749,9 +17734,7 @@ with pkgs;
 
   ### End of CuboCore
 
-  maude = callPackage ../development/interpreters/maude {
-    stdenv = if stdenv.cc.isClang then llvmPackages_7.stdenv else stdenv;
-  };
+  maude = callPackage ../development/interpreters/maude { };
 
   me_cleaner = callPackage ../tools/misc/me_cleaner { };
 
@@ -40032,7 +40015,6 @@ with pkgs;
 
   root5 = lowPrio (callPackage ../applications/science/misc/root/5.nix {
     inherit (darwin.apple_sdk.frameworks) Cocoa OpenGL;
-    stdenv = if stdenv.cc.isClang then llvmPackages_7.stdenv else stdenv;
   });
 
   rinetd = callPackage ../servers/rinetd { };
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index b8f11100d39c..44ff6a6dd59e 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -65,7 +65,8 @@ in {
 
   compiler = {
     ghc865Binary = callPackage ../development/compilers/ghc/8.6.5-binary.nix {
-      llvmPackages = pkgs.llvmPackages_6;
+      # Should be llvmPackages_6 which has been removed from nixpkgs
+      llvmPackages = null;
     };
 
     ghc8102Binary = callPackage ../development/compilers/ghc/8.10.2-binary.nix {
@@ -80,20 +81,6 @@ in {
       llvmPackages = pkgs.llvmPackages_12;
     };
 
-    ghc884 = callPackage ../development/compilers/ghc/8.8.4.nix {
-      bootPkgs =
-        # aarch64 ghc865Binary gets SEGVs due to haskell#15449 or similar
-        # 8.10.2 is needed as using 8.10.7 is broken due to RTS-incompatibilities
-        # Musl bindists do not exist for ghc 8.6.5, so we use 8.10.* for them
-        if stdenv.hostPlatform.isAarch64 || stdenv.hostPlatform.isMusl then
-          packages.ghc8102Binary
-        else
-          packages.ghc865Binary;
-      inherit (buildPackages.python3Packages) sphinx;
-      buildTargetLlvmPackages = pkgsBuildTarget.llvmPackages_7;
-      llvmPackages = pkgs.llvmPackages_7;
-    };
-    ghc88 = compiler.ghc884;
     ghc8107 = callPackage ../development/compilers/ghc/8.10.7.nix {
       bootPkgs =
         # the oldest ghc with aarch64-darwin support is 8.10.5
@@ -484,12 +471,6 @@ in {
       compilerConfig = callPackage ../development/haskell-modules/configuration-ghc-9.2.x.nix { };
       packageSetConfig = bootstrapPackageSet;
     };
-    ghc884 = callPackage ../development/haskell-modules {
-      buildHaskellPackages = bh.packages.ghc884;
-      ghc = bh.compiler.ghc884;
-      compilerConfig = callPackage ../development/haskell-modules/configuration-ghc-8.8.x.nix { };
-    };
-    ghc88 = packages.ghc884;
     ghc8107 = callPackage ../development/haskell-modules {
       buildHaskellPackages = bh.packages.ghc8107;
       ghc = bh.compiler.ghc8107;
diff --git a/pkgs/top-level/release-haskell.nix b/pkgs/top-level/release-haskell.nix
index 39ea843bcea2..f1b5645e52b6 100644
--- a/pkgs/top-level/release-haskell.nix
+++ b/pkgs/top-level/release-haskell.nix
@@ -60,7 +60,6 @@ let
 
   # list of all compilers to test specific packages on
   released = with compilerNames; [
-    ghc884
     ghc8107
     ghc902
     ghc924
@@ -390,10 +389,6 @@ let
 
           ghcjs = {};
           ghcjs810 = {};
-
-          # Can't be built with musl, see meta.broken comment in the drv
-          integer-simple.ghc884 = {};
-          integer-simple.ghc88 = {};
         };
 
       # Get some cache going for MUSL-enabled GHC.
@@ -501,8 +496,6 @@ let
       ] released;
       funcmp = released;
       haskell-language-server = lib.subtractLists [
-        # Support ceased as of 1.9.0.0
-        compilerNames.ghc884
         # Support ceased as of 2.3.0.0
         compilerNames.ghc8107
         # Not yet supported
@@ -534,12 +527,10 @@ let
         compilerNames.ghc981
       ] released;
       ghc-api-compat = [
-        compilerNames.ghc884
         compilerNames.ghc8107
         compilerNames.ghc902
       ];
       ghc-bignum = [
-        compilerNames.ghc884
         compilerNames.ghc8107
       ];
       ghc-lib = lib.subtractLists [
@@ -554,13 +545,11 @@ let
       ghc-source-gen = [
         # Feel free to remove these as they break,
         # ghc-source-gen currently doesn't support GHC 9.4
-        compilerNames.ghc884
         compilerNames.ghc8107
         compilerNames.ghc902
         compilerNames.ghc928
       ];
       ghc-tags = lib.subtractLists [
-        compilerNames.ghc884
         compilerNames.ghc981
       ] released;
       hashable = lib.subtractLists [
@@ -653,7 +642,6 @@ let
         constituents = accumulateDerivations [
           jobs.pkgsMusl.haskell.compiler.ghc8102Binary
           jobs.pkgsMusl.haskell.compiler.ghc8107Binary
-          jobs.pkgsMusl.haskell.compiler.ghc884
           jobs.pkgsMusl.haskell.compiler.ghc8107
           jobs.pkgsMusl.haskell.compiler.ghc902
           jobs.pkgsMusl.haskell.compiler.ghc924