From c2ebb395cadfd081c015f7da5034b12c145bf6bc Mon Sep 17 00:00:00 2001
From: Atemu <atemu.main@gmail.com>
Date: Thu, 23 Feb 2023 18:42:52 +0100
Subject: mesa: refactor for multi-version setup

---
 pkgs/development/libraries/mesa/22.nix      |   4 +
 pkgs/development/libraries/mesa/default.nix | 367 ---------------------------
 pkgs/development/libraries/mesa/generic.nix | 369 ++++++++++++++++++++++++++++
 3 files changed, 373 insertions(+), 367 deletions(-)
 create mode 100644 pkgs/development/libraries/mesa/22.nix
 delete mode 100644 pkgs/development/libraries/mesa/default.nix
 create mode 100644 pkgs/development/libraries/mesa/generic.nix

(limited to 'pkgs/development/libraries/mesa')

diff --git a/pkgs/development/libraries/mesa/22.nix b/pkgs/development/libraries/mesa/22.nix
new file mode 100644
index 00000000000..1a1127dae50
--- /dev/null
+++ b/pkgs/development/libraries/mesa/22.nix
@@ -0,0 +1,4 @@
+import ./generic.nix {
+  version = "22.3.7";
+  hash = "sha256-iUzi9KHC52F3zdIoRiAZLQ2jBmskPuwvux18838TBCw=";
+}
diff --git a/pkgs/development/libraries/mesa/default.nix b/pkgs/development/libraries/mesa/default.nix
deleted file mode 100644
index 83643e423f7..00000000000
--- a/pkgs/development/libraries/mesa/default.nix
+++ /dev/null
@@ -1,367 +0,0 @@
-{ stdenv, lib, fetchurl
-, meson, pkg-config, ninja
-, intltool, bison, flex, file, python3Packages, wayland-scanner
-, expat, libdrm, xorg, wayland, wayland-protocols, openssl
-, llvmPackages, libffi, libomxil-bellagio, libva-minimal
-, libelf, libvdpau
-, libglvnd, libunwind
-, vulkan-loader, glslang
-, galliumDrivers ?
-  if stdenv.isLinux then
-    [
-      "d3d12" # WSL emulated GPU (aka Dozen)
-      "kmsro" # helper driver for display-only devices
-      "nouveau" # Nvidia
-      "radeonsi" # new AMD (GCN+)
-      "r300" # very old AMD
-      "r600" # less old AMD
-      "swrast" # software renderer (aka LLVMPipe)
-      "svga" # VMWare virtualized GPU
-      "virgl" # QEMU virtualized GPU (aka VirGL)
-      "zink" # generic OpenGL over Vulkan, experimental
-    ]
-    ++ lib.optionals stdenv.isAarch64 [
-      "etnaviv" # Vivante GPU designs (mostly NXP/Marvell SoCs)
-      "freedreno" # Qualcomm Adreno (all Qualcomm SoCs)
-      "lima" # ARM Mali 4xx
-      "panfrost" # ARM Mali Midgard and up (T/G series)
-      "tegra" # Nvidia Tegra SoCs
-      "v3d" # Broadcom VC5 (Raspberry Pi 4)
-      "vc4" # Broadcom VC4 (Raspberry Pi 0-3)
-    ] ++ lib.optionals stdenv.hostPlatform.isx86 [
-      "iris" # new Intel, could work on non-x86 with PCIe cards, but doesn't build as of 22.3.4
-      "crocus" # Intel legacy, x86 only
-    ]
-  else [ "auto" ]
-, vulkanDrivers ?
-  if stdenv.isLinux then
-    [
-      "amd" # AMD (aka RADV)
-      "microsoft-experimental" # WSL virtualized GPU (aka DZN/Dozen)
-      "swrast" # software renderer (aka Lavapipe)
-    ]
-    ++ lib.optionals (stdenv.hostPlatform.isAarch -> lib.versionAtLeast stdenv.hostPlatform.parsed.cpu.version "6") [
-      # QEMU virtualized GPU (aka VirGL)
-      # Requires ATOMIC_INT_LOCK_FREE == 2.
-      "virtio-experimental"
-    ]
-    ++ lib.optionals stdenv.isAarch64 [
-      "broadcom" # Broadcom VC5 (Raspberry Pi 4, aka V3D)
-      "freedreno" # Qualcomm Adreno (all Qualcomm SoCs)
-      "imagination-experimental" # PowerVR Rogue (currently N/A)
-      "panfrost" # ARM Mali Midgard and up (T/G series)
-    ]
-    ++ lib.optionals stdenv.hostPlatform.isx86 [
-      "intel" # Intel (aka ANV), could work on non-x86 with PCIe cards, but doesn't build
-      "intel_hasvk" # Intel Haswell/Broadwell, "legacy" Vulkan driver (https://www.phoronix.com/news/Intel-HasVK-Drop-Dead-Code)
-    ]
-  else [ "auto" ]
-, eglPlatforms ? [ "x11" ] ++ lib.optionals stdenv.isLinux [ "wayland" ]
-, vulkanLayers ? lib.optionals (!stdenv.isDarwin) [ "device-select" "overlay" "intel-nullhw" ] # No Vulkan support on Darwin
-, OpenGL, Xplugin
-, withValgrind ? lib.meta.availableOn stdenv.hostPlatform valgrind-light && !valgrind-light.meta.broken, valgrind-light
-, enableGalliumNine ? stdenv.isLinux
-, enableOSMesa ? stdenv.isLinux
-, enableOpenCL ? stdenv.isLinux && stdenv.isx86_64
-, enablePatentEncumberedCodecs ? true
-, libclc
-, jdupes
-, rustc
-, rust-bindgen
-, spirv-llvm-translator
-, zstd
-, directx-headers
-, udev
-}:
-
-/** Packaging design:
-  - The basic mesa ($out) contains headers and libraries (GLU is in libGLU now).
-    This or the mesa attribute (which also contains GLU) are small (~ 2 MB, mostly headers)
-    and are designed to be the buildInput of other packages.
-  - DRI drivers are compiled into $drivers output, which is much bigger and
-    depends on LLVM. These should be searched at runtime in
-    "/run/opengl-driver{,-32}/lib/*" and so are kind-of impure (given by NixOS).
-    (I suppose on non-NixOS one would create the appropriate symlinks from there.)
-  - libOSMesa is in $osmesa (~4 MB)
-*/
-
-let
-  # Release calendar: https://www.mesa3d.org/release-calendar.html
-  # Release frequency: https://www.mesa3d.org/releasing.html#schedule
-  version = "22.3.7";
-  branch  = lib.versions.major version;
-
-  withLibdrm = lib.meta.availableOn stdenv.hostPlatform libdrm;
-
-  # Align all the Mesa versions used. Required to prevent explosions when
-  # two different LLVMs are loaded in the same process.
-  # FIXME: these should really go into some sort of versioned LLVM package set
-  rust-bindgen' = rust-bindgen.override {
-    rust-bindgen-unwrapped = rust-bindgen.unwrapped.override {
-      clang = llvmPackages.clang;
-    };
-  };
-  spirv-llvm-translator' = spirv-llvm-translator.override {
-    inherit (llvmPackages) llvm;
-  };
-
-  haveWayland = lib.elem "wayland" eglPlatforms;
-  haveZink = lib.elem "zink" galliumDrivers;
-  haveDozen = (lib.elem "d3d12" galliumDrivers) || (lib.elem "microsoft-experimental" vulkanDrivers);
-self = stdenv.mkDerivation {
-  pname = "mesa";
-  inherit version;
-
-  src = fetchurl {
-    urls = [
-      "https://archive.mesa3d.org/mesa-${version}.tar.xz"
-      "https://mesa.freedesktop.org/archive/mesa-${version}.tar.xz"
-      "ftp://ftp.freedesktop.org/pub/mesa/mesa-${version}.tar.xz"
-      "ftp://ftp.freedesktop.org/pub/mesa/${version}/mesa-${version}.tar.xz"
-      "ftp://ftp.freedesktop.org/pub/mesa/older-versions/${branch}.x/${version}/mesa-${version}.tar.xz"
-    ];
-    hash = "sha256-iUzi9KHC52F3zdIoRiAZLQ2jBmskPuwvux18838TBCw=";
-  };
-
-  # TODO:
-  #  revive ./dricore-gallium.patch when it gets ported (from Ubuntu), as it saved
-  #  ~35 MB in $drivers; watch https://launchpad.net/ubuntu/+source/mesa/+changelog
-  patches = [
-    # fixes pkgsMusl.mesa build
-    ./musl.patch
-
-    ./opencl.patch
-    ./disk_cache-include-dri-driver-path-in-cache-key.patch
-  ];
-
-  postPatch = ''
-    patchShebangs .
-
-    # The drirc.d directory cannot be installed to $drivers as that would cause a cyclic dependency:
-    substituteInPlace src/util/xmlconfig.c --replace \
-      'DATADIR "/drirc.d"' '"${placeholder "out"}/share/drirc.d"'
-    substituteInPlace src/util/meson.build --replace \
-      "get_option('datadir')" "'${placeholder "out"}/share'"
-    substituteInPlace src/amd/vulkan/meson.build --replace \
-      "get_option('datadir')" "'${placeholder "out"}/share'"
-  '';
-
-  outputs = [ "out" "dev" "drivers" ]
-    ++ lib.optional enableOSMesa "osmesa"
-    ++ lib.optional stdenv.isLinux "driversdev"
-    ++ lib.optional enableOpenCL "opencl"
-    # the Dozen drivers depend on libspirv2dxil, but link it statically, and
-    # libspirv2dxil itself is pretty chonky, so relocate it to its own output
-    # in case anything wants to use it at some point
-    ++ lib.optional haveDozen "spirv2dxil";
-
-  # FIXME: this fixes rusticl/iris segfaulting on startup, _somehow_.
-  # Needs more investigating.
-  separateDebugInfo = true;
-
-  preConfigure = ''
-    PATH=${llvmPackages.libllvm.dev}/bin:$PATH
-  '';
-
-  # TODO: Figure out how to enable opencl without having a runtime dependency on clang
-  mesonFlags = [
-    "--sysconfdir=/etc"
-    "--datadir=${placeholder "drivers"}/share" # Vendor files
-
-    # Don't build in debug mode
-    # https://gitlab.freedesktop.org/mesa/mesa/blob/master/docs/meson.html#L327
-    "-Db_ndebug=true"
-
-    "-Ddisk-cache-key=${placeholder "drivers"}"
-    "-Ddri-search-path=${libglvnd.driverLink}/lib/dri"
-
-    "-Dplatforms=${lib.concatStringsSep "," eglPlatforms}"
-    "-Dgallium-drivers=${lib.concatStringsSep "," galliumDrivers}"
-    "-Dvulkan-drivers=${lib.concatStringsSep "," vulkanDrivers}"
-
-    "-Ddri-drivers-path=${placeholder "drivers"}/lib/dri"
-    "-Dvdpau-libs-path=${placeholder "drivers"}/lib/vdpau"
-    "-Domx-libs-path=${placeholder "drivers"}/lib/bellagio"
-    "-Dva-libs-path=${placeholder "drivers"}/lib/dri"
-    "-Dd3d-drivers-path=${placeholder "drivers"}/lib/d3d"
-
-    "-Dgallium-nine=${lib.boolToString enableGalliumNine}" # Direct3D in Wine
-    "-Dosmesa=${lib.boolToString enableOSMesa}" # used by wine
-    "-Dmicrosoft-clc=disabled" # Only relevant on Windows (OpenCL 1.2 API on top of D3D12)
-
-    # To enable non-mesa gbm backends to be found (e.g. Nvidia)
-    "-Dgbm-backends-path=${libglvnd.driverLink}/lib/gbm:${placeholder "out"}/lib/gbm"
-  ] ++ lib.optionals stdenv.isLinux [
-    "-Dglvnd=true"
-
-    # Enable RT for Intel hardware
-    "-Dintel-clc=enabled"
-  ] ++ lib.optionals enableOpenCL [
-    # Clover, old OpenCL frontend
-    "-Dgallium-opencl=icd"
-    "-Dopencl-spirv=true"
-
-    # Rusticl, new OpenCL frontend
-    "-Dgallium-rusticl=true" "-Drust_std=2021"
-    "-Dclang-libdir=${llvmPackages.clang-unwrapped.lib}/lib"
-  ] ++ lib.optional enablePatentEncumberedCodecs
-    "-Dvideo-codecs=h264dec,h264enc,h265dec,h265enc,vc1dec"
-  ++ lib.optional (vulkanLayers != []) "-D vulkan-layers=${builtins.concatStringsSep "," vulkanLayers}";
-
-  buildInputs = with xorg; [
-    expat llvmPackages.libllvm libglvnd xorgproto
-    libX11 libXext libxcb libXt libXfixes libxshmfence libXrandr
-    libffi libvdpau libelf libXvMC
-    libpthreadstubs openssl /*or another sha1 provider*/
-    zstd
-  ] ++ lib.optionals haveWayland [ wayland wayland-protocols ]
-    ++ lib.optionals stdenv.isLinux [ libomxil-bellagio libva-minimal udev ]
-    ++ lib.optionals stdenv.isDarwin [ libunwind ]
-    ++ lib.optionals enableOpenCL [ libclc llvmPackages.clang llvmPackages.clang-unwrapped rustc rust-bindgen' spirv-llvm-translator' ]
-    ++ lib.optional withValgrind valgrind-light
-    ++ lib.optional haveZink vulkan-loader
-    ++ lib.optional haveDozen directx-headers;
-
-  depsBuildBuild = [ pkg-config ];
-
-  nativeBuildInputs = [
-    meson pkg-config ninja
-    intltool bison flex file
-    python3Packages.python python3Packages.mako python3Packages.ply
-    jdupes glslang
-  ] ++ lib.optional haveWayland wayland-scanner;
-
-  propagatedBuildInputs = with xorg; [
-    libXdamage libXxf86vm
-  ] ++ lib.optional withLibdrm libdrm
-    ++ lib.optionals stdenv.isDarwin [ OpenGL Xplugin ];
-
-  doCheck = false;
-
-  postInstall = ''
-    # Some installs don't have any drivers so this directory is never created.
-    mkdir -p $drivers $osmesa
-  '' + lib.optionalString stdenv.isLinux ''
-    mkdir -p $drivers/lib
-
-    if [ -n "$(shopt -s nullglob; echo "$out/lib/libxatracker"*)" -o -n "$(shopt -s nullglob; echo "$out/lib/libvulkan_"*)" ]; then
-      # move gallium-related stuff to $drivers, so $out doesn't depend on LLVM
-      mv -t $drivers/lib       \
-        $out/lib/libxatracker* \
-        $out/lib/libvulkan_*
-    fi
-
-    if [ -n "$(shopt -s nullglob; echo "$out"/lib/lib*_mesa*)" ]; then
-      # Move other drivers to a separate output
-      mv -t $drivers/lib $out/lib/lib*_mesa*
-    fi
-
-    # Update search path used by glvnd
-    for js in $drivers/share/glvnd/egl_vendor.d/*.json; do
-      substituteInPlace "$js" --replace '"libEGL_' '"'"$drivers/lib/libEGL_"
-    done
-
-    # Update search path used by Vulkan (it's pointing to $out but
-    # drivers are in $drivers)
-    for js in $drivers/share/vulkan/icd.d/*.json; do
-      substituteInPlace "$js" --replace "$out" "$drivers"
-    done
-  '' + lib.optionalString enableOpenCL ''
-    # Move OpenCL stuff
-    mkdir -p $opencl/lib
-    mv -t "$opencl/lib/"     \
-      $out/lib/gallium-pipe   \
-      $out/lib/lib*OpenCL*
-
-    # We construct our own .icd files that contain absolute paths.
-    mkdir -p $opencl/etc/OpenCL/vendors/
-    echo $opencl/lib/libMesaOpenCL.so > $opencl/etc/OpenCL/vendors/mesa.icd
-    echo $opencl/lib/libRusticlOpenCL.so > $opencl/etc/OpenCL/vendors/rusticl.icd
-  '' + lib.optionalString enableOSMesa ''
-    # move libOSMesa to $osmesa, as it's relatively big
-    mkdir -p $osmesa/lib
-    mv -t $osmesa/lib/ $out/lib/libOSMesa*
-  '' + lib.optionalString (vulkanLayers != []) ''
-    mv -t $drivers/lib $out/lib/libVkLayer*
-    for js in $drivers/share/vulkan/{im,ex}plicit_layer.d/*.json; do
-      substituteInPlace "$js" --replace '"libVkLayer_' '"'"$drivers/lib/libVkLayer_"
-    done
-  '' + lib.optionalString haveDozen ''
-    mkdir -p $spirv2dxil/{bin,lib}
-    mv -t $spirv2dxil/lib $out/lib/libspirv_to_dxil*
-    mv -t $spirv2dxil/bin $out/bin/spirv2dxil
-  '';
-
-  postFixup = lib.optionalString stdenv.isLinux ''
-    # set the default search path for DRI drivers; used e.g. by X server
-    substituteInPlace "$dev/lib/pkgconfig/dri.pc" --replace "$drivers" "${libglvnd.driverLink}"
-    [ -f "$dev/lib/pkgconfig/d3d.pc" ] && substituteInPlace "$dev/lib/pkgconfig/d3d.pc" --replace "$drivers" "${libglvnd.driverLink}"
-
-    # remove pkgconfig files for GL/EGL; they are provided by libGL.
-    rm -f $dev/lib/pkgconfig/{gl,egl}.pc
-
-    # Move development files for libraries in $drivers to $driversdev
-    mkdir -p $driversdev/include
-    mv $dev/include/xa_* $dev/include/d3d* -t $driversdev/include || true
-    mkdir -p $driversdev/lib/pkgconfig
-    for pc in lib/pkgconfig/{xatracker,d3d}.pc; do
-      if [ -f "$dev/$pc" ]; then
-        substituteInPlace "$dev/$pc" --replace $out $drivers
-        mv $dev/$pc $driversdev/$pc
-      fi
-    done
-
-    # NAR doesn't support hard links, so convert them to symlinks to save space.
-    jdupes --hard-links --link-soft --recurse "$drivers"
-
-    # add RPATH so the drivers can find the moved libgallium and libdricore9
-    # moved here to avoid problems with stripping patchelfed files
-    for lib in $drivers/lib/*.so* $drivers/lib/*/*.so*; do
-      if [[ ! -L "$lib" ]]; then
-        patchelf --set-rpath "$(patchelf --print-rpath $lib):$drivers/lib" "$lib"
-      fi
-    done
-  '';
-
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [ "-fno-common" ] ++ lib.optionals enableOpenCL [
-    "-UPIPE_SEARCH_DIR"
-    "-DPIPE_SEARCH_DIR=\"${placeholder "opencl"}/lib/gallium-pipe\""
-  ]);
-
-  passthru = {
-    inherit (libglvnd) driverLink;
-    inherit llvmPackages;
-
-    libdrm = if withLibdrm then libdrm else null;
-
-    tests = lib.optionalAttrs stdenv.isLinux {
-      devDoesNotDependOnLLVM = stdenv.mkDerivation {
-        name = "mesa-dev-does-not-depend-on-llvm";
-        buildCommand = ''
-          echo ${self.dev} >>$out
-        '';
-        disallowedRequisites = [ llvmPackages.llvm self.drivers ];
-      };
-    };
-  };
-
-  meta = with lib; {
-    description = "An open source 3D graphics library";
-    longDescription = ''
-      The Mesa project began as an open-source implementation of the OpenGL
-      specification - a system for rendering interactive 3D graphics. Over the
-      years the project has grown to implement more graphics APIs, including
-      OpenGL ES (versions 1, 2, 3), OpenCL, OpenMAX, VDPAU, VA API, XvMC, and
-      Vulkan.  A variety of device drivers allows the Mesa libraries to be used
-      in many different environments ranging from software emulation to
-      complete hardware acceleration for modern GPUs.
-    '';
-    homepage = "https://www.mesa3d.org/";
-    changelog = "https://www.mesa3d.org/relnotes/${version}.html";
-    license = licenses.mit; # X11 variant, in most files
-    platforms = platforms.mesaPlatforms;
-    maintainers = with maintainers; [ primeos vcunat ]; # Help is welcome :)
-  };
-};
-
-in self
diff --git a/pkgs/development/libraries/mesa/generic.nix b/pkgs/development/libraries/mesa/generic.nix
new file mode 100644
index 00000000000..ff2d445a2be
--- /dev/null
+++ b/pkgs/development/libraries/mesa/generic.nix
@@ -0,0 +1,369 @@
+{ version, hash }:
+
+{ stdenv, lib, fetchurl
+, meson, pkg-config, ninja
+, intltool, bison, flex, file, python3Packages, wayland-scanner
+, expat, libdrm, xorg, wayland, wayland-protocols, openssl
+, llvmPackages_15, libffi, libomxil-bellagio, libva-minimal
+, libelf, libvdpau
+, libglvnd, libunwind
+, vulkan-loader, glslang
+, galliumDrivers ?
+  if stdenv.isLinux then
+    [
+      "d3d12" # WSL emulated GPU (aka Dozen)
+      "kmsro" # helper driver for display-only devices
+      "nouveau" # Nvidia
+      "radeonsi" # new AMD (GCN+)
+      "r300" # very old AMD
+      "r600" # less old AMD
+      "swrast" # software renderer (aka LLVMPipe)
+      "svga" # VMWare virtualized GPU
+      "virgl" # QEMU virtualized GPU (aka VirGL)
+      "zink" # generic OpenGL over Vulkan, experimental
+    ]
+    ++ lib.optionals stdenv.isAarch64 [
+      "etnaviv" # Vivante GPU designs (mostly NXP/Marvell SoCs)
+      "freedreno" # Qualcomm Adreno (all Qualcomm SoCs)
+      "lima" # ARM Mali 4xx
+      "panfrost" # ARM Mali Midgard and up (T/G series)
+      "tegra" # Nvidia Tegra SoCs
+      "v3d" # Broadcom VC5 (Raspberry Pi 4)
+      "vc4" # Broadcom VC4 (Raspberry Pi 0-3)
+    ] ++ lib.optionals stdenv.hostPlatform.isx86 [
+      "iris" # new Intel, could work on non-x86 with PCIe cards, but doesn't build as of 22.3.4
+      "crocus" # Intel legacy, x86 only
+    ]
+  else [ "auto" ]
+, vulkanDrivers ?
+  if stdenv.isLinux then
+    [
+      "amd" # AMD (aka RADV)
+      "microsoft-experimental" # WSL virtualized GPU (aka DZN/Dozen)
+      "swrast" # software renderer (aka Lavapipe)
+    ]
+    ++ lib.optionals (stdenv.hostPlatform.isAarch -> lib.versionAtLeast stdenv.hostPlatform.parsed.cpu.version "6") [
+      # QEMU virtualized GPU (aka VirGL)
+      # Requires ATOMIC_INT_LOCK_FREE == 2.
+      "virtio-experimental"
+    ]
+    ++ lib.optionals stdenv.isAarch64 [
+      "broadcom" # Broadcom VC5 (Raspberry Pi 4, aka V3D)
+      "freedreno" # Qualcomm Adreno (all Qualcomm SoCs)
+      "imagination-experimental" # PowerVR Rogue (currently N/A)
+      "panfrost" # ARM Mali Midgard and up (T/G series)
+    ]
+    ++ lib.optionals stdenv.hostPlatform.isx86 [
+      "intel" # Intel (aka ANV), could work on non-x86 with PCIe cards, but doesn't build
+      "intel_hasvk" # Intel Haswell/Broadwell, "legacy" Vulkan driver (https://www.phoronix.com/news/Intel-HasVK-Drop-Dead-Code)
+    ]
+  else [ "auto" ]
+, eglPlatforms ? [ "x11" ] ++ lib.optionals stdenv.isLinux [ "wayland" ]
+, vulkanLayers ? lib.optionals (!stdenv.isDarwin) [ "device-select" "overlay" "intel-nullhw" ] # No Vulkan support on Darwin
+, OpenGL, Xplugin
+, withValgrind ? lib.meta.availableOn stdenv.hostPlatform valgrind-light && !valgrind-light.meta.broken, valgrind-light
+, enableGalliumNine ? stdenv.isLinux
+, enableOSMesa ? stdenv.isLinux
+, enableOpenCL ? stdenv.isLinux && stdenv.isx86_64
+, enablePatentEncumberedCodecs ? true
+, libclc
+, jdupes
+, rustc
+, rust-bindgen
+, spirv-llvm-translator
+, zstd
+, directx-headers
+, udev
+}:
+
+/** Packaging design:
+  - The basic mesa ($out) contains headers and libraries (GLU is in libGLU now).
+    This or the mesa attribute (which also contains GLU) are small (~ 2 MB, mostly headers)
+    and are designed to be the buildInput of other packages.
+  - DRI drivers are compiled into $drivers output, which is much bigger and
+    depends on LLVM. These should be searched at runtime in
+    "/run/opengl-driver{,-32}/lib/*" and so are kind-of impure (given by NixOS).
+    (I suppose on non-NixOS one would create the appropriate symlinks from there.)
+  - libOSMesa is in $osmesa (~4 MB)
+*/
+
+let
+  # Release calendar: https://www.mesa3d.org/release-calendar.html
+  # Release frequency: https://www.mesa3d.org/releasing.html#schedule
+  branch = lib.versions.major version;
+
+  withLibdrm = lib.meta.availableOn stdenv.hostPlatform libdrm;
+
+  llvmPackages = llvmPackages_15;
+  # Align all the Mesa versions used. Required to prevent explosions when
+  # two different LLVMs are loaded in the same process.
+  # FIXME: these should really go into some sort of versioned LLVM package set
+  rust-bindgen' = rust-bindgen.override {
+    rust-bindgen-unwrapped = rust-bindgen.unwrapped.override {
+      clang = llvmPackages.clang;
+    };
+  };
+  spirv-llvm-translator' = spirv-llvm-translator.override {
+    inherit (llvmPackages) llvm;
+  };
+
+  haveWayland = lib.elem "wayland" eglPlatforms;
+  haveZink = lib.elem "zink" galliumDrivers;
+  haveDozen = (lib.elem "d3d12" galliumDrivers) || (lib.elem "microsoft-experimental" vulkanDrivers);
+self = stdenv.mkDerivation {
+  pname = "mesa";
+  inherit version;
+
+  src = fetchurl {
+    urls = [
+      "https://archive.mesa3d.org/mesa-${version}.tar.xz"
+      "https://mesa.freedesktop.org/archive/mesa-${version}.tar.xz"
+      "ftp://ftp.freedesktop.org/pub/mesa/mesa-${version}.tar.xz"
+      "ftp://ftp.freedesktop.org/pub/mesa/${version}/mesa-${version}.tar.xz"
+      "ftp://ftp.freedesktop.org/pub/mesa/older-versions/${branch}.x/${version}/mesa-${version}.tar.xz"
+    ];
+    inherit hash;
+  };
+
+  # TODO:
+  #  revive ./dricore-gallium.patch when it gets ported (from Ubuntu), as it saved
+  #  ~35 MB in $drivers; watch https://launchpad.net/ubuntu/+source/mesa/+changelog
+  patches = [
+    # fixes pkgsMusl.mesa build
+    ./musl.patch
+
+    ./opencl.patch
+    ./disk_cache-include-dri-driver-path-in-cache-key.patch
+  ];
+
+  postPatch = ''
+    patchShebangs .
+
+    # The drirc.d directory cannot be installed to $drivers as that would cause a cyclic dependency:
+    substituteInPlace src/util/xmlconfig.c --replace \
+      'DATADIR "/drirc.d"' '"${placeholder "out"}/share/drirc.d"'
+    substituteInPlace src/util/meson.build --replace \
+      "get_option('datadir')" "'${placeholder "out"}/share'"
+    substituteInPlace src/amd/vulkan/meson.build --replace \
+      "get_option('datadir')" "'${placeholder "out"}/share'"
+  '';
+
+  outputs = [ "out" "dev" "drivers" ]
+    ++ lib.optional enableOSMesa "osmesa"
+    ++ lib.optional stdenv.isLinux "driversdev"
+    ++ lib.optional enableOpenCL "opencl"
+    # the Dozen drivers depend on libspirv2dxil, but link it statically, and
+    # libspirv2dxil itself is pretty chonky, so relocate it to its own output
+    # in case anything wants to use it at some point
+    ++ lib.optional haveDozen "spirv2dxil";
+
+  # FIXME: this fixes rusticl/iris segfaulting on startup, _somehow_.
+  # Needs more investigating.
+  separateDebugInfo = true;
+
+  preConfigure = ''
+    PATH=${llvmPackages.libllvm.dev}/bin:$PATH
+  '';
+
+  # TODO: Figure out how to enable opencl without having a runtime dependency on clang
+  mesonFlags = [
+    "--sysconfdir=/etc"
+    "--datadir=${placeholder "drivers"}/share" # Vendor files
+
+    # Don't build in debug mode
+    # https://gitlab.freedesktop.org/mesa/mesa/blob/master/docs/meson.html#L327
+    "-Db_ndebug=true"
+
+    "-Ddisk-cache-key=${placeholder "drivers"}"
+    "-Ddri-search-path=${libglvnd.driverLink}/lib/dri"
+
+    "-Dplatforms=${lib.concatStringsSep "," eglPlatforms}"
+    "-Dgallium-drivers=${lib.concatStringsSep "," galliumDrivers}"
+    "-Dvulkan-drivers=${lib.concatStringsSep "," vulkanDrivers}"
+
+    "-Ddri-drivers-path=${placeholder "drivers"}/lib/dri"
+    "-Dvdpau-libs-path=${placeholder "drivers"}/lib/vdpau"
+    "-Domx-libs-path=${placeholder "drivers"}/lib/bellagio"
+    "-Dva-libs-path=${placeholder "drivers"}/lib/dri"
+    "-Dd3d-drivers-path=${placeholder "drivers"}/lib/d3d"
+
+    "-Dgallium-nine=${lib.boolToString enableGalliumNine}" # Direct3D in Wine
+    "-Dosmesa=${lib.boolToString enableOSMesa}" # used by wine
+    "-Dmicrosoft-clc=disabled" # Only relevant on Windows (OpenCL 1.2 API on top of D3D12)
+
+    # To enable non-mesa gbm backends to be found (e.g. Nvidia)
+    "-Dgbm-backends-path=${libglvnd.driverLink}/lib/gbm:${placeholder "out"}/lib/gbm"
+  ] ++ lib.optionals stdenv.isLinux [
+    "-Dglvnd=true"
+
+    # Enable RT for Intel hardware
+    "-Dintel-clc=enabled"
+  ] ++ lib.optionals enableOpenCL [
+    # Clover, old OpenCL frontend
+    "-Dgallium-opencl=icd"
+    "-Dopencl-spirv=true"
+
+    # Rusticl, new OpenCL frontend
+    "-Dgallium-rusticl=true" "-Drust_std=2021"
+    "-Dclang-libdir=${llvmPackages.clang-unwrapped.lib}/lib"
+  ] ++ lib.optional enablePatentEncumberedCodecs
+    "-Dvideo-codecs=h264dec,h264enc,h265dec,h265enc,vc1dec"
+  ++ lib.optional (vulkanLayers != []) "-D vulkan-layers=${builtins.concatStringsSep "," vulkanLayers}";
+
+  buildInputs = with xorg; [
+    expat llvmPackages.libllvm libglvnd xorgproto
+    libX11 libXext libxcb libXt libXfixes libxshmfence libXrandr
+    libffi libvdpau libelf libXvMC
+    libpthreadstubs openssl /*or another sha1 provider*/
+    zstd
+  ] ++ lib.optionals haveWayland [ wayland wayland-protocols ]
+    ++ lib.optionals stdenv.isLinux [ libomxil-bellagio libva-minimal udev ]
+    ++ lib.optionals stdenv.isDarwin [ libunwind ]
+    ++ lib.optionals enableOpenCL [ libclc llvmPackages.clang llvmPackages.clang-unwrapped rustc rust-bindgen' spirv-llvm-translator' ]
+    ++ lib.optional withValgrind valgrind-light
+    ++ lib.optional haveZink vulkan-loader
+    ++ lib.optional haveDozen directx-headers;
+
+  depsBuildBuild = [ pkg-config ];
+
+  nativeBuildInputs = [
+    meson pkg-config ninja
+    intltool bison flex file
+    python3Packages.python python3Packages.mako python3Packages.ply
+    jdupes glslang
+  ] ++ lib.optional haveWayland wayland-scanner;
+
+  propagatedBuildInputs = with xorg; [
+    libXdamage libXxf86vm
+  ] ++ lib.optional withLibdrm libdrm
+    ++ lib.optionals stdenv.isDarwin [ OpenGL Xplugin ];
+
+  doCheck = false;
+
+  postInstall = ''
+    # Some installs don't have any drivers so this directory is never created.
+    mkdir -p $drivers $osmesa
+  '' + lib.optionalString stdenv.isLinux ''
+    mkdir -p $drivers/lib
+
+    if [ -n "$(shopt -s nullglob; echo "$out/lib/libxatracker"*)" -o -n "$(shopt -s nullglob; echo "$out/lib/libvulkan_"*)" ]; then
+      # move gallium-related stuff to $drivers, so $out doesn't depend on LLVM
+      mv -t $drivers/lib       \
+        $out/lib/libxatracker* \
+        $out/lib/libvulkan_*
+    fi
+
+    if [ -n "$(shopt -s nullglob; echo "$out"/lib/lib*_mesa*)" ]; then
+      # Move other drivers to a separate output
+      mv -t $drivers/lib $out/lib/lib*_mesa*
+    fi
+
+    # Update search path used by glvnd
+    for js in $drivers/share/glvnd/egl_vendor.d/*.json; do
+      substituteInPlace "$js" --replace '"libEGL_' '"'"$drivers/lib/libEGL_"
+    done
+
+    # Update search path used by Vulkan (it's pointing to $out but
+    # drivers are in $drivers)
+    for js in $drivers/share/vulkan/icd.d/*.json; do
+      substituteInPlace "$js" --replace "$out" "$drivers"
+    done
+  '' + lib.optionalString enableOpenCL ''
+    # Move OpenCL stuff
+    mkdir -p $opencl/lib
+    mv -t "$opencl/lib/"     \
+      $out/lib/gallium-pipe   \
+      $out/lib/lib*OpenCL*
+
+    # We construct our own .icd files that contain absolute paths.
+    mkdir -p $opencl/etc/OpenCL/vendors/
+    echo $opencl/lib/libMesaOpenCL.so > $opencl/etc/OpenCL/vendors/mesa.icd
+    echo $opencl/lib/libRusticlOpenCL.so > $opencl/etc/OpenCL/vendors/rusticl.icd
+  '' + lib.optionalString enableOSMesa ''
+    # move libOSMesa to $osmesa, as it's relatively big
+    mkdir -p $osmesa/lib
+    mv -t $osmesa/lib/ $out/lib/libOSMesa*
+  '' + lib.optionalString (vulkanLayers != []) ''
+    mv -t $drivers/lib $out/lib/libVkLayer*
+    for js in $drivers/share/vulkan/{im,ex}plicit_layer.d/*.json; do
+      substituteInPlace "$js" --replace '"libVkLayer_' '"'"$drivers/lib/libVkLayer_"
+    done
+  '' + lib.optionalString haveDozen ''
+    mkdir -p $spirv2dxil/{bin,lib}
+    mv -t $spirv2dxil/lib $out/lib/libspirv_to_dxil*
+    mv -t $spirv2dxil/bin $out/bin/spirv2dxil
+  '';
+
+  postFixup = lib.optionalString stdenv.isLinux ''
+    # set the default search path for DRI drivers; used e.g. by X server
+    substituteInPlace "$dev/lib/pkgconfig/dri.pc" --replace "$drivers" "${libglvnd.driverLink}"
+    [ -f "$dev/lib/pkgconfig/d3d.pc" ] && substituteInPlace "$dev/lib/pkgconfig/d3d.pc" --replace "$drivers" "${libglvnd.driverLink}"
+
+    # remove pkgconfig files for GL/EGL; they are provided by libGL.
+    rm -f $dev/lib/pkgconfig/{gl,egl}.pc
+
+    # Move development files for libraries in $drivers to $driversdev
+    mkdir -p $driversdev/include
+    mv $dev/include/xa_* $dev/include/d3d* -t $driversdev/include || true
+    mkdir -p $driversdev/lib/pkgconfig
+    for pc in lib/pkgconfig/{xatracker,d3d}.pc; do
+      if [ -f "$dev/$pc" ]; then
+        substituteInPlace "$dev/$pc" --replace $out $drivers
+        mv $dev/$pc $driversdev/$pc
+      fi
+    done
+
+    # NAR doesn't support hard links, so convert them to symlinks to save space.
+    jdupes --hard-links --link-soft --recurse "$drivers"
+
+    # add RPATH so the drivers can find the moved libgallium and libdricore9
+    # moved here to avoid problems with stripping patchelfed files
+    for lib in $drivers/lib/*.so* $drivers/lib/*/*.so*; do
+      if [[ ! -L "$lib" ]]; then
+        patchelf --set-rpath "$(patchelf --print-rpath $lib):$drivers/lib" "$lib"
+      fi
+    done
+  '';
+
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [ "-fno-common" ] ++ lib.optionals enableOpenCL [
+    "-UPIPE_SEARCH_DIR"
+    "-DPIPE_SEARCH_DIR=\"${placeholder "opencl"}/lib/gallium-pipe\""
+  ]);
+
+  passthru = {
+    inherit (libglvnd) driverLink;
+    inherit llvmPackages;
+
+    libdrm = if withLibdrm then libdrm else null;
+
+    tests = lib.optionalAttrs stdenv.isLinux {
+      devDoesNotDependOnLLVM = stdenv.mkDerivation {
+        name = "mesa-dev-does-not-depend-on-llvm";
+        buildCommand = ''
+          echo ${self.dev} >>$out
+        '';
+        disallowedRequisites = [ llvmPackages.llvm self.drivers ];
+      };
+    };
+  };
+
+  meta = with lib; {
+    description = "An open source 3D graphics library";
+    longDescription = ''
+      The Mesa project began as an open-source implementation of the OpenGL
+      specification - a system for rendering interactive 3D graphics. Over the
+      years the project has grown to implement more graphics APIs, including
+      OpenGL ES (versions 1, 2, 3), OpenCL, OpenMAX, VDPAU, VA API, XvMC, and
+      Vulkan.  A variety of device drivers allows the Mesa libraries to be used
+      in many different environments ranging from software emulation to
+      complete hardware acceleration for modern GPUs.
+    '';
+    homepage = "https://www.mesa3d.org/";
+    changelog = "https://www.mesa3d.org/relnotes/${version}.html";
+    license = licenses.mit; # X11 variant, in most files
+    platforms = platforms.mesaPlatforms;
+    maintainers = with maintainers; [ primeos vcunat ]; # Help is welcome :)
+  };
+};
+
+in self
-- 
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