mesa: remove darwin-specific derivations

The ‘mesa-darwin’ stuff was very out of date (2012). This moves darwin
to use the newer mesa. Stuff seems to build okay. Needs more testing
on other stuff though (libraries work). No drivers build but that is
how it should work on macOS.

/cc @cstrahan @Anton-Latukha

pkgs/development/libraries/mesa/default.nix

@@ -8,6 +8,8 @@
 , galliumDrivers ? null
 , driDrivers ? null
 , vulkanDrivers ? null
+, eglPlatforms ? [ "x11" ] ++ lib.optionals stdenv.isLinux [ "wayland" "drm" ]
+, OpenGL, Xplugin
 }:
 
 /** Packaging design:
@@ -29,19 +31,21 @@ else
 
 let
   defaultGalliumDrivers =
-    if stdenv.isAarch32
+    optionals (builtins.elem "drm" eglPlatforms)
+    (if stdenv.isAarch32
     then ["virgl" "nouveau" "freedreno" "vc4" "etnaviv" "imx"]
     else if stdenv.isAarch64
     then ["virgl" "nouveau" "vc4" ]
-    else ["virgl" "svga" "i915" "r300" "r600" "radeonsi" "nouveau"];
+    else ["virgl" "svga" "i915" "r300" "r600" "radeonsi" "nouveau"]);
   defaultDriDrivers =
-    if (stdenv.isAarch32 || stdenv.isAarch64)
+    optionals (builtins.elem "drm" eglPlatforms)
+    (if (stdenv.isAarch32 || stdenv.isAarch64)
     then ["nouveau"]
-    else ["i915" "i965" "nouveau" "radeon" "r200"];
+    else ["i915" "i965" "nouveau" "radeon" "r200"]);
   defaultVulkanDrivers =
-    if (stdenv.isAarch32 || stdenv.isAarch64)
+    optionals stdenv.isLinux (if (stdenv.isAarch32 || stdenv.isAarch64)
     then []
-    else ["intel"] ++ lib.optional enableRadv "radeon";
+    else ["intel"] ++ lib.optional enableRadv "radeon");
 in
 
 let gallium_ = galliumDrivers; dri_ = driDrivers; vulkan_ = vulkanDrivers; in
@@ -51,11 +55,11 @@ let
     (if gallium_ == null
           then defaultGalliumDrivers
           else gallium_)
-    ++ ["swrast" "virgl"];
+    ++ lib.optional stdenv.isLinux "swrast";
   driDrivers =
     (if dri_ == null
-      then defaultDriDrivers
-      else dri_) ++ ["swrast"];
+      then optionals (elem "drm" eglPlatforms) defaultDriDrivers
+      else dri_) ++ lib.optional stdenv.isLinux "swrast";
   vulkanDrivers =
     if vulkan_ == null
     then defaultVulkanDrivers
@@ -89,9 +93,10 @@ let self = stdenv.mkDerivation {
     ./symlink-drivers.patch
     ./missing-includes.patch # dev_t needs sys/stat.h, time_t needs time.h, etc.-- fixes build w/musl
     ./disk_cache-include-dri-driver-path-in-cache-key.patch
-  ];
+  ] ++ lib.optional stdenv.isDarwin ./darwin-clock-gettime.patch;
 
-  outputs = [ "out" "dev" "drivers" "osmesa" ];
+  outputs = [ "out" "dev" "drivers" ]
+            ++ lib.optional (elem "swrast" galliumDrivers) "osmesa";
 
   # TODO: Figure out how to enable opencl without having a runtime dependency on clang
   configureFlags = [
@@ -99,18 +104,10 @@ let self = stdenv.mkDerivation {
     "--localstatedir=/var"
     "--with-dri-driverdir=$(drivers)/lib/dri"
     "--with-dri-searchpath=${libglvnd.driverLink}/lib/dri"
-    "--with-platforms=x11,wayland,drm"
-  ]
-  ++ (optional (galliumDrivers != [])
-      ("--with-gallium-drivers=" +
-        builtins.concatStringsSep "," galliumDrivers))
-  ++ (optional (driDrivers != [])
-      ("--with-dri-drivers=" +
-        builtins.concatStringsSep "," driDrivers))
-  ++ (optional (vulkanDrivers != [])
-      ("--with-vulkan-drivers=" +
-        builtins.concatStringsSep "," vulkanDrivers))
-  ++ [
+    "--with-platforms=${concatStringsSep "," eglPlatforms}"
+    "--with-gallium-drivers=${concatStringsSep "," galliumDrivers}"
+    "--with-dri-drivers=${concatStringsSep "," driDrivers}"
+    "--with-vulkan-drivers=${concatStringsSep "," vulkanDrivers}"
     (enableFeature stdenv.isLinux "dri3")
     (enableFeature stdenv.isLinux "nine") # Direct3D in Wine
     "--enable-libglvnd"
@@ -121,17 +118,18 @@ let self = stdenv.mkDerivation {
     "--enable-glx"
     # https://bugs.freedesktop.org/show_bug.cgi?id=35268
     (enableFeature (!stdenv.hostPlatform.isMusl) "glx-tls")
-    "--enable-gallium-osmesa" # used by wine
+    # used by wine
+    (enableFeature (elem "swrast" galliumDrivers) "gallium-osmesa")
     "--enable-llvm"
-    "--enable-egl"
-    "--enable-xa" # used in vmware driver
-    "--enable-gbm"
+    (enableFeature stdenv.isLinux "egl")
+    (enableFeature stdenv.isLinux "xa") # used in vmware driver
+    (enableFeature stdenv.isLinux "gbm")
     "--enable-xvmc"
     "--enable-vdpau"
     "--enable-shared-glapi"
     "--enable-llvm-shared-libs"
-    "--enable-omx-bellagio"
-    "--enable-va"
+    (enableFeature stdenv.isLinux "omx-bellagio")
+    (enableFeature stdenv.isLinux "va")
     "--disable-opencl"
   ];
 
@@ -139,16 +137,18 @@ let self = stdenv.mkDerivation {
 
   propagatedBuildInputs = with xorg;
     [ libXdamage libXxf86vm ]
-    ++ optional stdenv.isLinux libdrm;
+    ++ optional stdenv.isLinux libdrm
+    ++ optionals stdenv.isDarwin [ OpenGL Xplugin ];
 
   buildInputs = with xorg; [
     expat llvmPackages.llvm libglvnd
     glproto dri2proto dri3proto presentproto
     libX11 libXext libxcb libXt libXfixes libxshmfence
-    libffi wayland wayland-protocols libvdpau libelf libXvMC
-    libomxil-bellagio libva-minimal libpthreadstubs openssl/*or another sha1 provider*/
+    libffi libvdpau libelf libXvMC
+    libpthreadstubs openssl/*or another sha1 provider*/
     valgrind-light python2 python2.pkgs.Mako
-  ];
+  ] ++ lib.optionals stdenv.isLinux [ wayland wayland-protocols
+                                      libomxil-bellagio libva-minimal ];
 
   enableParallelBuilding = true;
   doCheck = false;
@@ -160,7 +160,7 @@ let self = stdenv.mkDerivation {
   ];
 
   # TODO: probably not all .la files are completely fixed, but it shouldn't matter;
-  postInstall = ''
+  postInstall = optionalString (galliumDrivers != []) ''
     # move gallium-related stuff to $drivers, so $out doesn't depend on LLVM
     mv -t "$drivers/lib/"    \
       $out/lib/libXvMC*      \
@@ -214,7 +214,7 @@ let self = stdenv.mkDerivation {
   # TODO:
   #  check $out doesn't depend on llvm: builder failures are ignored
   #  for some reason grep -qv '${llvmPackages.llvm}' -R "$out";
-  postFixup = ''
+  postFixup = optionalString (galliumDrivers != []) ''
     # 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
@@ -234,7 +234,9 @@ let self = stdenv.mkDerivation {
 
       # Use stub libraries from libglvnd and headers from Mesa.
       buildCommand = ''
-        ln -s ${libglvnd.out} $out
+        mkdir -p $out/nix-support
+        ln -s ${libglvnd.out}/lib $out/lib
+
         mkdir -p $dev/{,lib/pkgconfig,nix-support}
         echo "$out" > $dev/nix-support/propagated-build-inputs
         ln -s ${self.dev}/include $dev/include
@@ -256,6 +258,8 @@ let self = stdenv.mkDerivation {
         genPkgConfig egl EGL
         genPkgConfig glesv1_cm GLESv1_CM
         genPkgConfig glesv2 GLESv2
+      '' + lib.optionalString stdenv.isDarwin ''
+        echo ${OpenGL} > $out/nix-support/propagated-build-inputs
       '';
     };
   };
@@ -264,7 +268,7 @@ let self = stdenv.mkDerivation {
     description = "An open source implementation of OpenGL";
     homepage = https://www.mesa3d.org/;
     license = licenses.mit; # X11 variant, in most files
-    platforms = platforms.linux;
+    platforms = platforms.linux ++ platforms.darwin;
     maintainers = with maintainers; [ vcunat ];
   };
 };