rutabaga_gfx: fix build on Darwin (NixOS#298441)

* gfxstream: fix build on Darwin

- Add patch from upstream to remove libdrm dependency;
- Modify `meson.build` to support Objective-C;
- Add required Darwin frameworks; and
- Ensure everything that’s required is linked on Darwin.

* rutabaga_gfx: fix build on Darwin

pkgs/development/libraries/gfxstream/default.nix

@@ -1,5 +1,5 @@
-{ lib, stdenv, fetchFromGitiles, meson, ninja, pkg-config, python3
-, aemu, libdrm, libglvnd, vulkan-headers, vulkan-loader, xorg
+{ lib, stdenv, fetchFromGitiles, fetchpatch, meson, ninja, pkg-config, python3
+, aemu, darwin, libdrm, libglvnd, vulkan-headers, vulkan-loader, xorg
 }:
 
 stdenv.mkDerivation {
@@ -12,14 +12,45 @@ stdenv.mkDerivation {
     hash = "sha256-IYXkaHZPEYIE9KW731GN6x6yRS+FYtP1zyHcaSofhIM=";
   };
 
+  patches = [
+    # Make libdrm an optional dependency, which is required to build on Darwin.
+    (fetchpatch {
+      url = "https://android.googlesource.com/platform/hardware/google/gfxstream/+/a8df2a3eb099b419a7b3638e68ea30b4cffb751b%5E%21/?format=TEXT";
+      decode = "base64 -d";
+      hash = "sha256-shjeNuxtQokscCGBKEUbOPKOWRELBAnHFNj3Y5w87Nw=";
+    })
+  ];
+
+  # Ensure that meson can find an Objective-C compiler on Darwin.
+  postPatch = lib.optionalString stdenv.isDarwin ''
+    substituteInPlace meson.build \
+      --replace-fail "project('gfxstream_backend', 'cpp', 'c'" "project('gfxstream_backend', 'cpp', 'c', 'objc'"
+  '';
+
   nativeBuildInputs = [ meson ninja pkg-config python3 ];
   buildInputs = [ aemu libglvnd vulkan-headers vulkan-loader xorg.libX11 ]
-    ++ lib.optional (lib.meta.availableOn stdenv.hostPlatform libdrm) libdrm;
+    ++ lib.optionals (lib.meta.availableOn stdenv.hostPlatform libdrm) [ libdrm ]
+    ++ lib.optionals stdenv.isDarwin [
+      darwin.apple_sdk.frameworks.Cocoa
+      darwin.apple_sdk.frameworks.CoreGraphics
+      darwin.apple_sdk.frameworks.IOKit
+      darwin.apple_sdk.frameworks.IOSurface
+      darwin.apple_sdk.frameworks.OpenGL
+      darwin.apple_sdk.frameworks.QuartzCore
+    ];
+
+  env = lib.optionalAttrs stdenv.isDarwin {
+    NIX_LDFLAGS = toString [
+      "-framework Cocoa"
+      "-framework IOKit"
+      "-framework IOSurface"
+      "-framework OpenGL"
+      "-framework QuartzCore"
+      "-needed-lvulkan"
+    ];
+  };
 
   # dlopens libvulkan.
-  #
-  # XXX: Unsure if this is required on Darwin.  If it is, it probably
-  #      needs to be done using install_name_tool.
   preConfigure = lib.optionalString (!stdenv.isDarwin) ''
     mesonFlagsArray=(-Dcpp_link_args="-Wl,--push-state -Wl,--no-as-needed -lvulkan -Wl,--pop-state")
   '';

pkgs/development/libraries/rutabaga_gfx/darwin-install.patch

@@ -0,0 +1,31 @@
+diff --git a/rutabaga_gfx/ffi/Makefile b/rutabaga_gfx/ffi/Makefile
+index f8c7820bf..e88a6c308 100644
+--- a/rutabaga_gfx/ffi/Makefile
++++ b/rutabaga_gfx/ffi/Makefile
+@@ -47,24 +47,16 @@ build:
+ 	cargo build $(gfxstream_feature) $(release)
+
+ install: build
+-ifeq ($(UNAME), Linux)
+ 	install -D -m 755 $(OUT)/$(LIB_NAME) $(DESTDIR)$(libdir)/$(LIB_NAME).$(RUTABAGA_VERSION)
+-endif
+ ifeq ($(UNAME), Darwin)
+-	install_name_tool -id $(DESTDIR)$(libdir)/$(LIB_NAME).$(RUTABAGA_VERSION) $(DESTDIR)$(libdir)/$(LIB_NAME)
++	install_name_tool -id $(DESTDIR)$(libdir)/$(LIB_NAME).$(RUTABAGA_VERSION) $(DESTDIR)$(libdir)/$(LIB_NAME).$(RUTABAGA_VERSION)
+ endif
+
+ 	ln -sf $(LIB_NAME).$(RUTABAGA_VERSION) $(DESTDIR)$(libdir)/$(LIB_NAME).$(RUTABAGA_VERSION_MAJOR)
+ 	ln -sf $(LIB_NAME).$(RUTABAGA_VERSION) $(DESTDIR)$(libdir)/$(LIB_NAME)
+
+-ifeq ($(UNAME), Linux)
+ 	install -D -m 0644 $(SRC)/share/rutabaga_gfx_ffi.pc $(DESTDIR)$(libdir)/pkgconfig/rutabaga_gfx_ffi.pc
+ 	install -D -m 0644 $(SRC)/include/rutabaga_gfx_ffi.h $(DESTDIR)$(includedir)/rutabaga_gfx_ffi.h
+-endif
+-ifeq ($(UNAME), Darwin)
+-	install -m 0644 $(SRC)/share/rutabaga_gfx_ffi.pc $(DESTDIR)$(libdir)/pkgconfig/rutabaga_gfx_ffi.pc
+-	install -m 0644 $(SRC)/include/rutabaga_gfx_ffi.h $(DESTDIR)$(includedir)/rutabaga_gfx_ffi.h
+-endif
+
+ clean:
+ 	cargo clean $(release)
+

pkgs/development/libraries/rutabaga_gfx/default.nix

@@ -8,6 +8,7 @@
 , aemu
 , gfxstream
 , libdrm
+, libiconv
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -29,10 +30,19 @@ stdenv.mkDerivation (finalAttrs: {
       decode = "base64 -d";
       hash = "sha256-Ji1bK7jnRlg0OpDfCLcTHfPSiz3zYcdgsWL4n3EoIYI=";
     })
+    # Fix error in Makefile where it uses eight spaces instead of a tab
+    # https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4863380
+    (fetchpatch {
+      url = "https://chromium.googlesource.com/crosvm/crosvm/+/fc415bccc43d36f63a2fd4c28878591bb1053450%5E%21/?format=TEXT";
+      decode = "base64 -d";
+      hash = "sha256-SLzlZ4o1+R2bGTPvA0a5emq97hOIIIHrubFhcQjqYwg=";
+    })
+    # Install the dylib on Darwin.
+    ./darwin-install.patch
   ];
 
   nativeBuildInputs = [ cargo pkg-config rustPlatform.cargoSetupHook ];
-  buildInputs = lib.optionals (lib.meta.availableOn stdenv.hostPlatform gfxstream) ([
+  buildInputs = [ libiconv ] ++ lib.optionals (lib.meta.availableOn stdenv.hostPlatform gfxstream) ([
     aemu
     gfxstream
   ] ++ lib.optionals (lib.meta.availableOn stdenv.hostPlatform libdrm) [