openscenegraph: opencascade -> opencascade-occt

pkgs/development/libraries/openscenegraph/default.nix

···
-{ stdenv, lib, fetchFromGitHub, cmake, pkg-config, doxygen,
+{ stdenv, lib, fetchFromGitHub, fetchpatch, cmake, pkg-config, doxygen,
   libX11, libXinerama, libXrandr, libGLU, libGL,
   glib, ilmbase, libxml2, pcre, zlib,
   AGL, Accelerate, Carbon, Cocoa, Foundation,
···
   gdalSupport ? false, gdal,
   curlSupport ? true, curl,
   colladaSupport ? false, collada-dom,
-  opencascadeSupport ? false, opencascade,
+  opencascadeSupport ? false, opencascade-occt,
   ffmpegSupport ? false, ffmpeg,
   nvttSupport ? false, nvidia-texture-tools,
   freetypeSupport ? true, freetype,
···
     ++ lib.optional gdalSupport gdal
     ++ lib.optional curlSupport curl
     ++ lib.optional colladaSupport collada-dom
-    ++ lib.optional opencascadeSupport opencascade
+    ++ lib.optional opencascadeSupport opencascade-occt
     ++ lib.optional ffmpegSupport ffmpeg
     ++ lib.optional nvttSupport nvidia-texture-tools
     ++ lib.optional freetypeSupport freetype
···
     ++ lib.optionals (!stdenv.isDarwin) [  ]
     ++ lib.optionals stdenv.isDarwin [ AGL Accelerate Carbon Cocoa Foundation ]
     ++ lib.optional (restSupport || colladaSupport) boost
-  ;
+    ;
+
+  patches = [
+    (fetchpatch {
+      name = "opencascade-api-patch";
+      url = "https://github.com/openscenegraph/OpenSceneGraph/commit/bc2daf9b3239c42d7e51ecd7947d31a92a7dc82b.patch";
+      hash = "sha256-VR8YKOV/YihB5eEGZOGaIfJNrig1EPS/PJmpKsK284c=";
+    })
+  ];
 
   cmakeFlags = lib.optional (!withApps) "-DBUILD_OSG_APPLICATIONS=OFF" ++ lib.optional withExamples "-DBUILD_OSG_EXAMPLES=ON";