opencascade: enable macOS build and add features

enable/fix macOS build and add options for TBB and GL2PS dependencies

VTK integration needed a patch because implicit conversions in initializer
lists are an error in C++11, which is the default in clang 7 used by nix.

pkgs/development/libraries/opencascade/default.nix

@@ -1,6 +1,9 @@
 { stdenv, fetchFromGitHub, fetchpatch, libGL, libGLU, libXmu, cmake, ninja,
-  pkgconfig, fontconfig, freetype, expat, freeimage, vtk }:
+  pkgconfig, fontconfig, freetype, expat, freeimage, vtk, gl2ps, tbb,
+  OpenCL, Cocoa
+}:
 
+with stdenv.lib;
 stdenv.mkDerivation rec {
   pname = "opencascade-oce";
   version = "0.18.3";
@@ -13,13 +16,21 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake ninja pkgconfig ];
-  buildInputs = [ libGL libGLU libXmu freetype fontconfig expat freeimage vtk ];
+  buildInputs = [
+    libGL libGLU libXmu freetype fontconfig expat freeimage vtk
+    gl2ps tbb
+  ]
+    ++ optionals stdenv.isDarwin [OpenCL Cocoa]
+  ;
 
   cmakeFlags = [
     "-DOCE_INSTALL_PREFIX=${placeholder "out"}"
     "-DOCE_WITH_FREEIMAGE=ON"
     "-DOCE_WITH_VTK=ON"
-  ];
+    "-DOCE_WITH_GL2PS=ON"
+    "-DOCE_MULTITHREAD_LIBRARY=TBB"
+  ]
+  ++ optionals stdenv.isDarwin ["-DOCE_OSX_USE_COCOA=ON" "-DOCE_WITH_OPENCL=ON"];
 
   patches = [
     # Use fontconfig instead of hardcoded directory list
@@ -33,6 +44,10 @@ stdenv.mkDerivation rec {
       url = "https://github.com/tpaviot/oce/commit/3b44656e93270d782009b06ec4be84d2a13f8126.patch";
       sha256 = "1ccakkcwy5g0184m23x0mnh22i0lk45xm8kgiv5z3pl7nh35dh8k";
     })
+    (fetchpatch {
+      url = "https://github.com/tpaviot/oce/commit/cf50d078cd5fac03a48fd204938bd240930a08dc.patch";
+      sha256 = "1xv94hcvggmb1c8vqwic1aiw9jw1sxk8mqbaak9xs9ycfqdvgdyc";
+    })
   ];
 
   postPatch = ''
@@ -41,11 +56,11 @@ stdenv.mkDerivation rec {
       --replace FONTCONFIG_LIBRARIES FONTCONFIG_LINK_LIBRARIES
   '';
 
-  meta = with stdenv.lib; {
+  meta = {
     description = "Open CASCADE Technology, libraries for 3D modeling and numerical simulation";
     homepage = "https://github.com/tpaviot/oce";
     maintainers = [ maintainers.viric ];
-    platforms = platforms.linux;
+    platforms = platforms.unix;
     license = licenses.lgpl21;
   };
 }

pkgs/top-level/all-packages.nix

@@ -14533,7 +14533,9 @@ in
 
   openbabel = callPackage ../development/libraries/openbabel { };
 
-  opencascade = callPackage ../development/libraries/opencascade { };
+  opencascade = callPackage ../development/libraries/opencascade {
+    inherit (darwin.apple_sdk.frameworks) OpenCL Cocoa;
+  };
   opencascade-occt = callPackage ../development/libraries/opencascade-occt { };
 
   opencl-headers = callPackage ../development/libraries/opencl-headers { };