diff --git a/code/AssetLib/FBX/FBXConverter.cpp b/code/AssetLib/FBX/FBXConverter.cpp
index e2f43b885..d45919e10 100644
--- a/code/AssetLib/FBX/FBXConverter.cpp
+++ b/code/AssetLib/FBX/FBXConverter.cpp
@@ -1455,7 +1455,9 @@ static void copyBoneToSkeletonBone(aiMesh *mesh, aiBone *bone, aiSkeletonBone *s
     skeletonBone->mWeights = bone->mWeights;
     skeletonBone->mOffsetMatrix = bone->mOffsetMatrix;
     skeletonBone->mMeshId = mesh;
+#ifndef ASSIMP_BUILD_NO_ARMATUREPOPULATE_PROCESS
     skeletonBone->mNode = bone->mNode;
+#endif
     skeletonBone->mParent = -1;
 }
 
diff --git a/code/PostProcessing/JoinVerticesProcess.cpp b/code/PostProcessing/JoinVerticesProcess.cpp
index 0423ab5c2..3bf96afeb 100644
--- a/code/PostProcessing/JoinVerticesProcess.cpp
+++ b/code/PostProcessing/JoinVerticesProcess.cpp
@@ -264,12 +264,12 @@ int JoinVerticesProcess::ProcessMesh( aiMesh* pMesh, unsigned int meshIndex) {
     // We should care only about used vertices, not all of them
     // (this can happen due to original file vertices buffer being used by
     // multiple meshes)
-    std::unordered_set<unsigned int> usedVertexIndices;
-    usedVertexIndices.reserve(pMesh->mNumVertices);
-    for( unsigned int a = 0; a < pMesh->mNumFaces; a++) {
+    std::vector<bool> usedVertexIndicesMask;
+    usedVertexIndicesMask.resize(pMesh->mNumVertices, false);
+    for (unsigned int a = 0; a < pMesh->mNumFaces; a++) {
         aiFace& face = pMesh->mFaces[a];
-        for( unsigned int b = 0; b < face.mNumIndices; b++) {
-            usedVertexIndices.insert(face.mIndices[b]);
+        for (unsigned int b = 0; b < face.mNumIndices; b++) {
+            usedVertexIndicesMask[face.mIndices[b]] = true;
         }
     }
 
@@ -335,7 +335,7 @@ int JoinVerticesProcess::ProcessMesh( aiMesh* pMesh, unsigned int meshIndex) {
     int newIndex = 0;
     for( unsigned int a = 0; a < pMesh->mNumVertices; a++)  {
         // if the vertex is unused Do nothing
-        if (usedVertexIndices.find(a) == usedVertexIndices.end()) {
+        if (!usedVertexIndicesMask[a]) {
             continue;
         }
         // collect the vertex data
diff --git a/include/assimp/anim.h b/include/assimp/anim.h
index edb048f50..49f0d5014 100644
--- a/include/assimp/anim.h
+++ b/include/assimp/anim.h
@@ -198,7 +198,10 @@ struct aiMeshMorphKey {
     /** The time of this key */
     double mTime;
 
-    /** The values and weights at the time of this key */
+    /** The values and weights at the time of this key
+     *   - mValues: index of attachment mesh to apply weight at the same position in mWeights
+     *   - mWeights: weight to apply to the blend shape index at the same position in mValues
+     */
     unsigned int *mValues;
     double *mWeights;
 
diff --git a/include/assimp/mesh.h b/include/assimp/mesh.h
index 363627464..16cd4fa3c 100644
--- a/include/assimp/mesh.h
+++ b/include/assimp/mesh.h
@@ -737,13 +737,20 @@ struct aiMesh {
      **/
     C_STRUCT aiString mName;
 
-    /** The number of attachment meshes. Note! Currently only works with Collada loader. */
+    /** The number of attachment meshes.
+     *  Currently known to work with loaders:
+     *   - Collada
+     *   - gltf
+     */
     unsigned int mNumAnimMeshes;
 
     /** Attachment meshes for this mesh, for vertex-based animation.
      *  Attachment meshes carry replacement data for some of the
      *  mesh'es vertex components (usually positions, normals).
-     *  Note! Currently only works with Collada loader.*/
+     *  Currently known to work with loaders:
+     *   - Collada
+     *   - gltf
+     */
     C_STRUCT aiAnimMesh **mAnimMeshes;
 
     /**
@@ -988,8 +995,10 @@ struct aiSkeletonBone {
 #ifdef __cplusplus
     aiSkeletonBone() :
             mParent(-1),
+#ifndef ASSIMP_BUILD_NO_ARMATUREPOPULATE_PROCESS
             mArmature(nullptr),
             mNode(nullptr),
+#endif
             mNumnWeights(0),
             mMeshId(nullptr),
             mWeights(nullptr),
diff --git a/port/PyAssimp/pyassimp/structs.py b/port/PyAssimp/pyassimp/structs.py
index e1fba1950..932998025 100644
--- a/port/PyAssimp/pyassimp/structs.py
+++ b/port/PyAssimp/pyassimp/structs.py
@@ -748,13 +748,18 @@ class Mesh(Structure):
             #   - Vertex animations refer to meshes by their names.
             ("mName", String),
 
-            # The number of attachment meshes. Note! Currently only works with Collada loader.
+            # The number of attachment meshes. 
+            # Currently known to work with loaders:
+            #  - Collada
+            #  - gltf
             ("mNumAnimMeshes", c_uint),
 
             # Attachment meshes for this mesh, for vertex-based animation.
             # Attachment meshes carry replacement data for some of the
             # mesh'es vertex components (usually positions, normals).
-            # Note! Currently only works with Collada loader.
+            # Currently known to work with loaders:
+            #  - Collada
+            #  - gltf
             ("mAnimMeshes", POINTER(POINTER(AnimMesh))),
 
             # Method of morphing when animeshes are specified.
diff --git a/port/iOS/build.sh b/port/iOS/build.sh
index 335b450d1..099bd8b0f 100755
--- a/port/iOS/build.sh
+++ b/port/iOS/build.sh
@@ -76,7 +76,7 @@ build_arch()
 
     rm CMakeCache.txt
     
-    CMAKE_CLI_INPUT="-DCMAKE_C_COMPILER=$CMAKE_C_COMPILER -DCMAKE_CXX_COMPILER=$CMAKE_CXX_COMPILER -DCMAKE_TOOLCHAIN_FILE=./port/iOS/IPHONEOS_$(echo $1 | tr '[:lower:]' '[:upper:]')_TOOLCHAIN.cmake -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DENABLE_BOOST_WORKAROUND=ON -DBUILD_SHARED_LIBS=$BUILD_SHARED_LIBS"
+    CMAKE_CLI_INPUT="-DCMAKE_C_COMPILER=$CMAKE_C_COMPILER -DCMAKE_CXX_COMPILER=$CMAKE_CXX_COMPILER -DCMAKE_TOOLCHAIN_FILE=./port/iOS/IPHONEOS_$(echo $1 | tr '[:lower:]' '[:upper:]')_TOOLCHAIN.cmake -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DBUILD_SHARED_LIBS=$BUILD_SHARED_LIBS"
     
     echo "[!] Running CMake with -G 'Unix Makefiles' $CMAKE_CLI_INPUT"
     
@@ -190,12 +190,8 @@ if [[ "$DEPLOY_FAT" -eq 1 ]]; then
     
     if [[ "$BUILD_TYPE" =~ "Debug" ]]; then
     	make_fat_static_or_shared_binary 'libassimpd'
-	    make_fat_static_binary 'libIrrXMLd'
-	    make_fat_static_binary 'libzlibstaticd'
 	else
 		make_fat_static_or_shared_binary 'libassimp'
-	    make_fat_static_binary 'libIrrXML'
-	    make_fat_static_binary 'libzlibstatic'
 	fi
     
     echo "[!] Done! The fat binaries can be found at $BUILD_DIR"