From 063bfebb0e2c4eb85d07c8f410aa8515f0bcf079 Mon Sep 17 00:00:00 2001
From: hearga <hearga@gmail.com>
Date: Tue, 2 Sep 2025 09:49:05 -0400
Subject: [PATCH 1/6] Fix: vsg::Object cast<T>() sometimes returns nullptr on
 macOS Sonoma arm64 Release builds

---
 include/vsg/io/Input.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/vsg/io/Input.h b/include/vsg/io/Input.h
index 427021a6e8..0e11491a4e 100644
--- a/include/vsg/io/Input.h
+++ b/include/vsg/io/Input.h
@@ -219,7 +219,8 @@ namespace vsg
         {
             if (!matchPropertyName(propertyName)) return;
 
-            arg = read().cast<T>();
+            ref_ptr<Object> object = read();
+            arg = ref_ptr<T>(dynamic_cast<T*>(object.get()));
         }
 
         /// read a value of particular type

From 0135bfd448e7f04de77eaa24bdf71a98849ed09d Mon Sep 17 00:00:00 2001
From: hearga <hearga@gmail.com>
Date: Tue, 2 Sep 2025 16:51:35 -0400
Subject: [PATCH 2/6] Explicit template instantiation resolves the different
 type_info hash IDs during casting

---
 include/vsg/core/Array.h  |  1 +
 include/vsg/core/Export.h |  6 +++-
 include/vsg/io/Input.h    |  3 +-
 src/vsg/CMakeLists.txt    |  1 +
 src/vsg/core/Array.cpp    | 60 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 68 insertions(+), 3 deletions(-)
 create mode 100644 src/vsg/core/Array.cpp

diff --git a/include/vsg/core/Array.h b/include/vsg/core/Array.h
index ebc3209a14..dcda6a7883 100644
--- a/include/vsg/core/Array.h
+++ b/include/vsg/core/Array.h
@@ -24,6 +24,7 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 
 #define VSG_array(N, T)                                                  \
     using N = Array<T>;                                                  \
+    extern template class VSG_DECLSPEC vsg::Array<T>;                    \
     template<>                                                           \
     constexpr const char* type_name<N>() noexcept { return "vsg::" #N; } \
     template<>                                                           \
diff --git a/include/vsg/core/Export.h b/include/vsg/core/Export.h
index 3e46bcc17e..c5b5941f9d 100644
--- a/include/vsg/core/Export.h
+++ b/include/vsg/core/Export.h
@@ -25,5 +25,9 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 #        define VSG_DECLSPEC
 #    endif
 #else
-#    define VSG_DECLSPEC
+#    if defined(VSG_SHARED_LIBRARY) || defined(VSG_EXPORTS)
+#        define VSG_DECLSPEC __attribute__((visibility("default")))
+#    else
+#        define VSG_DECLSPEC
+#    endif
 #endif
diff --git a/include/vsg/io/Input.h b/include/vsg/io/Input.h
index 0e11491a4e..427021a6e8 100644
--- a/include/vsg/io/Input.h
+++ b/include/vsg/io/Input.h
@@ -219,8 +219,7 @@ namespace vsg
         {
             if (!matchPropertyName(propertyName)) return;
 
-            ref_ptr<Object> object = read();
-            arg = ref_ptr<T>(dynamic_cast<T*>(object.get()));
+            arg = read().cast<T>();
         }
 
         /// read a value of particular type
diff --git a/src/vsg/CMakeLists.txt b/src/vsg/CMakeLists.txt
index 26e87199aa..3504ac4435 100644
--- a/src/vsg/CMakeLists.txt
+++ b/src/vsg/CMakeLists.txt
@@ -11,6 +11,7 @@ endif()
 set(SOURCES
 
     core/Allocator.cpp
+    core/Array.cpp
     core/IntrusiveAllocator.cpp
     core/Auxiliary.cpp
     core/ConstVisitor.cpp
diff --git a/src/vsg/core/Array.cpp b/src/vsg/core/Array.cpp
new file mode 100644
index 0000000000..e2f29025de
--- /dev/null
+++ b/src/vsg/core/Array.cpp
@@ -0,0 +1,60 @@
+#include <vsg/core/Array.h>
+#include <vsg/state/material.h>
+#include <vsg/text/GlyphMetrics.h>
+#include <vsg/commands/DrawIndirectCommand.h>
+#include <vsg/maths/mat4.h>
+#include <vsg/maths/quat.h>
+#include <vsg/maths/vec2.h>
+#include <vsg/maths/vec3.h>
+#include <vsg/maths/vec4.h>
+#include <cstdint>
+#include <string>
+
+namespace vsg
+{
+    template class VSG_DECLSPEC vsg::Array<int8_t>;
+    template class VSG_DECLSPEC vsg::Array<uint8_t>;
+    template class VSG_DECLSPEC vsg::Array<int16_t>;
+    template class VSG_DECLSPEC vsg::Array<uint16_t>;
+    template class VSG_DECLSPEC vsg::Array<int32_t>;
+    template class VSG_DECLSPEC vsg::Array<uint32_t>;
+    template class VSG_DECLSPEC vsg::Array<float>;
+    template class VSG_DECLSPEC vsg::Array<double>;
+    template class VSG_DECLSPEC vsg::Array<std::string>;
+    template class VSG_DECLSPEC vsg::Array<vsg::vec2>;
+    template class VSG_DECLSPEC vsg::Array<vsg::vec3>;
+    template class VSG_DECLSPEC vsg::Array<vsg::vec4>;
+    template class VSG_DECLSPEC vsg::Array<vsg::dvec2>;
+    template class VSG_DECLSPEC vsg::Array<vsg::dvec3>;
+    template class VSG_DECLSPEC vsg::Array<vsg::dvec4>;
+    template class VSG_DECLSPEC vsg::Array<vsg::quat>;
+    template class VSG_DECLSPEC vsg::Array<vsg::dquat>;
+    template class VSG_DECLSPEC vsg::Array<vsg::bvec2>;
+    template class VSG_DECLSPEC vsg::Array<vsg::bvec3>;
+    template class VSG_DECLSPEC vsg::Array<vsg::bvec4>;
+    template class VSG_DECLSPEC vsg::Array<vsg::ubvec2>;
+    template class VSG_DECLSPEC vsg::Array<vsg::ubvec3>;
+    template class VSG_DECLSPEC vsg::Array<vsg::ubvec4>;
+
+    template class VSG_DECLSPEC vsg::Array<vsg::GlyphMetrics>;
+    template class VSG_DECLSPEC vsg::Array<vsg::PbrMaterial>;
+    template class VSG_DECLSPEC vsg::Array<vsg::PhongMaterial>;
+    template class VSG_DECLSPEC vsg::Array<vsg::DrawIndirectCommand>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_mat4<float>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_mat4<double>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_vec2<int>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_vec2<unsigned int>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_vec2<short>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_vec2<unsigned short>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_vec3<int>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_vec3<unsigned int>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_vec3<short>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_vec3<unsigned short>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_vec4<int>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_vec4<unsigned int>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_vec4<short>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::t_vec4<unsigned short>>;
+    template class VSG_DECLSPEC vsg::Array<vsg::block64>;
+    template class VSG_DECLSPEC vsg::Array<vsg::block128>;
+    template class VSG_DECLSPEC vsg::Array<vsg::material>;
+} // namespace vsg
\ No newline at end of file

From 62a47b1de7043023edfaaf1e2b2c2d87446e32ca Mon Sep 17 00:00:00 2001
From: hearga <hearga@gmail.com>
Date: Tue, 2 Sep 2025 18:39:13 -0400
Subject: [PATCH 3/6] - Add explicit template instantiations for:     -
 vsg::Array<vsg::DrawIndexedIndirectCommand>     -
 vsg::Array<vsg::VkGeometryInstance> - cast l.size() to uint32_t in assign()
 to match parameter type and avoid warnings - rename core/Array.cpp to
 core/ArrayInstantiations.cpp

---
 include/vsg/core/Array.h             |  2 +-
 src/vsg/CMakeLists.txt               |  2 +-
 src/vsg/core/Array.cpp               | 60 --------------------------
 src/vsg/core/ArrayInstantiations.cpp | 63 ++++++++++++++++++++++++++++
 4 files changed, 65 insertions(+), 62 deletions(-)
 delete mode 100644 src/vsg/core/Array.cpp
 create mode 100644 src/vsg/core/ArrayInstantiations.cpp

diff --git a/include/vsg/core/Array.h b/include/vsg/core/Array.h
index dcda6a7883..70baf5dfcd 100644
--- a/include/vsg/core/Array.h
+++ b/include/vsg/core/Array.h
@@ -102,7 +102,7 @@ namespace vsg
             _data(nullptr),
             _size(0)
         {
-            assign(data, offset, stride, l.size());
+            assign(data, offset, stride, static_cast<uint32_t>(l.size()));
 
             iterator itr = begin();
             for (const value_type& v : l) { (*itr++) = v; }
diff --git a/src/vsg/CMakeLists.txt b/src/vsg/CMakeLists.txt
index 3504ac4435..17f3af4b45 100644
--- a/src/vsg/CMakeLists.txt
+++ b/src/vsg/CMakeLists.txt
@@ -11,7 +11,7 @@ endif()
 set(SOURCES
 
     core/Allocator.cpp
-    core/Array.cpp
+    core/ArrayInstantiations.cpp
     core/IntrusiveAllocator.cpp
     core/Auxiliary.cpp
     core/ConstVisitor.cpp
diff --git a/src/vsg/core/Array.cpp b/src/vsg/core/Array.cpp
deleted file mode 100644
index e2f29025de..0000000000
--- a/src/vsg/core/Array.cpp
+++ /dev/null
@@ -1,60 +0,0 @@
-#include <vsg/core/Array.h>
-#include <vsg/state/material.h>
-#include <vsg/text/GlyphMetrics.h>
-#include <vsg/commands/DrawIndirectCommand.h>
-#include <vsg/maths/mat4.h>
-#include <vsg/maths/quat.h>
-#include <vsg/maths/vec2.h>
-#include <vsg/maths/vec3.h>
-#include <vsg/maths/vec4.h>
-#include <cstdint>
-#include <string>
-
-namespace vsg
-{
-    template class VSG_DECLSPEC vsg::Array<int8_t>;
-    template class VSG_DECLSPEC vsg::Array<uint8_t>;
-    template class VSG_DECLSPEC vsg::Array<int16_t>;
-    template class VSG_DECLSPEC vsg::Array<uint16_t>;
-    template class VSG_DECLSPEC vsg::Array<int32_t>;
-    template class VSG_DECLSPEC vsg::Array<uint32_t>;
-    template class VSG_DECLSPEC vsg::Array<float>;
-    template class VSG_DECLSPEC vsg::Array<double>;
-    template class VSG_DECLSPEC vsg::Array<std::string>;
-    template class VSG_DECLSPEC vsg::Array<vsg::vec2>;
-    template class VSG_DECLSPEC vsg::Array<vsg::vec3>;
-    template class VSG_DECLSPEC vsg::Array<vsg::vec4>;
-    template class VSG_DECLSPEC vsg::Array<vsg::dvec2>;
-    template class VSG_DECLSPEC vsg::Array<vsg::dvec3>;
-    template class VSG_DECLSPEC vsg::Array<vsg::dvec4>;
-    template class VSG_DECLSPEC vsg::Array<vsg::quat>;
-    template class VSG_DECLSPEC vsg::Array<vsg::dquat>;
-    template class VSG_DECLSPEC vsg::Array<vsg::bvec2>;
-    template class VSG_DECLSPEC vsg::Array<vsg::bvec3>;
-    template class VSG_DECLSPEC vsg::Array<vsg::bvec4>;
-    template class VSG_DECLSPEC vsg::Array<vsg::ubvec2>;
-    template class VSG_DECLSPEC vsg::Array<vsg::ubvec3>;
-    template class VSG_DECLSPEC vsg::Array<vsg::ubvec4>;
-
-    template class VSG_DECLSPEC vsg::Array<vsg::GlyphMetrics>;
-    template class VSG_DECLSPEC vsg::Array<vsg::PbrMaterial>;
-    template class VSG_DECLSPEC vsg::Array<vsg::PhongMaterial>;
-    template class VSG_DECLSPEC vsg::Array<vsg::DrawIndirectCommand>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_mat4<float>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_mat4<double>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_vec2<int>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_vec2<unsigned int>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_vec2<short>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_vec2<unsigned short>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_vec3<int>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_vec3<unsigned int>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_vec3<short>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_vec3<unsigned short>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_vec4<int>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_vec4<unsigned int>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_vec4<short>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::t_vec4<unsigned short>>;
-    template class VSG_DECLSPEC vsg::Array<vsg::block64>;
-    template class VSG_DECLSPEC vsg::Array<vsg::block128>;
-    template class VSG_DECLSPEC vsg::Array<vsg::material>;
-} // namespace vsg
\ No newline at end of file
diff --git a/src/vsg/core/ArrayInstantiations.cpp b/src/vsg/core/ArrayInstantiations.cpp
new file mode 100644
index 0000000000..09d0c818ca
--- /dev/null
+++ b/src/vsg/core/ArrayInstantiations.cpp
@@ -0,0 +1,63 @@
+#include <vsg/core/Array.h>
+#include <vsg/state/material.h>
+#include <vsg/text/GlyphMetrics.h>
+#include <vsg/commands/DrawIndirectCommand.h>
+#include <vsg/commands/DrawIndexedIndirectCommand.h>
+#include <vsg/raytracing/TopLevelAccelerationStructure.h>
+#include <vsg/maths/mat4.h>
+#include <vsg/maths/quat.h>
+#include <vsg/maths/vec2.h>
+#include <vsg/maths/vec3.h>
+#include <vsg/maths/vec4.h>
+
+namespace vsg
+{
+    template class VSG_DECLSPEC Array<int8_t>;
+    template class VSG_DECLSPEC Array<uint8_t>;
+    template class VSG_DECLSPEC Array<int16_t>;
+    template class VSG_DECLSPEC Array<uint16_t>;
+    template class VSG_DECLSPEC Array<int32_t>;
+    template class VSG_DECLSPEC Array<uint32_t>;
+    template class VSG_DECLSPEC Array<float>;
+    template class VSG_DECLSPEC Array<double>;
+    template class VSG_DECLSPEC Array<std::string>;
+    template class VSG_DECLSPEC Array<vec2>;
+    template class VSG_DECLSPEC Array<vec3>;
+    template class VSG_DECLSPEC Array<vec4>;
+    template class VSG_DECLSPEC Array<dvec2>;
+    template class VSG_DECLSPEC Array<dvec3>;
+    template class VSG_DECLSPEC Array<dvec4>;
+    template class VSG_DECLSPEC Array<quat>;
+    template class VSG_DECLSPEC Array<dquat>;
+    template class VSG_DECLSPEC Array<bvec2>;
+    template class VSG_DECLSPEC Array<bvec3>;
+    template class VSG_DECLSPEC Array<bvec4>;
+    template class VSG_DECLSPEC Array<ubvec2>;
+    template class VSG_DECLSPEC Array<ubvec3>;
+    template class VSG_DECLSPEC Array<ubvec4>;
+
+    template class VSG_DECLSPEC Array<GlyphMetrics>;
+    template class VSG_DECLSPEC Array<PbrMaterial>;
+    template class VSG_DECLSPEC Array<PhongMaterial>;
+    template class VSG_DECLSPEC Array<DrawIndirectCommand>;
+    template class VSG_DECLSPEC Array<DrawIndexedIndirectCommand>;
+    template class VSG_DECLSPEC Array<VkGeometryInstance>;
+
+    template class VSG_DECLSPEC Array<t_mat4<float>>;
+    template class VSG_DECLSPEC Array<t_mat4<double>>;
+    template class VSG_DECLSPEC Array<t_vec2<int>>;
+    template class VSG_DECLSPEC Array<t_vec2<unsigned int>>;
+    template class VSG_DECLSPEC Array<t_vec2<short>>;
+    template class VSG_DECLSPEC Array<t_vec2<unsigned short>>;
+    template class VSG_DECLSPEC Array<t_vec3<int>>;
+    template class VSG_DECLSPEC Array<t_vec3<unsigned int>>;
+    template class VSG_DECLSPEC Array<t_vec3<short>>;
+    template class VSG_DECLSPEC Array<t_vec3<unsigned short>>;
+    template class VSG_DECLSPEC Array<t_vec4<int>>;
+    template class VSG_DECLSPEC Array<t_vec4<unsigned int>>;
+    template class VSG_DECLSPEC Array<t_vec4<short>>;
+    template class VSG_DECLSPEC Array<t_vec4<unsigned short>>;
+    template class VSG_DECLSPEC Array<block64>;
+    template class VSG_DECLSPEC Array<block128>;
+    template class VSG_DECLSPEC Array<material>;
+} // namespace vsg
\ No newline at end of file

From e7994c6cfb52194279ee5120526b55a8892c75bb Mon Sep 17 00:00:00 2001
From: hearga <hearga@gmail.com>
Date: Tue, 9 Sep 2025 10:02:12 -0400
Subject: [PATCH 4/6] export Array<T> for stable typeid; optional keep a
 dynamic_cast escape hatch when desired; drop explicit instantiations

- CMake:
  * BUILD_SHARED_LIBS=OFF (static, Clang) -> by default define VSG_EXPORTS to export Array<T>;
    if VSG_USE_DYNAMIC_CAST is requested, define VSG_USE_DYNAMIC_CAST instead to switch cast<T>() to dynamic_cast.
- Remove ArrayInstantiations.cpp: explicit template instantiations are no longer needed.
---
 include/vsg/core/Array.h             |  3 +-
 include/vsg/core/Object.h            | 22 ++++++++--
 src/vsg/CMakeLists.txt               |  9 +++-
 src/vsg/core/ArrayInstantiations.cpp | 63 ----------------------------
 4 files changed, 27 insertions(+), 70 deletions(-)
 delete mode 100644 src/vsg/core/ArrayInstantiations.cpp

diff --git a/include/vsg/core/Array.h b/include/vsg/core/Array.h
index 70baf5dfcd..54cf113673 100644
--- a/include/vsg/core/Array.h
+++ b/include/vsg/core/Array.h
@@ -24,7 +24,6 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 
 #define VSG_array(N, T)                                                  \
     using N = Array<T>;                                                  \
-    extern template class VSG_DECLSPEC vsg::Array<T>;                    \
     template<>                                                           \
     constexpr const char* type_name<N>() noexcept { return "vsg::" #N; } \
     template<>                                                           \
@@ -34,7 +33,7 @@ namespace vsg
 {
 
     template<typename T>
-    class Array : public Data
+    class VSG_DECLSPEC Array : public Data
     {
     public:
         using value_type = T;
diff --git a/include/vsg/core/Object.h b/include/vsg/core/Object.h
index fce17f532b..1bbc1280ee 100644
--- a/include/vsg/core/Object.h
+++ b/include/vsg/core/Object.h
@@ -22,6 +22,12 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 #include <vsg/core/ref_ptr.h>
 #include <vsg/core/type_name.h>
 
+#ifdef VSG_USE_DYNAMIC_CAST
+    #define VSG_CAST_DYNAMIC
+#else
+    #undef VSG_CAST_DYNAMIC
+#endif
+
 namespace vsg
 {
 
@@ -85,11 +91,19 @@ namespace vsg
         virtual const std::type_info& type_info() const noexcept { return typeid(Object); }
         virtual bool is_compatible(const std::type_info& type) const noexcept { return typeid(Object) == type; }
 
-        template<class T>
-        T* cast() { return is_compatible(typeid(T)) ? static_cast<T*>(this) : nullptr; }
+        #ifdef VSG_CAST_DYNAMIC  
+            template<class T>
+            T* cast() { return dynamic_cast<T*>(this); }
 
-        template<class T>
-        const T* cast() const { return is_compatible(typeid(T)) ? static_cast<const T*>(this) : nullptr; }
+            template<class T>
+            const T* cast() const { return dynamic_cast<const T*>(this); }
+        #else
+            template<class T>
+            T* cast() { return is_compatible(typeid(T)) ? static_cast<T*>(this) : nullptr; }
+
+            template<class T>
+            const T* cast() const { return is_compatible(typeid(T)) ? static_cast<const T*>(this) : nullptr; }
+        #endif
 
         /// clone this object using CopyOp's duplicates map to decide whether to clone or to return the original object.
         /// The default clone(CopyOp&) implementation simply returns ref_ptr<> to this object rather attempt to clone.
diff --git a/src/vsg/CMakeLists.txt b/src/vsg/CMakeLists.txt
index 17f3af4b45..1a8fa27ff0 100644
--- a/src/vsg/CMakeLists.txt
+++ b/src/vsg/CMakeLists.txt
@@ -11,7 +11,6 @@ endif()
 set(SOURCES
 
     core/Allocator.cpp
-    core/ArrayInstantiations.cpp
     core/IntrusiveAllocator.cpp
     core/Auxiliary.cpp
     core/ConstVisitor.cpp
@@ -427,6 +426,14 @@ target_link_libraries(vsg ${LIBRARIES})
 
 if (BUILD_SHARED_LIBS)
     target_compile_definitions(vsg INTERFACE VSG_SHARED_LIBRARY)
+else()
+    if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+        if (VSG_USE_DYNAMIC_CAST)
+            target_compile_definitions(vsg PRIVATE VSG_USE_DYNAMIC_CAST)
+        else ()
+            target_compile_definitions(vsg PRIVATE VSG_EXPORTS)
+        endif ()
+    endif()
 endif()
 
 # install headers
diff --git a/src/vsg/core/ArrayInstantiations.cpp b/src/vsg/core/ArrayInstantiations.cpp
deleted file mode 100644
index 09d0c818ca..0000000000
--- a/src/vsg/core/ArrayInstantiations.cpp
+++ /dev/null
@@ -1,63 +0,0 @@
-#include <vsg/core/Array.h>
-#include <vsg/state/material.h>
-#include <vsg/text/GlyphMetrics.h>
-#include <vsg/commands/DrawIndirectCommand.h>
-#include <vsg/commands/DrawIndexedIndirectCommand.h>
-#include <vsg/raytracing/TopLevelAccelerationStructure.h>
-#include <vsg/maths/mat4.h>
-#include <vsg/maths/quat.h>
-#include <vsg/maths/vec2.h>
-#include <vsg/maths/vec3.h>
-#include <vsg/maths/vec4.h>
-
-namespace vsg
-{
-    template class VSG_DECLSPEC Array<int8_t>;
-    template class VSG_DECLSPEC Array<uint8_t>;
-    template class VSG_DECLSPEC Array<int16_t>;
-    template class VSG_DECLSPEC Array<uint16_t>;
-    template class VSG_DECLSPEC Array<int32_t>;
-    template class VSG_DECLSPEC Array<uint32_t>;
-    template class VSG_DECLSPEC Array<float>;
-    template class VSG_DECLSPEC Array<double>;
-    template class VSG_DECLSPEC Array<std::string>;
-    template class VSG_DECLSPEC Array<vec2>;
-    template class VSG_DECLSPEC Array<vec3>;
-    template class VSG_DECLSPEC Array<vec4>;
-    template class VSG_DECLSPEC Array<dvec2>;
-    template class VSG_DECLSPEC Array<dvec3>;
-    template class VSG_DECLSPEC Array<dvec4>;
-    template class VSG_DECLSPEC Array<quat>;
-    template class VSG_DECLSPEC Array<dquat>;
-    template class VSG_DECLSPEC Array<bvec2>;
-    template class VSG_DECLSPEC Array<bvec3>;
-    template class VSG_DECLSPEC Array<bvec4>;
-    template class VSG_DECLSPEC Array<ubvec2>;
-    template class VSG_DECLSPEC Array<ubvec3>;
-    template class VSG_DECLSPEC Array<ubvec4>;
-
-    template class VSG_DECLSPEC Array<GlyphMetrics>;
-    template class VSG_DECLSPEC Array<PbrMaterial>;
-    template class VSG_DECLSPEC Array<PhongMaterial>;
-    template class VSG_DECLSPEC Array<DrawIndirectCommand>;
-    template class VSG_DECLSPEC Array<DrawIndexedIndirectCommand>;
-    template class VSG_DECLSPEC Array<VkGeometryInstance>;
-
-    template class VSG_DECLSPEC Array<t_mat4<float>>;
-    template class VSG_DECLSPEC Array<t_mat4<double>>;
-    template class VSG_DECLSPEC Array<t_vec2<int>>;
-    template class VSG_DECLSPEC Array<t_vec2<unsigned int>>;
-    template class VSG_DECLSPEC Array<t_vec2<short>>;
-    template class VSG_DECLSPEC Array<t_vec2<unsigned short>>;
-    template class VSG_DECLSPEC Array<t_vec3<int>>;
-    template class VSG_DECLSPEC Array<t_vec3<unsigned int>>;
-    template class VSG_DECLSPEC Array<t_vec3<short>>;
-    template class VSG_DECLSPEC Array<t_vec3<unsigned short>>;
-    template class VSG_DECLSPEC Array<t_vec4<int>>;
-    template class VSG_DECLSPEC Array<t_vec4<unsigned int>>;
-    template class VSG_DECLSPEC Array<t_vec4<short>>;
-    template class VSG_DECLSPEC Array<t_vec4<unsigned short>>;
-    template class VSG_DECLSPEC Array<block64>;
-    template class VSG_DECLSPEC Array<block128>;
-    template class VSG_DECLSPEC Array<material>;
-} // namespace vsg
\ No newline at end of file

From b7d2c30c0bf0d283c37e0a142a36bc1527bff564 Mon Sep 17 00:00:00 2001
From: hearga <hearga@gmail.com>
Date: Tue, 9 Sep 2025 11:05:37 -0400
Subject: [PATCH 5/6] retrigger checks


From 4bd274f4e096980e3c1b67ad178848009c009dd5 Mon Sep 17 00:00:00 2001
From: hearga <hearga@gmail.com>
Date: Mon, 24 Nov 2025 10:36:01 -0500
Subject: [PATCH 6/6] Apply VSG_DECLSPEC to Array2D, Array3D, and Value; move
 VSG_USE_DYNAMIC_CAST to version.h.in

---
 CMakeLists.txt             |  2 ++
 include/vsg/core/Array.h   |  2 +-
 include/vsg/core/Array2D.h |  2 +-
 include/vsg/core/Array3D.h |  2 +-
 include/vsg/core/Object.h  |  8 +-------
 include/vsg/core/Value.h   |  2 +-
 src/vsg/CMakeLists.txt     | 12 ++++--------
 src/vsg/core/Version.h.in  |  3 +++
 8 files changed, 14 insertions(+), 19 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 62940f9835..e1c1106eff 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -98,6 +98,8 @@ if (VSG_SUPPORTS_Windowing)
     endif()
 endif()
 
+set(VSG_USE_DYNAMIC_CAST 0 CACHE STRING "Use dynamic_cast in vsg::Object::cast<T>(), 0 for off, 1 for enabled." )
+
 # this line needs to be after the call to setup_build_vars()
 configure_file("${VSG_SOURCE_DIR}/src/vsg/core/Version.h.in" "${VSG_VERSION_HEADER}")
 
diff --git a/include/vsg/core/Array.h b/include/vsg/core/Array.h
index 54cf113673..0ea11486d8 100644
--- a/include/vsg/core/Array.h
+++ b/include/vsg/core/Array.h
@@ -101,7 +101,7 @@ namespace vsg
             _data(nullptr),
             _size(0)
         {
-            assign(data, offset, stride, static_cast<uint32_t>(l.size()));
+            assign(data, offset, stride, l.size());
 
             iterator itr = begin();
             for (const value_type& v : l) { (*itr++) = v; }
diff --git a/include/vsg/core/Array2D.h b/include/vsg/core/Array2D.h
index 999b423e32..47cdadb7d9 100644
--- a/include/vsg/core/Array2D.h
+++ b/include/vsg/core/Array2D.h
@@ -31,7 +31,7 @@ namespace vsg
 {
 
     template<typename T>
-    class Array2D : public Data
+    class VSG_DECLSPEC Array2D : public Data
     {
     public:
         using value_type = T;
diff --git a/include/vsg/core/Array3D.h b/include/vsg/core/Array3D.h
index 033bf9d84c..510727ab7e 100644
--- a/include/vsg/core/Array3D.h
+++ b/include/vsg/core/Array3D.h
@@ -30,7 +30,7 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 namespace vsg
 {
     template<typename T>
-    class Array3D : public Data
+    class VSG_DECLSPEC Array3D : public Data
     {
     public:
         using value_type = T;
diff --git a/include/vsg/core/Object.h b/include/vsg/core/Object.h
index 1bbc1280ee..2088eaa262 100644
--- a/include/vsg/core/Object.h
+++ b/include/vsg/core/Object.h
@@ -22,12 +22,6 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 #include <vsg/core/ref_ptr.h>
 #include <vsg/core/type_name.h>
 
-#ifdef VSG_USE_DYNAMIC_CAST
-    #define VSG_CAST_DYNAMIC
-#else
-    #undef VSG_CAST_DYNAMIC
-#endif
-
 namespace vsg
 {
 
@@ -91,7 +85,7 @@ namespace vsg
         virtual const std::type_info& type_info() const noexcept { return typeid(Object); }
         virtual bool is_compatible(const std::type_info& type) const noexcept { return typeid(Object) == type; }
 
-        #ifdef VSG_CAST_DYNAMIC  
+        #if VSG_USE_DYNAMIC_CAST == 1
             template<class T>
             T* cast() { return dynamic_cast<T*>(this); }
 
diff --git a/include/vsg/core/Value.h b/include/vsg/core/Value.h
index c813bd456c..4aab22ec89 100644
--- a/include/vsg/core/Value.h
+++ b/include/vsg/core/Value.h
@@ -36,7 +36,7 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 namespace vsg
 {
     template<typename T>
-    class Value : public Data
+    class VSG_DECLSPEC Value : public Data
     {
     public:
         using value_type = T;
diff --git a/src/vsg/CMakeLists.txt b/src/vsg/CMakeLists.txt
index 1a8fa27ff0..1d90a0c217 100644
--- a/src/vsg/CMakeLists.txt
+++ b/src/vsg/CMakeLists.txt
@@ -426,14 +426,10 @@ target_link_libraries(vsg ${LIBRARIES})
 
 if (BUILD_SHARED_LIBS)
     target_compile_definitions(vsg INTERFACE VSG_SHARED_LIBRARY)
-else()
-    if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-        if (VSG_USE_DYNAMIC_CAST)
-            target_compile_definitions(vsg PRIVATE VSG_USE_DYNAMIC_CAST)
-        else ()
-            target_compile_definitions(vsg PRIVATE VSG_EXPORTS)
-        endif ()
-    endif()
+elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT VSG_USE_DYNAMIC_CAST)
+    # Static build, Clang, and we are not using dynamic_cast:
+    # export Array/Value/etc. to stabilize typeid.
+    target_compile_definitions(vsg PRIVATE VSG_EXPORTS)
 endif()
 
 # install headers
diff --git a/src/vsg/core/Version.h.in b/src/vsg/core/Version.h.in
index 1926da8292..2fdf97735b 100644
--- a/src/vsg/core/Version.h.in
+++ b/src/vsg/core/Version.h.in
@@ -45,6 +45,9 @@ extern "C"
     /// Native Windowing support provided with vsg::Window::create(windowTraits) enabled when 1, disabled when 0
     #define VSG_SUPPORTS_Windowing @VSG_SUPPORTS_Windowing@
 
+    /// Define VSG_USE_DYNAMIC_CAST to avoid typeid(T) comparisons in vsg::Object::cast<T>()
+    #define VSG_USE_DYNAMIC_CAST @VSG_USE_DYNAMIC_CAST@
+
     struct VsgVersion
     {
         unsigned int major;