diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3b0a27409b..7a8b358242 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,6 +7,7 @@ option(FLECS_STATIC "Build static flecs lib" ON)
 option(FLECS_SHARED "Build shared flecs lib" ON)
 option(FLECS_PIC "Compile static flecs lib with position independent code (PIC)" ON)
 option(FLECS_TESTS "Build flecs tests" OFF)
+option(FLECS_M0DULE "Build flecs C++20 module" OFF)
 
 include(cmake/target_default_compile_warnings.cmake)
 include(cmake/target_default_compile_options.cmake)
@@ -75,6 +76,10 @@ if(FLECS_TESTS)
     add_subdirectory(test)
 endif()
 
+if(FLECS_M0DULE)
+    add_subdirectory(module)
+endif()
+
 message(STATUS "Targets: ${FLECS_TARGETS}")
 
 # define the install steps
diff --git a/distr/flecs.h b/distr/flecs.h
index 1db12b5aaa..bda89f1ae6 100644
--- a/distr/flecs.h
+++ b/distr/flecs.h
@@ -16405,6 +16405,7 @@ ecs_entity_t ecs_module_init(
 #ifdef FLECS_NO_CPP
 #error "FLECS_NO_CPP failed: CPP is required by other addons"
 #endif
+
 /**
  * @file addons/flecs_cpp.h
  * @brief C++ utility functions
@@ -16541,6 +16542,8 @@ const ecs_member_t* ecs_cpp_last_member(
 #endif // FLECS_CPP
 
 
+#ifndef FLECS_CPP20_MODULE_HEADER
+
 #ifdef __cplusplus
 /**
  * @file addons/cpp/flecs.hpp
@@ -16550,7 +16553,17 @@ const ecs_member_t* ecs_cpp_last_member(
 #pragma once
 
 // STL includes
+#ifndef FLECS_CUSTOM_STD_INCLUDE
 #include <type_traits>
+#endif
+
+#ifndef FLECS_API_STRUCT
+#define FLECS_API_STRUCT
+#endif
+
+#ifndef FLECS_API_GLOBAL
+#define FLECS_API_GLOBAL static
+#endif
 
 /**
  * @defgroup cpp C++ API
@@ -16560,19 +16573,21 @@ const ecs_member_t* ecs_cpp_last_member(
 namespace flecs
 {
 
-struct world;
-struct world_async_stage;
-struct iter;
-struct entity_view;
-struct entity;
-struct type;
-struct table;
-struct table_range;
-struct untyped_component;
-
+FLECS_API_STRUCT struct world;
+FLECS_API_STRUCT struct world_async_stage;
+FLECS_API_STRUCT struct iter;
+FLECS_API_STRUCT struct entity_view;
+FLECS_API_STRUCT struct entity;
+FLECS_API_STRUCT struct type;
+FLECS_API_STRUCT struct table;
+FLECS_API_STRUCT struct table_range;
+FLECS_API_STRUCT struct untyped_component;
+
+FLECS_API_STRUCT
 template <typename T>
 struct component;
 
+FLECS_API_STRUCT
 template <typename T>
 struct ref;
 
@@ -16663,96 +16678,96 @@ using Poly = EcsPoly;
 using DefaultChildComponent = EcsDefaultChildComponent;
 
 /* Builtin tags */
-static const flecs::entity_t Query = EcsQuery;
-static const flecs::entity_t Observer = EcsObserver;
-static const flecs::entity_t Private = EcsPrivate;
-static const flecs::entity_t Module = EcsModule;
-static const flecs::entity_t Prefab = EcsPrefab;
-static const flecs::entity_t Disabled = EcsDisabled;
-static const flecs::entity_t Empty = EcsEmpty;
-static const flecs::entity_t Monitor = EcsMonitor;
-static const flecs::entity_t System = EcsSystem;
-static const flecs::entity_t Pipeline = ecs_id(EcsPipeline);
-static const flecs::entity_t Phase = EcsPhase;
+FLECS_API_GLOBAL const flecs::entity_t Query = EcsQuery;
+FLECS_API_GLOBAL const flecs::entity_t Observer = EcsObserver;
+FLECS_API_GLOBAL const flecs::entity_t Private = EcsPrivate;
+FLECS_API_GLOBAL const flecs::entity_t Module = EcsModule;
+FLECS_API_GLOBAL const flecs::entity_t Prefab = EcsPrefab;
+FLECS_API_GLOBAL const flecs::entity_t Disabled = EcsDisabled;
+FLECS_API_GLOBAL const flecs::entity_t Empty = EcsEmpty;
+FLECS_API_GLOBAL const flecs::entity_t Monitor = EcsMonitor;
+FLECS_API_GLOBAL const flecs::entity_t System = EcsSystem;
+FLECS_API_GLOBAL const flecs::entity_t Pipeline = ecs_id(EcsPipeline);
+FLECS_API_GLOBAL const flecs::entity_t Phase = EcsPhase;
 
 /* Builtin event tags */
-static const flecs::entity_t OnAdd = EcsOnAdd;
-static const flecs::entity_t OnRemove = EcsOnRemove;
-static const flecs::entity_t OnSet = EcsOnSet;
-static const flecs::entity_t OnTableCreate = EcsOnTableCreate;
-static const flecs::entity_t OnTableDelete = EcsOnTableDelete;
+FLECS_API_GLOBAL const flecs::entity_t OnAdd = EcsOnAdd;
+FLECS_API_GLOBAL const flecs::entity_t OnRemove = EcsOnRemove;
+FLECS_API_GLOBAL const flecs::entity_t OnSet = EcsOnSet;
+FLECS_API_GLOBAL const flecs::entity_t OnTableCreate = EcsOnTableCreate;
+FLECS_API_GLOBAL const flecs::entity_t OnTableDelete = EcsOnTableDelete;
 
 /* Builtin term flags */
-static const uint64_t Self = EcsSelf;
-static const uint64_t Up = EcsUp;
-static const uint64_t Trav = EcsTrav;
-static const uint64_t Cascade = EcsCascade;
-static const uint64_t Desc = EcsDesc;
-static const uint64_t IsVariable = EcsIsVariable;
-static const uint64_t IsEntity = EcsIsEntity;
-static const uint64_t IsName = EcsIsName;
-static const uint64_t TraverseFlags = EcsTraverseFlags;
-static const uint64_t TermRefFlags = EcsTermRefFlags;
+FLECS_API_GLOBAL const uint64_t Self = EcsSelf;
+FLECS_API_GLOBAL const uint64_t Up = EcsUp;
+FLECS_API_GLOBAL const uint64_t Trav = EcsTrav;
+FLECS_API_GLOBAL const uint64_t Cascade = EcsCascade;
+FLECS_API_GLOBAL const uint64_t Desc = EcsDesc;
+FLECS_API_GLOBAL const uint64_t IsVariable = EcsIsVariable;
+FLECS_API_GLOBAL const uint64_t IsEntity = EcsIsEntity;
+FLECS_API_GLOBAL const uint64_t IsName = EcsIsName;
+FLECS_API_GLOBAL const uint64_t TraverseFlags = EcsTraverseFlags;
+FLECS_API_GLOBAL const uint64_t TermRefFlags = EcsTermRefFlags;
 
 /* Builtin entity ids */
-static const flecs::entity_t Flecs = EcsFlecs;
-static const flecs::entity_t FlecsCore = EcsFlecsCore;
-static const flecs::entity_t World = EcsWorld;
+FLECS_API_GLOBAL const flecs::entity_t Flecs = EcsFlecs;
+FLECS_API_GLOBAL const flecs::entity_t FlecsCore = EcsFlecsCore;
+FLECS_API_GLOBAL const flecs::entity_t World = EcsWorld;
 
 /* Component traits */
-static const flecs::entity_t Wildcard = EcsWildcard;
-static const flecs::entity_t Any = EcsAny;
-static const flecs::entity_t This = EcsThis;
-static const flecs::entity_t Transitive = EcsTransitive;
-static const flecs::entity_t Reflexive = EcsReflexive;
-static const flecs::entity_t Final = EcsFinal;
-static const flecs::entity_t PairIsTag = EcsPairIsTag;
-static const flecs::entity_t Exclusive = EcsExclusive;
-static const flecs::entity_t Acyclic = EcsAcyclic;
-static const flecs::entity_t Traversable = EcsTraversable;
-static const flecs::entity_t Symmetric = EcsSymmetric;
-static const flecs::entity_t With = EcsWith;
-static const flecs::entity_t OneOf = EcsOneOf;
-static const flecs::entity_t Trait = EcsTrait;
-static const flecs::entity_t Relationship = EcsRelationship;
-static const flecs::entity_t Target = EcsTarget;
-static const flecs::entity_t CanToggle = EcsCanToggle;
+FLECS_API_GLOBAL const flecs::entity_t Wildcard = EcsWildcard;
+FLECS_API_GLOBAL const flecs::entity_t Any = EcsAny;
+FLECS_API_GLOBAL const flecs::entity_t This = EcsThis;
+FLECS_API_GLOBAL const flecs::entity_t Transitive = EcsTransitive;
+FLECS_API_GLOBAL const flecs::entity_t Reflexive = EcsReflexive;
+FLECS_API_GLOBAL const flecs::entity_t Final = EcsFinal;
+FLECS_API_GLOBAL const flecs::entity_t PairIsTag = EcsPairIsTag;
+FLECS_API_GLOBAL const flecs::entity_t Exclusive = EcsExclusive;
+FLECS_API_GLOBAL const flecs::entity_t Acyclic = EcsAcyclic;
+FLECS_API_GLOBAL const flecs::entity_t Traversable = EcsTraversable;
+FLECS_API_GLOBAL const flecs::entity_t Symmetric = EcsSymmetric;
+FLECS_API_GLOBAL const flecs::entity_t With = EcsWith;
+FLECS_API_GLOBAL const flecs::entity_t OneOf = EcsOneOf;
+FLECS_API_GLOBAL const flecs::entity_t Trait = EcsTrait;
+FLECS_API_GLOBAL const flecs::entity_t Relationship = EcsRelationship;
+FLECS_API_GLOBAL const flecs::entity_t Target = EcsTarget;
+FLECS_API_GLOBAL const flecs::entity_t CanToggle = EcsCanToggle;
 
 /* OnInstantiate trait */
-static const flecs::entity_t OnInstantiate = EcsOnInstantiate;
-static const flecs::entity_t Override = EcsOverride;
-static const flecs::entity_t Inherit = EcsInherit;
-static const flecs::entity_t DontInherit = EcsDontInherit;
+FLECS_API_GLOBAL const flecs::entity_t OnInstantiate = EcsOnInstantiate;
+FLECS_API_GLOBAL const flecs::entity_t Override = EcsOverride;
+FLECS_API_GLOBAL const flecs::entity_t Inherit = EcsInherit;
+FLECS_API_GLOBAL const flecs::entity_t DontInherit = EcsDontInherit;
 
 /* OnDelete/OnDeleteTarget traits */
-static const flecs::entity_t OnDelete = EcsOnDelete;
-static const flecs::entity_t OnDeleteTarget = EcsOnDeleteTarget;
-static const flecs::entity_t Remove = EcsRemove;
-static const flecs::entity_t Delete = EcsDelete;
-static const flecs::entity_t Panic = EcsPanic;
+FLECS_API_GLOBAL const flecs::entity_t OnDelete = EcsOnDelete;
+FLECS_API_GLOBAL const flecs::entity_t OnDeleteTarget = EcsOnDeleteTarget;
+FLECS_API_GLOBAL const flecs::entity_t Remove = EcsRemove;
+FLECS_API_GLOBAL const flecs::entity_t Delete = EcsDelete;
+FLECS_API_GLOBAL const flecs::entity_t Panic = EcsPanic;
 
 /* Builtin relationships */
-static const flecs::entity_t IsA = EcsIsA;
-static const flecs::entity_t ChildOf = EcsChildOf;
-static const flecs::entity_t DependsOn = EcsDependsOn;
-static const flecs::entity_t SlotOf = EcsSlotOf;
+FLECS_API_GLOBAL const flecs::entity_t IsA = EcsIsA;
+FLECS_API_GLOBAL const flecs::entity_t ChildOf = EcsChildOf;
+FLECS_API_GLOBAL const flecs::entity_t DependsOn = EcsDependsOn;
+FLECS_API_GLOBAL const flecs::entity_t SlotOf = EcsSlotOf;
 
 /* Builtin identifiers */
-static const flecs::entity_t Name = EcsName;
-static const flecs::entity_t Symbol = EcsSymbol;
+FLECS_API_GLOBAL const flecs::entity_t Name = EcsName;
+FLECS_API_GLOBAL const flecs::entity_t Symbol = EcsSymbol;
 
 /* Storage */
-static const flecs::entity_t Sparse = EcsSparse;
-static const flecs::entity_t Union = EcsUnion;
+FLECS_API_GLOBAL const flecs::entity_t Sparse = EcsSparse;
+FLECS_API_GLOBAL const flecs::entity_t Union = EcsUnion;
 
 /* Builtin predicates for comparing entity ids in queries. */
-static const flecs::entity_t PredEq = EcsPredEq;
-static const flecs::entity_t PredMatch = EcsPredMatch;
-static const flecs::entity_t PredLookup = EcsPredLookup;
+FLECS_API_GLOBAL const flecs::entity_t PredEq = EcsPredEq;
+FLECS_API_GLOBAL const flecs::entity_t PredMatch = EcsPredMatch;
+FLECS_API_GLOBAL const flecs::entity_t PredLookup = EcsPredLookup;
 
 /* Builtin marker entities for query scopes */
-static const flecs::entity_t ScopeOpen = EcsScopeOpen;
-static const flecs::entity_t ScopeClose = EcsScopeClose;
+FLECS_API_GLOBAL const flecs::entity_t ScopeOpen = EcsScopeOpen;
+FLECS_API_GLOBAL const flecs::entity_t ScopeClose = EcsScopeClose;
 
 /** @} */
 
@@ -16763,7 +16778,7 @@ static const flecs::entity_t ScopeClose = EcsScopeClose;
 /**
  * @file addons/cpp/utils/utils.hpp
  * @brief Flecs STL (FTL?)
- * 
+ *
  * Flecs STL (FTL?)
  * Minimalistic utilities that allow for STL like functionality without having
  * to depend on the actual STL.
@@ -16798,7 +16813,7 @@ static const flecs::entity_t ScopeClose = EcsScopeClose;
 #define FLECS_FWD(...) \
   static_cast<decltype(__VA_ARGS__)&&>(__VA_ARGS__)
 
-namespace flecs 
+namespace flecs
 {
 
 namespace _
@@ -16808,10 +16823,10 @@ namespace _
 struct placement_new_tag_t{};
 constexpr placement_new_tag_t placement_new_tag{};
 template<class Ty> inline void destruct_obj(Ty* _ptr) { _ptr->~Ty(); }
-template<class Ty> inline void free_obj(Ty* _ptr) { 
+template<class Ty> inline void free_obj(Ty* _ptr) {
     if (_ptr) {
-        destruct_obj(_ptr); 
-        ecs_os_free(_ptr); 
+        destruct_obj(_ptr);
+        ecs_os_free(_ptr);
     }
 }
 
@@ -16908,7 +16923,9 @@ struct always_false {
 
 } // namespace flecs
 
+#ifndef FLECS_CUSTOM_STD_INCLUDE
 #include <stdlib.h>
+#endif
 /**
  * @file addons/cpp/utils/array.hpp
  * @brief Array class.
@@ -17177,13 +17194,15 @@ struct string_view : string {
 /**
  * @file addons/cpp/utils/enum.hpp
  * @brief Compile time enum reflection utilities.
- * 
+ *
  * Discover at compile time valid enumeration constants for an enumeration type
  * and their names. This is used to automatically register enum constants.
  */
 
+#ifndef FLECS_CUSTOM_STD_INCLUDE
 #include <string.h>
 #include <limits>
+#endif
 
 #define FLECS_ENUM_MAX(T) _::to_constant<T, 128>::value
 #define FLECS_ENUM_MAX_COUNT (FLECS_ENUM_MAX(int) + 1)
@@ -17247,7 +17266,7 @@ namespace _ {
             #define ECS_SIZE_T_STR "unsigned __int64"
         #else
             #define ECS_SIZE_T_STR "unsigned int"
-        #endif 
+        #endif
     #elif defined(__clang__)
         #define ECS_SIZE_T_STR "size_t"
     #else
@@ -17263,7 +17282,7 @@ namespace _ {
             #define ECS_SIZE_T_STR "unsigned __int32"
         #else
             #define ECS_SIZE_T_STR "unsigned int"
-        #endif 
+        #endif
     #elif defined(__clang__)
         #define ECS_SIZE_T_STR "size_t"
     #else
@@ -17277,12 +17296,12 @@ namespace _ {
 
 template <typename E>
 constexpr size_t enum_type_len() {
-    return ECS_FUNC_TYPE_LEN(, enum_type_len, ECS_FUNC_NAME) 
+    return ECS_FUNC_TYPE_LEN(, enum_type_len, ECS_FUNC_NAME)
         - (sizeof(ECS_SIZE_T_STR) - 1u);
 }
 
 /** Test if value is valid for enumeration.
- * This function leverages that when a valid value is provided, 
+ * This function leverages that when a valid value is provided,
  * __PRETTY_FUNCTION__ contains the enumeration name, whereas if a value is
  * invalid, the string contains a number or a negative (-) symbol. */
 #if defined(ECS_TARGET_CLANG)
@@ -17345,11 +17364,11 @@ struct enum_constant_data {
 
 /**
  * @brief Provides utilities for enum reflection.
- * 
+ *
  * This struct provides static functions for enum reflection, including conversion
  * between enum values and their underlying integral types, and iteration over enum
  * values.
- * 
+ *
  * @tparam E The enum type.
  * @tparam Handler The handler for enum reflection operations.
  */
@@ -17376,7 +17395,7 @@ struct enum_reflection {
      * Recursively divide and conquers the search space to reduce the template-depth. Once
      * recursive division is complete, calls Handle<E>::handle_constant in ascending order,
      * passing the values computed up the chain.
-     * 
+     *
      * @tparam Low The lower bound of the search range, inclusive.
      * @tparam High The upper bound of the search range, inclusive.
      * @tparam Args Additional arguments to be passed through to Handler<E>::handle_constant
@@ -17399,10 +17418,10 @@ struct enum_reflection {
     /**
      * @brief Iterates over the mask range (Low, High] of enum values between Low and High.
      *
-     * Recursively iterates the search space, looking for enums defined as multiple-of-2 
+     * Recursively iterates the search space, looking for enums defined as multiple-of-2
      * bitmasks. Each iteration, shifts bit to the right until it hits Low, then calls
      * Handler<E>::handle_constant for each bitmask in ascending order.
-     * 
+     *
      * @tparam Low The lower bound of the search range, not inclusive
      * @tparam High The upper bound of the search range, inclusive.
      * @tparam Args Additional arguments to be passed through to Handler<E>::handle_constant
@@ -17424,10 +17443,10 @@ struct enum_reflection {
     /**
      * @brief Handles enum iteration for gathering reflection data.
      *
-     * Iterates over all enum values up to a specified maximum value 
+     * Iterates over all enum values up to a specified maximum value
      * (each_enum_range<0, Value>), then iterates the rest of the possible bitmasks
      * (each_mask_range<Value, high_bit>).
-     * 
+     *
      * @tparam Value The maximum enum value to iterate up to.
      * @tparam Args Additional arguments to be passed through to Handler<E>::handle_constant
      * @param args Additional arguments to be passed through to Handler<E>::handle_constant
@@ -17482,7 +17501,7 @@ struct enum_type {
      *
      * Because reflection occurs in-order, we can use current value/last value to determine continuity, and
      * use that as a lookup heuristic later on.
-     * 
+     *
      * @tparam Enum The enum type.
      */
     template <typename Enum>
@@ -17498,7 +17517,7 @@ struct enum_type {
             // Constant is valid, so fill reflection data.
             auto v = enum_reflection<E, reflection_init>::template to_int<Value>();
             const char *name = enum_constant_to_name<Enum, Value>();
-            
+
             ++enum_type<Enum>::data.max; // Increment cursor as we build constants array.
 
             // If the enum was previously contiguous, and continues to be through the current value...
@@ -17576,10 +17595,10 @@ struct enum_data {
     enum_data(flecs::world_t *world, _::enum_data_impl<E>& impl)
         : world_(world)
         , impl_(impl) { }
-    
+
 	/**
      * @brief Checks if a given integral value is a valid enum value.
-     * 
+     *
      * @param value The integral value.
      * @return true If the value is a valid enum value.
      * @return false If the value is not a valid enum value.
@@ -17594,7 +17613,7 @@ struct enum_data {
 
     /**
      * @brief Checks if a given enum value is valid.
-     * 
+     *
      * @param value The enum value.
      * @return true If the value is valid.
      * @return false If the value is not valid.
@@ -17605,7 +17624,7 @@ struct enum_data {
 
     /**
      * @brief Finds the index into the constants array for a value, if one exists
-     * 
+     *
      * @param value The enum value.
      * @return int The index of the enum value.
      */
@@ -17629,7 +17648,7 @@ struct enum_data {
 
     /**
      * @brief Finds the index into the constants array for an enum value, if one exists
-     * 
+     *
      * @param value The enum value.
      * @return int The index of the enum value.
      */
@@ -17876,8 +17895,8 @@ using second_arg_t = typename second_arg<Func>::type;
 
 namespace flecs {
 
-struct id;
-struct entity;
+FLECS_API_STRUCT struct id;
+FLECS_API_STRUCT struct entity;
 
 /**
  * @defgroup cpp_ids Ids
@@ -17893,6 +17912,7 @@ struct entity;
  * - pair ids
  * - entities with id flags set (like flecs::AUTO_OVERRIDE, flecs::TOGGLE)
  */
+FLECS_API_STRUCT
 struct id {
     id()
         : world_(nullptr)
@@ -18031,8 +18051,8 @@ namespace flecs {
  * @{
  */
 
-struct term;
-struct term_builder;
+FLECS_API_STRUCT struct term;
+FLECS_API_STRUCT struct term_builder;
 
 /** @} */
 
@@ -18056,9 +18076,11 @@ namespace flecs {
 
 struct query_base;
 
+FLECS_API_STRUCT
 template<typename ... Components>
 struct query;
 
+FLECS_API_STRUCT
 template<typename ... Components>
 struct query_builder;
 
@@ -18280,8 +18302,9 @@ namespace flecs {
  * @{
  */
 
-struct observer;
+FLECS_API_STRUCT struct observer;
 
+FLECS_API_STRUCT
 template<typename ... Components>
 struct observer_builder;
 
@@ -18307,10 +18330,12 @@ namespace flecs {
  * @{
  */
 
+FLECS_API_STRUCT
 using TickSource = EcsTickSource;
 
-struct system;
+FLECS_API_STRUCT struct system;
 
+FLECS_API_STRUCT
 template<typename ... Components>
 struct system_builder;
 
@@ -18349,17 +18374,17 @@ template <typename ... Components>
 struct pipeline_builder;
 
 /* Builtin pipeline tags */
-static const flecs::entity_t OnStart = EcsOnStart;
-static const flecs::entity_t PreFrame = EcsPreFrame;
-static const flecs::entity_t OnLoad = EcsOnLoad;
-static const flecs::entity_t PostLoad = EcsPostLoad;
-static const flecs::entity_t PreUpdate = EcsPreUpdate;
-static const flecs::entity_t OnUpdate = EcsOnUpdate;
-static const flecs::entity_t OnValidate = EcsOnValidate;
-static const flecs::entity_t PostUpdate = EcsPostUpdate;
-static const flecs::entity_t PreStore = EcsPreStore;
-static const flecs::entity_t OnStore = EcsOnStore;
-static const flecs::entity_t PostFrame = EcsPostFrame;
+FLECS_API_GLOBAL const flecs::entity_t OnStart = EcsOnStart;
+FLECS_API_GLOBAL const flecs::entity_t PreFrame = EcsPreFrame;
+FLECS_API_GLOBAL const flecs::entity_t OnLoad = EcsOnLoad;
+FLECS_API_GLOBAL const flecs::entity_t PostLoad = EcsPostLoad;
+FLECS_API_GLOBAL const flecs::entity_t PreUpdate = EcsPreUpdate;
+FLECS_API_GLOBAL const flecs::entity_t OnUpdate = EcsOnUpdate;
+FLECS_API_GLOBAL const flecs::entity_t OnValidate = EcsOnValidate;
+FLECS_API_GLOBAL const flecs::entity_t PostUpdate = EcsPostUpdate;
+FLECS_API_GLOBAL const flecs::entity_t PreStore = EcsPreStore;
+FLECS_API_GLOBAL const flecs::entity_t OnStore = EcsOnStore;
+FLECS_API_GLOBAL const flecs::entity_t PostFrame = EcsPostFrame;
 
 /** @} */
 
@@ -18384,10 +18409,10 @@ namespace flecs {
  * @{
  */
 
-using Timer = EcsTimer;
-using RateFilter = EcsRateFilter;
+FLECS_API_STRUCT using Timer = EcsTimer;
+FLECS_API_STRUCT using RateFilter = EcsRateFilter;
 
-struct timer;
+FLECS_API_STRUCT struct timer;
 
 /** @} */
 
@@ -18419,19 +18444,19 @@ namespace doc {
  */
 
 /** flecs.doc.Description component */
-using Description = EcsDocDescription;
+FLECS_API_STRUCT using Description = EcsDocDescription;
 
 /** flecs.doc.Brief component */
-static const flecs::entity_t Brief = EcsDocBrief;
+FLECS_API_GLOBAL const flecs::entity_t Brief = EcsDocBrief;
 
 /** flecs.doc.Detail component */
-static const flecs::entity_t Detail = EcsDocDetail;
+FLECS_API_GLOBAL const flecs::entity_t Detail = EcsDocDetail;
 
 /** flecs.doc.Link component */
-static const flecs::entity_t Link = EcsDocLink;
+FLECS_API_GLOBAL const flecs::entity_t Link = EcsDocLink;
 
 /** flecs.doc.Color component */
-static const flecs::entity_t Color = EcsDocColor;
+FLECS_API_GLOBAL const flecs::entity_t Color = EcsDocColor;
 
 /** @private */
 namespace _ {
@@ -18463,6 +18488,7 @@ namespace flecs {
  * @{
  */
 
+FLECS_API_STRUCT
 using Rest = EcsRest;
 
 namespace rest {
@@ -18498,98 +18524,98 @@ namespace flecs {
  */
 
 /* Primitive type aliases */
-using bool_t = ecs_bool_t;
-using char_t = ecs_char_t;
-using u8_t = ecs_u8_t;
-using u16_t = ecs_u16_t;
-using u32_t = ecs_u32_t;
-using u64_t = ecs_u64_t;
-using uptr_t = ecs_uptr_t;
-using i8_t = ecs_i8_t;
-using i16_t = ecs_i16_t;
-using i32_t = ecs_i32_t;
-using i64_t = ecs_i64_t;
-using iptr_t = ecs_iptr_t;
-using f32_t = ecs_f32_t;
-using f64_t = ecs_f64_t;
+FLECS_API_STRUCT using bool_t = ecs_bool_t;
+FLECS_API_STRUCT using char_t = ecs_char_t;
+FLECS_API_STRUCT using u8_t = ecs_u8_t;
+FLECS_API_STRUCT using u16_t = ecs_u16_t;
+FLECS_API_STRUCT using u32_t = ecs_u32_t;
+FLECS_API_STRUCT using u64_t = ecs_u64_t;
+FLECS_API_STRUCT using uptr_t = ecs_uptr_t;
+FLECS_API_STRUCT using i8_t = ecs_i8_t;
+FLECS_API_STRUCT using i16_t = ecs_i16_t;
+FLECS_API_STRUCT using i32_t = ecs_i32_t;
+FLECS_API_STRUCT using i64_t = ecs_i64_t;
+FLECS_API_STRUCT using iptr_t = ecs_iptr_t;
+FLECS_API_STRUCT using f32_t = ecs_f32_t;
+FLECS_API_STRUCT using f64_t = ecs_f64_t;
 
 /* Embedded type aliases */
-using member_t = ecs_member_t;
-using enum_constant_t = ecs_enum_constant_t;
-using bitmask_constant_t = ecs_bitmask_constant_t;
+FLECS_API_STRUCT using member_t = ecs_member_t;
+FLECS_API_STRUCT using enum_constant_t = ecs_enum_constant_t;
+FLECS_API_STRUCT using bitmask_constant_t = ecs_bitmask_constant_t;
 
 /* Components */
-using Type = EcsType;
-using TypeSerializer = EcsTypeSerializer;
-using Primitive = EcsPrimitive;
-using Enum = EcsEnum;
-using Bitmask = EcsBitmask;
-using Member = EcsMember;
-using MemberRanges = EcsMemberRanges;
-using Struct = EcsStruct;
-using Array = EcsArray;
-using Vector = EcsVector;
-using Unit = EcsUnit;
+FLECS_API_STRUCT using Type = EcsType;
+FLECS_API_STRUCT using TypeSerializer = EcsTypeSerializer;
+FLECS_API_STRUCT using Primitive = EcsPrimitive;
+FLECS_API_STRUCT using Enum = EcsEnum;
+FLECS_API_STRUCT using Bitmask = EcsBitmask;
+FLECS_API_STRUCT using Member = EcsMember;
+FLECS_API_STRUCT using MemberRanges = EcsMemberRanges;
+FLECS_API_STRUCT using Struct = EcsStruct;
+FLECS_API_STRUCT using Array = EcsArray;
+FLECS_API_STRUCT using Vector = EcsVector;
+FLECS_API_STRUCT using Unit = EcsUnit;
 
 /** Base type for bitmasks */
-struct bitmask {
+FLECS_API_STRUCT struct bitmask {
     uint32_t value;
 };
 
 /* Handles to builtin reflection types */
-static const flecs::entity_t Bool = ecs_id(ecs_bool_t);
-static const flecs::entity_t Char = ecs_id(ecs_char_t);
-static const flecs::entity_t Byte = ecs_id(ecs_byte_t);
-static const flecs::entity_t U8 = ecs_id(ecs_u8_t);
-static const flecs::entity_t U16 = ecs_id(ecs_u16_t);
-static const flecs::entity_t U32 = ecs_id(ecs_u32_t);
-static const flecs::entity_t U64 = ecs_id(ecs_u64_t);
-static const flecs::entity_t Uptr = ecs_id(ecs_uptr_t);
-static const flecs::entity_t I8 = ecs_id(ecs_i8_t);
-static const flecs::entity_t I16 = ecs_id(ecs_i16_t);
-static const flecs::entity_t I32 = ecs_id(ecs_i32_t);
-static const flecs::entity_t I64 = ecs_id(ecs_i64_t);
-static const flecs::entity_t Iptr = ecs_id(ecs_iptr_t);
-static const flecs::entity_t F32 = ecs_id(ecs_f32_t);
-static const flecs::entity_t F64 = ecs_id(ecs_f64_t);
-static const flecs::entity_t String = ecs_id(ecs_string_t);
-static const flecs::entity_t Entity = ecs_id(ecs_entity_t);
-static const flecs::entity_t Constant = EcsConstant;
-static const flecs::entity_t Quantity = EcsQuantity;
+FLECS_API_GLOBAL const flecs::entity_t Bool = ecs_id(ecs_bool_t);
+FLECS_API_GLOBAL const flecs::entity_t Char = ecs_id(ecs_char_t);
+FLECS_API_GLOBAL const flecs::entity_t Byte = ecs_id(ecs_byte_t);
+FLECS_API_GLOBAL const flecs::entity_t U8 = ecs_id(ecs_u8_t);
+FLECS_API_GLOBAL const flecs::entity_t U16 = ecs_id(ecs_u16_t);
+FLECS_API_GLOBAL const flecs::entity_t U32 = ecs_id(ecs_u32_t);
+FLECS_API_GLOBAL const flecs::entity_t U64 = ecs_id(ecs_u64_t);
+FLECS_API_GLOBAL const flecs::entity_t Uptr = ecs_id(ecs_uptr_t);
+FLECS_API_GLOBAL const flecs::entity_t I8 = ecs_id(ecs_i8_t);
+FLECS_API_GLOBAL const flecs::entity_t I16 = ecs_id(ecs_i16_t);
+FLECS_API_GLOBAL const flecs::entity_t I32 = ecs_id(ecs_i32_t);
+FLECS_API_GLOBAL const flecs::entity_t I64 = ecs_id(ecs_i64_t);
+FLECS_API_GLOBAL const flecs::entity_t Iptr = ecs_id(ecs_iptr_t);
+FLECS_API_GLOBAL const flecs::entity_t F32 = ecs_id(ecs_f32_t);
+FLECS_API_GLOBAL const flecs::entity_t F64 = ecs_id(ecs_f64_t);
+FLECS_API_GLOBAL const flecs::entity_t String = ecs_id(ecs_string_t);
+FLECS_API_GLOBAL const flecs::entity_t Entity = ecs_id(ecs_entity_t);
+FLECS_API_GLOBAL const flecs::entity_t Constant = EcsConstant;
+FLECS_API_GLOBAL const flecs::entity_t Quantity = EcsQuantity;
 
 namespace meta {
 
 /* Type kinds supported by reflection system */
-using type_kind_t = ecs_type_kind_t;
-static const type_kind_t PrimitiveType = EcsPrimitiveType;
-static const type_kind_t BitmaskType = EcsBitmaskType;
-static const type_kind_t EnumType = EcsEnumType;
-static const type_kind_t StructType = EcsStructType;
-static const type_kind_t ArrayType = EcsArrayType;
-static const type_kind_t VectorType = EcsVectorType;
-static const type_kind_t CustomType = EcsOpaqueType;
-static const type_kind_t TypeKindLast = EcsTypeKindLast;
+FLECS_API_STRUCT using type_kind_t = ecs_type_kind_t;
+FLECS_API_GLOBAL const type_kind_t PrimitiveType = EcsPrimitiveType;
+FLECS_API_GLOBAL const type_kind_t BitmaskType = EcsBitmaskType;
+FLECS_API_GLOBAL const type_kind_t EnumType = EcsEnumType;
+FLECS_API_GLOBAL const type_kind_t StructType = EcsStructType;
+FLECS_API_GLOBAL const type_kind_t ArrayType = EcsArrayType;
+FLECS_API_GLOBAL const type_kind_t VectorType = EcsVectorType;
+FLECS_API_GLOBAL const type_kind_t CustomType = EcsOpaqueType;
+FLECS_API_GLOBAL const type_kind_t TypeKindLast = EcsTypeKindLast;
 
 /* Primitive type kinds supported by reflection system */
-using primitive_kind_t = ecs_primitive_kind_t;
-static const primitive_kind_t Bool = EcsBool;
-static const primitive_kind_t Char = EcsChar;
-static const primitive_kind_t Byte = EcsByte;
-static const primitive_kind_t U8 = EcsU8;
-static const primitive_kind_t U16 = EcsU16;
-static const primitive_kind_t U32 = EcsU32;
-static const primitive_kind_t U64 = EcsU64;
-static const primitive_kind_t I8 = EcsI8;
-static const primitive_kind_t I16 = EcsI16;
-static const primitive_kind_t I32 = EcsI32;
-static const primitive_kind_t I64 = EcsI64;
-static const primitive_kind_t F32 = EcsF32;
-static const primitive_kind_t F64 = EcsF64;
-static const primitive_kind_t UPtr = EcsUPtr;
-static const primitive_kind_t IPtr = EcsIPtr;
-static const primitive_kind_t String = EcsString;
-static const primitive_kind_t Entity = EcsEntity;
-static const primitive_kind_t PrimitiveKindLast = EcsPrimitiveKindLast;
+FLECS_API_STRUCT using primitive_kind_t = ecs_primitive_kind_t;
+FLECS_API_GLOBAL const primitive_kind_t Bool = EcsBool;
+FLECS_API_GLOBAL const primitive_kind_t Char = EcsChar;
+FLECS_API_GLOBAL const primitive_kind_t Byte = EcsByte;
+FLECS_API_GLOBAL const primitive_kind_t U8 = EcsU8;
+FLECS_API_GLOBAL const primitive_kind_t U16 = EcsU16;
+FLECS_API_GLOBAL const primitive_kind_t U32 = EcsU32;
+FLECS_API_GLOBAL const primitive_kind_t U64 = EcsU64;
+FLECS_API_GLOBAL const primitive_kind_t I8 = EcsI8;
+FLECS_API_GLOBAL const primitive_kind_t I16 = EcsI16;
+FLECS_API_GLOBAL const primitive_kind_t I32 = EcsI32;
+FLECS_API_GLOBAL const primitive_kind_t I64 = EcsI64;
+FLECS_API_GLOBAL const primitive_kind_t F32 = EcsF32;
+FLECS_API_GLOBAL const primitive_kind_t F64 = EcsF64;
+FLECS_API_GLOBAL const primitive_kind_t UPtr = EcsUPtr;
+FLECS_API_GLOBAL const primitive_kind_t IPtr = EcsIPtr;
+FLECS_API_GLOBAL const primitive_kind_t String = EcsString;
+FLECS_API_GLOBAL const primitive_kind_t Entity = EcsEntity;
+FLECS_API_GLOBAL const primitive_kind_t PrimitiveKindLast = EcsPrimitiveKindLast;
 
 /** @} */
 
@@ -18784,16 +18810,18 @@ namespace flecs {
  */
 
 /** Serializer object, used for serializing opaque types */
-using serializer = ecs_serializer_t;
+FLECS_API_STRUCT using serializer = ecs_serializer_t;
 
 /** Serializer function, used to serialize opaque types */
-using serialize_t = ecs_meta_serialize_t;
+FLECS_API_STRUCT using serialize_t = ecs_meta_serialize_t;
 
 /** Type safe variant of serializer function */
+FLECS_API_STRUCT
 template <typename T>
 using serialize = int(*)(const serializer *, const T*);
 
 /** Type safe interface for opaque types */
+FLECS_API_STRUCT
 template <typename T, typename ElemType = void>
 struct opaque {
     opaque(flecs::world_t *w = nullptr) : world(w) {
@@ -18958,6 +18986,8 @@ struct opaque {
 #pragma once
 
 namespace flecs {
+
+FLECS_API_STRUCT
 struct units {
 
 /**
@@ -19333,14 +19363,18 @@ namespace flecs {
  */
 
 /** Component that stores world statistics */
+FLECS_API_STRUCT
 using WorldStats = EcsWorldStats;
 
 /** Component that stores system/pipeline statistics */
+FLECS_API_STRUCT
 using PipelineStats = EcsPipelineStats;
 
 /** Component with world summary stats */
+FLECS_API_STRUCT
 using WorldSummary = EcsWorldSummary;
 
+FLECS_API_STRUCT
 struct stats {
     stats(flecs::world& world);
 };
@@ -19475,6 +19509,7 @@ namespace flecs {
  * @{
  */
 
+FLECS_API_STRUCT
 struct metrics {
     using Value = EcsMetricValue;
     using Source = EcsMetricSource;
@@ -19513,6 +19548,7 @@ namespace flecs {
  */
 
 /** Module */
+FLECS_API_STRUCT
 struct alerts {
     using AlertsActive = EcsAlertsActive;
     using Instance = EcsAlertInstance;
@@ -19525,9 +19561,11 @@ struct alerts {
     alerts(flecs::world& world);
 };
 
+FLECS_API_STRUCT
 template <typename ... Components>
 struct alert;
 
+FLECS_API_STRUCT
 template <typename ... Components>
 struct alert_builder;
 
@@ -19554,9 +19592,9 @@ namespace flecs {
  * @{
  */
 
-using from_json_desc_t = ecs_from_json_desc_t;
-using entity_to_json_desc_t = ecs_entity_to_json_desc_t;
-using iter_to_json_desc_t = ecs_iter_to_json_desc_t;
+FLECS_API_STRUCT using from_json_desc_t = ecs_from_json_desc_t;
+FLECS_API_STRUCT using entity_to_json_desc_t = ecs_entity_to_json_desc_t;
+FLECS_API_STRUCT using iter_to_json_desc_t = ecs_iter_to_json_desc_t;
 
 /** @} */
 
@@ -19589,6 +19627,7 @@ namespace flecs {
  */
 
 /** App builder interface */
+FLECS_API_STRUCT
 struct app_builder {
     app_builder(flecs::world_t *world)
         : world_(world)
@@ -19690,6 +19729,7 @@ namespace flecs {
  */
 
 /** Script builder interface */
+FLECS_API_STRUCT
 struct script_builder {
     script_builder(flecs::world_t *world, const char *name = nullptr)
         : world_(world)
@@ -19733,7 +19773,7 @@ namespace flecs {
  * @{
  */
 
-struct script_builder;
+FLECS_API_STRUCT struct script_builder;
 
 /** @} */
 
@@ -25625,12 +25665,14 @@ const char* from_json(const char *json) {
 
 #pragma once
 
+#ifndef FLECS_CUSTOM_STD_INCLUDE
 #include <utility> // std::declval
+#endif
 
 namespace flecs
 {
 
-namespace _ 
+namespace _
 {
 
 // Binding ctx for component hooks
@@ -25686,7 +25728,7 @@ struct field_ptrs {
 private:
     void populate(const ecs_iter_t*, size_t) { }
 
-    template <typename T, typename... Targs, 
+    template <typename T, typename... Targs,
         typename A = remove_pointer_t<actual_type_t<T>>,
             if_not_t< is_empty<A>::value > = 0>
     void populate(const ecs_iter_t *iter, size_t index, T, Targs... comps) {
@@ -25696,7 +25738,7 @@ struct field_ptrs {
             fields_[index].is_ref = true;
             fields_[index].index = static_cast<int8_t>(index);
         } else {
-            fields_[index].ptr = ecs_field_w_size(iter, sizeof(A), 
+            fields_[index].ptr = ecs_field_w_size(iter, sizeof(A),
                 static_cast<int8_t>(index));
             fields_[index].is_ref = iter->sources[index] != 0;
         }
@@ -25704,7 +25746,7 @@ struct field_ptrs {
         populate(iter, index + 1, comps ...);
     }
 
-    template <typename T, typename... Targs, 
+    template <typename T, typename... Targs,
         typename A = remove_pointer_t<actual_type_t<T>>,
             if_t< is_empty<A>::value > = 0>
     void populate(const ecs_iter_t *iter, size_t index, T, Targs... comps) {
@@ -25713,11 +25755,11 @@ struct field_ptrs {
 
     void populate_self(const ecs_iter_t*, size_t) { }
 
-    template <typename T, typename... Targs, 
+    template <typename T, typename... Targs,
         typename A = remove_pointer_t<actual_type_t<T>>,
             if_not_t< is_empty<A>::value > = 0>
     void populate_self(const ecs_iter_t *iter, size_t index, T, Targs... comps) {
-        fields_[index].ptr = ecs_field_w_size(iter, sizeof(A), 
+        fields_[index].ptr = ecs_field_w_size(iter, sizeof(A),
             static_cast<int8_t>(index));
         // fields_[index].is_ref = iter->sources[index] != 0;
         fields_[index].is_ref = false;
@@ -25742,27 +25784,27 @@ struct each_field { };
 
 // Base class
 struct each_column_base {
-    each_column_base(const _::field_ptr& field, size_t row) 
+    each_column_base(const _::field_ptr& field, size_t row)
         : field_(field), row_(row) {
     }
 
 protected:
     const _::field_ptr& field_;
-    size_t row_;    
+    size_t row_;
 };
 
 // If type is not a pointer, return a reference to the type (default case)
 template <typename T>
-struct each_field<T, if_t< !is_pointer<T>::value && 
-        !is_empty<actual_type_t<T>>::value && is_actual<T>::value > > 
-    : each_column_base 
+struct each_field<T, if_t< !is_pointer<T>::value &&
+        !is_empty<actual_type_t<T>>::value && is_actual<T>::value > >
+    : each_column_base
 {
-    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row) 
+    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row)
         : each_column_base(field, row) { }
 
     T& get_row() {
         return static_cast<T*>(this->field_.ptr)[this->row_];
-    }  
+    }
 };
 
 // If argument type is not the same as actual component type, return by value.
@@ -25770,25 +25812,25 @@ struct each_field<T, if_t< !is_pointer<T>::value &&
 // A typical scenario where this happens is when using flecs::pair types.
 template <typename T>
 struct each_field<T, if_t< !is_pointer<T>::value &&
-        !is_empty<actual_type_t<T>>::value && !is_actual<T>::value> > 
-    : each_column_base 
+        !is_empty<actual_type_t<T>>::value && !is_actual<T>::value> >
+    : each_column_base
 {
-    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row) 
+    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row)
         : each_column_base(field, row) { }
 
     T get_row() {
         return static_cast<actual_type_t<T>*>(this->field_.ptr)[this->row_];
-    }  
+    }
 };
 
 // If type is empty (indicating a tag) the query will pass a nullptr. To avoid
 // returning nullptr to reference arguments, return a temporary value.
 template <typename T>
-struct each_field<T, if_t< is_empty<actual_type_t<T>>::value && 
-        !is_pointer<T>::value > > 
-    : each_column_base 
+struct each_field<T, if_t< is_empty<actual_type_t<T>>::value &&
+        !is_pointer<T>::value > >
+    : each_column_base
 {
-    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row) 
+    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row)
         : each_column_base(field, row) { }
 
     T get_row() {
@@ -25799,11 +25841,11 @@ struct each_field<T, if_t< is_empty<actual_type_t<T>>::value &&
 // If type is a pointer (indicating an optional value) don't index with row if
 // the field is not set.
 template <typename T>
-struct each_field<T, if_t< is_pointer<T>::value && 
-        !is_empty<actual_type_t<T>>::value > > 
-    : each_column_base 
+struct each_field<T, if_t< is_pointer<T>::value &&
+        !is_empty<actual_type_t<T>>::value > >
+    : each_column_base
 {
-    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row) 
+    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row)
         : each_column_base(field, row) { }
 
     actual_type_t<T> get_row() {
@@ -25835,7 +25877,7 @@ struct each_ref_field : public each_field<T> {
         }
 
         if (field.is_row) {
-            field.ptr = ecs_field_at_w_size(iter, sizeof(T), field.index, 
+            field.ptr = ecs_field_at_w_size(iter, sizeof(T), field.index,
                 static_cast<int8_t>(row));
         }
     }
@@ -25847,10 +25889,10 @@ struct each_delegate : public delegate {
     using Terms = typename field_ptrs<Components ...>::array;
 
     template < if_not_t< is_same< decay_t<Func>, decay_t<Func>& >::value > = 0>
-    explicit each_delegate(Func&& func) noexcept 
+    explicit each_delegate(Func&& func) noexcept
         : func_(FLECS_MOV(func)) { }
 
-    explicit each_delegate(const Func& func) noexcept 
+    explicit each_delegate(const Func& func) noexcept
         : func_(func) { }
 
     // Invoke object directly. This operation is useful when the calling
@@ -25913,14 +25955,14 @@ struct each_delegate : public delegate {
 
 private:
     // func(flecs::entity, Components...)
-    template <template<typename X, typename = int> class ColumnType, 
+    template <template<typename X, typename = int> class ColumnType,
         typename... Args,
         typename Fn = Func,
         decltype(std::declval<const Fn&>()(
             std::declval<flecs::entity>(),
             std::declval<ColumnType< remove_reference_t<Components> > >().get_row()...), 0) = 0>
     static void invoke_callback(
-        ecs_iter_t *iter, const Func& func, size_t i, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t i, Args... comps)
     {
         ecs_assert(iter->count > 0, ECS_INVALID_OPERATION,
             "no entities returned, use each() without flecs::entity argument");
@@ -25931,7 +25973,7 @@ struct each_delegate : public delegate {
     }
 
     // func(flecs::iter&, size_t row, Components...)
-    template <template<typename X, typename = int> class ColumnType, 
+    template <template<typename X, typename = int> class ColumnType,
         typename... Args,
         typename Fn = Func,
         decltype(std::declval<const Fn&>()(
@@ -25939,7 +25981,7 @@ struct each_delegate : public delegate {
             std::declval<size_t&>(),
             std::declval<ColumnType< remove_reference_t<Components> > >().get_row()...), 0) = 0>
     static void invoke_callback(
-        ecs_iter_t *iter, const Func& func, size_t i, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t i, Args... comps)
     {
         flecs::iter it(iter);
         func(it, i, (ColumnType< remove_reference_t<Components> >(iter, comps, i)
@@ -25947,23 +25989,23 @@ struct each_delegate : public delegate {
     }
 
     // func(Components...)
-    template <template<typename X, typename = int> class ColumnType, 
+    template <template<typename X, typename = int> class ColumnType,
         typename... Args,
         typename Fn = Func,
         decltype(std::declval<const Fn&>()(
             std::declval<ColumnType< remove_reference_t<Components> > >().get_row()...), 0) = 0>
     static void invoke_callback(
-        ecs_iter_t *iter, const Func& func, size_t i, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t i, Args... comps)
     {
         func((ColumnType< remove_reference_t<Components> >(iter, comps, i)
             .get_row())...);
     }
 
-    template <template<typename X, typename = int> class ColumnType, 
-        typename... Args, if_t< 
+    template <template<typename X, typename = int> class ColumnType,
+        typename... Args, if_t<
             sizeof...(Components) == sizeof...(Args)> = 0>
     static void invoke_unpack(
-        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
     {
         ECS_TABLE_LOCK(iter->world, iter->table);
 
@@ -25981,14 +26023,14 @@ struct each_delegate : public delegate {
         ECS_TABLE_UNLOCK(iter->world, iter->table);
     }
 
-    template <template<typename X, typename = int> class ColumnType, 
+    template <template<typename X, typename = int> class ColumnType,
         typename... Args, if_t< sizeof...(Components) != sizeof...(Args) > = 0>
-    static void invoke_unpack(ecs_iter_t *iter, const Func& func, 
-        size_t index, Terms& columns, Args... comps) 
+    static void invoke_unpack(ecs_iter_t *iter, const Func& func,
+        size_t index, Terms& columns, Args... comps)
     {
         invoke_unpack<ColumnType>(
             iter, func, index + 1, columns, comps..., columns[index]);
-    }    
+    }
 
 public:
     Func func_;
@@ -25999,10 +26041,10 @@ struct find_delegate : public delegate {
     using Terms = typename field_ptrs<Components ...>::array;
 
     template < if_not_t< is_same< decay_t<Func>, decay_t<Func>& >::value > = 0>
-    explicit find_delegate(Func&& func) noexcept 
+    explicit find_delegate(Func&& func) noexcept
         : func_(FLECS_MOV(func)) { }
 
-    explicit find_delegate(const Func& func) noexcept 
+    explicit find_delegate(const Func& func) noexcept
         : func_(func) { }
 
     // Invoke object directly. This operation is useful when the calling
@@ -26033,7 +26075,7 @@ struct find_delegate : public delegate {
             std::declval<flecs::entity>(),
             std::declval<ColumnType< remove_reference_t<Components> > >().get_row()...))) = true>
     static flecs::entity invoke_callback(
-        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
     {
         ECS_TABLE_LOCK(iter->world, iter->table);
 
@@ -26070,7 +26112,7 @@ struct find_delegate : public delegate {
             std::declval<size_t&>(),
             std::declval<ColumnType< remove_reference_t<Components> > >().get_row()...))) = true>
     static flecs::entity invoke_callback(
-        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
     {
         size_t count = static_cast<size_t>(iter->count);
         if (count == 0) {
@@ -26085,7 +26127,7 @@ struct find_delegate : public delegate {
         ECS_TABLE_LOCK(iter->world, iter->table);
 
         for (size_t i = 0; i < count; i ++) {
-            if (func(it, i, 
+            if (func(it, i,
                 (ColumnType< remove_reference_t<Components> >(iter, comps, i)
                     .get_row())...))
             {
@@ -26107,7 +26149,7 @@ struct find_delegate : public delegate {
         decltype(bool(std::declval<const Fn&>()(
             std::declval<ColumnType< remove_reference_t<Components> > >().get_row()...))) = true>
     static flecs::entity invoke_callback(
-        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
     {
         size_t count = static_cast<size_t>(iter->count);
         if (count == 0) {
@@ -26136,10 +26178,10 @@ struct find_delegate : public delegate {
         return result;
     }
 
-    template <template<typename X, typename = int> class ColumnType, 
+    template <template<typename X, typename = int> class ColumnType,
         typename... Args, if_t< sizeof...(Components) != sizeof...(Args) > = 0>
-    static flecs::entity invoke_callback(ecs_iter_t *iter, const Func& func, 
-        size_t index, Terms& columns, Args... comps) 
+    static flecs::entity invoke_callback(ecs_iter_t *iter, const Func& func,
+        size_t index, Terms& columns, Args... comps)
     {
         return invoke_callback<ColumnType>(
             iter, func, index + 1, columns, comps..., columns[index]);
@@ -26155,10 +26197,10 @@ struct find_delegate : public delegate {
 template <typename Func>
 struct run_delegate : delegate {
     template < if_not_t< is_same< decay_t<Func>, decay_t<Func>& >::value > = 0>
-    explicit run_delegate(Func&& func) noexcept 
+    explicit run_delegate(Func&& func) noexcept
         : func_(FLECS_MOV(func)) { }
 
-    explicit run_delegate(const Func& func) noexcept 
+    explicit run_delegate(const Func& func) noexcept
         : func_(func) { }
 
     // Invoke object directly. This operation is useful when the calling
@@ -26187,7 +26229,7 @@ struct run_delegate : delegate {
 
 template <typename Func>
 struct entity_observer_delegate : delegate {
-    explicit entity_observer_delegate(Func&& func) noexcept 
+    explicit entity_observer_delegate(Func&& func) noexcept
         : func_(FLECS_MOV(func)) { }
 
     // Static function that can be used as callback for systems/triggers
@@ -26217,7 +26259,7 @@ struct entity_observer_delegate : delegate {
 
 template <typename Func, typename Event>
 struct entity_payload_observer_delegate : delegate {
-    explicit entity_payload_observer_delegate(Func&& func) noexcept 
+    explicit entity_payload_observer_delegate(Func&& func) noexcept
         : func_(FLECS_MOV(func)) { }
 
     // Static function that can be used as callback for systems/triggers
@@ -26233,7 +26275,7 @@ struct entity_payload_observer_delegate : delegate {
         auto self = static_cast<const entity_payload_observer_delegate*>(
             iter->callback_ctx);
         ecs_assert(self != nullptr, ECS_INTERNAL_ERROR, NULL);
-        ecs_assert(iter->param != nullptr, ECS_INVALID_OPERATION, 
+        ecs_assert(iter->param != nullptr, ECS_INVALID_OPERATION,
             "entity observer invoked without payload");
 
         Event *data = static_cast<Event*>(iter->param);
@@ -26248,7 +26290,7 @@ struct entity_payload_observer_delegate : delegate {
         auto self = static_cast<const entity_payload_observer_delegate*>(
             iter->callback_ctx);
         ecs_assert(self != nullptr, ECS_INTERNAL_ERROR, NULL);
-        ecs_assert(iter->param != nullptr, ECS_INVALID_OPERATION, 
+        ecs_assert(iter->param != nullptr, ECS_INVALID_OPERATION,
             "entity observer invoked without payload");
 
         Event *data = static_cast<Event*>(iter->param);
@@ -26286,13 +26328,13 @@ struct entity_with_delegate_impl<arg_list<Args ...>> {
         return true;
     }
 
-    static 
+    static
     bool get_ptrs(world_t *world, flecs::entity_t e, const ecs_record_t *r, ecs_table_t *table,
-        ArrayType& ptrs) 
+        ArrayType& ptrs)
     {
         ecs_assert(table != NULL, ECS_INTERNAL_ERROR, NULL);
-        if (!ecs_table_column_count(table) && 
-            !ecs_table_has_flags(table, EcsTableHasSparse)) 
+        if (!ecs_table_column_count(table) &&
+            !ecs_table_has_flags(table, EcsTableHasSparse))
         {
             return false;
         }
@@ -26306,7 +26348,7 @@ struct entity_with_delegate_impl<arg_list<Args ...>> {
 
         /* Get column indices for components */
         ColumnArray columns ({
-            ecs_table_get_column_index(real_world, table, 
+            ecs_table_get_column_index(real_world, table,
                 _::type<Args>().id(world))...
         });
 
@@ -26334,12 +26376,12 @@ struct entity_with_delegate_impl<arg_list<Args ...>> {
         /* Get pointers w/ensure */
         size_t i = 0;
         DummyArray dummy ({
-            (ptrs[i ++] = ecs_ensure_id(world, e, 
+            (ptrs[i ++] = ecs_ensure_id(world, e,
                 _::type<Args>().id(world)), 0)...
         });
 
         return true;
-    }    
+    }
 
     template <typename Func>
     static bool invoke_read(world_t *world, entity_t e, const Func& func) {
@@ -26397,8 +26439,8 @@ struct entity_with_delegate_impl<arg_list<Args ...>> {
     }
 
     // Utility for storing id in array in pack expansion
-    static size_t store_added(IdArray& added, size_t elem, ecs_table_t *prev, 
-        ecs_table_t *next, id_t id) 
+    static size_t store_added(IdArray& added, size_t elem, ecs_table_t *prev,
+        ecs_table_t *next, id_t id)
     {
         // Array should only contain ids for components that are actually added,
         // so check if the prev and next tables are different.
@@ -26479,21 +26521,21 @@ struct entity_with_delegate_impl<arg_list<Args ...>> {
         (void)dummy_after;
 
         return true;
-    }    
+    }
 
 private:
-    template <typename Func, typename ... TArgs, 
+    template <typename Func, typename ... TArgs,
         if_t<sizeof...(TArgs) == sizeof...(Args)> = 0>
     static void invoke_callback(
-        const Func& f, size_t, ArrayType&, TArgs&& ... comps) 
+        const Func& f, size_t, ArrayType&, TArgs&& ... comps)
     {
         f(*static_cast<typename base_arg_type<Args>::type*>(comps)...);
     }
 
-    template <typename Func, typename ... TArgs, 
+    template <typename Func, typename ... TArgs,
         if_t<sizeof...(TArgs) != sizeof...(Args)> = 0>
-    static void invoke_callback(const Func& f, size_t arg, ArrayType& ptrs, 
-        TArgs&& ... comps) 
+    static void invoke_callback(const Func& f, size_t arg, ArrayType& ptrs,
+        TArgs&& ... comps)
     {
         invoke_callback(f, arg + 1, ptrs, comps..., ptrs[arg]);
     }
@@ -26527,8 +26569,10 @@ using delegate = _::each_delegate<typename std::decay<Func>::type, Args...>;
 
 #pragma once
 
+#ifndef FLECS_CUSTOM_STD_INCLUDE
 #include <ctype.h>
 #include <stdio.h>
+#endif
 
 /**
  * @defgroup cpp_components Components
@@ -26782,7 +26826,7 @@ struct type_impl {
         (void)name;
         (void)allow_tag;
 
-        ecs_assert(registered(world), ECS_INVALID_OPERATION, 
+        ecs_assert(registered(world), ECS_INVALID_OPERATION,
             "component '%s' was not registered before use",
             type_name<T>());
 #endif
@@ -29865,19 +29909,19 @@ struct query_builder final : _::query_builder_base<Components...> {
 }
 
 
-namespace flecs 
+namespace flecs
 {
 
 struct query_base {
     query_base() { }
 
     query_base(query_t *q)
-        : query_(q) { 
+        : query_(q) {
             flecs_poly_claim(q);
         }
 
     query_base(const query_t *q)
-        : query_(ECS_CONST_CAST(query_t*, q)) { 
+        : query_(ECS_CONST_CAST(query_t*, q)) {
             flecs_poly_claim(q);
         }
 
@@ -29903,7 +29947,7 @@ struct query_base {
     query_base& operator=(const query_base& obj) {
         this->query_ = obj.query_;
         flecs_poly_claim(this->query_);
-        return *this; 
+        return *this;
     }
 
     query_base(query_base&& obj) noexcept {
@@ -29914,7 +29958,7 @@ struct query_base {
     query_base& operator=(query_base&& obj) noexcept {
         this->query_ = obj.query_;
         obj.query_ = nullptr;
-        return *this; 
+        return *this;
     }
 
     flecs::entity entity() {
@@ -29936,7 +29980,7 @@ struct query_base {
     /** Free persistent query.
      * A persistent query is a query that is associated with an entity, such as
      * system queries and named queries. Persistent queries must be deleted with
-     * destruct(), or will be deleted automatically at world cleanup. 
+     * destruct(), or will be deleted automatically at world cleanup.
      */
     void destruct() {
         ecs_assert(query_->entity != 0, ECS_INVALID_OPERATION, "destruct() "
@@ -29964,15 +30008,15 @@ struct query_base {
      * - new entities have been matched with
      * - matched entities were deleted
      * - matched components were changed
-     * 
+     *
      * @return true if entities changed, otherwise false.
      */
     bool changed() const {
         return ecs_query_changed(query_);
     }
 
-    /** Get info for group. 
-     * 
+    /** Get info for group.
+     *
      * @param group_id The group id for which to retrieve the info.
      * @return The group info.
      */
@@ -29980,8 +30024,8 @@ struct query_base {
         return ecs_query_get_group_info(query_, group_id);
     }
 
-    /** Get context for group. 
-     * 
+    /** Get context for group.
+     *
      * @param group_id The group id for which to retrieve the context.
      * @return The group context.
      */
@@ -30065,7 +30109,7 @@ struct query : query_base, iterable<Components...> {
 
 private:
     ecs_iter_t get_iter(flecs::world_t *world) const override {
-        ecs_assert(query_ != nullptr, ECS_INVALID_PARAMETER, 
+        ecs_assert(query_ != nullptr, ECS_INVALID_PARAMETER,
             "cannot iterate invalid query");
         if (!world) {
             world = query_->world;
@@ -31541,18 +31585,18 @@ inline void init(flecs::world& world) {
 
     if (!flecs::is_same<i32_t, iptr_t>() && !flecs::is_same<i64_t, iptr_t>()) {
         flecs::_::type<iptr_t>::init(flecs::Iptr, true);
-        ecs_assert(flecs::type_id<iptr_t>() == flecs::Iptr, 
+        ecs_assert(flecs::type_id<iptr_t>() == flecs::Iptr,
             ECS_INTERNAL_ERROR, NULL);
-        // Remove symbol to prevent validation errors, as it doesn't match with 
+        // Remove symbol to prevent validation errors, as it doesn't match with
         // the typename
         ecs_remove_pair(world, flecs::Iptr, ecs_id(EcsIdentifier), EcsSymbol);
     }
 
     if (!flecs::is_same<u32_t, uptr_t>() && !flecs::is_same<u64_t, uptr_t>()) {
         flecs::_::type<uptr_t>::init(flecs::Uptr, true);
-        ecs_assert(flecs::type_id<uptr_t>() == flecs::Uptr, 
+        ecs_assert(flecs::type_id<uptr_t>() == flecs::Uptr,
             ECS_INTERNAL_ERROR, NULL);
-        // Remove symbol to prevent validation errors, as it doesn't match with 
+        // Remove symbol to prevent validation errors, as it doesn't match with
         // the typename
         ecs_remove_pair(world, flecs::Uptr, ecs_id(EcsIdentifier), EcsSymbol);
     }
@@ -31623,6 +31667,8 @@ inline flecs::entity world::vector() {
 
 } // namespace flecs
 
+extern "C++" {
+
 inline int ecs_serializer_t::value(ecs_entity_t type, const void *v) const {
     return this->value_(this, type, v);
 }
@@ -31636,6 +31682,7 @@ inline int ecs_serializer_t::value(const T& v) const {
 inline int ecs_serializer_t::member(const char *name) const {
     return this->member_(this, name);
 }
+}
 
 #endif
 #ifdef FLECS_UNITS
@@ -32795,6 +32842,8 @@ inline flecs::scoped_world world::scope(const char* name) const {
 
 #endif // __cplusplus
 
+#endif // !FLECS_CPP20_MODULE_HEADER
+
 #endif // FLECS_CPP
 
 #endif
diff --git a/include/flecs/addons/cpp/c_types.hpp b/include/flecs/addons/cpp/c_types.hpp
index 1016c1fb8f..abc79d275a 100644
--- a/include/flecs/addons/cpp/c_types.hpp
+++ b/include/flecs/addons/cpp/c_types.hpp
@@ -73,96 +73,96 @@ using Poly = EcsPoly;
 using DefaultChildComponent = EcsDefaultChildComponent;
 
 /* Builtin tags */
-static const flecs::entity_t Query = EcsQuery;
-static const flecs::entity_t Observer = EcsObserver;
-static const flecs::entity_t Private = EcsPrivate;
-static const flecs::entity_t Module = EcsModule;
-static const flecs::entity_t Prefab = EcsPrefab;
-static const flecs::entity_t Disabled = EcsDisabled;
-static const flecs::entity_t Empty = EcsEmpty;
-static const flecs::entity_t Monitor = EcsMonitor;
-static const flecs::entity_t System = EcsSystem;
-static const flecs::entity_t Pipeline = ecs_id(EcsPipeline);
-static const flecs::entity_t Phase = EcsPhase;
+FLECS_API_GLOBAL const flecs::entity_t Query = EcsQuery;
+FLECS_API_GLOBAL const flecs::entity_t Observer = EcsObserver;
+FLECS_API_GLOBAL const flecs::entity_t Private = EcsPrivate;
+FLECS_API_GLOBAL const flecs::entity_t Module = EcsModule;
+FLECS_API_GLOBAL const flecs::entity_t Prefab = EcsPrefab;
+FLECS_API_GLOBAL const flecs::entity_t Disabled = EcsDisabled;
+FLECS_API_GLOBAL const flecs::entity_t Empty = EcsEmpty;
+FLECS_API_GLOBAL const flecs::entity_t Monitor = EcsMonitor;
+FLECS_API_GLOBAL const flecs::entity_t System = EcsSystem;
+FLECS_API_GLOBAL const flecs::entity_t Pipeline = ecs_id(EcsPipeline);
+FLECS_API_GLOBAL const flecs::entity_t Phase = EcsPhase;
 
 /* Builtin event tags */
-static const flecs::entity_t OnAdd = EcsOnAdd;
-static const flecs::entity_t OnRemove = EcsOnRemove;
-static const flecs::entity_t OnSet = EcsOnSet;
-static const flecs::entity_t OnTableCreate = EcsOnTableCreate;
-static const flecs::entity_t OnTableDelete = EcsOnTableDelete;
+FLECS_API_GLOBAL const flecs::entity_t OnAdd = EcsOnAdd;
+FLECS_API_GLOBAL const flecs::entity_t OnRemove = EcsOnRemove;
+FLECS_API_GLOBAL const flecs::entity_t OnSet = EcsOnSet;
+FLECS_API_GLOBAL const flecs::entity_t OnTableCreate = EcsOnTableCreate;
+FLECS_API_GLOBAL const flecs::entity_t OnTableDelete = EcsOnTableDelete;
 
 /* Builtin term flags */
-static const uint64_t Self = EcsSelf;
-static const uint64_t Up = EcsUp;
-static const uint64_t Trav = EcsTrav;
-static const uint64_t Cascade = EcsCascade;
-static const uint64_t Desc = EcsDesc;
-static const uint64_t IsVariable = EcsIsVariable;
-static const uint64_t IsEntity = EcsIsEntity;
-static const uint64_t IsName = EcsIsName;
-static const uint64_t TraverseFlags = EcsTraverseFlags;
-static const uint64_t TermRefFlags = EcsTermRefFlags;
+FLECS_API_GLOBAL const uint64_t Self = EcsSelf;
+FLECS_API_GLOBAL const uint64_t Up = EcsUp;
+FLECS_API_GLOBAL const uint64_t Trav = EcsTrav;
+FLECS_API_GLOBAL const uint64_t Cascade = EcsCascade;
+FLECS_API_GLOBAL const uint64_t Desc = EcsDesc;
+FLECS_API_GLOBAL const uint64_t IsVariable = EcsIsVariable;
+FLECS_API_GLOBAL const uint64_t IsEntity = EcsIsEntity;
+FLECS_API_GLOBAL const uint64_t IsName = EcsIsName;
+FLECS_API_GLOBAL const uint64_t TraverseFlags = EcsTraverseFlags;
+FLECS_API_GLOBAL const uint64_t TermRefFlags = EcsTermRefFlags;
 
 /* Builtin entity ids */
-static const flecs::entity_t Flecs = EcsFlecs;
-static const flecs::entity_t FlecsCore = EcsFlecsCore;
-static const flecs::entity_t World = EcsWorld;
+FLECS_API_GLOBAL const flecs::entity_t Flecs = EcsFlecs;
+FLECS_API_GLOBAL const flecs::entity_t FlecsCore = EcsFlecsCore;
+FLECS_API_GLOBAL const flecs::entity_t World = EcsWorld;
 
 /* Component traits */
-static const flecs::entity_t Wildcard = EcsWildcard;
-static const flecs::entity_t Any = EcsAny;
-static const flecs::entity_t This = EcsThis;
-static const flecs::entity_t Transitive = EcsTransitive;
-static const flecs::entity_t Reflexive = EcsReflexive;
-static const flecs::entity_t Final = EcsFinal;
-static const flecs::entity_t PairIsTag = EcsPairIsTag;
-static const flecs::entity_t Exclusive = EcsExclusive;
-static const flecs::entity_t Acyclic = EcsAcyclic;
-static const flecs::entity_t Traversable = EcsTraversable;
-static const flecs::entity_t Symmetric = EcsSymmetric;
-static const flecs::entity_t With = EcsWith;
-static const flecs::entity_t OneOf = EcsOneOf;
-static const flecs::entity_t Trait = EcsTrait;
-static const flecs::entity_t Relationship = EcsRelationship;
-static const flecs::entity_t Target = EcsTarget;
-static const flecs::entity_t CanToggle = EcsCanToggle;
+FLECS_API_GLOBAL const flecs::entity_t Wildcard = EcsWildcard;
+FLECS_API_GLOBAL const flecs::entity_t Any = EcsAny;
+FLECS_API_GLOBAL const flecs::entity_t This = EcsThis;
+FLECS_API_GLOBAL const flecs::entity_t Transitive = EcsTransitive;
+FLECS_API_GLOBAL const flecs::entity_t Reflexive = EcsReflexive;
+FLECS_API_GLOBAL const flecs::entity_t Final = EcsFinal;
+FLECS_API_GLOBAL const flecs::entity_t PairIsTag = EcsPairIsTag;
+FLECS_API_GLOBAL const flecs::entity_t Exclusive = EcsExclusive;
+FLECS_API_GLOBAL const flecs::entity_t Acyclic = EcsAcyclic;
+FLECS_API_GLOBAL const flecs::entity_t Traversable = EcsTraversable;
+FLECS_API_GLOBAL const flecs::entity_t Symmetric = EcsSymmetric;
+FLECS_API_GLOBAL const flecs::entity_t With = EcsWith;
+FLECS_API_GLOBAL const flecs::entity_t OneOf = EcsOneOf;
+FLECS_API_GLOBAL const flecs::entity_t Trait = EcsTrait;
+FLECS_API_GLOBAL const flecs::entity_t Relationship = EcsRelationship;
+FLECS_API_GLOBAL const flecs::entity_t Target = EcsTarget;
+FLECS_API_GLOBAL const flecs::entity_t CanToggle = EcsCanToggle;
 
 /* OnInstantiate trait */
-static const flecs::entity_t OnInstantiate = EcsOnInstantiate;
-static const flecs::entity_t Override = EcsOverride;
-static const flecs::entity_t Inherit = EcsInherit;
-static const flecs::entity_t DontInherit = EcsDontInherit;
+FLECS_API_GLOBAL const flecs::entity_t OnInstantiate = EcsOnInstantiate;
+FLECS_API_GLOBAL const flecs::entity_t Override = EcsOverride;
+FLECS_API_GLOBAL const flecs::entity_t Inherit = EcsInherit;
+FLECS_API_GLOBAL const flecs::entity_t DontInherit = EcsDontInherit;
 
 /* OnDelete/OnDeleteTarget traits */
-static const flecs::entity_t OnDelete = EcsOnDelete;
-static const flecs::entity_t OnDeleteTarget = EcsOnDeleteTarget;
-static const flecs::entity_t Remove = EcsRemove;
-static const flecs::entity_t Delete = EcsDelete;
-static const flecs::entity_t Panic = EcsPanic;
+FLECS_API_GLOBAL const flecs::entity_t OnDelete = EcsOnDelete;
+FLECS_API_GLOBAL const flecs::entity_t OnDeleteTarget = EcsOnDeleteTarget;
+FLECS_API_GLOBAL const flecs::entity_t Remove = EcsRemove;
+FLECS_API_GLOBAL const flecs::entity_t Delete = EcsDelete;
+FLECS_API_GLOBAL const flecs::entity_t Panic = EcsPanic;
 
 /* Builtin relationships */
-static const flecs::entity_t IsA = EcsIsA;
-static const flecs::entity_t ChildOf = EcsChildOf;
-static const flecs::entity_t DependsOn = EcsDependsOn;
-static const flecs::entity_t SlotOf = EcsSlotOf;
+FLECS_API_GLOBAL const flecs::entity_t IsA = EcsIsA;
+FLECS_API_GLOBAL const flecs::entity_t ChildOf = EcsChildOf;
+FLECS_API_GLOBAL const flecs::entity_t DependsOn = EcsDependsOn;
+FLECS_API_GLOBAL const flecs::entity_t SlotOf = EcsSlotOf;
 
 /* Builtin identifiers */
-static const flecs::entity_t Name = EcsName;
-static const flecs::entity_t Symbol = EcsSymbol;
+FLECS_API_GLOBAL const flecs::entity_t Name = EcsName;
+FLECS_API_GLOBAL const flecs::entity_t Symbol = EcsSymbol;
 
 /* Storage */
-static const flecs::entity_t Sparse = EcsSparse;
-static const flecs::entity_t Union = EcsUnion;
+FLECS_API_GLOBAL const flecs::entity_t Sparse = EcsSparse;
+FLECS_API_GLOBAL const flecs::entity_t Union = EcsUnion;
 
 /* Builtin predicates for comparing entity ids in queries. */
-static const flecs::entity_t PredEq = EcsPredEq;
-static const flecs::entity_t PredMatch = EcsPredMatch;
-static const flecs::entity_t PredLookup = EcsPredLookup;
+FLECS_API_GLOBAL const flecs::entity_t PredEq = EcsPredEq;
+FLECS_API_GLOBAL const flecs::entity_t PredMatch = EcsPredMatch;
+FLECS_API_GLOBAL const flecs::entity_t PredLookup = EcsPredLookup;
 
 /* Builtin marker entities for query scopes */
-static const flecs::entity_t ScopeOpen = EcsScopeOpen;
-static const flecs::entity_t ScopeClose = EcsScopeClose;
+FLECS_API_GLOBAL const flecs::entity_t ScopeOpen = EcsScopeOpen;
+FLECS_API_GLOBAL const flecs::entity_t ScopeClose = EcsScopeClose;
 
 /** @} */
 
diff --git a/include/flecs/addons/cpp/component.hpp b/include/flecs/addons/cpp/component.hpp
index 58e82739ff..f7cee3a0fd 100644
--- a/include/flecs/addons/cpp/component.hpp
+++ b/include/flecs/addons/cpp/component.hpp
@@ -5,8 +5,10 @@
 
 #pragma once
 
+#ifndef FLECS_CUSTOM_STD_INCLUDE
 #include <ctype.h>
 #include <stdio.h>
+#endif
 
 /**
  * @defgroup cpp_components Components
@@ -260,7 +262,7 @@ struct type_impl {
         (void)name;
         (void)allow_tag;
 
-        ecs_assert(registered(world), ECS_INVALID_OPERATION, 
+        ecs_assert(registered(world), ECS_INVALID_OPERATION,
             "component '%s' was not registered before use",
             type_name<T>());
 #endif
diff --git a/include/flecs/addons/cpp/delegate.hpp b/include/flecs/addons/cpp/delegate.hpp
index c9bdad7ff4..59cc8c2f03 100644
--- a/include/flecs/addons/cpp/delegate.hpp
+++ b/include/flecs/addons/cpp/delegate.hpp
@@ -5,12 +5,14 @@
 
 #pragma once
 
+#ifndef FLECS_CUSTOM_STD_INCLUDE
 #include <utility> // std::declval
+#endif
 
 namespace flecs
 {
 
-namespace _ 
+namespace _
 {
 
 // Binding ctx for component hooks
@@ -66,7 +68,7 @@ struct field_ptrs {
 private:
     void populate(const ecs_iter_t*, size_t) { }
 
-    template <typename T, typename... Targs, 
+    template <typename T, typename... Targs,
         typename A = remove_pointer_t<actual_type_t<T>>,
             if_not_t< is_empty<A>::value > = 0>
     void populate(const ecs_iter_t *iter, size_t index, T, Targs... comps) {
@@ -76,7 +78,7 @@ struct field_ptrs {
             fields_[index].is_ref = true;
             fields_[index].index = static_cast<int8_t>(index);
         } else {
-            fields_[index].ptr = ecs_field_w_size(iter, sizeof(A), 
+            fields_[index].ptr = ecs_field_w_size(iter, sizeof(A),
                 static_cast<int8_t>(index));
             fields_[index].is_ref = iter->sources[index] != 0;
         }
@@ -84,7 +86,7 @@ struct field_ptrs {
         populate(iter, index + 1, comps ...);
     }
 
-    template <typename T, typename... Targs, 
+    template <typename T, typename... Targs,
         typename A = remove_pointer_t<actual_type_t<T>>,
             if_t< is_empty<A>::value > = 0>
     void populate(const ecs_iter_t *iter, size_t index, T, Targs... comps) {
@@ -93,11 +95,11 @@ struct field_ptrs {
 
     void populate_self(const ecs_iter_t*, size_t) { }
 
-    template <typename T, typename... Targs, 
+    template <typename T, typename... Targs,
         typename A = remove_pointer_t<actual_type_t<T>>,
             if_not_t< is_empty<A>::value > = 0>
     void populate_self(const ecs_iter_t *iter, size_t index, T, Targs... comps) {
-        fields_[index].ptr = ecs_field_w_size(iter, sizeof(A), 
+        fields_[index].ptr = ecs_field_w_size(iter, sizeof(A),
             static_cast<int8_t>(index));
         // fields_[index].is_ref = iter->sources[index] != 0;
         fields_[index].is_ref = false;
@@ -122,27 +124,27 @@ struct each_field { };
 
 // Base class
 struct each_column_base {
-    each_column_base(const _::field_ptr& field, size_t row) 
+    each_column_base(const _::field_ptr& field, size_t row)
         : field_(field), row_(row) {
     }
 
 protected:
     const _::field_ptr& field_;
-    size_t row_;    
+    size_t row_;
 };
 
 // If type is not a pointer, return a reference to the type (default case)
 template <typename T>
-struct each_field<T, if_t< !is_pointer<T>::value && 
-        !is_empty<actual_type_t<T>>::value && is_actual<T>::value > > 
-    : each_column_base 
+struct each_field<T, if_t< !is_pointer<T>::value &&
+        !is_empty<actual_type_t<T>>::value && is_actual<T>::value > >
+    : each_column_base
 {
-    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row) 
+    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row)
         : each_column_base(field, row) { }
 
     T& get_row() {
         return static_cast<T*>(this->field_.ptr)[this->row_];
-    }  
+    }
 };
 
 // If argument type is not the same as actual component type, return by value.
@@ -150,25 +152,25 @@ struct each_field<T, if_t< !is_pointer<T>::value &&
 // A typical scenario where this happens is when using flecs::pair types.
 template <typename T>
 struct each_field<T, if_t< !is_pointer<T>::value &&
-        !is_empty<actual_type_t<T>>::value && !is_actual<T>::value> > 
-    : each_column_base 
+        !is_empty<actual_type_t<T>>::value && !is_actual<T>::value> >
+    : each_column_base
 {
-    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row) 
+    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row)
         : each_column_base(field, row) { }
 
     T get_row() {
         return static_cast<actual_type_t<T>*>(this->field_.ptr)[this->row_];
-    }  
+    }
 };
 
 // If type is empty (indicating a tag) the query will pass a nullptr. To avoid
 // returning nullptr to reference arguments, return a temporary value.
 template <typename T>
-struct each_field<T, if_t< is_empty<actual_type_t<T>>::value && 
-        !is_pointer<T>::value > > 
-    : each_column_base 
+struct each_field<T, if_t< is_empty<actual_type_t<T>>::value &&
+        !is_pointer<T>::value > >
+    : each_column_base
 {
-    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row) 
+    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row)
         : each_column_base(field, row) { }
 
     T get_row() {
@@ -179,11 +181,11 @@ struct each_field<T, if_t< is_empty<actual_type_t<T>>::value &&
 // If type is a pointer (indicating an optional value) don't index with row if
 // the field is not set.
 template <typename T>
-struct each_field<T, if_t< is_pointer<T>::value && 
-        !is_empty<actual_type_t<T>>::value > > 
-    : each_column_base 
+struct each_field<T, if_t< is_pointer<T>::value &&
+        !is_empty<actual_type_t<T>>::value > >
+    : each_column_base
 {
-    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row) 
+    each_field(const flecs::iter_t*, _::field_ptr& field, size_t row)
         : each_column_base(field, row) { }
 
     actual_type_t<T> get_row() {
@@ -215,7 +217,7 @@ struct each_ref_field : public each_field<T> {
         }
 
         if (field.is_row) {
-            field.ptr = ecs_field_at_w_size(iter, sizeof(T), field.index, 
+            field.ptr = ecs_field_at_w_size(iter, sizeof(T), field.index,
                 static_cast<int8_t>(row));
         }
     }
@@ -227,10 +229,10 @@ struct each_delegate : public delegate {
     using Terms = typename field_ptrs<Components ...>::array;
 
     template < if_not_t< is_same< decay_t<Func>, decay_t<Func>& >::value > = 0>
-    explicit each_delegate(Func&& func) noexcept 
+    explicit each_delegate(Func&& func) noexcept
         : func_(FLECS_MOV(func)) { }
 
-    explicit each_delegate(const Func& func) noexcept 
+    explicit each_delegate(const Func& func) noexcept
         : func_(func) { }
 
     // Invoke object directly. This operation is useful when the calling
@@ -293,14 +295,14 @@ struct each_delegate : public delegate {
 
 private:
     // func(flecs::entity, Components...)
-    template <template<typename X, typename = int> class ColumnType, 
+    template <template<typename X, typename = int> class ColumnType,
         typename... Args,
         typename Fn = Func,
         decltype(std::declval<const Fn&>()(
             std::declval<flecs::entity>(),
             std::declval<ColumnType< remove_reference_t<Components> > >().get_row()...), 0) = 0>
     static void invoke_callback(
-        ecs_iter_t *iter, const Func& func, size_t i, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t i, Args... comps)
     {
         ecs_assert(iter->count > 0, ECS_INVALID_OPERATION,
             "no entities returned, use each() without flecs::entity argument");
@@ -311,7 +313,7 @@ struct each_delegate : public delegate {
     }
 
     // func(flecs::iter&, size_t row, Components...)
-    template <template<typename X, typename = int> class ColumnType, 
+    template <template<typename X, typename = int> class ColumnType,
         typename... Args,
         typename Fn = Func,
         decltype(std::declval<const Fn&>()(
@@ -319,7 +321,7 @@ struct each_delegate : public delegate {
             std::declval<size_t&>(),
             std::declval<ColumnType< remove_reference_t<Components> > >().get_row()...), 0) = 0>
     static void invoke_callback(
-        ecs_iter_t *iter, const Func& func, size_t i, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t i, Args... comps)
     {
         flecs::iter it(iter);
         func(it, i, (ColumnType< remove_reference_t<Components> >(iter, comps, i)
@@ -327,23 +329,23 @@ struct each_delegate : public delegate {
     }
 
     // func(Components...)
-    template <template<typename X, typename = int> class ColumnType, 
+    template <template<typename X, typename = int> class ColumnType,
         typename... Args,
         typename Fn = Func,
         decltype(std::declval<const Fn&>()(
             std::declval<ColumnType< remove_reference_t<Components> > >().get_row()...), 0) = 0>
     static void invoke_callback(
-        ecs_iter_t *iter, const Func& func, size_t i, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t i, Args... comps)
     {
         func((ColumnType< remove_reference_t<Components> >(iter, comps, i)
             .get_row())...);
     }
 
-    template <template<typename X, typename = int> class ColumnType, 
-        typename... Args, if_t< 
+    template <template<typename X, typename = int> class ColumnType,
+        typename... Args, if_t<
             sizeof...(Components) == sizeof...(Args)> = 0>
     static void invoke_unpack(
-        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
     {
         ECS_TABLE_LOCK(iter->world, iter->table);
 
@@ -361,14 +363,14 @@ struct each_delegate : public delegate {
         ECS_TABLE_UNLOCK(iter->world, iter->table);
     }
 
-    template <template<typename X, typename = int> class ColumnType, 
+    template <template<typename X, typename = int> class ColumnType,
         typename... Args, if_t< sizeof...(Components) != sizeof...(Args) > = 0>
-    static void invoke_unpack(ecs_iter_t *iter, const Func& func, 
-        size_t index, Terms& columns, Args... comps) 
+    static void invoke_unpack(ecs_iter_t *iter, const Func& func,
+        size_t index, Terms& columns, Args... comps)
     {
         invoke_unpack<ColumnType>(
             iter, func, index + 1, columns, comps..., columns[index]);
-    }    
+    }
 
 public:
     Func func_;
@@ -379,10 +381,10 @@ struct find_delegate : public delegate {
     using Terms = typename field_ptrs<Components ...>::array;
 
     template < if_not_t< is_same< decay_t<Func>, decay_t<Func>& >::value > = 0>
-    explicit find_delegate(Func&& func) noexcept 
+    explicit find_delegate(Func&& func) noexcept
         : func_(FLECS_MOV(func)) { }
 
-    explicit find_delegate(const Func& func) noexcept 
+    explicit find_delegate(const Func& func) noexcept
         : func_(func) { }
 
     // Invoke object directly. This operation is useful when the calling
@@ -413,7 +415,7 @@ struct find_delegate : public delegate {
             std::declval<flecs::entity>(),
             std::declval<ColumnType< remove_reference_t<Components> > >().get_row()...))) = true>
     static flecs::entity invoke_callback(
-        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
     {
         ECS_TABLE_LOCK(iter->world, iter->table);
 
@@ -450,7 +452,7 @@ struct find_delegate : public delegate {
             std::declval<size_t&>(),
             std::declval<ColumnType< remove_reference_t<Components> > >().get_row()...))) = true>
     static flecs::entity invoke_callback(
-        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
     {
         size_t count = static_cast<size_t>(iter->count);
         if (count == 0) {
@@ -465,7 +467,7 @@ struct find_delegate : public delegate {
         ECS_TABLE_LOCK(iter->world, iter->table);
 
         for (size_t i = 0; i < count; i ++) {
-            if (func(it, i, 
+            if (func(it, i,
                 (ColumnType< remove_reference_t<Components> >(iter, comps, i)
                     .get_row())...))
             {
@@ -487,7 +489,7 @@ struct find_delegate : public delegate {
         decltype(bool(std::declval<const Fn&>()(
             std::declval<ColumnType< remove_reference_t<Components> > >().get_row()...))) = true>
     static flecs::entity invoke_callback(
-        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps) 
+        ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
     {
         size_t count = static_cast<size_t>(iter->count);
         if (count == 0) {
@@ -516,10 +518,10 @@ struct find_delegate : public delegate {
         return result;
     }
 
-    template <template<typename X, typename = int> class ColumnType, 
+    template <template<typename X, typename = int> class ColumnType,
         typename... Args, if_t< sizeof...(Components) != sizeof...(Args) > = 0>
-    static flecs::entity invoke_callback(ecs_iter_t *iter, const Func& func, 
-        size_t index, Terms& columns, Args... comps) 
+    static flecs::entity invoke_callback(ecs_iter_t *iter, const Func& func,
+        size_t index, Terms& columns, Args... comps)
     {
         return invoke_callback<ColumnType>(
             iter, func, index + 1, columns, comps..., columns[index]);
@@ -535,10 +537,10 @@ struct find_delegate : public delegate {
 template <typename Func>
 struct run_delegate : delegate {
     template < if_not_t< is_same< decay_t<Func>, decay_t<Func>& >::value > = 0>
-    explicit run_delegate(Func&& func) noexcept 
+    explicit run_delegate(Func&& func) noexcept
         : func_(FLECS_MOV(func)) { }
 
-    explicit run_delegate(const Func& func) noexcept 
+    explicit run_delegate(const Func& func) noexcept
         : func_(func) { }
 
     // Invoke object directly. This operation is useful when the calling
@@ -567,7 +569,7 @@ struct run_delegate : delegate {
 
 template <typename Func>
 struct entity_observer_delegate : delegate {
-    explicit entity_observer_delegate(Func&& func) noexcept 
+    explicit entity_observer_delegate(Func&& func) noexcept
         : func_(FLECS_MOV(func)) { }
 
     // Static function that can be used as callback for systems/triggers
@@ -597,7 +599,7 @@ struct entity_observer_delegate : delegate {
 
 template <typename Func, typename Event>
 struct entity_payload_observer_delegate : delegate {
-    explicit entity_payload_observer_delegate(Func&& func) noexcept 
+    explicit entity_payload_observer_delegate(Func&& func) noexcept
         : func_(FLECS_MOV(func)) { }
 
     // Static function that can be used as callback for systems/triggers
@@ -613,7 +615,7 @@ struct entity_payload_observer_delegate : delegate {
         auto self = static_cast<const entity_payload_observer_delegate*>(
             iter->callback_ctx);
         ecs_assert(self != nullptr, ECS_INTERNAL_ERROR, NULL);
-        ecs_assert(iter->param != nullptr, ECS_INVALID_OPERATION, 
+        ecs_assert(iter->param != nullptr, ECS_INVALID_OPERATION,
             "entity observer invoked without payload");
 
         Event *data = static_cast<Event*>(iter->param);
@@ -628,7 +630,7 @@ struct entity_payload_observer_delegate : delegate {
         auto self = static_cast<const entity_payload_observer_delegate*>(
             iter->callback_ctx);
         ecs_assert(self != nullptr, ECS_INTERNAL_ERROR, NULL);
-        ecs_assert(iter->param != nullptr, ECS_INVALID_OPERATION, 
+        ecs_assert(iter->param != nullptr, ECS_INVALID_OPERATION,
             "entity observer invoked without payload");
 
         Event *data = static_cast<Event*>(iter->param);
@@ -666,13 +668,13 @@ struct entity_with_delegate_impl<arg_list<Args ...>> {
         return true;
     }
 
-    static 
+    static
     bool get_ptrs(world_t *world, flecs::entity_t e, const ecs_record_t *r, ecs_table_t *table,
-        ArrayType& ptrs) 
+        ArrayType& ptrs)
     {
         ecs_assert(table != NULL, ECS_INTERNAL_ERROR, NULL);
-        if (!ecs_table_column_count(table) && 
-            !ecs_table_has_flags(table, EcsTableHasSparse)) 
+        if (!ecs_table_column_count(table) &&
+            !ecs_table_has_flags(table, EcsTableHasSparse))
         {
             return false;
         }
@@ -686,7 +688,7 @@ struct entity_with_delegate_impl<arg_list<Args ...>> {
 
         /* Get column indices for components */
         ColumnArray columns ({
-            ecs_table_get_column_index(real_world, table, 
+            ecs_table_get_column_index(real_world, table,
                 _::type<Args>().id(world))...
         });
 
@@ -714,12 +716,12 @@ struct entity_with_delegate_impl<arg_list<Args ...>> {
         /* Get pointers w/ensure */
         size_t i = 0;
         DummyArray dummy ({
-            (ptrs[i ++] = ecs_ensure_id(world, e, 
+            (ptrs[i ++] = ecs_ensure_id(world, e,
                 _::type<Args>().id(world)), 0)...
         });
 
         return true;
-    }    
+    }
 
     template <typename Func>
     static bool invoke_read(world_t *world, entity_t e, const Func& func) {
@@ -777,8 +779,8 @@ struct entity_with_delegate_impl<arg_list<Args ...>> {
     }
 
     // Utility for storing id in array in pack expansion
-    static size_t store_added(IdArray& added, size_t elem, ecs_table_t *prev, 
-        ecs_table_t *next, id_t id) 
+    static size_t store_added(IdArray& added, size_t elem, ecs_table_t *prev,
+        ecs_table_t *next, id_t id)
     {
         // Array should only contain ids for components that are actually added,
         // so check if the prev and next tables are different.
@@ -859,21 +861,21 @@ struct entity_with_delegate_impl<arg_list<Args ...>> {
         (void)dummy_after;
 
         return true;
-    }    
+    }
 
 private:
-    template <typename Func, typename ... TArgs, 
+    template <typename Func, typename ... TArgs,
         if_t<sizeof...(TArgs) == sizeof...(Args)> = 0>
     static void invoke_callback(
-        const Func& f, size_t, ArrayType&, TArgs&& ... comps) 
+        const Func& f, size_t, ArrayType&, TArgs&& ... comps)
     {
         f(*static_cast<typename base_arg_type<Args>::type*>(comps)...);
     }
 
-    template <typename Func, typename ... TArgs, 
+    template <typename Func, typename ... TArgs,
         if_t<sizeof...(TArgs) != sizeof...(Args)> = 0>
-    static void invoke_callback(const Func& f, size_t arg, ArrayType& ptrs, 
-        TArgs&& ... comps) 
+    static void invoke_callback(const Func& f, size_t arg, ArrayType& ptrs,
+        TArgs&& ... comps)
     {
         invoke_callback(f, arg + 1, ptrs, comps..., ptrs[arg]);
     }
diff --git a/include/flecs/addons/cpp/flecs.hpp b/include/flecs/addons/cpp/flecs.hpp
index 8d7c542e86..b66ca4c70e 100644
--- a/include/flecs/addons/cpp/flecs.hpp
+++ b/include/flecs/addons/cpp/flecs.hpp
@@ -6,7 +6,17 @@
 #pragma once
 
 // STL includes
+#ifndef FLECS_CUSTOM_STD_INCLUDE
 #include <type_traits>
+#endif
+
+#ifndef FLECS_API_STRUCT
+#define FLECS_API_STRUCT
+#endif
+
+#ifndef FLECS_API_GLOBAL
+#define FLECS_API_GLOBAL static
+#endif
 
 /**
  * @defgroup cpp C++ API
@@ -16,19 +26,21 @@
 namespace flecs
 {
 
-struct world;
-struct world_async_stage;
-struct iter;
-struct entity_view;
-struct entity;
-struct type;
-struct table;
-struct table_range;
-struct untyped_component;
-
+FLECS_API_STRUCT struct world;
+FLECS_API_STRUCT struct world_async_stage;
+FLECS_API_STRUCT struct iter;
+FLECS_API_STRUCT struct entity_view;
+FLECS_API_STRUCT struct entity;
+FLECS_API_STRUCT struct type;
+FLECS_API_STRUCT struct table;
+FLECS_API_STRUCT struct table_range;
+FLECS_API_STRUCT struct untyped_component;
+
+FLECS_API_STRUCT
 template <typename T>
 struct component;
 
+FLECS_API_STRUCT
 template <typename T>
 struct ref;
 
diff --git a/include/flecs/addons/cpp/mixins/alerts/decl.hpp b/include/flecs/addons/cpp/mixins/alerts/decl.hpp
index d5b8b5f63c..7c0a971cdd 100644
--- a/include/flecs/addons/cpp/mixins/alerts/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/alerts/decl.hpp
@@ -16,6 +16,7 @@ namespace flecs {
  */
 
 /** Module */
+FLECS_API_STRUCT
 struct alerts {
     using AlertsActive = EcsAlertsActive;
     using Instance = EcsAlertInstance;
@@ -28,9 +29,11 @@ struct alerts {
     alerts(flecs::world& world);
 };
 
+FLECS_API_STRUCT
 template <typename ... Components>
 struct alert;
 
+FLECS_API_STRUCT
 template <typename ... Components>
 struct alert_builder;
 
diff --git a/include/flecs/addons/cpp/mixins/app/builder.hpp b/include/flecs/addons/cpp/mixins/app/builder.hpp
index 9bcd1fae87..15ba6bf328 100644
--- a/include/flecs/addons/cpp/mixins/app/builder.hpp
+++ b/include/flecs/addons/cpp/mixins/app/builder.hpp
@@ -16,6 +16,7 @@ namespace flecs {
  */
 
 /** App builder interface */
+FLECS_API_STRUCT
 struct app_builder {
     app_builder(flecs::world_t *world)
         : world_(world)
diff --git a/include/flecs/addons/cpp/mixins/doc/decl.hpp b/include/flecs/addons/cpp/mixins/doc/decl.hpp
index 7eee2ae0aa..131c78ef2c 100644
--- a/include/flecs/addons/cpp/mixins/doc/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/doc/decl.hpp
@@ -17,19 +17,19 @@ namespace doc {
  */
 
 /** flecs.doc.Description component */
-using Description = EcsDocDescription;
+FLECS_API_STRUCT using Description = EcsDocDescription;
 
 /** flecs.doc.Brief component */
-static const flecs::entity_t Brief = EcsDocBrief;
+FLECS_API_GLOBAL const flecs::entity_t Brief = EcsDocBrief;
 
 /** flecs.doc.Detail component */
-static const flecs::entity_t Detail = EcsDocDetail;
+FLECS_API_GLOBAL const flecs::entity_t Detail = EcsDocDetail;
 
 /** flecs.doc.Link component */
-static const flecs::entity_t Link = EcsDocLink;
+FLECS_API_GLOBAL const flecs::entity_t Link = EcsDocLink;
 
 /** flecs.doc.Color component */
-static const flecs::entity_t Color = EcsDocColor;
+FLECS_API_GLOBAL const flecs::entity_t Color = EcsDocColor;
 
 /** @private */
 namespace _ {
diff --git a/include/flecs/addons/cpp/mixins/id/decl.hpp b/include/flecs/addons/cpp/mixins/id/decl.hpp
index 4cebfedd34..921943e182 100644
--- a/include/flecs/addons/cpp/mixins/id/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/id/decl.hpp
@@ -7,8 +7,8 @@
 
 namespace flecs {
 
-struct id;
-struct entity;
+FLECS_API_STRUCT struct id;
+FLECS_API_STRUCT struct entity;
 
 /**
  * @defgroup cpp_ids Ids
@@ -24,6 +24,7 @@ struct entity;
  * - pair ids
  * - entities with id flags set (like flecs::AUTO_OVERRIDE, flecs::TOGGLE)
  */
+FLECS_API_STRUCT
 struct id {
     id()
         : world_(nullptr)
diff --git a/include/flecs/addons/cpp/mixins/json/decl.hpp b/include/flecs/addons/cpp/mixins/json/decl.hpp
index bfa18d361c..03ee0f8794 100644
--- a/include/flecs/addons/cpp/mixins/json/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/json/decl.hpp
@@ -15,9 +15,9 @@ namespace flecs {
  * @{
  */
 
-using from_json_desc_t = ecs_from_json_desc_t;
-using entity_to_json_desc_t = ecs_entity_to_json_desc_t;
-using iter_to_json_desc_t = ecs_iter_to_json_desc_t;
+FLECS_API_STRUCT using from_json_desc_t = ecs_from_json_desc_t;
+FLECS_API_STRUCT using entity_to_json_desc_t = ecs_entity_to_json_desc_t;
+FLECS_API_STRUCT using iter_to_json_desc_t = ecs_iter_to_json_desc_t;
 
 /** @} */
 
diff --git a/include/flecs/addons/cpp/mixins/meta/decl.hpp b/include/flecs/addons/cpp/mixins/meta/decl.hpp
index 0e7c93debc..2c3c974499 100644
--- a/include/flecs/addons/cpp/mixins/meta/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/meta/decl.hpp
@@ -16,98 +16,98 @@ namespace flecs {
  */
 
 /* Primitive type aliases */
-using bool_t = ecs_bool_t;
-using char_t = ecs_char_t;
-using u8_t = ecs_u8_t;
-using u16_t = ecs_u16_t;
-using u32_t = ecs_u32_t;
-using u64_t = ecs_u64_t;
-using uptr_t = ecs_uptr_t;
-using i8_t = ecs_i8_t;
-using i16_t = ecs_i16_t;
-using i32_t = ecs_i32_t;
-using i64_t = ecs_i64_t;
-using iptr_t = ecs_iptr_t;
-using f32_t = ecs_f32_t;
-using f64_t = ecs_f64_t;
+FLECS_API_STRUCT using bool_t = ecs_bool_t;
+FLECS_API_STRUCT using char_t = ecs_char_t;
+FLECS_API_STRUCT using u8_t = ecs_u8_t;
+FLECS_API_STRUCT using u16_t = ecs_u16_t;
+FLECS_API_STRUCT using u32_t = ecs_u32_t;
+FLECS_API_STRUCT using u64_t = ecs_u64_t;
+FLECS_API_STRUCT using uptr_t = ecs_uptr_t;
+FLECS_API_STRUCT using i8_t = ecs_i8_t;
+FLECS_API_STRUCT using i16_t = ecs_i16_t;
+FLECS_API_STRUCT using i32_t = ecs_i32_t;
+FLECS_API_STRUCT using i64_t = ecs_i64_t;
+FLECS_API_STRUCT using iptr_t = ecs_iptr_t;
+FLECS_API_STRUCT using f32_t = ecs_f32_t;
+FLECS_API_STRUCT using f64_t = ecs_f64_t;
 
 /* Embedded type aliases */
-using member_t = ecs_member_t;
-using enum_constant_t = ecs_enum_constant_t;
-using bitmask_constant_t = ecs_bitmask_constant_t;
+FLECS_API_STRUCT using member_t = ecs_member_t;
+FLECS_API_STRUCT using enum_constant_t = ecs_enum_constant_t;
+FLECS_API_STRUCT using bitmask_constant_t = ecs_bitmask_constant_t;
 
 /* Components */
-using Type = EcsType;
-using TypeSerializer = EcsTypeSerializer;
-using Primitive = EcsPrimitive;
-using Enum = EcsEnum;
-using Bitmask = EcsBitmask;
-using Member = EcsMember;
-using MemberRanges = EcsMemberRanges;
-using Struct = EcsStruct;
-using Array = EcsArray;
-using Vector = EcsVector;
-using Unit = EcsUnit;
+FLECS_API_STRUCT using Type = EcsType;
+FLECS_API_STRUCT using TypeSerializer = EcsTypeSerializer;
+FLECS_API_STRUCT using Primitive = EcsPrimitive;
+FLECS_API_STRUCT using Enum = EcsEnum;
+FLECS_API_STRUCT using Bitmask = EcsBitmask;
+FLECS_API_STRUCT using Member = EcsMember;
+FLECS_API_STRUCT using MemberRanges = EcsMemberRanges;
+FLECS_API_STRUCT using Struct = EcsStruct;
+FLECS_API_STRUCT using Array = EcsArray;
+FLECS_API_STRUCT using Vector = EcsVector;
+FLECS_API_STRUCT using Unit = EcsUnit;
 
 /** Base type for bitmasks */
-struct bitmask {
+FLECS_API_STRUCT struct bitmask {
     uint32_t value;
 };
 
 /* Handles to builtin reflection types */
-static const flecs::entity_t Bool = ecs_id(ecs_bool_t);
-static const flecs::entity_t Char = ecs_id(ecs_char_t);
-static const flecs::entity_t Byte = ecs_id(ecs_byte_t);
-static const flecs::entity_t U8 = ecs_id(ecs_u8_t);
-static const flecs::entity_t U16 = ecs_id(ecs_u16_t);
-static const flecs::entity_t U32 = ecs_id(ecs_u32_t);
-static const flecs::entity_t U64 = ecs_id(ecs_u64_t);
-static const flecs::entity_t Uptr = ecs_id(ecs_uptr_t);
-static const flecs::entity_t I8 = ecs_id(ecs_i8_t);
-static const flecs::entity_t I16 = ecs_id(ecs_i16_t);
-static const flecs::entity_t I32 = ecs_id(ecs_i32_t);
-static const flecs::entity_t I64 = ecs_id(ecs_i64_t);
-static const flecs::entity_t Iptr = ecs_id(ecs_iptr_t);
-static const flecs::entity_t F32 = ecs_id(ecs_f32_t);
-static const flecs::entity_t F64 = ecs_id(ecs_f64_t);
-static const flecs::entity_t String = ecs_id(ecs_string_t);
-static const flecs::entity_t Entity = ecs_id(ecs_entity_t);
-static const flecs::entity_t Constant = EcsConstant;
-static const flecs::entity_t Quantity = EcsQuantity;
+FLECS_API_GLOBAL const flecs::entity_t Bool = ecs_id(ecs_bool_t);
+FLECS_API_GLOBAL const flecs::entity_t Char = ecs_id(ecs_char_t);
+FLECS_API_GLOBAL const flecs::entity_t Byte = ecs_id(ecs_byte_t);
+FLECS_API_GLOBAL const flecs::entity_t U8 = ecs_id(ecs_u8_t);
+FLECS_API_GLOBAL const flecs::entity_t U16 = ecs_id(ecs_u16_t);
+FLECS_API_GLOBAL const flecs::entity_t U32 = ecs_id(ecs_u32_t);
+FLECS_API_GLOBAL const flecs::entity_t U64 = ecs_id(ecs_u64_t);
+FLECS_API_GLOBAL const flecs::entity_t Uptr = ecs_id(ecs_uptr_t);
+FLECS_API_GLOBAL const flecs::entity_t I8 = ecs_id(ecs_i8_t);
+FLECS_API_GLOBAL const flecs::entity_t I16 = ecs_id(ecs_i16_t);
+FLECS_API_GLOBAL const flecs::entity_t I32 = ecs_id(ecs_i32_t);
+FLECS_API_GLOBAL const flecs::entity_t I64 = ecs_id(ecs_i64_t);
+FLECS_API_GLOBAL const flecs::entity_t Iptr = ecs_id(ecs_iptr_t);
+FLECS_API_GLOBAL const flecs::entity_t F32 = ecs_id(ecs_f32_t);
+FLECS_API_GLOBAL const flecs::entity_t F64 = ecs_id(ecs_f64_t);
+FLECS_API_GLOBAL const flecs::entity_t String = ecs_id(ecs_string_t);
+FLECS_API_GLOBAL const flecs::entity_t Entity = ecs_id(ecs_entity_t);
+FLECS_API_GLOBAL const flecs::entity_t Constant = EcsConstant;
+FLECS_API_GLOBAL const flecs::entity_t Quantity = EcsQuantity;
 
 namespace meta {
 
 /* Type kinds supported by reflection system */
-using type_kind_t = ecs_type_kind_t;
-static const type_kind_t PrimitiveType = EcsPrimitiveType;
-static const type_kind_t BitmaskType = EcsBitmaskType;
-static const type_kind_t EnumType = EcsEnumType;
-static const type_kind_t StructType = EcsStructType;
-static const type_kind_t ArrayType = EcsArrayType;
-static const type_kind_t VectorType = EcsVectorType;
-static const type_kind_t CustomType = EcsOpaqueType;
-static const type_kind_t TypeKindLast = EcsTypeKindLast;
+FLECS_API_STRUCT using type_kind_t = ecs_type_kind_t;
+FLECS_API_GLOBAL const type_kind_t PrimitiveType = EcsPrimitiveType;
+FLECS_API_GLOBAL const type_kind_t BitmaskType = EcsBitmaskType;
+FLECS_API_GLOBAL const type_kind_t EnumType = EcsEnumType;
+FLECS_API_GLOBAL const type_kind_t StructType = EcsStructType;
+FLECS_API_GLOBAL const type_kind_t ArrayType = EcsArrayType;
+FLECS_API_GLOBAL const type_kind_t VectorType = EcsVectorType;
+FLECS_API_GLOBAL const type_kind_t CustomType = EcsOpaqueType;
+FLECS_API_GLOBAL const type_kind_t TypeKindLast = EcsTypeKindLast;
 
 /* Primitive type kinds supported by reflection system */
-using primitive_kind_t = ecs_primitive_kind_t;
-static const primitive_kind_t Bool = EcsBool;
-static const primitive_kind_t Char = EcsChar;
-static const primitive_kind_t Byte = EcsByte;
-static const primitive_kind_t U8 = EcsU8;
-static const primitive_kind_t U16 = EcsU16;
-static const primitive_kind_t U32 = EcsU32;
-static const primitive_kind_t U64 = EcsU64;
-static const primitive_kind_t I8 = EcsI8;
-static const primitive_kind_t I16 = EcsI16;
-static const primitive_kind_t I32 = EcsI32;
-static const primitive_kind_t I64 = EcsI64;
-static const primitive_kind_t F32 = EcsF32;
-static const primitive_kind_t F64 = EcsF64;
-static const primitive_kind_t UPtr = EcsUPtr;
-static const primitive_kind_t IPtr = EcsIPtr;
-static const primitive_kind_t String = EcsString;
-static const primitive_kind_t Entity = EcsEntity;
-static const primitive_kind_t PrimitiveKindLast = EcsPrimitiveKindLast;
+FLECS_API_STRUCT using primitive_kind_t = ecs_primitive_kind_t;
+FLECS_API_GLOBAL const primitive_kind_t Bool = EcsBool;
+FLECS_API_GLOBAL const primitive_kind_t Char = EcsChar;
+FLECS_API_GLOBAL const primitive_kind_t Byte = EcsByte;
+FLECS_API_GLOBAL const primitive_kind_t U8 = EcsU8;
+FLECS_API_GLOBAL const primitive_kind_t U16 = EcsU16;
+FLECS_API_GLOBAL const primitive_kind_t U32 = EcsU32;
+FLECS_API_GLOBAL const primitive_kind_t U64 = EcsU64;
+FLECS_API_GLOBAL const primitive_kind_t I8 = EcsI8;
+FLECS_API_GLOBAL const primitive_kind_t I16 = EcsI16;
+FLECS_API_GLOBAL const primitive_kind_t I32 = EcsI32;
+FLECS_API_GLOBAL const primitive_kind_t I64 = EcsI64;
+FLECS_API_GLOBAL const primitive_kind_t F32 = EcsF32;
+FLECS_API_GLOBAL const primitive_kind_t F64 = EcsF64;
+FLECS_API_GLOBAL const primitive_kind_t UPtr = EcsUPtr;
+FLECS_API_GLOBAL const primitive_kind_t IPtr = EcsIPtr;
+FLECS_API_GLOBAL const primitive_kind_t String = EcsString;
+FLECS_API_GLOBAL const primitive_kind_t Entity = EcsEntity;
+FLECS_API_GLOBAL const primitive_kind_t PrimitiveKindLast = EcsPrimitiveKindLast;
 
 /** @} */
 
diff --git a/include/flecs/addons/cpp/mixins/meta/impl.hpp b/include/flecs/addons/cpp/mixins/meta/impl.hpp
index e6f18a8431..92ce9aaacf 100644
--- a/include/flecs/addons/cpp/mixins/meta/impl.hpp
+++ b/include/flecs/addons/cpp/mixins/meta/impl.hpp
@@ -66,18 +66,18 @@ inline void init(flecs::world& world) {
 
     if (!flecs::is_same<i32_t, iptr_t>() && !flecs::is_same<i64_t, iptr_t>()) {
         flecs::_::type<iptr_t>::init(flecs::Iptr, true);
-        ecs_assert(flecs::type_id<iptr_t>() == flecs::Iptr, 
+        ecs_assert(flecs::type_id<iptr_t>() == flecs::Iptr,
             ECS_INTERNAL_ERROR, NULL);
-        // Remove symbol to prevent validation errors, as it doesn't match with 
+        // Remove symbol to prevent validation errors, as it doesn't match with
         // the typename
         ecs_remove_pair(world, flecs::Iptr, ecs_id(EcsIdentifier), EcsSymbol);
     }
 
     if (!flecs::is_same<u32_t, uptr_t>() && !flecs::is_same<u64_t, uptr_t>()) {
         flecs::_::type<uptr_t>::init(flecs::Uptr, true);
-        ecs_assert(flecs::type_id<uptr_t>() == flecs::Uptr, 
+        ecs_assert(flecs::type_id<uptr_t>() == flecs::Uptr,
             ECS_INTERNAL_ERROR, NULL);
-        // Remove symbol to prevent validation errors, as it doesn't match with 
+        // Remove symbol to prevent validation errors, as it doesn't match with
         // the typename
         ecs_remove_pair(world, flecs::Uptr, ecs_id(EcsIdentifier), EcsSymbol);
     }
@@ -148,6 +148,8 @@ inline flecs::entity world::vector() {
 
 } // namespace flecs
 
+extern "C++" {
+
 inline int ecs_serializer_t::value(ecs_entity_t type, const void *v) const {
     return this->value_(this, type, v);
 }
@@ -161,3 +163,4 @@ inline int ecs_serializer_t::value(const T& v) const {
 inline int ecs_serializer_t::member(const char *name) const {
     return this->member_(this, name);
 }
+}
diff --git a/include/flecs/addons/cpp/mixins/meta/opaque.hpp b/include/flecs/addons/cpp/mixins/meta/opaque.hpp
index d1f23803cf..5b887e0492 100644
--- a/include/flecs/addons/cpp/mixins/meta/opaque.hpp
+++ b/include/flecs/addons/cpp/mixins/meta/opaque.hpp
@@ -18,16 +18,18 @@ namespace flecs {
  */
 
 /** Serializer object, used for serializing opaque types */
-using serializer = ecs_serializer_t;
+FLECS_API_STRUCT using serializer = ecs_serializer_t;
 
 /** Serializer function, used to serialize opaque types */
-using serialize_t = ecs_meta_serialize_t;
+FLECS_API_STRUCT using serialize_t = ecs_meta_serialize_t;
 
 /** Type safe variant of serializer function */
+FLECS_API_STRUCT
 template <typename T>
 using serialize = int(*)(const serializer *, const T*);
 
 /** Type safe interface for opaque types */
+FLECS_API_STRUCT
 template <typename T, typename ElemType = void>
 struct opaque {
     opaque(flecs::world_t *w = nullptr) : world(w) {
diff --git a/include/flecs/addons/cpp/mixins/metrics/decl.hpp b/include/flecs/addons/cpp/mixins/metrics/decl.hpp
index 0a394395c6..79d564a168 100644
--- a/include/flecs/addons/cpp/mixins/metrics/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/metrics/decl.hpp
@@ -18,6 +18,7 @@ namespace flecs {
  * @{
  */
 
+FLECS_API_STRUCT
 struct metrics {
     using Value = EcsMetricValue;
     using Source = EcsMetricSource;
diff --git a/include/flecs/addons/cpp/mixins/observer/decl.hpp b/include/flecs/addons/cpp/mixins/observer/decl.hpp
index ebf3f20615..601c425e46 100644
--- a/include/flecs/addons/cpp/mixins/observer/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/observer/decl.hpp
@@ -15,8 +15,9 @@ namespace flecs {
  * @{
  */
 
-struct observer;
+FLECS_API_STRUCT struct observer;
 
+FLECS_API_STRUCT
 template<typename ... Components>
 struct observer_builder;
 
diff --git a/include/flecs/addons/cpp/mixins/pipeline/decl.hpp b/include/flecs/addons/cpp/mixins/pipeline/decl.hpp
index 0ea1f6f248..d94320bb16 100644
--- a/include/flecs/addons/cpp/mixins/pipeline/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/pipeline/decl.hpp
@@ -22,17 +22,17 @@ template <typename ... Components>
 struct pipeline_builder;
 
 /* Builtin pipeline tags */
-static const flecs::entity_t OnStart = EcsOnStart;
-static const flecs::entity_t PreFrame = EcsPreFrame;
-static const flecs::entity_t OnLoad = EcsOnLoad;
-static const flecs::entity_t PostLoad = EcsPostLoad;
-static const flecs::entity_t PreUpdate = EcsPreUpdate;
-static const flecs::entity_t OnUpdate = EcsOnUpdate;
-static const flecs::entity_t OnValidate = EcsOnValidate;
-static const flecs::entity_t PostUpdate = EcsPostUpdate;
-static const flecs::entity_t PreStore = EcsPreStore;
-static const flecs::entity_t OnStore = EcsOnStore;
-static const flecs::entity_t PostFrame = EcsPostFrame;
+FLECS_API_GLOBAL const flecs::entity_t OnStart = EcsOnStart;
+FLECS_API_GLOBAL const flecs::entity_t PreFrame = EcsPreFrame;
+FLECS_API_GLOBAL const flecs::entity_t OnLoad = EcsOnLoad;
+FLECS_API_GLOBAL const flecs::entity_t PostLoad = EcsPostLoad;
+FLECS_API_GLOBAL const flecs::entity_t PreUpdate = EcsPreUpdate;
+FLECS_API_GLOBAL const flecs::entity_t OnUpdate = EcsOnUpdate;
+FLECS_API_GLOBAL const flecs::entity_t OnValidate = EcsOnValidate;
+FLECS_API_GLOBAL const flecs::entity_t PostUpdate = EcsPostUpdate;
+FLECS_API_GLOBAL const flecs::entity_t PreStore = EcsPreStore;
+FLECS_API_GLOBAL const flecs::entity_t OnStore = EcsOnStore;
+FLECS_API_GLOBAL const flecs::entity_t PostFrame = EcsPostFrame;
 
 /** @} */
 
diff --git a/include/flecs/addons/cpp/mixins/query/decl.hpp b/include/flecs/addons/cpp/mixins/query/decl.hpp
index a89e88a353..61263d2d73 100644
--- a/include/flecs/addons/cpp/mixins/query/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/query/decl.hpp
@@ -16,9 +16,11 @@ namespace flecs {
 
 struct query_base;
 
+FLECS_API_STRUCT
 template<typename ... Components>
 struct query;
 
+FLECS_API_STRUCT
 template<typename ... Components>
 struct query_builder;
 
diff --git a/include/flecs/addons/cpp/mixins/query/impl.hpp b/include/flecs/addons/cpp/mixins/query/impl.hpp
index c0c874bc3d..5ff3075434 100644
--- a/include/flecs/addons/cpp/mixins/query/impl.hpp
+++ b/include/flecs/addons/cpp/mixins/query/impl.hpp
@@ -7,19 +7,19 @@
 
 #include "builder.hpp"
 
-namespace flecs 
+namespace flecs
 {
 
 struct query_base {
     query_base() { }
 
     query_base(query_t *q)
-        : query_(q) { 
+        : query_(q) {
             flecs_poly_claim(q);
         }
 
     query_base(const query_t *q)
-        : query_(ECS_CONST_CAST(query_t*, q)) { 
+        : query_(ECS_CONST_CAST(query_t*, q)) {
             flecs_poly_claim(q);
         }
 
@@ -45,7 +45,7 @@ struct query_base {
     query_base& operator=(const query_base& obj) {
         this->query_ = obj.query_;
         flecs_poly_claim(this->query_);
-        return *this; 
+        return *this;
     }
 
     query_base(query_base&& obj) noexcept {
@@ -56,7 +56,7 @@ struct query_base {
     query_base& operator=(query_base&& obj) noexcept {
         this->query_ = obj.query_;
         obj.query_ = nullptr;
-        return *this; 
+        return *this;
     }
 
     flecs::entity entity() {
@@ -78,7 +78,7 @@ struct query_base {
     /** Free persistent query.
      * A persistent query is a query that is associated with an entity, such as
      * system queries and named queries. Persistent queries must be deleted with
-     * destruct(), or will be deleted automatically at world cleanup. 
+     * destruct(), or will be deleted automatically at world cleanup.
      */
     void destruct() {
         ecs_assert(query_->entity != 0, ECS_INVALID_OPERATION, "destruct() "
@@ -106,15 +106,15 @@ struct query_base {
      * - new entities have been matched with
      * - matched entities were deleted
      * - matched components were changed
-     * 
+     *
      * @return true if entities changed, otherwise false.
      */
     bool changed() const {
         return ecs_query_changed(query_);
     }
 
-    /** Get info for group. 
-     * 
+    /** Get info for group.
+     *
      * @param group_id The group id for which to retrieve the info.
      * @return The group info.
      */
@@ -122,8 +122,8 @@ struct query_base {
         return ecs_query_get_group_info(query_, group_id);
     }
 
-    /** Get context for group. 
-     * 
+    /** Get context for group.
+     *
      * @param group_id The group id for which to retrieve the context.
      * @return The group context.
      */
@@ -207,7 +207,7 @@ struct query : query_base, iterable<Components...> {
 
 private:
     ecs_iter_t get_iter(flecs::world_t *world) const override {
-        ecs_assert(query_ != nullptr, ECS_INVALID_PARAMETER, 
+        ecs_assert(query_ != nullptr, ECS_INVALID_PARAMETER,
             "cannot iterate invalid query");
         if (!world) {
             world = query_->world;
diff --git a/include/flecs/addons/cpp/mixins/rest/decl.hpp b/include/flecs/addons/cpp/mixins/rest/decl.hpp
index fac86b2de1..f85b2dc0b4 100644
--- a/include/flecs/addons/cpp/mixins/rest/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/rest/decl.hpp
@@ -15,6 +15,7 @@ namespace flecs {
  * @{
  */
 
+FLECS_API_STRUCT
 using Rest = EcsRest;
 
 namespace rest {
diff --git a/include/flecs/addons/cpp/mixins/script/builder.hpp b/include/flecs/addons/cpp/mixins/script/builder.hpp
index 1a244b7545..54acef4d9f 100644
--- a/include/flecs/addons/cpp/mixins/script/builder.hpp
+++ b/include/flecs/addons/cpp/mixins/script/builder.hpp
@@ -13,6 +13,7 @@ namespace flecs {
  */
 
 /** Script builder interface */
+FLECS_API_STRUCT
 struct script_builder {
     script_builder(flecs::world_t *world, const char *name = nullptr)
         : world_(world)
diff --git a/include/flecs/addons/cpp/mixins/script/decl.hpp b/include/flecs/addons/cpp/mixins/script/decl.hpp
index 21d789acfa..2330d5380d 100644
--- a/include/flecs/addons/cpp/mixins/script/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/script/decl.hpp
@@ -16,7 +16,7 @@ namespace flecs {
  * @{
  */
 
-struct script_builder;
+FLECS_API_STRUCT struct script_builder;
 
 /** @} */
 
diff --git a/include/flecs/addons/cpp/mixins/stats/decl.hpp b/include/flecs/addons/cpp/mixins/stats/decl.hpp
index 2435aa3a64..a7f7ac8351 100644
--- a/include/flecs/addons/cpp/mixins/stats/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/stats/decl.hpp
@@ -16,14 +16,18 @@ namespace flecs {
  */
 
 /** Component that stores world statistics */
+FLECS_API_STRUCT
 using WorldStats = EcsWorldStats;
 
 /** Component that stores system/pipeline statistics */
+FLECS_API_STRUCT
 using PipelineStats = EcsPipelineStats;
 
 /** Component with world summary stats */
+FLECS_API_STRUCT
 using WorldSummary = EcsWorldSummary;
 
+FLECS_API_STRUCT
 struct stats {
     stats(flecs::world& world);
 };
diff --git a/include/flecs/addons/cpp/mixins/system/decl.hpp b/include/flecs/addons/cpp/mixins/system/decl.hpp
index d8203c6879..eef94abd4c 100644
--- a/include/flecs/addons/cpp/mixins/system/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/system/decl.hpp
@@ -15,10 +15,12 @@ namespace flecs {
  * @{
  */
 
+FLECS_API_STRUCT
 using TickSource = EcsTickSource;
 
-struct system;
+FLECS_API_STRUCT struct system;
 
+FLECS_API_STRUCT
 template<typename ... Components>
 struct system_builder;
 
diff --git a/include/flecs/addons/cpp/mixins/term/decl.hpp b/include/flecs/addons/cpp/mixins/term/decl.hpp
index b5a1bdbd54..b2a477b398 100644
--- a/include/flecs/addons/cpp/mixins/term/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/term/decl.hpp
@@ -13,8 +13,8 @@ namespace flecs {
  * @{
  */
 
-struct term;
-struct term_builder;
+FLECS_API_STRUCT struct term;
+FLECS_API_STRUCT struct term_builder;
 
 /** @} */
 
diff --git a/include/flecs/addons/cpp/mixins/timer/decl.hpp b/include/flecs/addons/cpp/mixins/timer/decl.hpp
index ccdf879901..4fd41039c4 100644
--- a/include/flecs/addons/cpp/mixins/timer/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/timer/decl.hpp
@@ -15,10 +15,10 @@ namespace flecs {
  * @{
  */
 
-using Timer = EcsTimer;
-using RateFilter = EcsRateFilter;
+FLECS_API_STRUCT using Timer = EcsTimer;
+FLECS_API_STRUCT using RateFilter = EcsRateFilter;
 
-struct timer;
+FLECS_API_STRUCT struct timer;
 
 /** @} */
 
diff --git a/include/flecs/addons/cpp/mixins/units/decl.hpp b/include/flecs/addons/cpp/mixins/units/decl.hpp
index 05592bcfd5..32cd1abb64 100644
--- a/include/flecs/addons/cpp/mixins/units/decl.hpp
+++ b/include/flecs/addons/cpp/mixins/units/decl.hpp
@@ -6,6 +6,8 @@
 #pragma once
 
 namespace flecs {
+
+FLECS_API_STRUCT
 struct units {
 
 /**
diff --git a/include/flecs/addons/cpp/utils/enum.hpp b/include/flecs/addons/cpp/utils/enum.hpp
index 14a8182a69..9520690c31 100644
--- a/include/flecs/addons/cpp/utils/enum.hpp
+++ b/include/flecs/addons/cpp/utils/enum.hpp
@@ -1,13 +1,15 @@
 /**
  * @file addons/cpp/utils/enum.hpp
  * @brief Compile time enum reflection utilities.
- * 
+ *
  * Discover at compile time valid enumeration constants for an enumeration type
  * and their names. This is used to automatically register enum constants.
  */
 
+#ifndef FLECS_CUSTOM_STD_INCLUDE
 #include <string.h>
 #include <limits>
+#endif
 
 #define FLECS_ENUM_MAX(T) _::to_constant<T, 128>::value
 #define FLECS_ENUM_MAX_COUNT (FLECS_ENUM_MAX(int) + 1)
@@ -71,7 +73,7 @@ namespace _ {
             #define ECS_SIZE_T_STR "unsigned __int64"
         #else
             #define ECS_SIZE_T_STR "unsigned int"
-        #endif 
+        #endif
     #elif defined(__clang__)
         #define ECS_SIZE_T_STR "size_t"
     #else
@@ -87,7 +89,7 @@ namespace _ {
             #define ECS_SIZE_T_STR "unsigned __int32"
         #else
             #define ECS_SIZE_T_STR "unsigned int"
-        #endif 
+        #endif
     #elif defined(__clang__)
         #define ECS_SIZE_T_STR "size_t"
     #else
@@ -101,12 +103,12 @@ namespace _ {
 
 template <typename E>
 constexpr size_t enum_type_len() {
-    return ECS_FUNC_TYPE_LEN(, enum_type_len, ECS_FUNC_NAME) 
+    return ECS_FUNC_TYPE_LEN(, enum_type_len, ECS_FUNC_NAME)
         - (sizeof(ECS_SIZE_T_STR) - 1u);
 }
 
 /** Test if value is valid for enumeration.
- * This function leverages that when a valid value is provided, 
+ * This function leverages that when a valid value is provided,
  * __PRETTY_FUNCTION__ contains the enumeration name, whereas if a value is
  * invalid, the string contains a number or a negative (-) symbol. */
 #if defined(ECS_TARGET_CLANG)
@@ -169,11 +171,11 @@ struct enum_constant_data {
 
 /**
  * @brief Provides utilities for enum reflection.
- * 
+ *
  * This struct provides static functions for enum reflection, including conversion
  * between enum values and their underlying integral types, and iteration over enum
  * values.
- * 
+ *
  * @tparam E The enum type.
  * @tparam Handler The handler for enum reflection operations.
  */
@@ -200,7 +202,7 @@ struct enum_reflection {
      * Recursively divide and conquers the search space to reduce the template-depth. Once
      * recursive division is complete, calls Handle<E>::handle_constant in ascending order,
      * passing the values computed up the chain.
-     * 
+     *
      * @tparam Low The lower bound of the search range, inclusive.
      * @tparam High The upper bound of the search range, inclusive.
      * @tparam Args Additional arguments to be passed through to Handler<E>::handle_constant
@@ -223,10 +225,10 @@ struct enum_reflection {
     /**
      * @brief Iterates over the mask range (Low, High] of enum values between Low and High.
      *
-     * Recursively iterates the search space, looking for enums defined as multiple-of-2 
+     * Recursively iterates the search space, looking for enums defined as multiple-of-2
      * bitmasks. Each iteration, shifts bit to the right until it hits Low, then calls
      * Handler<E>::handle_constant for each bitmask in ascending order.
-     * 
+     *
      * @tparam Low The lower bound of the search range, not inclusive
      * @tparam High The upper bound of the search range, inclusive.
      * @tparam Args Additional arguments to be passed through to Handler<E>::handle_constant
@@ -248,10 +250,10 @@ struct enum_reflection {
     /**
      * @brief Handles enum iteration for gathering reflection data.
      *
-     * Iterates over all enum values up to a specified maximum value 
+     * Iterates over all enum values up to a specified maximum value
      * (each_enum_range<0, Value>), then iterates the rest of the possible bitmasks
      * (each_mask_range<Value, high_bit>).
-     * 
+     *
      * @tparam Value The maximum enum value to iterate up to.
      * @tparam Args Additional arguments to be passed through to Handler<E>::handle_constant
      * @param args Additional arguments to be passed through to Handler<E>::handle_constant
@@ -306,7 +308,7 @@ struct enum_type {
      *
      * Because reflection occurs in-order, we can use current value/last value to determine continuity, and
      * use that as a lookup heuristic later on.
-     * 
+     *
      * @tparam Enum The enum type.
      */
     template <typename Enum>
@@ -322,7 +324,7 @@ struct enum_type {
             // Constant is valid, so fill reflection data.
             auto v = enum_reflection<E, reflection_init>::template to_int<Value>();
             const char *name = enum_constant_to_name<Enum, Value>();
-            
+
             ++enum_type<Enum>::data.max; // Increment cursor as we build constants array.
 
             // If the enum was previously contiguous, and continues to be through the current value...
@@ -400,10 +402,10 @@ struct enum_data {
     enum_data(flecs::world_t *world, _::enum_data_impl<E>& impl)
         : world_(world)
         , impl_(impl) { }
-    
+
 	/**
      * @brief Checks if a given integral value is a valid enum value.
-     * 
+     *
      * @param value The integral value.
      * @return true If the value is a valid enum value.
      * @return false If the value is not a valid enum value.
@@ -418,7 +420,7 @@ struct enum_data {
 
     /**
      * @brief Checks if a given enum value is valid.
-     * 
+     *
      * @param value The enum value.
      * @return true If the value is valid.
      * @return false If the value is not valid.
@@ -429,7 +431,7 @@ struct enum_data {
 
     /**
      * @brief Finds the index into the constants array for a value, if one exists
-     * 
+     *
      * @param value The enum value.
      * @return int The index of the enum value.
      */
@@ -453,7 +455,7 @@ struct enum_data {
 
     /**
      * @brief Finds the index into the constants array for an enum value, if one exists
-     * 
+     *
      * @param value The enum value.
      * @return int The index of the enum value.
      */
diff --git a/include/flecs/addons/cpp/utils/utils.hpp b/include/flecs/addons/cpp/utils/utils.hpp
index 5c48534f5f..3d2490143a 100644
--- a/include/flecs/addons/cpp/utils/utils.hpp
+++ b/include/flecs/addons/cpp/utils/utils.hpp
@@ -1,7 +1,7 @@
 /**
  * @file addons/cpp/utils/utils.hpp
  * @brief Flecs STL (FTL?)
- * 
+ *
  * Flecs STL (FTL?)
  * Minimalistic utilities that allow for STL like functionality without having
  * to depend on the actual STL.
@@ -36,7 +36,7 @@
 #define FLECS_FWD(...) \
   static_cast<decltype(__VA_ARGS__)&&>(__VA_ARGS__)
 
-namespace flecs 
+namespace flecs
 {
 
 namespace _
@@ -46,10 +46,10 @@ namespace _
 struct placement_new_tag_t{};
 constexpr placement_new_tag_t placement_new_tag{};
 template<class Ty> inline void destruct_obj(Ty* _ptr) { _ptr->~Ty(); }
-template<class Ty> inline void free_obj(Ty* _ptr) { 
+template<class Ty> inline void free_obj(Ty* _ptr) {
     if (_ptr) {
-        destruct_obj(_ptr); 
-        ecs_os_free(_ptr); 
+        destruct_obj(_ptr);
+        ecs_os_free(_ptr);
     }
 }
 
@@ -146,7 +146,9 @@ struct always_false {
 
 } // namespace flecs
 
+#ifndef FLECS_CUSTOM_STD_INCLUDE
 #include <stdlib.h>
+#endif
 #include "array.hpp"
 #include "string.hpp"
 #include "enum.hpp"
diff --git a/include/flecs/private/addons.h b/include/flecs/private/addons.h
index 597e475306..e0ac20837a 100644
--- a/include/flecs/private/addons.h
+++ b/include/flecs/private/addons.h
@@ -197,12 +197,17 @@
 #ifdef FLECS_NO_CPP
 #error "FLECS_NO_CPP failed: CPP is required by other addons"
 #endif
+
 #include "../addons/flecs_cpp.h"
 
+#ifndef FLECS_CPP20_MODULE_HEADER
+
 #ifdef __cplusplus
 #include "../addons/cpp/flecs.hpp"
 #endif // __cplusplus
 
+#endif // !FLECS_CPP20_MODULE_HEADER
+
 #endif // FLECS_CPP
 
 #endif
diff --git a/module/CMakeLists.txt b/module/CMakeLists.txt
new file mode 100644
index 0000000000..0c72336200
--- /dev/null
+++ b/module/CMakeLists.txt
@@ -0,0 +1,10 @@
+add_library(flecs-module)
+
+target_sources(flecs-module PUBLIC
+    FILE_SET CXX_MODULES
+    BASE_DIRS ${PROJECT_SOURCE_DIR}/module
+    FILES flecs-module.cpp
+)
+
+target_compile_features(flecs-module PUBLIC cxx_std_20)
+target_link_libraries(flecs-module PRIVATE flecs)
diff --git a/module/flecs-module.cpp b/module/flecs-module.cpp
new file mode 100644
index 0000000000..8fbcf00d99
--- /dev/null
+++ b/module/flecs-module.cpp
@@ -0,0 +1,27 @@
+module;
+
+// TODO: find out why
+#define FLECS_CPP_ENUM_REFLECTION_SUPPORT 0
+
+#define FLECS_CPP20_MODULE_HEADER
+#include "flecs.h"
+#undef FLECS_CPP20_MODULE_HEADER
+
+#include <type_traits>
+#include <stdio.h>
+#include <limits>
+#include <string.h>
+#include <stdlib.h>
+#include <utility>
+#include <ctype.h>
+
+export module flecs;
+
+#define FLECS_CUSTOM_STD_INCLUDE
+#define FLECS_CPP20_MODULE_BODY
+#undef FLECS_API
+#define FLECS_API export
+#define FLECS_API_STRUCT export
+#define FLECS_API_GLOBAL export
+
+#include "flecs/addons/cpp/flecs.hpp"