fix: fix the napi wasm entry

Author: aminya

CMakeLists.txt

@@ -95,20 +95,22 @@ if(ZMQ_WASM OR CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
 
   set(CMAKE_LINKER "${EMSCRIPTEN_ROOT}/bin/lld${CMAKE_EXECUTABLE_SUFFIX}" CACHE STRING "Linker" FORCE)
 
+  add_compile_definitions("-D__wasm__" "-D__EMSCRIPTEN__")
+
   # export an indirect function table for napi-wasm
   add_link_options("--export-table")
 
+  add_compile_options("-fwasm-exceptions")
+
   # Add WebAssembly-specific exports for napi-wasm
-  add_link_options("SHELL:-s EXPORTED_FUNCTIONS=['_malloc','_free','napi_wasm_malloc','napi_register_module_v1']")
+  add_link_options("SHELL:-s EXPORTED_FUNCTIONS=['_malloc','_free','_napi_register_wasm_v1']")
   add_link_options("SHELL:-s EXPORTED_RUNTIME_METHODS=['ccall','cwrap']")
   add_link_options("SHELL:-s ALLOW_MEMORY_GROWTH=1")
   add_link_options("SHELL:-s MODULARIZE=1")
-  add_link_options("SHELL:-s EXPORT_NAME='createModule'")
   add_link_options("SHELL:-s ENVIRONMENT='web,worker'")
-  add_link_options("SHELL:--no-entry")
-  add_link_options("SHELL:-Wl,--strip-all")
 
   # Allow undefined symbols on Linux for runtime loading
+  add_link_options("SHELL:-s ERROR_ON_UNDEFINED_SYMBOLS=0")
   add_link_options("SHELL:-Wl,--unresolved-symbols=ignore-all")
 endif()
 

src/module.cc

@@ -117,5 +117,26 @@ Module::Module(Napi::Env env, Napi::Object exports) : MsgTrash(env) {
 }
 }  // namespace zmq
 
+#ifdef ZMQ_WASM
+
+EXTERN_C_START
+NAPI_MODULE_EXPORT uint8_t* napi_wasm_malloc(size_t size) {
+    const size_t align = alignof(size_t);
+
+    if (size > 0) {
+        void* ptr = std::aligned_alloc(align, size);
+        if (ptr != nullptr) {
+            return static_cast<uint8_t*>(ptr);
+        }
+    } else {
+        return reinterpret_cast<uint8_t*>(align);
+    }
+
+    std::abort();
+}
+EXTERN_C_END
+
+#endif
+
 using Module = zmq::Module;
 NODE_API_ADDON(Module)