example CMakeLists with WebAssembly?

[WuJiayiSH]

I have a super simple helloworld project:

cmake_minimum_required(VERSION 3.4)
project(helloworld)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

set(SCRIPTX_BACKEND "WebAssembly")
include(ScriptX/CMakeLists.txt)
target_link_libraries(ScriptX )
include_directories(ScriptX/src/include)

set(CMAKE_EXECUTABLE_SUFFIX ".html")
add_executable(helloworld main.cpp)

main.cpp

#include <ScriptX/ScriptX.h>

using namespace script;

class TestClass : public ScriptClass {
 public:
  explicit TestClass(const Local<Object>& scriptObj) : ScriptClass(scriptObj) {}
  ~TestClass() override = default;
  virtual Local<Value> greet(const Arguments& args);
  Local<Value> age(const Arguments& args);
  Local<Value> getSrc();
  void setSrc(const Local<Value>& value);

  static Local<Value> add(const Arguments& args);
  static Local<Value> getVersion();
  static void setVersion(const Local<Value>& value);
  static TestClass* create(const Arguments& args);
};

const ClassDefine<TestClass> TestClassDefAll =
    defineClass<TestClass>("TestClass")
        .nameSpace("script.engine.test")
        .constructor(&TestClass::create)
        .function("add", &TestClass::add)
        .property("version", &TestClass::getVersion, &TestClass::setVersion)
        .instanceFunction("greet", &TestClass::greet)
        .instanceFunction("age", &TestClass::age)
        .instanceProperty("src", &TestClass::getSrc, &TestClass::setSrc)
        .build();

It is complaining missing something like missing rtti in link stage, but I thought it is enabled by default:

[0/1] Re-running CMake...
-- Configuring ScriptX version 3.1.0.
-- Configuring ScriptX using backend WebAssembly.
-- Configuring ScriptX option SCRIPTX_NO_EXCEPTION_ON_BIND_FUNCTION OFF.
-- Configuring ScriptX feature SCRIPTX_FEATURE_INSPECTOR OFF.
-- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)
-- Configuring done
-- Generating done
-- Build files have been written to: D:/Developer/test/build
[18/18] Linking CXX executable helloworld.html
FAILED: helloworld.html
cmd.exe /C "cd . && D:\Developer\emsdk\upstream\emscripten\em++.bat   CMakeFiles/helloworld.dir/main.cpp.o -o helloworld.html   && cd ."
wasm-ld: error: CMakeFiles/helloworld.dir/main.cpp.o: undefined symbol: typeinfo for script::Exception
wasm-ld: error: CMakeFiles/helloworld.dir/main.cpp.o: undefined symbol: vtable for script::Exception
wasm-ld: error: CMakeFiles/helloworld.dir/main.cpp.o: undefined symbol: typeinfo for TestClass
em++: error: 'D:/Developer/emsdk/upstream/bin\wasm-ld.exe -o helloworld.wasm CMakeFiles/helloworld.dir/main.cpp.o -LD:\Developer\emsdk\upstream\emscripten\cache\sysroot\lib\wasm32-emscripten -lGL -lal -lhtml5 -lc -lcompiler_rt -lc++-noexcept -lc++abi-noexcept -ldlmalloc -lc_rt_wasm -lsockets -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --import-undefined --strip-debug --export-if-defined=main --export-if-defined=emscripten_stack_get_end --export-if-defined=emscripten_stack_get_free --export-if-defined=emscripten_stack_init --export-if-defined=stackSave --export-if-defined=stackRestore --export-if-defined=stackAlloc --export-if-defined=__wasm_call_ctors --export-if-defined=fflush --export-if-defined=__errno_location --export-if-defined=malloc --export-if-defined=__start_em_asm --export-if-defined=__stop_em_asm --export-table -z stack-size=5242880 --initial-memory=16777216 --no-entry --max-memory=16777216 --global-base=1024' failed (returned 1)

I'm on quite latest emsdk, updated just before I post.
so look like I need to enable rtti manually?

[LanderlYoung]

Please check out the emscripten demo and github actions (which build and run emscripten target on a Linux build server).
https://github.com/Tencent/ScriptX/blob/main/.github/workflows/unit_tests.yml

Don't know if there is any change in the latest emcc, 2.0.5 is checked to work.