cannot bind function

```
cmake_minimum_required(VERSION 3.10)

project(CTest)
set( CMAKE_CXX_STANDARD 11 )
if(NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE Release)
endif(NOT CMAKE_BUILD_TYPE)

include_directories(${CMAKE_CURRENT_LIST_DIR}/src)
include_directories(${CMAKE_CURRENT_LIST_DIR}/include)
file(GLOB srcpp src/*.cpp)

add_executable(CTest ${srcpp})
set_target_properties( CTest PROPERTIES LINK_FLAGS "${EMSCRIPTEN_LINK_FLAGS} --bind" )

set(EMSCRIPTEN_LINK_FLAGS "${EMSCRIPTEN_LINK_FLAGS} -s WASM=1")
set(EMSCRIPTEN_LINK_FLAGS "${EMSCRIPTEN_LINK_FLAGS} -std=c++1z -O3 --llvm-lto 1")
set(EMSCRIPTEN_LINK_FLAGS "${EMSCRIPTEN_LINK_FLAGS} -s ASSERTIONS=2")
set(EMSCRIPTEN_LINK_FLAGS "${EMSCRIPTEN_LINK_FLAGS} --memory-init-file 0 -s TOTAL_MEMORY=134217728 -s ALLOW_MEMORY_GROWTH=1")
set(EMSCRIPTEN_LINK_FLAGS "${EMSCRIPTEN_LINK_FLAGS} --bind")
set(EMSCRIPTEN_LINK_FLAGS "${EMSCRIPTEN_LINK_FLAGS} -s ENVIRONMENT=web")
set(EMSCRIPTEN_LINK_FLAGS "${EMSCRIPTEN_LINK_FLAGS} -s MODULARIZE")
set(EMSCRIPTEN_LINK_FLAGS "${EMSCRIPTEN_LINK_FLAGS} -s EXPORT_ES6")
```

i use the cmakelists.txt but can`t bind function