How to produce .wasm file using emmake - makefile

Question

I have this project skeleton on github The project allows to move a cursor using SDL lib. Which I want to port afterward into browser. The files were generated based on this turorial
MouseMove/src/main.cpp:
#include <iostream>
#include <SDL.h>
#include <unistd.h>
int main(int, char**){
if (SDL_Init(SDL_INIT_VIDEO) != 0){
std::cout << "SDL_Init Error: " << SDL_GetError() << std::endl;
return 1;
}
SDL_Window *window = SDL_CreateWindow(
"Mouse coordinates test", 0, 0, 100, 100,
NULL);
usleep(1000);
SDL_WarpMouseInWindow(window , 600, 600);
SDL_Quit();
return 0;
}
MouseMove/CMakeLists.txt:
project(MouseMove)
add_executable(MouseMove src/main.cpp)
target_link_libraries(MouseMove ${SDL2_LIBRARY})
install(TARGETS MouseMove RUNTIME DESTINATION ${BIN_DIR})
CMakeLists.txt:
cmake_minimum_required(VERSION 2.6)
project(webassembly_plugin)
# Use our modified FindSDL2* modules
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${webassembly_plugin_SOURCE_DIR}/cmake")
# Set an output directory for our binaries
set(BIN_DIR ${webassembly_plugin_SOURCE_DIR}/bin)
# Bump up warning levels appropriately for clang, gcc & msvc
# Also set debug/optimization flags depending on the build type. IDE users choose this when
# selecting the build mode in their IDE
if (${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU" OR ${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic -std=c++11")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_DEBUG} -g")
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_RELEASE} -O2")
elseif (${CMAKE_CXX_COMPILER_ID} STREQUAL "MSVC")
if (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
else()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
endif()
endif()
# Look up SDL2 and add the include directory to our include path
find_package(SDL2 REQUIRED)
include_directories(${SDL2_INCLUDE_DIR})
# Look in the Lesson0 subdirectory to find its CMakeLists.txt so we can build the executable
add_subdirectory(MouseMove)
cmake/FindSDL2.cmake
I can compile it into an executable file using emake
mkdir build && cd build
cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Debug ../
emconfigure cmake .
emmake make
This will generate elf executable that I'm able to run on my x86 system and it indeed moves the mouse. How do I produce wasm file that's suitable for WebAssembly stack-based virtual machine? I need to execute this with emcc somehow so it accepts cmake configuration.