如何使用emmake生成.wasm文件

Question

我在github上有这个项目框架。该项目允许使用SDL lib移动游标。我想把它移植到浏览器中。这些文件是根据此turorial

生成的

的MouseMove / SRC / main.cpp中：

#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;
}

的MouseMove /的CMakeLists.txt：

project(MouseMove)
add_executable(MouseMove src/main.cpp)
target_link_libraries(MouseMove ${SDL2_LIBRARY})
install(TARGETS MouseMove RUNTIME DESTINATION ${BIN_DIR})

的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

我可以使用emake将其编译成可执行文件

• mkdir build && cd build
• cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Debug ../
• emconfigure cmake .
• emmake make

这将生成我能够在我的x86系统上运行的elf可执行文件，它确实可以移动鼠标。如何生成适合WebAssembly基于堆栈的虚拟机的wasm文件？我需要以emcc以某种方式执行此操作，以便它接受cmake配置。