脚本问题（WebAssembly）

Question

所以我想将一个简单的c ++文件编译成js并在网络浏览器中运行。我采取的步骤（在Windows上）：

git clone https://github.com/emscripten-core/emsdk.git
cd emsdk
emsdk install latest
emsdk activate latest
emsdk_env.bat --global
emsdk update-tags
emcc -v

最后打印的命令：

emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 1.39.15
clang version 11.0.0 "

然后我试图在main.cpp文件中编译如下所示的“ hello world”：

#include <iostream>
#include <emscripten.h>
int main()
{
    std::cout<< "hello world!" << std::endl;

    return 0;
}

然后在测试文件夹中，我使用了命令：

em++ main.cpp -o 1.html

其中印刷：

cache:INFO: generating system library: libcompiler_rt.a... (this will be cached in "C:\Users\x\.emscripten_cache\wasm\libcompiler_rt.a" for subsequent builds)
cache:INFO:  - ok
cache:INFO: generating system library: libc-wasm.a... (this will be cached in "C:\Users\x\.emscripten_cache\wasm\libc-wasm.a" for subsequent builds)
cache:INFO:  - ok
cache:INFO: generating system library: libc++-noexcept.a... (this will be cached in "C:\Users\x\.emscripten_cache\wasm\libc++-noexcept.a" for subsequent builds)
cache:INFO:  - ok
cache:INFO: generating system library: libc++abi-noexcept.a... (this will be cached in "C:\Users\x\.emscripten_cache\wasm\libc++abi-noexcept.a" for subsequent builds)
cache:INFO:  - ok
cache:INFO: generating system library: libdlmalloc.a... (this will be cached in "C:\Users\x\.emscripten_cache\wasm\libdlmalloc.a" for subsequent builds)
cache:INFO:  - ok
cache:INFO: generating system library: libpthread_stub.a... (this will be cached in "C:\Users\x\.emscripten_cache\wasm\libpthread_stub.a" for subsequent builds)
cache:INFO:  - ok
cache:INFO: generating system library: libc_rt_wasm.a... (this will be cached in "C:\Users\x\.emscripten_cache\wasm\libc_rt_wasm.a" for subsequent builds)
cache:INFO:  - ok
cache:INFO: generating system library: libsockets.a... (this will be cached in "C:\Users\x\.emscripten_cache\wasm\libsockets.a" for subsequent builds)
cache:INFO:  - ok

作为输出，我得到了以下文件：1.html，1.js，1.wasm

当我打开1.html时，我看到这些错误：

both async and sync fetching of the wasm failed
RuntimeError: abort(both async and sync fetching of the wasm failed) at jsStackTrace@file:///E:/emscripten/emsdk/test/1.js:1952:17
stackTrace@file:///E:/emscripten/emsdk/test/1.js:1969:16
abort@file:///E:/emscripten/emsdk/test/1.js:1728:44
getBinary@file:///E:/emscripten/emsdk/test/1.js:1800:10
getBinaryPromise/<@file:///E:/emscripten/emsdk/test/1.js:1822:13
getBinaryPromise@file:///E:/emscripten/emsdk/test/1.js:1821:10
instantiateArrayBuffer@file:///E:/emscripten/emsdk/test/1.js:1865:12
instantiateAsync@file:///E:/emscripten/emsdk/test/1.js:1892:14
createWasm@file:///E:/emscripten/emsdk/test/1.js:1908:3
@file:///E:/emscripten/emsdk/test/1.js:4990:11

我也在Linux上尝试过，但是出现了完全相同的错误。 emscripten SDK的旧版本也不起作用。

任何提示？

Answer 1

使用file://的问题，我认为您需要运行服务器并使用http://。参见：https://emscripten.org/docs/getting_started/FAQ.html#faq-local-webserver。并且：https://emscripten.org/docs/compiling/Running-html-files-with-emrun.html