WebAssembly002 emcc install + 解决 Error: Downloading URL ‘https://storage.googleapis.com/…‘ error

安装教程

// https://developer.mozilla.org/zh-CN/docs/WebAssembly/C_to_Wasmgit clone https://github.com/juj/emsdk.gitcd emsdk# 在 Linux 或者 Mac macOS 上./emsdk install --build=Release sdk-incoming-64bit binaryen-master-64bit./emsdk activate --global --build=Release sdk-incoming-64bit binaryen-master-64bit# 如果在你的 macos 上获得以下错误Error: No tool or SDK found by name 'sdk-incoming-64bit'# 请执行./emsdk install latest# 按照提示配置环境变量即可./emsdk activate latest# 在 Windows 上emsdk install --build=Release sdk-incoming-64bit binaryen-master-64bitemsdk activate --global --build=Release sdk-incoming-64bit binaryen-master-64bit# 注意：Windows 版本的 Visual Studio 2017 已经被支持，但需要在 emsdk install 需要追加 --vs2017 参数。

Error: Downloading URL ‘https://storage.googleapis.com/webassembly/emscripten-releases-builds/deps/node-v16.20.0-linux-x64.tar.xz’: error: installation failed!

$:~/Downloads$ git clone https://github.com/juj/emsdk.git正克隆到 'emsdk'...remote: Enumerating objects: 3754, done.remote: Counting objects: 100% (644/644), done.remote: Compressing objects: 100% (106/106), done.remote: Total 3754 (delta 560), reused 595 (delta 533), pack-reused 3110接收对象中: 100% (3754/3754), 2.18 MiB | 690.00 KiB/s, 完成.处理 delta 中: 100% (2475/2475), 完成.$:~/Downloads$ cd emsdk$:~/Downloads/emsdk$ ./emsdk install --build=Release sdk-incoming-64bit binaryen-master-64biterror: tool or SDK not found: 'sdk-incoming-64bit'$:~/Downloads/emsdk$ ./emsdk install latestResolving SDK alias 'latest' to '3.1.44'Resolving SDK version '3.1.44' to 'sdk-releases-b90507fcf011da61bacfca613569d882f7749552-64bit'Installing SDK 'sdk-releases-b90507fcf011da61bacfca613569d882f7749552-64bit'..Installing tool 'node-16.20.0-64bit'..Error: Downloading URL 'https://storage.googleapis.com/webassembly/emscripten-releases-builds/deps/node-v16.20.0-linux-x64.tar.xz': error: installation failed!

• 只能���看emsdk.py,查找文件下载调用的流程,在浏览器下载后放置在安装目录

  ------------------------------------------------------------------------------------------------------------------------------------------------https://storage.googleapis.com/webassembly/emscripten-releases-builds/deps/node-v16.20.0-linux-x64.tar.xzdownloads/------------------------------------------------------------------------------------------------------------------------------------------------

  • 发现直接放入不起作用，每次运行时会清空文件夹

    > /home/pdd/Downloads/emsdk/emsdk.py(679)download_file()-> print("="*300)(Pdb) p download_even_if_existsTrue

    • 最终修改代码如下:

      def download_and_extract(archive, dest_dir, filename_prefix='', clobber=True):  debug_print('download_and_extract(archive=' + archive + ', dest_dir=' + dest_dir + ')')  url = urljoin(emsdk_packages_url, archive)  download_target = get_download_target(url, download_dir, filename_prefix)  print("-"*300)  print(url)  print(download_dir)  print(KEEP_DOWNLOADS)  print(filename_prefix)  print("-"*300)  # received_download_target = download_file(url, download_dir, not KEEP_DOWNLOADS, filename_prefix)  received_download_target = download_file(url, download_dir, False, filename_prefix)  if not received_download_target:    return False  assert received_download_target == download_target  # Remove the old directory, since we have some SDKs that install into the  # same directory.  If we didn't do this contents of the previous install  # could remain.  if clobber:    remove_tree(dest_dir)  if archive.endswith('.zip'):    return unzip(download_target, dest_dir)  else:    return untargz(download_target, dest_dir)

      • 注:下载需要依赖个各个文件时，有可能浏览器下载得到的和需要的文件名称有所差别，按照要求修改即可

        $:~/Downloads/emsdk$ ./emsdk install latestResolving SDK alias 'latest' to '3.1.44'Resolving SDK version '3.1.44' to 'sdk-releases-b90507fcf011da61bacfca613569d882f7749552-64bit'Installing SDK 'sdk-releases-b90507fcf011da61bacfca613569d882f7749552-64bit'..Skipped installing node-16.20.0-64bit, already installed.Skipped installing releases-b90507fcf011da61bacfca613569d882f7749552-64bit, already installed.All SDK components already installed: 'sdk-releases-b90507fcf011da61bacfca613569d882f7749552-64bit'.$:~/Downloads/emsdk$ ./emsdk activate latestResolving SDK alias 'latest' to '3.1.44'Resolving SDK version '3.1.44' to 'sdk-releases-b90507fcf011da61bacfca613569d882f7749552-64bit'Setting the following tools as active:   node-16.20.0-64bit   releases-b90507fcf011da61bacfca613569d882f7749552-64bitNext steps:- To conveniently access emsdk tools from the command line,  consider adding the following directories to your PATH:    /home/pdd/Downloads/emsdk    /home/pdd/Downloads/emsdk/upstream/emscripten- This can be done for the current shell by running:    source "/home/pdd/Downloads/emsdk/emsdk_env.sh"- Configure emsdk in your shell startup scripts by running:    echo 'source "/home/pdd/Downloads/emsdk/emsdk_env.sh"' >> $HOME/.bash_profile

        (base) pdd@pdd-Dell-G15-5511:~/Downloads/emsdk$ source ./emsdk_env.shSetting up EMSDK environment (suppress these messages with EMSDK_QUIET=1)Adding directories to PATH:PATH += /home/pdd/Downloads/emsdkPATH += /home/pdd/Downloads/emsdk/upstream/emscriptenSetting environment variables:PATH = /home/pdd/Downloads/emsdk:/home/pdd/Downloads/emsdk/upstream/emscripten:/home/pdd/Downloads/video_rtsp/ffmpeg-master-latest-linux64-lgpl/bin:/usr/local/mpich-4.1/bin:/usr/local/cuda-11.4/bin:/home/pdd/anaconda3/bin:/home/pdd/anaconda3/condabin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/pdd/Documents/node-v20.5.0-linux-x64/binEMSDK = /home/pdd/Downloads/emsdkEMSDK_NODE = /home/pdd/Downloads/emsdk/node/16.20.0_64bit/bin/node

        测试

        $:~/Downloads/emsdk$ emcc -vemcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.44 (bec42dac7873903d09d713963e34020c22a8bd2d)clang version 17.0.0 (https://github.com/llvm/llvm-project a8cbd27d1f238e104a5d5ca345d93bc1f4d4ab1f)Target: wasm32-unknown-emscriptenThread model: posixInstalledDir: /home/pdd/Downloads/emsdk/upstream/bin

        #include using namespace std;bool IsBigEndian()  {      int a = 0x1234;      char b =  *(char *)&a;  //通过将int强制类型转换成char单字节，即等于 取b等于a的低地址部分      if( b == 0x12)      {          cout emcmake cmake ..> emmake make