WebAssembly (abbreviated Wasm) is a binary instruction format for a stack-based virtual machine. Wasm is designed as a portable target for compilation of high-level languages like C/C++/Rust, enabling deployment on the web for client and server applications.
WebAssembly is an open standard that defines a portable binary code format for executable programs, and a corresponding textual assembly language, as well as interfaces for facilitating interactions between such programs and their host environment.
- Filename extensions:
.wat,.wasm - First appeared: March 2017; 2 years ago
- License: Apache License 2.0
- Typing discipline: Static
- Designed by: World Wide Web Consortium
- Developer: W3C; Mozilla; Microsoft; Google; Apple
$ sudo apt install emscripten # ubuntu
$ sudo pacman -S emscripten # arch, https://www.archlinux.org/packages/community/x86_64/emscripten/
$ git clone https://github.com/emscripten-core/emsdk.git
$ cd emsdk/
$ ls
bin emsdk_env.fish LICENSE
Dockerfile emsdk_env.ps1 python_selector
emcmdprompt.bat emsdk_env.sh README.md
emscripten-releases-tags.txt emsdk_manifest.json test.py
emsdk emsdk.ps1 test.sh
emsdk.bat legacy-binaryen-tags.txt
emsdk_env.bat legacy-emscripten-tags.txt
$ ./emsdk install latest
Fetching emscripten-releases repository...
Cloning into '/home/max/emsdk/releases'...
remote: Total 2564 (delta 747), reused 2564 (delta 747)
Receiving objects: 100% (2564/2564), 1.25 MiB | 662.00 KiB/s, done.
Resolving deltas: 100% (747/747), done.
Fetching latest changes to the branch 'master' for '/home/max/emsdk/releases'...
Already up to date.
Successfully updated and checked out branch 'master' on repository '/home/max/emsdk/releases'
Current repository version: "Fri, 19 Jul 2019 05:41:08 +0000 d2967ba63d9c00c31b31f59702beba400921c7ca"
Fetching all precompiled tagged releases..
Downloading: /home/max/emsdk/llvm-tags-32bit.txt from https://s3.amazonaws.com/mozilla-games/emscripten/packages/llvm/tag/linux_32bit/index.txt
Downloading: /home/max/emsdk/llvm-tags-64bit.txt from https://s3.amazonaws.com/mozilla-games/emscripten/packages/llvm/tag/linux_64bit/index.txt, 2379 Bytes
Installing SDK 'sdk-releases-fastcomp-f42b12c45fd3f4c20de1321402fbc28f8fd21df1-64bit'..
Installing tool 'releases-fastcomp-f42b12c45fd3f4c20de1321402fbc28f8fd21df1-64bit'..
Downloading: /home/max/emsdk/zips/f42b12c45fd3f4c20de1321402fbc28f8fd21df1-wasm-binaries.tbz2 from https://storage.googleapis.com/webassembly/emscripten-releases-builds/linux/f42b12c45fd3f4c20de1321402fbc28f8fd21df1/wasm-binaries.tbz2, 166664114 Bytes
Unpacking '/home/max/emsdk/zips/f42b12c45fd3f4c20de1321402fbc28f8fd21df1-wasm-binaries.tbz2' to '/home/max/emsdk/fastcomp'
Done installing tool 'releases-fastcomp-f42b12c45fd3f4c20de1321402fbc28f8fd21df1-64bit'.
Installing tool 'node-8.9.1-64bit'..
Downloading: /home/max/emsdk/zips/node-v8.9.1-linux-x64.tar.xz from https://storage.googleapis.com/webassembly/emscripten-releases-builds/deps/node-v8.9.1-linux-x64.tar.xz, 11387108 Bytes
Unpacking '/home/max/emsdk/zips/node-v8.9.1-linux-x64.tar.xz' to '/home/max/emsdk/node/8.9.1_64bit'
Done installing tool 'node-8.9.1-64bit'.
Done installing SDK 'sdk-releases-fastcomp-f42b12c45fd3f4c20de1321402fbc28f8fd21df1-64bit'.
$ ./emsdk activate latest
Writing .emscripten configuration file to user home directory /home/max/
The Emscripten configuration file /home/max/.emscripten has been rewritten with the following contents:
import os
LLVM_ROOT = '/home/max/emsdk/fastcomp/fastcomp/bin'
BINARYEN_ROOT = '/home/max/emsdk/fastcomp'
EMSCRIPTEN_NATIVE_OPTIMIZER = '/home/max/emsdk/fastcomp/bin/optimizer'
NODE_JS = '/home/max/emsdk/node/8.9.1_64bit/bin/node'
SPIDERMONKEY_ENGINE = ''
V8_ENGINE = ''
TEMP_DIR = '/tmp'
COMPILER_ENGINE = NODE_JS
JS_ENGINES = [NODE_JS]
To conveniently access the selected set of tools from the command line, consider adding the following directories to PATH, or call 'source ./emsdk_env.sh' to do this for you.
/home/max/emsdk:/home/max/emsdk/fastcomp/emscripten:/home/max/emsdk/node/8.9.1_64bit/bin
Set the following tools as active:
releases-fastcomp-f42b12c45fd3f4c20de1321402fbc28f8fd21df1-64bit
node-8.9.1-64bit
$ emcc hello.c -s WASM=1 -o hello.html
To serve the compiled files over HTTP, we can use the emrun web server provided with the Emscripten SDK:
$ emrun --no_browser --port 8080 .
My nickname is Max, Programming language developer, Full-stack programmer. I love computer scientists, researchers, and compilers.
A team includes some programmer, developer, designer, researcher(s) especially Max Base.