Update emsdk version from 9308e6ad to 926b6837 (#27406) This is an automatic change generated by tools/maint/rebaseline_tests.py --update-emsdk. emsdk version updated: 9308e6ad => 926b6837 The following revisions were included in this update: ``` - 926b6837 Roll llvm-project from f2a284b4732b to 074568806993 (31 revisions) - 196097cc Roll binaryen from acf302c4ea3b to 355863c2168e (2 revisions) - 9e8722df Roll binaryen from 108e796b9b04 to acf302c4ea3b (1 revision) - 6b4afe90 Roll llvm-project from 9d2000c24d7b to f2a284b4732b (50 revisions) - b53037c6 Roll emscripten from 6d8b2c1707b0 to c43384efaa10 (1 revision) - c76518a9 Roll llvm-project from 6f47123da420 to 9d2000c24d7b (47 revisions) - 98d1f201 Roll llvm-project from 9925bcf8d945 to 6f47123da420 (38 revisions) ``` Full log: https://chromium.googlesource.com/emscripten-releases/+log/9308e6ad..926b6837 The following (1) test expectation files were updated by running the tests with `--rebaseline`: ``` codesize/test_codesize_cxx_mangle.json: 262045 => 262056 [+11 bytes / +0.00%] Average change: +0.00% (+0.00% - +0.00%) ``` Co-authored-by: emscripten-bot <emscripten-bot@users.noreply.github.com>
Main project page: https://emscripten.org
GitHub CI status: 
Chromium builder status: emscripten-releases
Emscripten compiles C and C++ to WebAssembly using LLVM and Binaryen. Emscripten output can run on the Web, in Node.js, and in wasm runtimes.
Emscripten provides Web support for popular portable APIs such as OpenGL and SDL2, allowing complex graphical native applications to be ported, such as the Unity game engine and Google Earth. It can probably port your codebase, too!
While Emscripten mostly focuses on compiling C and C++ using Clang, it can be integrated with other LLVM-using compilers (for example, Rust has Emscripten integration, with the wasm32-unknown-emscripten target).
For detailed instructions and tutorials, visit the Emscripten Website.
There are two primary ways to install Emscripten:
Using the Emscripten SDK (emsdk) (Recommended) The easiest way to get started is by using the Emscripten SDK. Follow the instructions on the downloads page to install it.
From a Git Checkout (Manual Installation) If you have cloned the repository from Git, you can install the dependencies manually and then run the bootstrap script:
./bootstrap.py
For more details, see the developer guide.
Run emcc like you would gcc or clang:
$ emcc hello.c -o hello.js $ node hello.js Hello, world!
Emscripten will compile your code into a WebAssembly module along with a JavaScript file that can load and run it. You can then run the resulting JavaScript in your browser or under Node.js (or Deno or Bun).
Emscripten can also generate a sample HTML page that then loads the JavaScript:
$ emcc hello.c -o hello.html
You can then serve the generated hello.html using the emrun tool, or a web server of your choosing.
For information on how to contribute to the project, see CONTRIBUTING.md and the Contributing section on the website.
Emscripten is available under 2 licenses, the MIT license and the University of Illinois/NCSA Open Source License.
Both are permissive open source licenses, with little if any practical difference between them.
The reason for offering both is that (1) the MIT license is well-known and suitable for a compiler toolchain, while (2) LLVM‘s original license, the University of Illinois/NCSA Open Source License, was also offered to allow Emscripten’s code to be integrated upstream into LLVM. The second reason became less important after Emscripten switched to the LLVM wasm backend, at which point there isn't any code we expect to move back and forth between the projects; also, LLVM relicensed to Apache 2.0 + exceptions meanwhile. In practice you can just consider Emscripten as MIT licensed (which allows you to do pretty much anything you want with a compiler, including commercial and non-commercial use).
See LICENSE for the full content of the licenses.