Cheerp is an open-source, commercial C/C++ compiler for Web applications. It allows to compile virtually any C/C++ code (up to C++14) to WebAssembly, JavaScript, asm.js or a combination thereof.
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Main documentation link: https://github.com/leaningtech/cheerp-meta/wiki
Main project link: https://leaningtech.com/cheerp/
This repository is the main reference for documentation, issue tracking, and release notes. Please contribute to Cheerp!
Cheerp is a C/C++ compiler for the Web, based and integrated into the LLVM/clang infrastructure, and featuring numerous custom optimisation steps to maximise performance and minimise size of the compiled JavaScript/WebAssembly output.
Cheerp is used mainly to port existing C/C++ libraries and applications to HTML5, but can also be used to write high-performance Web applications and components from scratch. C/C++ gets optimised and compiled into JavaScript/WebAssembly, and can easily be deployed as part of a web page.
Cheerp enables C/C++ code to be compiled to WebAssembly, JavaScript, asm.js or a combination thereof. Compared to alternative C/C++ compilers for web applications such as Emscripten, Cheerp:
- Achieves the same near-native runtime performance when compiling to WebAssembly, but can also compile to a JavaScript output with dynamic memory (garbage-collectible output), zero-overhead DOM manipulation and access to WebApis and superior C++-JavaScript interoperability.
- Allows to compile a single code base into a combination of WebAssembly and JavaScript by (optionally) tagging portions of the code with
[[cheerp::genericjs]]and[[cheerp::wasm]]. - Can generate code 30-90% smaller than Emscripten, with faster startup.
Cheerp is open-source software and is free to use for GPLv2 projects. Non-copyleft commercial licenses, commercial support and consulting packages are available from Leaning Technologies.
You can download the latest official release of Cheerp for Windows, Linux and macOS a this address: https://leaningtech.com/cheerp/download/. Installation instructions are available here.
Alternatively, you can build Cheerp from source. Please follow the instructions available here.
To get started, you can have a look at our simple tutorial to build your first JavaScript Hello World, or your first WebAssembly program.
For a more in-depth tutorial, please visit this tutorial: a game of Pong in WebAssembly.
You can get in touch with us using our Gitter chat, or by filing a bug on our Issue tracker.
Documentation is available at https://github.com/leaningtech/cheerp-meta/wiki.