https://github.com/tbfleming/cib

clang running in browser (wasm)
https://github.com/tbfleming/cib

clang emscripten wasm

Last synced: 18 days ago
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clang running in browser (wasm)

• Host: GitHub
• URL: https://github.com/tbfleming/cib
• Owner: tbfleming
• Created: 2017-12-11T17:02:24.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2022-10-22T10:00:03.000Z (about 2 years ago)
• Last Synced: 2024-07-31T22:42:24.539Z (3 months ago)
• Topics: clang, emscripten, wasm
• Language: C++
• Homepage: https://tbfleming.github.io/cib/
• Size: 139 MB
• Stars: 833
• Watchers: 38
• Forks: 57
• Open Issues: 17
• Metadata Files:
  • Readme: README.md

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README

        
## Clang In Browser (cib)

Try it at https://tbfleming.github.io/cib/

I'm trying to see how far wasm can go. Is it possible to compile clang to wasm and have it generate code within the browser?

Current status:

* Works in Firefox 57 and Chrome 63

Change log:

* Build EOS contracts: https://tbfleming.github.io/cib/eos.html

* Integrate with user HTML

* Load gists

* Load header libraries in .zip files

* The runtime now consumes much less memory with each press of the Run button

* Standard library globals (e.g. ```cout```)

* Global constructors

* Function pointers and virtual functions

* RTTI

Currently missing:

* Global destructors

* Exception handling

* stdin / cin. Waiting on browsers to restore SharedArrayBuffer.

## VM for building clang

* Create a fresh VM to build with. The build will probably fail if you already have emscripten or clang installed.

* Consider using a high thread-count VM; e.g. an EC2 c5.9xlarge.

* I put the repo in a dedicated volume while building; this aids using spot instances. 100 GB.

Ubuntu 16.04:

```

sudo apt update

sudo apt upgrade

sudo apt install build-essential cmake ninja-build python nodejs-legacy libncurses-dev unzip libboost1.58-tools-dev

```

## Building WASM binaries

```

./build.py -a

```

This script:

* Clones needed repos

* Builds an llvm toolchain for targeting WASM

* Builds emscripten

* Invokes emscripten to:

  * set up environment

  * build emscripten's dependances

* Uses emscripten to build llvm libraries

* Builds the apps