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Showing content from https://github.com/tbfleming/cib below:

tbfleming/cib: clang running in browser (wasm)

• Pricing

• README

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.

• 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

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

clang running in browser (wasm)

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