neodev-cpp

C++ devpack for Neo blockchain

online editors

Code can be compiled using online WebAssembly editors. Suggestion: https://mbebenita.github.io/WasmExplorer/ (Select C++1z or C++17)

Hello World example

class based

Integrated Unit Testing during development

Users can easily write C++ Unit Tests to verify the behavior of contract for given test invocations. So, a complete testing stack can be performed before even generating a nvm (Neo Virtual Machine script) and privatenet/testnet testing.

dependencies

To compile, you will need emscripten emcc, since the process uses using WebAssembly Neo Compiler (see wasm2neo project).

clang + llvm + Binaryen + WABT (specific 2017 version)

A good combination is manually install clang + llvm (WARNING: this will take 30 Gigabytes and several hours)

mkdir make-llvm
cd make-llvm
git clone git@github.com:llvm-mirror/clang.git
git clone git@github.com:llvm-mirror/llvm.git
(cd clang && git checkout e4de58127fa1d8d22ee8043cef9b4d8a807b6cde)
(cd llvm && git checkout 08b86793476e08fc0937e70058e2a94808c988e7)
(mkdir build && cd build && cmake -DLLVM_ENABLE_PROJECTS=clang -G "Unix Makefiles" -DLLVM_TARGETS_TO_BUILD= -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly ../llvm)

You will also need specific version of binaryen and wabt

git clone git@github.com:WebAssembly/binaryen.git
(cd binaryen && git checkout b16768ec9b72d075ae2e36cc85aa216fdf4fd354)

git clone https://github.com/WebAssembly/wabt
(cd wabt && git checkout 8e1f6031e9889ba770c7be4a9b084da5f14456a0)

each of these require specific builds as well.. all cmake style

dependencies II (using EMSDK)

EMSDK looks promising as it is a all-in-one solution for cpp -> wasm. However, it's still slightly

Building EMSDK

git clone https://github.com/emscripten-core/emsdk.git
cd emsdk
./emsdk install latest
# Make the "latest" SDK "active" for the current user. (writes ~/.emscripten file)
./emsdk activate latest
# Activate PATH and other environment variables in the current terminal
source ./emsdk_env.sh

WABT may still be needed...

Building WABT (WebAssembly Toolkit)

git clone git@github.com:WebAssembly/wabt.git
cd wabt
mkdir build
cd build
cmake ..
cmake --build .

dependencies III (using wac)

Another interesting project is wac, for a direct translation and execution of web assembly using C language. No much testing have been done on it, but at least, its docker image is quite small! (less than 2GB)

Building wac

No build info now.

License

MIT 2019