how to install wasm-opt?

[ZHANGWENTAI]

ERROR: wasm-opt is not installed. Install this tool on your system in order to
reduce the size of your contract's Wasm binary.
See https://github.com/WebAssembly/binaryen#tools

I want to compile a Substrate Smart Contract using cargo +nightly contract build . When optimizing wasm file, the error happened.

[martianboy]

You can download the latest release of Binaryen from https://github.com/WebAssembly/binaryen/releases. Once that's done, simply extract the compressed file somewhere. wasm-opt will be in the bin folder.

[ZHANGWENTAI]

thank you~

[williamdes]

In ~/.cargo/bin/ it also works fine

[MendyBerger]

Can also be installed on Debian based Linux distributions with sudo apt install binaryen

[mollyibot]

This seems to not install the latest binaryen.