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After following the compilation instructions for my Parity Substrate based node, I repeatedly run into the following issue:

./build.sh: line 12: wasm-gc: command not found

I cannot build parity substrate runtimes because the wasm-gc command isn't found; what can I do?

q9f
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1 Answers1

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There are two potential reasons why you would run into that issue.

1 make sure wasm-gc is installed

To do so, simply use cargo:

cargo install --git https://github.com/alexcrichton/wasm-gc

This will install wasm-gc binary in your $CARGO_HOME.

2 make sure cargo binaries are in your $PATH

If you are certain the wasm-gc binary is installed correctly, make sure you have the cargo binaries in your $PATH, e.g., by setting:

export PATH=$PATH:$HOME/.cargo/bin

It's recommended to append this line to your .bashrc or .zshrc if you plan on using this more regularly.

q9f
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    Update October 2019: As of this PR https://github.com/paritytech/substrate/pull/3854 There is no longer a need to manually install `wasm-gc`. It is brought in as a dev- dependency through `Cargo.toml`. – JoshOrndorff Nov 19 '19 at 21:59