How can I set default build target for Cargo?

Question

I tried to make 'Hello World' in Rust using this tutorial, but the build command is a bit verbose:

cargo +nightly build --target wasm32-unknown-unknown --release

Is it possible to set the default target for cargo build?

Solution 1

You could use a Cargo configuration file to specify a default target-triple for your project. In your project's root, create a .cargo directory and a config file in it with the following contents:

[build]
target = "wasm32-unknown-unknown"

Solution 2

As listed in the Cargo documentation, you can create a .cargo/config and specify the target:

[build]
target = "my-custom-target"

Comments

[Usagi Ito]

Is it work expectedly too now? I got the warning: warning: unused manifest key: build using 1.47.0-nightly.

[Jeff Muizelaar]

Are you putting it in Cargo.toml?. You need to use .cargo/config

[C. Dunn]

Thank you! And for others reading this in the future, you can see what targets Rust supports using rustc --print target-list.

[Peter Hansen]

@C.Dunn And if using rustup, you can do rustup target list as well.