How to find rust compiler version used by cargo. is it same as rustc --version
If you don't override how Cargo builds your project, i.e. by changing the [build] section of your Cargo configuration or using or adding a toolchain override shorthand if you're using rustup to your Cargo invocation, like cargo +nightly ..., Cargo will use the rustc program to build your project, which means that yes, the version of rustc Cargo uses will be equivalent to rustc --version.
thanks! but is there a way to check rustc version used by cargo . I mean something like cargo rustc --version
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Yes, your command is almost correct, but you need an additional -- before --version:
cargo rustc -- --version
invokes the rustc binary Cargo uses and passes the --version flag to it. (Depending on your package, you might need to further restrict which target should be build by passing an additional argument like --lib or --bin <binary_name> to Cargo, like cargo rustc --lib -- --version for example.)
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