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rustrust-cargo

Does Cargo support custom profiles?

I often want to compile in release mode with debug = true so that I can read the generated assembly a bit easier. I am currently doing this:

[profile.release]
debug = true

but I don't want any debug symbols in my final release build. I'd like to do something like:

[profile.custom]
debug = true
opt-level = 3
rpath = false
lto = true
debug-assertions = false
codegen-units = 1
panic = 'unwind'

And then run

cargo build --custom

I've read the documentation to no avail.

Solution

  • Does Cargo support custom profiles?

    No, stable releases of Cargo do not support this. It is available as an unstable nightly feature.

    If you are using a nightly version of Cargo, you can create custom profiles in your Cargo.toml:

    cargo-features = ["named-profiles"]

[profile.release-lto]
inherits = "release"
lto = true

    And then use them:

    cargo +nightly build --profile release-lto -Z unstable-options