90868c3dce
An extra benefit of workspaces is that they allow to place lint level settings in a single Cargo.toml; the settings are then inherited by packages in the workspace. Correspondingly, teach rustc_args.py to get the unexpected_cfgs configuration from the workspace Cargo.toml. Note that it is still possible to allow or deny warnings per crate or module, via the #![] attribute syntax. The rust/qemu-api/src/bindings.rs file is an example. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>