= help: to override `-D warnings` add `#[allow(elided_named_lifetimes)]`

error: unexpected `cfg` condition name: `fbsd14`
   --> src/fcntl.rs:738:12
    |
738 | #[cfg_attr(fbsd14, doc = " ```")]
    |            ^^^^^^
    |
    = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
    = help: consider using a Cargo feature instead
    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
             [lints.rust]
             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(fbsd14)'] }
    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(fbsd14)");` to the top of the `build.rs`
    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
note: the lint level is defined here
   --> src/lib.rs:46:24
    |
46  | #![cfg_attr(test, deny(warnings))]
    |                        ^^^^^^^^
    = note: `#[deny(unexpected_cfgs)]` implied by `#[deny(warnings)]`

error: elided lifetime has a name
    --> src/sys/socket/sockopt.rs:1332:34
     |
1331 | impl<'a> Set<'a, OsString> for SetOsString<'a> {
     |      -- lifetime `'a` declared here
1332 |     fn new(val: &'a OsString) -> SetOsString {
     |                                  ^^^^^^^^^^^ this elided lifetime gets resolved as `'a`
     |
     = note: `#[deny(elided_named_lifetimes)]` implied by `#[deny(warnings)]`

error: struct `GetOsString` is never constructed
    --> src/sys/socket/sockopt.rs:1298:8
     |
1298 | struct GetOsString<T: AsMut<[u8]>> {
     |        ^^^^^^^^^^^
     |
note: the lint level is defined here
    --> src/lib.rs:48:9
     |
48   | #![deny(unused)]
     |         ^^^^^^
     = note: `#[deny(dead_code)]` implied by `#[deny(unused)]`

error: struct `SetOsString` is never constructed
    --> src/sys/socket/sockopt.rs:1327:8
     |
1327 | struct SetOsString<'a> {
     |        ^^^^^^^^^^^

error: could not compile `nix` (lib) due to 7 previous errors
warning: build failed, waiting for other jobs to finish...
error: could not compile `nix` (lib test) due to 7 previous errors

Exit status: 101