$ cargo build --release --target aarch64-apple-darwin
   Compiling bluer v0.15.4
error[E0432]: unresolved imports `libc::Ioctl`, `libc::SOCK_CLOEXEC`, `libc::SOCK_NONBLOCK`
 --> ~/.cargo/registry/src/github.com-1ecc6299db9ec823/bluer-0.15.4/src/sock.rs:3:40
  |
3 | use libc::{c_int, sockaddr, socklen_t, Ioctl, SOCK_CLOEXEC, SOCK_NONBLOCK};
  |                                        ^^^^^  ^^^^^^^^^^^^  ^^^^^^^^^^^^^ no `SOCK_NONBLOCK` in the root
  |                                        |      |
  |                                        |      no `SOCK_CLOEXEC` in the root
  |                                        no `Ioctl` in the root
  |
help: a similar name exists in the module
  |
3 | use libc::{c_int, sockaddr, socklen_t, ioctl, SOCK_CLOEXEC, SOCK_NONBLOCK};
  |                                        ~~~~~
help: a similar name exists in the module
  |
3 | use libc::{c_int, sockaddr, socklen_t, Ioctl, O_CLOEXEC, SOCK_NONBLOCK};
  |                                               ~~~~~~~~~
help: a similar name exists in the module
  |
3 | use libc::{c_int, sockaddr, socklen_t, Ioctl, SOCK_CLOEXEC, O_NONBLOCK};
  |                                                             ~~~~~~~~~~

error[E0432]: unresolved imports `libc::SOCK_CLOEXEC`, `libc::SOCK_NONBLOCK`
 --> ~/.cargo/registry/src/github.com-1ecc6299db9ec823/bluer-0.15.4/src/gatt/mod.rs:5:22
  |
5 | use libc::{AF_LOCAL, SOCK_CLOEXEC, SOCK_NONBLOCK, SOCK_SEQPACKET};
  |                      ^^^^^^^^^^^^  ^^^^^^^^^^^^^ no `SOCK_NONBLOCK` in the root
  |                      |
  |                      no `SOCK_CLOEXEC` in the root
  |
help: a similar name exists in the module
  |
5 | use libc::{AF_LOCAL, O_CLOEXEC, SOCK_NONBLOCK, SOCK_SEQPACKET};
  |                      ~~~~~~~~~
help: a similar name exists in the module
  |
5 | use libc::{AF_LOCAL, SOCK_CLOEXEC, O_NONBLOCK, SOCK_SEQPACKET};
  |                                    ~~~~~~~~~~

error[E0432]: unresolved imports `libc::AF_BLUETOOTH`, `libc::SOL_BLUETOOTH`, `libc::TIOCINQ`
  --> ~/.cargo/registry/src/github.com-1ecc6299db9ec823/bluer-0.15.4/src/rfcomm/mod.rs:16:12
   |
16 |     c_int, AF_BLUETOOTH, EAGAIN, EINPROGRESS, MSG_PEEK, SHUT_RD, SHUT_RDWR, SHUT_WR, SOCK_RAW, SOCK_STREAM,
   |            ^^^^^^^^^^^^ no `AF_BLUETOOTH` in the root
17 |     SOL_BLUETOOTH, SOL_SOCKET, SO_ERROR, SO_RCVBUF, TIOCINQ, TIOCOUTQ,
   |     ^^^^^^^^^^^^^ no `SOL_BLUETOOTH` in the root    ^^^^^^^ no `TIOCINQ` in the root

error[E0425]: cannot find function `accept4` in crate `libc`
   --> ~/.cargo/registry/src/github.com-1ecc6299db9ec823/bluer-0.15.4/src/sock.rs:147:15
    |
147 |         libc::accept4(socket.as_raw_fd(), saddr.as_mut_ptr() as *mut _, &mut length, SOCK_CLOEXEC | SOCK_NONBLOCK)
    |               ^^^^^^^ help: a function with a similar name exists: `accept`
    |
   ::: ~/.cargo/registry/src/github.com-1ecc6299db9ec823/libc-0.2.139/src/unix/mod.rs:641:5
    |
641 |     pub fn accept(socket: ::c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> ::c_int;
    |     ---------------------------------------------------------------------------------------------- similarly named function `accept` defined here

Some errors have detailed explanations: E0425, E0432.
For more information about an error, try `rustc --explain E0425`.
error: could not compile `bluer` due to 4 previous errors
warning: build failed, waiting for other jobs to finish...
error: could not compile `bluer` due to 4 previous errors