Compiling mio in AIX fails

[ayappanec]

Compiling mio in AIX fails with the below error.,
rustc --crate-name mio --edition=2018 /.cargo/registry/src/index.crates.io-d11c229612889eed/mio-0.8.11/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --cfg 'feature="net"' --cfg 'feature="os-ext"' --cfg 'feature="os-poll"' -C metadata=6daf56d29685c1b2 -C extra-filename=-6daf56d29685c1b2 --out-dir /tmp/pip-install-2doeq8db/tokenizers_a6dcd574fc864cb793f0985f2a16d7f5/target/release/deps -C strip=debuginfo -L dependency=/tmp/pip-install-2doeq8db/tokenizers_a6dcd574fc864cb793f0985f2a16d7f5/target/release/deps --extern libc=/tmp/pip-install-2doeq8db/tokenizers_a6dcd574fc864cb793f0985f2a16d7f5/target/release/deps/liblibc-3a5102201a3aa852.rmeta --cap-lints allow -C link-arg=-bbigtoc -L/opt/freeware/lib -D_ALL_SOURCE -lpython3.9

error[E0432]: unresolved imports `self::selector::event`, `self::selector::Event`, `self::selector::Events`, `self::selector::Selector`
   --> /.cargo/registry/src/index.crates.io-d11c229612889eed/mio-0.8.11/src/sys/unix/mod.rs:18:37
    |
 18 |     pub(crate) use self::selector::{event, Event, Events, Selector};
    |                                     ^^^^^  ^^^^^  ^^^^^^  ^^^^^^^^ no `Selector` in `sys::unix::selector`
    |                                     |      |      |
    |                                     |      |      no `Events` in `sys::unix::selector`
    |                                     |      no `Event` in `sys::unix::selector`
    |                                     no `event` in `sys::unix::selector`
    |
    = help: consider importing this module instead:
            crate::event
 note: found an item that was configured out
   --> /.cargo/registry/src/index.crates.io-d11c229612889eed/mio-0.8.11/src/sys/unix/selector/mod.rs:21:30
    |
 21 | pub(crate) use self::epoll::{event, Event, Events, Selector};
    |                              ^^^^^
 note: found an item that was configured out
   --> /.cargo/registry/src/index.crates.io-d11c229612889eed/mio-0.8.11/src/sys/unix/selector/mod.rs:35:29
    |
 35 | pub(crate) use self::poll::{event, Event, Events, Selector};
    |                             ^^^^^
 note: found an item that was configured out
   --> /.cargo/registry/src/index.crates.io-d11c229612889eed/mio-0.8.11/src/sys/unix/selector/mod.rs:70:31
    |
 70 | pub(crate) use self::kqueue::{event, Event, Events, Selector};
    |                               ^^^^^
    = help: consider importing this struct through its public re-export instead:
            crate::event::Event

[Thomasdezeeuw]

AIX is not supported.

[Thomasdezeeuw]

See https://github.com/tokio-rs/mio?tab=readme-ov-file#platforms for the supported platforms.

[ayappanec]

Noted.
AIX has pollset which is kind of similar to epoll in Linux. I will check what it takes to make it use by mio.

[ecnelises]

I had initial patch for pollset: #1620 . But AIX pollset handle does not support DUPFD (fcntl(ps, F_DUPFD_CLOEXEC, 3)), which is quite a fundamental issue. You may need --cfg mio_unsupported_force_poll_poll to use poll facility.