linux-errnos 0.4.0

# linux-errnos

![GitHub Workflow Status (with branch)](https://img.shields.io/github/actions/workflow/status/shurizzle/linux-errnos/unit-test.yml?branch=master&style=for-the-badge)
[![Crates.io](https://img.shields.io/crates/v/linux-errnos?style=for-the-badge)](https://crates.io/crates/linux-errnos)
[![docs.rs](https://img.shields.io/docsrs/linux-errnos?style=for-the-badge)](https://docs.rs/linux-errnos)
![Crates.io](https://img.shields.io/crates/l/linux-errnos?style=for-the-badge)

Cross-arch enumeration of Linux error numbers that may vary across archs.

If `target_arch` is supported a module's top-level `Errno` and `ErrnoIter` (if
`iter` feature flag is present) are re-exported.

### Feature flags

- `std`: enable std support (dealing with std::io::Error).
- `iter`: enable `Errno::iter()` function.
- `libc-compat`: enable `libc` compatibility (global errno).
- `no_std_io-compat`: enable `no_std_io` crate compatibility.
- `all`: enable all the architectures.

#### Other flags

There is a feature flag for each of the "linux/arch/*" directories indicating
the architecture family name. For example there is a linux/arch/x86 that
contains x86/x86_64/x32 implementations and that shares the same errnos.

- `alpha`
- `arc`
- `arm`
- `arm64`
- `csky`
- `hexagon`
- `ia64`
- `loongarch`
- `m68k`
- `microblaze`
- `mips`
- `nios2`
- `openrisc`
- `parisc`
- `powerpc`
- `riscv`
- `s390`
- `sh`
- `sparc`
- `um`
- `x86`
- `xtensa`

There is a feature flag for each of the supported `target_arch` too:

- `x86`
- `x86_64`
- `arm`
- `aarch64`
- `hexagon`
- `s390x`
- `powerpc`
- `powerpc64`
- `mips`
- `mips64`
- `m68k`
- `riscv32`
- `riscv64`
- `sparc`
- `sparc64`
- `loongarch64`

### #![no_std]

Enable `#![no_std]` support by disabling the default `std` feature:

```toml
[dependencies]
linux-errnos = { version = "*", default-features = false }
```

# Code generation

All the code is generated by the an inner crate in the `errno-gen` directory
except for the `src/macros.rs` file, so don't touch auto generated files please.

### MSRV

1.38.0