Fix platform-specific compilation for Linux-only features in unix.rs #2410
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Ayush-Raj-Chourasia
requested review from
djc,
Ralith,
gretchenfrage and
mxinden
as code owners
mxinden
reviewed
Oct 5, 2025
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Can you describe why these changes are necessary?
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More specifically: what platform(s) are you trying to build for?
| // mac and ios do not support IP_RECVTOS on dual-stack sockets :( | ||
| // older macos versions also don't have the flag and will error out if we don't ignore it | ||
| #[cfg(not(any(target_os = "openbsd", target_os = "netbsd", solarish)))] | ||
| #[cfg(target_os = "linux")] |
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This now excludes MacOS. Why is IP_RECVTOS not available on MacOS? Note that this works for Firefox on MacOS:
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| #[cfg(all( | ||
| not(any(apple, target_os = "openbsd", target_os = "netbsd", solarish)), | ||
| not(target_os = "linux") | ||
| ))] | ||
| fn recv( |
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Which target_os is not excluded above?
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This PR adds conditional compilation guards for Linux-specific features in unix.rs, such as
IP_RECVTOSandmmsghdr, which are not available on BSD or other non-Linux platforms.#[cfg(target_os = "linux")]to restrict usage of these features to Linux only.This improves cross-platform compatibility and ensures the crate builds cleanly on non-Linux systems.