Rustix for android, part deux #1577
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gurchetansingh
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Feb 2, 2026
gurchetansingh
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These ioctl wrappers are used by rustix users. For example: https://github.com/Smithay/drm-rs/blob/develop/drm-ffi/src/ioctl.rs#L6 Roughly, they match the ones provided by nix. I'm upstreaming the portion I have personally tested.
Android likes to build host tools (adb, Cuttlefish, ..) via musl, using the same hermetic tree as for Bionic build. And linux-raw-sys isn't in that hermetic tree, so add support for the libc-backend.
It's desirable to enable futex for some cases that will be run on Android. The strategy is just to define the constants needed by the libc ourselves, if libc doesn't provide the necessary constant. Long-term, that could make the libc backend only depend on libc.
Rustix has gone back-and-forth on it's policy on Android. Android platform developers don't want a dependency on linux-raw-sys. This is documented here: bytecodealliance#1095 bytecodealliance#1478 rust-vsock/vsock-rs#60 Android app developers seem to want to use linux-raw-sys though: bytecodealliance#1528 The Android platform developers don't REALLY care about the cargo build though. CI/CD testing on the particular build options Android likes is useful. This MR adds another non-cargo build system (Meson) to the CI/CD, that mirrors the options Android likes. Meson is renowned for being a easy-to-maintain build system. By adding it here, we ensure the continue use of Rustix in core Android platform code.
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