*-apple-watchos
Apple watchOS targets.
Tier: 3
aarch64-apple-watchos
: Apple WatchOS on ARM64.aarch64-apple-watchos-sim
: Apple WatchOS Simulator on ARM64.x86_64-apple-watchos-sim
: Apple WatchOS Simulator on 64-bit x86.arm64_32-apple-watchos
: Apple WatchOS on Arm 64_32.armv7k-apple-watchos
: Apple WatchOS on Armv7k.
Target maintainers
Requirements
These targets are cross-compiled, and require the corresponding watchOS SDK
(WatchOS.sdk
or WatchSimulator.sdk
), as provided by Xcode. To build the
ARM64 targets, Xcode 12 or higher is required.
The path to the SDK can be passed to rustc
using the common SDKROOT
environment variable.
OS version
The minimum supported version is watchOS 5.0.
This can be raised per-binary by changing the deployment target. rustc
respects the common environment variables used by Xcode to do so, in this
case WATCHOS_DEPLOYMENT_TARGET
.
Building the target
The targets can be built by enabling them for a rustc
build in
config.toml
, by adding, for example:
[build]
build-stage = 1
target = ["aarch64-apple-watchos", "aarch64-apple-watchos-sim"]
Using the unstable -Zbuild-std
with a nightly Cargo may also work.
Building Rust programs
Rust programs can be built for these targets by specifying --target
, if
rustc
has been built with support for them. For example:
$ rustc --target aarch64-apple-watchos-sim your-code.rs
Testing
There is no support for running the Rust or standard library testsuite at the moment. Testing has mostly been done manually with builds of static libraries embedded into applications called from Xcode or a simulator.
It hopefully will be possible to improve this in the future.