*-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
@deg4uss3r @vladimir-ea @leohowell @madsmtm
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, or will be inferred when compiling on host macOS using
roughly the same logic as xcrun --sdk watchos --show-sdk-path.
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
bootstrap.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.