target | std | host | notes
-------|:---:|:----:|-------
`aarch64-apple-ios-macabi` | ? | | Apple Catalyst on ARM64
-`aarch64-apple-ios-sim` | ? | | Apple iOS Simulator on ARM64
+[`aarch64-apple-ios-sim`](platform-support/aarch64-apple-ios-sim.md) | ✓ | | Apple iOS Simulator on ARM64
`aarch64-apple-tvos` | * | | ARM64 tvOS
`aarch64-unknown-freebsd` | ✓ | ✓ | ARM64 FreeBSD
`aarch64-unknown-hermit` | ? | |
`armv7a-none-eabihf` | * | | ARM Cortex-A, hardfloat
`armv7s-apple-ios` | ✓ | |
`avr-unknown-gnu-atmega328` | * | | AVR. Requires `-Z build-std=core`
+`bpfeb-unknown-none` | * | | BPF (big endian)
+`bpfel-unknown-none` | * | | BPF (little endian)
`hexagon-unknown-linux-musl` | ? | |
`i386-apple-ios` | ✓ | | 32-bit x86 iOS
`i686-apple-darwin` | ✓ | ✓ | 32-bit macOS (10.7+, Lion+)