`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+)