target | std | host | notes
-------|-----|------|-------
+`aarch64-apple-ios-macabi` | ? | | Apple Catalyst on ARM64
`aarch64-apple-tvos` | * | | ARM64 tvOS
-`aarch64-unknown-cloudabi` | ✓ | | ARM64 CloudABI
`aarch64-unknown-freebsd` | ✓ | ✓ | ARM64 FreeBSD
`aarch64-unknown-hermit` | ? | |
-`aarch64-unknown-netbsd` | ? | |
+`aarch64-unknown-netbsd` | ✓ | ✓ |
`aarch64-unknown-openbsd` | ✓ | ✓ | ARM64 OpenBSD
`aarch64-unknown-redox` | ? | | ARM64 Redox OS
`aarch64-uwp-windows-msvc` | ? | |
`aarch64-wrs-vxworks` | ? | |
`armv4t-unknown-linux-gnueabi` | ? | |
+`armv5te-unknown-linux-uclibceabi` | ? | | ARMv5TE Linux with uClibc
`armv6-unknown-freebsd` | ✓ | ✓ | ARMv6 FreeBSD
`armv6-unknown-netbsd-eabihf` | ? | |
`armv7-apple-ios` | ✓ | | ARMv7 iOS, Cortex-a8
-`armv7-unknown-cloudabi-eabihf` | ✓ | | ARMv7 CloudABI, hardfloat
`armv7-unknown-freebsd` | ✓ | ✓ | ARMv7 FreeBSD
-`armv7-unknown-netbsd-eabihf` | ? | |
+`armv7-unknown-netbsd-eabihf` | ✓ | ✓ |
`armv7-wrs-vxworks-eabihf` | ? | |
`armv7a-none-eabihf` | * | | ARM Cortex-A, hardfloat
`armv7s-apple-ios` | ✓ | |
`i386-apple-ios` | ✓ | | 32-bit x86 iOS
`i686-apple-darwin` | ✓ | ✓ | 32-bit macOS (10.7+, Lion+)
`i686-pc-windows-msvc` | ✓ | | 32-bit Windows XP support
-`i686-unknown-cloudabi` | ✓ | | 32-bit CloudABI
`i686-unknown-uefi` | ? | | 32-bit UEFI
`i686-unknown-haiku` | ✓ | ✓ | 32-bit Haiku
-`i686-unknown-netbsd` | ✓ | | NetBSD/i386 with SSE2
+`i686-unknown-netbsd` | ✓ | ✓ | NetBSD/i386 with SSE2
`i686-unknown-openbsd` | ✓ | ✓ | 32-bit OpenBSD
`i686-uwp-windows-gnu` | ? | |
`i686-uwp-windows-msvc` | ? | |
`msp430-none-elf` | * | | 16-bit MSP430 microcontrollers
`powerpc-unknown-linux-gnuspe` | ✓ | | PowerPC SPE Linux
`powerpc-unknown-linux-musl` | ? | |
-`powerpc-unknown-netbsd` | ? | |
+`powerpc-unknown-netbsd` | ✓ | ✓ |
`powerpc-wrs-vxworks` | ? | |
`powerpc-wrs-vxworks-spe` | ? | |
`powerpc64-unknown-freebsd` | ✓ | ✓ | PPC64 FreeBSD (ELFv1 and ELFv2)
`thumbv7a-uwp-windows-msvc` | ✓ | |
`thumbv7neon-unknown-linux-musleabihf` | ? | | Thumb2-mode ARMv7a Linux with NEON, MUSL
`thumbv4t-none-eabi` | * | | ARMv4T T32
-`x86_64-apple-ios-macabi` | ✓ | | Apple Catalyst
+`x86_64-apple-ios-macabi` | ✓ | | Apple Catalyst on x86_64
`x86_64-apple-tvos` | * | | x86 64-bit tvOS
`x86_64-linux-kernel` | * | | Linux kernel modules
`x86_64-pc-solaris` | ? | |
`x86_64-pc-windows-msvc` | ✓ | | 64-bit Windows XP support
-`x86_64-unknown-cloudabi` | ✓ | | 64-bit CloudABI
`x86_64-unknown-dragonfly` | ✓ | ✓ | 64-bit DragonFlyBSD
`x86_64-unknown-haiku` | ✓ | ✓ | 64-bit Haiku
`x86_64-unknown-hermit` | ? | |