From 56795fb77a69bc61836537175564455067adada6 Mon Sep 17 00:00:00 2001 From: Flakebi Date: Thu, 2 Jan 2025 15:19:43 +0100 Subject: [PATCH] Add amdgpu target Add target and compile the amdgpu llvm backend. --- compiler/rustc_target/src/spec/mod.rs | 2 + .../src/spec/targets/amdgcn_amd_amdhsa.rs | 51 ++++++++ config.example.toml | 2 +- src/bootstrap/download-ci-llvm-stamp | 2 +- src/bootstrap/src/core/build_steps/llvm.rs | 2 +- src/doc/rustc/src/SUMMARY.md | 1 + src/doc/rustc/src/platform-support.md | 2 + .../src/platform-support/amdgcn-amd-amdhsa.md | 111 ++++++++++++++++++ src/tools/build-manifest/src/main.rs | 1 + tests/assembly/targets/targets-amdgpu.rs | 21 ++++ .../amdgpu-require-explicit-cpu.nocpu.stderr | 4 + tests/ui/amdgpu-require-explicit-cpu.rs | 17 +++ .../exhaustive-names-values.empty_cfg.stderr | 2 +- .../exhaustive-names-values.feature.stderr | 2 +- .../exhaustive-names-values.full.stderr | 2 +- tests/ui/check-cfg/well-known-values.stderr | 8 +- 16 files changed, 220 insertions(+), 10 deletions(-) create mode 100644 compiler/rustc_target/src/spec/targets/amdgcn_amd_amdhsa.rs create mode 100644 src/doc/rustc/src/platform-support/amdgcn-amd-amdhsa.md create mode 100644 tests/assembly/targets/targets-amdgpu.rs create mode 100644 tests/ui/amdgpu-require-explicit-cpu.nocpu.stderr create mode 100644 tests/ui/amdgpu-require-explicit-cpu.rs diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs index 3fc7a07fb9139..d7241ddecec6d 100644 --- a/compiler/rustc_target/src/spec/mod.rs +++ b/compiler/rustc_target/src/spec/mod.rs @@ -1908,6 +1908,8 @@ supported_targets! { ("nvptx64-nvidia-cuda", nvptx64_nvidia_cuda), + ("amdgcn-amd-amdhsa", amdgcn_amd_amdhsa), + ("xtensa-esp32-none-elf", xtensa_esp32_none_elf), ("xtensa-esp32-espidf", xtensa_esp32_espidf), ("xtensa-esp32s2-none-elf", xtensa_esp32s2_none_elf), diff --git a/compiler/rustc_target/src/spec/targets/amdgcn_amd_amdhsa.rs b/compiler/rustc_target/src/spec/targets/amdgcn_amd_amdhsa.rs new file mode 100644 index 0000000000000..bb488c350c23e --- /dev/null +++ b/compiler/rustc_target/src/spec/targets/amdgcn_amd_amdhsa.rs @@ -0,0 +1,51 @@ +use crate::spec::{Cc, LinkerFlavor, Lld, PanicStrategy, Target, TargetOptions}; + +pub(crate) fn target() -> Target { + Target { + arch: "amdgpu".into(), + data_layout: "e-p:64:64-p1:64:64-p2:32:32-p3:32:32-p4:64:64-p5:32:32-p6:32:32-p7:160:256:256:32-p8:128:128-p9:192:256:256:32-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-S32-A5-G1-ni:7:8:9".into(), + llvm_target: "amdgcn-amd-amdhsa".into(), + metadata: crate::spec::TargetMetadata { + description: Some("AMD GPU".into()), + tier: Some(3), + host_tools: Some(false), + std: Some(false), + }, + pointer_width: 64, + + options: TargetOptions { + os: "amdhsa".into(), + vendor: "amd".into(), + linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::Yes), + linker: Some("rust-lld".into()), + + // There are many CPUs, one for each hardware generation. + // Require to set one explicitly as there is no good default. + need_explicit_cpu: true, + + max_atomic_width: Some(64), + + // Unwinding on GPUs is not useful. + panic_strategy: PanicStrategy::Abort, + + // amdgpu backend does not support libcalls. + no_builtins: true, + simd_types_indirect: false, + + // Allow `cdylib` crate type. + dynamic_linking: true, + only_cdylib: true, + executables: false, + dll_prefix: "".into(), + dll_suffix: ".elf".into(), + + // The LLVM backend does not support stack canaries for this target + supports_stack_protector: false, + + // Force LTO, object linking does not yet work with amdgpu. + requires_lto: true, + + ..Default::default() + }, + } +} diff --git a/config.example.toml b/config.example.toml index 04e7310e6bc34..7f6bbf2799288 100644 --- a/config.example.toml +++ b/config.example.toml @@ -108,7 +108,7 @@ # the resulting rustc being unable to compile for the disabled architectures. # # To add support for new targets, see https://rustc-dev-guide.rust-lang.org/building/new-target.html. -#targets = "AArch64;ARM;BPF;Hexagon;LoongArch;MSP430;Mips;NVPTX;PowerPC;RISCV;Sparc;SystemZ;WebAssembly;X86" +#targets = "AArch64;AMDGPU;ARM;BPF;Hexagon;LoongArch;MSP430;Mips;NVPTX;PowerPC;RISCV;Sparc;SystemZ;WebAssembly;X86" # LLVM experimental targets to build support for. These targets are specified in # the same format as above, but since these targets are experimental, they are diff --git a/src/bootstrap/download-ci-llvm-stamp b/src/bootstrap/download-ci-llvm-stamp index 42cecbf5df9bb..d2c0d380fb40b 100644 --- a/src/bootstrap/download-ci-llvm-stamp +++ b/src/bootstrap/download-ci-llvm-stamp @@ -1,4 +1,4 @@ Change this file to make users of the `download-ci-llvm` configuration download a new version of LLVM from CI, even if the LLVM submodule hasn’t changed. -Last change is for: https://github.com/rust-lang/rust/pull/129788 +Last change is for: https://github.com/rust-lang/rust/pull/134740 diff --git a/src/bootstrap/src/core/build_steps/llvm.rs b/src/bootstrap/src/core/build_steps/llvm.rs index 3cf25373b8963..f855be5a33d64 100644 --- a/src/bootstrap/src/core/build_steps/llvm.rs +++ b/src/bootstrap/src/core/build_steps/llvm.rs @@ -331,7 +331,7 @@ impl Step for Llvm { let llvm_targets = match &builder.config.llvm_targets { Some(s) => s, None => { - "AArch64;ARM;BPF;Hexagon;LoongArch;MSP430;Mips;NVPTX;PowerPC;RISCV;\ + "AArch64;AMDGPU;ARM;BPF;Hexagon;LoongArch;MSP430;Mips;NVPTX;PowerPC;RISCV;\ Sparc;SystemZ;WebAssembly;X86" } }; diff --git a/src/doc/rustc/src/SUMMARY.md b/src/doc/rustc/src/SUMMARY.md index 670e4bd1be68b..f78d3d4aee830 100644 --- a/src/doc/rustc/src/SUMMARY.md +++ b/src/doc/rustc/src/SUMMARY.md @@ -29,6 +29,7 @@ - [\*-apple-watchos](platform-support/apple-watchos.md) - [\*-apple-visionos](platform-support/apple-visionos.md) - [aarch64-nintendo-switch-freestanding](platform-support/aarch64-nintendo-switch-freestanding.md) + - [amdgcn-amd-amdhsa](platform-support/amdgcn-amd-amdhsa.md) - [armeb-unknown-linux-gnueabi](platform-support/armeb-unknown-linux-gnueabi.md) - [arm-none-eabi](platform-support/arm-none-eabi.md) - [armv4t-none-eabi](platform-support/armv4t-none-eabi.md) diff --git a/src/doc/rustc/src/platform-support.md b/src/doc/rustc/src/platform-support.md index 8227dfa043e3a..01ac9f5458644 100644 --- a/src/doc/rustc/src/platform-support.md +++ b/src/doc/rustc/src/platform-support.md @@ -272,6 +272,7 @@ target | std | host | notes `aarch64_be-unknown-linux-gnu` | ✓ | ✓ | ARM64 Linux (big-endian) `aarch64_be-unknown-linux-gnu_ilp32` | ✓ | ✓ | ARM64 Linux (big-endian, ILP32 ABI) [`aarch64_be-unknown-netbsd`](platform-support/netbsd.md) | ✓ | ✓ | ARM64 NetBSD (big-endian) +[`amdgcn-amd-amdhsa`](platform-support/amdgcn-amd-amdhsa.md) | * | | `-Ctarget-cpu=gfx...` to specify [the AMD GPU] to compile for [`arm64_32-apple-watchos`](platform-support/apple-watchos.md) | ✓ | | Arm Apple WatchOS 64-bit with 32-bit pointers [`arm64e-apple-darwin`](platform-support/arm64e-apple-darwin.md) | ✓ | ✓ | ARM64e Apple Darwin [`arm64e-apple-ios`](platform-support/arm64e-apple-ios.md) | ✓ | | ARM64e Apple iOS @@ -432,3 +433,4 @@ target | std | host | notes [`xtensa-esp32s3-none-elf`](platform-support/xtensa.md) | * | | Xtensa ESP32-S3 [runs on NVIDIA GPUs]: https://github.com/japaric-archived/nvptx#targets +[the AMD GPU]: https://llvm.org/docs/AMDGPUUsage.html#processors diff --git a/src/doc/rustc/src/platform-support/amdgcn-amd-amdhsa.md b/src/doc/rustc/src/platform-support/amdgcn-amd-amdhsa.md new file mode 100644 index 0000000000000..0b2f798e66de1 --- /dev/null +++ b/src/doc/rustc/src/platform-support/amdgcn-amd-amdhsa.md @@ -0,0 +1,111 @@ +# `amdgcn-amd-amdhsa` + +**Tier: 3** + +AMD GPU target for compute/HSA (Heterogeneous System Architecture). + +## Target maintainers + +- [@Flakebi](https://github.com/Flakebi) + +## Requirements + +AMD GPUs can be targeted via cross-compilation. +Supported GPUs depend on the LLVM version that is used by Rust. +In general, most GPUs starting from gfx7 (Sea Islands/CI) are supported as compilation targets, though older GPUs are not supported by the latest host runtime. +Details about supported GPUs can be found in [LLVM’s documentation] and [ROCm documentation]. + +Binaries can be loaded by [HIP] or by the HSA runtime implemented in [ROCR-Runtime]. +The format of binaries is a linked ELF. + +Binaries must be built with no-std. +They can use `core` and `alloc` (`alloc` only if an allocator is supplied). +At least one function needs to use the `"gpu-kernel"` calling convention and should be marked with `no_mangle` for simplicity. +Functions using the `"gpu-kernel"` calling convention are kernel entrypoints and can be used from the host runtime. + +## Building the target + +The target is included in rustc. + +## Building Rust programs + +The amdgpu target supports many hardware generations, which need different binaries. +The generations are exposed as different target-cpus in the backend. +As there are many, Rust does not ship pre-compiled libraries for this target. +Therefore, you have to build your own copy of `core` by using `cargo -Zbuild-std=core` or similar. + +To build a binary, create a no-std library: +```rust,ignore (platform-specific) +// src/lib.rs +#![feature(abi_gpu_kernel)] +#![no_std] + +#[panic_handler] +fn panic(_: &core::panic::PanicInfo) -> ! { + loop {} +} + +#[no_mangle] +pub extern "gpu-kernel" fn kernel(/* Arguments */) { + // Code +} +``` + +Build the library as `cdylib`: +```toml +# Cargo.toml +[lib] +crate-type = ["cdylib"] + +[profile.dev] +lto = true # LTO must be explicitly enabled for now +[profile.release] +lto = true +``` + +The target-cpu must be from the list [supported by LLVM] (or printed with `rustc --target amdgcn-amd-amdhsa --print target-cpus`). +The GPU version on the current system can be found e.g. with [`rocminfo`]. + +Example `.cargo/config.toml` file to set the target and GPU generation: +```toml +# .cargo/config.toml +[build] +target = "amdgcn-amd-amdhsa" +rustflags = ["-Ctarget-cpu=gfx1100"] + +[unstable] +build-std = ["core"] # Optional: "alloc" +``` + +## Running Rust programs + +To run a binary on an AMD GPU, a host runtime is needed. +On Linux and Windows, [HIP] can be used to load and run binaries. +Example code on how to load a compiled binary and run it is available in [ROCm examples]. + +On Linux, binaries can also run through the HSA runtime as implemented in [ROCR-Runtime]. + + + + + +## Additional information + +More information can be found on the [LLVM page for amdgpu]. + +[LLVM’s documentation]: https://llvm.org/docs/AMDGPUUsage.html#processors +[ROCm documentation]: https://rocmdocs.amd.com +[HIP]: https://rocm.docs.amd.com/projects/HIP/ +[ROCR-Runtime]: https://github.com/ROCm/ROCR-Runtime +[supported by LLVM]: https://llvm.org/docs/AMDGPUUsage.html#processors +[LLVM page for amdgpu]: https://llvm.org/docs/AMDGPUUsage.html +[`rocminfo`]: https://github.com/ROCm/rocminfo +[ROCm examples]: https://github.com/ROCm/rocm-examples/tree/ca8ef5b6f1390176616cd1c18fbc98785cbc73f6/HIP-Basic/module_api diff --git a/src/tools/build-manifest/src/main.rs b/src/tools/build-manifest/src/main.rs index feec2a7444f87..835a7d8e80fad 100644 --- a/src/tools/build-manifest/src/main.rs +++ b/src/tools/build-manifest/src/main.rs @@ -67,6 +67,7 @@ static TARGETS: &[&str] = &[ "aarch64-unknown-none-softfloat", "aarch64-unknown-redox", "aarch64-unknown-uefi", + "amdgcn-amd-amdhsa", "arm64e-apple-darwin", "arm64e-apple-ios", "arm64e-apple-tvos", diff --git a/tests/assembly/targets/targets-amdgpu.rs b/tests/assembly/targets/targets-amdgpu.rs new file mode 100644 index 0000000000000..501eed2e24783 --- /dev/null +++ b/tests/assembly/targets/targets-amdgpu.rs @@ -0,0 +1,21 @@ +//@ assembly-output: emit-asm +// ignore-tidy-linelength +//@ revisions: amdgcn_amd_amdhsa +//@ [amdgcn_amd_amdhsa] compile-flags: --target amdgcn-amd-amdhsa -Ctarget-cpu=gfx900 +//@ [amdgcn_amd_amdhsa] needs-llvm-components: amdgpu + +// Sanity-check that each target can produce assembly code. + +#![feature(no_core, lang_items)] +#![no_std] +#![no_core] +#![crate_type = "lib"] + +#[lang = "sized"] +trait Sized {} + +pub fn test() -> u8 { + 42 +} + +// CHECK: .version diff --git a/tests/ui/amdgpu-require-explicit-cpu.nocpu.stderr b/tests/ui/amdgpu-require-explicit-cpu.nocpu.stderr new file mode 100644 index 0000000000000..7480a8ed38f15 --- /dev/null +++ b/tests/ui/amdgpu-require-explicit-cpu.nocpu.stderr @@ -0,0 +1,4 @@ +error: target requires explicitly specifying a cpu with `-C target-cpu` + +error: aborting due to 1 previous error + diff --git a/tests/ui/amdgpu-require-explicit-cpu.rs b/tests/ui/amdgpu-require-explicit-cpu.rs new file mode 100644 index 0000000000000..46778a1094fab --- /dev/null +++ b/tests/ui/amdgpu-require-explicit-cpu.rs @@ -0,0 +1,17 @@ +//@ revisions: nocpu cpu +//@ no-prefer-dynamic +//@ compile-flags: --crate-type=cdylib --target=amdgcn-amd-amdhsa +//@ needs-llvm-components: amdgpu +//@ needs-rust-lld +//@[nocpu] error-pattern: target requires explicitly specifying a cpu +//@[nocpu] build-fail +//@[cpu] compile-flags: -Ctarget-cpu=gfx900 +//@[cpu] build-pass + +#![feature(no_core, lang_items)] +#![no_core] + +#[lang="sized"] +trait Sized {} + +pub fn foo() {} diff --git a/tests/ui/check-cfg/exhaustive-names-values.empty_cfg.stderr b/tests/ui/check-cfg/exhaustive-names-values.empty_cfg.stderr index 7e77ba63a127f..e7b8f35505761 100644 --- a/tests/ui/check-cfg/exhaustive-names-values.empty_cfg.stderr +++ b/tests/ui/check-cfg/exhaustive-names-values.empty_cfg.stderr @@ -14,7 +14,7 @@ warning: unexpected `cfg` condition value: `value` LL | #[cfg(target_vendor = "value")] | ^^^^^^^^^^^^^^^^^^^^^^^ | - = note: expected values for `target_vendor` are: `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs` + = note: expected values for `target_vendor` are: `amd`, `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs` = note: see for more information about checking conditional configuration warning: unexpected `cfg` condition name: `feature` diff --git a/tests/ui/check-cfg/exhaustive-names-values.feature.stderr b/tests/ui/check-cfg/exhaustive-names-values.feature.stderr index 10302f0a7e46a..93b5414cc3f2c 100644 --- a/tests/ui/check-cfg/exhaustive-names-values.feature.stderr +++ b/tests/ui/check-cfg/exhaustive-names-values.feature.stderr @@ -15,7 +15,7 @@ warning: unexpected `cfg` condition value: `value` LL | #[cfg(target_vendor = "value")] | ^^^^^^^^^^^^^^^^^^^^^^^ | - = note: expected values for `target_vendor` are: `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs` + = note: expected values for `target_vendor` are: `amd`, `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs` = note: see for more information about checking conditional configuration warning: unexpected `cfg` condition value: `unk` diff --git a/tests/ui/check-cfg/exhaustive-names-values.full.stderr b/tests/ui/check-cfg/exhaustive-names-values.full.stderr index 10302f0a7e46a..93b5414cc3f2c 100644 --- a/tests/ui/check-cfg/exhaustive-names-values.full.stderr +++ b/tests/ui/check-cfg/exhaustive-names-values.full.stderr @@ -15,7 +15,7 @@ warning: unexpected `cfg` condition value: `value` LL | #[cfg(target_vendor = "value")] | ^^^^^^^^^^^^^^^^^^^^^^^ | - = note: expected values for `target_vendor` are: `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs` + = note: expected values for `target_vendor` are: `amd`, `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs` = note: see for more information about checking conditional configuration warning: unexpected `cfg` condition value: `unk` diff --git a/tests/ui/check-cfg/well-known-values.stderr b/tests/ui/check-cfg/well-known-values.stderr index ffebd7e553198..6421cb8f2c2e7 100644 --- a/tests/ui/check-cfg/well-known-values.stderr +++ b/tests/ui/check-cfg/well-known-values.stderr @@ -138,7 +138,7 @@ warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE` LL | target_arch = "_UNEXPECTED_VALUE", | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | - = note: expected values for `target_arch` are: `aarch64`, `arm`, `arm64ec`, `avr`, `bpf`, `csky`, `hexagon`, `loongarch64`, `m68k`, `mips`, `mips32r6`, `mips64`, `mips64r6`, `msp430`, `nvptx64`, `powerpc`, `powerpc64`, `riscv32`, `riscv64`, `s390x`, `sparc`, `sparc64`, `wasm32`, `wasm64`, `x86`, `x86_64`, and `xtensa` + = note: expected values for `target_arch` are: `aarch64`, `amdgpu`, `arm`, `arm64ec`, `avr`, `bpf`, `csky`, `hexagon`, `loongarch64`, `m68k`, `mips`, `mips32r6`, `mips64`, `mips64r6`, `msp430`, `nvptx64`, `powerpc`, `powerpc64`, `riscv32`, `riscv64`, `s390x`, `sparc`, `sparc64`, `wasm32`, `wasm64`, `x86`, `x86_64`, and `xtensa` = note: see for more information about checking conditional configuration warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE` @@ -201,7 +201,7 @@ warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE` LL | target_os = "_UNEXPECTED_VALUE", | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | - = note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`, and `zkvm` + = note: expected values for `target_os` are: `aix`, `amdhsa`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`, and `zkvm` = note: see for more information about checking conditional configuration warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE` @@ -230,7 +230,7 @@ warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE` LL | target_vendor = "_UNEXPECTED_VALUE", | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | - = note: expected values for `target_vendor` are: `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs` + = note: expected values for `target_vendor` are: `amd`, `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs` = note: see for more information about checking conditional configuration warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE` @@ -274,7 +274,7 @@ LL | #[cfg(target_os = "linuz")] // testing that we suggest `linux` | | | help: there is a expected value with a similar name: `"linux"` | - = note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`, and `zkvm` + = note: expected values for `target_os` are: `aix`, `amdhsa`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`, and `zkvm` = note: see for more information about checking conditional configuration warning: 28 warnings emitted