Rollup merge of rust-lang#94019 - hermitcore:target, r=Mark-Simulacrum

removing architecture requirements for RustyHermit

RustHermit and HermitCore is able to run on aarch64 and x86_64. In the future these operating systems will also support RISC-V. Consequently, the dependency to a specific target should be removed.

The build process of `hermit-abi` fails if the architecture isn't supported.

Cargo.lock

@@ -154,7 +154,7 @@ version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.1.19",
  "libc",
  "winapi",
 ]
@@ -1610,6 +1610,15 @@ name = "hermit-abi"
 version = "0.1.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "hermit-abi"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ab7905ea95c6d9af62940f9d7dd9596d54c334ae2c15300c482051292d5637f"
 dependencies = [
  "compiler_builtins",
  "libc",
@@ -2396,7 +2405,7 @@ version = "1.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "19e64526ebdee182341572e50e9ad03965aa510cd94427a4549448f285e957a1"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.1.19",
  "libc",
 ]
 
@@ -4782,7 +4791,7 @@ dependencies = [
  "dlmalloc",
  "fortanix-sgx-abi",
  "hashbrown 0.12.0",
- "hermit-abi",
+ "hermit-abi 0.2.0",
  "libc",
  "miniz_oxide",
  "object 0.26.2",

library/std/Cargo.toml

@@ -41,8 +41,8 @@ dlmalloc = { version = "0.2.3", features = ['rustc-dep-of-std'] }
 [target.x86_64-fortanix-unknown-sgx.dependencies]
 fortanix-sgx-abi = { version = "0.3.2", features = ['rustc-dep-of-std'] }
 
-[target.'cfg(all(any(target_arch = "x86_64", target_arch = "aarch64"), target_os = "hermit"))'.dependencies]
-hermit-abi = { version = "0.1.19", features = ['rustc-dep-of-std'] }
+[target.'cfg(target_os = "hermit")'.dependencies]
+hermit-abi = { version = "0.2.0", features = ['rustc-dep-of-std'] }
 
 [target.wasm32-wasi.dependencies]
 wasi = { version = "0.11.0", features = ['rustc-dep-of-std'], default-features = false }

library/std/src/sys/hermit/fd.rs

@@ -1,6 +1,6 @@
 #![unstable(reason = "not public", issue = "none", feature = "fd")]
 
-use crate::io::{self, Read, ReadBuf};
+use crate::io::{self, Read};
 use crate::mem;
 use crate::sys::cvt;
 use crate::sys::hermit::abi;