Auto merge of rust-lang#132664 - matthiaskrgr:rollup-i27nr7i, r=matth…

…iaskrgr

Rollup of 5 pull requests

Successful merges:

 - rust-lang#131261 (Stabilize `UnsafeCell::from_mut`)
 - rust-lang#131405 (bootstrap/codegen_ssa: ship llvm-strip and use it for -Cstrip)
 - rust-lang#132077 (Add a new `wide-arithmetic` feature for WebAssembly)
 - rust-lang#132562 (Remove the `wasm32-wasi` target from rustc)
 - rust-lang#132660 (Remove unused errs.rs file)

Failed merges:

 - rust-lang#131721 (Add new unstable feature `const_eq_ignore_ascii_case`)

r? `@ghost`
`@rustbot` modify labels: rollup

compiler/rustc_codegen_llvm/src/llvm_util.rs

@@ -277,6 +277,9 @@ pub(crate) fn to_llvm_features<'a>(sess: &Session, s: &'a str) -> Option<LLVMFea
         ("x86", s) if s.starts_with("avx512") => {
             Some(LLVMFeature::with_dependency(s, TargetFeatureFoldStrength::EnableOnly("evex512")))
         }
+        // Support for `wide-arithmetic` will first land in LLVM 20 as part of
+        // llvm/llvm-project#111598
+        ("wasm32" | "wasm64", "wide-arithmetic") if get_version() < (20, 0, 0) => None,
         (_, s) => Some(LLVMFeature::new(s)),
     }
 }

compiler/rustc_codegen_ssa/messages.ftl

@@ -2,6 +2,8 @@ codegen_ssa_L4Bender_exporting_symbols_unimplemented = exporting symbols not imp
 
 codegen_ssa_add_native_library = failed to add native library {$library_path}: {$error}
 
+codegen_ssa_aix_strip_not_used = using host's `strip` binary to cross-compile to AIX which is not guaranteed to work
+
 codegen_ssa_apple_deployment_target_invalid =
     failed to parse deployment target specified in {$env_var}: {$error}
 

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -1085,9 +1085,7 @@ fn link_natively(
     let strip = sess.opts.cg.strip;
 
     if sess.target.is_like_osx {
-        // Use system `strip` when running on host macOS.
-        // <https://github.com/rust-lang/rust/pull/130781>
-        let stripcmd = if cfg!(target_os = "macos") { "/usr/bin/strip" } else { "strip" };
+        let stripcmd = "rust-objcopy";
         match (strip, crate_type) {
             (Strip::Debuginfo, _) => {
                 strip_symbols_with_external_utility(sess, stripcmd, out_filename, Some("-S"))
@@ -1103,11 +1101,14 @@ fn link_natively(
         }
     }
 
-    if sess.target.os == "illumos" {
+    if sess.target.is_like_solaris {
         // Many illumos systems will have both the native 'strip' utility and
         // the GNU one. Use the native version explicitly and do not rely on
         // what's in the path.
-        let stripcmd = "/usr/bin/strip";
+        //
+        // If cross-compiling and there is not a native version, then use
+        // `llvm-strip` and hope.
+        let stripcmd = if !sess.host.is_like_solaris { "rust-objcopy" } else { "/usr/bin/strip" };
         match strip {
             // Always preserve the symbol table (-x).
             Strip::Debuginfo => {
@@ -1120,6 +1121,10 @@ fn link_natively(
     }
 
     if sess.target.is_like_aix {
+        // `llvm-strip` doesn't work for AIX - their strip must be used.
+        if !sess.host.is_like_aix {
+            sess.dcx().emit_warn(errors::AixStripNotUsed);
+        }
         let stripcmd = "/usr/bin/strip";
         match strip {
             Strip::Debuginfo => {
@@ -1147,6 +1152,13 @@ fn strip_symbols_with_external_utility(
     if let Some(option) = option {
         cmd.arg(option);
     }
+
+    let mut new_path = sess.get_tools_search_paths(false);
+    if let Some(path) = env::var_os("PATH") {
+        new_path.extend(env::split_paths(&path));
+    }
+    cmd.env("PATH", env::join_paths(new_path).unwrap());
+
     let prog = cmd.arg(out_filename).output();
     match prog {
         Ok(prog) => {

compiler/rustc_codegen_ssa/src/errors.rs

@@ -1110,3 +1110,7 @@ impl<G: EmissionGuarantee> Diagnostic<'_, G> for TargetFeatureDisableOrEnable<'_
         diag
     }
 }
+
+#[derive(Diagnostic)]
+#[diag(codegen_ssa_aix_strip_not_used)]
+pub(crate) struct AixStripNotUsed;

compiler/rustc_session/src/config.rs

@@ -1351,19 +1351,6 @@ pub fn build_target_config(early_dcx: &EarlyDiagCtxt, opts: &Options, sysroot: &
                 early_dcx.early_warn(warning)
             }
 
-            // The `wasm32-wasi` target is being renamed to `wasm32-wasip1` as
-            // part of rust-lang/compiler-team#607 and
-            // rust-lang/compiler-team#695. Warn unconditionally on usage to
-            // raise awareness of the renaming. This code will be deleted in
-            // October 2024.
-            if opts.target_triple.tuple() == "wasm32-wasi" {
-                early_dcx.early_warn(
-                    "the `wasm32-wasi` target is being renamed to \
-                    `wasm32-wasip1` and the `wasm32-wasi` target will be \
-                    removed from nightly in October 2024 and removed from \
-                    stable Rust in January 2025",
-                )
-            }
             if !matches!(target.pointer_width, 16 | 32 | 64) {
                 early_dcx.early_fatal(format!(
                     "target specification was invalid: unrecognized target-pointer-width {}",

compiler/rustc_target/src/spec/mod.rs

@@ -1805,7 +1805,6 @@ supported_targets! {
     ("wasm32-unknown-emscripten", wasm32_unknown_emscripten),
     ("wasm32-unknown-unknown", wasm32_unknown_unknown),
     ("wasm32v1-none", wasm32v1_none),
-    ("wasm32-wasi", wasm32_wasi),
     ("wasm32-wasip1", wasm32_wasip1),
     ("wasm32-wasip2", wasm32_wasip2),
     ("wasm32-wasip1-threads", wasm32_wasip1_threads),

compiler/rustc_target/src/spec/targets/wasm32_wasip1.rs

@@ -17,7 +17,7 @@ pub(crate) fn target() -> Target {
 
     options.os = "wasi".into();
     options.env = "p1".into();
-    options.add_pre_link_args(LinkerFlavor::WasmLld(Cc::Yes), &["--target=wasm32-wasi"]);
+    options.add_pre_link_args(LinkerFlavor::WasmLld(Cc::Yes), &["--target=wasm32-wasip1"]);
 
     options.pre_link_objects_self_contained = crt_objects::pre_wasi_self_contained();
     options.post_link_objects_self_contained = crt_objects::post_wasi_self_contained();
@@ -47,7 +47,7 @@ pub(crate) fn target() -> Target {
     options.entry_name = "__main_void".into();
 
     Target {
-        llvm_target: "wasm32-wasi".into(),
+        llvm_target: "wasm32-wasip1".into(),
         metadata: crate::spec::TargetMetadata {
             description: Some("WebAssembly with WASI".into()),
             tier: Some(2),

compiler/rustc_target/src/spec/targets/wasm32_wasip2.rs

@@ -1,5 +1,5 @@
 //! The `wasm32-wasip2` target is the next evolution of the
-//! wasm32-wasi target. While the wasi specification is still under
+//! wasm32-wasip1 target. While the wasi specification is still under
 //! active development, the preview 2 iteration is considered an "island
 //! of stability" that should allow users to rely on it indefinitely.
 //!

compiler/rustc_target/src/target_features.rs

@@ -470,6 +470,7 @@ const WASM_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
     ("relaxed-simd", Stable, &["simd128"]),
     ("sign-ext", Stable, &[]),
     ("simd128", Stable, &[]),
+    ("wide-arithmetic", Unstable(sym::wasm_target_feature), &[]),
     // tidy-alphabetical-end
 ];
 

library/core/src/cell.rs

@@ -2122,7 +2122,6 @@ impl<T: ?Sized> UnsafeCell<T> {
     /// # Examples
     ///
     /// ```
-    /// # #![feature(unsafe_cell_from_mut)]
     /// use std::cell::UnsafeCell;
     ///
     /// let mut val = 42;
@@ -2132,7 +2131,9 @@ impl<T: ?Sized> UnsafeCell<T> {
     /// assert_eq!(*uc.get_mut(), 41);
     /// ```
     #[inline(always)]
-    #[unstable(feature = "unsafe_cell_from_mut", issue = "111645")]
+    #[stable(feature = "unsafe_cell_from_mut", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "unsafe_cell_from_mut", since = "CURRENT_RUSTC_VERSION")]
+    #[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_mut_refs))]
     pub const fn from_mut(value: &mut T) -> &mut UnsafeCell<T> {
         // SAFETY: `UnsafeCell<T>` has the same memory layout as `T` due to #[repr(transparent)].
         unsafe { &mut *(value as *mut T as *mut UnsafeCell<T>) }

src/bootstrap/src/core/build_steps/compile.rs

@@ -219,8 +219,7 @@ impl Step for Std {
                 .join(compiler.host)
                 .join("bin");
             if src_sysroot_bin.exists() {
-                let target_sysroot_bin =
-                    builder.sysroot_target_libdir(compiler, target).parent().unwrap().join("bin");
+                let target_sysroot_bin = builder.sysroot_target_bindir(compiler, target);
                 t!(fs::create_dir_all(&target_sysroot_bin));
                 builder.cp_link_r(&src_sysroot_bin, &target_sysroot_bin);
             }
@@ -1977,6 +1976,14 @@ impl Step for Assemble {
             }
         }
 
+        {
+            // `llvm-strip` is used by rustc, which is actually just a symlink to `llvm-objcopy`,
+            // so copy and rename `llvm-objcopy`.
+            let src_exe = exe("llvm-objcopy", target_compiler.host);
+            let dst_exe = exe("rust-objcopy", target_compiler.host);
+            builder.copy_link(&libdir_bin.join(src_exe), &libdir_bin.join(dst_exe));
+        }
+
         // In addition to `rust-lld` also install `wasm-component-ld` when
         // LLD is enabled. This is a relatively small binary that primarily
         // delegates to the `rust-lld` binary for linking and then runs

src/bootstrap/src/core/build_steps/dist.rs

@@ -459,8 +459,7 @@ impl Step for Rustc {
 
             // Copy over lld if it's there
             if builder.config.lld_enabled {
-                let src_dir =
-                    builder.sysroot_target_libdir(compiler, host).parent().unwrap().join("bin");
+                let src_dir = builder.sysroot_target_bindir(compiler, host);
                 let rust_lld = exe("rust-lld", compiler.host);
                 builder.copy_link(&src_dir.join(&rust_lld), &dst_dir.join(&rust_lld));
                 let self_contained_lld_src_dir = src_dir.join("gcc-ld");
@@ -474,9 +473,16 @@ impl Step for Rustc {
                     );
                 }
             }
+
+            {
+                let src_dir = builder.sysroot_target_bindir(compiler, host);
+                let llvm_objcopy = exe("llvm-objcopy", compiler.host);
+                let rust_objcopy = exe("rust-objcopy", compiler.host);
+                builder.copy_link(&src_dir.join(&llvm_objcopy), &dst_dir.join(&rust_objcopy));
+            }
+
             if builder.tool_enabled("wasm-component-ld") {
-                let src_dir =
-                    builder.sysroot_target_libdir(compiler, host).parent().unwrap().join("bin");
+                let src_dir = builder.sysroot_target_bindir(compiler, host);
                 let ld = exe("wasm-component-ld", compiler.host);
                 builder.copy_link(&src_dir.join(&ld), &dst_dir.join(&ld));
             }

src/bootstrap/src/core/builder/mod.rs

@@ -1161,6 +1161,11 @@ impl<'a> Builder<'a> {
         self.ensure(compile::Sysroot::new(compiler))
     }
 
+    /// Returns the bindir for a compiler's sysroot.
+    pub fn sysroot_target_bindir(&self, compiler: Compiler, target: TargetSelection) -> PathBuf {
+        self.sysroot_target_libdir(compiler, target).parent().unwrap().join("bin")
+    }
+
     /// Returns the libdir where the standard library and other artifacts are
     /// found for a compiler's sysroot.
     pub fn sysroot_target_libdir(&self, compiler: Compiler, target: TargetSelection) -> PathBuf {

src/ci/docker/host-x86_64/dist-various-2/Dockerfile

@@ -114,7 +114,6 @@ ENV CARGO_TARGET_AARCH64_UNKNOWN_FUCHSIA_RUSTFLAGS \
 ENV TARGETS=x86_64-unknown-fuchsia
 ENV TARGETS=$TARGETS,aarch64-unknown-fuchsia
 ENV TARGETS=$TARGETS,wasm32-unknown-unknown
-ENV TARGETS=$TARGETS,wasm32-wasi
 ENV TARGETS=$TARGETS,wasm32-wasip1
 ENV TARGETS=$TARGETS,wasm32-wasip1-threads
 ENV TARGETS=$TARGETS,wasm32-wasip2

src/doc/rustc/src/platform-support.md

@@ -192,8 +192,8 @@ target | std | notes
 [`thumbv8m.main-none-eabihf`](platform-support/thumbv8m.main-none-eabi.md) | * | Bare Armv8-M Mainline, hardfloat
 [`wasm32-unknown-emscripten`](platform-support/wasm32-unknown-emscripten.md) | ✓ | WebAssembly via Emscripten
 [`wasm32-unknown-unknown`](platform-support/wasm32-unknown-unknown.md) | ✓ | WebAssembly
-`wasm32-wasi` | ✓ | WebAssembly with WASI (undergoing a [rename to `wasm32-wasip1`][wasi-rename])
-[`wasm32-wasip1`](platform-support/wasm32-wasip1.md) | ✓ | WebAssembly with WASI
+[`wasm32-wasip1`](platform-support/wasm32-wasip1.md) | ✓ | WebAssembly with WASIp1
+[`wasm32-wasip2`](platform-support/wasm32-wasip2.md) | ✓ | WebAssembly with WASIp2
 [`wasm32-wasip1-threads`](platform-support/wasm32-wasip1-threads.md) | ✓ | WebAssembly with WASI Preview 1 and threads
 [`wasm32v1-none`](platform-support/wasm32v1-none.md) | * | WebAssembly limited to 1.0 features and no imports
 [`x86_64-apple-ios`](platform-support/apple-ios.md) | ✓ | 64-bit x86 iOS
@@ -377,7 +377,6 @@ target | std | host | notes
 `thumbv7a-pc-windows-msvc` | ✓ |  |
 `thumbv7a-uwp-windows-msvc` | ✓ |  |
 `thumbv7neon-unknown-linux-musleabihf` | ? |  | Thumb2-mode Armv7-A Linux with NEON, musl 1.2.3
-[`wasm32-wasip2`](platform-support/wasm32-wasip2.md) | ✓ |  | WebAssembly
 [`wasm64-unknown-unknown`](platform-support/wasm64-unknown-unknown.md) | ? |  | WebAssembly
 [`x86_64-apple-tvos`](platform-support/apple-tvos.md) | ✓ |  | x86 64-bit tvOS
 [`x86_64-apple-watchos-sim`](platform-support/apple-watchos.md) | ✓ |  | x86 64-bit Apple WatchOS simulator

src/doc/rustc/src/platform-support/wasm32-wasip1.md

@@ -98,10 +98,6 @@ the target with:
 rustup target add wasm32-wasip1
 ```
 
-> **Note**: the `wasm32-wasip1` target is new and may only be available
-> on nightly by the time you're reading this. If `wasm32-wasip1` isn't
-> available on stable Rust then `wasm32-wasi` should be available instead.
-
 Rust programs can be built for that target:
 
 ```text

src/doc/unstable-book/src/compiler-flags/wasm-c-abi.md

@@ -4,7 +4,7 @@ This option controls whether Rust uses the spec-compliant C ABI when compiling
 for the `wasm32-unknown-unknown` target.
 
 This makes it possible to be ABI-compatible with all other spec-compliant Wasm
-like Rusts `wasm32-wasi`.
+like Rusts `wasm32-wasip1`.
 
 This compiler flag is perma-unstable, as it will be enabled by default in the
 future with no option to fall back to the old non-spec-compliant ABI.

src/tools/build-manifest/src/main.rs

@@ -157,7 +157,6 @@ static TARGETS: &[&str] = &[
     "thumbv8m.main-none-eabihf",
     "wasm32-unknown-emscripten",
     "wasm32-unknown-unknown",
-    "wasm32-wasi",
     "wasm32-wasip1",
     "wasm32-wasip1-threads",
     "wasm32-wasip2",

src/tools/compiletest/src/header/tests.rs

@@ -583,10 +583,6 @@ fn wasm_special() {
         ("wasm32-unknown-emscripten", "emscripten", true),
         ("wasm32-unknown-emscripten", "wasm32", true),
         ("wasm32-unknown-emscripten", "wasm32-bare", false),
-        ("wasm32-wasi", "emscripten", false),
-        ("wasm32-wasi", "wasm32", true),
-        ("wasm32-wasi", "wasm32-bare", false),
-        ("wasm32-wasi", "wasi", true),
         ("wasm32-wasip1", "emscripten", false),
         ("wasm32-wasip1", "wasm32", true),
         ("wasm32-wasip1", "wasm32-bare", false),