Auto merge of rust-lang#153519 - JonathanBrouwer:rollup-Soq8THm, r=JonathanBrouwer

Rollup of 5 pull requests

Successful merges:

 - rust-lang#149937 (spliit out `linker-info` from `linker-messages`)
 - rust-lang#153503 (Fallback to fat LTO for -Clto=thin in cg_gcc)
 - rust-lang#153346 (move never type tests to subdirectories and add some comments)
 - rust-lang#153371 (Fix LegacyKeyValueFormat report from docker build: arm)
 - rust-lang#153508 (Clean up the eager formatting API)

Author: bors

compiler/rustc_borrowck/src/diagnostics/mod.rs

@@ -4,6 +4,7 @@ use std::collections::BTreeMap;
 
 use rustc_abi::{FieldIdx, VariantIdx};
 use rustc_data_structures::fx::FxIndexMap;
+use rustc_errors::formatting::DiagMessageAddArg;
 use rustc_errors::{Applicability, Diag, DiagMessage, EmissionGuarantee, MultiSpan, listify, msg};
 use rustc_hir::def::{CtorKind, Namespace};
 use rustc_hir::{
@@ -1309,12 +1310,9 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
                         && !spans.is_empty()
                     {
                         let mut span: MultiSpan = spans.clone().into();
-                        err.arg("ty", param_ty.to_string());
-                        let msg = err.dcx.eagerly_format_to_string(
-                            msg!("`{$ty}` is made to be an `FnOnce` closure here"),
-                            err.args.iter(),
-                        );
-                        err.remove_arg("ty");
+                        let msg = msg!("`{$ty}` is made to be an `FnOnce` closure here")
+                            .arg("ty", param_ty.to_string())
+                            .format();
                         for sp in spans {
                             span.push_span_label(sp, msg.clone());
                         }

compiler/rustc_builtin_macros/src/errors.rs

@@ -1,4 +1,5 @@
 use rustc_errors::codes::*;
+use rustc_errors::formatting::DiagMessageAddArg;
 use rustc_errors::{
     Diag, DiagCtxtHandle, Diagnostic, EmissionGuarantee, Level, MultiSpan, SingleLabelManySpans,
     Subdiagnostic, msg,
@@ -763,15 +764,17 @@ pub(crate) struct FormatUnusedArg {
 // form of diagnostic.
 impl Subdiagnostic for FormatUnusedArg {
     fn add_to_diag<G: EmissionGuarantee>(self, diag: &mut Diag<'_, G>) {
-        diag.arg("named", self.named);
-        let msg = diag.eagerly_format(msg!(
-            "{$named ->
-                [true] named argument
-                *[false] argument
-            } never used"
-        ));
-        diag.remove_arg("named");
-        diag.span_label(self.span, msg);
+        diag.span_label(
+            self.span,
+            msg!(
+                "{$named ->
+                    [true] named argument
+                    *[false] argument
+                } never used"
+            )
+            .arg("named", self.named)
+            .format(),
+        );
     }
 }
 
@@ -946,17 +949,14 @@ pub(crate) struct AsmClobberNoReg {
 
 impl<'a, G: EmissionGuarantee> Diagnostic<'a, G> for AsmClobberNoReg {
     fn into_diag(self, dcx: DiagCtxtHandle<'a>, level: Level) -> Diag<'a, G> {
-        // eager translation as `span_labels` takes `AsRef<str>`
-        let lbl1 = dcx.eagerly_format_to_string(msg!("clobber_abi"), [].into_iter());
-        let lbl2 = dcx.eagerly_format_to_string(msg!("generic outputs"), [].into_iter());
         Diag::new(
             dcx,
             level,
             msg!("asm with `clobber_abi` must specify explicit registers for outputs"),
         )
         .with_span(self.spans.clone())
-        .with_span_labels(self.clobbers, &lbl1)
-        .with_span_labels(self.spans, &lbl2)
+        .with_span_labels(self.clobbers, "clobber_abi")
+        .with_span_labels(self.spans, "generic outputs")
     }
 }
 

compiler/rustc_codegen_llvm/src/errors.rs

@@ -2,7 +2,9 @@ use std::ffi::CString;
 use std::path::Path;
 
 use rustc_data_structures::small_c_str::SmallCStr;
-use rustc_errors::{Diag, DiagCtxtHandle, Diagnostic, EmissionGuarantee, Level, msg};
+use rustc_errors::{
+    Diag, DiagCtxtHandle, Diagnostic, EmissionGuarantee, Level, format_diag_message, msg,
+};
 use rustc_macros::Diagnostic;
 use rustc_span::Span;
 
@@ -24,7 +26,7 @@ impl<G: EmissionGuarantee> Diagnostic<'_, G> for ParseTargetMachineConfig<'_> {
     fn into_diag(self, dcx: DiagCtxtHandle<'_>, level: Level) -> Diag<'_, G> {
         let diag: Diag<'_, G> = self.0.into_diag(dcx, level);
         let (message, _) = diag.messages.first().expect("`LlvmError` with no message");
-        let message = dcx.eagerly_format_to_string(message.clone(), diag.args.iter());
+        let message = format_diag_message(message, &diag.args);
         Diag::new(
             dcx,
             level,

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -22,6 +22,7 @@ use rustc_errors::DiagCtxtHandle;
 use rustc_fs_util::{TempDirBuilder, fix_windows_verbatim_for_gcc, try_canonicalize};
 use rustc_hir::attrs::NativeLibKind;
 use rustc_hir::def_id::{CrateNum, LOCAL_CRATE};
+use rustc_lint_defs::builtin::LINKER_INFO;
 use rustc_macros::Diagnostic;
 use rustc_metadata::fs::{METADATA_FILENAME, copy_to_stdout, emit_wrapper_file};
 use rustc_metadata::{
@@ -60,7 +61,8 @@ use super::rpath::{self, RPathConfig};
 use super::{apple, versioned_llvm_target};
 use crate::base::needs_allocator_shim_for_linking;
 use crate::{
-    CompiledModule, CompiledModules, CrateInfo, NativeLib, errors, looks_like_rust_object_file,
+    CodegenLintLevels, CompiledModule, CompiledModules, CrateInfo, NativeLib, errors,
+    looks_like_rust_object_file,
 };
 
 pub fn ensure_removed(dcx: DiagCtxtHandle<'_>, path: &Path) {
@@ -672,6 +674,147 @@ struct LinkerOutput {
     inner: String,
 }
 
+fn is_msvc_link_exe(sess: &Session) -> bool {
+    let (linker_path, flavor) = linker_and_flavor(sess);
+    sess.target.is_like_msvc
+        && flavor == LinkerFlavor::Msvc(Lld::No)
+        // Match exactly "link.exe"
+        && linker_path.to_str() == Some("link.exe")
+}
+
+fn is_macos_ld(sess: &Session) -> bool {
+    let (_, flavor) = linker_and_flavor(sess);
+    sess.target.is_like_darwin && matches!(flavor, LinkerFlavor::Darwin(_, Lld::No))
+}
+
+fn is_windows_gnu_ld(sess: &Session) -> bool {
+    let (_, flavor) = linker_and_flavor(sess);
+    sess.target.is_like_windows
+        && !sess.target.is_like_msvc
+        && matches!(flavor, LinkerFlavor::Gnu(_, Lld::No))
+}
+
+fn report_linker_output(sess: &Session, levels: CodegenLintLevels, stdout: &[u8], stderr: &[u8]) {
+    let mut escaped_stderr = escape_string(&stderr);
+    let mut escaped_stdout = escape_string(&stdout);
+    let mut linker_info = String::new();
+
+    info!("linker stderr:\n{}", &escaped_stderr);
+    info!("linker stdout:\n{}", &escaped_stdout);
+
+    fn for_each(bytes: &[u8], mut f: impl FnMut(&str, &mut String)) -> String {
+        let mut output = String::new();
+        if let Ok(str) = str::from_utf8(bytes) {
+            info!("line: {str}");
+            output = String::with_capacity(str.len());
+            for line in str.lines() {
+                f(line.trim(), &mut output);
+            }
+        }
+        escape_string(output.trim().as_bytes())
+    }
+
+    if is_msvc_link_exe(sess) {
+        info!("inferred MSVC link.exe");
+
+        escaped_stdout = for_each(&stdout, |line, output| {
+            // Hide some progress messages from link.exe that we don't care about.
+            // See https://github.com/chromium/chromium/blob/bfa41e41145ffc85f041384280caf2949bb7bd72/build/toolchain/win/tool_wrapper.py#L144-L146
+            if line.starts_with("   Creating library")
+                || line.starts_with("Generating code")
+                || line.starts_with("Finished generating code")
+            {
+                linker_info += line;
+                linker_info += "\r\n";
+            } else {
+                *output += line;
+                *output += "\r\n"
+            }
+        });
+    } else if is_macos_ld(sess) {
+        info!("inferred macOS LD");
+
+        // FIXME: Tracked by https://github.com/rust-lang/rust/issues/136113
+        let deployment_mismatch = |line: &str| {
+            line.starts_with("ld: warning: object file (")
+                && line.contains("was built for newer 'macOS' version")
+                && line.contains("than being linked")
+        };
+        // FIXME: This is a real warning we would like to show, but it hits too many crates
+        // to want to turn it on immediately.
+        let search_path = |line: &str| {
+            line.starts_with("ld: warning: search path '") && line.ends_with("' not found")
+        };
+        escaped_stderr = for_each(&stderr, |line, output| {
+            // This duplicate library warning is just not helpful at all.
+            if line.starts_with("ld: warning: ignoring duplicate libraries: ")
+                || deployment_mismatch(line)
+                || search_path(line)
+            {
+                linker_info += line;
+                linker_info += "\n";
+            } else {
+                *output += line;
+                *output += "\n"
+            }
+        });
+    } else if is_windows_gnu_ld(sess) {
+        info!("inferred Windows GNU LD");
+
+        let mut saw_exclude_symbol = false;
+        // See https://github.com/rust-lang/rust/issues/112368.
+        // FIXME: maybe check that binutils is older than 2.40 before downgrading this warning?
+        let exclude_symbols = |line: &str| {
+            line.starts_with("Warning: .drectve `-exclude-symbols:")
+                && line.ends_with("' unrecognized")
+        };
+        escaped_stderr = for_each(&stderr, |line, output| {
+            if exclude_symbols(line) {
+                saw_exclude_symbol = true;
+                linker_info += line;
+                linker_info += "\n";
+            } else if saw_exclude_symbol && line == "Warning: corrupt .drectve at end of def file" {
+                linker_info += line;
+                linker_info += "\n";
+            } else {
+                *output += line;
+                *output += "\n"
+            }
+        });
+    }
+
+    let lint_msg = |msg| {
+        diag_lint_level(
+            sess,
+            LINKER_MESSAGES,
+            levels.linker_messages,
+            None,
+            LinkerOutput { inner: msg },
+        );
+    };
+    let lint_info = |msg| {
+        diag_lint_level(sess, LINKER_INFO, levels.linker_info, None, LinkerOutput { inner: msg });
+    };
+
+    if !escaped_stderr.is_empty() {
+        // We already print `warning:` at the start of the diagnostic. Remove it from the linker output if present.
+        escaped_stderr =
+            escaped_stderr.strip_prefix("warning: ").unwrap_or(&escaped_stderr).to_owned();
+        // Windows GNU LD prints uppercase Warning
+        escaped_stderr = escaped_stderr
+            .strip_prefix("Warning: ")
+            .unwrap_or(&escaped_stderr)
+            .replace(": warning: ", ": ");
+        lint_msg(format!("linker stderr: {escaped_stderr}"));
+    }
+    if !escaped_stdout.is_empty() {
+        lint_msg(format!("linker stdout: {}", escaped_stdout))
+    }
+    if !linker_info.is_empty() {
+        lint_info(linker_info);
+    }
+}
+
 /// Create a dynamic library or executable.
 ///
 /// This will invoke the system linker/cc to create the resulting file. This links to all upstream
@@ -860,11 +1003,6 @@ fn link_natively(
 
     match prog {
         Ok(prog) => {
-            let is_msvc_link_exe = sess.target.is_like_msvc
-                && flavor == LinkerFlavor::Msvc(Lld::No)
-                // Match exactly "link.exe"
-                && linker_path.to_str() == Some("link.exe");
-
             if !prog.status.success() {
                 let mut output = prog.stderr.clone();
                 output.extend_from_slice(&prog.stdout);
@@ -884,7 +1022,7 @@ fn link_natively(
                 if let Some(code) = prog.status.code() {
                     // All Microsoft `link.exe` linking ror codes are
                     // four digit numbers in the range 1000 to 9999 inclusive
-                    if is_msvc_link_exe && (code < 1000 || code > 9999) {
+                    if is_msvc_link_exe(sess) && (code < 1000 || code > 9999) {
                         let is_vs_installed = find_msvc_tools::find_vs_version().is_ok();
                         let has_linker =
                             find_msvc_tools::find_tool(sess.target.arch.desc(), "link.exe")
@@ -916,46 +1054,8 @@ fn link_natively(
                 sess.dcx().abort_if_errors();
             }
 
-            let stderr = escape_string(&prog.stderr);
-            let mut stdout = escape_string(&prog.stdout);
-            info!("linker stderr:\n{}", &stderr);
-            info!("linker stdout:\n{}", &stdout);
-
-            // Hide some progress messages from link.exe that we don't care about.
-            // See https://github.com/chromium/chromium/blob/bfa41e41145ffc85f041384280caf2949bb7bd72/build/toolchain/win/tool_wrapper.py#L144-L146
-            if is_msvc_link_exe {
-                if let Ok(str) = str::from_utf8(&prog.stdout) {
-                    let mut output = String::with_capacity(str.len());
-                    for line in stdout.lines() {
-                        if line.starts_with("   Creating library")
-                            || line.starts_with("Generating code")
-                            || line.starts_with("Finished generating code")
-                        {
-                            continue;
-                        }
-                        output += line;
-                        output += "\r\n"
-                    }
-                    stdout = escape_string(output.trim().as_bytes())
-                }
-            }
-
-            let level = crate_info.lint_levels.linker_messages;
-            let lint = |msg| {
-                diag_lint_level(sess, LINKER_MESSAGES, level, None, LinkerOutput { inner: msg });
-            };
-
-            if !prog.stderr.is_empty() {
-                // We already print `warning:` at the start of the diagnostic. Remove it from the linker output if present.
-                let stderr = stderr
-                    .strip_prefix("warning: ")
-                    .unwrap_or(&stderr)
-                    .replace(": warning: ", ": ");
-                lint(format!("linker stderr: {stderr}"));
-            }
-            if !stdout.is_empty() {
-                lint(format!("linker stdout: {}", stdout))
-            }
+            info!("reporting linker output: flavor={flavor:?}");
+            report_linker_output(sess, crate_info.lint_levels, &prog.stdout, &prog.stderr);
         }
         Err(e) => {
             let linker_not_found = e.kind() == io::ErrorKind::NotFound;

compiler/rustc_codegen_ssa/src/lib.rs

@@ -24,6 +24,7 @@ use rustc_data_structures::unord::UnordMap;
 use rustc_hir::CRATE_HIR_ID;
 use rustc_hir::attrs::{CfgEntry, NativeLibKind, WindowsSubsystemKind};
 use rustc_hir::def_id::CrateNum;
+use rustc_lint_defs::builtin::LINKER_INFO;
 use rustc_macros::{Decodable, Encodable};
 use rustc_metadata::EncodedMetadata;
 use rustc_middle::dep_graph::WorkProduct;
@@ -364,10 +365,14 @@ impl CompiledModules {
 #[derive(Copy, Clone, Debug, Encodable, Decodable)]
 pub struct CodegenLintLevels {
     linker_messages: LevelAndSource,
+    linker_info: LevelAndSource,
 }
 
 impl CodegenLintLevels {
     pub fn from_tcx(tcx: TyCtxt<'_>) -> Self {
-        Self { linker_messages: tcx.lint_level_at_node(LINKER_MESSAGES, CRATE_HIR_ID) }
+        Self {
+            linker_messages: tcx.lint_level_at_node(LINKER_MESSAGES, CRATE_HIR_ID),
+            linker_info: tcx.lint_level_at_node(LINKER_INFO, CRATE_HIR_ID),
+        }
     }
 }

compiler/rustc_const_eval/src/check_consts/ops.rs

@@ -265,6 +265,7 @@ fn build_error_for_const_call<'tcx>(
             }
         }
         CallKind::FnCall { fn_trait_id, self_ty } => {
+            let kind = ccx.const_kind();
             let note = match self_ty.kind() {
                 FnDef(def_id, ..) => {
                     let span = tcx.def_span(*def_id);
@@ -274,8 +275,8 @@ fn build_error_for_const_call<'tcx>(
 
                     Some(errors::NonConstClosureNote::FnDef { span })
                 }
-                FnPtr(..) => Some(errors::NonConstClosureNote::FnPtr),
-                Closure(..) => Some(errors::NonConstClosureNote::Closure),
+                FnPtr(..) => Some(errors::NonConstClosureNote::FnPtr { kind }),
+                Closure(..) => Some(errors::NonConstClosureNote::Closure { kind }),
                 _ => None,
             };