Merge pull request rust-lang#663 from GuillaumeGomez/edition-2024

Switch to 2024 edition and remove `let_chains` feature

Author: antoyo

Cargo.toml

@@ -2,7 +2,7 @@
 name = "rustc_codegen_gcc"
 version = "0.1.0"
 authors = ["Antoni Boucher <bouanto@zoho.com>"]
-edition = "2018"
+edition = "2024"
 license = "MIT OR Apache-2.0"
 
 [lib]

build_system/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "y"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 
 [dependencies]
 boml = "0.3.1"

build_system/src/main.rs

@@ -60,7 +60,9 @@ pub enum Command {
 
 fn main() {
     if env::var("RUST_BACKTRACE").is_err() {
-        env::set_var("RUST_BACKTRACE", "1");
+        unsafe {
+            env::set_var("RUST_BACKTRACE", "1");
+        }
     }
 
     let command = match env::args().nth(1).as_deref() {

build_system/src/utils.rs

@@ -10,7 +10,7 @@ use std::path::{Path, PathBuf};
 use std::process::{Command, ExitStatus, Output};
 
 #[cfg(unix)]
-extern "C" {
+unsafe extern "C" {
     fn raise(signal: c_int) -> c_int;
 }
 

src/back/lto.rs

@@ -589,7 +589,7 @@ fn thin_lto(
     Ok((opt_jobs, copy_jobs))
 }
 
-pub unsafe fn optimize_thin_module(
+pub fn optimize_thin_module(
     thin_module: ThinModule<GccCodegenBackend>,
     _cgcx: &CodegenContext<GccCodegenBackend>,
 ) -> Result<ModuleCodegen<GccContext>, FatalError> {

src/back/write.rs

@@ -14,7 +14,7 @@ use crate::base::add_pic_option;
 use crate::errors::CopyBitcode;
 use crate::{GccCodegenBackend, GccContext};
 
-pub(crate) unsafe fn codegen(
+pub(crate) fn codegen(
     cgcx: &CodegenContext<GccCodegenBackend>,
     dcx: DiagCtxtHandle<'_>,
     module: ModuleCodegen<GccContext>,

src/consts.rs

@@ -191,13 +191,11 @@ impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
                 // TODO(antoyo): check if it's okay that no link_section is set.
 
                 let typ = self.val_ty(cv).get_aligned(align.bytes());
-                let global = self.declare_private_global(&name[..], typ);
-                global
+                self.declare_private_global(&name[..], typ)
             }
             _ => {
                 let typ = self.val_ty(cv).get_aligned(align.bytes());
-                let global = self.declare_unnamed_global(typ);
-                global
+                self.declare_unnamed_global(typ)
             }
         };
         global.global_set_initializer_rvalue(cv);

src/debuginfo.rs

@@ -289,7 +289,7 @@ impl<'gcc, 'tcx> DebugInfoCodegenMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
     ) -> Self::DILocation {
         let pos = span.lo();
         let DebugLoc { file, line, col } = self.lookup_debug_loc(pos);
-        let loc = match file.name {
+        match file.name {
             rustc_span::FileName::Real(ref name) => match *name {
                 rustc_span::RealFileName::LocalPath(ref name) => {
                     if let Some(name) = name.to_str() {
@@ -314,7 +314,6 @@ impl<'gcc, 'tcx> DebugInfoCodegenMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
                 }
             },
             _ => Location::null(),
-        };
-        loc
+        }
     }
 }

src/declare.rs

@@ -157,6 +157,7 @@ impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
 ///
 /// If there’s a value with the same name already declared, the function will
 /// update the declaration and return existing Value instead.
+#[allow(clippy::let_and_return)]
 fn declare_raw_fn<'gcc>(
     cx: &CodegenCx<'gcc, '_>,
     name: &str,

src/lib.rs

@@ -16,7 +16,7 @@
 #![allow(internal_features)]
 #![doc(rust_logo)]
 #![feature(rustdoc_internals)]
-#![feature(rustc_private, decl_macro, never_type, trusted_len, let_chains)]
+#![feature(rustc_private, decl_macro, never_type, trusted_len)]
 #![allow(broken_intra_doc_links)]
 #![recursion_limit = "256"]
 #![warn(rust_2018_idioms)]
@@ -454,7 +454,7 @@ impl WriteBackendMethods for GccCodegenBackend {
 }
 
 /// This is the entrypoint for a hot plugged rustc_codegen_gccjit
-#[no_mangle]
+#[unsafe(no_mangle)]
 pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {
     #[cfg(feature = "master")]
     let info = {