Switch to 2024 edition and remove let_chains feature

Cargo.toml

@@ -2,7 +2,7 @@
 name = "rustc_codegen_gcc"
 version = "0.1.0"
 authors = ["Antoni Boucher <[email protected]>"]
-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/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 = {

tests/lang_tests_common.rs

@@ -42,7 +42,9 @@ pub fn main_inner(profile: Profile) {
         .expect("failed to get absolute path of `gcc-path`")
         .display()
         .to_string();
-    env::set_var("LD_LIBRARY_PATH", gcc_path);
+    unsafe {
+        env::set_var("LD_LIBRARY_PATH", gcc_path);
+    }
 
     fn rust_filter(path: &Path) -> bool {
         path.is_file() && path.extension().expect("extension").to_str().expect("to_str") == "rs"