Auto merge of #128896 - bjorn3:sync_cg_clif-2024-08-09, r=bjorn3

Subtree sync for rustc_codegen_cranelift

The main highlight this time is support for raw-dylib on Windows thanks to `@dpaoliello.` Compiling the ring crate for arm64 macOS has been fixed too.

r? `@ghost`

`@rustbot` label +A-codegen +A-cranelift +T-compiler

1 files changed, 31 insertions, 0 deletions

diff --git a/compiler/rustc_codegen_cranelift/example/raw-dylib.rs b/compiler/rustc_codegen_cranelift/example/raw-dylib.rs
new file mode 100644
index 00000000000..4711884f76a
--- /dev/null
+++ b/compiler/rustc_codegen_cranelift/example/raw-dylib.rs
@@ -0,0 +1,31 @@
+// Tests the raw-dylib feature for Windows.
+// https://doc.rust-lang.org/reference/items/external-blocks.html#the-link-attribute
+
+fn main() {
+    #[cfg(windows)]
+    {
+        #[link(name = "kernel32", kind = "raw-dylib")]
+        extern "C" {
+            fn GetModuleFileNameA(
+                module: *mut std::ffi::c_void,
+                filename: *mut u8,
+                size: u32,
+            ) -> u32;
+        }
+
+        // Get the filename of the current executable....
+        let mut buffer = [0u8; 1024];
+        let size = unsafe {
+            GetModuleFileNameA(core::ptr::null_mut(), buffer.as_mut_ptr(), buffer.len() as u32)
+        };
+        if size == 0 {
+            eprintln!("failed to get module file name: {}", std::io::Error::last_os_error());
+            return;
+        } else {
+            // ...and make sure that it matches the test name.
+            let filename =
+                std::ffi::CStr::from_bytes_with_nul(&buffer[..size as usize + 1]).unwrap();
+            assert!(filename.to_str().unwrap().ends_with("raw-dylib.exe"));
+        }
+    }
+}