1 files changed, 6 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
index 4942c997682..3b5f5ae1f3d 100644
--- a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
@@ -2362,4 +2362,10 @@ extern "C" {
         bytecode_len: usize,
     ) -> bool;
     pub fn LLVMRustLinkerFree(linker: &'a mut Linker<'a>);
+    #[allow(improper_ctypes)]
+    pub fn LLVMRustComputeLTOCacheKey(
+        key_out: &RustString,
+        mod_id: *const c_char,
+        data: &ThinLTOData,
+    );
 }