Ensure assert_fail and abort have noreturn attribute

src/header/stdlib/cbindgen.toml

@@ -8,3 +8,6 @@ cpp_compat = true
 
 [enum]
 prefix_with_name = true
+
+[fn]
+no_return = "__attribute__((noreturn))"

src/header/stdlib/mod.rs

@@ -89,12 +89,19 @@ pub unsafe extern "C" fn a64l(s: *const c_char) -> c_long {
     c_long::from(l)
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn abort() -> ! {
+    eprintln!("Legacy Abort");
+
+    intrinsics::abort();
+}
+
 #[no_mangle]
 pub unsafe extern "C" fn __abort(
     func: *const c_char,
     file: *const c_char,
     line: c_int,
-) {
+) -> ! {
     let func = CStr::from_ptr(func).to_str().unwrap();
     let file = CStr::from_ptr(file).to_str().unwrap();