fix: detailed comment about lio_listio

Author: Berrysoft

libc-test/build.rs

@@ -1032,7 +1032,10 @@ fn test_solarish(target: &str) {
             // excluded from the tests.
             "getifaddrs" if is_illumos => true,
 
-            // FIXME: Unsound because `restrict`
+            // FIXME: Our API is unsound. The Rust API allows aliasing
+            // pointers, but the C API requires pointers not to alias.
+            // We should probably be at least using `&`/`&mut` here, see:
+            // https://github.com/gnzlbg/ctest/issues/68
             "lio_listio" => true,
 
             _ => false,