aix: clean up module

build.rs

@@ -37,6 +37,7 @@ const ALLOWED_CFGS: &[&str] = &[
     "musl_redir_time64",
     "vxworks_lt_25_09",
     "libc_pauthtest",
+    "aix_large_file_api",
 ];
 
 // Extra values to allow for check-cfg.
@@ -157,6 +158,11 @@ fn main() {
         set_cfg("linux_time_bits64");
     }
 
+    let aix_large_file_api = env_flag("CARGO_CFG_LIBC_UNSTABLE_LARGE_FILE_API");
+    if aix_large_file_api {
+        set_cfg("aix_large_file_api");
+    }
+
     if target_env == "gnu"
         && matches!(target_os.as_str(), "linux" | "windows")
         && target_ptr_width == "32"