1 files changed, 16 insertions, 0 deletions
diff --git a/compiler/rustc_data_structures/src/flock/unsupported.rs b/compiler/rustc_data_structures/src/flock/unsupported.rs
new file mode 100644
index 000000000..9245fca37
--- /dev/null
+++ b/compiler/rustc_data_structures/src/flock/unsupported.rs
@@ -0,0 +1,16 @@
+use std::io;
+use std::path::Path;
+
+#[derive(Debug)]
+pub struct Lock(());
+
+impl Lock {
+    pub fn new(_p: &Path, _wait: bool, _create: bool, _exclusive: bool) -> io::Result<Lock> {
+        let msg = "file locks not supported on this platform";
+        Err(io::Error::new(io::ErrorKind::Other, msg))
+    }
+
+    pub fn error_unsupported(_err: &io::Error) -> bool {
+        true
+    }
+}