1 files changed, 4 insertions, 0 deletions
diff --git a/src/makefile/macro.rs b/src/makefile/macro.rs
index f788edc..7fbb4a6 100644
--- a/src/makefile/macro.rs
+++ b/src/makefile/macro.rs
@@ -82,6 +82,10 @@ impl<'parent, 'lookup> Set<'parent, 'lookup> {
         self.data.remove(name)
     }
 
+    pub fn extend(&mut self, other: Set) {
+        self.data.extend(other.data);
+    }
+
     pub fn expand(&self, text: &TokenString) -> Result<String> {
         let mut result = String::new();
         for token in text.tokens() {