From 37de70de9ac60c5d169b845420c349ecc5820a5c Mon Sep 17 00:00:00 2001
From: Melody Horn <melody@boringcactus.com>
Date: Wed, 14 Apr 2021 18:40:57 -0600
Subject: trace macro expansion, including source

---
 src/makefile/macro.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/makefile/macro.rs b/src/makefile/macro.rs
index 9b52206..d77557b 100644
--- a/src/makefile/macro.rs
+++ b/src/makefile/macro.rs
@@ -276,6 +276,12 @@ impl<'parent, 'lookup> Set<'parent, 'lookup> {
                         }
                         None => macro_value,
                     };
+                    log::trace!(
+                        "expanded {} (from {:?}) into \"{}\"",
+                        token,
+                        self.get(&name).map(|x| &x.source),
+                        &macro_value
+                    );
                     result.push_str(&macro_value);
                 }
                 #[cfg(feature = "full")]
-- 
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