From 726c4eb1f7446d678a5fca1f8ee7ca00fb8fd14d Mon Sep 17 00:00:00 2001
From: Melody Horn <melody@boringcactus.com>
Date: Mon, 5 Apr 2021 15:10:02 -0600
Subject: set `MAKEFILE_LIST`

---
 src/makefile/input.rs | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/makefile/input.rs b/src/makefile/input.rs
index d6cffdf..d90378d 100644
--- a/src/makefile/input.rs
+++ b/src/makefile/input.rs
@@ -158,9 +158,27 @@ pub struct MakefileReader<'a, 'parent, R: BufRead> {
 impl<'a, 'parent> MakefileReader<'a, 'parent, BufReader<File>> {
     pub fn read_file(
         args: &'a Args,
-        macros: MacroSet<'parent, 'static>,
+        mut macros: MacroSet<'parent, 'static>,
         path: impl AsRef<Path>,
     ) -> Result<Self> {
+        #[cfg(feature = "full")]
+        if let Some((_, mut old_makefile_list)) = macros.pop("MAKEFILE_LIST") {
+            old_makefile_list.extend(TokenString::text(format!(
+                " {}",
+                path.as_ref().to_string_lossy()
+            )));
+            macros.set(
+                "MAKEFILE_LIST".to_owned(),
+                MacroSource::Builtin,
+                old_makefile_list,
+            );
+        } else {
+            macros.set(
+                "MAKEFILE_LIST".to_owned(),
+                MacroSource::Builtin,
+                TokenString::text(path.as_ref().to_string_lossy()),
+            );
+        }
         let file = File::open(path);
         // TODO handle errors
         let file = file.context("couldn't open makefile!")?;
-- 
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