From d8f60f325500a14e590ef2a73ddb69233f596b80 Mon Sep 17 00:00:00 2001
From: Melody Horn <melody@boringcactus.com>
Date: Sun, 4 Apr 2021 16:58:53 -0600
Subject: give .SUFFIXES to file readers for disambiguating

---
 src/makefile/input.rs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/makefile/input.rs b/src/makefile/input.rs
index 5afecc6..b828829 100644
--- a/src/makefile/input.rs
+++ b/src/makefile/input.rs
@@ -182,6 +182,22 @@ impl<'a, 'parent, R: BufRead> MakefileReader<'a, 'parent, R> {
             #[cfg(feature = "full")]
             conditional_stack: Vec::new(),
         };
+        // TODO be smart about this instead
+        if !args.no_builtin_rules {
+            reader.targets.insert(
+                ".SUFFIXES".to_owned(),
+                Target {
+                    name: ".SUFFIXES".into(),
+                    prerequisites: vec![".o", ".c", ".y", ".l", ".a", ".sh", ".f"]
+                        .into_iter()
+                        .map(String::from)
+                        .collect(),
+                    commands: vec![],
+                    stem: None,
+                    already_updated: Cell::new(false),
+                },
+            );
+        }
         reader.read_all()?;
         Ok(reader)
     }
@@ -434,6 +450,11 @@ impl<'a, 'parent, R: BufRead> MakefileReader<'a, 'parent, R> {
             {
                 Some(inference)
             } else {
+                log::info!(
+                    "looks like {:?} is not a suffix rule because .SUFFIXES is {:?}",
+                    inference,
+                    self.targets.get(".SUFFIXES")
+                );
                 None
             }
         });
-- 
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