deprioritize builtin inference rules

1 files changed, 4 insertions, 1 deletions

diff --git a/src/makefile/mod.rs b/src/makefile/mod.rs
index ecadf72..f62249b 100644
--- a/src/makefile/mod.rs
+++ b/src/makefile/mod.rs
@@ -31,6 +31,7 @@ use token::TokenString;
 
 pub struct Makefile<'a> {
     inference_rules: Vec<InferenceRule>,
+    builtin_inference_rules: Vec<InferenceRule>,
     pub macros: MacroSet<'static, 'static>,
     targets: RefCell<HashMap<String, Rc<RefCell<Target>>>>,
     pub first_non_special_target: Option<String>,
@@ -69,7 +70,8 @@ impl<'a> Makefile<'a> {
         }
 
         Makefile {
-            inference_rules,
+            inference_rules: vec![],
+            builtin_inference_rules: inference_rules,
             macros,
             targets: RefCell::new(targets),
             first_non_special_target,
@@ -148,6 +150,7 @@ impl<'a> Makefile<'a> {
                 let inference_rule_candidates = self
                     .inference_rules
                     .iter()
+                    .chain(self.builtin_inference_rules.iter())
                     .filter(|rule| rule.matches(name).unwrap_or(false));
                 for rule in inference_rule_candidates {
                     // whose prerequisite file ($*.s2) exists.