only allow inferred prereq targets if they already existed

1 files changed, 3 insertions, 1 deletions

diff --git a/src/makefile/mod.rs b/src/makefile/mod.rs
index c81526b..ecadf72 100644
--- a/src/makefile/mod.rs
+++ b/src/makefile/mod.rs
@@ -141,6 +141,7 @@ impl<'a> Makefile<'a> {
                 .map_or_else(String::new, |ext| format!(".{}", ext.to_string_lossy()));
             // is compared to the list of suffixes specified by the .SUFFIXES special
             // targets. If the .s1 suffix is found in .SUFFIXES...
+            // TODO figure out if .SUFFIXES is supposed to apply to gnuful patterns
             if self.special_target_has_prereq(".SUFFIXES", &suffix) || suffix.is_empty() {
                 // the inference rules shall be searched in the order defined...
                 // TODO implement GNUish shortest-stem-first matching
@@ -157,7 +158,8 @@ impl<'a> Makefile<'a> {
                                 // we can't build this based on itself! fuck outta here
                                 return None;
                             }
-                            if self.get_target(&prereq_path_name).is_ok() {
+                            // TODO allow chains but only reluctantly
+                            if self.targets.borrow().contains_key(&prereq_path_name) {
                                 return Some(prereq_path_name);
                             }
                             let prereq_path = PathBuf::from(prereq_path_name);