give context for eagerly-expanded macro definition errors

1 files changed, 12 insertions, 1 deletions

diff --git a/src/makefile/input.rs b/src/makefile/input.rs
index 3fe28e7..3707aef 100644
--- a/src/makefile/input.rs
+++ b/src/makefile/input.rs
@@ -265,6 +265,14 @@ impl<'a, 'parent, R: BufRead> MakefileReader<'a, 'parent, R> {
                 LineType::Macro => self.read_macro(line_tokens, line_number)?,
                 LineType::Unknown => {
                     if !line_tokens.is_empty() {
+                        #[cfg(feature = "full")]
+                        if line_tokens.starts_with("export") {
+                            log::error!("export directive not supported yet");
+                            continue;
+                        } else if line_tokens.starts_with("unexport") {
+                            log::error!("unexport directive not supported yet");
+                            continue;
+                        }
                         bail!(
                             "error: line {}: unknown line \"{}\"",
                             line_number,
@@ -562,7 +570,10 @@ impl<'a, 'parent, R: BufRead> MakefileReader<'a, 'parent, R> {
         value.trim_start();
 
         let value = if expand_value {
-            TokenString::text(self.expand_macros(&value)?)
+            TokenString::text(
+                self.expand_macros(&value)
+                    .wrap_err_with(|| format!("while defining {} on line {}", name, line_number))?,
+            )
         } else {
             value
         };