add source macro

Author: taikulawo

libbpf-cargo/src/lib.rs

@@ -88,10 +88,10 @@ mod test;
 /// Canonical error type for this crate.
 #[derive(Error, Debug)]
 pub enum Error {
-    #[error(transparent)]
-    Build(anyhow::Error),
-    #[error(transparent)]
-    Generate(anyhow::Error),
+    #[error("Error building BPF object file {0}")]
+    Build(#[source]anyhow::Error),
+    #[error("Error generating skeleton {0}")]
+    Generate(#[source]anyhow::Error),
 }
 
 pub type Result<T> = result::Result<T, Error>;