Add track_caller to `builder_helper::output`

If something goes wrong here, showing `fn output` is unhelpful. Show
where the command is being run instead.

diff --git a/src/build_helper/lib.rs b/src/build_helper/lib.rs
index 80f804174ed082e20527f8206cd6aef5bbf5eb19..b1ec072f3f8aae7da31f1d171b770bf097948197 100644 (file)
--- a/src/build_helper/lib.rs
+++ b/src/build_helper/lib.rs
@@ -130,6 +130,7 @@ pub fn make(host: &str) -> PathBuf {
     }
 }
 
+#[track_caller]
 pub fn output(cmd: &mut Command) -> String {
     let output = match cmd.stderr(Stdio::inherit()).output() {
         Ok(status) => status,