Fix Build::is_flag_supported: Check exit status of the compiler (#757)

rust-lang · Jan 24, 2023 · d69bc7d · d69bc7d
1 parent 3f77322
commit d69bc7d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/lib.rs b/src/lib.rs
@@ -540,7 +540,7 @@ impl Build {
         cmd.arg(&src);
 
         let output = cmd.output()?;
-        let is_supported = output.stderr.is_empty();
+        let is_supported = output.status.success() && output.stderr.is_empty();
 
         known_status.insert(flag.to_owned(), is_supported);
         Ok(is_supported)