don't show deprecation warning without OS

src/dist/dist.rs

@@ -324,9 +324,10 @@ impl TargetTriple {
             .ok_or_else(|| anyhow!(format!("Unable to parse target triple: {}", self.0)))?;
         let partial_other = PartialTargetTriple::new(&other.0)
             .ok_or_else(|| anyhow!(format!("Unable to parse target triple: {}", other.0)))?;
-        // First obvious check is OS, if that doesn't match there's no chance
+        // First obvious check is OS, if that doesn't match then we know it
+        // can't run unless an OS isn't specified
         let ret = if partial_self.os != partial_other.os {
-            false
+            partial_other.os.is_none()
         } else if partial_self.os.as_deref() == Some("pc-windows") {
             // Windows is a special case here, we know we can run 32bit on 64bit
             // and we know we can run gnu and msvc on the same system
@@ -1131,8 +1132,8 @@ mod tests {
             (
                 // 64bit linux
                 "x86_64-unknown-linux-gnu",
-                // Not compatible beyond itself
-                &[],
+                // Not compatible beyond a matching arch
+                &["x86_64"],
                 // Even 32bit linux is considered not compatible by default
                 &["i686-unknown-linux-gnu"],
             ),