Do not fail to compile if autocfg unable to determine rustc version

crossbeam-rs · Nov 22, 2020 · da1081a · da1081a
1 parent 3b14dec
commit da1081a
Showing 1 changed file with 13 additions and 1 deletion.
diff --git a/crossbeam-utils/build.rs b/crossbeam-utils/build.rs
@@ -1,5 +1,17 @@
+use autocfg::AutoCfg;
+
 fn main() {
-    let cfg = autocfg::new();
+    let cfg = match AutoCfg::new() {
+        Ok(cfg) => cfg,
+        Err(e) => {
+            println!(
+                "cargo:warning=crossbeam-utils: unable to determine rustc version: {}",
+                e
+            );
+            return;
+        }
+    };
+
     cfg.emit_type_cfg("core::sync::atomic::AtomicU8", "has_atomic_u8");
     cfg.emit_type_cfg("core::sync::atomic::AtomicU16", "has_atomic_u16");
     cfg.emit_type_cfg("core::sync::atomic::AtomicU32", "has_atomic_u32");