Gate macro use.

cjgillot · cjgillot · commit 5d5720835329 · 2020-02-16T12:03:13.000+01:00
diff --git a/src/librustc_infer/lib.rs b/src/librustc_infer/lib.rs
@@ -26,6 +26,7 @@
 
 #[macro_use]
 extern crate rustc_macros;
+#[cfg(target_arch = "x86_64")]
 #[macro_use]
 extern crate rustc_data_structures;
 #[macro_use]
