Enable cfg_if feature for libstd

gnzlbg · gnzlbg · commit f35f2dfe80ea · 2019-03-28T10:42:04.000+01:00
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
@@ -241,6 +241,7 @@
 #![feature(bind_by_move_pattern_guards)]
 #![feature(box_syntax)]
 #![feature(c_variadic)]
+#![feature(cfg_if)]
 #![feature(cfg_target_has_atomic)]
 #![feature(cfg_target_thread_local)]
 #![feature(char_error_internals)]
