liballoc does not need liblibc under certain configurations

Ericson2314 · Ericson2314 · commit f67a7227b705 · 2015-01-07T19:18:59.000Z
diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs
@@ -69,6 +69,8 @@
 
 #[macro_use]
 extern crate core;
+
+#[cfg(all(not(external_funcs), not(external_crate)))]
 extern crate libc;
 
 // Allow testing this library
