use rlibc crate instead

Author: Jorge Aparicio

Cargo.toml

@@ -3,5 +3,11 @@ authors = ["Jorge Aparicio <[email protected]>"]
 name = "rustc_builtins"
 version = "0.1.0"
 
+[dependencies]
+rlibc = { git = "https://github.com/alexcrichton/rlibc", optional = true }
+
 [dev-dependencies]
 quickcheck = "0.3.1"
+
+[features]
+default = ["rlibc/weak"]

src/lib.rs

@@ -18,12 +18,13 @@ extern crate quickcheck;
 #[cfg(test)]
 extern crate core;
 
+#[cfg(all(not(windows), not(target_os = "macos")))]
+extern crate rlibc;
+
 #[cfg(target_arch = "arm")]
 pub mod arm;
 
 pub mod udiv;
-#[cfg(all(not(windows), not(target_os = "macos")))]
-pub mod mem;
 pub mod mul;
 pub mod shift;