--- rustc-1.30.0-src/src/librustc_llvm/lib.rs.orig
+++ rustc-1.30.0-src/src/librustc_llvm/lib.rs
@@ -121,3 +121,10 @@
                  LLVMInitializeWebAssemblyTargetMC,
                  LLVMInitializeWebAssemblyAsmPrinter);
 }
+
+#[link(name = "ffi")]
+extern {}
+#[link(name = "z")]
+extern {}
+#[link(name = "ncursesw")]
+extern {}