librustc/libstd: No longer pass crate_map to start.

src/libstd/unstable/lang.rs

@@ -93,6 +93,7 @@ pub unsafe fn check_not_borrowed(a: *u8,
     borrowck::check_not_borrowed(a, file, line)
 }
 
+#[cfg(stage0)]
 #[lang="start"]
 pub fn start(main: *u8, argc: int, argv: **c_char,
              crate_map: *u8) -> int {
@@ -105,3 +106,16 @@ pub fn start(main: *u8, argc: int, argv: **c_char,
         };
     }
 }
+
+#[cfg(not(stage0))]
+#[lang="start"]
+pub fn start(main: *u8, argc: int, argv: **c_char) -> int {
+    use rt;
+
+    unsafe {
+        return do rt::start(argc, argv as **u8) {
+            let main: extern "Rust" fn() = transmute(main);
+            main();
+        };
+    }
+}