First cut at consolidated core::os module built on core::libc.

src/etc/libc.c

@@ -10,6 +10,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <limits.h>
+#include <wchar.h>
 
 /* c99 */
 #include <inttypes.h>
@@ -53,6 +54,8 @@ void c95_types() {
   put_type("clock_t", clock_t);
   put_type("time_t", time_t);
 
+  put_type("wchar_t", wchar_t);
+
   printf("    }\n");
 }
 

src/libcore/core.rc

@@ -82,6 +82,12 @@ mod to_str;
 // Runtime and language-primitive support
 
 mod libc;
+
+// Rename when transition done.
+#[path = "os.rs"]
+mod new_os;
+mod path;
+
 mod ctypes;
 mod math;
 mod cmath;

src/libcore/core.rs

@@ -1,12 +1,12 @@
 // Top-level, visible-everywhere definitions.
 
-// Export type option as a synonym for option and export the some and none
-// enum constructors.
+// Export various ubiquitous types, constructors, methods.
 
 import option::{some, none};
 import option = option::t;
+import path = path::path;
 import vec::vec_len;
-export option, some, none, vec_len;
+export path, option, some, none, vec_len;
 
 // Export the log levels as global constants. Higher levels mean
 // more-verbosity. Error is the bottom level, default logging level is