std: Deprecate std::old_io::fs

This commit deprecates the majority of std::old_io::fs in favor of std::fs and
its new functionality. Some functions remain non-deprecated but are now behind a
feature gate called `old_fs`. These functions will be deprecated once
suitable replacements have been implemented.

The compiler has been migrated to new `std::fs` and `std::path` APIs where
appropriate as part of this change.

2 files changed, 15 insertions, 3 deletions

diff --git a/src/librustc_llvm/archive_ro.rs b/src/librustc_llvm/archive_ro.rs
index 14a99026aac..f54480e3e52 100644
--- a/src/librustc_llvm/archive_ro.rs
+++ b/src/librustc_llvm/archive_ro.rs
@@ -16,6 +16,7 @@ use ArchiveRef;
 use std::ffi::CString;
 use std::mem;
 use std::raw;
+use std::path::Path;
 
 pub struct ArchiveRO {
     ptr: ArchiveRef,
@@ -29,14 +30,25 @@ impl ArchiveRO {
     /// If this archive is used with a mutable method, then an error will be
     /// raised.
     pub fn open(dst: &Path) -> Option<ArchiveRO> {
-        unsafe {
-            let s = CString::new(dst.as_vec()).unwrap();
+        return unsafe {
+            let s = path2cstr(dst);
             let ar = ::LLVMRustOpenArchive(s.as_ptr());
             if ar.is_null() {
                 None
             } else {
                 Some(ArchiveRO { ptr: ar })
             }
+        };
+
+        #[cfg(unix)]
+        fn path2cstr(p: &Path) -> CString {
+            use std::os::unix::prelude::*;
+            use std::ffi::AsOsStr;
+            CString::new(p.as_os_str().as_bytes()).unwrap()
+        }
+        #[cfg(windows)]
+        fn path2cstr(p: &Path) -> CString {
+            CString::new(p.to_str().unwrap()).unwrap()
         }
     }
 
diff --git a/src/librustc_llvm/lib.rs b/src/librustc_llvm/lib.rs
index 09a187befb2..0a1416ff566 100644
--- a/src/librustc_llvm/lib.rs
+++ b/src/librustc_llvm/lib.rs
@@ -28,9 +28,9 @@
 #![feature(int_uint)]
 #![feature(libc)]
 #![feature(link_args)]
-#![feature(old_path)]
 #![feature(staged_api)]
 #![feature(std_misc)]
+#![feature(path)]
 
 extern crate libc;
 #[macro_use] #[no_link] extern crate rustc_bitflags;