Auto merge of #28306 - alexcrichton:less-rt, r=brson

This commit does some refactoring to make almost all of the `std::rt` private.
Specifically, the following items are no longer part of its API:

* DEFAULT_ERROR_CODE
* backtrace
* unwind
* args
* at_exit
* cleanup
* heap (this is just alloc::heap)
* min_stack
* util

The module is now tagged as `#[doc(hidden)]` as the only purpose it's serve is
an entry point for the `panic!` macro via the `begin_unwind` and
`begin_unwind_fmt` reexports.

4 files changed, 7 insertions, 6 deletions

diff --git a/src/libstd/sys/windows/mod.rs b/src/libstd/sys/windows/mod.rs
index 732e2e65864..04bb5e5ea38 100644
--- a/src/libstd/sys/windows/mod.rs
+++ b/src/libstd/sys/windows/mod.rs
@@ -43,6 +43,8 @@ pub mod thread_local;
 pub mod time;
 pub mod stdio;
 
+pub fn init() {}
+
 pub fn decode_error_kind(errno: i32) -> ErrorKind {
     match errno as libc::c_int {
         libc::ERROR_ACCESS_DENIED => ErrorKind::PermissionDenied,
diff --git a/src/libstd/sys/windows/net.rs b/src/libstd/sys/windows/net.rs
index e62b2d8cb18..998b4fcb1a1 100644
--- a/src/libstd/sys/windows/net.rs
+++ b/src/libstd/sys/windows/net.rs
@@ -16,11 +16,10 @@ use net::SocketAddr;
 use num::One;
 use ops::Neg;
 use ptr;
-use rt;
 use sync::Once;
 use sys;
 use sys::c;
-use sys_common::{AsInner, FromInner, IntoInner};
+use sys_common::{self, AsInner, FromInner, IntoInner};
 use sys_common::net::{setsockopt, getsockopt};
 use time::Duration;
 
@@ -39,7 +38,7 @@ pub fn init() {
                                 &mut data);
         assert_eq!(ret, 0);
 
-        let _ = rt::at_exit(|| { c::WSACleanup(); });
+        let _ = sys_common::at_exit(|| { c::WSACleanup(); });
     });
 }
 
diff --git a/src/libstd/sys/windows/stack_overflow.rs b/src/libstd/sys/windows/stack_overflow.rs
index f93f7c756de..d1c2144ef0d 100644
--- a/src/libstd/sys/windows/stack_overflow.rs
+++ b/src/libstd/sys/windows/stack_overflow.rs
@@ -9,7 +9,7 @@
 // except according to those terms.
 
 use libc::{self, LONG};
-use rt::util::report_overflow;
+use sys_common::util::report_overflow;
 use sys::c;
 
 pub struct Handler;
diff --git a/src/libstd/sys/windows/thread_local.rs b/src/libstd/sys/windows/thread_local.rs
index 17bc7ee8876..c544eec7fce 100644
--- a/src/libstd/sys/windows/thread_local.rs
+++ b/src/libstd/sys/windows/thread_local.rs
@@ -13,7 +13,7 @@ use prelude::v1::*;
 use libc::types::os::arch::extra::{DWORD, LPVOID, BOOL};
 
 use ptr;
-use rt;
+use sys_common;
 use sys_common::mutex::Mutex;
 
 pub type Key = DWORD;
@@ -133,7 +133,7 @@ unsafe fn init_dtors() {
 
     let dtors = box Vec::<(Key, Dtor)>::new();
 
-    let res = rt::at_exit(move|| {
+    let res = sys_common::at_exit(move|| {
         DTOR_LOCK.lock();
         let dtors = DTORS;
         DTORS = 1 as *mut _;