From 83ee47b054deb5939be20d7d6ce03ad33d005424 Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Tue, 30 Jun 2015 21:55:00 -0700
Subject: [PATCH] windows: Don't link rust_builtin

This library has no shims which are actually needed on Windows now, so translate
that last easy one into Rust and then don't link it at all on Windows.
---
 src/libstd/rt/util.rs | 15 +++++++++++----
 src/libstd/rtdeps.rs  |  4 ++--
 src/libtest/lib.rs    | 20 +++++++++++++++++---
 src/rt/rust_builtin.c | 36 +++++-------------------------------
 4 files changed, 35 insertions(+), 40 deletions(-)

diff --git a/src/libstd/rt/util.rs b/src/libstd/rt/util.rs
index 04f36d99c8eb..031fda089c84 100644
--- a/src/libstd/rt/util.rs
+++ b/src/libstd/rt/util.rs
@@ -13,7 +13,6 @@ use io::prelude::*;
 use env;
 use fmt;
 use intrinsics;
-use libc::uintptr_t;
 use sync::atomic::{self, Ordering};
 use sys::stdio::Stderr;
 
@@ -22,10 +21,18 @@ use sys::stdio::Stderr;
 /// can't run correctly un-altered. Valgrind is there to help
 /// you notice weirdness in normal, un-doctored code paths!
 pub fn running_on_valgrind() -> bool {
-    extern {
-        fn rust_running_on_valgrind() -> uintptr_t;
+    return on_valgrind();
+    #[cfg(windows)]
+    fn on_valgrind() -> bool { false }
+
+    #[cfg(unix)]
+    fn on_valgrind() -> bool {
+        use libc::uintptr_t;
+        extern {
+            fn rust_running_on_valgrind() -> uintptr_t;
+        }
+        unsafe { rust_running_on_valgrind() != 0 }
     }
-    unsafe { rust_running_on_valgrind() != 0 }
 }
 
 /// Valgrind has a fixed-sized array (size around 2000) of segment descriptors
diff --git a/src/libstd/rtdeps.rs b/src/libstd/rtdeps.rs
index be674c83e221..b7839423e522 100644
--- a/src/libstd/rtdeps.rs
+++ b/src/libstd/rtdeps.rs
@@ -12,8 +12,8 @@
 //! the standard library This varies per-platform, but these libraries are
 //! necessary for running libstd.
 
-// All platforms need to link to rustrt
-#[cfg(not(test))]
+// A few small shims in C that haven't been translated to Rust yet
+#[cfg(all(not(test), not(windows)))]
 #[link(name = "rust_builtin", kind = "static")]
 extern {}
 
diff --git a/src/libtest/lib.rs b/src/libtest/lib.rs
index 0a3c350086cd..724c0b2a8927 100644
--- a/src/libtest/lib.rs
+++ b/src/libtest/lib.rs
@@ -872,7 +872,7 @@ fn run_tests<F>(opts: &TestOpts,
 
 #[allow(deprecated)]
 fn get_concurrency() -> usize {
-    match env::var("RUST_TEST_THREADS") {
+    return match env::var("RUST_TEST_THREADS") {
         Ok(s) => {
             let opt_n: Option<usize> = s.parse().ok();
             match opt_n {
@@ -884,10 +884,24 @@ fn get_concurrency() -> usize {
             if std::rt::util::limit_thread_creation_due_to_osx_and_valgrind() {
                 1
             } else {
-                extern { fn rust_get_num_cpus() -> libc::uintptr_t; }
-                unsafe { rust_get_num_cpus() as usize }
+                num_cpus()
             }
         }
+    };
+
+    #[cfg(windows)]
+    fn num_cpus() -> usize {
+        unsafe {
+            let mut sysinfo = std::mem::zeroed();
+            libc::GetSystemInfo(&mut sysinfo);
+            sysinfo.dwNumberOfProcessors as usize
+        }
+    }
+
+    #[cfg(unix)]
+    fn num_cpus() -> usize {
+        extern { fn rust_get_num_cpus() -> libc::uintptr_t; }
+        unsafe { rust_get_num_cpus() as usize }
     }
 }
 
diff --git a/src/rt/rust_builtin.c b/src/rt/rust_builtin.c
index 1a2917a1dd67..76a3debef59a 100644
--- a/src/rt/rust_builtin.c
+++ b/src/rt/rust_builtin.c
@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#if !defined(_WIN32)
+
 #include <stdint.h>
 #include <time.h>
 #include <string.h>
@@ -15,7 +17,6 @@
 #include <stdlib.h>
 
 
-#if !defined(_WIN32)
 #include <dirent.h>
 #include <pthread.h>
 #include <signal.h>
@@ -23,12 +24,6 @@
 #include <sys/time.h>
 #include <sys/types.h>
 #include <unistd.h>
-#else
-#include <windows.h>
-#include <wincrypt.h>
-#include <stdio.h>
-#include <tchar.h>
-#endif
 
 #ifdef __APPLE__
 #include <TargetConditionals.h>
@@ -41,17 +36,8 @@
 
 /* Foreign builtins. */
 //include valgrind.h after stdint.h so that uintptr_t is defined for msys2 w64
-#ifndef _WIN32
 #include "valgrind/valgrind.h"
-#endif
 
-#if defined(_MSC_VER)
-# define RUST_BUILTIN_API __declspec(dllexport)
-#else
-# define RUST_BUILTIN_API
-#endif
-
-#ifndef _WIN32
 char*
 rust_list_dir_val(struct dirent* entry_ptr) {
     return entry_ptr->d_name;
@@ -92,17 +78,8 @@ int
 rust_dirent_t_size() {
     return sizeof(struct dirent);
 }
-#endif
 
-#if defined(_WIN32)
-int
-get_num_cpus() {
-    SYSTEM_INFO sysinfo;
-    GetSystemInfo(&sysinfo);
-
-    return (int) sysinfo.dwNumberOfProcessors;
-}
-#elif defined(__BSD__)
+#if defined(__BSD__)
 int
 get_num_cpus() {
     /* swiped from http://stackoverflow.com/questions/150355/
@@ -136,7 +113,6 @@ get_num_cpus() {
 }
 #endif
 
-RUST_BUILTIN_API
 uintptr_t
 rust_get_num_cpus() {
     return get_num_cpus();
@@ -144,11 +120,7 @@ rust_get_num_cpus() {
 
 uintptr_t
 rust_running_on_valgrind() {
-#ifdef _WIN32
-    return 0;
-#else
     return RUNNING_ON_VALGRIND;
-#endif
 }
 
 #if defined(__DragonFly__)
@@ -484,6 +456,8 @@ const char * rust_current_exe() {
 
 #endif
 
+#endif // !defined(_WIN32)
+
 //
 // Local Variables:
 // mode: C++