Add sparc64-unknown-netbsd target

mk/cfg/sparc64-unknown-netbsd.mk

@@ -0,0 +1,3 @@
+# This file is intentially left empty to indicate that, while this target is
+# supported, it's not supported using plain GNU Make builds. Use a --rustbuild
+# instead.

src/librustc_back/target/mod.rs

@@ -173,6 +173,7 @@ fn $module() {
     ("i686-unknown-openbsd", i686_unknown_openbsd),
     ("x86_64-unknown-openbsd", x86_64_unknown_openbsd),
 
+    ("sparc64-unknown-netbsd", sparc64_unknown_netbsd),
     ("x86_64-unknown-netbsd", x86_64_unknown_netbsd),
     ("x86_64-rumprun-netbsd", x86_64_rumprun_netbsd),
 

src/librustc_back/target/sparc64_unknown_netbsd.rs

@@ -0,0 +1,30 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use target::{Target, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::netbsd_base::opts();
+    base.cpu = "v9".to_string();
+    base.pre_link_args.push("-m64".to_string());
+    base.max_atomic_width = Some(64);
+
+    Ok(Target {
+        llvm_target: "sparc64-unknown-netbsd".to_string(),
+        target_endian: "big".to_string(),
+        target_pointer_width: "64".to_string(),
+        data_layout: "E-m:e-i64:64-n32:64-S128".to_string(),
+        arch: "sparc64".to_string(),
+        target_os: "netbsd".to_string(),
+        target_env: "".to_string(),
+        target_vendor: "unknown".to_string(),
+        options: base,
+    })
+}