From: Shiz <hi@shiz.me>
Date: Thu, 20 Aug 2017 01:52:36 +0200
Subject: [PATCH] Add Alpine targets

This adds `$arch-alpine-linux-musl` targets to Rust to encode our toolchain
and distribution-specific quirks instead of polluting the main musl target of
`$arch-unknown-linux-musl`.

--- /dev/null
+++ b/src/librustc_back/target/i586_alpine_linux_musl.rs
@@ -0,0 +1,34 @@
+// Copyright 2017 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 LinkerFlavor;
+use target::{Target, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::linux_musl_base::opts();
+    base.cpu = "pentium4".to_string();
+    base.max_atomic_width = Some(64);
+    base.crt_static_default = false;
+    base.static_position_independent_executables = true;
+    base.need_rpath = true;
+
+    Ok(Target {
+        llvm_target: "i586-alpine-linux-musl".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        data_layout: "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128".to_string(),
+        arch: "x86".to_string(),
+        target_os: "linux".to_string(),
+        target_env: "musl".to_string(),
+        target_vendor: "alpine".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: base,
+    })
+}
--- a/src/librustc_back/target/mod.rs
+++ b/src/librustc_back/target/mod.rs
@@ -214,8 +214,11 @@
     ("thumbv7m-none-eabi", thumbv7m_none_eabi),
     ("thumbv7em-none-eabi", thumbv7em_none_eabi),
     ("thumbv7em-none-eabihf", thumbv7em_none_eabihf),
 
     ("msp430-none-elf", msp430_none_elf),
+
+    ("i586-alpine-linux-musl", i586_alpine_linux_musl),
+    ("x86_64-alpine-linux-musl", x86_64_alpine_linux_musl),
 }
 
 /// Everything `rustc` knows about how to compile for a specific target.
--- /dev/null
+++ b/src/librustc_back/target/x86_64_alpine_linux_musl.rs
@@ -0,0 +1,34 @@
+// Copyright 2017 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 LinkerFlavor;
+use target::{Target, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::linux_musl_base::opts();
+    base.cpu = "x86-64".to_string();
+    base.max_atomic_width = Some(64);
+    base.crt_static_default = false;
+    base.static_position_independent_executables = true;
+    base.need_rpath = true;
+
+    Ok(Target {
+        llvm_target: "x86_64-alpine-linux-musl".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "64".to_string(),
+        data_layout: "e-m:e-i64:64-f80:128-n8:16:32:64-S128".to_string(),
+        arch: "x86_64".to_string(),
+        target_os: "linux".to_string(),
+        target_env: "musl".to_string(),
+        target_vendor: "alpine".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: base,
+    })
+}