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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 +1,32 @@
+// 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 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(),
+        options: base,
+    })
+}
--- a/src/librustc_back/target/mod.rs
+++ b/src/librustc_back/target/mod.rs
@@ -214,6 +214,9 @@
     ("thumbv7m-none-eabi", thumbv7m_none_eabi),
     ("thumbv7em-none-eabi", thumbv7em_none_eabi),
     ("thumbv7em-none-eabihf", thumbv7em_none_eabihf),
+
+    ("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 +1,32 @@
+// 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 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(),
+        options: base,
+    })
+}
--- /dev/null
+++ b/mk/cfg/i586-alpine-linux-musl.mk
@@ -0,0 +1,29 @@
+# i586-alpine-linux-musl configuration
+CC_i586-alpine-linux-musl=$(CC)
+CXX_i586-alpine-linux-musl=$(CXX)
+CPP_i586-alpine-linux-musl=$(CPP)
+AR_i586-alpine-linux-musl=$(AR)
+CFG_INSTALL_ONLY_RLIB_i586-alpine-linux-musl = 0
+CFG_LIB_NAME_i586-alpine-linux-musl=lib$(1).so
+CFG_STATIC_LIB_NAME_i586-alpine-linux-musl=lib$(1).a
+CFG_LIB_GLOB_i586-alpine-linux-musl=lib$(1)-*.so
+CFG_JEMALLOC_CFLAGS_i586-alpine-linux-musl := 
+CFG_GCCISH_CFLAGS_i586-alpine-linux-musl :=  -g -fPIC
+CFG_GCCISH_CXXFLAGS_i586-alpine-linux-musl :=
+CFG_GCCISH_LINK_FLAGS_i586-alpine-linux-musl :=
+CFG_GCCISH_DEF_FLAG_i586-alpine-linux-musl :=
+CFG_LLC_FLAGS_i586-alpine-linux-musl :=
+CFG_INSTALL_NAME_i586-alpine-linux-musl =
+CFG_EXE_SUFFIX_i586-alpine-linux-musl =
+CFG_WINDOWSY_i586-alpine-linux-musl :=
+CFG_UNIXY_i586-alpine-linux-musl := 1
+CFG_LDPATH_i586-alpine-linux-musl :=
+CFG_RUN_i586-alpine-linux-musl=$(2)
+CFG_RUN_TARG_i586-alpine-linux-musl=$(call CFG_RUN_i586-alpine-linux-musl,,$(2))
+CFG_GNU_TRIPLE_i586-alpine-linux-musl := i586-alpine-linux-musl
+CFG_THIRD_PARTY_OBJECTS_i586-alpine-linux-musl := 
+CFG_INSTALLED_OBJECTS_i586-alpine-linux-musl := 
+
+NATIVE_DEPS_libc_T_i586-alpine-linux-musl += libc.a
+NATIVE_DEPS_std_T_i586-alpine-linux-musl += 
+NATIVE_DEPS_unwind_T_i586-alpine-linux-musl += libunwind.a
--- /dev/null
+++ b/mk/cfg/x86_64-alpine-linux-musl.mk
@@ -0,0 +1,29 @@
+# x86_64-alpine-linux-musl configuration
+CC_x86_64-alpine-linux-musl=$(CC)
+CXX_x86_64-alpine-linux-musl=$(CXX)
+CPP_x86_64-alpine-linux-musl=$(CPP)
+AR_x86_64-alpine-linux-musl=$(AR)
+CFG_INSTALL_ONLY_RLIB_x86_64-alpine-linux-musl = 0
+CFG_LIB_NAME_x86_64-alpine-linux-musl=lib$(1).so
+CFG_STATIC_LIB_NAME_x86_64-alpine-linux-musl=lib$(1).a
+CFG_LIB_GLOB_x86_64-alpine-linux-musl=lib$(1)-*.so
+CFG_JEMALLOC_CFLAGS_x86_64-alpine-linux-musl :=
+CFG_GCCISH_CFLAGS_x86_64-alpine-linux-musl :=  -g -fPIC
+CFG_GCCISH_CXXFLAGS_x86_64-alpine-linux-musl :=
+CFG_GCCISH_LINK_FLAGS_x86_64-alpine-linux-musl :=
+CFG_GCCISH_DEF_FLAG_x86_64-alpine-linux-musl :=
+CFG_LLC_FLAGS_x86_64-alpine-linux-musl :=
+CFG_INSTALL_NAME_x86_64-alpine-linux-musl =
+CFG_EXE_SUFFIX_x86_64-alpine-linux-musl =
+CFG_WINDOWSY_x86_64-alpine-linux-musl :=
+CFG_UNIXY_x86_64-alpine-linux-musl := 1
+CFG_LDPATH_x86_64-alpine-linux-musl :=
+CFG_RUN_x86_64-alpine-linux-musl=$(2)
+CFG_RUN_TARG_x86_64-alpine-linux-musl=$(call CFG_RUN_x86_64-alpine-linux-musl,,$(2))
+CFG_GNU_TRIPLE_x86_64-alpine-linux-musl := x86_64-alpine-linux-musl
+CFG_THIRD_PARTY_OBJECTS_x86_64-alpine-linux-musl := 
+CFG_INSTALLED_OBJECTS_x86_64-alpine-linux-musl := 
+
+NATIVE_DEPS_libc_T_x86_64-alpine-linux-musl += libc.a
+NATIVE_DEPS_std_T_x86_64-alpine-linux-musl += 
+NATIVE_DEPS_unwind_T_x86_64-alpine-linux-musl += libunwind.a