Delete subrepo gcc/:gcc

7 files changed, 0 insertions, 3127 deletions

diff --git a/gcc/src/bin/gcc-shim.rs b/gcc/src/bin/gcc-shim.rs
deleted file mode 100644
index 7fd0ea8..0000000
--- a/gcc/src/bin/gcc-shim.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-#![cfg_attr(test, allow(dead_code))]
-
-use std::env;
-use std::fs::File;
-use std::io::prelude::*;
-use std::path::PathBuf;
-
-fn main() {
-    let out_dir = PathBuf::from(env::var_os("GCCTEST_OUT_DIR").unwrap());
-    for i in 0.. {
-        let candidate = out_dir.join(format!("out{}", i));
-        if candidate.exists() {
-            continue;
-        }
-        let mut f = File::create(candidate).unwrap();
-        for arg in env::args().skip(1) {
-            writeln!(f, "{}", arg).unwrap();
-        }
-
-        File::create(out_dir.join("libfoo.a")).unwrap();
-        break;
-    }
-}
diff --git a/gcc/src/com.rs b/gcc/src/com.rs
deleted file mode 100644
index bd8cce7..0000000
--- a/gcc/src/com.rs
+++ /dev/null
@@ -1,125 +0,0 @@
-// Copyright © 2017 winapi-rs developers
-// 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.
-// All files in the project carrying such notice may not be copied, modified, or distributed
-// except according to those terms.
-
-#![allow(unused)]
-
-use std::ffi::{OsStr, OsString};
-use std::mem::forget;
-use std::ops::Deref;
-use std::os::windows::ffi::{OsStrExt, OsStringExt};
-use std::ptr::null_mut;
-use std::slice::from_raw_parts;
-use winapi::Interface;
-use winapi::BSTR;
-use winapi::CoInitializeEx;
-use winapi::COINIT_MULTITHREADED;
-use winapi::{SysFreeString, SysStringLen};
-use winapi::IUnknown;
-use winapi::{S_OK, S_FALSE, HRESULT};
-
-pub fn initialize() -> Result<(), HRESULT> {
-    let err = unsafe { CoInitializeEx(null_mut(), COINIT_MULTITHREADED) };
-    if err != S_OK && err != S_FALSE {
-        // S_FALSE just means COM is already initialized
-        return Err(err);
-    }
-    Ok(())
-}
-
-pub struct ComPtr<T>(*mut T) where T: Interface;
-impl<T> ComPtr<T> where T: Interface {
-    /// Creates a `ComPtr` to wrap a raw pointer.
-    /// It takes ownership over the pointer which means it does __not__ call `AddRef`.
-    /// `T` __must__ be a COM interface that inherits from `IUnknown`.
-    pub unsafe fn from_raw(ptr: *mut T) -> ComPtr<T> {
-        assert!(!ptr.is_null());
-        ComPtr(ptr)
-    }
-    /// Casts up the inheritance chain
-    pub fn up<U>(self) -> ComPtr<U> where T: Deref<Target=U>, U: Interface {
-        ComPtr(self.into_raw() as *mut U)
-    }
-    /// Extracts the raw pointer.
-    /// You are now responsible for releasing it yourself.
-    pub fn into_raw(self) -> *mut T {
-        let p = self.0;
-        forget(self);
-        p
-    }
-    /// For internal use only.
-    fn as_unknown(&self) -> &IUnknown {
-        unsafe { &*(self.0 as *mut IUnknown) }
-    }
-    /// Performs QueryInterface fun.
-    pub fn cast<U>(&self) -> Result<ComPtr<U>, i32> where U: Interface {
-        let mut obj = null_mut();
-        let err = unsafe { self.as_unknown().QueryInterface(&U::uuidof(), &mut obj) };
-        if err < 0 { return Err(err); }
-        Ok(unsafe { ComPtr::from_raw(obj as *mut U) })
-    }
-}
-impl<T> Deref for ComPtr<T> where T: Interface {
-    type Target = T;
-    fn deref(&self) -> &T {
-        unsafe { &*self.0 }
-    }
-}
-impl<T> Clone for ComPtr<T> where T: Interface {
-    fn clone(&self) -> Self {
-        unsafe {
-            self.as_unknown().AddRef();
-            ComPtr::from_raw(self.0)
-        }
-    }
-}
-impl<T> Drop for ComPtr<T> where T: Interface {
-    fn drop(&mut self) {
-        unsafe { self.as_unknown().Release(); }
-    }
-}
-pub struct BStr(BSTR);
-impl BStr {
-    pub unsafe fn from_raw(s: BSTR) -> BStr {
-        BStr(s)
-    }
-    pub fn to_osstring(&self) -> OsString {
-        let len = unsafe { SysStringLen(self.0) };
-        let slice = unsafe { from_raw_parts(self.0, len as usize) };
-        OsStringExt::from_wide(slice)
-    }
-}
-impl Drop for BStr {
-    fn drop(&mut self) {
-        unsafe { SysFreeString(self.0) };
-    }
-}
-
-pub trait ToWide {
-    fn to_wide(&self) -> Vec<u16>;
-    fn to_wide_null(&self) -> Vec<u16>;
-}
-impl<T> ToWide for T where T: AsRef<OsStr> {
-    fn to_wide(&self) -> Vec<u16> {
-        self.as_ref().encode_wide().collect()
-    }
-    fn to_wide_null(&self) -> Vec<u16> {
-        self.as_ref().encode_wide().chain(Some(0)).collect()
-    }
-}
-pub trait FromWide where Self: Sized {
-    fn from_wide(wide: &[u16]) -> Self;
-    fn from_wide_null(wide: &[u16]) -> Self {
-        let len = wide.iter().take_while(|&&c| c != 0).count();
-        Self::from_wide(&wide[..len])
-    }
-}
-impl FromWide for OsString {
-    fn from_wide(wide: &[u16]) -> OsString {
-        OsStringExt::from_wide(wide)
-    }
-}
-
diff --git a/gcc/src/lib.rs b/gcc/src/lib.rs
deleted file mode 100644
index 4c5e724..0000000
--- a/gcc/src/lib.rs
+++ /dev/null
@@ -1,1684 +0,0 @@
-//! A library for build scripts to compile custom C code
-//!
-//! This library is intended to be used as a `build-dependencies` entry in
-//! `Cargo.toml`:
-//!
-//! ```toml
-//! [build-dependencies]
-//! gcc = "0.3"
-//! ```
-//!
-//! The purpose of this crate is to provide the utility functions necessary to
-//! compile C code into a static archive which is then linked into a Rust crate.
-//! Configuration is available through the `Build` struct.
-//!
-//! This crate will automatically detect situations such as cross compilation or
-//! other environment variables set by Cargo and will build code appropriately.
-//!
-//! The crate is not limited to C code, it can accept any source code that can
-//! be passed to a C or C++ compiler. As such, assembly files with extensions
-//! `.s` (gcc/clang) and `.asm` (MSVC) can also be compiled.
-//!
-//! [`Build`]: struct.Build.html
-//!
-//! # Examples
-//!
-//! Use the `Build` struct to compile `src/foo.c`:
-//!
-//! ```no_run
-//! extern crate gcc;
-//!
-//! fn main() {
-//!     gcc::Build::new()
-//!                .file("src/foo.c")
-//!                .define("FOO", Some("bar"))
-//!                .include("src")
-//!                .compile("foo");
-//! }
-//! ```
-
-#![doc(html_root_url = "https://docs.rs/gcc/0.3")]
-#![cfg_attr(test, deny(warnings))]
-#![deny(missing_docs)]
-
-#[cfg(feature = "parallel")]
-extern crate rayon;
-
-use std::env;
-use std::ffi::{OsString, OsStr};
-use std::fs;
-use std::path::{PathBuf, Path};
-use std::process::{Command, Stdio, Child};
-use std::io::{self, BufReader, BufRead, Read, Write};
-use std::thread::{self, JoinHandle};
-
-#[doc(hidden)]
-#[deprecated(since="0.3.51", note="gcc::Config has been renamed to gcc::Build")]
-pub type Config = Build;
-
-#[cfg(feature = "parallel")]
-use std::sync::Mutex;
-
-// These modules are all glue to support reading the MSVC version from
-// the registry and from COM interfaces
-#[cfg(windows)]
-mod registry;
-#[cfg(windows)]
-#[macro_use]
-mod winapi;
-#[cfg(windows)]
-mod com;
-#[cfg(windows)]
-mod setup_config;
-
-pub mod windows_registry;
-
-/// Extra configuration to pass to gcc.
-#[derive(Clone, Debug)]
-pub struct Build {
-    include_directories: Vec<PathBuf>,
-    definitions: Vec<(String, Option<String>)>,
-    objects: Vec<PathBuf>,
-    flags: Vec<String>,
-    flags_supported: Vec<String>,
-    files: Vec<PathBuf>,
-    cpp: bool,
-    cpp_link_stdlib: Option<Option<String>>,
-    cpp_set_stdlib: Option<String>,
-    target: Option<String>,
-    host: Option<String>,
-    out_dir: Option<PathBuf>,
-    opt_level: Option<String>,
-    debug: Option<bool>,
-    env: Vec<(OsString, OsString)>,
-    compiler: Option<PathBuf>,
-    archiver: Option<PathBuf>,
-    cargo_metadata: bool,
-    pic: Option<bool>,
-    static_crt: Option<bool>,
-    shared_flag: Option<bool>,
-    static_flag: Option<bool>,
-    warnings_into_errors: bool,
-    warnings: bool,
-}
-
-/// Represents the types of errors that may occur while using gcc-rs.
-#[derive(Clone, Debug)]
-enum ErrorKind {
-    /// Error occurred while performing I/O.
-    IOError,
-    /// Invalid architecture supplied.
-    ArchitectureInvalid,
-    /// Environment variable not found, with the var in question as extra info.
-    EnvVarNotFound,
-    /// Error occurred while using external tools (ie: invocation of compiler).
-    ToolExecError,
-    /// Error occurred due to missing external tools.
-    ToolNotFound,
-}
-
-/// Represents an internal error that occurred, with an explaination.
-#[derive(Clone, Debug)]
-pub struct Error {
-    /// Describes the kind of error that occurred.
-    kind: ErrorKind,
-    /// More explaination of error that occurred.
-    message: String,
-}
-
-impl Error {
-    fn new(kind: ErrorKind, message: &str) -> Error {
-        Error { kind: kind, message: message.to_owned() }
-    }
-}
-
-impl From<io::Error> for Error {
-    fn from(e: io::Error) -> Error {
-        Error::new(ErrorKind::IOError, &format!("{}", e))
-    }
-}
-
-/// Configuration used to represent an invocation of a C compiler.
-///
-/// This can be used to figure out what compiler is in use, what the arguments
-/// to it are, and what the environment variables look like for the compiler.
-/// This can be used to further configure other build systems (e.g. forward
-/// along CC and/or CFLAGS) or the `to_command` method can be used to run the
-/// compiler itself.
-#[derive(Clone, Debug)]
-pub struct Tool {
-    path: PathBuf,
-    args: Vec<OsString>,
-    env: Vec<(OsString, OsString)>,
-    family: ToolFamily
-}
-
-/// Represents the family of tools this tool belongs to.
-///
-/// Each family of tools differs in how and what arguments they accept.
-///
-/// Detection of a family is done on best-effort basis and may not accurately reflect the tool.
-#[derive(Copy, Clone, Debug, PartialEq)]
-enum ToolFamily {
-    /// Tool is GNU Compiler Collection-like.
-    Gnu,
-    /// Tool is Clang-like. It differs from the GCC in a sense that it accepts superset of flags
-    /// and its cross-compilation approach is different.
-    Clang,
-    /// Tool is the MSVC cl.exe.
-    Msvc,
-}
-
-impl ToolFamily {
-    /// What the flag to request debug info for this family of tools look like
-    fn debug_flag(&self) -> &'static str {
-        match *self {
-            ToolFamily::Msvc => "/Z7",
-            ToolFamily::Gnu |
-            ToolFamily::Clang => "-g",
-        }
-    }
-
-    /// What the flag to include directories into header search path looks like
-    fn include_flag(&self) -> &'static str {
-        match *self {
-            ToolFamily::Msvc => "/I",
-            ToolFamily::Gnu |
-            ToolFamily::Clang => "-I",
-        }
-    }
-
-    /// What the flag to request macro-expanded source output looks like
-    fn expand_flag(&self) -> &'static str {
-        match *self {
-            ToolFamily::Msvc => "/E",
-            ToolFamily::Gnu |
-            ToolFamily::Clang => "-E",
-        }
-    }
-
-    /// What the flags to enable all warnings
-    fn warnings_flags(&self) -> &'static [&'static str] {
-        static MSVC_FLAGS: &'static [&'static str] = &["/W4"];
-        static GNU_CLANG_FLAGS: &'static [&'static str] = &["-Wall", "-Wextra"];
-
-        match *self {
-            ToolFamily::Msvc => &MSVC_FLAGS,
-            ToolFamily::Gnu |
-            ToolFamily::Clang => &GNU_CLANG_FLAGS,
-        }
-    }
-
-    /// What the flag to turn warning into errors
-    fn warnings_to_errors_flag(&self) -> &'static str {
-        match *self {
-            ToolFamily::Msvc => "/WX",
-            ToolFamily::Gnu |
-            ToolFamily::Clang => "-Werror"
-        }
-    }
-}
-
-/// Compile a library from the given set of input C files.
-///
-/// This will simply compile all files into object files and then assemble them
-/// into the output. This will read the standard environment variables to detect
-/// cross compilations and such.
-///
-/// This function will also print all metadata on standard output for Cargo.
-///
-/// # Example
-///
-/// ```no_run
-/// gcc::compile_library("foo", &["foo.c", "bar.c"]);
-/// ```
-#[deprecated]
-#[doc(hidden)]
-pub fn compile_library(output: &str, files: &[&str]) {
-    let mut c = Build::new();
-    for f in files.iter() {
-        c.file(*f);
-    }
-    c.compile(output);
-}
-
-impl Build {
-    /// Construct a new instance of a blank set of configuration.
-    ///
-    /// This builder is finished with the [`compile`] function.
-    ///
-    /// [`compile`]: struct.Build.html#method.compile
-    pub fn new() -> Build {
-        Build {
-            include_directories: Vec::new(),
-            definitions: Vec::new(),
-            objects: Vec::new(),
-            flags: Vec::new(),
-            flags_supported: Vec::new(),
-            files: Vec::new(),
-            shared_flag: None,
-            static_flag: None,
-            cpp: false,
-            cpp_link_stdlib: None,
-            cpp_set_stdlib: None,
-            target: None,
-            host: None,
-            out_dir: None,
-            opt_level: None,
-            debug: None,
-            env: Vec::new(),
-            compiler: None,
-            archiver: None,
-            cargo_metadata: true,
-            pic: None,
-            static_crt: None,
-            warnings: true,
-            warnings_into_errors: false,
-        }
-    }
-
-    /// Add a directory to the `-I` or include path for headers
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// use std::path::Path;
-    ///
-    /// let library_path = Path::new("/path/to/library");
-    ///
-    /// gcc::Build::new()
-    ///            .file("src/foo.c")
-    ///            .include(library_path)
-    ///            .include("src")
-    ///            .compile("foo");
-    /// ```
-    pub fn include<P: AsRef<Path>>(&mut self, dir: P) -> &mut Build {
-        self.include_directories.push(dir.as_ref().to_path_buf());
-        self
-    }
-
-    /// Specify a `-D` variable with an optional value.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// gcc::Build::new()
-    ///            .file("src/foo.c")
-    ///            .define("FOO", "BAR")
-    ///            .define("BAZ", None)
-    ///            .compile("foo");
-    /// ```
-    pub fn define<'a, V: Into<Option<&'a str>>>(&mut self, var: &str, val: V) -> &mut Build {
-        self.definitions.push((var.to_string(), val.into().map(|s| s.to_string())));
-        self
-    }
-
-    /// Add an arbitrary object file to link in
-    pub fn object<P: AsRef<Path>>(&mut self, obj: P) -> &mut Build {
-        self.objects.push(obj.as_ref().to_path_buf());
-        self
-    }
-
-    /// Add an arbitrary flag to the invocation of the compiler
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// gcc::Build::new()
-    ///            .file("src/foo.c")
-    ///            .flag("-ffunction-sections")
-    ///            .compile("foo");
-    /// ```
-    pub fn flag(&mut self, flag: &str) -> &mut Build {
-        self.flags.push(flag.to_string());
-        self
-    }
-
-    fn ensure_check_file(&self) -> Result<PathBuf, Error> {
-        let out_dir = self.get_out_dir()?;
-        let src = if self.cpp {
-            out_dir.join("flag_check.cpp")
-        } else {
-            out_dir.join("flag_check.c")
-        };
-
-        if !src.exists() {
-            let mut f = fs::File::create(&src)?;
-            write!(f, "int main(void) {{ return 0; }}")?;
-        }
-
-        Ok(src)
-    }
-
-    fn is_flag_supported(&self, flag: &str) -> Result<bool, Error> {
-        let out_dir = self.get_out_dir()?;
-        let src = self.ensure_check_file()?;
-        let obj = out_dir.join("flag_check");
-        let target = self.get_target()?;
-        let mut cfg = Build::new();
-        cfg.flag(flag)
-           .target(&target)
-           .opt_level(0)
-           .host(&target)
-           .debug(false)
-           .cpp(self.cpp);
-        let compiler = cfg.try_get_compiler()?;
-        let mut cmd = compiler.to_command();
-        command_add_output_file(&mut cmd, &obj, target.contains("msvc"), false);
-        cmd.arg(&src);
-
-        let output = cmd.output()?;
-        Ok(output.stderr.is_empty())
-    }
-
-    /// Add an arbitrary flag to the invocation of the compiler if it supports it
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// gcc::Build::new()
-    ///            .file("src/foo.c")
-    ///            .flag_if_supported("-Wlogical-op") // only supported by GCC
-    ///            .flag_if_supported("-Wunreachable-code") // only supported by clang
-    ///            .compile("foo");
-    /// ```
-    pub fn flag_if_supported(&mut self, flag: &str) -> &mut Build {
-        self.flags_supported.push(flag.to_string());
-        self
-    }
-
-    /// Set the `-shared` flag.
-    ///
-    /// When enabled, the compiler will produce a shared object which can
-    /// then be linked with other objects to form an executable.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// gcc::Build::new()
-    ///            .file("src/foo.c")
-    ///            .shared_flag(true)
-    ///            .compile("libfoo.so");
-    /// ```
-
-    pub fn shared_flag(&mut self, shared_flag: bool) -> &mut Build {
-        self.shared_flag = Some(shared_flag);
-        self
-    }
-
-    /// Set the `-static` flag.
-    ///
-    /// When enabled on systems that support dynamic linking, this prevents
-    /// linking with the shared libraries.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// gcc::Build::new()
-    ///            .file("src/foo.c")
-    ///            .shared_flag(true)
-    ///            .static_flag(true)
-    ///            .compile("foo");
-    /// ```
-    pub fn static_flag(&mut self, static_flag: bool) -> &mut Build {
-        self.static_flag = Some(static_flag);
-        self
-    }
-
-    /// Add a file which will be compiled
-    pub fn file<P: AsRef<Path>>(&mut self, p: P) -> &mut Build {
-        self.files.push(p.as_ref().to_path_buf());
-        self
-    }
-
-    /// Add files which will be compiled
-    pub fn files<P>(&mut self, p: P) -> &mut Build
-        where P: IntoIterator,
-              P::Item: AsRef<Path> {
-        for file in p.into_iter() {
-            self.file(file);
-        }
-        self
-    }
-
-    /// Set C++ support.
-    ///
-    /// The other `cpp_*` options will only become active if this is set to
-    /// `true`.
-    pub fn cpp(&mut self, cpp: bool) -> &mut Build {
-        self.cpp = cpp;
-        self
-    }
-
-    /// Set warnings into errors flag.
-    ///
-    /// Disabled by default.
-    ///
-    /// Warning: turning warnings into errors only make sense
-    /// if you are a developer of the crate using gcc-rs.
-    /// Some warnings only appear on some architecture or
-    /// specific version of the compiler. Any user of this crate,
-    /// or any other crate depending on it, could fail during
-    /// compile time.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// gcc::Build::new()
-    ///            .file("src/foo.c")
-    ///            .warnings_into_errors(true)
-    ///            .compile("libfoo.a");
-    /// ```
-    pub fn warnings_into_errors(&mut self, warnings_into_errors: bool) -> &mut Build {
-        self.warnings_into_errors = warnings_into_errors;
-        self
-    }
-
-    /// Set warnings flags.
-    ///
-    /// Adds some flags:
-    /// - "/Wall" for MSVC.
-    /// - "-Wall", "-Wextra" for GNU and Clang.
-    ///
-    /// Enabled by default.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// gcc::Build::new()
-    ///            .file("src/foo.c")
-    ///            .warnings(false)
-    ///            .compile("libfoo.a");
-    /// ```
-    pub fn warnings(&mut self, warnings: bool) -> &mut Build {
-        self.warnings = warnings;
-        self
-    }
-
-    /// Set the standard library to link against when compiling with C++
-    /// support.
-    ///
-    /// The default value of this property depends on the current target: On
-    /// OS X `Some("c++")` is used, when compiling for a Visual Studio based
-    /// target `None` is used and for other targets `Some("stdc++")` is used.
-    ///
-    /// A value of `None` indicates that no automatic linking should happen,
-    /// otherwise cargo will link against the specified library.
-    ///
-    /// The given library name must not contain the `lib` prefix.
-    ///
-    /// Common values:
-    /// - `stdc++` for GNU
-    /// - `c++` for Clang
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// gcc::Build::new()
-    ///            .file("src/foo.c")
-    ///            .shared_flag(true)
-    ///            .cpp_link_stdlib("stdc++")
-    ///            .compile("libfoo.so");
-    /// ```
-    pub fn cpp_link_stdlib<'a, V: Into<Option<&'a str>>>(&mut self, cpp_link_stdlib: V) -> &mut Build {
-        self.cpp_link_stdlib = Some(cpp_link_stdlib.into().map(|s| s.into()));
-        self
-    }
-
-    /// Force the C++ compiler to use the specified standard library.
-    ///
-    /// Setting this option will automatically set `cpp_link_stdlib` to the same
-    /// value.
-    ///
-    /// The default value of this option is always `None`.
-    ///
-    /// This option has no effect when compiling for a Visual Studio based
-    /// target.
-    ///
-    /// This option sets the `-stdlib` flag, which is only supported by some
-    /// compilers (clang, icc) but not by others (gcc). The library will not
-    /// detect which compiler is used, as such it is the responsibility of the
-    /// caller to ensure that this option is only used in conjuction with a
-    /// compiler which supports the `-stdlib` flag.
-    ///
-    /// A value of `None` indicates that no specific C++ standard library should
-    /// be used, otherwise `-stdlib` is added to the compile invocation.
-    ///
-    /// The given library name must not contain the `lib` prefix.
-    ///
-    /// Common values:
-    /// - `stdc++` for GNU
-    /// - `c++` for Clang
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// gcc::Build::new()
-    ///            .file("src/foo.c")
-    ///            .cpp_set_stdlib("c++")
-    ///            .compile("libfoo.a");
-    /// ```
-    pub fn cpp_set_stdlib<'a, V: Into<Option<&'a str>>>(&mut self, cpp_set_stdlib: V) -> &mut Build {
-        let cpp_set_stdlib = cpp_set_stdlib.into();
-        self.cpp_set_stdlib = cpp_set_stdlib.map(|s| s.into());
-        self.cpp_link_stdlib(cpp_set_stdlib);
-        self
-    }
-
-    /// Configures the target this configuration will be compiling for.
-    ///
-    /// This option is automatically scraped from the `TARGET` environment
-    /// variable by build scripts, so it's not required to call this function.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// gcc::Build::new()
-    ///            .file("src/foo.c")
-    ///            .target("aarch64-linux-android")
-    ///            .compile("foo");
-    /// ```
-    pub fn target(&mut self, target: &str) -> &mut Build {
-        self.target = Some(target.to_string());
-        self
-    }
-
-    /// Configures the host assumed by this configuration.
-    ///
-    /// This option is automatically scraped from the `HOST` environment
-    /// variable by build scripts, so it's not required to call this function.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// gcc::Build::new()
-    ///            .file("src/foo.c")
-    ///            .host("arm-linux-gnueabihf")
-    ///            .compile("foo");
-    /// ```
-    pub fn host(&mut self, host: &str) -> &mut Build {
-        self.host = Some(host.to_string());
-        self
-    }
-
-    /// Configures the optimization level of the generated object files.
-    ///
-    /// This option is automatically scraped from the `OPT_LEVEL` environment
-    /// variable by build scripts, so it's not required to call this function.
-    pub fn opt_level(&mut self, opt_level: u32) -> &mut Build {
-        self.opt_level = Some(opt_level.to_string());
-        self
-    }
-
-    /// Configures the optimization level of the generated object files.
-    ///
-    /// This option is automatically scraped from the `OPT_LEVEL` environment
-    /// variable by build scripts, so it's not required to call this function.
-    pub fn opt_level_str(&mut self, opt_level: &str) -> &mut Build {
-        self.opt_level = Some(opt_level.to_string());
-        self
-    }
-
-    /// Configures whether the compiler will emit debug information when
-    /// generating object files.
-    ///
-    /// This option is automatically scraped from the `PROFILE` environment
-    /// variable by build scripts (only enabled when the profile is "debug"), so
-    /// it's not required to call this function.
-    pub fn debug(&mut self, debug: bool) -> &mut Build {
-        self.debug = Some(debug);
-        self
-    }
-
-    /// Configures the output directory where all object files and static
-    /// libraries will be located.
-    ///
-    /// This option is automatically scraped from the `OUT_DIR` environment
-    /// variable by build scripts, so it's not required to call this function.
-    pub fn out_dir<P: AsRef<Path>>(&mut self, out_dir: P) -> &mut Build {
-        self.out_dir = Some(out_dir.as_ref().to_owned());
-        self
-    }
-
-    /// Configures the compiler to be used to produce output.
-    ///
-    /// This option is automatically determined from the target platform or a
-    /// number of environment variables, so it's not required to call this
-    /// function.
-    pub fn compiler<P: AsRef<Path>>(&mut self, compiler: P) -> &mut Build {
-        self.compiler = Some(compiler.as_ref().to_owned());
-        self
-    }
-
-    /// Configures the tool used to assemble archives.
-    ///
-    /// This option is automatically determined from the target platform or a
-    /// number of environment variables, so it's not required to call this
-    /// function.
-    pub fn archiver<P: AsRef<Path>>(&mut self, archiver: P) -> &mut Build {
-        self.archiver = Some(archiver.as_ref().to_owned());
-        self
-    }
-    /// Define whether metadata should be emitted for cargo allowing it to
-    /// automatically link the binary. Defaults to `true`.
-    ///
-    /// The emitted metadata is:
-    ///
-    ///  - `rustc-link-lib=static=`*compiled lib*
-    ///  - `rustc-link-search=native=`*target folder*
-    ///  - When target is MSVC, the ATL-MFC libs are added via `rustc-link-search=native=`
-    ///  - When C++ is enabled, the C++ stdlib is added via `rustc-link-lib`
-    ///
-    pub fn cargo_metadata(&mut self, cargo_metadata: bool) -> &mut Build {
-        self.cargo_metadata = cargo_metadata;
-        self
-    }
-
-    /// Configures whether the compiler will emit position independent code.
-    ///
-    /// This option defaults to `false` for `windows-gnu` targets and
-    /// to `true` for all other targets.
-    pub fn pic(&mut self, pic: bool) -> &mut Build {
-        self.pic = Some(pic);
-        self
-    }
-
-    /// Configures whether the /MT flag or the /MD flag will be passed to msvc build tools.
-    ///
-    /// This option defaults to `false`, and affect only msvc targets.
-    pub fn static_crt(&mut self, static_crt: bool) -> &mut Build {
-        self.static_crt = Some(static_crt);
-        self
-    }
-
-    #[doc(hidden)]
-    pub fn __set_env<A, B>(&mut self, a: A, b: B) -> &mut Build
-        where A: AsRef<OsStr>,
-              B: AsRef<OsStr>
-    {
-        self.env.push((a.as_ref().to_owned(), b.as_ref().to_owned()));
-        self
-    }
-
-    /// Run the compiler, generating the file `output`
-    ///
-    /// This will return a result instead of panicing; see compile() for the complete description.
-    pub fn try_compile(&self, output: &str) -> Result<(), Error> {
-        let (lib_name, gnu_lib_name) = if output.starts_with("lib") && output.ends_with(".a") {
-                (&output[3..output.len() - 2], output.to_owned())
-            } else {
-                let mut gnu = String::with_capacity(5 + output.len());
-                gnu.push_str("lib");
-                gnu.push_str(&output);
-                gnu.push_str(".a");
-                (output, gnu)
-            };
-        let dst = self.get_out_dir()?;
-
-        let mut objects = Vec::new();
-        let mut src_dst = Vec::new();
-        for file in self.files.iter() {
-            let obj = dst.join(file).with_extension("o");
-            let obj = if !obj.starts_with(&dst) {
-                dst.join(obj.file_name().ok_or_else(|| Error::new(ErrorKind::IOError, "Getting object file details failed."))?)
-            } else {
-                obj
-            };
-
-            match obj.parent() {
-                Some(s) => fs::create_dir_all(s)?,
-                None => return Err(Error::new(ErrorKind::IOError, "Getting object file details failed.")),
-            };
-
-            src_dst.push((file.to_path_buf(), obj.clone()));
-            objects.push(obj);
-        }
-        self.compile_objects(&src_dst)?;
-        self.assemble(lib_name, &dst.join(gnu_lib_name), &objects)?;
-
-        if self.get_target()?.contains("msvc") {
-            let compiler = self.get_base_compiler()?;
-            let atlmfc_lib = compiler.env()
-                .iter()
-                .find(|&&(ref var, _)| var.as_os_str() == OsStr::new("LIB"))
-                .and_then(|&(_, ref lib_paths)| {
-                    env::split_paths(lib_paths).find(|path| {
-                        let sub = Path::new("atlmfc/lib");
-                        path.ends_with(sub) || path.parent().map_or(false, |p| p.ends_with(sub))
-                    })
-                });
-
-            if let Some(atlmfc_lib) = atlmfc_lib {
-                self.print(&format!("cargo:rustc-link-search=native={}", atlmfc_lib.display()));
-            }
-        }
-
-        self.print(&format!("cargo:rustc-link-lib=static={}", lib_name));
-        self.print(&format!("cargo:rustc-link-search=native={}", dst.display()));
-
-        // Add specific C++ libraries, if enabled.
-        if self.cpp {
-            if let Some(stdlib) = self.get_cpp_link_stdlib()? {
-                self.print(&format!("cargo:rustc-link-lib={}", stdlib));
-            }
-        }
-
-        Ok(())
-    }
-
-    /// Run the compiler, generating the file `output`
-    ///
-    /// The name `output` should be the name of the library.  For backwards compatibility,
-    /// the `output` may start with `lib` and end with `.a`.  The Rust compilier will create
-    /// the assembly with the lib prefix and .a extension.  MSVC will create a file without prefix,
-    /// ending with `.lib`.
-    ///
-    /// # Panics
-    ///
-    /// Panics if `output` is not formatted correctly or if one of the underlying
-    /// compiler commands fails. It can also panic if it fails reading file names
-    /// or creating directories.
-    pub fn compile(&self, output: &str) {
-        if let Err(e) = self.try_compile(output) {
-            fail(&e.message);
-        }
-    }
-
-    #[cfg(feature = "parallel")]
-    fn compile_objects(&self, objs: &[(PathBuf, PathBuf)]) -> Result<(), Error> {
-        use self::rayon::prelude::*;
-
-        let mut cfg = rayon::Configuration::new();
-        if let Ok(amt) = env::var("NUM_JOBS") {
-            if let Ok(amt) = amt.parse() {
-                cfg = cfg.num_threads(amt);
-            }
-        }
-        drop(rayon::initialize(cfg));
-
-        let results: Mutex<Vec<Result<(), Error>>> = Mutex::new(Vec::new());
-
-        objs.par_iter().with_max_len(1)
-            .for_each(|&(ref src, ref dst)| results.lock().unwrap().push(self.compile_object(src, dst)));
-
-        // Check for any errors and return the first one found.
-        for result in results.into_inner().unwrap().iter() {
-            if result.is_err() {
-                return result.clone();
-            }
-        }
-
-        Ok(())
-    }
-
-    #[cfg(not(feature = "parallel"))]
-    fn compile_objects(&self, objs: &[(PathBuf, PathBuf)]) -> Result<(), Error> {
-        for &(ref src, ref dst) in objs {
-            self.compile_object(src, dst)?;
-        }
-        Ok(())
-    }
-
-    fn compile_object(&self, file: &Path, dst: &Path) -> Result<(), Error> {
-        let is_asm = file.extension().and_then(|s| s.to_str()) == Some("asm");
-        let msvc = self.get_target()?.contains("msvc");
-        let (mut cmd, name) = if msvc && is_asm {
-            self.msvc_macro_assembler()?
-        } else {
-            let compiler = self.try_get_compiler()?;
-            let mut cmd = compiler.to_command();
-            for &(ref a, ref b) in self.env.iter() {
-                cmd.env(a, b);
-            }
-            (cmd,
-             compiler.path
-                 .file_name()
-                 .ok_or_else(|| Error::new(ErrorKind::IOError, "Failed to get compiler path."))?
-                 .to_string_lossy()
-                 .into_owned())
-        };
-        command_add_output_file(&mut cmd, dst, msvc, is_asm);
-        cmd.arg(if msvc { "/c" } else { "-c" });
-        cmd.arg(file);
-
-        run(&mut cmd, &name)?;
-        Ok(())
-    }
-
-    /// This will return a result instead of panicing; see expand() for the complete description.
-    pub fn try_expand(&self) -> Result<Vec<u8>, Error> {
-        let compiler = self.try_get_compiler()?;
-        let mut cmd = compiler.to_command();
-        for &(ref a, ref b) in self.env.iter() {
-            cmd.env(a, b);
-        }
-        cmd.arg(compiler.family.expand_flag());
-
-        assert!(self.files.len() <= 1,
-                "Expand may only be called for a single file");
-
-        for file in self.files.iter() {
-            cmd.arg(file);
-        }
-
-        let name = compiler.path
-            .file_name()
-            .ok_or_else(|| Error::new(ErrorKind::IOError, "Failed to get compiler path."))?
-            .to_string_lossy()
-            .into_owned();
-
-        Ok(run_output(&mut cmd, &name)?)
-    }
-
-    /// Run the compiler, returning the macro-expanded version of the input files.
-    ///
-    /// This is only relevant for C and C++ files.
-    ///
-    /// # Panics
-    /// Panics if more than one file is present in the config, or if compiler
-    /// path has an invalid file name.
-    ///
-    /// # Example
-    /// ```no_run
-    /// let out = gcc::Build::new()
-    ///                       .file("src/foo.c")
-    ///                       .expand();
-    /// ```
-    pub fn expand(&self) -> Vec<u8> {
-        match self.try_expand() {
-            Err(e) => fail(&e.message),
-            Ok(v) => v,
-        }
-    }
-
-    /// Get the compiler that's in use for this configuration.
-    ///
-    /// This function will return a `Tool` which represents the culmination
-    /// of this configuration at a snapshot in time. The returned compiler can
-    /// be inspected (e.g. the path, arguments, environment) to forward along to
-    /// other tools, or the `to_command` method can be used to invoke the
-    /// compiler itself.
-    ///
-    /// This method will take into account all configuration such as debug
-    /// information, optimization level, include directories, defines, etc.
-    /// Additionally, the compiler binary in use follows the standard
-    /// conventions for this path, e.g. looking at the explicitly set compiler,
-    /// environment variables (a number of which are inspected here), and then
-    /// falling back to the default configuration.
-    ///
-    /// # Panics
-    ///
-    /// Panics if an error occurred while determining the architecture.
-    pub fn get_compiler(&self) -> Tool {
-        match self.try_get_compiler() {
-            Ok(tool) => tool,
-            Err(e) => fail(&e.message),
-        }
-    }
-
-    /// Get the compiler that's in use for this configuration.
-    ///
-    /// This will return a result instead of panicing; see get_compiler() for the complete description.
-    pub fn try_get_compiler(&self) -> Result<Tool, Error> {
-        let opt_level = self.get_opt_level()?;
-        let target = self.get_target()?;
-
-        let mut cmd = self.get_base_compiler()?;
-        let nvcc = cmd.path.file_name()
-            .and_then(|p| p.to_str()).map(|p| p.contains("nvcc"))
-            .unwrap_or(false);
-
-        // Non-target flags
-        // If the flag is not conditioned on target variable, it belongs here :)
-        match cmd.family {
-            ToolFamily::Msvc => {
-                cmd.args.push("/nologo".into());
-
-                let crt_flag = match self.static_crt {
-                    Some(true) => "/MT",
-                    Some(false) => "/MD",
-                    None => {
-                        let features = env::var("CARGO_CFG_TARGET_FEATURE")
-                                  .unwrap_or(String::new());
-                        if features.contains("crt-static") {
-                            "/MT"
-                        } else {
-                            "/MD"
-                        }
-                    },
-                };
-                cmd.args.push(crt_flag.into());
-
-                match &opt_level[..] {
-                    "z" | "s" => cmd.args.push("/Os".into()),
-                    "1" => cmd.args.push("/O1".into()),
-                    // -O3 is a valid value for gcc and clang compilers, but not msvc. Cap to /O2.
-                    "2" | "3" => cmd.args.push("/O2".into()),
-                    _ => {}
-                }
-            }
-            ToolFamily::Gnu |
-            ToolFamily::Clang => {
-                // arm-linux-androideabi-gcc 4.8 shipped with Android NDK does
-                // not support '-Oz'
-                if opt_level == "z" && cmd.family != ToolFamily::Clang {
-                    cmd.args.push("-Os".into());
-                } else {
-                    cmd.args.push(format!("-O{}", opt_level).into());
-                }
-
-                if !nvcc {
-                    cmd.args.push("-ffunction-sections".into());
-                    cmd.args.push("-fdata-sections".into());
-                    if self.pic.unwrap_or(!target.contains("windows-gnu")) {
-                        cmd.args.push("-fPIC".into());
-                    }
-                } else if self.pic.unwrap_or(false) {
-                    cmd.args.push("-Xcompiler".into());
-                    cmd.args.push("\'-fPIC\'".into());
-                }
-            }
-        }
-        for arg in self.envflags(if self.cpp {"CXXFLAGS"} else {"CFLAGS"}) {
-            cmd.args.push(arg.into());
-        }
-
-        if self.get_debug() {
-            cmd.args.push(cmd.family.debug_flag().into());
-        }
-
-        // Target flags
-        match cmd.family {
-            ToolFamily::Clang => {
-                cmd.args.push(format!("--target={}", target).into());
-            }
-            ToolFamily::Msvc => {
-                if target.contains("i586") {
-                    cmd.args.push("/ARCH:IA32".into());
-                }
-            }
-            ToolFamily::Gnu => {
-                if target.contains("i686") || target.contains("i586") {
-                    cmd.args.push("-m32".into());
-                } else if target.contains("x86_64") || target.contains("powerpc64") {
-                    cmd.args.push("-m64".into());
-                }
-
-                if self.static_flag.is_none() && target.contains("musl") {
-                    cmd.args.push("-static".into());
-                }
-
-                // armv7 targets get to use armv7 instructions
-                if target.starts_with("armv7-") && target.contains("-linux-") {
-                    cmd.args.push("-march=armv7-a".into());
-                }
-
-                // On android we can guarantee some extra float instructions
-                // (specified in the android spec online)
-                if target.starts_with("armv7-linux-androideabi") {
-                    cmd.args.push("-march=armv7-a".into());
-                    cmd.args.push("-mfpu=vfpv3-d16".into());
-                    cmd.args.push("-mfloat-abi=softfp".into());
-                }
-
-                // For us arm == armv6 by default
-                if target.starts_with("arm-unknown-linux-") {
-                    cmd.args.push("-march=armv6".into());
-                    cmd.args.push("-marm".into());
-                }
-
-                // We can guarantee some settings for FRC
-                if target.starts_with("arm-frc-") {
-                    cmd.args.push("-march=armv7-a".into());
-                    cmd.args.push("-mcpu=cortex-a9".into());
-                    cmd.args.push("-mfpu=vfpv3".into());
-                    cmd.args.push("-mfloat-abi=softfp".into());
-                    cmd.args.push("-marm".into());
-                }
-
-                // Turn codegen down on i586 to avoid some instructions.
-                if target.starts_with("i586-unknown-linux-") {
-                    cmd.args.push("-march=pentium".into());
-                }
-
-                // Set codegen level for i686 correctly
-                if target.starts_with("i686-unknown-linux-") {
-                    cmd.args.push("-march=i686".into());
-                }
-
-                // Looks like `musl-gcc` makes is hard for `-m32` to make its way
-                // all the way to the linker, so we need to actually instruct the
-                // linker that we're generating 32-bit executables as well. This'll
-                // typically only be used for build scripts which transitively use
-                // these flags that try to compile executables.
-                if target == "i686-unknown-linux-musl" {
-                    cmd.args.push("-Wl,-melf_i386".into());
-                }
-
-                if target.starts_with("thumb") {
-                    cmd.args.push("-mthumb".into());
-
-                    if target.ends_with("eabihf") {
-                        cmd.args.push("-mfloat-abi=hard".into())
-                    }
-                }
-                if target.starts_with("thumbv6m") {
-                    cmd.args.push("-march=armv6s-m".into());
-                }
-                if target.starts_with("thumbv7em") {
-                    cmd.args.push("-march=armv7e-m".into());
-
-                    if target.ends_with("eabihf") {
-                        cmd.args.push("-mfpu=fpv4-sp-d16".into())
-                    }
-                }
-                if target.starts_with("thumbv7m") {
-                    cmd.args.push("-march=armv7-m".into());
-                }
-            }
-        }
-
-        if target.contains("-ios") {
-            // FIXME: potential bug. iOS is always compiled with Clang, but Gcc compiler may be
-            // detected instead.
-            self.ios_flags(&mut cmd)?;
-        }
-
-        if self.static_flag.unwrap_or(false) {
-            cmd.args.push("-static".into());
-        }
-        if self.shared_flag.unwrap_or(false) {
-            cmd.args.push("-shared".into());
-        }
-
-        if self.cpp {
-            match (self.cpp_set_stdlib.as_ref(), cmd.family) {
-                (None, _) => { }
-                (Some(stdlib), ToolFamily::Gnu) |
-                (Some(stdlib), ToolFamily::Clang) => {
-                    cmd.args.push(format!("-stdlib=lib{}", stdlib).into());
-                }
-                _ => {
-                    println!("cargo:warning=cpp_set_stdlib is specified, but the {:?} compiler \
-                              does not support this option, ignored", cmd.family);
-                }
-            }
-        }
-
-        for directory in self.include_directories.iter() {
-            cmd.args.push(cmd.family.include_flag().into());
-            cmd.args.push(directory.into());
-        }
-
-        for flag in self.flags.iter() {
-            cmd.args.push(flag.into());
-        }
-
-        for flag in self.flags_supported.iter() {
-            if self.is_flag_supported(flag).unwrap_or(false) {
-                cmd.args.push(flag.into());
-            }
-        }
-
-        for &(ref key, ref value) in self.definitions.iter() {
-            let lead = if let ToolFamily::Msvc = cmd.family {"/"} else {"-"};
-            if let Some(ref value) = *value {
-                cmd.args.push(format!("{}D{}={}", lead, key, value).into());
-            } else {
-                cmd.args.push(format!("{}D{}", lead, key).into());
-            }
-        }
-
-        if self.warnings {
-            for flag in cmd.family.warnings_flags().iter() {
-                cmd.args.push(flag.into());
-            }
-        }
-
-        if self.warnings_into_errors {
-            cmd.args.push(cmd.family.warnings_to_errors_flag().into());
-        }
-
-        Ok(cmd)
-    }
-
-    fn msvc_macro_assembler(&self) -> Result<(Command, String), Error> {
-        let target = self.get_target()?;
-        let tool = if target.contains("x86_64") {
-            "ml64.exe"
-        } else {
-            "ml.exe"
-        };
-        let mut cmd = windows_registry::find(&target, tool).unwrap_or_else(|| self.cmd(tool));
-        for directory in self.include_directories.iter() {
-            cmd.arg("/I").arg(directory);
-        }
-        for &(ref key, ref value) in self.definitions.iter() {
-            if let Some(ref value) = *value {
-                cmd.arg(&format!("/D{}={}", key, value));
-            } else {
-                cmd.arg(&format!("/D{}", key));
-            }
-        }
-
-        if target.contains("i686") || target.contains("i586") {
-            cmd.arg("/safeseh");
-        }
-        for flag in self.flags.iter() {
-            cmd.arg(flag);
-        }
-
-        Ok((cmd, tool.to_string()))
-    }
-
-    fn assemble(&self, lib_name: &str, dst: &Path, objects: &[PathBuf]) -> Result<(), Error> {
-        // Delete the destination if it exists as the `ar` tool at least on Unix
-        // appends to it, which we don't want.
-        let _ = fs::remove_file(&dst);
-
-        let target = self.get_target()?;
-        if target.contains("msvc") {
-            let mut cmd = match self.archiver {
-                Some(ref s) => self.cmd(s),
-                None => windows_registry::find(&target, "lib.exe").unwrap_or_else(|| self.cmd("lib.exe")),
-            };
-            let mut out = OsString::from("/OUT:");
-            out.push(dst);
-            run(cmd.arg(out)
-                    .arg("/nologo")
-                    .args(objects)
-                    .args(&self.objects),
-                "lib.exe")?;
-
-            // The Rust compiler will look for libfoo.a and foo.lib, but the
-            // MSVC linker will also be passed foo.lib, so be sure that both
-            // exist for now.
-            let lib_dst = dst.with_file_name(format!("{}.lib", lib_name));
-            let _ = fs::remove_file(&lib_dst);
-            match fs::hard_link(&dst, &lib_dst)
-                .or_else(|_| {
-                    // if hard-link fails, just copy (ignoring the number of bytes written)
-                    fs::copy(&dst, &lib_dst).map(|_| ())
-                }) {
-                Ok(_) => (),
-                Err(_) => return Err(Error::new(ErrorKind::IOError, "Could not copy or create a hard-link to the generated lib file.")),
-            };
-        } else {
-            let ar = self.get_ar()?;
-            let cmd = ar.file_name()
-                .ok_or_else(|| Error::new(ErrorKind::IOError, "Failed to get archiver (ar) path."))?
-                .to_string_lossy();
-            run(self.cmd(&ar)
-                    .arg("crs")
-                    .arg(dst)
-                    .args(objects)
-                    .args(&self.objects),
-                &cmd)?;
-        }
-
-        Ok(())
-    }
-
-    fn ios_flags(&self, cmd: &mut Tool) -> Result<(), Error> {
-        enum ArchSpec {
-            Device(&'static str),
-            Simulator(&'static str),
-        }
-
-        let target = self.get_target()?;
-        let arch = target.split('-').nth(0).ok_or_else(|| Error::new(ErrorKind::ArchitectureInvalid, "Unknown architecture for iOS target."))?;
-        let arch = match arch {
-            "arm" | "armv7" | "thumbv7" => ArchSpec::Device("armv7"),
-            "armv7s" | "thumbv7s" => ArchSpec::Device("armv7s"),
-            "arm64" | "aarch64" => ArchSpec::Device("arm64"),
-            "i386" | "i686" => ArchSpec::Simulator("-m32"),
-            "x86_64" => ArchSpec::Simulator("-m64"),
-            _ => return Err(Error::new(ErrorKind::ArchitectureInvalid, "Unknown architecture for iOS target.")),
-        };
-
-        let sdk = match arch {
-            ArchSpec::Device(arch) => {
-                cmd.args.push("-arch".into());
-                cmd.args.push(arch.into());
-                cmd.args.push("-miphoneos-version-min=7.0".into());
-                "iphoneos"
-            }
-            ArchSpec::Simulator(arch) => {
-                cmd.args.push(arch.into());
-                cmd.args.push("-mios-simulator-version-min=7.0".into());
-                "iphonesimulator"
-            }
-        };
-
-        self.print(&format!("Detecting iOS SDK path for {}", sdk));
-        let sdk_path = self.cmd("xcrun")
-            .arg("--show-sdk-path")
-            .arg("--sdk")
-            .arg(sdk)
-            .stderr(Stdio::inherit())
-            .output()?
-            .stdout;
-
-        let sdk_path = match String::from_utf8(sdk_path) {
-            Ok(p) => p,
-            Err(_) => return Err(Error::new(ErrorKind::IOError, "Unable to determine iOS SDK path.")),
-        };
-
-        cmd.args.push("-isysroot".into());
-        cmd.args.push(sdk_path.trim().into());
-
-        Ok(())
-    }
-
-    fn cmd<P: AsRef<OsStr>>(&self, prog: P) -> Command {
-        let mut cmd = Command::new(prog);
-        for &(ref a, ref b) in self.env.iter() {
-            cmd.env(a, b);
-        }
-        cmd
-    }
-
-    fn get_base_compiler(&self) -> Result<Tool, Error> {
-        if let Some(ref c) = self.compiler {
-            return Ok(Tool::new(c.clone()));
-        }
-        let host = self.get_host()?;
-        let target = self.get_target()?;
-        let (env, msvc, gnu) = if self.cpp {
-            ("CXX", "cl.exe", "g++")
-        } else {
-            ("CC", "cl.exe", "gcc")
-        };
-
-        let default = if host.contains("solaris") {
-            // In this case, c++/cc unlikely to exist or be correct.
-            gnu
-        } else if self.cpp {
-            "c++"
-        } else {
-            "cc"
-        };
-
-        let tool_opt: Option<Tool> = self.env_tool(env)
-            .map(|(tool, args)| {
-                let mut t = Tool::new(PathBuf::from(tool));
-                for arg in args {
-                    t.args.push(arg.into());
-                }
-                t
-            })
-            .or_else(|| {
-                if target.contains("emscripten") {
-                    let tool = if self.cpp {
-                        "em++"
-                    } else {
-                        "emcc"
-                    };
-                    // Windows uses bat file so we have to be a bit more specific
-                    if cfg!(windows) {
-                        let mut t = Tool::new(PathBuf::from("cmd"));
-                        t.args.push("/c".into());
-                        t.args.push(format!("{}.bat", tool).into());
-                        Some(t)
-                    } else {
-                        Some(Tool::new(PathBuf::from(tool)))
-                    }
-                } else {
-                    None
-                }
-            })
-            .or_else(|| windows_registry::find_tool(&target, "cl.exe"));
-
-        let tool = match tool_opt {
-            Some(t) => t,
-            None => {
-                let compiler = if host.contains("windows") && target.contains("windows") {
-                    if target.contains("msvc") {
-                        msvc.to_string()
-                    } else {
-                        format!("{}.exe", gnu)
-                    }
-                } else if target.contains("android") {
-                    format!("{}-{}", target.replace("armv7", "arm"), gnu)
-                } else if self.get_host()? != target {
-                    // CROSS_COMPILE is of the form: "arm-linux-gnueabi-"
-                    let cc_env = self.getenv("CROSS_COMPILE");
-                    let cross_compile = cc_env.as_ref().map(|s| s.trim_right_matches('-'));
-                    let prefix = cross_compile.or(match &target[..] {
-                        "aarch64-unknown-linux-gnu" => Some("aarch64-linux-gnu"),
-                        "arm-unknown-linux-gnueabi" => Some("arm-linux-gnueabi"),
-                        "arm-frc-linux-gnueabi" => Some("arm-frc-linux-gnueabi"),
-                        "arm-unknown-linux-gnueabihf" => Some("arm-linux-gnueabihf"),
-                        "arm-unknown-linux-musleabi" => Some("arm-linux-musleabi"),
-                        "arm-unknown-linux-musleabihf" => Some("arm-linux-musleabihf"),
-                        "arm-unknown-netbsd-eabi" => Some("arm--netbsdelf-eabi"),
-                        "armv6-unknown-netbsd-eabihf" => Some("armv6--netbsdelf-eabihf"),
-                        "armv7-unknown-linux-gnueabihf" => Some("arm-linux-gnueabihf"),
-                        "armv7-unknown-linux-musleabihf" => Some("arm-linux-musleabihf"),
-                        "armv7-unknown-netbsd-eabihf" => Some("armv7--netbsdelf-eabihf"),
-                        "i686-pc-windows-gnu" => Some("i686-w64-mingw32"),
-                        "i686-unknown-linux-musl" => Some("musl"),
-                        "i686-unknown-netbsd" => Some("i486--netbsdelf"),
-                        "mips-unknown-linux-gnu" => Some("mips-linux-gnu"),
-                        "mipsel-unknown-linux-gnu" => Some("mipsel-linux-gnu"),
-                        "mips64-unknown-linux-gnuabi64" => Some("mips64-linux-gnuabi64"),
-                        "mips64el-unknown-linux-gnuabi64" => Some("mips64el-linux-gnuabi64"),
-                        "powerpc-unknown-linux-gnu" => Some("powerpc-linux-gnu"),
-                        "powerpc-unknown-netbsd" => Some("powerpc--netbsd"),
-                        "powerpc64-unknown-linux-gnu" => Some("powerpc-linux-gnu"),
-                        "powerpc64le-unknown-linux-gnu" => Some("powerpc64le-linux-gnu"),
-                        "s390x-unknown-linux-gnu" => Some("s390x-linux-gnu"),
-                        "sparc64-unknown-netbsd" => Some("sparc64--netbsd"),
-                        "sparcv9-sun-solaris" => Some("sparcv9-sun-solaris"),
-                        "thumbv6m-none-eabi" => Some("arm-none-eabi"),
-                        "thumbv7em-none-eabi" => Some("arm-none-eabi"),
-                        "thumbv7em-none-eabihf" => Some("arm-none-eabi"),
-                        "thumbv7m-none-eabi" => Some("arm-none-eabi"),
-                        "x86_64-pc-windows-gnu" => Some("x86_64-w64-mingw32"),
-                        "x86_64-rumprun-netbsd" => Some("x86_64-rumprun-netbsd"),
-                        "x86_64-unknown-linux-musl" => Some("musl"),
-                        "x86_64-unknown-netbsd" => Some("x86_64--netbsd"),
-                        _ => None,
-                    });
-                    match prefix {
-                        Some(prefix) => format!("{}-{}", prefix, gnu),
-                        None => default.to_string(),
-                    }
-                } else {
-                    default.to_string()
-                };
-                Tool::new(PathBuf::from(compiler))
-            }
-        };
-
-        Ok(tool)
-    }
-
-    fn get_var(&self, var_base: &str) -> Result<String, Error> {
-        let target = self.get_target()?;
-        let host = self.get_host()?;
-        let kind = if host == target { "HOST" } else { "TARGET" };
-        let target_u = target.replace("-", "_");
-        let res = self.getenv(&format!("{}_{}", var_base, target))
-            .or_else(|| self.getenv(&format!("{}_{}", var_base, target_u)))
-            .or_else(|| self.getenv(&format!("{}_{}", kind, var_base)))
-            .or_else(|| self.getenv(var_base));
-
-        match res {
-            Some(res) => Ok(res),
-            None => Err(Error::new(ErrorKind::EnvVarNotFound, &format!("Could not find environment variable {}.", var_base))),
-        }
-    }
-
-    fn envflags(&self, name: &str) -> Vec<String> {
-        self.get_var(name)
-            .unwrap_or(String::new())
-            .split(|c: char| c.is_whitespace())
-            .filter(|s| !s.is_empty())
-            .map(|s| s.to_string())
-            .collect()
-    }
-
-    fn env_tool(&self, name: &str) -> Option<(String, Vec<String>)> {
-        self.get_var(name).ok().map(|tool| {
-            let whitelist = ["ccache", "distcc", "sccache"];
-            for t in whitelist.iter() {
-                if tool.starts_with(t) && tool[t.len()..].starts_with(' ') {
-                    return (t.to_string(), vec![tool[t.len()..].trim_left().to_string()]);
-                }
-            }
-            (tool, Vec::new())
-        })
-    }
-
-    /// Returns the default C++ standard library for the current target: `libc++`
-    /// for OS X and `libstdc++` for anything else.
-    fn get_cpp_link_stdlib(&self) -> Result<Option<String>, Error> {
-        match self.cpp_link_stdlib.clone() {
-            Some(s) => Ok(s),
-            None => {
-                let target = self.get_target()?;
-                if target.contains("msvc") {
-                    Ok(None)
-                } else if target.contains("darwin") {
-                    Ok(Some("c++".to_string()))
-                } else if target.contains("freebsd") {
-                    Ok(Some("c++".to_string()))
-                } else {
-                    Ok(Some("stdc++".to_string()))
-                }
-            },
-        }
-    }
-
-    fn get_ar(&self) -> Result<PathBuf, Error> {
-        match self.archiver
-            .clone()
-            .or_else(|| self.get_var("AR").map(PathBuf::from).ok()) {
-                Some(p) => Ok(p),
-                None => {
-                    if self.get_target()?.contains("android") {
-                        Ok(PathBuf::from(format!("{}-ar", self.get_target()?.replace("armv7", "arm"))))
-                    } else if self.get_target()?.contains("emscripten") {
-                        //Windows use bat files so we have to be a bit more specific
-                        let tool = if cfg!(windows) {
-                            "emar.bat"
-                        } else {
-                            "emar"
-                        };
-
-                        Ok(PathBuf::from(tool))
-                    } else {
-                        Ok(PathBuf::from("ar"))
-                    }
-                }
-            }
-    }
-
-    fn get_target(&self) -> Result<String, Error> {
-        match self.target.clone() {
-            Some(t) => Ok(t),
-            None => Ok(self.getenv_unwrap("TARGET")?),
-        }
-    }
-
-    fn get_host(&self) -> Result<String, Error> {
-        match self.host.clone() {
-            Some(h) => Ok(h),
-            None => Ok(self.getenv_unwrap("HOST")?),
-        }
-    }
-
-    fn get_opt_level(&self) -> Result<String, Error> {
-        match self.opt_level.as_ref().cloned() {
-            Some(ol) => Ok(ol),
-            None => Ok(self.getenv_unwrap("OPT_LEVEL")?),
-        }
-    }
-
-    fn get_debug(&self) -> bool {
-        self.debug.unwrap_or_else(|| {
-            match self.getenv("DEBUG") {
-                Some(s) => s != "false",
-                None => false,
-            }
-        })
-    }
-
-    fn get_out_dir(&self) -> Result<PathBuf, Error> {
-        match self.out_dir.clone() {
-            Some(p) => Ok(p),
-            None => Ok(env::var_os("OUT_DIR")
-                .map(PathBuf::from)
-                .ok_or_else(|| Error::new(ErrorKind::EnvVarNotFound, "Environment variable OUT_DIR not defined."))?),
-        }
-    }
-
-    fn getenv(&self, v: &str) -> Option<String> {
-        let r = env::var(v).ok();
-        self.print(&format!("{} = {:?}", v, r));
-        r
-    }
-
-    fn getenv_unwrap(&self, v: &str) -> Result<String, Error> {
-        match self.getenv(v) {
-            Some(s) => Ok(s),
-            None => Err(Error::new(ErrorKind::EnvVarNotFound, &format!("Environment variable {} not defined.", v.to_string()))),
-        }
-    }
-
-    fn print(&self, s: &str) {
-        if self.cargo_metadata {
-            println!("{}", s);
-        }
-    }
-}
-
-impl Default for Build {
-    fn default() -> Build {
-        Build::new()
-    }
-}
-
-impl Tool {
-    fn new(path: PathBuf) -> Tool {
-        // Try to detect family of the tool from its name, falling back to Gnu.
-        let family = if let Some(fname) = path.file_name().and_then(|p| p.to_str()) {
-            if fname.contains("clang") {
-                ToolFamily::Clang
-            } else if fname.contains("cl") && !fname.contains("uclibc") {
-                ToolFamily::Msvc
-            } else {
-                ToolFamily::Gnu
-            }
-        } else {
-            ToolFamily::Gnu
-        };
-        Tool {
-            path: path,
-            args: Vec::new(),
-            env: Vec::new(),
-            family: family
-        }
-    }
-
-    /// Converts this compiler into a `Command` that's ready to be run.
-    ///
-    /// This is useful for when the compiler needs to be executed and the
-    /// command returned will already have the initial arguments and environment
-    /// variables configured.
-    pub fn to_command(&self) -> Command {
-        let mut cmd = Command::new(&self.path);
-        cmd.args(&self.args);
-        for &(ref k, ref v) in self.env.iter() {
-            cmd.env(k, v);
-        }
-        cmd
-    }
-
-    /// Returns the path for this compiler.
-    ///
-    /// Note that this may not be a path to a file on the filesystem, e.g. "cc",
-    /// but rather something which will be resolved when a process is spawned.
-    pub fn path(&self) -> &Path {
-        &self.path
-    }
-
-    /// Returns the default set of arguments to the compiler needed to produce
-    /// executables for the target this compiler generates.
-    pub fn args(&self) -> &[OsString] {
-        &self.args
-    }
-
-    /// Returns the set of environment variables needed for this compiler to
-    /// operate.
-    ///
-    /// This is typically only used for MSVC compilers currently.
-    pub fn env(&self) -> &[(OsString, OsString)] {
-        &self.env
-    }
-}
-
-fn run(cmd: &mut Command, program: &str) -> Result<(), Error> {
-    let (mut child, print) = spawn(cmd, program)?;
-    let status = match child.wait() {
-        Ok(s) => s,
-        Err(_) => return Err(Error::new(ErrorKind::ToolExecError, &format!("Failed to wait on spawned child process, command {:?} with args {:?}.", cmd, program))),
-    };
-    print.join().unwrap();
-    println!("{}", status);
-
-    if status.success() {
-        Ok(())
-    } else {
-        Err(Error::new(ErrorKind::ToolExecError, &format!("Command {:?} with args {:?} did not execute successfully (status code {}).", cmd, program, status)))
-    }
-}
-
-fn run_output(cmd: &mut Command, program: &str) -> Result<Vec<u8>, Error> {
-    cmd.stdout(Stdio::piped());
-    let (mut child, print) = spawn(cmd, program)?;
-    let mut stdout = vec![];
-    child.stdout.take().unwrap().read_to_end(&mut stdout).unwrap();
-    let status = match child.wait() {
-        Ok(s) => s,
-        Err(_) => return Err(Error::new(ErrorKind::ToolExecError, &format!("Failed to wait on spawned child process, command {:?} with args {:?}.", cmd, program))),
-    };
-    print.join().unwrap();
-    println!("{}", status);
-
-    if status.success() {
-        Ok(stdout)
-    } else {
-        Err(Error::new(ErrorKind::ToolExecError, &format!("Command {:?} with args {:?} did not execute successfully (status code {}).", cmd, program, status)))
-    }
-}
-
-fn spawn(cmd: &mut Command, program: &str) -> Result<(Child, JoinHandle<()>), Error> {
-    println!("running: {:?}", cmd);
-
-    // Capture the standard error coming from these programs, and write it out
-    // with cargo:warning= prefixes. Note that this is a bit wonky to avoid
-    // requiring the output to be UTF-8, we instead just ship bytes from one
-    // location to another.
-    match cmd.stderr(Stdio::piped()).spawn() {
-        Ok(mut child) => {
-            let stderr = BufReader::new(child.stderr.take().unwrap());
-            let print = thread::spawn(move || {
-                for line in stderr.split(b'\n').filter_map(|l| l.ok()) {
-                    print!("cargo:warning=");
-                    std::io::stdout().write_all(&line).unwrap();
-                    println!("");
-                }
-            });
-            Ok((child, print))
-        }
-        Err(ref e) if e.kind() == io::ErrorKind::NotFound => {
-            let extra = if cfg!(windows) {
-                " (see https://github.com/alexcrichton/gcc-rs#compile-time-requirements \
-                   for help)"
-            } else {
-                ""
-            };
-            Err(Error::new(ErrorKind::ToolNotFound, &format!("Failed to find tool. Is `{}` installed?{}", program, extra)))
-        }
-        Err(_) => Err(Error::new(ErrorKind::ToolExecError, &format!("Command {:?} with args {:?} failed to start.", cmd, program))),
-    }
-}
-
-fn fail(s: &str) -> ! {
-    panic!("\n\nInternal error occurred: {}\n\n", s)
-}
-
-
-fn command_add_output_file(cmd: &mut Command, dst: &Path, msvc: bool, is_asm: bool) {
-    if msvc && is_asm {
-        cmd.arg("/Fo").arg(dst);
-    } else if msvc {
-        let mut s = OsString::from("/Fo");
-        s.push(&dst);
-        cmd.arg(s);
-    } else {
-        cmd.arg("-o").arg(&dst);
-    }
-}
diff --git a/gcc/src/registry.rs b/gcc/src/registry.rs
deleted file mode 100644
index a452723..0000000
--- a/gcc/src/registry.rs
+++ /dev/null
@@ -1,190 +0,0 @@
-// Copyright 2015 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 std::ffi::{OsString, OsStr};
-use std::io;
-use std::ops::RangeFrom;
-use std::os::raw;
-use std::os::windows::prelude::*;
-
-pub struct RegistryKey(Repr);
-
-type HKEY = *mut u8;
-type DWORD = u32;
-type LPDWORD = *mut DWORD;
-type LPCWSTR = *const u16;
-type LPWSTR = *mut u16;
-type LONG = raw::c_long;
-type PHKEY = *mut HKEY;
-type PFILETIME = *mut u8;
-type LPBYTE = *mut u8;
-type REGSAM = u32;
-
-const ERROR_SUCCESS: DWORD = 0;
-const ERROR_NO_MORE_ITEMS: DWORD = 259;
-const HKEY_LOCAL_MACHINE: HKEY = 0x80000002 as HKEY;
-const REG_SZ: DWORD = 1;
-const KEY_READ: DWORD = 0x20019;
-const KEY_WOW64_32KEY: DWORD = 0x200;
-
-#[link(name = "advapi32")]
-extern "system" {
-    fn RegOpenKeyExW(key: HKEY,
-                     lpSubKey: LPCWSTR,
-                     ulOptions: DWORD,
-                     samDesired: REGSAM,
-                     phkResult: PHKEY)
-                     -> LONG;
-    fn RegEnumKeyExW(key: HKEY,
-                     dwIndex: DWORD,
-                     lpName: LPWSTR,
-                     lpcName: LPDWORD,
-                     lpReserved: LPDWORD,
-                     lpClass: LPWSTR,
-                     lpcClass: LPDWORD,
-                     lpftLastWriteTime: PFILETIME)
-                     -> LONG;
-    fn RegQueryValueExW(hKey: HKEY,
-                        lpValueName: LPCWSTR,
-                        lpReserved: LPDWORD,
-                        lpType: LPDWORD,
-                        lpData: LPBYTE,
-                        lpcbData: LPDWORD)
-                        -> LONG;
-    fn RegCloseKey(hKey: HKEY) -> LONG;
-}
-
-struct OwnedKey(HKEY);
-
-enum Repr {
-    Const(HKEY),
-    Owned(OwnedKey),
-}
-
-pub struct Iter<'a> {
-    idx: RangeFrom<DWORD>,
-    key: &'a RegistryKey,
-}
-
-unsafe impl Sync for Repr {}
-unsafe impl Send for Repr {}
-
-pub static LOCAL_MACHINE: RegistryKey = RegistryKey(Repr::Const(HKEY_LOCAL_MACHINE));
-
-impl RegistryKey {
-    fn raw(&self) -> HKEY {
-        match self.0 {
-            Repr::Const(val) => val,
-            Repr::Owned(ref val) => val.0,
-        }
-    }
-
-    pub fn open(&self, key: &OsStr) -> io::Result<RegistryKey> {
-        let key = key.encode_wide().chain(Some(0)).collect::<Vec<_>>();
-        let mut ret = 0 as *mut _;
-        let err = unsafe {
-            RegOpenKeyExW(self.raw(),
-                          key.as_ptr(),
-                          0,
-                          KEY_READ | KEY_WOW64_32KEY,
-                          &mut ret)
-        };
-        if err == ERROR_SUCCESS as LONG {
-            Ok(RegistryKey(Repr::Owned(OwnedKey(ret))))
-        } else {
-            Err(io::Error::from_raw_os_error(err as i32))
-        }
-    }
-
-    pub fn iter(&self) -> Iter {
-        Iter {
-            idx: 0..,
-            key: self,
-        }
-    }
-
-    pub fn query_str(&self, name: &str) -> io::Result<OsString> {
-        let name: &OsStr = name.as_ref();
-        let name = name.encode_wide().chain(Some(0)).collect::<Vec<_>>();
-        let mut len = 0;
-        let mut kind = 0;
-        unsafe {
-            let err = RegQueryValueExW(self.raw(),
-                                       name.as_ptr(),
-                                       0 as *mut _,
-                                       &mut kind,
-                                       0 as *mut _,
-                                       &mut len);
-            if err != ERROR_SUCCESS as LONG {
-                return Err(io::Error::from_raw_os_error(err as i32));
-            }
-            if kind != REG_SZ {
-                return Err(io::Error::new(io::ErrorKind::Other, "registry key wasn't a string"));
-            }
-
-            // The length here is the length in bytes, but we're using wide
-            // characters so we need to be sure to halve it for the capacity
-            // passed in.
-            let mut v = Vec::with_capacity(len as usize / 2);
-            let err = RegQueryValueExW(self.raw(),
-                                       name.as_ptr(),
-                                       0 as *mut _,
-                                       0 as *mut _,
-                                       v.as_mut_ptr() as *mut _,
-                                       &mut len);
-            if err != ERROR_SUCCESS as LONG {
-                return Err(io::Error::from_raw_os_error(err as i32));
-            }
-            v.set_len(len as usize / 2);
-
-            // Some registry keys may have a terminating nul character, but
-            // we're not interested in that, so chop it off if it's there.
-            if v[v.len() - 1] == 0 {
-                v.pop();
-            }
-            Ok(OsString::from_wide(&v))
-        }
-    }
-}
-
-impl Drop for OwnedKey {
-    fn drop(&mut self) {
-        unsafe {
-            RegCloseKey(self.0);
-        }
-    }
-}
-
-impl<'a> Iterator for Iter<'a> {
-    type Item = io::Result<OsString>;
-
-    fn next(&mut self) -> Option<io::Result<OsString>> {
-        self.idx.next().and_then(|i| unsafe {
-            let mut v = Vec::with_capacity(256);
-            let mut len = v.capacity() as DWORD;
-            let ret = RegEnumKeyExW(self.key.raw(),
-                                    i,
-                                    v.as_mut_ptr(),
-                                    &mut len,
-                                    0 as *mut _,
-                                    0 as *mut _,
-                                    0 as *mut _,
-                                    0 as *mut _);
-            if ret == ERROR_NO_MORE_ITEMS as LONG {
-                None
-            } else if ret != ERROR_SUCCESS as LONG {
-                Some(Err(io::Error::from_raw_os_error(ret as i32)))
-            } else {
-                v.set_len(len as usize);
-                Some(Ok(OsString::from_wide(&v)))
-            }
-        })
-    }
-}
diff --git a/gcc/src/setup_config.rs b/gcc/src/setup_config.rs
deleted file mode 100644
index 175b7f1..0000000
--- a/gcc/src/setup_config.rs
+++ /dev/null
@@ -1,257 +0,0 @@
-// Copyright © 2017 winapi-rs developers
-// 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.
-// All files in the project carrying such notice may not be copied, modified, or distributed
-// except according to those terms.
-
-#![allow(bad_style)]
-#![allow(unused)]
-
-use std::ffi::OsString;
-use std::ptr::null_mut;
-use winapi::Interface;
-use winapi::{LPFILETIME, ULONG};
-use winapi::S_FALSE;
-use winapi::BSTR;
-use winapi::LPCOLESTR;
-use winapi::{CLSCTX_ALL, CoCreateInstance};
-use winapi::LPSAFEARRAY;
-use winapi::{IUnknown, IUnknownVtbl};
-use winapi::{HRESULT, LCID, LPCWSTR, PULONGLONG};
-
-use com::{BStr, ComPtr};
-
-// Bindings to the Setup.Configuration stuff
-pub type InstanceState = u32;
-
-pub const eNone: InstanceState = 0;
-pub const eLocal: InstanceState = 1;
-pub const eRegistered: InstanceState = 2;
-pub const eNoRebootRequired: InstanceState = 4;
-pub const eComplete: InstanceState = -1i32 as u32;
-
-RIDL!{#[uuid(0xb41463c3, 0x8866, 0x43b5, 0xbc, 0x33, 0x2b, 0x06, 0x76, 0xf7, 0xf4, 0x2e)]
-interface ISetupInstance(ISetupInstanceVtbl): IUnknown(IUnknownVtbl) {
-    fn GetInstanceId(
-        pbstrInstanceId: *mut BSTR,
-    ) -> HRESULT,
-    fn GetInstallDate(
-        pInstallDate: LPFILETIME,
-    ) -> HRESULT,
-    fn GetInstallationName(
-        pbstrInstallationName: *mut BSTR,
-    ) -> HRESULT,
-    fn GetInstallationPath(
-        pbstrInstallationPath: *mut BSTR,
-    ) -> HRESULT,
-    fn GetInstallationVersion(
-        pbstrInstallationVersion: *mut BSTR,
-    ) -> HRESULT,
-    fn GetDisplayName(
-        lcid: LCID,
-        pbstrDisplayName: *mut BSTR,
-    ) -> HRESULT,
-    fn GetDescription(
-        lcid: LCID,
-        pbstrDescription: *mut BSTR,
-    ) -> HRESULT,
-    fn ResolvePath(
-        pwszRelativePath: LPCOLESTR,
-        pbstrAbsolutePath: *mut BSTR,
-    ) -> HRESULT,
-}}
-
-RIDL!{#[uuid(0x89143c9a, 0x05af, 0x49b0, 0xb7, 0x17, 0x72, 0xe2, 0x18, 0xa2, 0x18, 0x5c)]
-interface ISetupInstance2(ISetupInstance2Vtbl): ISetupInstance(ISetupInstanceVtbl) {
-    fn GetState(
-        pState: *mut InstanceState,
-    ) -> HRESULT,
-    fn GetPackages(
-        ppsaPackages: *mut LPSAFEARRAY,
-    ) -> HRESULT,
-    fn GetProduct(
-        ppPackage: *mut *mut ISetupPackageReference,
-    ) -> HRESULT,
-    fn GetProductPath(
-        pbstrProductPath: *mut BSTR,
-    ) -> HRESULT,
-}}
-
-RIDL!{#[uuid(0x6380bcff, 0x41d3, 0x4b2e, 0x8b, 0x2e, 0xbf, 0x8a, 0x68, 0x10, 0xc8, 0x48)]
-interface IEnumSetupInstances(IEnumSetupInstancesVtbl): IUnknown(IUnknownVtbl) {
-    fn Next(
-        celt: ULONG,
-        rgelt: *mut *mut ISetupInstance,
-        pceltFetched: *mut ULONG,
-    ) -> HRESULT,
-    fn Skip(
-        celt: ULONG,
-    ) -> HRESULT,
-    fn Reset() -> HRESULT,
-    fn Clone(
-        ppenum: *mut *mut IEnumSetupInstances,
-    ) -> HRESULT,
-}}
-
-RIDL!{#[uuid(0x42843719, 0xdb4c, 0x46c2, 0x8e, 0x7c, 0x64, 0xf1, 0x81, 0x6e, 0xfd, 0x5b)]
-interface ISetupConfiguration(ISetupConfigurationVtbl): IUnknown(IUnknownVtbl) {
-    fn EnumInstances(
-        ppEnumInstances: *mut *mut IEnumSetupInstances,
-    ) -> HRESULT,
-    fn GetInstanceForCurrentProcess(
-        ppInstance: *mut *mut ISetupInstance,
-    ) -> HRESULT,
-    fn GetInstanceForPath(
-        wzPath: LPCWSTR,
-        ppInstance: *mut *mut ISetupInstance,
-    ) -> HRESULT,
-}}
-
-RIDL!{#[uuid(0x26aab78c, 0x4a60, 0x49d6, 0xaf, 0x3b, 0x3c, 0x35, 0xbc, 0x93, 0x36, 0x5d)]
-interface ISetupConfiguration2(ISetupConfiguration2Vtbl):
-    ISetupConfiguration(ISetupConfigurationVtbl) {
-    fn EnumAllInstances(
-        ppEnumInstances: *mut *mut IEnumSetupInstances,
-    ) -> HRESULT,
-}}
-
-RIDL!{#[uuid(0xda8d8a16, 0xb2b6, 0x4487, 0xa2, 0xf1, 0x59, 0x4c, 0xcc, 0xcd, 0x6b, 0xf5)]
-interface ISetupPackageReference(ISetupPackageReferenceVtbl): IUnknown(IUnknownVtbl) {
-    fn GetId(
-        pbstrId: *mut BSTR,
-    ) -> HRESULT,
-    fn GetVersion(
-        pbstrVersion: *mut BSTR,
-    ) -> HRESULT,
-    fn GetChip(
-        pbstrChip: *mut BSTR,
-    ) -> HRESULT,
-    fn GetLanguage(
-        pbstrLanguage: *mut BSTR,
-    ) -> HRESULT,
-    fn GetBranch(
-        pbstrBranch: *mut BSTR,
-    ) -> HRESULT,
-    fn GetType(
-        pbstrType: *mut BSTR,
-    ) -> HRESULT,
-    fn GetUniqueId(
-        pbstrUniqueId: *mut BSTR,
-    ) -> HRESULT,
-}}
-
-RIDL!{#[uuid(0x42b21b78, 0x6192, 0x463e, 0x87, 0xbf, 0xd5, 0x77, 0x83, 0x8f, 0x1d, 0x5c)]
-interface ISetupHelper(ISetupHelperVtbl): IUnknown(IUnknownVtbl) {
-    fn ParseVersion(
-        pwszVersion: LPCOLESTR,
-        pullVersion: PULONGLONG,
-    ) -> HRESULT,
-    fn ParseVersionRange(
-        pwszVersionRange: LPCOLESTR,
-        pullMinVersion: PULONGLONG,
-        pullMaxVersion: PULONGLONG,
-    ) -> HRESULT,
-}}
-
-DEFINE_GUID!{CLSID_SetupConfiguration,
-    0x177f0c4a, 0x1cd3, 0x4de7, 0xa3, 0x2c, 0x71, 0xdb, 0xbb, 0x9f, 0xa3, 0x6d}
-
-// Safe wrapper around the COM interfaces
-pub struct SetupConfiguration(ComPtr<ISetupConfiguration>);
-
-impl SetupConfiguration {
-    pub fn new() -> Result<SetupConfiguration, i32> {
-        let mut obj = null_mut();
-        let err = unsafe { CoCreateInstance(
-            &CLSID_SetupConfiguration, null_mut(), CLSCTX_ALL,
-            &ISetupConfiguration::uuidof(), &mut obj,
-        ) };
-        if err < 0 { return Err(err); }
-        let obj = unsafe { ComPtr::from_raw(obj as *mut ISetupConfiguration) };
-        Ok(SetupConfiguration(obj))
-    }
-    pub fn get_instance_for_current_process(&self) -> Result<SetupInstance, i32> {
-        let mut obj = null_mut();
-        let err = unsafe { self.0.GetInstanceForCurrentProcess(&mut obj) };
-        if err < 0 { return Err(err); }
-        Ok(unsafe { SetupInstance::from_raw(obj) })
-    }
-    pub fn enum_instances(&self) -> Result<EnumSetupInstances, i32> {
-        let mut obj = null_mut();
-        let err = unsafe { self.0.EnumInstances(&mut obj) };
-        if err < 0 { return Err(err); }
-        Ok(unsafe { EnumSetupInstances::from_raw(obj) })
-    }
-    pub fn enum_all_instances(&self) -> Result<EnumSetupInstances, i32> {
-        let mut obj = null_mut();
-        let this = try!(self.0.cast::<ISetupConfiguration2>());
-        let err = unsafe { this.EnumAllInstances(&mut obj) };
-        if err < 0 { return Err(err); }
-        Ok(unsafe { EnumSetupInstances::from_raw(obj) })
-    }
-}
-
-pub struct SetupInstance(ComPtr<ISetupInstance>);
-
-impl SetupInstance {
-    pub unsafe fn from_raw(obj: *mut ISetupInstance) -> SetupInstance {
-        SetupInstance(ComPtr::from_raw(obj))
-    }
-    pub fn instance_id(&self) -> Result<OsString, i32> {
-        let mut s = null_mut();
-        let err = unsafe { self.0.GetInstanceId(&mut s) };
-        let bstr = unsafe { BStr::from_raw(s) };
-        if err < 0 { return Err(err); }
-        Ok(bstr.to_osstring())
-    }
-    pub fn installation_name(&self) -> Result<OsString, i32> {
-        let mut s = null_mut();
-        let err = unsafe { self.0.GetInstallationName(&mut s) };
-        let bstr = unsafe { BStr::from_raw(s) };
-        if err < 0 { return Err(err); }
-        Ok(bstr.to_osstring())
-    }
-    pub fn installation_path(&self) -> Result<OsString, i32> {
-        let mut s = null_mut();
-        let err = unsafe { self.0.GetInstallationPath(&mut s) };
-        let bstr = unsafe { BStr::from_raw(s) };
-        if err < 0 { return Err(err); }
-        Ok(bstr.to_osstring())
-    }
-    pub fn installation_version(&self) -> Result<OsString, i32> {
-        let mut s = null_mut();
-        let err = unsafe { self.0.GetInstallationVersion(&mut s) };
-        let bstr = unsafe { BStr::from_raw(s) };
-        if err < 0 { return Err(err); }
-        Ok(bstr.to_osstring())
-    }
-    pub fn product_path(&self) -> Result<OsString, i32> {
-        let mut s = null_mut();
-        let this = try!(self.0.cast::<ISetupInstance2>());
-        let err = unsafe { this.GetProductPath(&mut s) };
-        let bstr = unsafe { BStr::from_raw(s) };
-        if err < 0 { return Err(err); }
-        Ok(bstr.to_osstring())
-    }
-}
-
-pub struct EnumSetupInstances(ComPtr<IEnumSetupInstances>);
-
-impl EnumSetupInstances {
-    pub unsafe fn from_raw(obj: *mut IEnumSetupInstances) -> EnumSetupInstances {
-        EnumSetupInstances(ComPtr::from_raw(obj))
-    }
-}
-
-impl Iterator for EnumSetupInstances {
-    type Item = Result<SetupInstance, i32>;
-    fn next(&mut self) -> Option<Result<SetupInstance, i32>> {
-        let mut obj = null_mut();
-        let err = unsafe { self.0.Next(1, &mut obj, null_mut()) };
-        if err < 0 { return Some(Err(err)); }
-        if err == S_FALSE { return None; }
-        Some(Ok(unsafe { SetupInstance::from_raw(obj) }))
-    }
-}
-
diff --git a/gcc/src/winapi.rs b/gcc/src/winapi.rs
deleted file mode 100644
index 3fb0408..0000000
--- a/gcc/src/winapi.rs
+++ /dev/null
@@ -1,214 +0,0 @@
-// Copyright © 2015-2017 winapi-rs developers
-// 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.
-// All files in the project carrying such notice may not be copied, modified, or distributed
-// except according to those terms.
-
-#![allow(bad_style)]
-
-use std::os::raw;
-
-pub type wchar_t = u16;
-
-pub type UINT = raw::c_uint;
-pub type LPUNKNOWN = *mut IUnknown;
-pub type REFIID = *const IID;
-pub type IID = GUID;
-pub type REFCLSID = *const IID;
-pub type PVOID = *mut raw::c_void;
-pub type USHORT = raw::c_ushort;
-pub type ULONG = raw::c_ulong;
-pub type LONG = raw::c_long;
-pub type DWORD = u32;
-pub type LPVOID = *mut raw::c_void;
-pub type HRESULT = raw::c_long;
-pub type LPFILETIME = *mut FILETIME;
-pub type BSTR = *mut OLECHAR;
-pub type OLECHAR = WCHAR;
-pub type WCHAR = wchar_t;
-pub type LPCOLESTR = *const OLECHAR;
-pub type LCID = DWORD;
-pub type LPCWSTR = *const WCHAR;
-pub type PULONGLONG = *mut ULONGLONG;
-pub type ULONGLONG = u64;
-
-pub const S_OK: HRESULT = 0;
-pub const S_FALSE: HRESULT = 1;
-pub const COINIT_MULTITHREADED: u32 = 0x0;
-
-pub type CLSCTX = u32;
-
-pub const CLSCTX_INPROC_SERVER: CLSCTX = 0x1;
-pub const CLSCTX_INPROC_HANDLER: CLSCTX = 0x2;
-pub const CLSCTX_LOCAL_SERVER: CLSCTX = 0x4;
-pub const CLSCTX_REMOTE_SERVER: CLSCTX = 0x10;
-
-pub const CLSCTX_ALL: CLSCTX = CLSCTX_INPROC_SERVER |
-    CLSCTX_INPROC_HANDLER | CLSCTX_LOCAL_SERVER | CLSCTX_REMOTE_SERVER;
-
-#[repr(C)]
-#[derive(Copy, Clone)]
-pub struct GUID {
-    pub Data1: raw::c_ulong,
-    pub Data2: raw::c_ushort,
-    pub Data3: raw::c_ushort,
-    pub Data4: [raw::c_uchar; 8],
-}
-
-#[repr(C)]
-#[derive(Copy, Clone)]
-pub struct FILETIME {
-    pub dwLowDateTime: DWORD,
-    pub dwHighDateTime: DWORD,
-}
-
-pub trait Interface {
-    fn uuidof() -> GUID;
-}
-
-#[link(name = "ole32")]
-#[link(name = "oleaut32")]
-extern { }
-
-extern "system" {
-    pub fn CoInitializeEx(pvReserved: LPVOID, dwCoInit: DWORD) -> HRESULT;
-    pub fn CoCreateInstance(rclsid: REFCLSID, pUnkOuter: LPUNKNOWN,
-                            dwClsContext: DWORD, riid: REFIID,
-                            ppv: *mut LPVOID) -> HRESULT;
-    pub fn SysFreeString(bstrString: BSTR);
-    pub fn SysStringLen(pbstr: BSTR) -> UINT;
-}
-
-#[repr(C)]
-#[derive(Copy, Clone)]
-pub struct SAFEARRAYBOUND {
-    pub cElements: ULONG,
-    pub lLbound: LONG,
-}
-
-#[repr(C)]
-#[derive(Copy, Clone)]
-pub struct SAFEARRAY {
-    pub cDims: USHORT,
-    pub fFeatures: USHORT,
-    pub cbElements: ULONG,
-    pub cLocks: ULONG,
-    pub pvData: PVOID,
-    pub rgsabound: [SAFEARRAYBOUND; 1],
-}
-
-pub type LPSAFEARRAY = *mut SAFEARRAY;
-
-macro_rules! DEFINE_GUID {
-    (
-        $name:ident, $l:expr, $w1:expr, $w2:expr,
-        $b1:expr, $b2:expr, $b3:expr, $b4:expr, $b5:expr, $b6:expr, $b7:expr, $b8:expr
-    ) => {
-        pub const $name: $crate::winapi::GUID = $crate::winapi::GUID {
-            Data1: $l,
-            Data2: $w1,
-            Data3: $w2,
-            Data4: [$b1, $b2, $b3, $b4, $b5, $b6, $b7, $b8],
-        };
-    }
-}
-
-macro_rules! RIDL {
-    (#[uuid($($uuid:expr),+)]
-    interface $interface:ident ($vtbl:ident) {$(
-        fn $method:ident($($p:ident : $t:ty,)*) -> $rtr:ty,
-    )+}) => (
-        #[repr(C)]
-        pub struct $vtbl {
-            $(pub $method: unsafe extern "system" fn(
-                This: *mut $interface,
-                $($p: $t),*
-            ) -> $rtr,)+
-        }
-        #[repr(C)]
-        pub struct $interface {
-            pub lpVtbl: *const $vtbl,
-        }
-        RIDL!{@impl $interface {$(fn $method($($p: $t,)*) -> $rtr,)+}}
-        RIDL!{@uuid $interface $($uuid),+}
-    );
-    (#[uuid($($uuid:expr),+)]
-    interface $interface:ident ($vtbl:ident) : $pinterface:ident ($pvtbl:ident) {
-    }) => (
-        #[repr(C)]
-        pub struct $vtbl {
-            pub parent: $pvtbl,
-        }
-        #[repr(C)]
-        pub struct $interface {
-            pub lpVtbl: *const $vtbl,
-        }
-        RIDL!{@deref $interface $pinterface}
-        RIDL!{@uuid $interface $($uuid),+}
-    );
-    (#[uuid($($uuid:expr),+)]
-    interface $interface:ident ($vtbl:ident) : $pinterface:ident ($pvtbl:ident) {$(
-        fn $method:ident($($p:ident : $t:ty,)*) -> $rtr:ty,
-    )+}) => (
-        #[repr(C)]
-        pub struct $vtbl {
-            pub parent: $pvtbl,
-            $(pub $method: unsafe extern "system" fn(
-                This: *mut $interface,
-                $($p: $t,)*
-            ) -> $rtr,)+
-        }
-        #[repr(C)]
-        pub struct $interface {
-            pub lpVtbl: *const $vtbl,
-        }
-        RIDL!{@impl $interface {$(fn $method($($p: $t,)*) -> $rtr,)+}}
-        RIDL!{@deref $interface $pinterface}
-        RIDL!{@uuid $interface $($uuid),+}
-    );
-    (@deref $interface:ident $pinterface:ident) => (
-        impl ::std::ops::Deref for $interface {
-            type Target = $pinterface;
-            #[inline]
-            fn deref(&self) -> &$pinterface {
-                unsafe { &*(self as *const $interface as *const $pinterface) }
-            }
-        }
-    );
-    (@impl $interface:ident {$(
-        fn $method:ident($($p:ident : $t:ty,)*) -> $rtr:ty,
-    )+}) => (
-        impl $interface {
-            $(#[inline] pub unsafe fn $method(&self, $($p: $t,)*) -> $rtr {
-                ((*self.lpVtbl).$method)(self as *const _ as *mut _, $($p,)*)
-            })+
-        }
-    );
-    (@uuid $interface:ident
-        $l:expr, $w1:expr, $w2:expr,
-        $b1:expr, $b2:expr, $b3:expr, $b4:expr, $b5:expr, $b6:expr, $b7:expr, $b8:expr
-    ) => (
-        impl $crate::winapi::Interface for $interface {
-            #[inline]
-            fn uuidof() -> $crate::winapi::GUID {
-                $crate::winapi::GUID {
-                    Data1: $l,
-                    Data2: $w1,
-                    Data3: $w2,
-                    Data4: [$b1, $b2, $b3, $b4, $b5, $b6, $b7, $b8],
-                }
-            }
-        }
-    );
-}
-
-RIDL!{#[uuid(0x00000000, 0x0000, 0x0000, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46)]
-interface IUnknown(IUnknownVtbl) {
-    fn QueryInterface(
-        riid: REFIID,
-        ppvObject: *mut *mut raw::c_void,
-    ) -> HRESULT,
-    fn AddRef() -> ULONG,
-    fn Release() -> ULONG,
-}}
diff --git a/gcc/src/windows_registry.rs b/gcc/src/windows_registry.rs
deleted file mode 100644
index 9099e0f..0000000
--- a/gcc/src/windows_registry.rs
+++ /dev/null
@@ -1,634 +0,0 @@
-// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! A helper module to probe the Windows Registry when looking for
-//! windows-specific tools.
-
-use std::process::Command;
-
-use Tool;
-
-#[cfg(windows)]
-macro_rules! otry {
-    ($expr:expr) => (match $expr {
-        Some(val) => val,
-        None => return None,
-    })
-}
-
-/// Attempts to find a tool within an MSVC installation using the Windows
-/// registry as a point to search from.
-///
-/// The `target` argument is the target that the tool should work for (e.g.
-/// compile or link for) and the `tool` argument is the tool to find (e.g.
-/// `cl.exe` or `link.exe`).
-///
-/// This function will return `None` if the tool could not be found, or it will
-/// return `Some(cmd)` which represents a command that's ready to execute the
-/// tool with the appropriate environment variables set.
-///
-/// Note that this function always returns `None` for non-MSVC targets.
-pub fn find(target: &str, tool: &str) -> Option<Command> {
-    find_tool(target, tool).map(|c| c.to_command())
-}
-
-/// Similar to the `find` function above, this function will attempt the same
-/// operation (finding a MSVC tool in a local install) but instead returns a
-/// `Tool` which may be introspected.
-#[cfg(not(windows))]
-pub fn find_tool(_target: &str, _tool: &str) -> Option<Tool> {
-    None
-}
-
-/// Documented above.
-#[cfg(windows)]
-pub fn find_tool(target: &str, tool: &str) -> Option<Tool> {
-    use std::env;
-
-    // This logic is all tailored for MSVC, if we're not that then bail out
-    // early.
-    if !target.contains("msvc") {
-        return None;
-    }
-
-    // Looks like msbuild isn't located in the same location as other tools like
-    // cl.exe and lib.exe. To handle this we probe for it manually with
-    // dedicated registry keys.
-    if tool.contains("msbuild") {
-        return impl_::find_msbuild(target);
-    }
-
-    // If VCINSTALLDIR is set, then someone's probably already run vcvars and we
-    // should just find whatever that indicates.
-    if env::var_os("VCINSTALLDIR").is_some() {
-        return env::var_os("PATH")
-            .and_then(|path| env::split_paths(&path).map(|p| p.join(tool)).find(|p| p.exists()))
-            .map(|path| Tool::new(path.into()));
-    }
-
-    // Ok, if we're here, now comes the fun part of the probing. Default shells
-    // or shells like MSYS aren't really configured to execute `cl.exe` and the
-    // various compiler tools shipped as part of Visual Studio. Here we try to
-    // first find the relevant tool, then we also have to be sure to fill in
-    // environment variables like `LIB`, `INCLUDE`, and `PATH` to ensure that
-    // the tool is actually usable.
-
-    return impl_::find_msvc_15(tool, target)
-        .or_else(|| impl_::find_msvc_14(tool, target))
-        .or_else(|| impl_::find_msvc_12(tool, target))
-        .or_else(|| impl_::find_msvc_11(tool, target));
-}
-
-/// A version of Visual Studio
-#[derive(Debug, PartialEq, Eq, Copy, Clone)]
-pub enum VsVers {
-    /// Visual Studio 12 (2013)
-    Vs12,
-    /// Visual Studio 14 (2015)
-    Vs14,
-    /// Visual Studio 15 (2017)
-    Vs15,
-
-    /// Hidden variant that should not be matched on. Callers that want to
-    /// handle an enumeration of `VsVers` instances should always have a default
-    /// case meaning that it's a VS version they don't understand.
-    #[doc(hidden)]
-    #[allow(bad_style)]
-    __Nonexhaustive_do_not_match_this_or_your_code_will_break,
-}
-
-/// Find the most recent installed version of Visual Studio
-///
-/// This is used by the cmake crate to figure out the correct
-/// generator.
-#[cfg(not(windows))]
-pub fn find_vs_version() -> Result<VsVers, String> {
-    Err(format!("not windows"))
-}
-
-/// Documented above
-#[cfg(windows)]
-pub fn find_vs_version() -> Result<VsVers, String> {
-    use std::env;
-
-    match env::var("VisualStudioVersion") {
-        Ok(version) => {
-            match &version[..] {
-                "15.0" => Ok(VsVers::Vs15),
-                "14.0" => Ok(VsVers::Vs14),
-                "12.0" => Ok(VsVers::Vs12),
-                vers => Err(format!("\n\n\
-                                     unsupported or unknown VisualStudio version: {}\n\
-                                     if another version is installed consider running \
-                                     the appropriate vcvars script before building this \
-                                     crate\n\
-                                     ", vers)),
-            }
-        }
-        _ => {
-            // Check for the presense of a specific registry key
-            // that indicates visual studio is installed.
-            if impl_::has_msbuild_version("15.0") {
-                Ok(VsVers::Vs15)
-            } else if impl_::has_msbuild_version("14.0") {
-                Ok(VsVers::Vs14)
-            } else if impl_::has_msbuild_version("12.0") {
-                Ok(VsVers::Vs12)
-            } else {
-                Err(format!("\n\n\
-                             couldn't determine visual studio generator\n\
-                             if VisualStudio is installed, however, consider \
-                             running the appropriate vcvars script before building \
-                             this crate\n\
-                             "))
-            }
-        }
-    }
-}
-
-#[cfg(windows)]
-mod impl_ {
-    use std::env;
-    use std::ffi::OsString;
-    use std::mem;
-    use std::path::{Path, PathBuf};
-    use std::fs::File;
-    use std::io::Read;
-    use registry::{RegistryKey, LOCAL_MACHINE};
-    use com;
-    use setup_config::{SetupConfiguration, SetupInstance};
-
-    use Tool;
-
-    struct MsvcTool {
-        tool: PathBuf,
-        libs: Vec<PathBuf>,
-        path: Vec<PathBuf>,
-        include: Vec<PathBuf>,
-    }
-
-    impl MsvcTool {
-        fn new(tool: PathBuf) -> MsvcTool {
-            MsvcTool {
-                tool: tool,
-                libs: Vec::new(),
-                path: Vec::new(),
-                include: Vec::new(),
-            }
-        }
-
-        fn into_tool(self) -> Tool {
-            let MsvcTool { tool, libs, path, include } = self;
-            let mut tool = Tool::new(tool.into());
-            add_env(&mut tool, "LIB", libs);
-            add_env(&mut tool, "PATH", path);
-            add_env(&mut tool, "INCLUDE", include);
-            tool
-        }
-    }
-
-    // In MSVC 15 (2017) MS once again changed the scheme for locating
-    // the tooling.  Now we must go through some COM interfaces, which
-    // is super fun for Rust.
-    //
-    // Note that much of this logic can be found [online] wrt paths, COM, etc.
-    //
-    // [online]: https://blogs.msdn.microsoft.com/vcblog/2017/03/06/finding-the-visual-c-compiler-tools-in-visual-studio-2017/
-    pub fn find_msvc_15(tool: &str, target: &str) -> Option<Tool> {
-        otry!(com::initialize().ok());
-
-        let config = otry!(SetupConfiguration::new().ok());
-        let iter = otry!(config.enum_all_instances().ok());
-        for instance in iter {
-            let instance = otry!(instance.ok());
-            let tool = tool_from_vs15_instance(tool, target, &instance);
-            if tool.is_some() {
-                return tool;
-            }
-        }
-
-        None
-    }
-
-    fn tool_from_vs15_instance(tool: &str, target: &str,
-                               instance: &SetupInstance) -> Option<Tool> {
-        let (bin_path, host_dylib_path, lib_path, include_path) = otry!(vs15_vc_paths(target, instance));
-        let tool_path = bin_path.join(tool);
-        if !tool_path.exists() { return None };
-
-        let mut tool = MsvcTool::new(tool_path);
-        tool.path.push(host_dylib_path);
-        tool.libs.push(lib_path);
-        tool.include.push(include_path);
-
-        if let Some((atl_lib_path, atl_include_path)) = atl_paths(target, &bin_path) {
-            tool.libs.push(atl_lib_path);
-            tool.include.push(atl_include_path);
-        }
-
-        otry!(add_sdks(&mut tool, target));
-
-        Some(tool.into_tool())
-    }
-
-    fn vs15_vc_paths(target: &str, instance: &SetupInstance) -> Option<(PathBuf, PathBuf, PathBuf, PathBuf)> {
-        let instance_path: PathBuf = otry!(instance.installation_path().ok()).into();
-        let version_path = instance_path.join(r"VC\Auxiliary\Build\Microsoft.VCToolsVersion.default.txt");
-        let mut version_file = otry!(File::open(version_path).ok());
-        let mut version = String::new();
-        otry!(version_file.read_to_string(&mut version).ok());
-        let version = version.trim();
-        let host = match host_arch() {
-            X86 => "X86",
-            X86_64 => "X64",
-            _ => return None,
-        };
-        let target = otry!(lib_subdir(target));
-        // The directory layout here is MSVC/bin/Host$host/$target/
-        let path = instance_path.join(r"VC\Tools\MSVC").join(version);
-        // This is the path to the toolchain for a particular target, running
-        // on a given host
-        let bin_path = path.join("bin").join(&format!("Host{}", host)).join(&target);
-        // But! we also need PATH to contain the target directory for the host
-        // architecture, because it contains dlls like mspdb140.dll compiled for
-        // the host architecture.
-        let host_dylib_path = path.join("bin").join(&format!("Host{}", host)).join(&host.to_lowercase());
-        let lib_path = path.join("lib").join(&target);
-        let include_path = path.join("include");
-        Some((bin_path, host_dylib_path, lib_path, include_path))
-    }
-
-    fn atl_paths(target: &str, path: &Path) -> Option<(PathBuf, PathBuf)> {
-        let atl_path = path.join("atlfmc");
-        let sub = otry!(lib_subdir(target));
-        if atl_path.exists() {
-            Some((atl_path.join("lib").join(sub), atl_path.join("include")))
-        } else {
-            None
-        }
-    }
-
-    // For MSVC 14 we need to find the Universal CRT as well as either
-    // the Windows 10 SDK or Windows 8.1 SDK.
-    pub fn find_msvc_14(tool: &str, target: &str) -> Option<Tool> {
-        let vcdir = otry!(get_vc_dir("14.0"));
-        let mut tool = otry!(get_tool(tool, &vcdir, target));
-        otry!(add_sdks(&mut tool, target));
-        Some(tool.into_tool())
-    }
-
-    fn add_sdks(tool: &mut MsvcTool, target: &str) -> Option<()> {
-        let sub = otry!(lib_subdir(target));
-        let (ucrt, ucrt_version) = otry!(get_ucrt_dir());
-
-        tool.path.push(ucrt.join("bin").join(&ucrt_version).join(sub));
-
-        let ucrt_include = ucrt.join("include").join(&ucrt_version);
-        tool.include.push(ucrt_include.join("ucrt"));
-
-        let ucrt_lib = ucrt.join("lib").join(&ucrt_version);
-        tool.libs.push(ucrt_lib.join("ucrt").join(sub));
-
-        if let Some((sdk, version)) = get_sdk10_dir() {
-            tool.path.push(sdk.join("bin").join(sub));
-            let sdk_lib = sdk.join("lib").join(&version);
-            tool.libs.push(sdk_lib.join("um").join(sub));
-            let sdk_include = sdk.join("include").join(&version);
-            tool.include.push(sdk_include.join("um"));
-            tool.include.push(sdk_include.join("winrt"));
-            tool.include.push(sdk_include.join("shared"));
-        } else if let Some(sdk) = get_sdk81_dir() {
-            tool.path.push(sdk.join("bin").join(sub));
-            let sdk_lib = sdk.join("lib").join("winv6.3");
-            tool.libs.push(sdk_lib.join("um").join(sub));
-            let sdk_include = sdk.join("include");
-            tool.include.push(sdk_include.join("um"));
-            tool.include.push(sdk_include.join("winrt"));
-            tool.include.push(sdk_include.join("shared"));
-        }
-
-        Some(())
-    }
-
-    // For MSVC 12 we need to find the Windows 8.1 SDK.
-    pub fn find_msvc_12(tool: &str, target: &str) -> Option<Tool> {
-        let vcdir = otry!(get_vc_dir("12.0"));
-        let mut tool = otry!(get_tool(tool, &vcdir, target));
-        let sub = otry!(lib_subdir(target));
-        let sdk81 = otry!(get_sdk81_dir());
-        tool.path.push(sdk81.join("bin").join(sub));
-        let sdk_lib = sdk81.join("lib").join("winv6.3");
-        tool.libs.push(sdk_lib.join("um").join(sub));
-        let sdk_include = sdk81.join("include");
-        tool.include.push(sdk_include.join("shared"));
-        tool.include.push(sdk_include.join("um"));
-        tool.include.push(sdk_include.join("winrt"));
-        Some(tool.into_tool())
-    }
-
-    // For MSVC 11 we need to find the Windows 8 SDK.
-    pub fn find_msvc_11(tool: &str, target: &str) -> Option<Tool> {
-        let vcdir = otry!(get_vc_dir("11.0"));
-        let mut tool = otry!(get_tool(tool, &vcdir, target));
-        let sub = otry!(lib_subdir(target));
-        let sdk8 = otry!(get_sdk8_dir());
-        tool.path.push(sdk8.join("bin").join(sub));
-        let sdk_lib = sdk8.join("lib").join("win8");
-        tool.libs.push(sdk_lib.join("um").join(sub));
-        let sdk_include = sdk8.join("include");
-        tool.include.push(sdk_include.join("shared"));
-        tool.include.push(sdk_include.join("um"));
-        tool.include.push(sdk_include.join("winrt"));
-        Some(tool.into_tool())
-    }
-
-    fn add_env(tool: &mut Tool, env: &str, paths: Vec<PathBuf>) {
-        let prev = env::var_os(env).unwrap_or(OsString::new());
-        let prev = env::split_paths(&prev);
-        let new = paths.into_iter().chain(prev);
-        tool.env.push((env.to_string().into(), env::join_paths(new).unwrap()));
-    }
-
-    // Given a possible MSVC installation directory, we look for the linker and
-    // then add the MSVC library path.
-    fn get_tool(tool: &str, path: &Path, target: &str) -> Option<MsvcTool> {
-        bin_subdir(target)
-            .into_iter()
-            .map(|(sub, host)| (path.join("bin").join(sub).join(tool), path.join("bin").join(host)))
-            .filter(|&(ref path, _)| path.is_file())
-            .map(|(path, host)| {
-                let mut tool = MsvcTool::new(path);
-                tool.path.push(host);
-                tool
-            })
-            .filter_map(|mut tool| {
-                let sub = otry!(vc_lib_subdir(target));
-                tool.libs.push(path.join("lib").join(sub));
-                tool.include.push(path.join("include"));
-                let atlmfc_path = path.join("atlmfc");
-                if atlmfc_path.exists() {
-                    tool.libs.push(atlmfc_path.join("lib").join(sub));
-                    tool.include.push(atlmfc_path.join("include"));
-                }
-                Some(tool)
-            })
-            .next()
-    }
-
-    // To find MSVC we look in a specific registry key for the version we are
-    // trying to find.
-    fn get_vc_dir(ver: &str) -> Option<PathBuf> {
-        let key = r"SOFTWARE\Microsoft\VisualStudio\SxS\VC7";
-        let key = otry!(LOCAL_MACHINE.open(key.as_ref()).ok());
-        let path = otry!(key.query_str(ver).ok());
-        Some(path.into())
-    }
-
-    // To find the Universal CRT we look in a specific registry key for where
-    // all the Universal CRTs are located and then sort them asciibetically to
-    // find the newest version. While this sort of sorting isn't ideal,  it is
-    // what vcvars does so that's good enough for us.
-    //
-    // Returns a pair of (root, version) for the ucrt dir if found
-    fn get_ucrt_dir() -> Option<(PathBuf, String)> {
-        let key = r"SOFTWARE\Microsoft\Windows Kits\Installed Roots";
-        let key = otry!(LOCAL_MACHINE.open(key.as_ref()).ok());
-        let root = otry!(key.query_str("KitsRoot10").ok());
-        let readdir = otry!(Path::new(&root).join("lib").read_dir().ok());
-        let max_libdir = otry!(readdir.filter_map(|dir| dir.ok())
-            .map(|dir| dir.path())
-            .filter(|dir| {
-                dir.components()
-                    .last()
-                    .and_then(|c| c.as_os_str().to_str())
-                    .map(|c| c.starts_with("10.") && dir.join("ucrt").is_dir())
-                    .unwrap_or(false)
-            })
-            .max());
-        let version = max_libdir.components().last().unwrap();
-        let version = version.as_os_str().to_str().unwrap().to_string();
-        Some((root.into(), version))
-    }
-
-    // Vcvars finds the correct version of the Windows 10 SDK by looking
-    // for the include `um\Windows.h` because sometimes a given version will
-    // only have UCRT bits without the rest of the SDK. Since we only care about
-    // libraries and not includes, we instead look for `um\x64\kernel32.lib`.
-    // Since the 32-bit and 64-bit libraries are always installed together we
-    // only need to bother checking x64, making this code a tiny bit simpler.
-    // Like we do for the Universal CRT, we sort the possibilities
-    // asciibetically to find the newest one as that is what vcvars does.
-    fn get_sdk10_dir() -> Option<(PathBuf, String)> {
-        let key = r"SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0";
-        let key = otry!(LOCAL_MACHINE.open(key.as_ref()).ok());
-        let root = otry!(key.query_str("InstallationFolder").ok());
-        let readdir = otry!(Path::new(&root).join("lib").read_dir().ok());
-        let mut dirs = readdir.filter_map(|dir| dir.ok())
-            .map(|dir| dir.path())
-            .collect::<Vec<_>>();
-        dirs.sort();
-        let dir = otry!(dirs.into_iter()
-            .rev()
-            .filter(|dir| dir.join("um").join("x64").join("kernel32.lib").is_file())
-            .next());
-        let version = dir.components().last().unwrap();
-        let version = version.as_os_str().to_str().unwrap().to_string();
-        Some((root.into(), version))
-    }
-
-    // Interestingly there are several subdirectories, `win7` `win8` and
-    // `winv6.3`. Vcvars seems to only care about `winv6.3` though, so the same
-    // applies to us. Note that if we were targetting kernel mode drivers
-    // instead of user mode applications, we would care.
-    fn get_sdk81_dir() -> Option<PathBuf> {
-        let key = r"SOFTWARE\Microsoft\Microsoft SDKs\Windows\v8.1";
-        let key = otry!(LOCAL_MACHINE.open(key.as_ref()).ok());
-        let root = otry!(key.query_str("InstallationFolder").ok());
-        Some(root.into())
-    }
-
-    fn get_sdk8_dir() -> Option<PathBuf> {
-        let key = r"SOFTWARE\Microsoft\Microsoft SDKs\Windows\v8.0";
-        let key = otry!(LOCAL_MACHINE.open(key.as_ref()).ok());
-        let root = otry!(key.query_str("InstallationFolder").ok());
-        Some(root.into())
-    }
-
-    const PROCESSOR_ARCHITECTURE_INTEL: u16 = 0;
-    const PROCESSOR_ARCHITECTURE_AMD64: u16 = 9;
-    const X86: u16 = PROCESSOR_ARCHITECTURE_INTEL;
-    const X86_64: u16 = PROCESSOR_ARCHITECTURE_AMD64;
-
-    // When choosing the tool to use, we have to choose the one which matches
-    // the target architecture. Otherwise we end up in situations where someone
-    // on 32-bit Windows is trying to cross compile to 64-bit and it tries to
-    // invoke the native 64-bit compiler which won't work.
-    //
-    // For the return value of this function, the first member of the tuple is
-    // the folder of the tool we will be invoking, while the second member is
-    // the folder of the host toolchain for that tool which is essential when
-    // using a cross linker. We return a Vec since on x64 there are often two
-    // linkers that can target the architecture we desire. The 64-bit host
-    // linker is preferred, and hence first, due to 64-bit allowing it more
-    // address space to work with and potentially being faster.
-    fn bin_subdir(target: &str) -> Vec<(&'static str, &'static str)> {
-        let arch = target.split('-').next().unwrap();
-        match (arch, host_arch()) {
-            ("i586", X86) | ("i686", X86) => vec![("", "")],
-            ("i586", X86_64) | ("i686", X86_64) => vec![("amd64_x86", "amd64"), ("", "")],
-            ("x86_64", X86) => vec![("x86_amd64", "")],
-            ("x86_64", X86_64) => vec![("amd64", "amd64"), ("x86_amd64", "")],
-            ("arm", X86) => vec![("x86_arm", "")],
-            ("arm", X86_64) => vec![("amd64_arm", "amd64"), ("x86_arm", "")],
-            _ => vec![],
-        }
-    }
-
-    fn lib_subdir(target: &str) -> Option<&'static str> {
-        let arch = target.split('-').next().unwrap();
-        match arch {
-            "i586" | "i686" => Some("x86"),
-            "x86_64" => Some("x64"),
-            "arm" => Some("arm"),
-            _ => None,
-        }
-    }
-
-    // MSVC's x86 libraries are not in a subfolder
-    fn vc_lib_subdir(target: &str) -> Option<&'static str> {
-        let arch = target.split('-').next().unwrap();
-        match arch {
-            "i586" | "i686" => Some(""),
-            "x86_64" => Some("amd64"),
-            "arm" => Some("arm"),
-            _ => None,
-        }
-    }
-
-    #[allow(bad_style)]
-    fn host_arch() -> u16 {
-        type DWORD = u32;
-        type WORD = u16;
-        type LPVOID = *mut u8;
-        type DWORD_PTR = usize;
-
-        #[repr(C)]
-        struct SYSTEM_INFO {
-            wProcessorArchitecture: WORD,
-            _wReserved: WORD,
-            _dwPageSize: DWORD,
-            _lpMinimumApplicationAddress: LPVOID,
-            _lpMaximumApplicationAddress: LPVOID,
-            _dwActiveProcessorMask: DWORD_PTR,
-            _dwNumberOfProcessors: DWORD,
-            _dwProcessorType: DWORD,
-            _dwAllocationGranularity: DWORD,
-            _wProcessorLevel: WORD,
-            _wProcessorRevision: WORD,
-        }
-
-        extern "system" {
-            fn GetNativeSystemInfo(lpSystemInfo: *mut SYSTEM_INFO);
-        }
-
-        unsafe {
-            let mut info = mem::zeroed();
-            GetNativeSystemInfo(&mut info);
-            info.wProcessorArchitecture
-        }
-    }
-
-    // Given a registry key, look at all the sub keys and find the one which has
-    // the maximal numeric value.
-    //
-    // Returns the name of the maximal key as well as the opened maximal key.
-    fn max_version(key: &RegistryKey) -> Option<(OsString, RegistryKey)> {
-        let mut max_vers = 0;
-        let mut max_key = None;
-        for subkey in key.iter().filter_map(|k| k.ok()) {
-            let val = subkey.to_str()
-                .and_then(|s| s.trim_left_matches("v").replace(".", "").parse().ok());
-            let val = match val {
-                Some(s) => s,
-                None => continue,
-            };
-            if val > max_vers {
-                if let Ok(k) = key.open(&subkey) {
-                    max_vers = val;
-                    max_key = Some((subkey, k));
-                }
-            }
-        }
-        max_key
-    }
-
-    pub fn has_msbuild_version(version: &str) -> bool {
-        match version {
-            "15.0" => {
-                find_msbuild_vs15("x86_64-pc-windows-msvc").is_some() ||
-                    find_msbuild_vs15("i686-pc-windows-msvc").is_some()
-            }
-            "12.0" | "14.0" => {
-                LOCAL_MACHINE.open(
-                    &OsString::from(format!("SOFTWARE\\Microsoft\\MSBuild\\ToolsVersions\\{}",
-                                            version))).is_ok()
-            }
-            _ => false
-        }
-    }
-
-    // see http://stackoverflow.com/questions/328017/path-to-msbuild
-    pub fn find_msbuild(target: &str) -> Option<Tool> {
-        // VS 15 (2017) changed how to locate msbuild
-        if let Some(r) = find_msbuild_vs15(target) {
-            return Some(r);
-        } else {
-            find_old_msbuild(target)
-        }
-    }
-
-    fn find_msbuild_vs15(target: &str) -> Option<Tool> {
-        // Seems like this could also go through SetupConfiguration,
-        // or that find_msvc_15 could just use this registry key
-        // instead of the COM interface.
-        let key = r"SOFTWARE\WOW6432Node\Microsoft\VisualStudio\SxS\VS7";
-        LOCAL_MACHINE.open(key.as_ref())
-            .ok()
-            .and_then(|key| {
-                key.query_str("15.0").ok()
-            })
-            .map(|path| {
-                let path = PathBuf::from(path).join(r"MSBuild\15.0\Bin\MSBuild.exe");
-                let mut tool = Tool::new(path);
-                if target.contains("x86_64") {
-                    tool.env.push(("Platform".into(), "X64".into()));
-                }
-                tool
-            })
-    }
-
-    fn find_old_msbuild(target: &str) -> Option<Tool> {
-        let key = r"SOFTWARE\Microsoft\MSBuild\ToolsVersions";
-        LOCAL_MACHINE.open(key.as_ref())
-            .ok()
-            .and_then(|key| {
-                max_version(&key).and_then(|(_vers, key)| key.query_str("MSBuildToolsPath").ok())
-            })
-            .map(|path| {
-                let mut path = PathBuf::from(path);
-                path.push("MSBuild.exe");
-                let mut tool = Tool::new(path);
-                if target.contains("x86_64") {
-                    tool.env.push(("Platform".into(), "X64".into()));
-                }
-                tool
-            })
-    }
-}