Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

6 files changed, 919 insertions, 0 deletions

diff --git a/third_party/rust/cmake/.cargo-checksum.json b/third_party/rust/cmake/.cargo-checksum.json
new file mode 100644
index 0000000000..f0bcc33657
--- /dev/null
+++ b/third_party/rust/cmake/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"159a1f1908654ee80dcab59e9eacee17525697b98cc99a8a4834ab423dfeaddb","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"378f5840b258e2779c39418f3f2d7b2ba96f1c7917dd6be0713f88305dbda397","README.md":"07a575f3911ae3563dd87a8cc693d9af232e9b55e9c0b170bc49f37869a07f7f","src/lib.rs":"36af1560f494fc1e159253b4a8334f58937d7a3a3c2b7120d42d1c78b9e4b518"},"package":"56d741ea7a69e577f6d06b36b7dff4738f680593dc27a701ffa8506b73ce28bb"}
\ No newline at end of file
diff --git a/third_party/rust/cmake/Cargo.toml b/third_party/rust/cmake/Cargo.toml
new file mode 100644
index 0000000000..c3d525ce68
--- /dev/null
+++ b/third_party/rust/cmake/Cargo.toml
@@ -0,0 +1,25 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g. crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+name = "cmake"
+version = "0.1.29"
+authors = ["Alex Crichton <alex@alexcrichton.com>"]
+description = "A build dependency for running `cmake` to build a native library\n"
+homepage = "https://github.com/alexcrichton/cmake-rs"
+documentation = "http://alexcrichton.com/cmake-rs"
+readme = "README.md"
+keywords = ["build-dependencies"]
+license = "MIT/Apache-2.0"
+repository = "https://github.com/alexcrichton/cmake-rs"
+[dependencies.cc]
+version = "1.0"
diff --git a/third_party/rust/cmake/LICENSE-APACHE b/third_party/rust/cmake/LICENSE-APACHE
new file mode 100644
index 0000000000..16fe87b06e
--- /dev/null
+++ b/third_party/rust/cmake/LICENSE-APACHE
@@ -0,0 +1,201 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
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+   Contributor provides its Contributions) on an "AS IS" BASIS,
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+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
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+
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+   file or class name and description of purpose be included on the
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+Copyright [yyyy] [name of copyright owner]
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
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diff --git a/third_party/rust/cmake/LICENSE-MIT b/third_party/rust/cmake/LICENSE-MIT
new file mode 100644
index 0000000000..39e0ed6602
--- /dev/null
+++ b/third_party/rust/cmake/LICENSE-MIT
@@ -0,0 +1,25 @@
+Copyright (c) 2014 Alex Crichton
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/third_party/rust/cmake/README.md b/third_party/rust/cmake/README.md
new file mode 100644
index 0000000000..07453382b9
--- /dev/null
+++ b/third_party/rust/cmake/README.md
@@ -0,0 +1,34 @@
+# cmake
+
+[![Build Status](https://travis-ci.org/alexcrichton/cmake-rs.svg?branch=master)](https://travis-ci.org/alexcrichton/cmake-rs)
+
+[Documentation](http://alexcrichton.com/cmake-rs)
+
+A build dependency for running the `cmake` build tool to compile a native
+library.
+
+```toml
+# Cargo.toml
+[build-dependencies]
+cmake = "0.2"
+```
+
+The CMake executable is assumed to be `cmake` unless the `CMAKE`
+environmental variable is set.
+
+# License
+
+This project is licensed under either of
+
+ * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+   http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+   http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in Serde by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.
diff --git a/third_party/rust/cmake/src/lib.rs b/third_party/rust/cmake/src/lib.rs
new file mode 100644
index 0000000000..c1836b2f76
--- /dev/null
+++ b/third_party/rust/cmake/src/lib.rs
@@ -0,0 +1,633 @@
+//! A build dependency for running `cmake` to build a native library
+//!
+//! This crate provides some necessary boilerplate and shim support for running
+//! the system `cmake` command to build a native library. It will add
+//! appropriate cflags for building code to link into Rust, handle cross
+//! compilation, and use the necessary generator for the platform being
+//! targeted.
+//!
+//! The builder-style configuration allows for various variables and such to be
+//! passed down into the build as well.
+//!
+//! ## Installation
+//!
+//! Add this to your `Cargo.toml`:
+//!
+//! ```toml
+//! [build-dependencies]
+//! cmake = "0.1"
+//! ```
+//!
+//! ## Examples
+//!
+//! ```no_run
+//! use cmake;
+//!
+//! // Builds the project in the directory located in `libfoo`, installing it
+//! // into $OUT_DIR
+//! let dst = cmake::build("libfoo");
+//!
+//! println!("cargo:rustc-link-search=native={}", dst.display());
+//! println!("cargo:rustc-link-lib=static=foo");
+//! ```
+//!
+//! ```no_run
+//! use cmake::Config;
+//!
+//! let dst = Config::new("libfoo")
+//!                  .define("FOO", "BAR")
+//!                  .cflag("-foo")
+//!                  .build();
+//! println!("cargo:rustc-link-search=native={}", dst.display());
+//! println!("cargo:rustc-link-lib=static=foo");
+//! ```
+
+#![deny(missing_docs)]
+
+extern crate cc;
+
+use std::env;
+use std::ffi::{OsString, OsStr};
+use std::fs::{self, File};
+use std::io::ErrorKind;
+use std::io::prelude::*;
+use std::path::{Path, PathBuf};
+use std::process::Command;
+
+/// Builder style configuration for a pending CMake build.
+pub struct Config {
+    path: PathBuf,
+    generator: Option<OsString>,
+    cflags: OsString,
+    cxxflags: OsString,
+    defines: Vec<(OsString, OsString)>,
+    deps: Vec<String>,
+    target: Option<String>,
+    host: Option<String>,
+    out_dir: Option<PathBuf>,
+    profile: Option<String>,
+    build_args: Vec<OsString>,
+    cmake_target: Option<String>,
+    env: Vec<(OsString, OsString)>,
+    static_crt: Option<bool>,
+    uses_cxx11: bool,
+}
+
+/// Builds the native library rooted at `path` with the default cmake options.
+/// This will return the directory in which the library was installed.
+///
+/// # Examples
+///
+/// ```no_run
+/// use cmake;
+///
+/// // Builds the project in the directory located in `libfoo`, installing it
+/// // into $OUT_DIR
+/// let dst = cmake::build("libfoo");
+///
+/// println!("cargo:rustc-link-search=native={}", dst.display());
+/// println!("cargo:rustc-link-lib=static=foo");
+/// ```
+///
+pub fn build<P: AsRef<Path>>(path: P) -> PathBuf {
+    Config::new(path.as_ref()).build()
+}
+
+impl Config {
+    /// Creates a new blank set of configuration to build the project specified
+    /// at the path `path`.
+    pub fn new<P: AsRef<Path>>(path: P) -> Config {
+        Config {
+            path: env::current_dir().unwrap().join(path),
+            generator: None,
+            cflags: OsString::new(),
+            cxxflags: OsString::new(),
+            defines: Vec::new(),
+            deps: Vec::new(),
+            profile: None,
+            out_dir: None,
+            target: None,
+            host: None,
+            build_args: Vec::new(),
+            cmake_target: None,
+            env: Vec::new(),
+            static_crt: None,
+            uses_cxx11: false
+        }
+    }
+
+    /// Sets the build-tool generator (`-G`) for this compilation.
+    pub fn generator<T: AsRef<OsStr>>(&mut self, generator: T) -> &mut Config {
+        self.generator = Some(generator.as_ref().to_owned());
+        self
+    }
+
+    /// Adds a custom flag to pass down to the C compiler, supplementing those
+    /// that this library already passes.
+    pub fn cflag<P: AsRef<OsStr>>(&mut self, flag: P) -> &mut Config {
+        self.cflags.push(" ");
+        self.cflags.push(flag.as_ref());
+        self
+    }
+
+    /// Adds a custom flag to pass down to the C++ compiler, supplementing those
+    /// that this library already passes.
+    pub fn cxxflag<P: AsRef<OsStr>>(&mut self, flag: P) -> &mut Config {
+        self.cxxflags.push(" ");
+        self.cxxflags.push(flag.as_ref());
+        self
+    }
+
+    /// Adds a new `-D` flag to pass to cmake during the generation step.
+    pub fn define<K, V>(&mut self, k: K, v: V) -> &mut Config
+        where K: AsRef<OsStr>, V: AsRef<OsStr>
+    {
+        self.defines.push((k.as_ref().to_owned(), v.as_ref().to_owned()));
+        self
+    }
+
+    /// Registers a dependency for this compilation on the native library built
+    /// by Cargo previously.
+    ///
+    /// This registration will modify the `CMAKE_PREFIX_PATH` environment
+    /// variable for the build system generation step.
+    pub fn register_dep(&mut self, dep: &str) -> &mut Config {
+        self.deps.push(dep.to_string());
+        self
+    }
+
+    /// Sets the target triple for this compilation.
+    ///
+    /// This is automatically scraped from `$TARGET` which is set for Cargo
+    /// build scripts so it's not necessary to call this from a build script.
+    pub fn target(&mut self, target: &str) -> &mut Config {
+        self.target = Some(target.to_string());
+        self
+    }
+
+    /// Sets the host triple for this compilation.
+    ///
+    /// This is automatically scraped from `$HOST` which is set for Cargo
+    /// build scripts so it's not necessary to call this from a build script.
+    pub fn host(&mut self, host: &str) -> &mut Config {
+        self.host = Some(host.to_string());
+        self
+    }
+
+    /// Sets the output directory for this compilation.
+    ///
+    /// This is automatically scraped from `$OUT_DIR` which is set for Cargo
+    /// build scripts so it's not necessary to call this from a build script.
+    pub fn out_dir<P: AsRef<Path>>(&mut self, out: P) -> &mut Config {
+        self.out_dir = Some(out.as_ref().to_path_buf());
+        self
+    }
+
+    /// Sets the profile for this compilation.
+    ///
+    /// This is automatically scraped from `$PROFILE` which is set for Cargo
+    /// build scripts so it's not necessary to call this from a build script.
+    pub fn profile(&mut self, profile: &str) -> &mut Config {
+        self.profile = Some(profile.to_string());
+        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 Config {
+        self.static_crt = Some(static_crt);
+        self
+    }
+
+    /// Add an argument to the final `cmake` build step
+    pub fn build_arg<A: AsRef<OsStr>>(&mut self, arg: A) -> &mut Config {
+        self.build_args.push(arg.as_ref().to_owned());
+        self
+    }
+
+    /// Configure an environment variable for the `cmake` processes spawned by
+    /// this crate in the `build` step.
+    pub fn env<K, V>(&mut self, key: K, value: V) -> &mut Config
+        where K: AsRef<OsStr>,
+              V: AsRef<OsStr>,
+    {
+        self.env.push((key.as_ref().to_owned(), value.as_ref().to_owned()));
+        self
+    }
+
+    /// Sets the build target for the final `cmake` build step, this will
+    /// default to "install" if not specified.
+    pub fn build_target(&mut self, target: &str) -> &mut Config {
+        self.cmake_target = Some(target.to_string());
+        self
+    }
+
+    /// Alters the default target triple on OSX to ensure that c++11 is
+    /// available. Does not change the target triple if it is explicitly
+    /// specified.
+    ///
+    /// This does not otherwise affect any CXX flags, i.e. it does not set
+    /// -std=c++11 or -stdlib=libc++.
+    pub fn uses_cxx11(&mut self) -> &mut Config {
+        self.uses_cxx11 = true;
+        self
+    }
+
+    /// Run this configuration, compiling the library with all the configured
+    /// options.
+    ///
+    /// This will run both the build system generator command as well as the
+    /// command to build the library.
+    pub fn build(&mut self) -> PathBuf {
+        let target = match self.target.clone() {
+            Some(t) => t,
+            None => {
+                let mut t = getenv_unwrap("TARGET");
+                if t.ends_with("-darwin") && self.uses_cxx11 {
+                    t = t + "11"
+                }
+                t
+            }
+        };
+        let host = self.host.clone().unwrap_or_else(|| {
+            getenv_unwrap("HOST")
+        });
+        let msvc = target.contains("msvc");
+        let mut c_cfg = cc::Build::new();
+        c_cfg.cargo_metadata(false)
+            .opt_level(0)
+            .debug(false)
+            .target(&target)
+            .warnings(false)
+            .host(&host);
+        let mut cxx_cfg = cc::Build::new();
+        cxx_cfg.cargo_metadata(false)
+            .cpp(true)
+            .opt_level(0)
+            .debug(false)
+            .target(&target)
+            .warnings(false)
+            .host(&host);
+        if let Some(static_crt) = self.static_crt {
+            c_cfg.static_crt(static_crt);
+            cxx_cfg.static_crt(static_crt);
+        }
+        let c_compiler = c_cfg.get_compiler();
+        let cxx_compiler = cxx_cfg.get_compiler();
+
+        let dst = self.out_dir.clone().unwrap_or_else(|| {
+            PathBuf::from(getenv_unwrap("OUT_DIR"))
+        });
+        let build = dst.join("build");
+        self.maybe_clear(&build);
+        let _ = fs::create_dir(&build);
+
+        // Add all our dependencies to our cmake paths
+        let mut cmake_prefix_path = Vec::new();
+        for dep in &self.deps {
+            if let Some(root) = env::var_os(&format!("DEP_{}_ROOT", dep)) {
+                cmake_prefix_path.push(PathBuf::from(root));
+            }
+        }
+        let system_prefix = env::var_os("CMAKE_PREFIX_PATH")
+                                .unwrap_or(OsString::new());
+        cmake_prefix_path.extend(env::split_paths(&system_prefix)
+                                     .map(|s| s.to_owned()));
+        let cmake_prefix_path = env::join_paths(&cmake_prefix_path).unwrap();
+
+        // Build up the first cmake command to build the build system.
+        let executable = env::var("CMAKE").unwrap_or("cmake".to_owned());
+        let mut cmd = Command::new(executable);
+        cmd.arg(&self.path)
+           .current_dir(&build);
+        if target.contains("windows-gnu") {
+            if host.contains("windows") {
+                // On MinGW we need to coerce cmake to not generate a visual
+                // studio build system but instead use makefiles that MinGW can
+                // use to build.
+                if self.generator.is_none() {
+                    cmd.arg("-G").arg("MSYS Makefiles");
+                }
+            } else {
+                // If we're cross compiling onto windows, then set some
+                // variables which will hopefully get things to succeed. Some
+                // systems may need the `windres` or `dlltool` variables set, so
+                // set them if possible.
+                if !self.defined("CMAKE_SYSTEM_NAME") {
+                    cmd.arg("-DCMAKE_SYSTEM_NAME=Windows");
+                }
+                if !self.defined("CMAKE_RC_COMPILER") {
+                    let exe = find_exe(c_compiler.path());
+                    if let Some(name) = exe.file_name().unwrap().to_str() {
+                        let name = name.replace("gcc", "windres");
+                        let windres = exe.with_file_name(name);
+                        if windres.is_file() {
+                            let mut arg = OsString::from("-DCMAKE_RC_COMPILER=");
+                            arg.push(&windres);
+                            cmd.arg(arg);
+                        }
+                    }
+                }
+            }
+        } else if msvc {
+            // If we're on MSVC we need to be sure to use the right generator or
+            // otherwise we won't get 32/64 bit correct automatically.
+            // This also guarantees that NMake generator isn't chosen implicitly.
+            if self.generator.is_none() {
+                cmd.arg("-G").arg(self.visual_studio_generator(&target));
+            }
+        } else if target.contains("redox") {
+            if !self.defined("CMAKE_SYSTEM_NAME") {
+                cmd.arg("-DCMAKE_SYSTEM_NAME=Generic");
+            }
+        }
+        let mut is_ninja = false;
+        if let Some(ref generator) = self.generator {
+            cmd.arg("-G").arg(generator);
+            is_ninja = generator.to_string_lossy().contains("Ninja");
+        }
+        let profile = self.profile.clone().unwrap_or_else(|| {
+            match &getenv_unwrap("PROFILE")[..] {
+                "bench" | "release" => "Release",
+                _ => "Debug",
+            }.to_string()
+        });
+        for &(ref k, ref v) in &self.defines {
+            let mut os = OsString::from("-D");
+            os.push(k);
+            os.push("=");
+            os.push(v);
+            cmd.arg(os);
+        }
+
+        if !self.defined("CMAKE_INSTALL_PREFIX") {
+            let mut dstflag = OsString::from("-DCMAKE_INSTALL_PREFIX=");
+            dstflag.push(&dst);
+            cmd.arg(dstflag);
+        }
+
+        let build_type = self.defines.iter().find(|&&(ref a, _)| {
+            a == "CMAKE_BUILD_TYPE"
+        }).map(|x| x.1.to_str().unwrap()).unwrap_or(&profile);
+        let build_type_upcase = build_type.chars()
+                                          .flat_map(|c| c.to_uppercase())
+                                          .collect::<String>();
+
+        {
+            // let cmake deal with optimization/debuginfo
+            let skip_arg = |arg: &OsStr| {
+                match arg.to_str() {
+                    Some(s) => {
+                        s.starts_with("-O") || s.starts_with("/O") || s == "-g"
+                    }
+                    None => false,
+                }
+            };
+            let mut set_compiler = |kind: &str,
+                                    compiler: &cc::Tool,
+                                    extra: &OsString| {
+                let flag_var = format!("CMAKE_{}_FLAGS", kind);
+                let tool_var = format!("CMAKE_{}_COMPILER", kind);
+                if !self.defined(&flag_var) {
+                    let mut flagsflag = OsString::from("-D");
+                    flagsflag.push(&flag_var);
+                    flagsflag.push("=");
+                    flagsflag.push(extra);
+                    for arg in compiler.args() {
+                        if skip_arg(arg) {
+                            continue
+                        }
+                        flagsflag.push(" ");
+                        flagsflag.push(arg);
+                    }
+                    cmd.arg(flagsflag);
+                }
+
+                // The visual studio generator apparently doesn't respect
+                // `CMAKE_C_FLAGS` but does respect `CMAKE_C_FLAGS_RELEASE` and
+                // such. We need to communicate /MD vs /MT, so set those vars
+                // here.
+                //
+                // Note that for other generators, though, this *overrides*
+                // things like the optimization flags, which is bad.
+                if self.generator.is_none() && msvc {
+                    let flag_var_alt = format!("CMAKE_{}_FLAGS_{}", kind,
+                                               build_type_upcase);
+                    if !self.defined(&flag_var_alt) {
+                        let mut flagsflag = OsString::from("-D");
+                        flagsflag.push(&flag_var_alt);
+                        flagsflag.push("=");
+                        flagsflag.push(extra);
+                        for arg in compiler.args() {
+                            if skip_arg(arg) {
+                                continue
+                            }
+                            flagsflag.push(" ");
+                            flagsflag.push(arg);
+                        }
+                        cmd.arg(flagsflag);
+                    }
+                }
+
+                // Apparently cmake likes to have an absolute path to the
+                // compiler as otherwise it sometimes thinks that this variable
+                // changed as it thinks the found compiler, /usr/bin/cc,
+                // differs from the specified compiler, cc. Not entirely sure
+                // what's up, but at least this means cmake doesn't get
+                // confused?
+                //
+                // Also specify this on Windows only if we use MSVC with Ninja,
+                // as it's not needed for MSVC with Visual Studio generators and
+                // for MinGW it doesn't really vary.
+                if !self.defined("CMAKE_TOOLCHAIN_FILE")
+                   && !self.defined(&tool_var)
+                   && (env::consts::FAMILY != "windows" || (msvc && is_ninja)) {
+                    let mut ccompiler = OsString::from("-D");
+                    ccompiler.push(&tool_var);
+                    ccompiler.push("=");
+                    ccompiler.push(find_exe(compiler.path()));
+                    #[cfg(windows)] {
+                        // CMake doesn't like unescaped `\`s in compiler paths
+                        // so we either have to escape them or replace with `/`s.
+                        use std::os::windows::ffi::{OsStrExt, OsStringExt};
+                        let wchars = ccompiler.encode_wide().map(|wchar| {
+                            if wchar == b'\\' as u16 { '/' as u16 } else { wchar }
+                        }).collect::<Vec<_>>();
+                        ccompiler = OsString::from_wide(&wchars);
+                    }
+                    cmd.arg(ccompiler);
+                }
+            };
+
+            set_compiler("C", &c_compiler, &self.cflags);
+            set_compiler("CXX", &cxx_compiler, &self.cxxflags);
+        }
+
+        if !self.defined("CMAKE_BUILD_TYPE") {
+            cmd.arg(&format!("-DCMAKE_BUILD_TYPE={}", profile));
+        }
+
+        if !self.defined("CMAKE_TOOLCHAIN_FILE") {
+            if let Ok(s) = env::var("CMAKE_TOOLCHAIN_FILE") {
+                cmd.arg(&format!("-DCMAKE_TOOLCHAIN_FILE={}", s));
+            }
+        }
+
+        for &(ref k, ref v) in c_compiler.env().iter().chain(&self.env) {
+            cmd.env(k, v);
+        }
+
+        run(cmd.env("CMAKE_PREFIX_PATH", cmake_prefix_path), "cmake");
+
+        let mut makeflags = None;
+        let mut parallel_args = Vec::new();
+        if let Ok(s) = env::var("NUM_JOBS") {
+            match self.generator.as_ref().map(|g| g.to_string_lossy()) {
+                Some(ref g) if g.contains("Ninja") => {
+                    parallel_args.push(format!("-j{}", s));
+                }
+                Some(ref g) if g.contains("Visual Studio") => {
+                    parallel_args.push(format!("/m:{}", s));
+				}
+				Some(ref g) if g.contains("NMake") => {
+					// NMake creates `Makefile`s, but doesn't understand `-jN`.
+				}
+                _ if fs::metadata(&dst.join("build/Makefile")).is_ok() => {
+                    match env::var_os("CARGO_MAKEFLAGS") {
+                        // Only do this on non-windows as we could actually be
+                        // invoking make instead of mingw32-make which doesn't
+                        // work with our jobserver
+                        Some(ref s) if !cfg!(windows) => makeflags = Some(s.clone()),
+
+                        // This looks like `make`, let's hope it understands `-jN`.
+                        _ => parallel_args.push(format!("-j{}", s)),
+                    }
+                }
+                _ => {}
+            }
+        }
+
+        // And build!
+        let target = self.cmake_target.clone().unwrap_or("install".to_string());
+        let mut cmd = Command::new("cmake");
+        for &(ref k, ref v) in c_compiler.env().iter().chain(&self.env) {
+            cmd.env(k, v);
+        }
+        if let Some(flags) = makeflags {
+            cmd.env("MAKEFLAGS", flags);
+        }
+        run(cmd.arg("--build").arg(".")
+               .arg("--target").arg(target)
+               .arg("--config").arg(&profile)
+               .arg("--").args(&self.build_args)
+               .args(&parallel_args)
+               .current_dir(&build), "cmake");
+
+        println!("cargo:root={}", dst.display());
+        return dst
+    }
+
+    fn visual_studio_generator(&self, target: &str) -> String {
+        use cc::windows_registry::{find_vs_version, VsVers};
+
+        let base = match find_vs_version() {
+            Ok(VsVers::Vs15) => "Visual Studio 15 2017",
+            Ok(VsVers::Vs14) => "Visual Studio 14 2015",
+            Ok(VsVers::Vs12) => "Visual Studio 12 2013",
+            Ok(_) => panic!("Visual studio version detected but this crate \
+                             doesn't know how to generate cmake files for it, \
+                             can the `cmake` crate be updated?"),
+            Err(msg) => panic!(msg),
+        };
+        if target.contains("i686") {
+            base.to_string()
+        } else if target.contains("x86_64") {
+            format!("{} Win64", base)
+        } else {
+            panic!("unsupported msvc target: {}", target);
+        }
+    }
+
+    fn defined(&self, var: &str) -> bool {
+        self.defines.iter().any(|&(ref a, _)| a == var)
+    }
+
+    // If a cmake project has previously been built (e.g. CMakeCache.txt already
+    // exists), then cmake will choke if the source directory for the original
+    // project being built has changed. Detect this situation through the
+    // `CMAKE_HOME_DIRECTORY` variable that cmake emits and if it doesn't match
+    // we blow away the build directory and start from scratch (the recommended
+    // solution apparently [1]).
+    //
+    // [1]: https://cmake.org/pipermail/cmake/2012-August/051545.html
+    fn maybe_clear(&self, dir: &Path) {
+        // CMake will apparently store canonicalized paths which normally
+        // isn't relevant to us but we canonicalize it here to ensure
+        // we're both checking the same thing.
+        let path = fs::canonicalize(&self.path).unwrap_or(self.path.clone());
+        let mut f = match File::open(dir.join("CMakeCache.txt")) {
+            Ok(f) => f,
+            Err(..) => return,
+        };
+        let mut u8contents = Vec::new();
+        match f.read_to_end(&mut u8contents) {
+            Ok(f) => f,
+            Err(..) => return,
+        };
+        let contents = String::from_utf8_lossy(&u8contents);
+        drop(f);
+        for line in contents.lines() {
+            if line.starts_with("CMAKE_HOME_DIRECTORY") {
+                let needs_cleanup = match line.split('=').next_back() {
+                    Some(cmake_home) => {
+                        fs::canonicalize(cmake_home)
+                            .ok()
+                            .map(|cmake_home| cmake_home != path)
+                            .unwrap_or(true)
+                    },
+                    None => true
+                };
+                if needs_cleanup {
+                    println!("detected home dir change, cleaning out entire build \
+                              directory");
+                    fs::remove_dir_all(dir).unwrap();
+                }
+                break
+            }
+        }
+    }
+}
+
+fn run(cmd: &mut Command, program: &str) {
+    println!("running: {:?}", cmd);
+    let status = match cmd.status() {
+        Ok(status) => status,
+        Err(ref e) if e.kind() == ErrorKind::NotFound => {
+            fail(&format!("failed to execute command: {}\nis `{}` not installed?",
+                          e, program));
+        }
+        Err(e) => fail(&format!("failed to execute command: {}", e)),
+    };
+    if !status.success() {
+        fail(&format!("command did not execute successfully, got: {}", status));
+    }
+}
+
+fn find_exe(path: &Path) -> PathBuf {
+    env::split_paths(&env::var_os("PATH").unwrap_or(OsString::new()))
+        .map(|p| p.join(path))
+        .find(|p| fs::metadata(p).is_ok())
+        .unwrap_or(path.to_owned())
+}
+
+fn getenv_unwrap(v: &str) -> String {
+    match env::var(v) {
+        Ok(s) => s,
+        Err(..) => fail(&format!("environment variable `{}` not defined", v)),
+    }
+}
+
+fn fail(s: &str) -> ! {
+    panic!("\n{}\n\nbuild script failed, must exit now", s)
+}