Merge pull request #21 from alexcrichton/master

Implement RFC 1291 changes

49 files changed, 5330 insertions, 31 deletions

diff --git a/.gitignore b/.gitignore
index 4fffb2f89c..a9d37c560c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,2 @@
-/target
-/Cargo.lock
+target
+Cargo.lock
diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index 8822b0ca7d..0000000000
--- a/.gitmodules
+++ /dev/null
@@ -1,3 +0,0 @@
-[submodule "rust"]
-	path = rust
-	url = https://github.com/rust-lang/rust
diff --git a/.travis.yml b/.travis.yml
index 64422b3506..cb303ac4d0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,21 +1,48 @@
 language: rust
-sudo: false
-before_install:
-  - git submodule update --init --recursive
+sudo: required
+rust:
+  - 1.0.0
+  - beta
+  - nightly
+services:
+  - docker
 script:
-  - cargo build --verbose
-  - cargo doc --verbose
-after_success: |
-  [ $TRAVIS_BRANCH = master ] &&
-  [ $TRAVIS_PULL_REQUEST = false ] &&
-  echo '<meta http-equiv=refresh content=0;url=libc/index.html>' > target/doc/index.html &&
-  pip install ghp-import --user $USER &&
-  $HOME/.local/bin/ghp-import -n target/doc &&
-  git push -fq https://${TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages
-
+  - sh ci/run-travis.sh
+os:
+  - linux
+  - osx
 env:
+  matrix:
+    - ARCH=x86_64
+    - ARCH=i686
   global:
-    secure: MZGg+symX6/fcY7TsQ1LkJ28V/CUevNZgs3MiilgvnlgTjqn7BU7gbTvwhLdVZq04/EQ1hTeVzrFGpBfcCUVHYKmP2vooEFJJ+bDGEvyD8ChwCB4nV+NmxF5+NwCi3+Y+0pBgKbt2BasJ+MXkGJpRyFozis6loMWbXTzZzL9jjU=
+    secure: 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
+matrix:
+  include:
+    - os: linux
+      env: TARGET=arm-linux-androideabi
+      rust: nightly
+    - os: linux
+      env: TARGET=x86_64-unknown-linux-musl
+      rust: nightly
+    - os: linux
+      env: TARGET=arm-unknown-linux-gnueabihf
+      rust: nightly
+    - os: linux
+      env: TARGET=mips-unknown-linux-gnu
+      rust: nightly
+    - os: linux
+      env: TARGET=aarch64-unknown-linux-gnu
+      rust: nightly
+    - os: osx
+      env: TARGET=i386-apple-ios
+      rust: nightly-2015-09-08
+    - os: osx
+      env: TARGET=x86_64-apple-ios
+      rust: nightly-2015-09-08
 notifications:
   email:
     on_success: never
+branches:
+  only:
+    - master
diff --git a/Cargo.toml b/Cargo.toml
index 6fd2996e5f..4c86c76a9f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,12 +12,6 @@ description = """
 A library for types and bindings to native C functions often found in libc or
 other common platform libraries.
 """
-include = ["Cargo.toml", "rust/src/liblibc/*"]
 
 [features]
-default = ["cargo-build"]
-cargo-build = []
-
-[lib]
-name = "libc"
-path = "rust/src/liblibc/lib.rs"
+default = []
diff --git a/README.md b/README.md
index 3a0cc20cf6..4d87a8b969 100644
--- a/README.md
+++ b/README.md
@@ -5,21 +5,112 @@ A Rust library with native bindings to the types and functions commonly found on
 various systems, including libc.
 
 [![Build Status](https://travis-ci.org/rust-lang/libc.svg?branch=master)](https://travis-ci.org/rust-lang/libc)
+[![Build status](https://ci.appveyor.com/api/projects/status/v0414slj8y8nga0p?svg=true)](https://ci.appveyor.com/project/alexcrichton/libc)
 
-[Documentation](http://doc.rust-lang.org/libc)
+[Documentation](#platforms-and-documentation)
 
 ## Usage
 
-Add this to your `Cargo.toml`:
+First, add the following to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-
-libc = "0.1"
+libc = "1.0"
 ```
 
-and this to your crate root:
+Next, add this to your crate root:
 
 ```rust
 extern crate libc;
 ```
+
+## What is libc?
+
+The primary purpose of this crate is to provide all of the definitions necessary
+to easily interoperate with C code (or "C-like" code) on each of the platforms
+that Rust supports. This includes type definitions (e.g. `c_int`), constants
+(e.g. `EINVAL`) as well as function headers (e.g. `malloc`).
+
+This crate does not strive to have any form of compatibility across platforms,
+but rather it is simply a straight binding to the system libraries on the
+platform in question.
+
+## Public API
+
+This crate exports all underlying platform types, functions, and constants under
+the crate root, so all items are accessible as `libc::foo`. The types and values
+of all the exported APIs match the platform that libc is compiled for.
+
+More detailed information about the design of this library can be found in its
+[associated RFC][rfc].
+
+[rfc]: https://github.com/rust-lang/rfcs/blob/master/text/1291-promote-libc.md
+
+## Adding an API
+
+Want to use an API which currently isn't bound in `libc`? It's quite easy to add
+one!
+
+The internal structure of this crate is designed to minimize the number of
+`#[cfg]` attributes in order to easily be able to add new items which apply
+to all platforms in the future. As a result, the crate is organized
+hierarchically based on platform. Each module has a number of `#[cfg]`'d
+children, but only one is ever actually compiled. Each module then reexports all
+the contents of its children.
+
+This means that for each platform that libc supports, the path from a
+leaf module to the root will contain all bindings for the platform in question.
+Consequently, this indicates where an API should be added! Adding an API at a
+particular level in the hierarchy means that it is supported on all the child
+platforms of that level. For example, when adding a Unix API it should be added
+to `src/unix/mod.rs`, but when adding a Linux-only API it should be added to
+`src/unix/notbsd/linux/mod.rs`.
+
+If you're not 100% sure at what level of the hierarchy an API should be added
+at, fear not! This crate has CI support which tests any binding against all
+platforms supported, so you'll see failures if an API is added at the wrong
+level or has different signatures across platforms.
+
+With that in mind, the steps for adding a new API are:
+
+1. Determine where in the module hierarchy your API should be added.
+2. Add the API.
+3. Send a PR to this repo.
+4. Wait for CI to pass, fixing errors.
+5. Wait for a merge!
+
+## Platforms and Documentation
+
+The following platforms are currently tested and have documentation available:
+
+Tested:
+  * [`i686-pc-windows-msvc`](https://doc.rust-lang.org/libc/i686-pc-windows-msvc/libc)
+  * [`x86_64-pc-windows-msvc`](https://doc.rust-lang.org/libc/x86_64-pc-windows-msvc/libc)
+    (Windows)
+  * [`i686-pc-windows-gnu`](https://doc.rust-lang.org/libc/i686-pc-windows-gnu/libc)
+  * [`x86_64-pc-windows-gnu`](https://doc.rust-lang.org/libc/x86_64-pc-windows-gnu/libc)
+  * [`i686-apple-darwin`](https://doc.rust-lang.org/libc/i686-apple-darwin/libc)
+  * [`x86_64-apple-darwin`](https://doc.rust-lang.org/libc/x86_64-apple-darwin/libc)
+    (OSX)
+  * [`i686-apple-ios`](https://doc.rust-lang.org/libc/i686-apple-ios/libc)
+  * [`x86_64-apple-ios`](https://doc.rust-lang.org/libc/x86_64-apple-ios/libc)
+    (iOS)
+  * [`i686-unknown-linux-gnu`](https://doc.rust-lang.org/libc/i686-unknown-linux-gnu/libc)
+  * [`x86_64-unknown-linux-gnu`](https://doc.rust-lang.org/libc/x86_64-unknown-linux-gnu/libc)
+    (Linux)
+  * [`x86_64-unknown-linux-musl`](https://doc.rust-lang.org/libc/x86_64-unknown-linux-musl/libc)
+    (Linux MUSL)
+  * [`aarch64-unknown-linux-gnu`](https://doc.rust-lang.org/libc/aarch64-unknown-linux-gnu/libc)
+  * [`mips-unknown-linux-gnu`](https://doc.rust-lang.org/libc/mips-unknown-linux-gnu/libc)
+  * [`arm-unknown-linux-gnueabihf`](https://doc.rust-lang.org/libc/arm-unknown-linux-gnueabihf/libc)
+  * [`arm-linux-androideabi`](https://doc.rust-lang.org/libc/arm-linux-androideabi/libc)
+    (Android)
+
+The following may be supported, but are not guaranteed to always work:
+
+  * `x86_64-unknown-freebsd`
+  * `i686-unknown-freebsd`
+  * `x86_64-unknown-bitrig`
+  * `x86_64-unknown-dragonfly`
+  * `x86_64-unknown-openbsd`
+  * `x86_64-unknown-netbsd`
diff --git a/appveyor.yml b/appveyor.yml
new file mode 100644
index 0000000000..74811ed105
--- /dev/null
+++ b/appveyor.yml
@@ -0,0 +1,25 @@
+environment:
+  matrix:
+  - TARGET: x86_64-pc-windows-gnu
+    MSYS2_BITS: 64
+  - TARGET: i686-pc-windows-gnu
+    MSYS2_BITS: 32
+  - TARGET: x86_64-pc-windows-msvc
+  - TARGET: i686-pc-windows-msvc
+install:
+  - ps: Start-FileDownload "https://static.rust-lang.org/dist/rust-nightly-${env:TARGET}.exe"
+  - rust-nightly-%TARGET%.exe /VERYSILENT /NORESTART /DIR="C:\Program Files (x86)\Rust"
+  - SET PATH=%PATH%;C:\Program Files (x86)\Rust\bin
+  - if defined MSYS2_BITS set PATH=%PATH%;C:\msys64\mingw%MSYS2_BITS%\bin
+  - rustc -V
+  - cargo -V
+
+build: false
+
+test_script:
+  - cargo test
+  - cargo run --manifest-path libc-test/Cargo.toml
+
+branches:
+  only:
+    - master
diff --git a/ci/README.md b/ci/README.md
new file mode 100644
index 0000000000..5b4c681c25
--- /dev/null
+++ b/ci/README.md
@@ -0,0 +1,68 @@
+The goal of the libc crate is to have CI running everywhere to have the
+strongest guarantees about the definitions that this library contains, and as a
+result the CI is pretty complicated and also pretty large! Hopefully this can
+serve as a guide through the sea of scripts in this directory and elsewhere in
+this project.
+
+# Files
+
+First up, let's talk about the files in this directory:
+
+* `msys2.ps1` - a PowerShell script which is used to install MSYS2 on the
+  AppVeyor bots. As of this writing MSYS2 isn't installed by default, and this
+  script will install the right version/arch of msys2 in preparation of using
+  the contained C compiler to compile C shims.
+
+* `run-travis.sh` - a shell script run by all Travis builders, this is
+  responsible for setting up the rest of the environment such as installing new
+  packages, downloading Rust target libraries, etc.
+
+* `run.sh` - the actual script which runs tests for a particular architecture.
+  Called from the `run-travis.sh` script this will run all tests for the target
+  specified.
+
+* `cargo-config` - Cargo configuration of linkers to use copied into place by
+  the `run-travis.sh` script before builds are run.
+
+* `dox.sh` - script called from `run-travis.sh` on only the linux 64-bit nightly
+  Travis bots to build documentation for this crate.
+
+* `landing-page-*.html` - used by `dox.sh` to generate a landing page for all
+  architectures' documentation.
+
+# CI Systems
+
+Currently this repository leverages a combination of Travis CI and AppVeyor for
+running tests. The triples tested are:
+
+* AppVeyor
+  * `{i686,x86_64}-pc-windows-{msvc,gnu}`
+* Travis
+  *  `{i686,x86_64,mips,aarch64}-unknown-linux-gnu`
+  *  `x86_64-unknown-linux-musl`
+  *  `arm-unknown-linux-gnueabihf`
+  *  `arm-linux-androideabi`
+  *  `{i686,x86_64}-apple-{darwin,ios}`
+
+The Windows triples are all pretty standard, they just set up their environment
+then run tests, no need for downloading any extra target libs (we just download
+the right installer). The Intel Linux/OSX builds are similar in that we just
+download the right target libs and run tests. Note that the Intel Linux/OSX
+builds are run on stable/beta/nightly, but are the only ones that do so.
+
+The remaining architectures look like:
+
+* Android runs in a [docker image][android-docker] with an emulator, the NDK,
+  and the SDK already set up. The entire build happens within the docker image.
+* The MIPS, ARM, and AArch64 builds all use QEMU to run the generated binary to
+  actually verify the tests pass.
+* The MUSL build just has to download a MUSL compiler and target libraries and
+  then otherwise runs tests normally.
+* iOS builds need an extra linker flag currently, but beyond that they're built
+  as standard as everything else.
+
+[android-docker]: https://github.com/rust-lang/rust-buildbot/blob/master/slaves/android/Dockerfile
+
+Hopefully that's at least somewhat of an introduction to everything going on
+here, and feel free to ping @alexcrichton with questions!
+
diff --git a/ci/Vagrantfile b/ci/Vagrantfile
new file mode 100644
index 0000000000..70cfcf3284
--- /dev/null
+++ b/ci/Vagrantfile
@@ -0,0 +1,38 @@
+# A vagrant configuration file for running tests on BSD-like machines
+#
+# Note that this was originally intended to later be used to run tests on
+# Travis, but it didn't work out. Regardless this has stuck around! You can run
+# tests in FreeBSD via:
+#
+#     git clone https://github.com/alexcrichton/libc
+#     cd libc/ci
+#     vagrant up freebsd
+#     vagrant ssh freebsd
+#     ...
+#     cd /vagrant/libc-test
+#     cargo run
+#
+# And "that's it"! You look up instructions on Vagrant's website for how to
+# install vagrant.
+
+Vagrant.configure(2) do |config|
+  # For a complete reference, please see the online documentation at
+  # https://docs.vagrantup.com.
+
+  config.vm.synced_folder "..", "/vagrant"
+
+  config.vm.define :freebsd do |bsd|
+    bsd.vm.box = "arkadi/freebsd-10.1-amd64"
+    bsd.vm.provision :shell, inline: 'yes | sudo pkg install rust cargo'
+    bsd.vm.provider "virtualbox" do |vb|
+      vb.memory = "2048"
+    end
+  end
+
+  config.vm.define :openbsd do |bsd|
+    bsd.vm.box = "bodgit/openbsd-5.7-amd64"
+    bsd.vm.provider "virtualbox" do |vb|
+      vb.memory = "2048"
+    end
+  end
+end
diff --git a/ci/cargo-config b/ci/cargo-config
new file mode 100644
index 0000000000..e738f18902
--- /dev/null
+++ b/ci/cargo-config
@@ -0,0 +1,13 @@
+# Configuration of which linkers to call on Travis for various architectures
+
+[target.arm-linux-androideabi]
+linker = "arm-linux-androideabi-gcc"
+
+[target.arm-unknown-linux-gnueabihf]
+linker = "arm-linux-gnueabihf-gcc-4.7"
+
+[target.mips-unknown-linux-gnu]
+linker = "mips-linux-gnu-gcc"
+
+[target.aarch64-unknown-linux-gnu]
+linker = "aarch64-linux-gnu-gcc"
diff --git a/ci/dox.sh b/ci/dox.sh
new file mode 100644
index 0000000000..6edcb159dd
--- /dev/null
+++ b/ci/dox.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+# Builds documentation for all target triples that we have a registered URL for
+# in liblibc. This scrapes the list of triples to document from `src/lib.rs`
+# which has a bunch of `html_root_url` directives we pick up.
+
+set -e
+
+TARGETS=`grep html_root_url src/lib.rs | sed 's/.*".*\/\(.*\)"/\1/'`
+
+rm -rf target/doc
+mkdir -p target/doc
+
+cp ci/landing-page-head.html target/doc/index.html
+
+for target in $TARGETS; do
+  echo documenting $target
+
+  rustdoc -o target/doc/$target --target $target src/lib.rs --cfg dox \
+    --crate-name libc
+
+  echo "<li><a href="$target/libc/index.html">$target</a></li>" \
+    >> target/doc/index.html
+done
+
+cat ci/landing-page-footer.html >> target/doc/index.html
+
+# If we're on travis, not a PR, and on the right branch, publish!
+if [ "$TRAVIS_PULL_REQUEST" = "false" ] && [ "$TRAVIS_BRANCH" = "master" ]; then
+  pip install ghp-import --user $USER
+  $HOME/.local/bin/ghp-import -n target/doc
+  git push -qf https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages
+fi
diff --git a/ci/landing-page-footer.html b/ci/landing-page-footer.html
new file mode 100644
index 0000000000..fc69fa88eb
--- /dev/null
+++ b/ci/landing-page-footer.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+  </head>
+  <body>
+    <ul>
diff --git a/ci/landing-page-head.html b/ci/landing-page-head.html
new file mode 100644
index 0000000000..de3c63c01f
--- /dev/null
+++ b/ci/landing-page-head.html
@@ -0,0 +1,4 @@
+    </ul>
+  </body>
+</html>
+
diff --git a/ci/run-all.sh b/ci/run-all.sh
new file mode 100644
index 0000000000..a66788fde6
--- /dev/null
+++ b/ci/run-all.sh
@@ -0,0 +1,45 @@
+# This is **not** meant to be run on CI, but rather locally instead. If you're
+# on a Linux machine you'll be able to run most of these, but otherwise this'll
+# just attempt to run as many platforms as possible!
+
+run() {
+    _target=$1
+    _cc=$2
+    if [ "$_cc" != "" ]; then
+        which $_cc > /dev/null
+        if [ $? -ne 0 ]; then
+           echo "$_cc not installed, skipping $_target"
+           return
+        fi
+        export CC=$_cc
+    fi
+    if [ ! -d .cargo ]; then
+        mkdir .cargo
+        cp ci/cargo-config .cargo/config
+    fi
+    sh ci/run.sh $_target
+}
+
+OS=`uname`
+if [ "$OS" = "Linux" ]; then
+    # For more info on where to get all these cross compilers see
+    # ci/run-travis.sh and what packages are needed on ubuntu
+    run x86_64-unknown-linux-gnu clang
+    run i686-unknown-linux-gnu clang
+    run x86_64-unknown-linux-musl musl-gcc
+    run mips-unknown-linux-gnu mips-linux-gnu-gcc
+    run aarch64-unknown-linux-gnu aarch64-linux-gnueabihf-gcc
+    run arm-unknown-linux-gnueabihf arm-linux-gnueabihf-gcc-4.7
+
+    # Prep for this by running `vagrant up freebsd` in the `ci` directory
+    (cd ci && vagrant ssh freebsd -c \
+        "cd /vagrant && sh ci/run.sh x86_64-unknown-freebsd")
+
+    # Make sure you've run `docker pull alexcrichton/rust-libc-test` to get
+    # this image ahead of time.
+    docker run -itv `pwd`:/clone alexcrichton/rust-libc-test \
+        sh ci/run.sh arm-linux-androideabi
+elif [ "$OS" = "Darwin" ]; then
+    cargo run --target x86_64-unknown-linux-gnu
+    cargo run --target i686-unknown-linux-gnu
+fi
diff --git a/ci/run-travis.sh b/ci/run-travis.sh
new file mode 100644
index 0000000000..975accb664
--- /dev/null
+++ b/ci/run-travis.sh
@@ -0,0 +1,118 @@
+# Entry point for all travis builds, this will set up the Travis environment by
+# downloading any dependencies. It will then execute the `run.sh` script to
+# build and execute all tests.
+
+set -ex
+
+if [ "$TRAVIS_OS_NAME" = "linux" ]; then
+  OS=unknown-linux-gnu
+else
+  OS=apple-darwin
+fi
+
+export HOST=$ARCH-$OS
+if [ "$TARGET" = "" ]; then
+  TARGET=$HOST
+fi
+
+MAIN_TARGETS=https://static.rust-lang.org/dist
+EXTRA_TARGETS=https://people.mozilla.org/~acrichton/libc-test/2015-09-08
+
+install() {
+  sudo apt-get update
+  sudo apt-get install -y $@
+}
+
+case "$TARGET" in
+  *-apple-ios)
+    curl -s $EXTRA_TARGETS/$TARGET.tar.gz | tar xzf - -C $HOME/rust/lib/rustlib
+    ;;
+
+  *)
+    # Download the rustlib folder from the relevant portion of main distribution's
+    # tarballs.
+    dir=rust-std-$TARGET
+    pkg=rust-std
+    if [ "$TRAVIS_RUST_VERSION" = "1.0.0" ]; then
+      pkg=rust
+      dir=rustc
+    fi
+    curl -s $MAIN_TARGETS/$pkg-$TRAVIS_RUST_VERSION-$TARGET.tar.gz | \
+      tar xzf - -C $HOME/rust/lib/rustlib --strip-components=4 \
+        $pkg-$TRAVIS_RUST_VERSION-$TARGET/$dir/lib/rustlib/$TARGET
+    ;;
+
+esac
+
+case "$TARGET" in
+  # Pull a pre-built docker image for testing android, then run tests entirely
+  # within that image. Note that this is using the same rustc installation that
+  # travis has (sharing it via `-v`) and otherwise the tests run entirely within
+  # the container.
+  arm-linux-androideabi)
+    script="
+cp -r /checkout/* .
+mkdir .cargo
+cp ci/cargo-config .cargo/config
+sh ci/run.sh $TARGET
+"
+    exec docker run \
+      --entrypoint bash \
+      -v $HOME/rust:/usr/local:ro \
+      -v `pwd`:/checkout:ro \
+      -e LD_LIBRARY_PATH=/usr/local/lib \
+      -it alexcrichton/rust-slave-android:2015-10-21 \
+      -c "$script"
+    ;;
+
+  x86_64-unknown-linux-musl)
+    install musl-tools
+    export CC=musl-gcc
+    ;;
+
+  arm-unknown-linux-gnueabihf)
+    install gcc-4.7-arm-linux-gnueabihf qemu-user
+    export CC=arm-linux-gnueabihf-gcc-4.7
+    ;;
+
+  aarch64-unknown-linux-gnu)
+    install gcc-aarch64-linux-gnu qemu-user
+    export CC=aarch64-linux-gnu-gcc
+    ;;
+
+  *-apple-ios)
+    ;;
+
+  mips-unknown-linux-gnu)
+    # Download pre-built and custom MIPS libs and then also instsall the MIPS
+    # compiler according to this post:
+    # http://sathisharada.blogspot.com/2014_10_01_archive.html
+    echo 'deb http://ftp.de.debian.org/debian squeeze main' | \
+      sudo tee -a /etc/apt/sources.list
+    echo 'deb http://www.emdebian.org/debian/ squeeze main' | \
+      sudo tee -a /etc/apt/sources.list
+    install emdebian-archive-keyring
+    install qemu-user gcc-4.4-mips-linux-gnu -y --force-yes
+    export CC=mips-linux-gnu-gcc
+    ;;
+
+  *)
+    # clang has better error messages and implements alignof more broadly
+    export CC=clang
+
+    if [ "$TARGET" = "i686-unknown-linux-gnu" ]; then
+      install gcc-multilib
+    fi
+    ;;
+
+esac
+
+mkdir .cargo
+cp ci/cargo-config .cargo/config
+sh ci/run.sh $TARGET
+
+if [ "$TARGET" = "x86_64-unknown-linux-gnu" ] && \
+   [ "$TRAVIS_RUST_VERSION" = "nightly" ] && \
+   [ "$TRAVIS_OS_NAME" = "linux" ]; then
+  sh ci/dox.sh
+fi
diff --git a/ci/run.sh b/ci/run.sh
new file mode 100644
index 0000000000..6dd177bffa
--- /dev/null
+++ b/ci/run.sh
@@ -0,0 +1,48 @@
+#!/bin/sh
+
+# Builds and runs tests for a particular target passed as an argument to this
+# script.
+
+set -ex
+
+TARGET=$1
+case "$TARGET" in
+  *-apple-ios)
+    cargo rustc --manifest-path libc-test/Cargo.toml --target $TARGET -- \
+        -C link-args=-mios-simulator-version-min=7.0
+    ;;
+
+  *)
+    cargo build --manifest-path libc-test/Cargo.toml --target $TARGET
+    ;;
+esac
+
+case "$TARGET" in
+  arm-linux-androideabi)
+    emulator @arm-18 -no-window &
+    adb wait-for-device
+    adb push libc-test/target/$TARGET/debug/libc-test /data/libc-test
+    adb shell /data/libc-test
+    ;;
+
+  arm-unknown-linux-gnueabihf)
+    qemu-arm -L /usr/arm-linux-gnueabihf libc-test/target/$TARGET/debug/libc-test
+    ;;
+
+  mips-unknown-linux-gnu)
+    qemu-mips -L /usr/mips-linux-gnu libc-test/target/$TARGET/debug/libc-test
+    ;;
+
+  aarch64-unknown-linux-gnu)
+    qemu-aarch64 -L /usr/aarch64-linux-gnu/ \
+      libc-test/target/$TARGET/debug/libc-test
+    ;;
+
+  *-apple-ios)
+    libc-test/target/$TARGET/debug/libc-test
+    ;;
+
+  *)
+    cargo run --manifest-path libc-test/Cargo.toml --target $TARGET
+    ;;
+esac
diff --git a/libc-test/Cargo.toml b/libc-test/Cargo.toml
new file mode 100644
index 0000000000..9ff476579f
--- /dev/null
+++ b/libc-test/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "libc-test"
+version = "0.1.0"
+authors = ["Alex Crichton <alex@alexcrichton.com>"]
+build = "build.rs"
+
+[dependencies]
+libc = { path = ".." }
+
+[build-dependencies]
+ctest = { git = "https://github.com/alexcrichton/ctest" }
diff --git a/libc-test/build.rs b/libc-test/build.rs
new file mode 100644
index 0000000000..b4eb70c685
--- /dev/null
+++ b/libc-test/build.rs
@@ -0,0 +1,249 @@
+#![deny(warnings)]
+
+extern crate ctest;
+
+use std::env;
+
+fn main() {
+    let target = env::var("TARGET").unwrap();
+    let windows = target.contains("windows");
+    let mingw = target.contains("windows-gnu");
+    let linux = target.contains("unknown-linux");
+    let android = target.contains("android");
+    let apple = target.contains("apple");
+    let musl = target.contains("musl");
+    let freebsd = target.contains("freebsd");
+    let bsdlike = freebsd || apple;
+    let mut cfg = ctest::TestGenerator::new();
+
+    // Pull in extra goodies on linux/mingw
+    if target.contains("unknown-linux") {
+        cfg.define("_GNU_SOURCE", None);
+    } else if windows {
+        cfg.define("_WIN32_WINNT", Some("0x8000"));
+    }
+
+    // Android doesn't actually have in_port_t but it's much easier if we
+    // provide one for us to test against
+    if android {
+        cfg.define("in_port_t", Some("uint16_t"));
+    }
+
+    cfg.header("errno.h")
+       .header("fcntl.h")
+       .header("limits.h")
+       .header("stddef.h")
+       .header("stdint.h")
+       .header("stdio.h")
+       .header("stdlib.h")
+       .header("sys/stat.h")
+       .header("sys/types.h")
+       .header("time.h")
+       .header("wchar.h");
+
+    if windows {
+        cfg.header("winsock2.h"); // must be before windows.h
+
+        cfg.header("direct.h");
+        cfg.header("io.h");
+        cfg.header("sys/utime.h");
+        cfg.header("windows.h");
+        cfg.header("process.h");
+        cfg.header("ws2ipdef.h");
+
+        if target.contains("gnu") {
+            cfg.header("ws2tcpip.h");
+        }
+    } else {
+        cfg.header("ctype.h");
+        cfg.header("dirent.h");
+        cfg.header("net/if.h");
+        cfg.header("netdb.h");
+        cfg.header("netinet/in.h");
+        cfg.header("netinet/ip.h");
+        cfg.header("netinet/tcp.h");
+        cfg.header("pthread.h");
+        cfg.header("dlfcn.h");
+        cfg.header("signal.h");
+        cfg.header("string.h");
+        cfg.header("sys/file.h");
+        cfg.header("sys/ioctl.h");
+        cfg.header("sys/mman.h");
+        cfg.header("sys/resource.h");
+        cfg.header("sys/socket.h");
+        cfg.header("sys/time.h");
+        cfg.header("sys/un.h");
+        cfg.header("sys/wait.h");
+        cfg.header("unistd.h");
+        cfg.header("utime.h");
+        cfg.header("pwd.h");
+        cfg.header("grp.h");
+    }
+
+    if android {
+        cfg.header("arpa/inet.h");
+    } else if !windows {
+        cfg.header("glob.h");
+        cfg.header("ifaddrs.h");
+
+        if !musl {
+            cfg.header("execinfo.h");
+            cfg.header("sys/sysctl.h");
+        }
+    }
+
+    if apple {
+        cfg.header("mach-o/dyld.h");
+        cfg.header("mach/mach_time.h");
+        cfg.header("malloc/malloc.h");
+        if target.starts_with("x86") {
+            cfg.header("crt_externs.h");
+        }
+    }
+
+    if linux || android {
+        cfg.header("netpacket/packet.h");
+        cfg.header("net/ethernet.h");
+        cfg.header("malloc.h");
+        cfg.header("sys/prctl.h");
+    }
+
+    if freebsd {
+        cfg.header("pthread_np.h");
+    }
+
+    cfg.type_name(move |ty, is_struct| {
+        match ty {
+            // Just pass all these through, no need for a "struct" prefix
+            "FILE" |
+            "DIR" => ty.to_string(),
+
+            // Fixup a few types on windows that don't actually exist.
+            "time64_t" if windows => "__time64_t".to_string(),
+            "ssize_t" if windows => "SSIZE_T".to_string(),
+
+            // OSX calls this something else
+            "sighandler_t" if bsdlike => "sig_t".to_string(),
+
+            t if t.ends_with("_t") => t.to_string(),
+
+            // Windows uppercase structs don't have `struct` in front, there's a
+            // few special cases for windows, and then otherwise put `struct` in
+            // front of everything.
+            t if is_struct => {
+                if windows && ty.chars().next().unwrap().is_uppercase() {
+                    t.to_string()
+                } else if windows && t == "stat" {
+                    "struct __stat64".to_string()
+                } else if windows && t == "utimbuf" {
+                    "struct __utimbuf64".to_string()
+                } else {
+                    format!("struct {}", t)
+                }
+            }
+
+            t => t.to_string(),
+        }
+    });
+
+    let target2 = target.clone();
+    cfg.field_name(move |struct_, field| {
+        match field {
+            // Our stat *_nsec fields normally don't actually exist but are part
+            // of a timeval struct
+            s if s.ends_with("_nsec") && struct_ == "stat" => {
+                if target2.contains("apple") {
+                    s.replace("_nsec", "spec.tv_nsec")
+                } else if target2.contains("android") {
+                    s.to_string()
+                } else {
+                    s.replace("e_nsec", ".tv_nsec")
+                }
+            }
+            s => s.to_string(),
+        }
+    });
+
+    cfg.skip_type(move |ty| {
+        match ty {
+            // sighandler_t is crazy across platforms
+            "sighandler_t" => true,
+
+            _ => false
+        }
+    });
+
+    cfg.skip_signededness(|c| {
+        match c {
+            "LARGE_INTEGER" |
+            "mach_timebase_info_data_t" |
+            "float" |
+            "double" => true,
+            n if n.starts_with("pthread") => true,
+
+            // windows-isms
+            n if n.starts_with("P") => true,
+            n if n.starts_with("H") => true,
+            n if n.starts_with("LP") => true,
+            _ => false,
+        }
+    });
+
+    cfg.skip_const(move |name| {
+        match name {
+            // Apparently these don't exist in mingw headers?
+            "MEM_RESET_UNDO" |
+            "FILE_ATTRIBUTE_NO_SCRUB_DATA" |
+            "FILE_ATTRIBUTE_INTEGRITY_STREAM" |
+            "ERROR_NOTHING_TO_TERMINATE" if mingw => true,
+
+            "SIG_IGN" => true, // sighandler_t weirdness
+
+            // types on musl are defined a little differently
+            n if musl && n.contains("PTHREAD") => true,
+
+            _ => false,
+        }
+    });
+
+    cfg.skip_fn(move |name| {
+        // skip those that are manually verifiedmanually verified
+        match name {
+            "execv" |       // crazy stuff with const/mut
+            "execve" |
+            "execvp" |
+            "execvpe" => true,
+
+            "getrlimit" |                    // non-int in 1st arg
+            "setrlimit" |                    // non-int in 1st arg
+            "strerror_r" if linux => true,   // actually xpg-something-or-other
+
+            // typed 2nd arg on linux and android
+            "gettimeofday" if linux || android || freebsd => true,
+
+            "dlerror" if android => true, // const-ness is added
+
+            _ => false,
+        }
+    });
+
+    // Windows dllimport oddness?
+    cfg.skip_fn_ptrcheck(move |_| windows);
+
+    cfg.skip_field_type(move |struct_, field| {
+        // This is a weird union, don't check the type.
+        (struct_ == "ifaddrs" && field == "ifa_ifu") ||
+        // sighandler_t type is super weird
+        (struct_ == "sigaction" && field == "sa_sigaction")
+    });
+
+    cfg.skip_field(move |struct_, field| {
+        // this is actually a union on linux, so we can't represent it well and
+        // just insert some padding.
+        (struct_ == "siginfo_t" && field == "_pad") ||
+        // musl names this __dummy1 but it's still there
+        (musl && struct_ == "glob_t" && field == "gl_flags")
+    });
+
+    cfg.generate("../src/lib.rs", "all.rs");
+}
diff --git a/libc-test/src/main.rs b/libc-test/src/main.rs
new file mode 100644
index 0000000000..fff188d321
--- /dev/null
+++ b/libc-test/src/main.rs
@@ -0,0 +1,6 @@
+#![allow(bad_style, improper_ctypes)]
+extern crate libc;
+
+use libc::*;
+
+include!(concat!(env!("OUT_DIR"), "/all.rs"));
diff --git a/rust b/rust
deleted file mode 160000
-Subproject e3f6a5606e4a0a99501eb9bfee20999f79a2975
diff --git a/src/dox.rs b/src/dox.rs
new file mode 100644
index 0000000000..9432b88219
--- /dev/null
+++ b/src/dox.rs
@@ -0,0 +1,109 @@
+pub use self::imp::*;
+
+#[cfg(not(dox))]
+mod imp {
+    pub use std::option::Option;
+    pub use std::clone::Clone;
+    pub use std::marker::Copy;
+}
+
+#[cfg(dox)]
+mod imp {
+    pub enum Option<T> {
+        Some(T),
+        None,
+    }
+    impl<T: Copy> Copy for Option<T> {}
+    impl<T: Clone> Clone for Option<T> {
+        fn clone(&self) -> Option<T> { loop {} }
+    }
+
+    pub trait Clone {
+        fn clone(&self) -> Self;
+    }
+
+    #[lang = "copy"]
+    pub trait Copy {}
+
+    #[lang = "sized"]
+    pub trait Sized {}
+
+    macro_rules! each_int {
+        ($mac:ident) => (
+            $mac!(u8);
+            $mac!(u16);
+            $mac!(u32);
+            $mac!(u64);
+            $mac!(usize);
+            $mac!(i8);
+            $mac!(i16);
+            $mac!(i32);
+            $mac!(i64);
+            $mac!(isize);
+        )
+    }
+
+    #[lang = "shl"]
+    pub trait Shl<RHS> {
+        type Output;
+        fn shl(self, rhs: RHS) -> Self::Output;
+    }
+
+    macro_rules! impl_shl {
+        ($($i:ident)*) => ($(
+            impl Shl<$i> for $i {
+                type Output = $i;
+                fn shl(self, rhs: $i) -> $i { self << rhs }
+            }
+        )*)
+    }
+    each_int!(impl_shl);
+
+    #[lang = "mul"]
+    pub trait Mul<RHS=Self> {
+        type Output;
+        fn mul(self, rhs: RHS) -> Self::Output;
+    }
+
+    macro_rules! impl_mul {
+        ($($i:ident)*) => ($(
+            impl Mul for $i {
+                type Output = $i;
+                fn mul(self, rhs: $i) -> $i { self * rhs }
+            }
+        )*)
+    }
+    each_int!(impl_mul);
+
+    #[lang = "sub"]
+    pub trait Sub<RHS=Self> {
+        type Output;
+        fn sub(self, rhs: RHS) -> Self::Output;
+    }
+
+    macro_rules! impl_sub {
+        ($($i:ident)*) => ($(
+            impl Sub for $i {
+                type Output = $i;
+                fn sub(self, rhs: $i) -> $i { self - rhs }
+            }
+        )*)
+    }
+    each_int!(impl_sub);
+
+    #[lang = "bitor"]
+    pub trait Bitor<RHS=Self> {
+        type Output;
+        fn bitor(self, rhs: RHS) -> Self::Output;
+    }
+
+    macro_rules! impl_bitor {
+        ($($i:ident)*) => ($(
+            impl Bitor for $i {
+                type Output = $i;
+                fn bitor(self, rhs: $i) -> $i { self | rhs }
+            }
+        )*)
+    }
+    each_int!(impl_bitor);
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000000..797c5394f9
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,233 @@
+// Copyright 2012-2015 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.
+
+//! Crate docs
+
+#![allow(bad_style, raw_pointer_derive, improper_ctypes)]
+#![cfg_attr(dox, feature(no_core, lang_items))]
+#![cfg_attr(dox, no_core)]
+#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
+       html_favicon_url = "https://doc.rust-lang.org/favicon.ico")]
+
+#![cfg_attr(all(target_os = "linux", target_arch = "x86_64"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/x86_64-unknown-linux-gnu"
+))]
+#![cfg_attr(all(target_os = "linux", target_arch = "x86"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/i686-unknown-linux-gnu"
+))]
+#![cfg_attr(all(target_os = "linux", target_arch = "arm"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/arm-unknown-linux-gnueabihf"
+))]
+#![cfg_attr(all(target_os = "linux", target_arch = "mips"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/mips-unknown-linux-gnu"
+))]
+#![cfg_attr(all(target_os = "linux", target_arch = "aarch64"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/aarch64-unknown-linux-gnu"
+))]
+#![cfg_attr(all(target_os = "linux", target_env = "musl"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/x86_64-unknown-linux-musl"
+))]
+#![cfg_attr(all(target_os = "macos", target_arch = "x86_64"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/x86_64-apple-darwin"
+))]
+#![cfg_attr(all(target_os = "macos", target_arch = "x86"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/i686-apple-darwin"
+))]
+#![cfg_attr(all(windows, target_arch = "x86_64", target_env = "gnu"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/x86_64-pc-windows-gnu"
+))]
+#![cfg_attr(all(windows, target_arch = "x86", target_env = "gnu"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/i686-pc-windows-gnu"
+))]
+#![cfg_attr(all(windows, target_arch = "x86_64", target_env = "msvc"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/x86_64-pc-windows-msvc"
+))]
+#![cfg_attr(all(windows, target_arch = "x86", target_env = "msvc"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/i686-pc-windows-msvc"
+))]
+#![cfg_attr(all(target_os = "android"), doc(
+    html_root_url = "https://doc.rust-lang.org/libc/arm-linux-androideabi"
+))]
+
+#[macro_use] mod macros;
+mod dox;
+
+// Use repr(u8) as LLVM expects `void*` to be the same as `i8*` to help enable
+// more optimization opportunities around it recognizing things like
+// malloc/free.
+#[repr(u8)]
+pub enum c_void {
+    // Two dummy variants so the #[repr] attribute can be used.
+    #[doc(hidden)]
+    __variant1,
+    #[doc(hidden)]
+    __variant2,
+}
+
+pub type int8_t = i8;
+pub type int16_t = i16;
+pub type int32_t = i32;
+pub type int64_t = i64;
+pub type uint8_t = u8;
+pub type uint16_t = u16;
+pub type uint32_t = u32;
+pub type uint64_t = u64;
+
+pub type c_schar = i8;
+pub type c_uchar = u8;
+pub type c_short = i16;
+pub type c_ushort = u16;
+pub type c_int = i32;
+pub type c_uint = u32;
+pub type c_float = f32;
+pub type c_double = f64;
+pub type c_longlong = i64;
+pub type c_ulonglong = u64;
+pub type intmax_t = i64;
+pub type uintmax_t = u64;
+
+pub type size_t = usize;
+pub type ptrdiff_t = isize;
+pub type intptr_t = isize;
+pub type uintptr_t = usize;
+pub type ssize_t = isize;
+
+pub enum FILE {}
+pub enum fpos_t {}
+pub enum DIR {}
+pub enum dirent {}
+
+extern {
+    pub fn isalnum(c: c_int) -> c_int;
+    pub fn isalpha(c: c_int) -> c_int;
+    pub fn iscntrl(c: c_int) -> c_int;
+    pub fn isdigit(c: c_int) -> c_int;
+    pub fn isgraph(c: c_int) -> c_int;
+    pub fn islower(c: c_int) -> c_int;
+    pub fn isprint(c: c_int) -> c_int;
+    pub fn ispunct(c: c_int) -> c_int;
+    pub fn isspace(c: c_int) -> c_int;
+    pub fn isupper(c: c_int) -> c_int;
+    pub fn isxdigit(c: c_int) -> c_int;
+    pub fn tolower(c: c_int) -> c_int;
+    pub fn toupper(c: c_int) -> c_int;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "fopen$UNIX2003")]
+    pub fn fopen(filename: *const c_char,
+                 mode: *const c_char) -> *mut FILE;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "freopen$UNIX2003")]
+    pub fn freopen(filename: *const c_char, mode: *const c_char,
+                   file: *mut FILE) -> *mut FILE;
+    pub fn fflush(file: *mut FILE) -> c_int;
+    pub fn fclose(file: *mut FILE) -> c_int;
+    pub fn remove(filename: *const c_char) -> c_int;
+    pub fn rename(oldname: *const c_char, newname: *const c_char) -> c_int;
+    pub fn tmpfile() -> *mut FILE;
+    pub fn setvbuf(stream: *mut FILE,
+                   buffer: *mut c_char,
+                   mode: c_int,
+                   size: size_t) -> c_int;
+    pub fn setbuf(stream: *mut FILE, buf: *mut c_char);
+    pub fn fgetc(stream: *mut FILE) -> c_int;
+    pub fn fgets(buf: *mut c_char, n: c_int, stream: *mut FILE) -> *mut c_char;
+    pub fn fputc(c: c_int, stream: *mut FILE) -> c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "fputs$UNIX2003")]
+    pub fn fputs(s: *const c_char, stream: *mut FILE)-> c_int;
+    pub fn puts(s: *const c_char) -> c_int;
+    pub fn ungetc(c: c_int, stream: *mut FILE) -> c_int;
+    pub fn fread(ptr: *mut c_void,
+                 size: size_t,
+                 nobj: size_t,
+                 stream: *mut FILE)
+                 -> size_t;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "fwrite$UNIX2003")]
+    pub fn fwrite(ptr: *const c_void,
+                  size: size_t,
+                  nobj: size_t,
+                  stream: *mut FILE)
+                  -> size_t;
+    pub fn fseek(stream: *mut FILE, offset: c_long, whence: c_int) -> c_int;
+    pub fn ftell(stream: *mut FILE) -> c_long;
+    pub fn rewind(stream: *mut FILE);
+    pub fn fgetpos(stream: *mut FILE, ptr: *mut fpos_t) -> c_int;
+    pub fn fsetpos(stream: *mut FILE, ptr: *const fpos_t) -> c_int;
+    pub fn feof(stream: *mut FILE) -> c_int;
+    pub fn ferror(stream: *mut FILE) -> c_int;
+    pub fn perror(s: *const c_char);
+    pub fn atoi(s: *const c_char) -> c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "strtod$UNIX2003")]
+    pub fn strtod(s: *const c_char, endp: *mut *mut c_char) -> c_double;
+    pub fn strtol(s: *const c_char,
+                  endp: *mut *mut c_char, base: c_int) -> c_long;
+    pub fn strtoul(s: *const c_char, endp: *mut *mut c_char,
+                   base: c_int) -> c_ulong;
+    pub fn calloc(nobj: size_t, size: size_t) -> *mut c_void;
+    pub fn malloc(size: size_t) -> *mut c_void;
+    pub fn realloc(p: *mut c_void, size: size_t) -> *mut c_void;
+    pub fn free(p: *mut c_void);
+    pub fn exit(status: c_int) -> !;
+    pub fn _exit(status: c_int) -> !;
+    pub fn atexit(cb: extern fn()) -> c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "system$UNIX2003")]
+    pub fn system(s: *const c_char) -> c_int;
+    pub fn getenv(s: *const c_char) -> *mut c_char;
+
+    pub fn strcpy(dst: *mut c_char, src: *const c_char) -> *mut c_char;
+    pub fn strncpy(dst: *mut c_char, src: *const c_char, n: size_t)
+                   -> *mut c_char;
+    pub fn strcat(s: *mut c_char, ct: *const c_char) -> *mut c_char;
+    pub fn strncat(s: *mut c_char, ct: *const c_char, n: size_t) -> *mut c_char;
+    pub fn strcmp(cs: *const c_char, ct: *const c_char) -> c_int;
+    pub fn strncmp(cs: *const c_char, ct: *const c_char, n: size_t) -> c_int;
+    pub fn strcoll(cs: *const c_char, ct: *const c_char) -> c_int;
+    pub fn strchr(cs: *const c_char, c: c_int) -> *mut c_char;
+    pub fn strrchr(cs: *const c_char, c: c_int) -> *mut c_char;
+    pub fn strspn(cs: *const c_char, ct: *const c_char) -> size_t;
+    pub fn strcspn(cs: *const c_char, ct: *const c_char) -> size_t;
+    pub fn strpbrk(cs: *const c_char, ct: *const c_char) -> *mut c_char;
+    pub fn strstr(cs: *const c_char, ct: *const c_char) -> *mut c_char;
+    pub fn strlen(cs: *const c_char) -> size_t;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "strerror$UNIX2003")]
+    pub fn strerror(n: c_int) -> *mut c_char;
+    pub fn strtok(s: *mut c_char, t: *const c_char) -> *mut c_char;
+    pub fn strxfrm(s: *mut c_char, ct: *const c_char, n: size_t) -> size_t;
+    pub fn wcslen(buf: *const wchar_t) -> size_t;
+
+    pub fn memcmp(cx: *const c_void, ct: *const c_void, n: size_t) -> c_int;
+    pub fn memchr(cx: *const c_void, c: c_int, n: size_t) -> *mut c_void;
+}
+
+// These are all inline functions on android, so they end up just being entirely
+// missing on that platform.
+#[cfg(not(target_os = "android"))]
+extern {
+    pub fn abs(i: c_int) -> c_int;
+    pub fn atof(s: *const c_char) -> c_double;
+    pub fn labs(i: c_long) -> c_long;
+    pub fn rand() -> c_int;
+    pub fn srand(seed: c_uint);
+}
+
+cfg_if! {
+    if #[cfg(windows)] {
+        mod windows;
+        pub use windows::*;
+    } else {
+        mod unix;
+        pub use unix::*;
+    }
+}
diff --git a/src/macros.rs b/src/macros.rs
new file mode 100644
index 0000000000..bb5d9eeadd
--- /dev/null
+++ b/src/macros.rs
@@ -0,0 +1,89 @@
+/// A macro for defining #[cfg] if-else statements.
+///
+/// This is similar to the `if/elif` C preprocessor macro by allowing definition
+/// of a cascade of `#[cfg]` cases, emitting the implementation which matches
+/// first.
+///
+/// This allows you to conveniently provide a long list #[cfg]'d blocks of code
+/// without having to rewrite each clause multiple times.
+macro_rules! cfg_if {
+    ($(
+        if #[cfg($($meta:meta),*)] { $($it:item)* }
+    ) else * else {
+        $($it2:item)*
+    }) => {
+        __cfg_if_items! {
+            () ;
+            $( ( ($($meta),*) ($($it)*) ), )*
+            ( () ($($it2)*) ),
+        }
+    }
+}
+
+macro_rules! __cfg_if_items {
+    (($($not:meta,)*) ; ) => {};
+    (($($not:meta,)*) ; ( ($($m:meta),*) ($($it:item)*) ), $($rest:tt)*) => {
+        __cfg_if_apply! { cfg(all($($m,)* not(any($($not),*)))), $($it)* }
+        __cfg_if_items! { ($($not,)* $($m,)*) ; $($rest)* }
+    }
+}
+
+macro_rules! __cfg_if_apply {
+    ($m:meta, $($it:item)*) => {
+        $(#[$m] $it)*
+    }
+}
+
+macro_rules! s {
+    ($(pub struct $i:ident { $($field:tt)* })*) => ($(
+        __item! {
+            #[repr(C)]
+            pub struct $i { $($field)* }
+        }
+        impl ::dox::Copy for $i {}
+        impl ::dox::Clone for $i {
+            fn clone(&self) -> $i { *self }
+        }
+    )*)
+}
+
+macro_rules! __item {
+    ($i:item) => ($i)
+}
+
+#[cfg(test)]
+mod tests {
+    cfg_if! {
+        if #[cfg(test)] {
+            use std::option::Option as Option2;
+            fn works1() -> Option2<u32> { Some(1) }
+        } else {
+            fn works1() -> Option<u32> { None }
+        }
+    }
+
+    cfg_if! {
+        if #[cfg(foo)] {
+            fn works2() -> bool { false }
+        } else if #[cfg(test)] {
+            fn works2() -> bool { true }
+        } else {
+            fn works2() -> bool { false }
+        }
+    }
+
+    cfg_if! {
+        if #[cfg(foo)] {
+            fn works3() -> bool { false }
+        } else {
+            fn works3() -> bool { true }
+        }
+    }
+
+    #[test]
+    fn it_works() {
+        assert!(works1().is_some());
+        assert!(works2());
+        assert!(works3());
+    }
+}
diff --git a/src/unix/bsd/apple/b32.rs b/src/unix/bsd/apple/b32.rs
new file mode 100644
index 0000000000..9a46ed0559
--- /dev/null
+++ b/src/unix/bsd/apple/b32.rs
@@ -0,0 +1,15 @@
+//! 32-bit specific Apple (ios/darwin) definitions
+
+pub type c_long = i32;
+pub type c_ulong = u32;
+
+pub const __PTHREAD_MUTEX_SIZE__: usize = 40;
+pub const __PTHREAD_COND_SIZE__: usize = 24;
+pub const __PTHREAD_RWLOCK_SIZE__: usize = 124;
+
+s! {
+    pub struct pthread_attr_t {
+        __sig: c_long,
+        __opaque: [::c_char; 36]
+    }
+}
diff --git a/src/unix/bsd/apple/b64.rs b/src/unix/bsd/apple/b64.rs
new file mode 100644
index 0000000000..344582e354
--- /dev/null
+++ b/src/unix/bsd/apple/b64.rs
@@ -0,0 +1,15 @@
+//! 64-bit specific Apple (ios/darwin) definitions
+
+pub type c_long = i64;
+pub type c_ulong = u64;
+
+pub const __PTHREAD_MUTEX_SIZE__: usize = 56;
+pub const __PTHREAD_COND_SIZE__: usize = 40;
+pub const __PTHREAD_RWLOCK_SIZE__: usize = 192;
+
+s! {
+    pub struct pthread_attr_t {
+        __sig: c_long,
+        __opaque: [::c_char; 56]
+    }
+}
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
new file mode 100644
index 0000000000..7aefcab271
--- /dev/null
+++ b/src/unix/bsd/apple/mod.rs
@@ -0,0 +1,666 @@
+//! Apple (ios/darwin)-specific definitions
+//!
+//! This covers *-apple-* triples currently
+
+pub type clock_t = c_ulong;
+pub type time_t = c_long;
+pub type suseconds_t = i32;
+pub type dev_t = i32;
+pub type ino_t = u64;
+pub type mode_t = u16;
+pub type nlink_t = u16;
+pub type blksize_t = i32;
+pub type rlim_t = u64;
+pub type mach_timebase_info_data_t = mach_timebase_info;
+pub type pthread_key_t = c_ulong;
+pub type sigset_t = u32;
+
+pub enum timezone {}
+
+s! {
+    pub struct glob_t {
+        pub gl_pathc:  ::size_t,
+        __unused1: ::c_int,
+        pub gl_offs:   ::size_t,
+        __unused2: ::c_int,
+        pub gl_pathv:  *mut *mut ::c_char,
+
+        __unused3: *mut ::c_void,
+
+        __unused4: *mut ::c_void,
+        __unused5: *mut ::c_void,
+        __unused6: *mut ::c_void,
+        __unused7: *mut ::c_void,
+        __unused8: *mut ::c_void,
+    }
+
+    pub struct sockaddr_storage {
+        pub ss_len: u8,
+        pub ss_family: ::sa_family_t,
+        __ss_pad1: [u8; 6],
+        __ss_align: i64,
+        __ss_pad2: [u8; 112],
+    }
+
+    pub struct addrinfo {
+        pub ai_flags: ::c_int,
+        pub ai_family: ::c_int,
+        pub ai_socktype: ::c_int,
+        pub ai_protocol: ::c_int,
+        pub ai_addrlen: ::socklen_t,
+        pub ai_canonname: *mut ::c_char,
+        pub ai_addr: *mut ::sockaddr,
+        pub ai_next: *mut addrinfo,
+    }
+
+    pub struct mach_timebase_info {
+        pub numer: u32,
+        pub denom: u32,
+    }
+
+    pub struct stat {
+        pub st_dev: dev_t,
+        pub st_mode: mode_t,
+        pub st_nlink: nlink_t,
+        pub st_ino: ino_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        pub st_rdev: dev_t,
+        pub st_atime: time_t,
+        pub st_atime_nsec: c_long,
+        pub st_mtime: time_t,
+        pub st_mtime_nsec: c_long,
+        pub st_ctime: time_t,
+        pub st_ctime_nsec: c_long,
+        pub st_birthtime: time_t,
+        pub st_birthtime_nsec: c_long,
+        pub st_size: ::off_t,
+        pub st_blocks: ::blkcnt_t,
+        pub st_blksize: blksize_t,
+        pub st_flags: ::uint32_t,
+        pub st_gen: ::uint32_t,
+        pub st_lspare: ::int32_t,
+        pub st_qspare: [::int64_t; 2],
+    }
+
+
+    pub struct pthread_mutex_t {
+        __sig: ::c_long,
+        __opaque: [u8; __PTHREAD_MUTEX_SIZE__],
+    }
+    pub struct pthread_mutexattr_t {
+        __sig: ::c_long,
+        __opaque: [u8; 8],
+    }
+
+    pub struct pthread_cond_t {
+        __sig: ::c_long,
+        __opaque: [u8; __PTHREAD_COND_SIZE__],
+    }
+
+    pub struct pthread_rwlock_t {
+        __sig: ::c_long,
+        __opaque: [u8; __PTHREAD_RWLOCK_SIZE__],
+    }
+
+    pub struct siginfo_t {
+        pub si_signo: ::c_int,
+        pub si_errno: ::c_int,
+        pub si_code: ::c_int,
+        pub si_pid: ::pid_t,
+        pub si_uid: ::uid_t,
+        pub si_status: ::c_int,
+        pub si_addr: *mut ::c_void,
+        _pad: [usize; 9],
+    }
+
+    pub struct sigaction {
+        pub sa_sigaction: ::sighandler_t,
+        pub sa_mask: sigset_t,
+        pub sa_flags: ::c_int,
+    }
+
+    pub struct stack_t {
+        pub ss_sp: *mut ::c_void,
+        pub ss_size: ::size_t,
+        pub ss_flags: ::c_int,
+    }
+}
+
+pub const EXIT_FAILURE: ::c_int = 1;
+pub const EXIT_SUCCESS: ::c_int = 0;
+pub const RAND_MAX: ::c_int = 2147483647;
+pub const EOF: ::c_int = -1;
+pub const SEEK_SET: ::c_int = 0;
+pub const SEEK_CUR: ::c_int = 1;
+pub const SEEK_END: ::c_int = 2;
+pub const _IOFBF: ::c_int = 0;
+pub const _IONBF: ::c_int = 2;
+pub const _IOLBF: ::c_int = 1;
+pub const BUFSIZ: ::c_uint = 1024;
+pub const FOPEN_MAX: ::c_uint = 20;
+pub const FILENAME_MAX: ::c_uint = 1024;
+pub const L_tmpnam: ::c_uint = 1024;
+pub const TMP_MAX: ::c_uint = 308915776;
+pub const _PC_NAME_MAX: ::c_int = 4;
+
+pub const O_RDONLY: ::c_int = 0;
+pub const O_WRONLY: ::c_int = 1;
+pub const O_RDWR: ::c_int = 2;
+pub const O_APPEND: ::c_int = 8;
+pub const O_CREAT: ::c_int = 512;
+pub const O_EXCL: ::c_int = 2048;
+pub const O_NOCTTY: ::c_int = 131072;
+pub const O_TRUNC: ::c_int = 1024;
+pub const S_IFIFO: mode_t = 4096;
+pub const S_IFCHR: mode_t = 8192;
+pub const S_IFBLK: mode_t = 24576;
+pub const S_IFDIR: mode_t = 16384;
+pub const S_IFREG: mode_t = 32768;
+pub const S_IFLNK: mode_t = 40960;
+pub const S_IFSOCK: mode_t = 49152;
+pub const S_IFMT: mode_t = 61440;
+pub const S_IEXEC: mode_t = 64;
+pub const S_IWRITE: mode_t = 128;
+pub const S_IREAD: mode_t = 256;
+pub const S_IRWXU: mode_t = 448;
+pub const S_IXUSR: mode_t = 64;
+pub const S_IWUSR: mode_t = 128;
+pub const S_IRUSR: mode_t = 256;
+pub const S_IRWXG: mode_t = 56;
+pub const S_IXGRP: mode_t = 8;
+pub const S_IWGRP: mode_t = 16;
+pub const S_IRGRP: mode_t = 32;
+pub const S_IRWXO: mode_t = 7;
+pub const S_IXOTH: mode_t = 1;
+pub const S_IWOTH: mode_t = 2;
+pub const S_IROTH: mode_t = 4;
+pub const F_OK: ::c_int = 0;
+pub const R_OK: ::c_int = 4;
+pub const W_OK: ::c_int = 2;
+pub const X_OK: ::c_int = 1;
+pub const STDIN_FILENO: ::c_int = 0;
+pub const STDOUT_FILENO: ::c_int = 1;
+pub const STDERR_FILENO: ::c_int = 2;
+pub const F_LOCK: ::c_int = 1;
+pub const F_TEST: ::c_int = 3;
+pub const F_TLOCK: ::c_int = 2;
+pub const F_ULOCK: ::c_int = 0;
+pub const SIGHUP: ::c_int = 1;
+pub const SIGINT: ::c_int = 2;
+pub const SIGQUIT: ::c_int = 3;
+pub const SIGILL: ::c_int = 4;
+pub const SIGABRT: ::c_int = 6;
+pub const SIGFPE: ::c_int = 8;
+pub const SIGKILL: ::c_int = 9;
+pub const SIGSEGV: ::c_int = 11;
+pub const SIGPIPE: ::c_int = 13;
+pub const SIGALRM: ::c_int = 14;
+pub const SIGTERM: ::c_int = 15;
+
+pub const PROT_NONE: ::c_int = 0;
+pub const PROT_READ: ::c_int = 1;
+pub const PROT_WRITE: ::c_int = 2;
+pub const PROT_EXEC: ::c_int = 4;
+
+pub const MAP_FILE: ::c_int = 0x0000;
+pub const MAP_SHARED: ::c_int = 0x0001;
+pub const MAP_PRIVATE: ::c_int = 0x0002;
+pub const MAP_FIXED: ::c_int = 0x0010;
+pub const MAP_ANON: ::c_int = 0x1000;
+
+pub const MAP_FAILED: *mut ::c_void = !0 as *mut ::c_void;
+
+pub const MCL_CURRENT: ::c_int = 0x0001;
+pub const MCL_FUTURE: ::c_int = 0x0002;
+
+pub const MS_ASYNC: ::c_int = 0x0001;
+pub const MS_INVALIDATE: ::c_int = 0x0002;
+pub const MS_SYNC: ::c_int = 0x0010;
+
+pub const MS_KILLPAGES: ::c_int = 0x0004;
+pub const MS_DEACTIVATE: ::c_int = 0x0008;
+
+pub const EPERM: ::c_int = 1;
+pub const ENOENT: ::c_int = 2;
+pub const ESRCH: ::c_int = 3;
+pub const EINTR: ::c_int = 4;
+pub const EIO: ::c_int = 5;
+pub const ENXIO: ::c_int = 6;
+pub const E2BIG: ::c_int = 7;
+pub const ENOEXEC: ::c_int = 8;
+pub const EBADF: ::c_int = 9;
+pub const ECHILD: ::c_int = 10;
+pub const EDEADLK: ::c_int = 11;
+pub const ENOMEM: ::c_int = 12;
+pub const EACCES: ::c_int = 13;
+pub const EFAULT: ::c_int = 14;
+pub const ENOTBLK: ::c_int = 15;
+pub const EBUSY: ::c_int = 16;
+pub const EEXIST: ::c_int = 17;
+pub const EXDEV: ::c_int = 18;
+pub const ENODEV: ::c_int = 19;
+pub const ENOTDIR: ::c_int = 20;
+pub const EISDIR: ::c_int = 21;
+pub const EINVAL: ::c_int = 22;
+pub const ENFILE: ::c_int = 23;
+pub const EMFILE: ::c_int = 24;
+pub const ENOTTY: ::c_int = 25;
+pub const ETXTBSY: ::c_int = 26;
+pub const EFBIG: ::c_int = 27;
+pub const ENOSPC: ::c_int = 28;
+pub const ESPIPE: ::c_int = 29;
+pub const EROFS: ::c_int = 30;
+pub const EMLINK: ::c_int = 31;
+pub const EPIPE: ::c_int = 32;
+pub const EDOM: ::c_int = 33;
+pub const ERANGE: ::c_int = 34;
+pub const EAGAIN: ::c_int = 35;
+pub const EWOULDBLOCK: ::c_int = EAGAIN;
+pub const EINPROGRESS: ::c_int = 36;
+pub const EALREADY: ::c_int = 37;
+pub const ENOTSOCK: ::c_int = 38;
+pub const EDESTADDRREQ: ::c_int = 39;
+pub const EMSGSIZE: ::c_int = 40;
+pub const EPROTOTYPE: ::c_int = 41;
+pub const ENOPROTOOPT: ::c_int = 42;
+pub const EPROTONOSUPPORT: ::c_int = 43;
+pub const ESOCKTNOSUPPORT: ::c_int = 44;
+pub const ENOTSUP: ::c_int = 45;
+pub const EPFNOSUPPORT: ::c_int = 46;
+pub const EAFNOSUPPORT: ::c_int = 47;
+pub const EADDRINUSE: ::c_int = 48;
+pub const EADDRNOTAVAIL: ::c_int = 49;
+pub const ENETDOWN: ::c_int = 50;
+pub const ENETUNREACH: ::c_int = 51;
+pub const ENETRESET: ::c_int = 52;
+pub const ECONNABORTED: ::c_int = 53;
+pub const ECONNRESET: ::c_int = 54;
+pub const ENOBUFS: ::c_int = 55;
+pub const EISCONN: ::c_int = 56;
+pub const ENOTCONN: ::c_int = 57;
+pub const ESHUTDOWN: ::c_int = 58;
+pub const ETOOMANYREFS: ::c_int = 59;
+pub const ETIMEDOUT: ::c_int = 60;
+pub const ECONNREFUSED: ::c_int = 61;
+pub const ELOOP: ::c_int = 62;
+pub const ENAMETOOLONG: ::c_int = 63;
+pub const EHOSTDOWN: ::c_int = 64;
+pub const EHOSTUNREACH: ::c_int = 65;
+pub const ENOTEMPTY: ::c_int = 66;
+pub const EPROCLIM: ::c_int = 67;
+pub const EUSERS: ::c_int = 68;
+pub const EDQUOT: ::c_int = 69;
+pub const ESTALE: ::c_int = 70;
+pub const EREMOTE: ::c_int = 71;
+pub const EBADRPC: ::c_int = 72;
+pub const ERPCMISMATCH: ::c_int = 73;
+pub const EPROGUNAVAIL: ::c_int = 74;
+pub const EPROGMISMATCH: ::c_int = 75;
+pub const EPROCUNAVAIL: ::c_int = 76;
+pub const ENOLCK: ::c_int = 77;
+pub const ENOSYS: ::c_int = 78;
+pub const EFTYPE: ::c_int = 79;
+pub const EAUTH: ::c_int = 80;
+pub const ENEEDAUTH: ::c_int = 81;
+pub const EPWROFF: ::c_int = 82;
+pub const EDEVERR: ::c_int = 83;
+pub const EOVERFLOW: ::c_int = 84;
+pub const EBADEXEC: ::c_int = 85;
+pub const EBADARCH: ::c_int = 86;
+pub const ESHLIBVERS: ::c_int = 87;
+pub const EBADMACHO: ::c_int = 88;
+pub const ECANCELED: ::c_int = 89;
+pub const EIDRM: ::c_int = 90;
+pub const ENOMSG: ::c_int = 91;
+pub const EILSEQ: ::c_int = 92;
+pub const ENOATTR: ::c_int = 93;
+pub const EBADMSG: ::c_int = 94;
+pub const EMULTIHOP: ::c_int = 95;
+pub const ENODATA: ::c_int = 96;
+pub const ENOLINK: ::c_int = 97;
+pub const ENOSR: ::c_int = 98;
+pub const ENOSTR: ::c_int = 99;
+pub const EPROTO: ::c_int = 100;
+pub const ETIME: ::c_int = 101;
+pub const EOPNOTSUPP: ::c_int = 102;
+pub const ENOPOLICY: ::c_int = 103;
+pub const ENOTRECOVERABLE: ::c_int = 104;
+pub const EOWNERDEAD: ::c_int = 105;
+pub const EQFULL: ::c_int = 106;
+pub const ELAST: ::c_int = 106;
+
+pub const F_DUPFD: ::c_int = 0;
+pub const F_GETFD: ::c_int = 1;
+pub const F_SETFD: ::c_int = 2;
+pub const F_GETFL: ::c_int = 3;
+pub const F_SETFL: ::c_int = 4;
+
+pub const O_ACCMODE: ::c_int = 3;
+
+pub const SIGTRAP: ::c_int = 5;
+
+pub const GLOB_APPEND  : ::c_int = 0x0001;
+pub const GLOB_DOOFFS  : ::c_int = 0x0002;
+pub const GLOB_ERR     : ::c_int = 0x0004;
+pub const GLOB_MARK    : ::c_int = 0x0008;
+pub const GLOB_NOCHECK : ::c_int = 0x0010;
+pub const GLOB_NOSORT  : ::c_int = 0x0020;
+pub const GLOB_NOESCAPE: ::c_int = 0x2000;
+
+pub const GLOB_NOSPACE : ::c_int = -1;
+pub const GLOB_ABORTED : ::c_int = -2;
+pub const GLOB_NOMATCH : ::c_int = -3;
+
+pub const POSIX_MADV_NORMAL: ::c_int = 0;
+pub const POSIX_MADV_RANDOM: ::c_int = 1;
+pub const POSIX_MADV_SEQUENTIAL: ::c_int = 2;
+pub const POSIX_MADV_WILLNEED: ::c_int = 3;
+pub const POSIX_MADV_DONTNEED: ::c_int = 4;
+
+pub const _SC_IOV_MAX: ::c_int = 56;
+pub const _SC_GETGR_R_SIZE_MAX: ::c_int = 70;
+pub const _SC_GETPW_R_SIZE_MAX: ::c_int = 71;
+pub const _SC_LOGIN_NAME_MAX: ::c_int = 73;
+pub const _SC_MQ_PRIO_MAX: ::c_int = 75;
+pub const _SC_THREAD_ATTR_STACKADDR: ::c_int = 82;
+pub const _SC_THREAD_ATTR_STACKSIZE: ::c_int = 83;
+pub const _SC_THREAD_DESTRUCTOR_ITERATIONS: ::c_int = 85;
+pub const _SC_THREAD_KEYS_MAX: ::c_int = 86;
+pub const _SC_THREAD_PRIO_INHERIT: ::c_int = 87;
+pub const _SC_THREAD_PRIO_PROTECT: ::c_int = 88;
+pub const _SC_THREAD_PRIORITY_SCHEDULING: ::c_int = 89;
+pub const _SC_THREAD_PROCESS_SHARED: ::c_int = 90;
+pub const _SC_THREAD_SAFE_FUNCTIONS: ::c_int = 91;
+pub const _SC_THREAD_STACK_MIN: ::c_int = 93;
+pub const _SC_THREAD_THREADS_MAX: ::c_int = 94;
+pub const _SC_THREADS: ::c_int = 96;
+pub const _SC_TTY_NAME_MAX: ::c_int = 101;
+pub const _SC_ATEXIT_MAX: ::c_int = 107;
+pub const _SC_XOPEN_CRYPT: ::c_int = 108;
+pub const _SC_XOPEN_ENH_I18N: ::c_int = 109;
+pub const _SC_XOPEN_LEGACY: ::c_int = 110;
+pub const _SC_XOPEN_REALTIME: ::c_int = 111;
+pub const _SC_XOPEN_REALTIME_THREADS: ::c_int = 112;
+pub const _SC_XOPEN_SHM: ::c_int = 113;
+pub const _SC_XOPEN_UNIX: ::c_int = 115;
+pub const _SC_XOPEN_VERSION: ::c_int = 116;
+pub const _SC_XOPEN_XCU_VERSION: ::c_int = 121;
+
+pub const PTHREAD_CREATE_JOINABLE: ::c_int = 1;
+pub const PTHREAD_CREATE_DETACHED: ::c_int = 2;
+pub const PTHREAD_STACK_MIN: ::size_t = 8192;
+
+pub const RLIMIT_CPU: ::c_int = 0;
+pub const RLIMIT_FSIZE: ::c_int = 1;
+pub const RLIMIT_DATA: ::c_int = 2;
+pub const RLIMIT_STACK: ::c_int = 3;
+pub const RLIMIT_CORE: ::c_int = 4;
+pub const RLIMIT_AS: ::c_int = 5;
+pub const RLIMIT_MEMLOCK: ::c_int = 6;
+pub const RLIMIT_NPROC: ::c_int = 7;
+pub const RLIMIT_NOFILE: ::c_int = 8;
+pub const RLIM_NLIMITS: ::c_int = 9;
+pub const _RLIMIT_POSIX_FLAG: ::c_int = 0x1000;
+
+pub const RLIM_INFINITY: rlim_t = 0x7fff_ffff_ffff_ffff;
+
+pub const RUSAGE_SELF: ::c_int = 0;
+pub const RUSAGE_CHILDREN: ::c_int = -1;
+
+pub const MADV_NORMAL: ::c_int = 0;
+pub const MADV_RANDOM: ::c_int = 1;
+pub const MADV_SEQUENTIAL: ::c_int = 2;
+pub const MADV_WILLNEED: ::c_int = 3;
+pub const MADV_DONTNEED: ::c_int = 4;
+pub const MADV_FREE: ::c_int = 5;
+pub const MADV_ZERO_WIRED_PAGES: ::c_int = 6;
+pub const MADV_FREE_REUSABLE: ::c_int = 7;
+pub const MADV_FREE_REUSE: ::c_int = 8;
+pub const MADV_CAN_REUSE: ::c_int = 9;
+
+pub const MINCORE_INCORE: ::c_int =  0x1;
+pub const MINCORE_REFERENCED: ::c_int = 0x2;
+pub const MINCORE_MODIFIED: ::c_int = 0x4;
+pub const MINCORE_REFERENCED_OTHER: ::c_int = 0x8;
+pub const MINCORE_MODIFIED_OTHER: ::c_int = 0x10;
+
+pub const AF_UNIX: ::c_int = 1;
+pub const AF_INET: ::c_int = 2;
+pub const AF_INET6: ::c_int = 30;
+pub const SOCK_STREAM: ::c_int = 1;
+pub const SOCK_DGRAM: ::c_int = 2;
+pub const SOCK_RAW: ::c_int = 3;
+pub const IPPROTO_TCP: ::c_int = 6;
+pub const IPPROTO_IP: ::c_int = 0;
+pub const IPPROTO_IPV6: ::c_int = 41;
+pub const IP_MULTICAST_TTL: ::c_int = 10;
+pub const IP_MULTICAST_LOOP: ::c_int = 11;
+pub const IP_TTL: ::c_int = 4;
+pub const IP_HDRINCL: ::c_int = 2;
+pub const IP_ADD_MEMBERSHIP: ::c_int = 12;
+pub const IP_DROP_MEMBERSHIP: ::c_int = 13;
+pub const IPV6_JOIN_GROUP: ::c_int = 12;
+pub const IPV6_LEAVE_GROUP: ::c_int = 13;
+
+pub const TCP_NODELAY: ::c_int = 0x01;
+pub const TCP_KEEPALIVE: ::c_int = 0x10;
+pub const SOL_SOCKET: ::c_int = 0xffff;
+
+pub const SO_DEBUG: ::c_int = 0x01;
+pub const SO_ACCEPTCONN: ::c_int = 0x0002;
+pub const SO_REUSEADDR: ::c_int = 0x0004;
+pub const SO_KEEPALIVE: ::c_int = 0x0008;
+pub const SO_DONTROUTE: ::c_int = 0x0010;
+pub const SO_BROADCAST: ::c_int = 0x0020;
+pub const SO_USELOOPBACK: ::c_int = 0x0040;
+pub const SO_LINGER: ::c_int = 0x0080;
+pub const SO_OOBINLINE: ::c_int = 0x0100;
+pub const SO_REUSEPORT: ::c_int = 0x0200;
+pub const SO_SNDBUF: ::c_int = 0x1001;
+pub const SO_RCVBUF: ::c_int = 0x1002;
+pub const SO_SNDLOWAT: ::c_int = 0x1003;
+pub const SO_RCVLOWAT: ::c_int = 0x1004;
+pub const SO_SNDTIMEO: ::c_int = 0x1005;
+pub const SO_RCVTIMEO: ::c_int = 0x1006;
+pub const SO_ERROR: ::c_int = 0x1007;
+pub const SO_TYPE: ::c_int = 0x1008;
+
+pub const IFF_LOOPBACK: ::c_int = 0x8;
+
+pub const SHUT_RD: ::c_int = 0;
+pub const SHUT_WR: ::c_int = 1;
+pub const SHUT_RDWR: ::c_int = 2;
+
+pub const LOCK_SH: ::c_int = 1;
+pub const LOCK_EX: ::c_int = 2;
+pub const LOCK_NB: ::c_int = 4;
+pub const LOCK_UN: ::c_int = 8;
+
+pub const O_DSYNC: ::c_int = 4194304;
+pub const O_SYNC: ::c_int = 128;
+pub const O_NONBLOCK: ::c_int = 4;
+pub const F_GETPATH: ::c_int = 50;
+pub const F_FULLFSYNC: ::c_int = 51;
+
+pub const MAP_COPY: ::c_int = 0x0002;
+pub const MAP_RENAME: ::c_int = 0x0020;
+pub const MAP_NORESERVE: ::c_int = 0x0040;
+pub const MAP_NOEXTEND: ::c_int = 0x0100;
+pub const MAP_HASSEMAPHORE: ::c_int = 0x0200;
+pub const MAP_NOCACHE: ::c_int = 0x0400;
+pub const MAP_JIT: ::c_int = 0x0800;
+
+pub const IPPROTO_RAW: ::c_int = 255;
+
+pub const SO_NREAD: ::c_int = 0x1020;
+pub const SO_NKE: ::c_int = 0x1021;
+pub const SO_NOSIGPIPE: ::c_int = 0x1022;
+pub const SO_NOADDRERR: ::c_int = 0x1023;
+pub const SO_NWRITE: ::c_int = 0x1024;
+pub const SO_DONTTRUNC: ::c_int = 0x2000;
+pub const SO_WANTMORE: ::c_int = 0x4000;
+pub const SO_WANTOOBFLAG: ::c_int = 0x8000;
+
+pub const PATH_MAX: ::c_int = 1024;
+
+pub const _SC_ARG_MAX: ::c_int = 1;
+pub const _SC_CHILD_MAX: ::c_int = 2;
+pub const _SC_CLK_TCK: ::c_int = 3;
+pub const _SC_NGROUPS_MAX: ::c_int = 4;
+pub const _SC_OPEN_MAX: ::c_int = 5;
+pub const _SC_JOB_CONTROL: ::c_int = 6;
+pub const _SC_SAVED_IDS: ::c_int = 7;
+pub const _SC_VERSION: ::c_int = 8;
+pub const _SC_BC_BASE_MAX: ::c_int = 9;
+pub const _SC_BC_DIM_MAX: ::c_int = 10;
+pub const _SC_BC_SCALE_MAX: ::c_int = 11;
+pub const _SC_BC_STRING_MAX: ::c_int = 12;
+pub const _SC_COLL_WEIGHTS_MAX: ::c_int = 13;
+pub const _SC_EXPR_NEST_MAX: ::c_int = 14;
+pub const _SC_LINE_MAX: ::c_int = 15;
+pub const _SC_RE_DUP_MAX: ::c_int = 16;
+pub const _SC_2_VERSION: ::c_int = 17;
+pub const _SC_2_C_BIND: ::c_int = 18;
+pub const _SC_2_C_DEV: ::c_int = 19;
+pub const _SC_2_CHAR_TERM: ::c_int = 20;
+pub const _SC_2_FORT_DEV: ::c_int = 21;
+pub const _SC_2_FORT_RUN: ::c_int = 22;
+pub const _SC_2_LOCALEDEF: ::c_int = 23;
+pub const _SC_2_SW_DEV: ::c_int = 24;
+pub const _SC_2_UPE: ::c_int = 25;
+pub const _SC_STREAM_MAX: ::c_int = 26;
+pub const _SC_TZNAME_MAX: ::c_int = 27;
+pub const _SC_ASYNCHRONOUS_IO: ::c_int = 28;
+pub const _SC_PAGESIZE: ::c_int = 29;
+pub const _SC_MEMLOCK: ::c_int = 30;
+pub const _SC_MEMLOCK_RANGE: ::c_int = 31;
+pub const _SC_MEMORY_PROTECTION: ::c_int = 32;
+pub const _SC_MESSAGE_PASSING: ::c_int = 33;
+pub const _SC_PRIORITIZED_IO: ::c_int = 34;
+pub const _SC_PRIORITY_SCHEDULING: ::c_int = 35;
+pub const _SC_REALTIME_SIGNALS: ::c_int = 36;
+pub const _SC_SEMAPHORES: ::c_int = 37;
+pub const _SC_FSYNC: ::c_int = 38;
+pub const _SC_SHARED_MEMORY_OBJECTS: ::c_int = 39;
+pub const _SC_SYNCHRONIZED_IO: ::c_int = 40;
+pub const _SC_TIMERS: ::c_int = 41;
+pub const _SC_AIO_LISTIO_MAX: ::c_int = 42;
+pub const _SC_AIO_MAX: ::c_int = 43;
+pub const _SC_AIO_PRIO_DELTA_MAX: ::c_int = 44;
+pub const _SC_DELAYTIMER_MAX: ::c_int = 45;
+pub const _SC_MQ_OPEN_MAX: ::c_int = 46;
+pub const _SC_MAPPED_FILES: ::c_int = 47;
+pub const _SC_RTSIG_MAX: ::c_int = 48;
+pub const _SC_SEM_NSEMS_MAX: ::c_int = 49;
+pub const _SC_SEM_VALUE_MAX: ::c_int = 50;
+pub const _SC_SIGQUEUE_MAX: ::c_int = 51;
+pub const _SC_TIMER_MAX: ::c_int = 52;
+pub const _SC_NPROCESSORS_CONF: ::c_int = 57;
+pub const _SC_NPROCESSORS_ONLN: ::c_int = 58;
+pub const _SC_2_PBS: ::c_int = 59;
+pub const _SC_2_PBS_ACCOUNTING: ::c_int = 60;
+pub const _SC_2_PBS_CHECKPOINT: ::c_int = 61;
+pub const _SC_2_PBS_LOCATE: ::c_int = 62;
+pub const _SC_2_PBS_MESSAGE: ::c_int = 63;
+pub const _SC_2_PBS_TRACK: ::c_int = 64;
+pub const _SC_ADVISORY_INFO: ::c_int = 65;
+pub const _SC_BARRIERS: ::c_int = 66;
+pub const _SC_CLOCK_SELECTION: ::c_int = 67;
+pub const _SC_CPUTIME: ::c_int = 68;
+pub const _SC_FILE_LOCKING: ::c_int = 69;
+pub const _SC_HOST_NAME_MAX: ::c_int = 72;
+pub const _SC_MONOTONIC_CLOCK: ::c_int = 74;
+pub const _SC_READER_WRITER_LOCKS: ::c_int = 76;
+pub const _SC_REGEXP: ::c_int = 77;
+pub const _SC_SHELL: ::c_int = 78;
+pub const _SC_SPAWN: ::c_int = 79;
+pub const _SC_SPIN_LOCKS: ::c_int = 80;
+pub const _SC_SPORADIC_SERVER: ::c_int = 81;
+pub const _SC_THREAD_CPUTIME: ::c_int = 84;
+pub const _SC_THREAD_SPORADIC_SERVER: ::c_int = 92;
+pub const _SC_TIMEOUTS: ::c_int = 95;
+pub const _SC_TRACE: ::c_int = 97;
+pub const _SC_TRACE_EVENT_FILTER: ::c_int = 98;
+pub const _SC_TRACE_INHERIT: ::c_int = 99;
+pub const _SC_TRACE_LOG: ::c_int = 100;
+pub const _SC_TYPED_MEMORY_OBJECTS: ::c_int = 102;
+pub const _SC_V6_ILP32_OFF32: ::c_int = 103;
+pub const _SC_V6_ILP32_OFFBIG: ::c_int = 104;
+pub const _SC_V6_LP64_OFF64: ::c_int = 105;
+pub const _SC_V6_LPBIG_OFFBIG: ::c_int = 106;
+pub const _SC_IPV6: ::c_int = 118;
+pub const _SC_RAW_SOCKETS: ::c_int = 119;
+pub const _SC_SYMLOOP_MAX: ::c_int = 120;
+pub const _SC_PAGE_SIZE: ::c_int = _SC_PAGESIZE;
+pub const _SC_XOPEN_STREAMS: ::c_int = 114;
+pub const _SC_XBS5_ILP32_OFF32: ::c_int = 122;
+pub const _SC_XBS5_ILP32_OFFBIG: ::c_int = 123;
+pub const _SC_XBS5_LP64_OFF64: ::c_int = 124;
+pub const _SC_XBS5_LPBIG_OFFBIG: ::c_int = 125;
+pub const _SC_SS_REPL_MAX: ::c_int = 126;
+pub const _SC_TRACE_EVENT_NAME_MAX: ::c_int = 127;
+pub const _SC_TRACE_NAME_MAX: ::c_int = 128;
+pub const _SC_TRACE_SYS_MAX: ::c_int = 129;
+pub const _SC_TRACE_USER_EVENT_MAX: ::c_int = 130;
+pub const _SC_PASS_MAX: ::c_int = 131;
+
+pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 2;
+pub const _PTHREAD_MUTEX_SIG_init: ::c_long = 0x32AAABA7;
+pub const _PTHREAD_COND_SIG_init: ::c_long = 0x3CB0B1BB;
+pub const _PTHREAD_RWLOCK_SIG_init: ::c_long = 0x2DA8B3B4;
+pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = pthread_mutex_t {
+    __sig: _PTHREAD_MUTEX_SIG_init,
+    __opaque: [0; __PTHREAD_MUTEX_SIZE__],
+};
+pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = pthread_cond_t {
+    __sig: _PTHREAD_COND_SIG_init,
+    __opaque: [0; __PTHREAD_COND_SIZE__],
+};
+pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = pthread_rwlock_t {
+    __sig: _PTHREAD_RWLOCK_SIG_init,
+    __opaque: [0; __PTHREAD_RWLOCK_SIZE__],
+};
+
+pub const SIGSTKSZ: ::size_t = 131072;
+
+extern {
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "mprotect$UNIX2003")]
+    pub fn mprotect(addr: *mut ::c_void, len: ::size_t, prot: ::c_int)
+                    -> ::c_int;
+    pub fn shm_open(name: *const ::c_char, oflag: ::c_int, ...) -> ::c_int;
+    pub fn sysctl(name: *mut ::c_int,
+                  namelen: ::c_uint,
+                  oldp: *mut ::c_void,
+                  oldlenp: *mut ::size_t,
+                  newp: *mut ::c_void,
+                  newlen: ::size_t)
+                  -> ::c_int;
+    pub fn sysctlbyname(name: *const ::c_char,
+                        oldp: *mut ::c_void,
+                        oldlenp: *mut ::size_t,
+                        newp: *mut ::c_void,
+                        newlen: ::size_t)
+                        -> ::c_int;
+    pub fn mach_absolute_time() -> u64;
+    pub fn mach_timebase_info(info: *mut ::mach_timebase_info) -> ::c_int;
+    pub fn pthread_setname_np(name: *const ::c_char) -> ::c_int;
+    pub fn pthread_get_stackaddr_np(thread: ::pthread_t) -> *mut ::c_void;
+    pub fn pthread_get_stacksize_np(thread: ::pthread_t) -> ::size_t;
+    pub fn __error() -> *mut ::c_int;
+    pub fn backtrace(buf: *mut *mut ::c_void,
+                     sz: ::c_int) -> ::c_int;
+}
+
+cfg_if! {
+    if #[cfg(any(target_arch = "arm", target_arch = "x86"))] {
+        mod b32;
+        pub use self::b32::*;
+    } else if #[cfg(any(target_arch = "x86_64", target_arch = "aarch64"))] {
+        mod b64;
+        pub use self::b64::*;
+    } else {
+        // unknown arch...
+    }
+}
diff --git a/src/unix/bsd/freebsdlike/dragonfly.rs b/src/unix/bsd/freebsdlike/dragonfly.rs
new file mode 100644
index 0000000000..f158cda803
--- /dev/null
+++ b/src/unix/bsd/freebsdlike/dragonfly.rs
@@ -0,0 +1,6 @@
+pub const PTHREAD_STACK_MIN: ::size_t = 1024;
+pub const KERN_PROC_PATHNAME: ::c_int = 9;
+
+extern {
+    pub fn __dfly_error() -> *const ::c_int;
+}
diff --git a/src/unix/bsd/freebsdlike/freebsd.rs b/src/unix/bsd/freebsdlike/freebsd.rs
new file mode 100644
index 0000000000..cfaba455a8
--- /dev/null
+++ b/src/unix/bsd/freebsdlike/freebsd.rs
@@ -0,0 +1,6 @@
+pub const PTHREAD_STACK_MIN: ::size_t = 2048;
+pub const KERN_PROC_PATHNAME: ::c_int = 12;
+
+extern {
+    pub fn __error() -> *mut ::c_int;
+}
diff --git a/src/unix/bsd/freebsdlike/mod.rs b/src/unix/bsd/freebsdlike/mod.rs
new file mode 100644
index 0000000000..043eb64afa
--- /dev/null
+++ b/src/unix/bsd/freebsdlike/mod.rs
@@ -0,0 +1,537 @@
+pub type clock_t = i32;
+pub type dev_t = u32;
+pub type ino_t = u32;
+pub type mode_t = u16;
+pub type nlink_t = u16;
+pub type blksize_t = u32;
+pub type fflags_t = u32;
+pub type pthread_attr_t = *mut ::c_void;
+pub type rlim_t = i64;
+pub type pthread_mutex_t = *mut ::c_void;
+pub type pthread_mutexattr_t = *mut ::c_void;
+pub type pthread_cond_t = *mut ::c_void;
+pub type pthread_rwlock_t = *mut ::c_void;
+pub type pthread_key_t = ::c_int;
+
+pub enum timezone {}
+
+s! {
+    pub struct glob_t {
+        pub gl_pathc: ::size_t,
+        __unused1: ::size_t,
+        pub gl_offs: ::size_t,
+        __unused2: ::c_int,
+        pub gl_pathv:  *mut *mut ::c_char,
+
+        __unused3: *mut ::c_void,
+
+        __unused4: *mut ::c_void,
+        __unused5: *mut ::c_void,
+        __unused6: *mut ::c_void,
+        __unused7: *mut ::c_void,
+        __unused8: *mut ::c_void,
+    }
+
+    pub struct sockaddr_storage {
+        pub ss_len: u8,
+        pub ss_family: ::sa_family_t,
+        __ss_pad1: [u8; 6],
+        __ss_align: i64,
+        __ss_pad2: [u8; 112],
+    }
+
+    pub struct addrinfo {
+        pub ai_flags: ::c_int,
+        pub ai_family: ::c_int,
+        pub ai_socktype: ::c_int,
+        pub ai_protocol: ::c_int,
+        pub ai_addrlen: ::socklen_t,
+        pub ai_canonname: *mut ::c_char,
+        pub ai_addr: *mut ::sockaddr,
+        pub ai_next: *mut addrinfo,
+    }
+
+    pub struct sigset_t {
+        bits: [u32; 4],
+    }
+
+    pub struct siginfo_t {
+        pub si_signo: ::c_int,
+        pub si_errno: ::c_int,
+        pub si_code: ::c_int,
+        pub si_pid: ::pid_t,
+        pub si_uid: ::uid_t,
+        pub si_status: ::c_int,
+        pub si_addr: *mut ::c_void,
+        _pad: [::c_int; 12],
+    }
+
+    pub struct sigaction {
+        pub sa_sigaction: ::sighandler_t,
+        pub sa_flags: ::c_int,
+        pub sa_mask: sigset_t,
+    }
+
+    pub struct stack_t {
+        pub ss_sp: *mut ::c_char,
+        pub ss_size: ::size_t,
+        pub ss_flags: ::c_int,
+    }
+}
+
+pub const EXIT_FAILURE: ::c_int = 1;
+pub const EXIT_SUCCESS: ::c_int = 0;
+pub const RAND_MAX: ::c_int = 0x7fff_fffd;
+pub const EOF: ::c_int = -1;
+pub const SEEK_SET: ::c_int = 0;
+pub const SEEK_CUR: ::c_int = 1;
+pub const SEEK_END: ::c_int = 2;
+pub const _IOFBF: ::c_int = 0;
+pub const _IONBF: ::c_int = 2;
+pub const _IOLBF: ::c_int = 1;
+pub const BUFSIZ: ::c_uint = 1024;
+pub const FOPEN_MAX: ::c_uint = 20;
+pub const FILENAME_MAX: ::c_uint = 1024;
+pub const L_tmpnam: ::c_uint = 1024;
+pub const TMP_MAX: ::c_uint = 308915776;
+
+pub const O_RDONLY: ::c_int = 0;
+pub const O_WRONLY: ::c_int = 1;
+pub const O_RDWR: ::c_int = 2;
+pub const O_APPEND: ::c_int = 8;
+pub const O_CREAT: ::c_int = 512;
+pub const O_EXCL: ::c_int = 2048;
+pub const O_NOCTTY: ::c_int = 32768;
+pub const O_TRUNC: ::c_int = 1024;
+pub const S_IFIFO: mode_t = 4096;
+pub const S_IFCHR: mode_t = 8192;
+pub const S_IFBLK: mode_t = 24576;
+pub const S_IFDIR: mode_t = 16384;
+pub const S_IFREG: mode_t = 32768;
+pub const S_IFLNK: mode_t = 40960;
+pub const S_IFSOCK: mode_t = 49152;
+pub const S_IFMT: mode_t = 61440;
+pub const S_IEXEC: mode_t = 64;
+pub const S_IWRITE: mode_t = 128;
+pub const S_IREAD: mode_t = 256;
+pub const S_IRWXU: mode_t = 448;
+pub const S_IXUSR: mode_t = 64;
+pub const S_IWUSR: mode_t = 128;
+pub const S_IRUSR: mode_t = 256;
+pub const S_IRWXG: mode_t = 56;
+pub const S_IXGRP: mode_t = 8;
+pub const S_IWGRP: mode_t = 16;
+pub const S_IRGRP: mode_t = 32;
+pub const S_IRWXO: mode_t = 7;
+pub const S_IXOTH: mode_t = 1;
+pub const S_IWOTH: mode_t = 2;
+pub const S_IROTH: mode_t = 4;
+pub const F_OK: ::c_int = 0;
+pub const R_OK: ::c_int = 4;
+pub const W_OK: ::c_int = 2;
+pub const X_OK: ::c_int = 1;
+pub const STDIN_FILENO: ::c_int = 0;
+pub const STDOUT_FILENO: ::c_int = 1;
+pub const STDERR_FILENO: ::c_int = 2;
+pub const F_LOCK: ::c_int = 1;
+pub const F_TEST: ::c_int = 3;
+pub const F_TLOCK: ::c_int = 2;
+pub const F_ULOCK: ::c_int = 0;
+pub const SIGHUP: ::c_int = 1;
+pub const SIGINT: ::c_int = 2;
+pub const SIGQUIT: ::c_int = 3;
+pub const SIGILL: ::c_int = 4;
+pub const SIGABRT: ::c_int = 6;
+pub const SIGFPE: ::c_int = 8;
+pub const SIGKILL: ::c_int = 9;
+pub const SIGSEGV: ::c_int = 11;
+pub const SIGPIPE: ::c_int = 13;
+pub const SIGALRM: ::c_int = 14;
+pub const SIGTERM: ::c_int = 15;
+
+pub const PROT_NONE: ::c_int = 0;
+pub const PROT_READ: ::c_int = 1;
+pub const PROT_WRITE: ::c_int = 2;
+pub const PROT_EXEC: ::c_int = 4;
+
+pub const MAP_FILE: ::c_int = 0x0000;
+pub const MAP_SHARED: ::c_int = 0x0001;
+pub const MAP_PRIVATE: ::c_int = 0x0002;
+pub const MAP_FIXED: ::c_int = 0x0010;
+pub const MAP_ANON: ::c_int = 0x1000;
+
+pub const MAP_FAILED: *mut ::c_void = !0 as *mut ::c_void;
+
+pub const MCL_CURRENT: ::c_int = 0x0001;
+pub const MCL_FUTURE: ::c_int = 0x0002;
+
+pub const MS_SYNC: ::c_int = 0x0000;
+pub const MS_ASYNC: ::c_int = 0x0001;
+pub const MS_INVALIDATE: ::c_int = 0x0002;
+
+pub const EPERM: ::c_int = 1;
+pub const ENOENT: ::c_int = 2;
+pub const ESRCH: ::c_int = 3;
+pub const EINTR: ::c_int = 4;
+pub const EIO: ::c_int = 5;
+pub const ENXIO: ::c_int = 6;
+pub const E2BIG: ::c_int = 7;
+pub const ENOEXEC: ::c_int = 8;
+pub const EBADF: ::c_int = 9;
+pub const ECHILD: ::c_int = 10;
+pub const EDEADLK: ::c_int = 11;
+pub const ENOMEM: ::c_int = 12;
+pub const EACCES: ::c_int = 13;
+pub const EFAULT: ::c_int = 14;
+pub const ENOTBLK: ::c_int = 15;
+pub const EBUSY: ::c_int = 16;
+pub const EEXIST: ::c_int = 17;
+pub const EXDEV: ::c_int = 18;
+pub const ENODEV: ::c_int = 19;
+pub const ENOTDIR: ::c_int = 20;
+pub const EISDIR: ::c_int = 21;
+pub const EINVAL: ::c_int = 22;
+pub const ENFILE: ::c_int = 23;
+pub const EMFILE: ::c_int = 24;
+pub const ENOTTY: ::c_int = 25;
+pub const ETXTBSY: ::c_int = 26;
+pub const EFBIG: ::c_int = 27;
+pub const ENOSPC: ::c_int = 28;
+pub const ESPIPE: ::c_int = 29;
+pub const EROFS: ::c_int = 30;
+pub const EMLINK: ::c_int = 31;
+pub const EPIPE: ::c_int = 32;
+pub const EDOM: ::c_int = 33;
+pub const ERANGE: ::c_int = 34;
+pub const EAGAIN: ::c_int = 35;
+pub const EWOULDBLOCK: ::c_int = 35;
+pub const EINPROGRESS: ::c_int = 36;
+pub const EALREADY: ::c_int = 37;
+pub const ENOTSOCK: ::c_int = 38;
+pub const EDESTADDRREQ: ::c_int = 39;
+pub const EMSGSIZE: ::c_int = 40;
+pub const EPROTOTYPE: ::c_int = 41;
+pub const ENOPROTOOPT: ::c_int = 42;
+pub const EPROTONOSUPPORT: ::c_int = 43;
+pub const ESOCKTNOSUPPORT: ::c_int = 44;
+pub const EOPNOTSUPP: ::c_int = 45;
+pub const EPFNOSUPPORT: ::c_int = 46;
+pub const EAFNOSUPPORT: ::c_int = 47;
+pub const EADDRINUSE: ::c_int = 48;
+pub const EADDRNOTAVAIL: ::c_int = 49;
+pub const ENETDOWN: ::c_int = 50;
+pub const ENETUNREACH: ::c_int = 51;
+pub const ENETRESET: ::c_int = 52;
+pub const ECONNABORTED: ::c_int = 53;
+pub const ECONNRESET: ::c_int = 54;
+pub const ENOBUFS: ::c_int = 55;
+pub const EISCONN: ::c_int = 56;
+pub const ENOTCONN: ::c_int = 57;
+pub const ESHUTDOWN: ::c_int = 58;
+pub const ETOOMANYREFS: ::c_int = 59;
+pub const ETIMEDOUT: ::c_int = 60;
+pub const ECONNREFUSED: ::c_int = 61;
+pub const ELOOP: ::c_int = 62;
+pub const ENAMETOOLONG: ::c_int = 63;
+pub const EHOSTDOWN: ::c_int = 64;
+pub const EHOSTUNREACH: ::c_int = 65;
+pub const ENOTEMPTY: ::c_int = 66;
+pub const EPROCLIM: ::c_int = 67;
+pub const EUSERS: ::c_int = 68;
+pub const EDQUOT: ::c_int = 69;
+pub const ESTALE: ::c_int = 70;
+pub const EREMOTE: ::c_int = 71;
+pub const EBADRPC: ::c_int = 72;
+pub const ERPCMISMATCH: ::c_int = 73;
+pub const EPROGUNAVAIL: ::c_int = 74;
+pub const EPROGMISMATCH: ::c_int = 75;
+pub const EPROCUNAVAIL: ::c_int = 76;
+pub const ENOLCK: ::c_int = 77;
+pub const ENOSYS: ::c_int = 78;
+pub const EFTYPE: ::c_int = 79;
+pub const EAUTH: ::c_int = 80;
+pub const ENEEDAUTH: ::c_int = 81;
+pub const EIDRM: ::c_int = 82;
+pub const ENOMSG: ::c_int = 83;
+pub const EOVERFLOW: ::c_int = 84;
+pub const ECANCELED: ::c_int = 85;
+pub const EILSEQ: ::c_int = 86;
+pub const ENOATTR: ::c_int = 87;
+pub const EDOOFUS: ::c_int = 88;
+pub const EBADMSG: ::c_int = 89;
+pub const EMULTIHOP: ::c_int = 90;
+pub const ENOLINK: ::c_int = 91;
+pub const EPROTO: ::c_int = 92;
+pub const ELAST: ::c_int = 96;
+
+pub const F_DUPFD: ::c_int = 0;
+pub const F_GETFD: ::c_int = 1;
+pub const F_SETFD: ::c_int = 2;
+pub const F_GETFL: ::c_int = 3;
+pub const F_SETFL: ::c_int = 4;
+
+pub const SIGTRAP: ::c_int = 5;
+
+pub const GLOB_APPEND  : ::c_int = 0x0001;
+pub const GLOB_DOOFFS  : ::c_int = 0x0002;
+pub const GLOB_ERR     : ::c_int = 0x0004;
+pub const GLOB_MARK    : ::c_int = 0x0008;
+pub const GLOB_NOCHECK : ::c_int = 0x0010;
+pub const GLOB_NOSORT  : ::c_int = 0x0020;
+pub const GLOB_NOESCAPE: ::c_int = 0x2000;
+
+pub const GLOB_NOSPACE : ::c_int = -1;
+pub const GLOB_ABORTED : ::c_int = -2;
+pub const GLOB_NOMATCH : ::c_int = -3;
+
+pub const POSIX_MADV_NORMAL: ::c_int = 0;
+pub const POSIX_MADV_RANDOM: ::c_int = 1;
+pub const POSIX_MADV_SEQUENTIAL: ::c_int = 2;
+pub const POSIX_MADV_WILLNEED: ::c_int = 3;
+pub const POSIX_MADV_DONTNEED: ::c_int = 4;
+
+pub const _SC_IOV_MAX: ::c_int = 56;
+pub const _SC_GETGR_R_SIZE_MAX: ::c_int = 70;
+pub const _SC_GETPW_R_SIZE_MAX: ::c_int = 71;
+pub const _SC_LOGIN_NAME_MAX: ::c_int = 73;
+pub const _SC_MQ_PRIO_MAX: ::c_int = 75;
+pub const _SC_THREAD_ATTR_STACKADDR: ::c_int = 82;
+pub const _SC_THREAD_ATTR_STACKSIZE: ::c_int = 83;
+pub const _SC_THREAD_DESTRUCTOR_ITERATIONS: ::c_int = 85;
+pub const _SC_THREAD_KEYS_MAX: ::c_int = 86;
+pub const _SC_THREAD_PRIO_INHERIT: ::c_int = 87;
+pub const _SC_THREAD_PRIO_PROTECT: ::c_int = 88;
+pub const _SC_THREAD_PRIORITY_SCHEDULING: ::c_int = 89;
+pub const _SC_THREAD_PROCESS_SHARED: ::c_int = 90;
+pub const _SC_THREAD_SAFE_FUNCTIONS: ::c_int = 91;
+pub const _SC_THREAD_STACK_MIN: ::c_int = 93;
+pub const _SC_THREAD_THREADS_MAX: ::c_int = 94;
+pub const _SC_THREADS: ::c_int = 96;
+pub const _SC_TTY_NAME_MAX: ::c_int = 101;
+pub const _SC_ATEXIT_MAX: ::c_int = 107;
+pub const _SC_XOPEN_CRYPT: ::c_int = 108;
+pub const _SC_XOPEN_ENH_I18N: ::c_int = 109;
+pub const _SC_XOPEN_LEGACY: ::c_int = 110;
+pub const _SC_XOPEN_REALTIME: ::c_int = 111;
+pub const _SC_XOPEN_REALTIME_THREADS: ::c_int = 112;
+pub const _SC_XOPEN_SHM: ::c_int = 113;
+pub const _SC_XOPEN_UNIX: ::c_int = 115;
+pub const _SC_XOPEN_VERSION: ::c_int = 116;
+pub const _SC_XOPEN_XCU_VERSION: ::c_int = 117;
+
+pub const PTHREAD_CREATE_JOINABLE: ::c_int = 0;
+pub const PTHREAD_CREATE_DETACHED: ::c_int = 1;
+
+pub const CLOCK_REALTIME: ::c_int = 0;
+pub const CLOCK_MONOTONIC: ::c_int = 4;
+
+pub const RLIMIT_CPU: ::c_int = 0;
+pub const RLIMIT_FSIZE: ::c_int = 1;
+pub const RLIMIT_DATA: ::c_int = 2;
+pub const RLIMIT_STACK: ::c_int = 3;
+pub const RLIMIT_CORE: ::c_int = 4;
+pub const RLIMIT_RSS: ::c_int = 5;
+pub const RLIMIT_MEMLOCK: ::c_int = 6;
+pub const RLIMIT_NPROC: ::c_int = 7;
+pub const RLIMIT_NOFILE: ::c_int = 8;
+pub const RLIMIT_SBSIZE: ::c_int = 9;
+pub const RLIMIT_VMEM: ::c_int = 10;
+pub const RLIMIT_AS: ::c_int = RLIMIT_VMEM;
+pub const RLIMIT_NPTS: ::c_int = 11;
+pub const RLIMIT_SWAP: ::c_int = 12;
+
+pub const RLIM_NLIMITS: rlim_t = 13;
+pub const RLIM_INFINITY: rlim_t = 0x7fff_ffff_ffff_ffff;
+
+pub const RUSAGE_SELF: ::c_int = 0;
+pub const RUSAGE_CHILDREN: ::c_int = -1;
+pub const RUSAGE_THREAD: ::c_int = 1;
+
+pub const MADV_NORMAL: ::c_int = 0;
+pub const MADV_RANDOM: ::c_int = 1;
+pub const MADV_SEQUENTIAL: ::c_int = 2;
+pub const MADV_WILLNEED: ::c_int = 3;
+pub const MADV_DONTNEED: ::c_int = 4;
+pub const MADV_FREE: ::c_int = 5;
+pub const MADV_NOSYNC: ::c_int = 6;
+pub const MADV_AUTOSYNC: ::c_int = 7;
+pub const MADV_NOCORE: ::c_int = 8;
+pub const MADV_CORE: ::c_int = 9;
+pub const MADV_PROTECT: ::c_int = 10;
+
+pub const MINCORE_INCORE: ::c_int =  0x1;
+pub const MINCORE_REFERENCED: ::c_int = 0x2;
+pub const MINCORE_MODIFIED: ::c_int = 0x4;
+pub const MINCORE_REFERENCED_OTHER: ::c_int = 0x8;
+pub const MINCORE_MODIFIED_OTHER: ::c_int = 0x10;
+pub const MINCORE_SUPER: ::c_int = 0x20;
+
+pub const AF_INET: ::c_int = 2;
+pub const AF_INET6: ::c_int = 28;
+pub const AF_UNIX: ::c_int = 1;
+pub const SOCK_STREAM: ::c_int = 1;
+pub const SOCK_DGRAM: ::c_int = 2;
+pub const SOCK_RAW: ::c_int = 3;
+pub const IPPROTO_TCP: ::c_int = 6;
+pub const IPPROTO_IP: ::c_int = 0;
+pub const IPPROTO_IPV6: ::c_int = 41;
+pub const IP_MULTICAST_TTL: ::c_int = 10;
+pub const IP_MULTICAST_LOOP: ::c_int = 11;
+pub const IP_TTL: ::c_int = 4;
+pub const IP_HDRINCL: ::c_int = 2;
+pub const IP_ADD_MEMBERSHIP: ::c_int = 12;
+pub const IP_DROP_MEMBERSHIP: ::c_int = 13;
+pub const IPV6_JOIN_GROUP: ::c_int = 12;
+pub const IPV6_LEAVE_GROUP: ::c_int = 13;
+
+pub const TCP_NODELAY: ::c_int = 1;
+pub const TCP_KEEPIDLE: ::c_int = 256;
+pub const SOL_SOCKET: ::c_int = 0xffff;
+pub const SO_DEBUG: ::c_int = 0x01;
+pub const SO_ACCEPTCONN: ::c_int = 0x0002;
+pub const SO_REUSEADDR: ::c_int = 0x0004;
+pub const SO_KEEPALIVE: ::c_int = 0x0008;
+pub const SO_DONTROUTE: ::c_int = 0x0010;
+pub const SO_BROADCAST: ::c_int = 0x0020;
+pub const SO_USELOOPBACK: ::c_int = 0x0040;
+pub const SO_LINGER: ::c_int = 0x0080;
+pub const SO_OOBINLINE: ::c_int = 0x0100;
+pub const SO_REUSEPORT: ::c_int = 0x0200;
+pub const SO_SNDBUF: ::c_int = 0x1001;
+pub const SO_RCVBUF: ::c_int = 0x1002;
+pub const SO_SNDLOWAT: ::c_int = 0x1003;
+pub const SO_RCVLOWAT: ::c_int = 0x1004;
+pub const SO_SNDTIMEO: ::c_int = 0x1005;
+pub const SO_RCVTIMEO: ::c_int = 0x1006;
+pub const SO_ERROR: ::c_int = 0x1007;
+pub const SO_TYPE: ::c_int = 0x1008;
+
+pub const IFF_LOOPBACK: ::c_int = 0x8;
+
+pub const SHUT_RD: ::c_int = 0;
+pub const SHUT_WR: ::c_int = 1;
+pub const SHUT_RDWR: ::c_int = 2;
+
+pub const LOCK_SH: ::c_int = 1;
+pub const LOCK_EX: ::c_int = 2;
+pub const LOCK_NB: ::c_int = 4;
+pub const LOCK_UN: ::c_int = 8;
+
+pub const O_SYNC: ::c_int = 128;
+pub const O_NONBLOCK: ::c_int = 4;
+pub const CTL_KERN: ::c_int = 1;
+pub const KERN_PROC: ::c_int = 14;
+
+pub const MAP_COPY: ::c_int = 0x0002;
+pub const MAP_RENAME: ::c_int = 0x0020;
+pub const MAP_NORESERVE: ::c_int = 0x0040;
+pub const MAP_HASSEMAPHORE: ::c_int = 0x0200;
+pub const MAP_STACK: ::c_int = 0x0400;
+pub const MAP_NOSYNC: ::c_int = 0x0800;
+pub const MAP_NOCORE: ::c_int = 0x020000;
+
+pub const IPPROTO_RAW: ::c_int = 255;
+
+pub const _SC_ARG_MAX: ::c_int = 1;
+pub const _SC_CHILD_MAX: ::c_int = 2;
+pub const _SC_CLK_TCK: ::c_int = 3;
+pub const _SC_NGROUPS_MAX: ::c_int = 4;
+pub const _SC_OPEN_MAX: ::c_int = 5;
+pub const _SC_JOB_CONTROL: ::c_int = 6;
+pub const _SC_SAVED_IDS: ::c_int = 7;
+pub const _SC_VERSION: ::c_int = 8;
+pub const _SC_BC_BASE_MAX: ::c_int = 9;
+pub const _SC_BC_DIM_MAX: ::c_int = 10;
+pub const _SC_BC_SCALE_MAX: ::c_int = 11;
+pub const _SC_BC_STRING_MAX: ::c_int = 12;
+pub const _SC_COLL_WEIGHTS_MAX: ::c_int = 13;
+pub const _SC_EXPR_NEST_MAX: ::c_int = 14;
+pub const _SC_LINE_MAX: ::c_int = 15;
+pub const _SC_RE_DUP_MAX: ::c_int = 16;
+pub const _SC_2_VERSION: ::c_int = 17;
+pub const _SC_2_C_BIND: ::c_int = 18;
+pub const _SC_2_C_DEV: ::c_int = 19;
+pub const _SC_2_CHAR_TERM: ::c_int = 20;
+pub const _SC_2_FORT_DEV: ::c_int = 21;
+pub const _SC_2_FORT_RUN: ::c_int = 22;
+pub const _SC_2_LOCALEDEF: ::c_int = 23;
+pub const _SC_2_SW_DEV: ::c_int = 24;
+pub const _SC_2_UPE: ::c_int = 25;
+pub const _SC_STREAM_MAX: ::c_int = 26;
+pub const _SC_TZNAME_MAX: ::c_int = 27;
+pub const _SC_ASYNCHRONOUS_IO: ::c_int = 28;
+pub const _SC_MAPPED_FILES: ::c_int = 29;
+pub const _SC_MEMLOCK: ::c_int = 30;
+pub const _SC_MEMLOCK_RANGE: ::c_int = 31;
+pub const _SC_MEMORY_PROTECTION: ::c_int = 32;
+pub const _SC_MESSAGE_PASSING: ::c_int = 33;
+pub const _SC_PRIORITIZED_IO: ::c_int = 34;
+pub const _SC_PRIORITY_SCHEDULING: ::c_int = 35;
+pub const _SC_REALTIME_SIGNALS: ::c_int = 36;
+pub const _SC_SEMAPHORES: ::c_int = 37;
+pub const _SC_FSYNC: ::c_int = 38;
+pub const _SC_SHARED_MEMORY_OBJECTS: ::c_int = 39;
+pub const _SC_SYNCHRONIZED_IO: ::c_int = 40;
+pub const _SC_TIMERS: ::c_int = 41;
+pub const _SC_AIO_LISTIO_MAX: ::c_int = 42;
+pub const _SC_AIO_MAX: ::c_int = 43;
+pub const _SC_AIO_PRIO_DELTA_MAX: ::c_int = 44;
+pub const _SC_DELAYTIMER_MAX: ::c_int = 45;
+pub const _SC_MQ_OPEN_MAX: ::c_int = 46;
+pub const _SC_PAGESIZE: ::c_int = 47;
+pub const _SC_RTSIG_MAX: ::c_int = 48;
+pub const _SC_SEM_NSEMS_MAX: ::c_int = 49;
+pub const _SC_SEM_VALUE_MAX: ::c_int = 50;
+pub const _SC_SIGQUEUE_MAX: ::c_int = 51;
+pub const _SC_TIMER_MAX: ::c_int = 52;
+
+pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = 0 as *mut _;
+pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = 0 as *mut _;
+pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = 0 as *mut _;
+pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 2;
+
+extern {
+    pub fn mprotect(addr: *const ::c_void, len: size_t, prot: ::c_int)
+                    -> ::c_int;
+    pub fn shm_open(name: *const ::c_char, oflag: ::c_int, mode: ::mode_t)
+                    -> ::c_int;
+    pub fn sysctl(name: *const ::c_int,
+                  namelen: ::c_uint,
+                  oldp: *mut ::c_void,
+                  oldlenp: *mut size_t,
+                  newp: *const ::c_void,
+                  newlen: size_t)
+                  -> ::c_int;
+    pub fn sysctlbyname(name: *const ::c_char,
+                        oldp: *mut ::c_void,
+                        oldlenp: *mut size_t,
+                        newp: *const ::c_void,
+                        newlen: size_t)
+                        -> ::c_int;
+    pub fn clock_gettime(clk_id: ::c_int, tp: *mut ::timespec) -> ::c_int;
+    pub fn pthread_set_name_np(tid: ::pthread_t, name: *const ::c_char);
+}
+
+cfg_if! {
+    if #[cfg(target_arch = "x86")] {
+        mod x86;
+        pub use self::x86::*;
+    } else if #[cfg(target_arch = "x86_64")] {
+        mod x86_64;
+        pub use self::x86_64::*;
+    } else {
+        // ...
+    }
+}
+
+cfg_if! {
+    if #[cfg(target_os = "freebsd")] {
+        mod freebsd;
+        pub use self::freebsd::*;
+    } else if #[cfg(target_os = "dragonfly")] {
+        mod dragonfly;
+        pub use self::dragonfly::*;
+    } else {
+        // ...
+    }
+}
diff --git a/src/unix/bsd/freebsdlike/x86.rs b/src/unix/bsd/freebsdlike/x86.rs
new file mode 100644
index 0000000000..8a5e5f9fb8
--- /dev/null
+++ b/src/unix/bsd/freebsdlike/x86.rs
@@ -0,0 +1,31 @@
+pub type c_long = i32;
+pub type c_ulong = u32;
+pub type time_t = i32;
+pub type suseconds_t = i32;
+
+s! {
+    pub struct stat {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino_t,
+        pub st_mode: ::mode_t,
+        pub st_nlink: ::nlink_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        pub st_rdev: ::dev_t,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        pub st_size: ::off_t,
+        pub st_blocks: ::blkcnt_t,
+        pub st_blksize: ::blksize_t,
+        pub st_flags: ::fflags_t,
+        pub st_gen: ::uint32_t,
+        pub st_lspare: ::int32_t,
+        pub st_birthtime: ::time_t,
+        pub st_birthtime_nsec: ::c_long,
+        __unused: [u8; 8],
+    }
+}
diff --git a/src/unix/bsd/freebsdlike/x86_64.rs b/src/unix/bsd/freebsdlike/x86_64.rs
new file mode 100644
index 0000000000..a2da8452c4
--- /dev/null
+++ b/src/unix/bsd/freebsdlike/x86_64.rs
@@ -0,0 +1,30 @@
+pub type c_long = i64;
+pub type c_ulong = u64;
+pub type time_t = i64;
+pub type suseconds_t = i64;
+
+s! {
+    pub struct stat {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino_t,
+        pub st_mode: ::mode_t,
+        pub st_nlink: ::nlink_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        pub st_rdev: ::dev_t,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        pub st_size: ::off_t,
+        pub st_blocks: ::blkcnt_t,
+        pub st_blksize: ::blksize_t,
+        pub st_flags: ::fflags_t,
+        pub st_gen: ::uint32_t,
+        pub st_lspare: ::int32_t,
+        pub st_birthtime: ::time_t,
+        pub st_birthtime_nsec: ::c_long,
+    }
+}
diff --git a/src/unix/bsd/mod.rs b/src/unix/bsd/mod.rs
new file mode 100644
index 0000000000..8c8460ef2d
--- /dev/null
+++ b/src/unix/bsd/mod.rs
@@ -0,0 +1,105 @@
+pub type c_char = i8;
+pub type wchar_t = i32;
+pub type off_t = i64;
+pub type useconds_t = u32;
+pub type blkcnt_t = i64;
+pub type socklen_t = u32;
+pub type sa_family_t = u8;
+pub type pthread_t = ::uintptr_t;
+
+s! {
+    pub struct sockaddr {
+        pub sa_len: u8,
+        pub sa_family: sa_family_t,
+        pub sa_data: [::c_char; 14],
+    }
+
+    pub struct sockaddr_in {
+        pub sin_len: u8,
+        pub sin_family: sa_family_t,
+        pub sin_port: ::in_port_t,
+        pub sin_addr: ::in_addr,
+        pub sin_zero: [::c_char; 8],
+    }
+
+    pub struct sockaddr_in6 {
+        pub sin6_len: u8,
+        pub sin6_family: sa_family_t,
+        pub sin6_port: ::in_port_t,
+        pub sin6_flowinfo: u32,
+        pub sin6_addr: ::in6_addr,
+        pub sin6_scope_id: u32,
+    }
+
+    pub struct sockaddr_un {
+        pub sun_len: u8,
+        pub sun_family: sa_family_t,
+        pub sun_path: [c_char; 104]
+    }
+
+    pub struct passwd {
+        pub pw_name: *mut ::c_char,
+        pub pw_passwd: *mut ::c_char,
+        pub pw_uid: ::uid_t,
+        pub pw_gid: ::gid_t,
+        pub pw_change: ::time_t,
+        pub pw_class: *mut ::c_char,
+        pub pw_gecos: *mut ::c_char,
+        pub pw_dir: *mut ::c_char,
+        pub pw_shell: *mut ::c_char,
+        pub pw_expire: ::time_t,
+
+        #[cfg(not(any(target_os = "macos", target_os = "ios")))]
+        pub pw_fields: ::c_int,
+    }
+
+    pub struct ifaddrs {
+        pub ifa_next: *mut ifaddrs,
+        pub ifa_name: *mut ::c_char,
+        pub ifa_flags: ::c_uint,
+        pub ifa_addr: *mut ::sockaddr,
+        pub ifa_netmask: *mut ::sockaddr,
+        pub ifa_dstaddr: *mut ::sockaddr,
+        pub ifa_data: *mut ::c_void
+    }
+}
+
+pub const FIOCLEX: c_ulong = 0x20006601;
+pub const FIONBIO: ::c_int = 0x8004667e;
+
+pub const SA_ONSTACK: ::c_int = 0x0001;
+pub const SA_SIGINFO: ::c_int = 0x0040;
+
+pub const SIGBUS: ::c_int = 10;
+pub const SIG_SETMASK: ::c_int = 3;
+
+pub const IPV6_MULTICAST_LOOP: ::c_int = 11;
+pub const IPV6_V6ONLY: ::c_int = 27;
+
+extern {
+    pub fn mincore(addr: *const ::c_void, len: ::size_t,
+                   vec: *mut c_char) -> ::c_int;
+    pub fn sysctlnametomib(name: *const c_char,
+                           mibp: *mut ::c_int,
+                           sizep: *mut ::size_t)
+                           -> ::c_int;
+    pub fn setgroups(ngroups: ::c_int,
+                     ptr: *const ::gid_t) -> ::c_int;
+    pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
+}
+
+cfg_if! {
+    if #[cfg(any(target_os = "macos", target_os = "ios"))] {
+        mod apple;
+        pub use self::apple::*;
+    } else if #[cfg(any(target_os = "openbsd", target_os = "netbsd",
+                        target_os = "dragonfly"))] {
+        mod openbsdlike;
+        pub use self::openbsdlike::*;
+    } else if #[cfg(any(target_os = "freebsd", target_os = "dragonfly"))] {
+        mod freebsdlike;
+        pub use self::freebsdlike::*;
+    } else {
+        // ...
+    }
+}
diff --git a/src/unix/bsd/openbsdlike/bitrig.rs b/src/unix/bsd/openbsdlike/bitrig.rs
new file mode 100644
index 0000000000..9039ff446c
--- /dev/null
+++ b/src/unix/bsd/openbsdlike/bitrig.rs
@@ -0,0 +1,16 @@
+s! {
+    pub struct glob_t {
+        pub gl_pathc:  c_int,
+        pub gl_matchc: c_int,
+        pub gl_offs:   c_int,
+        pub gl_flags:  c_int,
+        pub gl_pathv:  *mut *mut c_char,
+        __unused1: *mut c_void,
+        __unused2: *mut c_void,
+        __unused3: *mut c_void,
+        __unused4: *mut c_void,
+        __unused5: *mut c_void,
+        __unused6: *mut c_void,
+        __unused7: *mut c_void,
+    }
+}
diff --git a/src/unix/bsd/openbsdlike/mod.rs b/src/unix/bsd/openbsdlike/mod.rs
new file mode 100644
index 0000000000..ecd1579e0c
--- /dev/null
+++ b/src/unix/bsd/openbsdlike/mod.rs
@@ -0,0 +1,531 @@
+pub type c_long = i64;
+pub type c_ulong = u64;
+pub type clock_t = i64;
+pub type time_t = i64;
+pub type suseconds_t = i64;
+pub type dev_t = i32;
+pub type mode_t = u32;
+pub type nlink_t = uint32_t;
+pub type blksize_t = uint32_t;
+pub type ino_t = uint64_t;
+pub type fflags_t = u32;
+pub type pthread_attr_t = *mut c_void;
+pub type sigset_t = ::c_uint;
+pub type pthread_key_t = ::c_int;
+pub type pthread_mutex_t = *mut ::c_void;
+pub type pthread_mutexattr_t = *mut ::c_void;
+pub type pthread_cond_t = *mut ::c_void;
+pub type pthread_rwlock_t = *mut ::c_void;
+pub type rlim_t = u64;
+
+
+pub enum timezone {}
+
+s! {
+    pub struct siginfo_t {
+        pub si_signo: ::c_int,
+        pub si_code: ::c_int,
+        pub si_errno: ::c_int,
+        pub si_addr: *mut ::c_void
+    }
+
+    pub struct sigaction {
+        pub sa_sigaction: sighandler_t,
+        pub sa_mask: sigset_t,
+        pub sa_flags: ::c_int,
+    }
+
+    pub struct stack_t {
+        pub ss_sp: *mut ::c_void,
+        pub ss_size: ::size_t,
+        pub ss_flags: ::c_int,
+    }
+
+    pub struct sockaddr_storage {
+        pub ss_len: u8,
+        pub ss_family: sa_family_t,
+        __ss_pad1: [u8; 6],
+        __ss_pad2: i64,
+        __ss_pad3: [u8; 240],
+    }
+
+    pub struct addrinfo {
+        pub ai_flags: c_int,
+        pub ai_family: c_int,
+        pub ai_socktype: c_int,
+        pub ai_protocol: c_int,
+        pub ai_addrlen: socklen_t,
+        pub ai_addr: *mut sockaddr,
+        pub ai_canonname: *mut c_char,
+        pub ai_next: *mut addrinfo,
+    }
+
+    pub struct stat {
+        pub st_mode: mode_t,
+        pub st_dev: dev_t,
+        pub st_ino: ino_t,
+        pub st_nlink: nlink_t,
+        pub st_uid: uid_t,
+        pub st_gid: gid_t,
+        pub st_rdev: dev_t,
+        pub st_atime: time_t,
+        pub st_atime_nsec: c_long,
+        pub st_mtime: time_t,
+        pub st_mtime_nsec: c_long,
+        pub st_ctime: time_t,
+        pub st_ctime_nsec: c_long,
+        pub st_size: off_t,
+        pub st_blocks: blkcnt_t,
+        pub st_blksize: blksize_t,
+        pub st_flags: fflags_t,
+        pub st_gen: uint32_t,
+        pub st_birthtime: time_t,
+        pub st_birthtime_nsec: c_long,
+    }
+
+    pub struct stack_t {
+        pub ss_sp: *mut ::c_void,
+        pub ss_size: ::size_t,
+        pub ss_flags: ::c_int,
+    }
+}
+
+pub const EXIT_FAILURE : c_int = 1;
+pub const EXIT_SUCCESS : c_int = 0;
+pub const RAND_MAX : c_int = 2147483647;
+pub const EOF : c_int = -1;
+pub const SEEK_SET : c_int = 0;
+pub const SEEK_CUR : c_int = 1;
+pub const SEEK_END : c_int = 2;
+pub const _IOFBF : c_int = 0;
+pub const _IONBF : c_int = 2;
+pub const _IOLBF : c_int = 1;
+pub const BUFSIZ : c_uint = 1024;
+pub const FOPEN_MAX : c_uint = 20;
+pub const FILENAME_MAX : c_uint = 1024;
+pub const L_tmpnam : c_uint = 1024;
+pub const TMP_MAX : c_uint = 308915776;
+pub const O_RDONLY : c_int = 0;
+pub const O_WRONLY : c_int = 1;
+pub const O_RDWR : c_int = 2;
+pub const O_APPEND : c_int = 8;
+pub const O_CREAT : c_int = 512;
+pub const O_EXCL : c_int = 2048;
+pub const O_NOCTTY : c_int = 32768;
+pub const O_TRUNC : c_int = 1024;
+pub const S_IFIFO : mode_t = 4096;
+pub const S_IFCHR : mode_t = 8192;
+pub const S_IFBLK : mode_t = 24576;
+pub const S_IFDIR : mode_t = 16384;
+pub const S_IFREG : mode_t = 32768;
+pub const S_IFLNK : mode_t = 40960;
+pub const S_IFSOCK : mode_t = 49152;
+pub const S_IFMT : mode_t = 61440;
+pub const S_IEXEC : mode_t = 64;
+pub const S_IWRITE : mode_t = 128;
+pub const S_IREAD : mode_t = 256;
+pub const S_IRWXU : mode_t = 448;
+pub const S_IXUSR : mode_t = 64;
+pub const S_IWUSR : mode_t = 128;
+pub const S_IRUSR : mode_t = 256;
+pub const S_IRWXG : mode_t = 56;
+pub const S_IXGRP : mode_t = 8;
+pub const S_IWGRP : mode_t = 16;
+pub const S_IRGRP : mode_t = 32;
+pub const S_IRWXO : mode_t = 7;
+pub const S_IXOTH : mode_t = 1;
+pub const S_IWOTH : mode_t = 2;
+pub const S_IROTH : mode_t = 4;
+pub const F_OK : c_int = 0;
+pub const R_OK : c_int = 4;
+pub const W_OK : c_int = 2;
+pub const X_OK : c_int = 1;
+pub const STDIN_FILENO : c_int = 0;
+pub const STDOUT_FILENO : c_int = 1;
+pub const STDERR_FILENO : c_int = 2;
+pub const F_LOCK : c_int = 1;
+pub const F_TEST : c_int = 3;
+pub const F_TLOCK : c_int = 2;
+pub const F_ULOCK : c_int = 0;
+pub const SIGHUP : c_int = 1;
+pub const SIGINT : c_int = 2;
+pub const SIGQUIT : c_int = 3;
+pub const SIGILL : c_int = 4;
+pub const SIGABRT : c_int = 6;
+pub const SIGFPE : c_int = 8;
+pub const SIGKILL : c_int = 9;
+pub const SIGSEGV : c_int = 11;
+pub const SIGPIPE : c_int = 13;
+pub const SIGALRM : c_int = 14;
+pub const SIGTERM : c_int = 15;
+
+pub const PROT_NONE : c_int = 0;
+pub const PROT_READ : c_int = 1;
+pub const PROT_WRITE : c_int = 2;
+pub const PROT_EXEC : c_int = 4;
+
+pub const MAP_FILE : c_int = 0x0000;
+pub const MAP_SHARED : c_int = 0x0001;
+pub const MAP_PRIVATE : c_int = 0x0002;
+pub const MAP_FIXED : c_int = 0x0010;
+pub const MAP_ANON : c_int = 0x1000;
+
+pub const MAP_FAILED : *mut c_void = !0 as *mut c_void;
+
+pub const MCL_CURRENT : c_int = 0x0001;
+pub const MCL_FUTURE : c_int = 0x0002;
+
+pub const MS_ASYNC : c_int = 0x0001;
+pub const MS_SYNC : c_int = 0x0002;
+pub const MS_INVALIDATE : c_int = 0x0004;
+
+pub const EPERM : c_int = 1;
+pub const ENOENT : c_int = 2;
+pub const ESRCH : c_int = 3;
+pub const EINTR : c_int = 4;
+pub const EIO : c_int = 5;
+pub const ENXIO : c_int = 6;
+pub const E2BIG : c_int = 7;
+pub const ENOEXEC : c_int = 8;
+pub const EBADF : c_int = 9;
+pub const ECHILD : c_int = 10;
+pub const EDEADLK : c_int = 11;
+pub const ENOMEM : c_int = 12;
+pub const EACCES : c_int = 13;
+pub const EFAULT : c_int = 14;
+pub const ENOTBLK : c_int = 15;
+pub const EBUSY : c_int = 16;
+pub const EEXIST : c_int = 17;
+pub const EXDEV : c_int = 18;
+pub const ENODEV : c_int = 19;
+pub const ENOTDIR : c_int = 20;
+pub const EISDIR : c_int = 21;
+pub const EINVAL : c_int = 22;
+pub const ENFILE : c_int = 23;
+pub const EMFILE : c_int = 24;
+pub const ENOTTY : c_int = 25;
+pub const ETXTBSY : c_int = 26;
+pub const EFBIG : c_int = 27;
+pub const ENOSPC : c_int = 28;
+pub const ESPIPE : c_int = 29;
+pub const EROFS : c_int = 30;
+pub const EMLINK : c_int = 31;
+pub const EPIPE : c_int = 32;
+pub const EDOM : c_int = 33;
+pub const ERANGE : c_int = 34;
+pub const EAGAIN : c_int = 35;
+pub const EWOULDBLOCK : c_int = 35;
+pub const EINPROGRESS : c_int = 36;
+pub const EALREADY : c_int = 37;
+pub const ENOTSOCK : c_int = 38;
+pub const EDESTADDRREQ : c_int = 39;
+pub const EMSGSIZE : c_int = 40;
+pub const EPROTOTYPE : c_int = 41;
+pub const ENOPROTOOPT : c_int = 42;
+pub const EPROTONOSUPPORT : c_int = 43;
+pub const ESOCKTNOSUPPORT : c_int = 44;
+pub const EOPNOTSUPP : c_int = 45;
+pub const EPFNOSUPPORT : c_int = 46;
+pub const EAFNOSUPPORT : c_int = 47;
+pub const EADDRINUSE : c_int = 48;
+pub const EADDRNOTAVAIL : c_int = 49;
+pub const ENETDOWN : c_int = 50;
+pub const ENETUNREACH : c_int = 51;
+pub const ENETRESET : c_int = 52;
+pub const ECONNABORTED : c_int = 53;
+pub const ECONNRESET : c_int = 54;
+pub const ENOBUFS : c_int = 55;
+pub const EISCONN : c_int = 56;
+pub const ENOTCONN : c_int = 57;
+pub const ESHUTDOWN : c_int = 58;
+pub const ETOOMANYREFS : c_int = 59;
+pub const ETIMEDOUT : c_int = 60;
+pub const ECONNREFUSED : c_int = 61;
+pub const ELOOP : c_int = 62;
+pub const ENAMETOOLONG : c_int = 63;
+pub const EHOSTDOWN : c_int = 64;
+pub const EHOSTUNREACH : c_int = 65;
+pub const ENOTEMPTY : c_int = 66;
+pub const EPROCLIM : c_int = 67;
+pub const EUSERS : c_int = 68;
+pub const EDQUOT : c_int = 69;
+pub const ESTALE : c_int = 70;
+pub const EREMOTE : c_int = 71;
+pub const EBADRPC : c_int = 72;
+pub const ERPCMISMATCH : c_int = 73;
+pub const EPROGUNAVAIL : c_int = 74;
+pub const EPROGMISMATCH : c_int = 75;
+pub const EPROCUNAVAIL : c_int = 76;
+pub const ENOLCK : c_int = 77;
+pub const ENOSYS : c_int = 78;
+pub const EFTYPE : c_int = 79;
+pub const EAUTH : c_int = 80;
+pub const ENEEDAUTH : c_int = 81;
+pub const EIPSEC : c_int = 82;
+pub const ENOATTR : c_int = 83;
+pub const EILSEQ : c_int = 84;
+pub const ENOMEDIUM : c_int = 85;
+pub const EMEDIUMTYPE : c_int = 86;
+pub const EOVERFLOW : c_int = 87;
+pub const ECANCELED : c_int = 88;
+pub const EIDRM : c_int = 89;
+pub const ENOMSG : c_int = 90;
+pub const ENOTSUP : c_int = 91;
+pub const ELAST : c_int = 91; // must be equal to largest errno
+
+pub const F_DUPFD : c_int = 0;
+pub const F_GETFD : c_int = 1;
+pub const F_SETFD : c_int = 2;
+pub const F_GETFL : c_int = 3;
+pub const F_SETFL : c_int = 4;
+pub const F_GETOWN : c_int = 5;
+pub const F_SETOWN : c_int = 6;
+pub const F_GETLK : c_int = 7;
+pub const F_SETLK : c_int = 8;
+pub const F_SETLKW : c_int = 9;
+pub const F_DUPFD_CLOEXEC : c_int = 10;
+
+pub const SIGTRAP : c_int = 5;
+
+pub const GLOB_APPEND   : c_int = 0x0001;
+pub const GLOB_DOOFFS   : c_int = 0x0002;
+pub const GLOB_ERR      : c_int = 0x0004;
+pub const GLOB_MARK     : c_int = 0x0008;
+pub const GLOB_NOCHECK  : c_int = 0x0010;
+pub const GLOB_NOSORT   : c_int = 0x0020;
+pub const GLOB_NOESCAPE : c_int = 0x1000;
+
+pub const GLOB_NOSPACE  : c_int = -1;
+pub const GLOB_ABORTED  : c_int = -2;
+pub const GLOB_NOMATCH  : c_int = -3;
+pub const GLOB_NOSYS : c_int = -4;
+
+pub const POSIX_MADV_NORMAL : c_int = 0;
+pub const POSIX_MADV_RANDOM : c_int = 1;
+pub const POSIX_MADV_SEQUENTIAL : c_int = 2;
+pub const POSIX_MADV_WILLNEED : c_int = 3;
+pub const POSIX_MADV_DONTNEED : c_int = 4;
+
+pub const _SC_IOV_MAX : c_int = 51;
+pub const _SC_GETGR_R_SIZE_MAX : c_int = 100;
+pub const _SC_GETPW_R_SIZE_MAX : c_int = 101;
+pub const _SC_LOGIN_NAME_MAX : c_int = 102;
+pub const _SC_MQ_PRIO_MAX : c_int = 59;
+pub const _SC_THREAD_ATTR_STACKADDR : c_int = 77;
+pub const _SC_THREAD_ATTR_STACKSIZE : c_int = 78;
+pub const _SC_THREAD_DESTRUCTOR_ITERATIONS : c_int = 80;
+pub const _SC_THREAD_KEYS_MAX : c_int = 81;
+pub const _SC_THREAD_PRIO_INHERIT : c_int = 82;
+pub const _SC_THREAD_PRIO_PROTECT : c_int = 83;
+pub const _SC_THREAD_PRIORITY_SCHEDULING : c_int = 84;
+pub const _SC_THREAD_PROCESS_SHARED : c_int = 85;
+pub const _SC_THREAD_SAFE_FUNCTIONS : c_int = 103;
+pub const _SC_THREAD_STACK_MIN : c_int = 89;
+pub const _SC_THREAD_THREADS_MAX : c_int = 90;
+pub const _SC_THREADS : c_int = 91;
+pub const _SC_TTY_NAME_MAX : c_int = 107;
+pub const _SC_ATEXIT_MAX : c_int = 46;
+pub const _SC_XOPEN_CRYPT : c_int = 117;
+pub const _SC_XOPEN_ENH_I18N : c_int = 118;
+pub const _SC_XOPEN_LEGACY : c_int = 119;
+pub const _SC_XOPEN_REALTIME : c_int = 120;
+pub const _SC_XOPEN_REALTIME_THREADS : c_int = 121;
+pub const _SC_XOPEN_SHM : c_int = 30;
+pub const _SC_XOPEN_UNIX : c_int = 123;
+pub const _SC_XOPEN_VERSION : c_int = 125;
+
+pub const PTHREAD_CREATE_JOINABLE : c_int = 0;
+pub const PTHREAD_CREATE_DETACHED : c_int = 1;
+pub const PTHREAD_STACK_MIN : size_t = 2048;
+
+pub const CLOCK_REALTIME : c_int = 0;
+pub const CLOCK_MONOTONIC : c_int = 3;
+
+pub const RLIMIT_CPU: c_int = 0;
+pub const RLIMIT_FSIZE: c_int = 1;
+pub const RLIMIT_DATA: c_int = 2;
+pub const RLIMIT_STACK: c_int = 3;
+pub const RLIMIT_CORE: c_int = 4;
+pub const RLIMIT_RSS: c_int = 5;
+pub const RLIMIT_MEMLOCK: c_int = 6;
+pub const RLIMIT_NPROC: c_int = 7;
+pub const RLIMIT_NOFILE: c_int = 8;
+pub const RLIM_NLIMITS: c_int = 9;
+
+pub const RLIM_INFINITY: rlim_t = 0x7fff_ffff_ffff_ffff;
+pub const RLIM_SAVED_MAX: rlim_t = RLIM_INFINITY;
+pub const RLIM_SAVED_CUR: rlim_t = RLIM_INFINITY;
+
+pub const RUSAGE_SELF: c_int = 0;
+pub const RUSAGE_CHILDREN: c_int = -1;
+pub const RUSAGE_THREAD: c_int = 1;
+
+pub const MADV_NORMAL : c_int = 0;
+pub const MADV_RANDOM : c_int = 1;
+pub const MADV_SEQUENTIAL : c_int = 2;
+pub const MADV_WILLNEED : c_int = 3;
+pub const MADV_DONTNEED : c_int = 4;
+pub const MADV_FREE : c_int = 6;
+
+pub const AF_UNIX: c_int = 1;
+pub const AF_INET: c_int = 2;
+pub const AF_INET6: c_int = 24;
+pub const SOCK_STREAM: c_int = 1;
+pub const SOCK_DGRAM: c_int = 2;
+pub const SOCK_RAW: c_int = 3;
+pub const IPPROTO_TCP: c_int = 6;
+pub const IPPROTO_IP: c_int = 0;
+pub const IPPROTO_IPV6: c_int = 41;
+pub const IP_MULTICAST_TTL: c_int = 10;
+pub const IP_MULTICAST_LOOP: c_int = 11;
+pub const IP_TTL: c_int = 4;
+pub const IP_HDRINCL: c_int = 2;
+pub const IP_ADD_MEMBERSHIP: c_int = 12;
+pub const IP_DROP_MEMBERSHIP: c_int = 13;
+pub const IPV6_ADD_MEMBERSHIP: c_int = 12; // don't exist
+pub const IPV6_DROP_MEMBERSHIP: c_int = 13; // don't exist
+
+pub const TCP_NODELAY: c_int = 0x01;
+pub const SOL_SOCKET: c_int = 0xffff;
+pub const SO_DEBUG: c_int = 0x01;
+pub const SO_ACCEPTCONN: c_int = 0x0002;
+pub const SO_REUSEADDR: c_int = 0x0004;
+pub const SO_KEEPALIVE: c_int = 0x0008;
+pub const SO_DONTROUTE: c_int = 0x0010;
+pub const SO_BROADCAST: c_int = 0x0020;
+pub const SO_USELOOPBACK: c_int = 0x0040;
+pub const SO_LINGER: c_int = 0x0080;
+pub const SO_OOBINLINE: c_int = 0x0100;
+pub const SO_REUSEPORT: c_int = 0x0200;
+pub const SO_SNDBUF: c_int = 0x1001;
+pub const SO_RCVBUF: c_int = 0x1002;
+pub const SO_SNDLOWAT: c_int = 0x1003;
+pub const SO_RCVLOWAT: c_int = 0x1004;
+pub const SO_SNDTIMEO: c_int = 0x1005;
+pub const SO_RCVTIMEO: c_int = 0x1006;
+pub const SO_ERROR: c_int = 0x1007;
+pub const SO_TYPE: c_int = 0x1008;
+
+pub const IFF_LOOPBACK: c_int = 0x8;
+
+pub const SHUT_RD: c_int = 0;
+pub const SHUT_WR: c_int = 1;
+pub const SHUT_RDWR: c_int = 2;
+
+pub const LOCK_SH: c_int = 1;
+pub const LOCK_EX: c_int = 2;
+pub const LOCK_NB: c_int = 4;
+pub const LOCK_UN: c_int = 8;
+
+pub const O_DSYNC : c_int = 128; // same as SYNC
+pub const O_SYNC : c_int = 128;
+pub const O_NONBLOCK : c_int = 4;
+pub const CTL_KERN : c_int = 1;
+pub const KERN_PROC : c_int = 66;
+
+pub const MAP_COPY : c_int = 0x0002;
+pub const MAP_RENAME : c_int = 0x0000;
+pub const MAP_NORESERVE : c_int = 0x0000;
+pub const MAP_NOEXTEND : c_int = 0x0000;
+pub const MAP_HASSEMAPHORE : c_int = 0x0000;
+
+pub const IPPROTO_RAW : c_int = 255;
+
+pub const PATH_MAX: c_int = 1024;
+
+pub const _SC_ARG_MAX : c_int = 1;
+pub const _SC_CHILD_MAX : c_int = 2;
+pub const _SC_CLK_TCK : c_int = 3;
+pub const _SC_NGROUPS_MAX : c_int = 4;
+pub const _SC_OPEN_MAX : c_int = 5;
+pub const _SC_JOB_CONTROL : c_int = 6;
+pub const _SC_SAVED_IDS : c_int = 7;
+pub const _SC_VERSION : c_int = 8;
+pub const _SC_BC_BASE_MAX : c_int = 9;
+pub const _SC_BC_DIM_MAX : c_int = 10;
+pub const _SC_BC_SCALE_MAX : c_int = 11;
+pub const _SC_BC_STRING_MAX : c_int = 12;
+pub const _SC_COLL_WEIGHTS_MAX : c_int = 13;
+pub const _SC_EXPR_NEST_MAX : c_int = 14;
+pub const _SC_LINE_MAX : c_int = 15;
+pub const _SC_RE_DUP_MAX : c_int = 16;
+pub const _SC_2_VERSION : c_int = 17;
+pub const _SC_2_C_BIND : c_int = 18;
+pub const _SC_2_C_DEV : c_int = 19;
+pub const _SC_2_CHAR_TERM : c_int = 20;
+pub const _SC_2_FORT_DEV : c_int = 21;
+pub const _SC_2_FORT_RUN : c_int = 22;
+pub const _SC_2_LOCALEDEF : c_int = 23;
+pub const _SC_2_SW_DEV : c_int = 24;
+pub const _SC_2_UPE : c_int = 25;
+pub const _SC_STREAM_MAX : c_int = 26;
+pub const _SC_TZNAME_MAX : c_int = 27;
+pub const _SC_PAGESIZE : c_int = 28;
+pub const _SC_FSYNC : c_int = 29;
+pub const _SC_SEM_NSEMS_MAX : c_int = 31;
+pub const _SC_SEM_VALUE_MAX : c_int = 32;
+pub const _SC_AIO_LISTIO_MAX : c_int = 42;
+pub const _SC_AIO_MAX : c_int = 43;
+pub const _SC_AIO_PRIO_DELTA_MAX : c_int = 44;
+pub const _SC_ASYNCHRONOUS_IO : c_int = 45;
+pub const _SC_DELAYTIMER_MAX : c_int = 50;
+pub const _SC_MAPPED_FILES : c_int = 53;
+pub const _SC_MEMLOCK : c_int = 54;
+pub const _SC_MEMLOCK_RANGE : c_int = 55;
+pub const _SC_MEMORY_PROTECTION : c_int = 56;
+pub const _SC_MESSAGE_PASSING : c_int = 57;
+pub const _SC_MQ_OPEN_MAX : c_int = 58;
+pub const _SC_PRIORITIZED_IO : c_int = 60;
+pub const _SC_PRIORITY_SCHEDULING : c_int = 61;
+pub const _SC_REALTIME_SIGNALS : c_int = 64;
+pub const _SC_RTSIG_MAX : c_int = 66;
+pub const _SC_SEMAPHORES : c_int = 67;
+pub const _SC_SHARED_MEMORY_OBJECTS : c_int = 68;
+pub const _SC_SIGQUEUE_MAX : c_int = 70;
+pub const _SC_SYNCHRONIZED_IO : c_int = 75;
+pub const _SC_TIMER_MAX : c_int = 93;
+pub const _SC_TIMERS : c_int = 94;
+
+pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = 0 as *mut _;
+pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = 0 as *mut _;
+pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = 0 as *mut _;
+pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 2;
+pub const SIGSTKSZ: ::size_t = 131072;
+
+extern {
+    pub fn mprotect(addr: *const ::c_void, len: size_t, prot: c_int)
+                    -> c_int;
+    pub fn shm_open(name: *const ::c_char, oflag: ::c_int, mode: ::mode_t)
+                    -> ::c_int;
+    pub fn sysctl(name: *mut c_int,
+                  namelen: c_uint,
+                  oldp: *mut ::c_void,
+                  oldlenp: *mut size_t,
+                  newp: *mut ::c_void,
+                  newlen: size_t)
+                  -> c_int;
+    pub fn sysctlbyname(name: *const c_char,
+                        oldp: *mut ::c_void,
+                        oldlenp: *mut size_t,
+                        newp: *mut ::c_void,
+                        newlen: size_t)
+                        -> c_int;
+    pub fn clock_gettime(clk_id: ::c_int, tp: *mut ::timespec) -> ::c_int;
+    pub fn pthread_set_name_np(tid: ::pthread_t, name: *const ::c_char);
+    pub fn pthread_main_np() -> ::c_uint;
+    pub fn pthread_stackseg_np(thread: pthread_t,
+                               sinfo: *mut stack_t) -> ::c_uint;
+    pub fn __errno() -> *const ::c_int;
+    pub fn backtrace(buf: *mut *mut ::c_void,
+                     sz: ::size_t) -> ::size_t;
+}
+
+cfg_if! {
+    if #[cfg(target_os = "bitrig")] {
+        mod bitrig;
+        use self::bitrig::*;
+    } else {
+        mod openbsd;
+        use self::openbsd::*;
+    }
+}
diff --git a/src/unix/bsd/openbsdlike/openbsd.rs b/src/unix/bsd/openbsdlike/openbsd.rs
new file mode 100644
index 0000000000..417c8a559f
--- /dev/null
+++ b/src/unix/bsd/openbsdlike/openbsd.rs
@@ -0,0 +1,18 @@
+s! {
+    pub struct glob_t {
+        pub gl_pathc:  c_int,
+        __unused1: c_int,
+        pub gl_offs:   c_int,
+        __unused2: c_int,
+        pub gl_pathv:  *mut *mut c_char,
+
+        __unused3: *mut c_void,
+
+        __unused4: *mut c_void,
+        __unused5: *mut c_void,
+        __unused6: *mut c_void,
+        __unused7: *mut c_void,
+        __unused8: *mut c_void,
+        __unused9: *mut c_void,
+    }
+}
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
new file mode 100644
index 0000000000..c78058674d
--- /dev/null
+++ b/src/unix/mod.rs
@@ -0,0 +1,526 @@
+//! Definitions found commonly among almost all Unix derivatives
+//!
+//! More functions and definitions can be found in the more specific modules
+//! according to the platform in question.
+
+pub type pid_t = i32;
+pub type uid_t = u32;
+pub type gid_t = u32;
+pub type in_addr_t = u32;
+pub type in_port_t = u16;
+pub type sighandler_t = ::size_t;
+
+s! {
+    pub struct utimbuf {
+        pub actime: time_t,
+        pub modtime: time_t,
+    }
+
+    pub struct timeval {
+        pub tv_sec: time_t,
+        pub tv_usec: suseconds_t,
+    }
+
+    pub struct timespec {
+        pub tv_sec: time_t,
+        pub tv_nsec: c_long,
+    }
+
+    pub struct rlimit {
+        pub rlim_cur: rlim_t,
+        pub rlim_max: rlim_t,
+    }
+
+    pub struct rusage {
+        pub ru_utime: timeval,
+        pub ru_stime: timeval,
+        pub ru_maxrss: c_long,
+        pub ru_ixrss: c_long,
+        pub ru_idrss: c_long,
+        pub ru_isrss: c_long,
+        pub ru_minflt: c_long,
+        pub ru_majflt: c_long,
+        pub ru_nswap: c_long,
+        pub ru_inblock: c_long,
+        pub ru_oublock: c_long,
+        pub ru_msgsnd: c_long,
+        pub ru_msgrcv: c_long,
+        pub ru_nsignals: c_long,
+        pub ru_nvcsw: c_long,
+        pub ru_nivcsw: c_long,
+
+        #[cfg(target_env = "musl")]
+        __reserved: [c_long; 16],
+    }
+
+    pub struct in_addr {
+        pub s_addr: in_addr_t,
+    }
+
+    pub struct in6_addr {
+        pub s6_addr: [u8; 16],
+        __align: [u32; 0],
+    }
+
+    pub struct ip_mreq {
+        pub imr_multiaddr: in_addr,
+        pub imr_interface: in_addr,
+    }
+
+    pub struct ipv6_mreq {
+        pub ipv6mr_multiaddr: in6_addr,
+        #[cfg(target_os = "android")]
+        pub ipv6mr_interface: ::c_int,
+        #[cfg(not(target_os = "android"))]
+        pub ipv6mr_interface: ::c_uint,
+    }
+}
+
+pub const WNOHANG: ::c_int = 1;
+pub const SIG_DFL: sighandler_t = 0 as sighandler_t;
+pub const SIG_IGN: sighandler_t = 1 as sighandler_t;
+pub const SIG_ERR: sighandler_t = !0 as sighandler_t;
+
+cfg_if! {
+    if #[cfg(feature = "default")] {
+        // cargo build, don't pull in anything extra as the libstd  dep
+        // already pulls in all libs.
+    } else if #[cfg(target_env = "musl")] {
+        #[link(name = "c", kind = "static")]
+        extern {}
+    } else {
+        #[link(name = "c")]
+        #[link(name = "m")]
+        extern {}
+    }
+}
+
+extern {
+    pub fn socket(domain: ::c_int, ty: ::c_int, protocol: ::c_int) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "connect$UNIX2003")]
+    pub fn connect(socket: ::c_int, address: *const sockaddr,
+                   len: socklen_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "bind$UNIX2003")]
+    pub fn bind(socket: ::c_int, address: *const sockaddr,
+                address_len: socklen_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "listen$UNIX2003")]
+    pub fn listen(socket: ::c_int, backlog: ::c_int) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "accept$UNIX2003")]
+    pub fn accept(socket: ::c_int, address: *mut sockaddr,
+                  address_len: *mut socklen_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "getpeername$UNIX2003")]
+    pub fn getpeername(socket: ::c_int, address: *mut sockaddr,
+                       address_len: *mut socklen_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "getsockname$UNIX2003")]
+    pub fn getsockname(socket: ::c_int, address: *mut sockaddr,
+                       address_len: *mut socklen_t) -> ::c_int;
+    pub fn setsockopt(socket: ::c_int, level: ::c_int, name: ::c_int,
+                      value: *const ::c_void,
+                      option_len: socklen_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "sendto$UNIX2003")]
+    pub fn sendto(socket: ::c_int, buf: *const ::c_void, len: ::size_t,
+                  flags: ::c_int, addr: *const sockaddr,
+                  addrlen: socklen_t) -> ::ssize_t;
+    pub fn shutdown(socket: ::c_int, how: ::c_int) -> ::c_int;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "chmod$UNIX2003")]
+    pub fn chmod(path: *const c_char, mode: mode_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "fchmod$UNIX2003")]
+    pub fn fchmod(fd: ::c_int, mode: mode_t) -> ::c_int;
+
+    #[cfg_attr(target_os = "macos", link_name = "fstat$INODE64")]
+    pub fn fstat(fildes: ::c_int, buf: *mut stat) -> ::c_int;
+
+    pub fn mkdir(path: *const c_char, mode: mode_t) -> ::c_int;
+
+    #[cfg_attr(target_os = "macos", link_name = "stat$INODE64")]
+    pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "popen$UNIX2003")]
+    pub fn popen(command: *const c_char,
+                 mode: *const c_char) -> *mut ::FILE;
+    pub fn pclose(stream: *mut ::FILE) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "fdopen$UNIX2003")]
+    pub fn fdopen(fd: ::c_int, mode: *const c_char) -> *mut ::FILE;
+    pub fn fileno(stream: *mut ::FILE) -> ::c_int;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "open$UNIX2003")]
+    pub fn open(path: *const c_char, oflag: ::c_int, ...) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "creat$UNIX2003")]
+    pub fn creat(path: *const c_char, mode: mode_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "fcntl$UNIX2003")]
+    pub fn fcntl(fd: ::c_int, cmd: ::c_int, ...) -> ::c_int;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
+               link_name = "opendir$INODE64")]
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "opendir$INODE64$UNIX2003")]
+    pub fn opendir(dirname: *const c_char) -> *mut ::DIR;
+    #[cfg_attr(target_os = "macos", link_name = "readdir_r$INODE64")]
+    pub fn readdir_r(dirp: *mut ::DIR, entry: *mut ::dirent,
+                      result: *mut *mut ::dirent) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "closedir$UNIX2003")]
+    pub fn closedir(dirp: *mut ::DIR) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
+               link_name = "rewinddir$INODE64")]
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "rewinddir$INODE64$UNIX2003")]
+    pub fn rewinddir(dirp: *mut ::DIR);
+
+    pub fn access(path: *const c_char, amode: ::c_int) -> ::c_int;
+    pub fn alarm(seconds: ::c_uint) -> ::c_uint;
+    pub fn chdir(dir: *const c_char) -> ::c_int;
+    pub fn chown(path: *const c_char, uid: uid_t,
+                 gid: gid_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "close$UNIX2003")]
+    pub fn close(fd: ::c_int) -> ::c_int;
+    pub fn dup(fd: ::c_int) -> ::c_int;
+    pub fn dup2(src: ::c_int, dst: ::c_int) -> ::c_int;
+    pub fn execv(prog: *const c_char,
+                 argv: *const *const c_char) -> ::c_int;
+    pub fn execve(prog: *const c_char, argv: *const *const c_char,
+                  envp: *const *const c_char)
+                  -> ::c_int;
+    pub fn execvp(c: *const c_char,
+                  argv: *const *const c_char) -> ::c_int;
+    pub fn fork() -> pid_t;
+    pub fn fpathconf(filedes: ::c_int, name: ::c_int) -> c_long;
+    pub fn getcwd(buf: *mut c_char, size: ::size_t) -> *mut c_char;
+    pub fn getegid() -> gid_t;
+    pub fn geteuid() -> uid_t;
+    pub fn getgid() -> gid_t;
+    pub fn getgroups(ngroups_max: ::c_int, groups: *mut gid_t)
+                     -> ::c_int;
+    pub fn getlogin() -> *mut c_char;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "getopt$UNIX2003")]
+    pub fn getopt(argc: ::c_int, argv: *const *mut c_char,
+                  optstr: *const c_char) -> ::c_int;
+    pub fn getpgrp() -> pid_t;
+    pub fn getpid() -> pid_t;
+    pub fn getppid() -> pid_t;
+    pub fn getuid() -> uid_t;
+    pub fn isatty(fd: ::c_int) -> ::c_int;
+    pub fn link(src: *const c_char, dst: *const c_char) -> ::c_int;
+    pub fn lseek(fd: ::c_int, offset: off_t, whence: ::c_int)
+                 -> off_t;
+    pub fn pathconf(path: *const c_char, name: ::c_int) -> c_long;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pause$UNIX2003")]
+    pub fn pause() -> ::c_int;
+    pub fn pipe(fds: *mut ::c_int) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "read$UNIX2003")]
+    pub fn read(fd: ::c_int, buf: *mut ::c_void, count: ::size_t)
+                -> ::ssize_t;
+    pub fn rmdir(path: *const c_char) -> ::c_int;
+    pub fn setgid(gid: gid_t) -> ::c_int;
+    pub fn setpgid(pid: pid_t, pgid: pid_t) -> ::c_int;
+    pub fn setsid() -> pid_t;
+    pub fn setuid(uid: uid_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "sleep$UNIX2003")]
+    pub fn sleep(secs: ::c_uint) -> ::c_uint;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "nanosleep$UNIX2003")]
+    pub fn nanosleep(rqtp: *const timespec,
+                     rmtp: *mut timespec) -> ::c_int;
+    pub fn tcgetpgrp(fd: ::c_int) -> pid_t;
+    pub fn ttyname(fd: ::c_int) -> *mut c_char;
+    pub fn unlink(c: *const c_char) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "wait$UNIX2003")]
+    pub fn wait(status: *mut ::c_int) -> pid_t;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "waitpid$UNIX2003")]
+    pub fn waitpid(pid: pid_t, status: *mut ::c_int, options: ::c_int)
+                   -> pid_t;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "write$UNIX2003")]
+    pub fn write(fd: ::c_int, buf: *const ::c_void, count: ::size_t)
+                 -> ::ssize_t;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pread$UNIX2003")]
+    pub fn pread(fd: ::c_int, buf: *mut ::c_void, count: ::size_t,
+                 offset: off_t) -> ::ssize_t;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pwrite$UNIX2003")]
+    pub fn pwrite(fd: ::c_int, buf: *const ::c_void, count: ::size_t,
+                  offset: off_t) -> ::ssize_t;
+    pub fn utime(file: *const c_char, buf: *const utimbuf) -> ::c_int;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+                   link_name = "kill$UNIX2003")]
+    pub fn kill(pid: pid_t, sig: ::c_int) -> ::c_int;
+
+    pub fn mlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
+    pub fn munlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
+    pub fn mlockall(flags: ::c_int) -> ::c_int;
+    pub fn munlockall() -> ::c_int;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "mmap$UNIX2003")]
+    pub fn mmap(addr: *mut ::c_void,
+                len: ::size_t,
+                prot: ::c_int,
+                flags: ::c_int,
+                fd: ::c_int,
+                offset: off_t)
+                -> *mut ::c_void;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "munmap$UNIX2003")]
+    pub fn munmap(addr: *mut ::c_void, len: ::size_t) -> ::c_int;
+
+    pub fn if_nametoindex(ifname: *const c_char) -> ::c_uint;
+
+    #[cfg_attr(target_os = "macos", link_name = "lstat$INODE64")]
+    pub fn lstat(path: *const c_char, buf: *mut stat) -> ::c_int;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "fsync$UNIX2003")]
+    pub fn fsync(fd: ::c_int) -> ::c_int;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "setenv$UNIX2003")]
+    pub fn setenv(name: *const c_char, val: *const c_char,
+                  overwrite: ::c_int) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "unsetenv$UNIX2003")]
+    pub fn unsetenv(name: *const c_char) -> ::c_int;
+
+    pub fn symlink(path1: *const c_char,
+                   path2: *const c_char) -> ::c_int;
+
+    pub fn ftruncate(fd: ::c_int, length: off_t) -> ::c_int;
+
+    #[cfg_attr(target_os = "android", link_name = "bsd_signal")]
+    pub fn signal(signum: ::c_int, handler: sighandler_t) -> sighandler_t;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "getrlimit$UNIX2003")]
+    pub fn getrlimit(resource: ::c_int, rlim: *mut rlimit) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "setrlimit$UNIX2003")]
+    pub fn setrlimit(resource: ::c_int, rlim: *const rlimit) -> ::c_int;
+    pub fn getrusage(resource: ::c_int, usage: *mut rusage) -> ::c_int;
+
+    pub fn getdtablesize() -> ::c_int;
+    #[cfg_attr(any(target_os = "macos", target_os = "ios"),
+               link_name = "realpath$DARWIN_EXTSN")]
+    pub fn realpath(pathname: *const ::c_char, resolved: *mut ::c_char)
+                    -> *mut ::c_char;
+
+    pub fn flock(fd: ::c_int, operation: ::c_int) -> ::c_int;
+
+    pub fn gettimeofday(tp: *mut ::timeval,
+                        tz: *mut ::c_void) -> ::c_int;
+
+    pub fn pthread_self() -> ::pthread_t;
+    pub fn pthread_create(native: *mut ::pthread_t,
+                          attr: *const ::pthread_attr_t,
+                          f: extern fn(*mut ::c_void) -> *mut ::c_void,
+                          value: *mut ::c_void) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pthread_join$UNIX2003")]
+    pub fn pthread_join(native: ::pthread_t,
+                        value: *mut *mut ::c_void) -> ::c_int;
+    pub fn pthread_attr_init(attr: *mut ::pthread_attr_t) -> ::c_int;
+    pub fn pthread_attr_destroy(attr: *mut ::pthread_attr_t) -> ::c_int;
+    pub fn pthread_attr_setstacksize(attr: *mut ::pthread_attr_t,
+                                     stack_size: ::size_t) -> ::c_int;
+    pub fn pthread_attr_setdetachstate(attr: *mut ::pthread_attr_t,
+                                       state: ::c_int) -> ::c_int;
+    pub fn pthread_detach(thread: ::pthread_t) -> ::c_int;
+    pub fn sched_yield() -> ::c_int;
+    pub fn pthread_key_create(key: *mut pthread_key_t,
+                              dtor: ::dox::Option<unsafe extern fn(*mut ::c_void)>)
+                              -> ::c_int;
+    pub fn pthread_key_delete(key: pthread_key_t) -> ::c_int;
+    pub fn pthread_getspecific(key: pthread_key_t) -> *mut ::c_void;
+    pub fn pthread_setspecific(key: pthread_key_t, value: *const ::c_void)
+                               -> ::c_int;
+    pub fn pthread_mutex_init(lock: *mut pthread_mutex_t,
+                              attr: *const pthread_mutexattr_t) -> ::c_int;
+    pub fn pthread_mutex_destroy(lock: *mut pthread_mutex_t) -> ::c_int;
+    pub fn pthread_mutex_lock(lock: *mut pthread_mutex_t) -> ::c_int;
+    pub fn pthread_mutex_trylock(lock: *mut pthread_mutex_t) -> ::c_int;
+    pub fn pthread_mutex_unlock(lock: *mut pthread_mutex_t) -> ::c_int;
+
+    pub fn pthread_mutexattr_init(attr: *mut pthread_mutexattr_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pthread_mutexattr_destroy$UNIX2003")]
+    pub fn pthread_mutexattr_destroy(attr: *mut pthread_mutexattr_t) -> ::c_int;
+    pub fn pthread_mutexattr_settype(attr: *mut pthread_mutexattr_t,
+                                     _type: ::c_int) -> ::c_int;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pthread_cond_wait$UNIX2003")]
+    pub fn pthread_cond_wait(cond: *mut pthread_cond_t,
+                             lock: *mut pthread_mutex_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pthread_cond_timedwait$UNIX2003")]
+    pub fn pthread_cond_timedwait(cond: *mut pthread_cond_t,
+                              lock: *mut pthread_mutex_t,
+                              abstime: *const ::timespec) -> ::c_int;
+    pub fn pthread_cond_signal(cond: *mut pthread_cond_t) -> ::c_int;
+    pub fn pthread_cond_broadcast(cond: *mut pthread_cond_t) -> ::c_int;
+    pub fn pthread_cond_destroy(cond: *mut pthread_cond_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pthread_rwlock_destroy$UNIX2003")]
+    pub fn pthread_rwlock_destroy(lock: *mut pthread_rwlock_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pthread_rwlock_rdlock$UNIX2003")]
+    pub fn pthread_rwlock_rdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pthread_rwlock_tryrdlock$UNIX2003")]
+    pub fn pthread_rwlock_tryrdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pthread_rwlock_wrlock$UNIX2003")]
+    pub fn pthread_rwlock_wrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pthread_rwlock_trywrlock$UNIX2003")]
+    pub fn pthread_rwlock_trywrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pthread_rwlock_unlock$UNIX2003")]
+    pub fn pthread_rwlock_unlock(lock: *mut pthread_rwlock_t) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "pthread_sigmask$UNIX2003")]
+    pub fn pthread_sigmask(how: ::c_int, set: *const sigset_t,
+                           oldset: *mut sigset_t) -> ::c_int;
+
+    // #[cfg_attr(target_os = "linux", link_name = "__xpg_strerror_r")]
+    pub fn strerror_r(errnum: ::c_int, buf: *mut c_char,
+                      buflen: ::size_t) -> ::c_int;
+
+    pub fn getsockopt(sockfd: ::c_int,
+                      level: ::c_int,
+                      optname: ::c_int,
+                      optval: *mut ::c_void,
+                      optlen: *mut ::socklen_t) -> ::c_int;
+    pub fn raise(signum: ::c_int) -> ::c_int;
+    pub fn sigaction(signum: ::c_int,
+                     act: *const sigaction,
+                     oldact: *mut sigaction) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "sigaltstack$UNIX2003")]
+    pub fn sigaltstack(ss: *const stack_t,
+                       oss: *mut stack_t) -> ::c_int;
+
+    pub fn utimes(filename: *const ::c_char,
+                  times: *const ::timeval) -> ::c_int;
+    pub fn gai_strerror(errcode: ::c_int) -> *const ::c_char;
+    pub fn dlopen(filename: *const ::c_char,
+                  flag: ::c_int) -> *mut ::c_void;
+    pub fn dlerror() -> *mut ::c_char;
+    pub fn dlsym(handle: *mut ::c_void,
+                 symbol: *const ::c_char) -> *mut ::c_void;
+    pub fn dlclose(handle: *mut ::c_void) -> ::c_int;
+}
+
+// TODO: get rid of this #[cfg(not(...))]
+#[cfg(not(target_os = "android"))]
+extern {
+    pub fn getifaddrs(ifap: *mut *mut ifaddrs) -> ::c_int;
+    pub fn freeifaddrs(ifa: *mut ifaddrs);
+    #[cfg_attr(target_os = "macos", link_name = "glob$INODE64")]
+    pub fn glob(pattern: *const c_char,
+                flags: ::c_int,
+                errfunc: ::dox::Option<extern "C" fn(epath: *const c_char,
+                                                     errno: ::c_int) -> ::c_int>,
+                pglob: *mut glob_t) -> ::c_int;
+    pub fn globfree(pglob: *mut glob_t);
+
+    pub fn posix_madvise(addr: *mut ::c_void, len: ::size_t, advice: ::c_int)
+                         -> ::c_int;
+
+    pub fn shm_unlink(name: *const c_char) -> ::c_int;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
+               link_name = "seekdir$INODE64")]
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "seekdir$INODE64$UNIX2003")]
+    pub fn seekdir(dirp: *mut ::DIR, loc: c_long);
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
+               link_name = "telldir$INODE64")]
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "telldir$INODE64$UNIX2003")]
+    pub fn telldir(dirp: *mut ::DIR) -> c_long;
+
+    pub fn getsid(pid: pid_t) -> pid_t;
+    pub fn madvise(addr: *mut ::c_void, len: ::size_t, advice: ::c_int)
+                   -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "putenv$UNIX2003")]
+    pub fn putenv(string: *mut c_char) -> ::c_int;
+    pub fn readlink(path: *const c_char,
+                    buf: *mut c_char,
+                    bufsz: ::size_t)
+                    -> ::ssize_t;
+
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "msync$UNIX2003")]
+    pub fn msync(addr: *mut ::c_void, len: ::size_t, flags: ::c_int) -> ::c_int;
+    pub fn sysconf(name: ::c_int) -> c_long;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "usleep$UNIX2003")]
+    pub fn usleep(secs: ::c_uint) -> ::c_int;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "recvfrom$UNIX2003")]
+    pub fn recvfrom(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
+                    flags: ::c_int, addr: *mut sockaddr,
+                    addrlen: *mut socklen_t) -> ::ssize_t;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "send$UNIX2003")]
+    pub fn send(socket: ::c_int, buf: *const ::c_void, len: ::size_t,
+                flags: ::c_int) -> ::ssize_t;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "recv$UNIX2003")]
+    pub fn recv(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
+                flags: ::c_int) -> ::ssize_t;
+    pub fn mkfifo(path: *const c_char, mode: mode_t) -> ::c_int;
+
+    pub fn getpwuid_r(uid: ::uid_t,
+                      pwd: *mut passwd,
+                      buf: *mut ::c_char,
+                      buflen: ::size_t,
+                      result: *mut *mut passwd) -> ::c_int;
+    pub fn posix_memalign(memptr: *mut *mut ::c_void,
+                          align: ::size_t,
+                          size: ::size_t) -> ::c_int;
+    pub fn sigemptyset(set: *mut sigset_t) -> ::c_int;
+}
+
+cfg_if! {
+    if #[cfg(any(target_os = "linux", target_os = "android"))] {
+        mod notbsd;
+        pub use self::notbsd::*;
+    } else if #[cfg(any(target_os = "macos",
+                        target_os = "ios",
+                        target_os = "freebsd",
+                        target_os = "dragonfly",
+                        target_os = "openbsd",
+                        target_os = "netbsd",
+                        target_os = "bitrig"))] {
+        mod bsd;
+        pub use self::bsd::*;
+    } else {
+        // ...
+    }
+}
diff --git a/src/unix/notbsd/android/b32.rs b/src/unix/notbsd/android/b32.rs
new file mode 100644
index 0000000000..8ae2c2e380
--- /dev/null
+++ b/src/unix/notbsd/android/b32.rs
@@ -0,0 +1,8 @@
+s! {
+    pub struct sigaction {
+        pub sa_sigaction: ::sighandler_t,
+        pub sa_mask: ::sigset_t,
+        pub sa_flags: ::c_ulong,
+        pub sa_restorer: ::dox::Option<extern fn()>,
+    }
+}
diff --git a/src/unix/notbsd/android/b64.rs b/src/unix/notbsd/android/b64.rs
new file mode 100644
index 0000000000..45dd78c9cc
--- /dev/null
+++ b/src/unix/notbsd/android/b64.rs
@@ -0,0 +1,8 @@
+s! {
+    pub struct sigaction {
+        pub sa_flags: ::c_uint,
+        pub sa_sigaction: sighandler_t,
+        pub sa_mask: sigset_t,
+        _restorer: *mut ::c_void,
+    }
+}
diff --git a/src/unix/notbsd/android/mod.rs b/src/unix/notbsd/android/mod.rs
new file mode 100644
index 0000000000..e26bceac30
--- /dev/null
+++ b/src/unix/notbsd/android/mod.rs
@@ -0,0 +1,226 @@
+//! Android-specific definitions for linux-like values
+
+pub type c_char = u8;
+pub type c_long = i32;
+pub type c_ulong = u32;
+pub type clock_t = i32;
+pub type time_t = i32;
+pub type suseconds_t = i32;
+pub type wchar_t = u32;
+pub type off_t = i32;
+pub type ino_t = u32;
+pub type blkcnt_t = u32;
+pub type blksize_t = u32;
+pub type dev_t = u32;
+pub type mode_t = u16;
+pub type nlink_t = u16;
+pub type useconds_t = i32;
+pub type socklen_t = i32;
+pub type pthread_t = c_long;
+pub type pthread_mutexattr_t = ::c_long;
+pub type sigset_t = c_ulong;
+
+s! {
+    pub struct stat {
+        pub st_dev: ::c_ulonglong,
+        __pad0: [::c_uchar; 4],
+        __st_ino: ::ino_t,
+        pub st_mode: ::c_uint,
+        pub st_nlink: ::c_uint,
+        pub st_uid: ::c_ulong,
+        pub st_gid: ::c_ulong,
+        pub st_rdev: ::c_ulonglong,
+        __pad3: [::c_uchar; 4],
+        pub st_size: ::c_longlong,
+        pub st_blksize: blksize_t,
+        pub st_blocks: ::c_ulonglong,
+        pub st_atime: ::c_ulong,
+        pub st_atime_nsec: ::c_ulong,
+        pub st_mtime: ::c_ulong,
+        pub st_mtime_nsec: ::c_ulong,
+        pub st_ctime: ::c_ulong,
+        pub st_ctime_nsec: ::c_ulong,
+        pub st_ino: ::c_ulonglong,
+    }
+
+    pub struct pthread_attr_t {
+        pub flags: ::uint32_t,
+        pub stack_base: *mut ::c_void,
+        pub stack_size: ::size_t,
+        pub guard_size: ::size_t,
+        pub sched_policy: ::int32_t,
+        pub sched_priority: ::int32_t,
+    }
+
+    pub struct pthread_mutex_t { value: ::c_int }
+
+    pub struct pthread_cond_t { value: ::c_int }
+
+    pub struct pthread_rwlock_t {
+        lock: pthread_mutex_t,
+        cond: pthread_cond_t,
+        numLocks: ::c_int,
+        writerThreadId: ::c_int,
+        pendingReaders: ::c_int,
+        pendingWriters: ::c_int,
+        reserved: [*mut ::c_void; 4],
+    }
+
+    pub struct passwd {
+        pub pw_name: *mut ::c_char,
+        pub pw_passwd: *mut ::c_char,
+        pub pw_uid: ::uid_t,
+        pub pw_gid: ::gid_t,
+        pub pw_dir: *mut ::c_char,
+        pub pw_shell: *mut ::c_char,
+    }
+
+    pub struct stack_t {
+        pub ss_sp: *mut ::c_void,
+        pub ss_flags: ::c_int,
+        pub ss_size: ::size_t
+    }
+
+    pub struct siginfo_t {
+        pub si_signo: ::c_int,
+        pub si_errno: ::c_int,
+        pub si_code: ::c_int,
+        pub _pad: [::c_int; 29],
+    }
+}
+
+pub const BUFSIZ: ::c_uint = 1024;
+pub const FILENAME_MAX: ::c_uint = 1024;
+pub const FOPEN_MAX: ::c_uint = 20;
+pub const L_tmpnam: ::c_uint = 1024;
+pub const TMP_MAX: ::c_uint = 308915776;
+pub const _PC_NAME_MAX: ::c_int = 4;
+
+pub const FIONBIO: ::c_int = 0x5421;
+
+pub const _SC_ARG_MAX: ::c_int = 0;
+pub const _SC_BC_BASE_MAX: ::c_int = 1;
+pub const _SC_BC_DIM_MAX: ::c_int = 2;
+pub const _SC_BC_SCALE_MAX: ::c_int = 3;
+pub const _SC_BC_STRING_MAX: ::c_int = 4;
+pub const _SC_CHILD_MAX: ::c_int = 5;
+pub const _SC_CLK_TCK: ::c_int = 6;
+pub const _SC_COLL_WEIGHTS_MAX: ::c_int = 7;
+pub const _SC_EXPR_NEST_MAX: ::c_int = 8;
+pub const _SC_LINE_MAX: ::c_int = 9;
+pub const _SC_NGROUPS_MAX: ::c_int = 10;
+pub const _SC_OPEN_MAX: ::c_int = 11;
+pub const _SC_2_C_BIND: ::c_int = 13;
+pub const _SC_2_C_DEV: ::c_int = 14;
+pub const _SC_2_C_VERSION: ::c_int = 15;
+pub const _SC_2_CHAR_TERM: ::c_int = 16;
+pub const _SC_2_FORT_DEV: ::c_int = 17;
+pub const _SC_2_FORT_RUN: ::c_int = 18;
+pub const _SC_2_LOCALEDEF: ::c_int = 19;
+pub const _SC_2_SW_DEV: ::c_int = 20;
+pub const _SC_2_UPE: ::c_int = 21;
+pub const _SC_2_VERSION: ::c_int = 22;
+pub const _SC_JOB_CONTROL: ::c_int = 23;
+pub const _SC_SAVED_IDS: ::c_int = 24;
+pub const _SC_VERSION: ::c_int = 25;
+pub const _SC_RE_DUP_MAX: ::c_int = 26;
+pub const _SC_STREAM_MAX: ::c_int = 27;
+pub const _SC_TZNAME_MAX: ::c_int = 28;
+pub const _SC_XOPEN_CRYPT: ::c_int = 29;
+pub const _SC_XOPEN_ENH_I18N: ::c_int = 30;
+pub const _SC_XOPEN_SHM: ::c_int = 31;
+pub const _SC_XOPEN_VERSION: ::c_int = 32;
+pub const _SC_XOPEN_XCU_VERSION: ::c_int = 33;
+pub const _SC_XOPEN_REALTIME: ::c_int = 34;
+pub const _SC_XOPEN_REALTIME_THREADS: ::c_int = 35;
+pub const _SC_XOPEN_LEGACY: ::c_int = 36;
+pub const _SC_ATEXIT_MAX: ::c_int = 37;
+pub const _SC_IOV_MAX: ::c_int = 38;
+pub const _SC_PAGESIZE: ::c_int = 39;
+pub const _SC_XOPEN_UNIX: ::c_int = 41;
+pub const _SC_MQ_PRIO_MAX: ::c_int = 51;
+pub const _SC_GETGR_R_SIZE_MAX: ::c_int = 71;
+pub const _SC_GETPW_R_SIZE_MAX: ::c_int = 72;
+pub const _SC_LOGIN_NAME_MAX: ::c_int = 73;
+pub const _SC_THREAD_DESTRUCTOR_ITERATIONS: ::c_int = 74;
+pub const _SC_THREAD_KEYS_MAX: ::c_int = 75;
+pub const _SC_THREAD_STACK_MIN: ::c_int = 76;
+pub const _SC_THREAD_THREADS_MAX: ::c_int = 77;
+pub const _SC_TTY_NAME_MAX: ::c_int = 78;
+pub const _SC_THREADS: ::c_int = 79;
+pub const _SC_THREAD_ATTR_STACKADDR: ::c_int = 80;
+pub const _SC_THREAD_ATTR_STACKSIZE: ::c_int = 81;
+pub const _SC_THREAD_PRIORITY_SCHEDULING: ::c_int = 82;
+pub const _SC_THREAD_PRIO_INHERIT: ::c_int = 83;
+pub const _SC_THREAD_PRIO_PROTECT: ::c_int = 84;
+pub const _SC_THREAD_SAFE_FUNCTIONS: ::c_int = 85;
+
+pub const PTHREAD_STACK_MIN: ::size_t = 8192;
+pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = pthread_mutex_t {
+    value: 0,
+};
+pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = pthread_cond_t {
+    value: 0,
+};
+pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = pthread_rwlock_t {
+    lock: PTHREAD_MUTEX_INITIALIZER,
+    cond: PTHREAD_COND_INITIALIZER,
+    numLocks: 0,
+    writerThreadId: 0,
+    pendingReaders: 0,
+    pendingWriters: 0,
+    reserved: [0 as *mut _; 4],
+};
+pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 1;
+
+pub const O_SYNC: ::c_int = 0x1000;
+
+pub const FIOCLEX: ::c_ulong = 0x5451;
+
+pub const SA_ONSTACK: ::c_ulong = 0x08000000;
+pub const SA_SIGINFO: ::c_ulong = 0x00000004;
+
+pub const SIGBUS: ::c_int = 7;
+pub const SIG_SETMASK: ::c_int = 2;
+
+pub const O_ACCMODE: ::c_int = 3;
+
+pub const RUSAGE_CHILDREN: ::c_int = -1;
+
+extern {
+    pub fn madvise(addr: *const ::c_void, len: ::size_t, advice: ::c_int)
+                   -> ::c_int;
+    pub fn ioctl(fd: ::c_int, request: ::c_int, ...) -> ::c_int;
+    pub fn putenv(string: *const ::c_char) -> ::c_int;
+    pub fn readlink(path: *const ::c_char,
+                    buf: *mut ::c_char,
+                    bufsz: ::size_t)
+                    -> ::c_int;
+    pub fn msync(addr: *const ::c_void, len: ::size_t,
+                 flags: ::c_int) -> ::c_int;
+    pub fn mprotect(addr: *const ::c_void, len: ::size_t, prot: ::c_int)
+                    -> ::c_int;
+    pub fn sysconf(name: ::c_int) -> ::c_long;
+    pub fn usleep(secs: ::c_ulong) -> ::c_int;
+    pub fn recvfrom(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
+                    flags: ::c_uint, addr: *const ::sockaddr,
+                    addrlen: *mut ::socklen_t) -> ::ssize_t;
+    pub fn send(socket: ::c_int, buf: *const ::c_void, len: ::size_t,
+                flags: ::c_uint) -> ::ssize_t;
+    pub fn recv(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
+                flags: ::c_uint) -> ::ssize_t;
+}
+
+cfg_if! {
+    if #[cfg(target_pointer_width = "32")] {
+        mod b32;
+        pub use self::b32::*;
+    } else if #[cfg(target_pointer_width = "64")] {
+        mod b64;
+        pub use self::b64::*;
+    } else {
+        // ...
+    }
+}
+
+
diff --git a/src/unix/notbsd/linux/mips.rs b/src/unix/notbsd/linux/mips.rs
new file mode 100644
index 0000000000..607e6a14c4
--- /dev/null
+++ b/src/unix/notbsd/linux/mips.rs
@@ -0,0 +1,212 @@
+pub type c_char = i8;
+pub type c_long = i32;
+pub type c_ulong = u32;
+pub type clock_t = i32;
+pub type time_t = i32;
+pub type suseconds_t = i32;
+pub type wchar_t = i32;
+pub type off_t = i32;
+pub type ino_t = u32;
+pub type blkcnt_t = i32;
+pub type blksize_t = i32;
+pub type nlink_t = u32;
+
+s! {
+    pub struct stat {
+        pub st_dev: ::c_ulong,
+        pub st_pad1: [::c_long; 3],
+        pub st_ino: ::ino_t,
+        pub st_mode: ::mode_t,
+        pub st_nlink: ::nlink_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        pub st_rdev: ::c_ulong,
+        pub st_pad2: [::c_long; 2],
+        pub st_size: ::off_t,
+        pub st_pad3: ::c_long,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        pub st_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt_t,
+        pub st_pad5: [::c_long; 14],
+    }
+
+    pub struct pthread_attr_t {
+        __size: [u32; 9]
+    }
+
+    pub struct sigaction {
+        pub sa_flags: ::c_uint,
+        pub sa_sigaction: ::sighandler_t,
+        pub sa_mask: sigset_t,
+        _restorer: *mut ::c_void,
+        _resv: [::c_int; 1],
+    }
+
+    pub struct stack_t {
+        pub ss_sp: *mut ::c_void,
+        pub ss_size: ::size_t,
+        pub ss_flags: ::c_int,
+    }
+
+    pub struct sigset_t {
+        __val: [::c_ulong; 32],
+    }
+
+    pub struct siginfo_t {
+        pub si_signo: ::c_int,
+        pub si_code: ::c_int,
+        pub si_errno: ::c_int,
+        pub _pad: [::c_int; 29],
+    }
+}
+
+pub const RLIMIT_NOFILE: ::c_int = 5;
+pub const RLIMIT_AS: ::c_int = 6;
+pub const RLIMIT_RSS: ::c_int = 7;
+pub const RLIMIT_NPROC: ::c_int = 8;
+pub const RLIMIT_MEMLOCK: ::c_int = 9;
+pub const RLIMIT_NLIMITS: ::c_int = 15;
+pub const RLIM_INFINITY: ::rlim_t = 0x7fffffff;
+
+pub const O_APPEND: ::c_int = 8;
+pub const O_CREAT: ::c_int = 256;
+pub const O_EXCL: ::c_int = 1024;
+pub const O_NOCTTY: ::c_int = 2048;
+pub const O_NONBLOCK: ::c_int = 128;
+pub const O_SYNC: ::c_int = 0x10;
+pub const O_RSYNC: ::c_int = 0x10;
+pub const O_DSYNC: ::c_int = 0x10;
+
+pub const EDEADLK: ::c_int = 45;
+pub const ENAMETOOLONG: ::c_int = 78;
+pub const ENOLCK: ::c_int = 46;
+pub const ENOSYS: ::c_int = 89;
+pub const ENOTEMPTY: ::c_int = 93;
+pub const ELOOP: ::c_int = 90;
+pub const ENOMSG: ::c_int = 35;
+pub const EIDRM: ::c_int = 36;
+pub const ECHRNG: ::c_int = 37;
+pub const EL2NSYNC: ::c_int = 38;
+pub const EL3HLT: ::c_int = 39;
+pub const EL3RST: ::c_int = 40;
+pub const ELNRNG: ::c_int = 41;
+pub const EUNATCH: ::c_int = 42;
+pub const ENOCSI: ::c_int = 43;
+pub const EL2HLT: ::c_int = 44;
+pub const EBADE: ::c_int = 50;
+pub const EBADR: ::c_int = 51;
+pub const EXFULL: ::c_int = 52;
+pub const ENOANO: ::c_int = 53;
+pub const EBADRQC: ::c_int = 54;
+pub const EBADSLT: ::c_int = 55;
+pub const EDEADLOCK: ::c_int = 56;
+pub const EMULTIHOP: ::c_int = 74;
+pub const EOVERFLOW: ::c_int = 79;
+pub const ENOTUNIQ: ::c_int = 80;
+pub const EBADFD: ::c_int = 81;
+pub const EBADMSG: ::c_int = 77;
+pub const EREMCHG: ::c_int = 82;
+pub const ELIBACC: ::c_int = 83;
+pub const ELIBBAD: ::c_int = 84;
+pub const ELIBSCN: ::c_int = 85;
+pub const ELIBMAX: ::c_int = 86;
+pub const ELIBEXEC: ::c_int = 87;
+pub const EILSEQ: ::c_int = 88;
+pub const ERESTART: ::c_int = 91;
+pub const ESTRPIPE: ::c_int = 92;
+pub const EUSERS: ::c_int = 94;
+pub const ENOTSOCK: ::c_int = 95;
+pub const EDESTADDRREQ: ::c_int = 96;
+pub const EMSGSIZE: ::c_int = 97;
+pub const EPROTOTYPE: ::c_int = 98;
+pub const ENOPROTOOPT: ::c_int = 99;
+pub const EPROTONOSUPPORT: ::c_int = 120;
+pub const ESOCKTNOSUPPORT: ::c_int = 121;
+pub const EOPNOTSUPP: ::c_int = 122;
+pub const EPFNOSUPPORT: ::c_int = 123;
+pub const EAFNOSUPPORT: ::c_int = 124;
+pub const EADDRINUSE: ::c_int = 125;
+pub const EADDRNOTAVAIL: ::c_int = 126;
+pub const ENETDOWN: ::c_int = 127;
+pub const ENETUNREACH: ::c_int = 128;
+pub const ENETRESET: ::c_int = 129;
+pub const ECONNABORTED: ::c_int = 130;
+pub const ECONNRESET: ::c_int = 131;
+pub const ENOBUFS: ::c_int = 132;
+pub const EISCONN: ::c_int = 133;
+pub const ENOTCONN: ::c_int = 134;
+pub const ESHUTDOWN: ::c_int = 143;
+pub const ETOOMANYREFS: ::c_int = 144;
+pub const ETIMEDOUT: ::c_int = 145;
+pub const ECONNREFUSED: ::c_int = 146;
+pub const EHOSTDOWN: ::c_int = 147;
+pub const EHOSTUNREACH: ::c_int = 148;
+pub const EALREADY: ::c_int = 149;
+pub const EINPROGRESS: ::c_int = 150;
+pub const ESTALE: ::c_int = 151;
+pub const EUCLEAN: ::c_int = 135;
+pub const ENOTNAM: ::c_int = 137;
+pub const ENAVAIL: ::c_int = 138;
+pub const EISNAM: ::c_int = 139;
+pub const EREMOTEIO: ::c_int = 140;
+pub const EDQUOT: ::c_int = 1133;
+pub const ENOMEDIUM: ::c_int = 159;
+pub const EMEDIUMTYPE: ::c_int = 160;
+pub const ECANCELED: ::c_int = 158;
+pub const ENOKEY: ::c_int = 161;
+pub const EKEYEXPIRED: ::c_int = 162;
+pub const EKEYREVOKED: ::c_int = 163;
+pub const EKEYREJECTED: ::c_int = 164;
+pub const EOWNERDEAD: ::c_int = 165;
+pub const ENOTRECOVERABLE: ::c_int = 166;
+pub const ERFKILL: ::c_int = 167;
+
+pub const MAP_NORESERVE: ::c_int = 0x400;
+pub const MAP_ANON: ::c_int = 0x800;
+pub const MAP_ANONYMOUS: ::c_int = 0x800;
+pub const MAP_GROWSDOWN: ::c_int = 0x1000;
+pub const MAP_DENYWRITE: ::c_int = 0x2000;
+pub const MAP_EXECUTABLE: ::c_int = 0x4000;
+pub const MAP_LOCKED: ::c_int = 0x8000;
+pub const MAP_POPULATE: ::c_int = 0x10000;
+pub const MAP_NONBLOCK: ::c_int = 0x20000;
+
+pub const SOCK_STREAM: ::c_int = 2;
+pub const SOCK_DGRAM: ::c_int = 1;
+
+pub const SOL_SOCKET: ::c_int = 0xffff;
+
+pub const SO_REUSEADDR: ::c_int = 4;
+pub const SO_TYPE: ::c_int = 4104;
+pub const SO_ERROR: ::c_int = 4103;
+pub const SO_DONTROUTE: ::c_int = 16;
+pub const SO_BROADCAST: ::c_int = 32;
+pub const SO_SNDBUF: ::c_int = 4097;
+pub const SO_RCVBUF: ::c_int = 4098;
+pub const SO_KEEPALIVE: ::c_int = 8;
+pub const SO_OOBINLINE: ::c_int = 256;
+pub const SO_LINGER: ::c_int = 128;
+pub const SO_RCVLOWAT: ::c_int = 4100;
+pub const SO_SNDLOWAT: ::c_int = 4099;
+pub const SO_RCVTIMEO: ::c_int = 4102;
+pub const SO_SNDTIMEO: ::c_int = 4101;
+pub const SO_ACCEPTCONN: ::c_int = 4105;
+
+pub const __SIZEOF_PTHREAD_MUTEX_T: usize = 24;
+pub const __SIZEOF_PTHREAD_RWLOCK_T: usize = 32;
+pub const __SIZEOF_PTHREAD_MUTEXATTR_T: usize = 4;
+
+pub const FIOCLEX: ::c_ulong = 0x6601;
+pub const FIONBIO: ::c_int = 0x667e;
+
+pub const SA_ONSTACK: ::c_ulong = 0x08000000;
+pub const SA_SIGINFO: ::c_ulong = 0x00000008;
+
+pub const SIGBUS: ::c_int = 10;
+
+pub const SIG_SETMASK: ::c_int = 3;
diff --git a/src/unix/notbsd/linux/mod.rs b/src/unix/notbsd/linux/mod.rs
new file mode 100644
index 0000000000..6606b41c9c
--- /dev/null
+++ b/src/unix/notbsd/linux/mod.rs
@@ -0,0 +1,277 @@
+//! Linux-specific definitions for linux-like values
+
+pub type useconds_t = u32;
+pub type dev_t = u64;
+pub type socklen_t = u32;
+pub type pthread_t = c_ulong;
+pub type mode_t = u32;
+
+s! {
+    pub struct glob_t {
+        pub gl_pathc: ::size_t,
+        pub gl_pathv: *mut *mut c_char,
+        pub gl_offs: ::size_t,
+        pub gl_flags: ::c_int,
+
+        __unused1: *mut ::c_void,
+        __unused2: *mut ::c_void,
+        __unused3: *mut ::c_void,
+        __unused4: *mut ::c_void,
+        __unused5: *mut ::c_void,
+    }
+
+    pub struct ifaddrs {
+        pub ifa_next: *mut ifaddrs,
+        pub ifa_name: *mut c_char,
+        pub ifa_flags: ::c_uint,
+        pub ifa_addr: *mut ::sockaddr,
+        pub ifa_netmask: *mut ::sockaddr,
+        pub ifa_ifu: *mut ::sockaddr, // FIXME This should be a union
+        pub ifa_data: *mut ::c_void
+    }
+
+    pub struct pthread_mutex_t {
+        #[cfg(any(target_arch = "mips", target_arch = "mipsel",
+                  target_arch = "arm"))]
+        __align: [::c_long; 0],
+        #[cfg(not(any(target_arch = "mips", target_arch = "mipsel",
+                      target_arch = "arm")))]
+        __align: [::c_longlong; 0],
+        size: [u8; __SIZEOF_PTHREAD_MUTEX_T],
+    }
+
+    pub struct pthread_rwlock_t {
+        #[cfg(any(target_arch = "mips", target_arch = "mipsel",
+                  target_arch = "arm"))]
+        __align: [::c_long; 0],
+        #[cfg(not(any(target_arch = "mips", target_arch = "mipsel",
+                      target_arch = "arm")))]
+        __align: [::c_longlong; 0],
+        size: [u8; __SIZEOF_PTHREAD_RWLOCK_T],
+    }
+
+    pub struct pthread_mutexattr_t {
+        #[cfg(target_arch = "x86_64")]
+        __align: [::c_int; 0],
+        #[cfg(not(target_arch = "x86_64"))]
+        __align: [::c_long; 0],
+        size: [u8; __SIZEOF_PTHREAD_MUTEXATTR_T],
+    }
+
+    pub struct pthread_cond_t {
+        __align: [::c_longlong; 0],
+        size: [u8; __SIZEOF_PTHREAD_COND_T],
+    }
+
+    pub struct passwd {
+        pub pw_name: *mut ::c_char,
+        pub pw_passwd: *mut ::c_char,
+        pub pw_uid: ::uid_t,
+        pub pw_gid: ::gid_t,
+        pub pw_gecos: *mut ::c_char,
+        pub pw_dir: *mut ::c_char,
+        pub pw_shell: *mut ::c_char,
+    }
+}
+
+pub const FILENAME_MAX: ::c_uint = 4096;
+pub const L_tmpnam: ::c_uint = 20;
+pub const _PC_NAME_MAX: ::c_int = 3;
+
+pub const _SC_ARG_MAX: ::c_int = 0;
+pub const _SC_CHILD_MAX: ::c_int = 1;
+pub const _SC_CLK_TCK: ::c_int = 2;
+pub const _SC_NGROUPS_MAX: ::c_int = 3;
+pub const _SC_OPEN_MAX: ::c_int = 4;
+pub const _SC_STREAM_MAX: ::c_int = 5;
+pub const _SC_TZNAME_MAX: ::c_int = 6;
+pub const _SC_JOB_CONTROL: ::c_int = 7;
+pub const _SC_SAVED_IDS: ::c_int = 8;
+pub const _SC_REALTIME_SIGNALS: ::c_int = 9;
+pub const _SC_PRIORITY_SCHEDULING: ::c_int = 10;
+pub const _SC_TIMERS: ::c_int = 11;
+pub const _SC_ASYNCHRONOUS_IO: ::c_int = 12;
+pub const _SC_PRIORITIZED_IO: ::c_int = 13;
+pub const _SC_SYNCHRONIZED_IO: ::c_int = 14;
+pub const _SC_FSYNC: ::c_int = 15;
+pub const _SC_MAPPED_FILES: ::c_int = 16;
+pub const _SC_MEMLOCK: ::c_int = 17;
+pub const _SC_MEMLOCK_RANGE: ::c_int = 18;
+pub const _SC_MEMORY_PROTECTION: ::c_int = 19;
+pub const _SC_MESSAGE_PASSING: ::c_int = 20;
+pub const _SC_SEMAPHORES: ::c_int = 21;
+pub const _SC_SHARED_MEMORY_OBJECTS: ::c_int = 22;
+pub const _SC_AIO_LISTIO_MAX: ::c_int = 23;
+pub const _SC_AIO_MAX: ::c_int = 24;
+pub const _SC_AIO_PRIO_DELTA_MAX: ::c_int = 25;
+pub const _SC_DELAYTIMER_MAX: ::c_int = 26;
+pub const _SC_MQ_OPEN_MAX: ::c_int = 27;
+pub const _SC_MQ_PRIO_MAX: ::c_int = 28;
+pub const _SC_VERSION: ::c_int = 29;
+pub const _SC_PAGESIZE: ::c_int = 30;
+pub const _SC_RTSIG_MAX: ::c_int = 31;
+pub const _SC_SEM_NSEMS_MAX: ::c_int = 32;
+pub const _SC_SEM_VALUE_MAX: ::c_int = 33;
+pub const _SC_SIGQUEUE_MAX: ::c_int = 34;
+pub const _SC_TIMER_MAX: ::c_int = 35;
+pub const _SC_BC_BASE_MAX: ::c_int = 36;
+pub const _SC_BC_DIM_MAX: ::c_int = 37;
+pub const _SC_BC_SCALE_MAX: ::c_int = 38;
+pub const _SC_BC_STRING_MAX: ::c_int = 39;
+pub const _SC_COLL_WEIGHTS_MAX: ::c_int = 40;
+pub const _SC_EXPR_NEST_MAX: ::c_int = 42;
+pub const _SC_LINE_MAX: ::c_int = 43;
+pub const _SC_RE_DUP_MAX: ::c_int = 44;
+pub const _SC_2_VERSION: ::c_int = 46;
+pub const _SC_2_C_BIND: ::c_int = 47;
+pub const _SC_2_C_DEV: ::c_int = 48;
+pub const _SC_2_FORT_DEV: ::c_int = 49;
+pub const _SC_2_FORT_RUN: ::c_int = 50;
+pub const _SC_2_SW_DEV: ::c_int = 51;
+pub const _SC_2_LOCALEDEF: ::c_int = 52;
+pub const _SC_IOV_MAX: ::c_int = 60;
+pub const _SC_THREADS: ::c_int = 67;
+pub const _SC_THREAD_SAFE_FUNCTIONS: ::c_int = 68;
+pub const _SC_GETGR_R_SIZE_MAX: ::c_int = 69;
+pub const _SC_GETPW_R_SIZE_MAX: ::c_int = 70;
+pub const _SC_LOGIN_NAME_MAX: ::c_int = 71;
+pub const _SC_TTY_NAME_MAX: ::c_int = 72;
+pub const _SC_THREAD_DESTRUCTOR_ITERATIONS: ::c_int = 73;
+pub const _SC_THREAD_KEYS_MAX: ::c_int = 74;
+pub const _SC_THREAD_STACK_MIN: ::c_int = 75;
+pub const _SC_THREAD_THREADS_MAX: ::c_int = 76;
+pub const _SC_THREAD_ATTR_STACKADDR: ::c_int = 77;
+pub const _SC_THREAD_ATTR_STACKSIZE: ::c_int = 78;
+pub const _SC_THREAD_PRIORITY_SCHEDULING: ::c_int = 79;
+pub const _SC_THREAD_PRIO_INHERIT: ::c_int = 80;
+pub const _SC_THREAD_PRIO_PROTECT: ::c_int = 81;
+pub const _SC_NPROCESSORS_ONLN: ::c_int = 84;
+pub const _SC_ATEXIT_MAX: ::c_int = 87;
+pub const _SC_XOPEN_VERSION: ::c_int = 89;
+pub const _SC_XOPEN_XCU_VERSION: ::c_int = 90;
+pub const _SC_XOPEN_UNIX: ::c_int = 91;
+pub const _SC_XOPEN_CRYPT: ::c_int = 92;
+pub const _SC_XOPEN_ENH_I18N: ::c_int = 93;
+pub const _SC_XOPEN_SHM: ::c_int = 94;
+pub const _SC_2_CHAR_TERM: ::c_int = 95;
+pub const _SC_2_UPE: ::c_int = 97;
+pub const _SC_XBS5_ILP32_OFF32: ::c_int = 125;
+pub const _SC_XBS5_ILP32_OFFBIG: ::c_int = 126;
+pub const _SC_XBS5_LPBIG_OFFBIG: ::c_int = 128;
+pub const _SC_XOPEN_LEGACY: ::c_int = 129;
+pub const _SC_XOPEN_REALTIME: ::c_int = 130;
+pub const _SC_XOPEN_REALTIME_THREADS: ::c_int = 131;
+
+pub const RLIM_SAVED_MAX: ::rlim_t = RLIM_INFINITY;
+pub const RLIM_SAVED_CUR: ::rlim_t = RLIM_INFINITY;
+
+pub const GLOB_ERR: ::c_int = 1 << 0;
+pub const GLOB_MARK: ::c_int = 1 << 1;
+pub const GLOB_NOSORT: ::c_int = 1 << 2;
+pub const GLOB_DOOFFS: ::c_int = 1 << 3;
+pub const GLOB_NOCHECK: ::c_int = 1 << 4;
+pub const GLOB_APPEND: ::c_int = 1 << 5;
+pub const GLOB_NOESCAPE: ::c_int = 1 << 6;
+
+pub const GLOB_NOSPACE: ::c_int = 1;
+pub const GLOB_ABORTED: ::c_int = 2;
+pub const GLOB_NOMATCH: ::c_int = 3;
+
+pub const POSIX_MADV_NORMAL: ::c_int = 0;
+pub const POSIX_MADV_RANDOM: ::c_int = 1;
+pub const POSIX_MADV_SEQUENTIAL: ::c_int = 2;
+pub const POSIX_MADV_WILLNEED: ::c_int = 3;
+
+pub const S_IEXEC: mode_t = 64;
+pub const S_IWRITE: mode_t = 128;
+pub const S_IREAD: mode_t = 256;
+
+pub const F_LOCK: ::c_int = 1;
+pub const F_TEST: ::c_int = 3;
+pub const F_TLOCK: ::c_int = 2;
+pub const F_ULOCK: ::c_int = 0;
+
+#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+pub const MAP_32BIT: ::c_int = 0x0040;
+
+pub const TCP_MD5SIG: ::c_int = 14;
+
+pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = pthread_mutex_t {
+    __align: [],
+    size: [0; __SIZEOF_PTHREAD_MUTEX_T],
+};
+pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = pthread_cond_t {
+    __align: [],
+    size: [0; __SIZEOF_PTHREAD_COND_T],
+};
+pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = pthread_rwlock_t {
+    __align: [],
+    size: [0; __SIZEOF_PTHREAD_RWLOCK_T],
+};
+pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 1;
+pub const __SIZEOF_PTHREAD_COND_T: usize = 48;
+
+extern {
+    pub fn shm_open(name: *const c_char, oflag: ::c_int,
+                    mode: mode_t) -> ::c_int;
+    pub fn mprotect(addr: *mut ::c_void, len: ::size_t, prot: ::c_int)
+                    -> ::c_int;
+    pub fn __errno_location() -> *mut ::c_int;
+
+}
+
+cfg_if! {
+    if #[cfg(any(target_arch = "arm", target_arch = "x86",
+                 target_arch = "x86_64"))] {
+        pub const PTHREAD_STACK_MIN: ::size_t = 16384;
+    } else {
+        pub const PTHREAD_STACK_MIN: ::size_t = 131072;
+    }
+}
+
+cfg_if! {
+    if #[cfg(target_env = "musl")] {
+        pub const BUFSIZ: ::c_uint = 1024;
+        pub const TMP_MAX: ::c_uint = 10000;
+        pub const FOPEN_MAX: ::c_uint = 1000;
+        pub const POSIX_MADV_DONTNEED: ::c_int = 0;
+        pub const O_ACCMODE: ::c_int = 0o10000003;
+        pub const RUSAGE_CHILDREN: ::c_int = 1;
+
+        extern {
+            pub fn ioctl(fd: ::c_int, request: ::c_int, ...) -> ::c_int;
+        }
+    } else {
+        pub const BUFSIZ: ::c_uint = 8192;
+        pub const TMP_MAX: ::c_uint = 238328;
+        pub const FOPEN_MAX: ::c_uint = 16;
+        pub const POSIX_MADV_DONTNEED: ::c_int = 4;
+        pub const _SC_2_C_VERSION: ::c_int = 96;
+        pub const RUSAGE_THREAD: ::c_int = 1;
+        pub const O_ACCMODE: ::c_int = 3;
+        pub const RUSAGE_CHILDREN: ::c_int = -1;
+
+        extern {
+            pub fn sysctl(name: *mut ::c_int,
+                          namelen: ::c_int,
+                          oldp: *mut ::c_void,
+                          oldlenp: *mut ::size_t,
+                          newp: *mut ::c_void,
+                          newlen: ::size_t)
+                          -> ::c_int;
+            pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
+            pub fn backtrace(buf: *mut *mut ::c_void,
+                             sz: ::c_int) -> ::c_int;
+        }
+    }
+}
+
+cfg_if! {
+    if #[cfg(any(target_arch = "mips", target_arch = "mipsel"))] {
+        mod mips;
+        pub use self::mips::*;
+    } else {
+        mod notmips;
+        pub use self::notmips::*;
+    }
+}
diff --git a/src/unix/notbsd/linux/notmips/b32/arm.rs b/src/unix/notbsd/linux/notmips/b32/arm.rs
new file mode 100644
index 0000000000..1a92e3b4fa
--- /dev/null
+++ b/src/unix/notbsd/linux/notmips/b32/arm.rs
@@ -0,0 +1,2 @@
+pub type c_char = u8;
+pub type wchar_t = u32;
diff --git a/src/unix/notbsd/linux/notmips/b32/mod.rs b/src/unix/notbsd/linux/notmips/b32/mod.rs
new file mode 100644
index 0000000000..4e6024fa6d
--- /dev/null
+++ b/src/unix/notbsd/linux/notmips/b32/mod.rs
@@ -0,0 +1,62 @@
+//! 32-bit specific definitions for linux-like values
+
+pub type c_long = i32;
+pub type c_ulong = u32;
+pub type clock_t = i32;
+pub type time_t = i32;
+pub type suseconds_t = i32;
+pub type ino_t = u32;
+pub type off_t = i32;
+pub type blkcnt_t = i32;
+
+pub type blksize_t = i32;
+pub type nlink_t = u32;
+
+pub const __SIZEOF_PTHREAD_MUTEX_T: usize = 24;
+pub const __SIZEOF_PTHREAD_RWLOCK_T: usize = 32;
+pub const __SIZEOF_PTHREAD_MUTEXATTR_T: usize = 4;
+
+s! {
+    pub struct stat {
+        pub st_dev: ::dev_t,
+        __pad1: ::c_short,
+        pub st_ino: ::ino_t,
+        pub st_mode: ::mode_t,
+        pub st_nlink: ::nlink_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        pub st_rdev: ::dev_t,
+        __pad2: ::c_short,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt_t,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        __unused4: ::c_long,
+        __unused5: ::c_long,
+    }
+
+    pub struct pthread_attr_t {
+        __size: [u32; 9]
+    }
+
+    pub struct sigset_t {
+        __val: [::c_ulong; 32],
+    }
+}
+
+cfg_if! {
+    if #[cfg(target_arch = "x86")] {
+        mod x86;
+        pub use self::x86::*;
+    } else if #[cfg(target_arch = "arm")] {
+        mod arm;
+        pub use self::arm::*;
+    } else {
+        // ...
+    }
+}
diff --git a/src/unix/notbsd/linux/notmips/b32/x86.rs b/src/unix/notbsd/linux/notmips/b32/x86.rs
new file mode 100644
index 0000000000..76ec3ce823
--- /dev/null
+++ b/src/unix/notbsd/linux/notmips/b32/x86.rs
@@ -0,0 +1,2 @@
+pub type c_char = i8;
+pub type wchar_t = i32;
diff --git a/src/unix/notbsd/linux/notmips/b64/aarch64.rs b/src/unix/notbsd/linux/notmips/b64/aarch64.rs
new file mode 100644
index 0000000000..31e8b25f52
--- /dev/null
+++ b/src/unix/notbsd/linux/notmips/b64/aarch64.rs
@@ -0,0 +1,37 @@
+//! AArch64-specific definitions for 64-bit linux-like values
+
+pub type c_char = u8;
+pub type wchar_t = u32;
+pub type nlink_t = u32;
+pub type blksize_t = i32;
+
+pub const __SIZEOF_PTHREAD_MUTEX_T: usize = 48;
+pub const __SIZEOF_PTHREAD_MUTEXATTR_T: usize = 8;
+
+s! {
+    pub struct stat {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino_t,
+        pub st_mode: ::mode_t,
+        pub st_nlink: ::nlink_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        pub st_rdev: ::dev_t,
+        __pad1: ::dev_t,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        __pad2: ::c_int,
+        pub st_blocks: ::blkcnt_t,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        __unused: [::c_int; 2],
+    }
+
+    pub struct pthread_attr_t {
+        __size: [u64; 8]
+    }
+}
diff --git a/src/unix/notbsd/linux/notmips/b64/mod.rs b/src/unix/notbsd/linux/notmips/b64/mod.rs
new file mode 100644
index 0000000000..ce3f3381c0
--- /dev/null
+++ b/src/unix/notbsd/linux/notmips/b64/mod.rs
@@ -0,0 +1,28 @@
+//! 64-bit specific definitions for linux-like values
+
+pub type c_long = i64;
+pub type c_ulong = u64;
+pub type clock_t = i64;
+pub type time_t = i64;
+pub type suseconds_t = i64;
+pub type ino_t = u64;
+pub type off_t = i64;
+pub type blkcnt_t = i64;
+
+s! {
+    pub struct sigset_t {
+        __val: [::c_ulong; 16],
+    }
+}
+
+pub const __SIZEOF_PTHREAD_RWLOCK_T: usize = 56;
+
+cfg_if! {
+    if #[cfg(target_arch = "aarch64")] {
+        mod aarch64;
+        pub use self::aarch64::*;
+    } else {
+        mod x86_64;
+        pub use self::x86_64::*;
+    }
+}
diff --git a/src/unix/notbsd/linux/notmips/b64/x86_64.rs b/src/unix/notbsd/linux/notmips/b64/x86_64.rs
new file mode 100644
index 0000000000..2d3320a20b
--- /dev/null
+++ b/src/unix/notbsd/linux/notmips/b64/x86_64.rs
@@ -0,0 +1,36 @@
+//! x86_64-specific definitions for 64-bit linux-like values
+
+pub type c_char = i8;
+pub type wchar_t = i32;
+pub type nlink_t = u64;
+pub type blksize_t = i64;
+
+pub const __SIZEOF_PTHREAD_MUTEX_T: usize = 40;
+pub const __SIZEOF_PTHREAD_MUTEXATTR_T: usize = 4;
+
+s! {
+    pub struct stat {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino_t,
+        pub st_nlink: ::nlink_t,
+        pub st_mode: ::mode_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        __pad0: ::c_int,
+        pub st_rdev: ::dev_t,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt_t,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        __unused: [::c_long; 3],
+    }
+
+    pub struct pthread_attr_t {
+        __size: [u64; 7]
+    }
+}
diff --git a/src/unix/notbsd/linux/notmips/mod.rs b/src/unix/notbsd/linux/notmips/mod.rs
new file mode 100644
index 0000000000..f69b1ac7f0
--- /dev/null
+++ b/src/unix/notbsd/linux/notmips/mod.rs
@@ -0,0 +1,198 @@
+s! {
+    pub struct sigaction {
+        pub sa_sigaction: ::sighandler_t,
+        pub sa_mask: ::sigset_t,
+        pub sa_flags: ::c_int,
+        _restorer: *mut ::c_void,
+    }
+
+    pub struct stack_t {
+        pub ss_sp: *mut ::c_void,
+        pub ss_flags: ::c_int,
+        pub ss_size: ::size_t
+    }
+
+    pub struct siginfo_t {
+        pub si_signo: ::c_int,
+        pub si_errno: ::c_int,
+        pub si_code: ::c_int,
+        pub _pad: [::c_int; 29],
+        _align: [usize; 0],
+    }
+}
+
+pub const RLIMIT_RSS: ::c_int = 5;
+pub const RLIMIT_NOFILE: ::c_int = 7;
+pub const RLIMIT_AS: ::c_int = 9;
+pub const RLIMIT_NPROC: ::c_int = 6;
+pub const RLIMIT_MEMLOCK: ::c_int = 8;
+pub const RLIM_INFINITY: ::rlim_t = !0;
+
+pub const O_APPEND: ::c_int = 1024;
+pub const O_CREAT: ::c_int = 64;
+pub const O_EXCL: ::c_int = 128;
+pub const O_NOCTTY: ::c_int = 256;
+pub const O_NONBLOCK: ::c_int = 2048;
+pub const O_SYNC: ::c_int = 1052672;
+pub const O_RSYNC: ::c_int = 1052672;
+pub const O_DSYNC: ::c_int = 4096;
+
+pub const MAP_ANON: ::c_int = 0x0020;
+pub const MAP_ANONYMOUS: ::c_int = 0x0020;
+pub const MAP_GROWSDOWN: ::c_int = 0x0100;
+pub const MAP_DENYWRITE: ::c_int = 0x0800;
+pub const MAP_EXECUTABLE: ::c_int = 0x01000;
+pub const MAP_LOCKED: ::c_int = 0x02000;
+pub const MAP_NORESERVE: ::c_int = 0x04000;
+pub const MAP_POPULATE: ::c_int = 0x08000;
+pub const MAP_NONBLOCK: ::c_int = 0x010000;
+pub const MAP_STACK: ::c_int = 0x020000;
+
+pub const EDEADLK: ::c_int = 35;
+pub const ENAMETOOLONG: ::c_int = 36;
+pub const ENOLCK: ::c_int = 37;
+pub const ENOSYS: ::c_int = 38;
+pub const ENOTEMPTY: ::c_int = 39;
+pub const ELOOP: ::c_int = 40;
+pub const ENOMSG: ::c_int = 42;
+pub const EIDRM: ::c_int = 43;
+pub const ECHRNG: ::c_int = 44;
+pub const EL2NSYNC: ::c_int = 45;
+pub const EL3HLT: ::c_int = 46;
+pub const EL3RST: ::c_int = 47;
+pub const ELNRNG: ::c_int = 48;
+pub const EUNATCH: ::c_int = 49;
+pub const ENOCSI: ::c_int = 50;
+pub const EL2HLT: ::c_int = 51;
+pub const EBADE: ::c_int = 52;
+pub const EBADR: ::c_int = 53;
+pub const EXFULL: ::c_int = 54;
+pub const ENOANO: ::c_int = 55;
+pub const EBADRQC: ::c_int = 56;
+pub const EBADSLT: ::c_int = 57;
+pub const EDEADLOCK: ::c_int = EDEADLK;
+pub const EMULTIHOP: ::c_int = 72;
+pub const EOVERFLOW: ::c_int = 75;
+pub const ENOTUNIQ: ::c_int = 76;
+pub const EBADFD: ::c_int = 77;
+pub const EBADMSG: ::c_int = 74;
+pub const EREMCHG: ::c_int = 78;
+pub const ELIBACC: ::c_int = 79;
+pub const ELIBBAD: ::c_int = 80;
+pub const ELIBSCN: ::c_int = 81;
+pub const ELIBMAX: ::c_int = 82;
+pub const ELIBEXEC: ::c_int = 83;
+pub const EILSEQ: ::c_int = 84;
+pub const ERESTART: ::c_int = 85;
+pub const ESTRPIPE: ::c_int = 86;
+pub const EUSERS: ::c_int = 87;
+pub const ENOTSOCK: ::c_int = 88;
+pub const EDESTADDRREQ: ::c_int = 89;
+pub const EMSGSIZE: ::c_int = 90;
+pub const EPROTOTYPE: ::c_int = 91;
+pub const ENOPROTOOPT: ::c_int = 92;
+pub const EPROTONOSUPPORT: ::c_int = 93;
+pub const ESOCKTNOSUPPORT: ::c_int = 94;
+pub const EOPNOTSUPP: ::c_int = 95;
+pub const EPFNOSUPPORT: ::c_int = 96;
+pub const EAFNOSUPPORT: ::c_int = 97;
+pub const EADDRINUSE: ::c_int = 98;
+pub const EADDRNOTAVAIL: ::c_int = 99;
+pub const ENETDOWN: ::c_int = 100;
+pub const ENETUNREACH: ::c_int = 101;
+pub const ENETRESET: ::c_int = 102;
+pub const ECONNABORTED: ::c_int = 103;
+pub const ECONNRESET: ::c_int = 104;
+pub const ENOBUFS: ::c_int = 105;
+pub const EISCONN: ::c_int = 106;
+pub const ENOTCONN: ::c_int = 107;
+pub const ESHUTDOWN: ::c_int = 108;
+pub const ETOOMANYREFS: ::c_int = 109;
+pub const ETIMEDOUT: ::c_int = 110;
+pub const ECONNREFUSED: ::c_int = 111;
+pub const EHOSTDOWN: ::c_int = 112;
+pub const EHOSTUNREACH: ::c_int = 113;
+pub const EALREADY: ::c_int = 114;
+pub const EINPROGRESS: ::c_int = 115;
+pub const ESTALE: ::c_int = 116;
+pub const EUCLEAN: ::c_int = 117;
+pub const ENOTNAM: ::c_int = 118;
+pub const ENAVAIL: ::c_int = 119;
+pub const EISNAM: ::c_int = 120;
+pub const EREMOTEIO: ::c_int = 121;
+pub const EDQUOT: ::c_int = 122;
+pub const ENOMEDIUM: ::c_int = 123;
+pub const EMEDIUMTYPE: ::c_int = 124;
+pub const ECANCELED: ::c_int = 125;
+pub const ENOKEY: ::c_int = 126;
+pub const EKEYEXPIRED: ::c_int = 127;
+pub const EKEYREVOKED: ::c_int = 128;
+pub const EKEYREJECTED: ::c_int = 129;
+pub const EOWNERDEAD: ::c_int = 130;
+pub const ENOTRECOVERABLE: ::c_int = 131;
+pub const EHWPOISON: ::c_int = 133;
+pub const ERFKILL: ::c_int = 132;
+
+pub const SOCK_STREAM: ::c_int = 1;
+pub const SOCK_DGRAM: ::c_int = 2;
+
+pub const SOL_SOCKET: ::c_int = 1;
+
+pub const SO_REUSEADDR: ::c_int = 2;
+pub const SO_TYPE: ::c_int = 3;
+pub const SO_ERROR: ::c_int = 4;
+pub const SO_DONTROUTE: ::c_int = 5;
+pub const SO_BROADCAST: ::c_int = 6;
+pub const SO_SNDBUF: ::c_int = 7;
+pub const SO_RCVBUF: ::c_int = 8;
+pub const SO_KEEPALIVE: ::c_int = 9;
+pub const SO_OOBINLINE: ::c_int = 10;
+pub const SO_LINGER: ::c_int = 13;
+pub const SO_RCVLOWAT: ::c_int = 18;
+pub const SO_SNDLOWAT: ::c_int = 19;
+pub const SO_RCVTIMEO: ::c_int = 20;
+pub const SO_SNDTIMEO: ::c_int = 21;
+pub const SO_ACCEPTCONN: ::c_int = 30;
+
+pub const TCP_THIN_LINEAR_TIMEOUTS: ::c_int = 16;
+pub const TCP_THIN_DUPACK: ::c_int = 17;
+pub const TCP_USER_TIMEOUT: ::c_int = 18;
+pub const TCP_REPAIR: ::c_int = 19;
+pub const TCP_REPAIR_QUEUE: ::c_int = 20;
+pub const TCP_QUEUE_SEQ: ::c_int = 21;
+pub const TCP_REPAIR_OPTIONS: ::c_int = 22;
+pub const TCP_FASTOPEN: ::c_int = 23;
+pub const TCP_TIMESTAMP: ::c_int = 24;
+
+pub const SO_REUSEPORT: ::c_int = 15;
+
+pub const FIOCLEX: ::c_ulong = 0x5451;
+pub const FIONBIO: ::c_int = 0x5421;
+
+pub const SA_ONSTACK: ::c_ulong = 0x08000000;
+pub const SA_SIGINFO: ::c_ulong = 0x00000004;
+
+pub const SIGBUS: ::c_int = 7;
+pub const SIG_SETMASK: ::c_int = 2;
+
+cfg_if! {
+    if #[cfg(target_env = "musl")] {
+        pub const RLIMIT_NLIMITS: ::c_int = 15;
+    } else {
+        pub const RLIMIT_NLIMITS: ::c_int = 16;
+        pub const RLIMIT_RTTIME: ::c_int = 15;
+        pub const TCP_COOKIE_TRANSACTIONS: ::c_int = 15;
+    }
+}
+
+cfg_if! {
+    if #[cfg(any(target_arch = "x86", target_arch = "arm"))] {
+        mod b32;
+        pub use self::b32::*;
+    } else if #[cfg(any(target_arch = "x86_64", target_arch = "aarch64"))] {
+        mod b64;
+        pub use self::b64::*;
+    } else {
+        // ...
+    }
+}
diff --git a/src/unix/notbsd/mod.rs b/src/unix/notbsd/mod.rs
new file mode 100644
index 0000000000..cd7547ccef
--- /dev/null
+++ b/src/unix/notbsd/mod.rs
@@ -0,0 +1,318 @@
+pub type rlim_t = c_ulong;
+pub type sa_family_t = u16;
+pub type pthread_key_t = ::c_uint;
+
+pub enum timezone {}
+
+s! {
+    pub struct sockaddr {
+        pub sa_family: sa_family_t,
+        pub sa_data: [::c_char; 14],
+    }
+
+    pub struct sockaddr_in {
+        pub sin_family: sa_family_t,
+        pub sin_port: ::in_port_t,
+        pub sin_addr: ::in_addr,
+        pub sin_zero: [u8; 8],
+    }
+
+    pub struct sockaddr_in6 {
+        pub sin6_family: sa_family_t,
+        pub sin6_port: ::in_port_t,
+        pub sin6_flowinfo: u32,
+        pub sin6_addr: ::in6_addr,
+        pub sin6_scope_id: u32,
+    }
+
+    pub struct sockaddr_un {
+        pub sun_family: sa_family_t,
+        pub sun_path: [::c_char; 108]
+    }
+
+    pub struct sockaddr_storage {
+        pub ss_family: sa_family_t,
+        __ss_align: ::size_t,
+        #[cfg(target_pointer_width = "32")]
+        __ss_pad2: [u8; 128 - 2 * 4],
+        #[cfg(target_pointer_width = "64")]
+        __ss_pad2: [u8; 128 - 2 * 8],
+    }
+
+    pub struct addrinfo {
+        pub ai_flags: ::c_int,
+        pub ai_family: ::c_int,
+        pub ai_socktype: ::c_int,
+        pub ai_protocol: ::c_int,
+        pub ai_addrlen: socklen_t,
+
+        #[cfg(target_os = "linux")]
+        pub ai_addr: *mut ::sockaddr,
+
+        pub ai_canonname: *mut c_char,
+
+        #[cfg(target_os = "android")]
+        pub ai_addr: *mut ::sockaddr,
+
+        pub ai_next: *mut addrinfo,
+    }
+
+    pub struct sockaddr_ll {
+        pub sll_family: ::c_ushort,
+        pub sll_protocol: ::c_ushort,
+        pub sll_ifindex: ::c_int,
+        pub sll_hatype: ::c_ushort,
+        pub sll_pkttype: ::c_uchar,
+        pub sll_halen: ::c_uchar,
+        pub sll_addr: [::c_uchar; 8]
+    }
+}
+
+pub const EXIT_FAILURE: ::c_int = 1;
+pub const EXIT_SUCCESS: ::c_int = 0;
+pub const RAND_MAX: ::c_int = 2147483647;
+pub const EOF: ::c_int = -1;
+pub const SEEK_SET: ::c_int = 0;
+pub const SEEK_CUR: ::c_int = 1;
+pub const SEEK_END: ::c_int = 2;
+pub const _IOFBF: ::c_int = 0;
+pub const _IONBF: ::c_int = 2;
+pub const _IOLBF: ::c_int = 1;
+
+pub const F_DUPFD: ::c_int = 0;
+pub const F_GETFD: ::c_int = 1;
+pub const F_SETFD: ::c_int = 2;
+pub const F_GETFL: ::c_int = 3;
+pub const F_SETFL: ::c_int = 4;
+
+pub const SIGTRAP: ::c_int = 5;
+
+pub const PTHREAD_CREATE_JOINABLE: ::c_int = 0;
+pub const PTHREAD_CREATE_DETACHED: ::c_int = 1;
+
+pub const CLOCK_REALTIME: ::c_int = 0;
+pub const CLOCK_MONOTONIC: ::c_int = 1;
+
+pub const RLIMIT_CPU: ::c_int = 0;
+pub const RLIMIT_FSIZE: ::c_int = 1;
+pub const RLIMIT_DATA: ::c_int = 2;
+pub const RLIMIT_STACK: ::c_int = 3;
+pub const RLIMIT_CORE: ::c_int = 4;
+pub const RLIMIT_LOCKS: ::c_int = 10;
+pub const RLIMIT_SIGPENDING: ::c_int = 11;
+pub const RLIMIT_MSGQUEUE: ::c_int = 12;
+pub const RLIMIT_NICE: ::c_int = 13;
+pub const RLIMIT_RTPRIO: ::c_int = 14;
+
+pub const RUSAGE_SELF: ::c_int = 0;
+
+pub const O_RDONLY: ::c_int = 0;
+pub const O_WRONLY: ::c_int = 1;
+pub const O_RDWR: ::c_int = 2;
+pub const O_TRUNC: ::c_int = 512;
+pub const S_IFIFO: ::mode_t = 4096;
+pub const S_IFCHR: ::mode_t = 8192;
+pub const S_IFBLK: ::mode_t = 24576;
+pub const S_IFDIR: ::mode_t = 16384;
+pub const S_IFREG: ::mode_t = 32768;
+pub const S_IFLNK: ::mode_t = 40960;
+pub const S_IFSOCK: ::mode_t = 49152;
+pub const S_IFMT: ::mode_t = 61440;
+pub const S_IRWXU: ::mode_t = 448;
+pub const S_IXUSR: ::mode_t = 64;
+pub const S_IWUSR: ::mode_t = 128;
+pub const S_IRUSR: ::mode_t = 256;
+pub const S_IRWXG: ::mode_t = 56;
+pub const S_IXGRP: ::mode_t = 8;
+pub const S_IWGRP: ::mode_t = 16;
+pub const S_IRGRP: ::mode_t = 32;
+pub const S_IRWXO: ::mode_t = 7;
+pub const S_IXOTH: ::mode_t = 1;
+pub const S_IWOTH: ::mode_t = 2;
+pub const S_IROTH: ::mode_t = 4;
+pub const F_OK: ::c_int = 0;
+pub const R_OK: ::c_int = 4;
+pub const W_OK: ::c_int = 2;
+pub const X_OK: ::c_int = 1;
+pub const STDIN_FILENO: ::c_int = 0;
+pub const STDOUT_FILENO: ::c_int = 1;
+pub const STDERR_FILENO: ::c_int = 2;
+pub const SIGHUP: ::c_int = 1;
+pub const SIGINT: ::c_int = 2;
+pub const SIGQUIT: ::c_int = 3;
+pub const SIGILL: ::c_int = 4;
+pub const SIGABRT: ::c_int = 6;
+pub const SIGFPE: ::c_int = 8;
+pub const SIGKILL: ::c_int = 9;
+pub const SIGSEGV: ::c_int = 11;
+pub const SIGPIPE: ::c_int = 13;
+pub const SIGALRM: ::c_int = 14;
+pub const SIGTERM: ::c_int = 15;
+
+pub const PROT_NONE: ::c_int = 0;
+pub const PROT_READ: ::c_int = 1;
+pub const PROT_WRITE: ::c_int = 2;
+pub const PROT_EXEC: ::c_int = 4;
+
+pub const MAP_FILE: ::c_int = 0x0000;
+pub const MAP_SHARED: ::c_int = 0x0001;
+pub const MAP_PRIVATE: ::c_int = 0x0002;
+pub const MAP_FIXED: ::c_int = 0x0010;
+
+pub const MAP_FAILED: *mut ::c_void = !0 as *mut ::c_void;
+
+pub const MCL_CURRENT: ::c_int = 0x0001;
+pub const MCL_FUTURE: ::c_int = 0x0002;
+
+pub const MS_ASYNC: ::c_int = 0x0001;
+pub const MS_INVALIDATE: ::c_int = 0x0002;
+pub const MS_SYNC: ::c_int = 0x0004;
+
+pub const EPERM: ::c_int = 1;
+pub const ENOENT: ::c_int = 2;
+pub const ESRCH: ::c_int = 3;
+pub const EINTR: ::c_int = 4;
+pub const EIO: ::c_int = 5;
+pub const ENXIO: ::c_int = 6;
+pub const E2BIG: ::c_int = 7;
+pub const ENOEXEC: ::c_int = 8;
+pub const EBADF: ::c_int = 9;
+pub const ECHILD: ::c_int = 10;
+pub const EAGAIN: ::c_int = 11;
+pub const ENOMEM: ::c_int = 12;
+pub const EACCES: ::c_int = 13;
+pub const EFAULT: ::c_int = 14;
+pub const ENOTBLK: ::c_int = 15;
+pub const EBUSY: ::c_int = 16;
+pub const EEXIST: ::c_int = 17;
+pub const EXDEV: ::c_int = 18;
+pub const ENODEV: ::c_int = 19;
+pub const ENOTDIR: ::c_int = 20;
+pub const EISDIR: ::c_int = 21;
+pub const EINVAL: ::c_int = 22;
+pub const ENFILE: ::c_int = 23;
+pub const EMFILE: ::c_int = 24;
+pub const ENOTTY: ::c_int = 25;
+pub const ETXTBSY: ::c_int = 26;
+pub const EFBIG: ::c_int = 27;
+pub const ENOSPC: ::c_int = 28;
+pub const ESPIPE: ::c_int = 29;
+pub const EROFS: ::c_int = 30;
+pub const EMLINK: ::c_int = 31;
+pub const EPIPE: ::c_int = 32;
+pub const EDOM: ::c_int = 33;
+pub const ERANGE: ::c_int = 34;
+pub const EWOULDBLOCK: ::c_int = EAGAIN;
+
+pub const EBFONT: ::c_int = 59;
+pub const ENOSTR: ::c_int = 60;
+pub const ENODATA: ::c_int = 61;
+pub const ETIME: ::c_int = 62;
+pub const ENOSR: ::c_int = 63;
+pub const ENONET: ::c_int = 64;
+pub const ENOPKG: ::c_int = 65;
+pub const EREMOTE: ::c_int = 66;
+pub const ENOLINK: ::c_int = 67;
+pub const EADV: ::c_int = 68;
+pub const ESRMNT: ::c_int = 69;
+pub const ECOMM: ::c_int = 70;
+pub const EPROTO: ::c_int = 71;
+pub const EDOTDOT: ::c_int = 73;
+
+pub const AF_PACKET: ::c_int = 17;
+pub const IPPROTO_RAW: ::c_int = 255;
+
+pub const PROT_GROWSDOWN: ::c_int = 0x1000000;
+pub const PROT_GROWSUP: ::c_int = 0x2000000;
+
+pub const MAP_TYPE: ::c_int = 0x000f;
+
+pub const MADV_NORMAL: ::c_int = 0;
+pub const MADV_RANDOM: ::c_int = 1;
+pub const MADV_SEQUENTIAL: ::c_int = 2;
+pub const MADV_WILLNEED: ::c_int = 3;
+pub const MADV_DONTNEED: ::c_int = 4;
+pub const MADV_REMOVE: ::c_int = 9;
+pub const MADV_DONTFORK: ::c_int = 10;
+pub const MADV_DOFORK: ::c_int = 11;
+pub const MADV_MERGEABLE: ::c_int = 12;
+pub const MADV_UNMERGEABLE: ::c_int = 13;
+pub const MADV_HWPOISON: ::c_int = 100;
+
+pub const IFF_LOOPBACK: ::c_int = 0x8;
+
+pub const AF_UNIX: ::c_int = 1;
+pub const AF_INET: ::c_int = 2;
+pub const AF_INET6: ::c_int = 10;
+pub const SOCK_RAW: ::c_int = 3;
+pub const IPPROTO_TCP: ::c_int = 6;
+pub const IPPROTO_IP: ::c_int = 0;
+pub const IPPROTO_IPV6: ::c_int = 41;
+pub const IP_MULTICAST_TTL: ::c_int = 33;
+pub const IP_MULTICAST_LOOP: ::c_int = 34;
+pub const IP_TTL: ::c_int = 2;
+pub const IP_HDRINCL: ::c_int = 3;
+pub const IP_ADD_MEMBERSHIP: ::c_int = 35;
+pub const IP_DROP_MEMBERSHIP: ::c_int = 36;
+pub const IPV6_ADD_MEMBERSHIP: ::c_int = 20;
+pub const IPV6_DROP_MEMBERSHIP: ::c_int = 21;
+
+pub const TCP_NODELAY: ::c_int = 1;
+pub const TCP_MAXSEG: ::c_int = 2;
+pub const TCP_CORK: ::c_int = 3;
+pub const TCP_KEEPIDLE: ::c_int = 4;
+pub const TCP_KEEPINTVL: ::c_int = 5;
+pub const TCP_KEEPCNT: ::c_int = 6;
+pub const TCP_SYNCNT: ::c_int = 7;
+pub const TCP_LINGER2: ::c_int = 8;
+pub const TCP_DEFER_ACCEPT: ::c_int = 9;
+pub const TCP_WINDOW_CLAMP: ::c_int = 10;
+pub const TCP_INFO: ::c_int = 11;
+pub const TCP_QUICKACK: ::c_int = 12;
+pub const TCP_CONGESTION: ::c_int = 13;
+
+pub const IPV6_MULTICAST_LOOP: ::c_int = 19;
+pub const IPV6_V6ONLY: ::c_int = 26;
+
+pub const SO_DEBUG: ::c_int = 1;
+
+pub const SHUT_RD: ::c_int = 0;
+pub const SHUT_WR: ::c_int = 1;
+pub const SHUT_RDWR: ::c_int = 2;
+
+pub const LOCK_SH: ::c_int = 1;
+pub const LOCK_EX: ::c_int = 2;
+pub const LOCK_NB: ::c_int = 4;
+pub const LOCK_UN: ::c_int = 8;
+
+pub const SIGSTKSZ: ::size_t = 8192;
+
+extern {
+    pub fn fdatasync(fd: ::c_int) -> ::c_int;
+    pub fn mincore(addr: *mut ::c_void, len: ::size_t,
+                   vec: *mut ::c_uchar) -> ::c_int;
+    pub fn clock_gettime(clk_id: ::c_int, tp: *mut ::timespec) -> ::c_int;
+    pub fn prctl(option: ::c_int, ...) -> ::c_int;
+    pub fn pthread_getattr_np(native: ::pthread_t,
+                              attr: *mut ::pthread_attr_t) -> ::c_int;
+    pub fn pthread_attr_getguardsize(attr: *const ::pthread_attr_t,
+                                     guardsize: *mut ::size_t) -> ::c_int;
+    pub fn pthread_attr_getstack(attr: *const ::pthread_attr_t,
+                                 stackaddr: *mut *mut ::c_void,
+                                 stacksize: *mut ::size_t) -> ::c_int;
+    pub fn memalign(align: ::size_t, size: ::size_t) -> *mut ::c_void;
+    pub fn setgroups(ngroups: ::size_t,
+                     ptr: *const ::gid_t) -> ::c_int;
+}
+
+cfg_if! {
+    if #[cfg(target_os = "linux")] {
+        mod linux;
+        pub use self::linux::*;
+    } else if #[cfg(target_os = "android")] {
+        mod android;
+        pub use self::android::*;
+    } else {
+        // ...
+    }
+}
diff --git a/src/windows.rs b/src/windows.rs
new file mode 100644
index 0000000000..a4783cb081
--- /dev/null
+++ b/src/windows.rs
@@ -0,0 +1,178 @@
+//! Windows CRT definitions
+
+pub type c_char = i8;
+pub type c_long = i32;
+pub type c_ulong = u32;
+pub type wchar_t = u16;
+
+pub type clock_t = i32;
+
+cfg_if! {
+    if #[cfg(all(target_arch = "x86", target_env = "gnu"))] {
+        pub type time_t = i32;
+    } else {
+        pub type time_t = i64;
+    }
+}
+
+pub type off_t = i32;
+pub type dev_t = u32;
+pub type ino_t = u16;
+pub enum timezone {}
+pub type time64_t = i64;
+
+s! {
+    // note this is the struct called stat64 in Windows. Not stat, nor stati64.
+    pub struct stat {
+        pub st_dev: dev_t,
+        pub st_ino: ino_t,
+        pub st_mode: u16,
+        pub st_nlink: ::c_short,
+        pub st_uid: ::c_short,
+        pub st_gid: ::c_short,
+        pub st_rdev: dev_t,
+        pub st_size: i64,
+        pub st_atime: time64_t,
+        pub st_mtime: time64_t,
+        pub st_ctime: time64_t,
+    }
+
+    // note that this is called utimbuf64 in Windows
+    pub struct utimbuf {
+        pub actime: time64_t,
+        pub modtime: time64_t,
+    }
+
+    pub struct timeval {
+        pub tv_sec: c_long,
+        pub tv_usec: c_long,
+    }
+
+    pub struct timespec {
+        pub tv_sec: time_t,
+        pub tv_nsec: c_long,
+    }
+}
+
+pub const EXIT_FAILURE: ::c_int = 1;
+pub const EXIT_SUCCESS: ::c_int = 0;
+pub const RAND_MAX: ::c_int = 32767;
+pub const EOF: ::c_int = -1;
+pub const SEEK_SET: ::c_int = 0;
+pub const SEEK_CUR: ::c_int = 1;
+pub const SEEK_END: ::c_int = 2;
+pub const _IOFBF: ::c_int = 0;
+pub const _IONBF: ::c_int = 4;
+pub const _IOLBF: ::c_int = 64;
+pub const BUFSIZ: ::c_uint = 512;
+pub const FOPEN_MAX: ::c_uint = 20;
+pub const FILENAME_MAX: ::c_uint = 260;
+
+cfg_if! {
+    if #[cfg(all(target_env = "gnu"))] {
+        pub const L_tmpnam: ::c_uint = 14;
+        pub const TMP_MAX: ::c_uint = 0x7fff;
+    } else {
+        pub const L_tmpnam: ::c_uint = 260;
+        pub const TMP_MAX: ::c_uint = 0x7fff_ffff;
+    }
+}
+
+pub const O_RDONLY: ::c_int = 0;
+pub const O_WRONLY: ::c_int = 1;
+pub const O_RDWR: ::c_int = 2;
+pub const O_APPEND: ::c_int = 8;
+pub const O_CREAT: ::c_int = 256;
+pub const O_EXCL: ::c_int = 1024;
+pub const O_TEXT: ::c_int = 16384;
+pub const O_BINARY: ::c_int = 32768;
+pub const O_NOINHERIT: ::c_int = 128;
+pub const O_TRUNC: ::c_int = 512;
+pub const S_IFCHR: ::c_int = 8192;
+pub const S_IFDIR: ::c_int = 16384;
+pub const S_IFREG: ::c_int = 32768;
+pub const S_IFMT: ::c_int = 61440;
+pub const S_IEXEC: ::c_int = 64;
+pub const S_IWRITE: ::c_int = 128;
+pub const S_IREAD: ::c_int = 256;
+
+#[cfg(target_env = "msvc")]
+#[link(name = "msvcrt")]
+extern {}
+
+extern {
+    #[link_name = "_chmod"]
+    pub fn chmod(path: *const c_char, mode: ::c_int) -> ::c_int;
+    #[link_name = "_wchmod"]
+    pub fn wchmod(path: *const wchar_t, mode: ::c_int) -> ::c_int;
+    #[link_name = "_mkdir"]
+    pub fn mkdir(path: *const c_char) -> ::c_int;
+    #[link_name = "_wrmdir"]
+    pub fn wrmdir(path: *const wchar_t) -> ::c_int;
+    #[link_name = "_fstat64"]
+    pub fn fstat(fildes: ::c_int, buf: *mut stat) -> ::c_int;
+    #[link_name = "_stat64"]
+    pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;
+    #[link_name = "_wstat64"]
+    pub fn wstat(path: *const wchar_t, buf: *mut stat) -> ::c_int;
+    #[link_name = "_wutime64"]
+    pub fn wutime(file: *const wchar_t, buf: *mut utimbuf) -> ::c_int;
+    #[link_name = "_popen"]
+    pub fn popen(command: *const c_char, mode: *const c_char) -> *mut ::FILE;
+    #[link_name = "_pclose"]
+    pub fn pclose(stream: *mut ::FILE) -> ::c_int;
+    #[link_name = "_fdopen"]
+    pub fn fdopen(fd: ::c_int, mode: *const c_char) -> *mut ::FILE;
+    #[link_name = "_fileno"]
+    pub fn fileno(stream: *mut ::FILE) -> ::c_int;
+    #[link_name = "_open"]
+    pub fn open(path: *const c_char, oflag: ::c_int, ...) -> ::c_int;
+    #[link_name = "_wopen"]
+    pub fn wopen(path: *const wchar_t, oflag: ::c_int, ...) -> ::c_int;
+    #[link_name = "_creat"]
+    pub fn creat(path: *const c_char, mode: ::c_int) -> ::c_int;
+    #[link_name = "_access"]
+    pub fn access(path: *const c_char, amode: ::c_int) -> ::c_int;
+    #[link_name = "_chdir"]
+    pub fn chdir(dir: *const c_char) -> ::c_int;
+    #[link_name = "_close"]
+    pub fn close(fd: ::c_int) -> ::c_int;
+    #[link_name = "_dup"]
+    pub fn dup(fd: ::c_int) -> ::c_int;
+    #[link_name = "_dup2"]
+    pub fn dup2(src: ::c_int, dst: ::c_int) -> ::c_int;
+    #[link_name = "_execv"]
+    pub fn execv(prog: *const c_char, argv: *const *const c_char) -> ::intptr_t;
+    #[link_name = "_execve"]
+    pub fn execve(prog: *const c_char, argv: *const *const c_char,
+                  envp: *const *const c_char) -> ::c_int;
+    #[link_name = "_execvp"]
+    pub fn execvp(c: *const c_char, argv: *const *const c_char) -> ::c_int;
+    #[link_name = "_execvpe"]
+    pub fn execvpe(c: *const c_char, argv: *const *const c_char,
+                   envp: *const *const c_char) -> ::c_int;
+    #[link_name = "_getcwd"]
+    pub fn getcwd(buf: *mut c_char, size: ::c_int) -> *mut c_char;
+    #[link_name = "_getpid"]
+    pub fn getpid() -> ::c_int;
+    #[link_name = "_isatty"]
+    pub fn isatty(fd: ::c_int) -> ::c_int;
+    #[link_name = "_lseek"]
+    pub fn lseek(fd: ::c_int, offset: c_long, origin: ::c_int) -> c_long;
+    #[link_name = "_pipe"]
+    pub fn pipe(fds: *mut ::c_int, psize: ::c_uint, textmode: ::c_int) -> ::c_int;
+    #[link_name = "_read"]
+    pub fn read(fd: ::c_int, buf: *mut ::c_void, count: ::c_uint) -> ::c_int;
+    #[link_name = "_rmdir"]
+    pub fn rmdir(path: *const c_char) -> ::c_int;
+    #[link_name = "_unlink"]
+    pub fn unlink(c: *const c_char) -> ::c_int;
+    #[link_name = "_write"]
+    pub fn write(fd: ::c_int, buf: *const ::c_void, count: ::c_uint) -> ::c_int;
+    #[link_name = "_commit"]
+    pub fn commit(fd: ::c_int) -> ::c_int;
+    #[link_name = "_get_osfhandle"]
+    pub fn get_osfhandle(fd: ::c_int) -> ::intptr_t;
+    #[link_name = "_open_osfhandle"]
+    pub fn open_osfhandle(osfhandle: ::intptr_t, flags: ::c_int) -> ::c_int;
+}