Import subrepo libc/:libc at 05a2d197356ef253dfd985166576619ac9b6947f

30 files changed, 1225 insertions, 0 deletions

diff --git a/libc/ci/README.md b/libc/ci/README.md
new file mode 100644
index 0000000..13c7c8d
--- /dev/null
+++ b/libc/ci/README.md
@@ -0,0 +1,203 @@
+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:
+
+* `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.
+
+* `run-qemu.sh` - see discussion about QEMU below
+
+* `mips`, `rumprun` - instructions to build the docker image for each respective
+  CI target
+
+# 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}`
+  * `x86_64-rumprun-netbsd`
+  * `x86_64-unknown-freebsd`
+  * `x86_64-unknown-openbsd`
+
+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 the QEMU userspace emulator 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.
+* The rumprun target builds an entire kernel from the test suite and then runs
+  it inside QEMU using the serial console to test whether it succeeded or
+  failed.
+* The BSD builds, currently OpenBSD and FreeBSD, use QEMU to boot up a system
+  and compile/run tests. More information on that below.
+
+[android-docker]: https://github.com/rust-lang/rust-buildbot/blob/master/slaves/android/Dockerfile
+
+## QEMU
+
+Lots of the architectures tested here use QEMU in the tests, so it's worth going
+over all the crazy capabilities QEMU has and the various flavors in which we use
+it!
+
+First up, QEMU has userspace emulation where it doesn't boot a full kernel, it
+just runs a binary from another architecture (using the `qemu-<arch>` wrappers).
+We provide it the runtime path for the dynamically loaded system libraries,
+however. This strategy is used for all Linux architectures that aren't intel.
+Note that one downside of this QEMU system is that threads are barely
+implemented, so we're careful to not spawn many threads.
+
+For the rumprun target the only output is a kernel image, so we just use that
+plus the `rumpbake` command to create a full kernel image which is then run from
+within QEMU.
+
+Finally, the fun part, the BSDs. Quite a few hoops are jumped through to get CI
+working for these platforms, but the gist of it looks like:
+
+* Cross compiling from Linux to any of the BSDs seems to be quite non-standard.
+  We may be able to get it working but it might be difficult at that point to
+  ensure that the libc definitions align with what you'd get on the BSD itself.
+  As a result, we try to do compiles within the BSD distro.
+* On Travis we can't run a VM-in-a-VM, so we resort to userspace emulation
+  (QEMU).
+* Unfortunately on Travis we also can't use KVM, so the emulation is super slow.
+
+With all that in mind, the way BSD is tested looks like:
+
+1. Download a pre-prepared image for the OS being tested.
+2. Generate the tests for the OS being tested. This involves running the `ctest`
+   library over libc to generate a Rust file and a C file which will then be
+   compiled into the final test.
+3. Generate a disk image which will later be mounted by the OS being tested.
+   This image is mostly just the libc directory, but some modifications are made
+   to compile the generated files from step 2.
+4. The kernel is booted in QEMU, and it is configured to detect the libc-test
+   image being available, run the test script, and then shut down afterwards.
+5. Look for whether the tests passed in the serial console output of the kernel.
+
+There's some pretty specific instructions for setting up each image (detailed
+below), but the main gist of this is that we must avoid a vanilla `cargo run`
+inside of the `libc-test` directory (which is what it's intended for) because
+that would compile `syntex_syntax`, a large library, with userspace emulation.
+This invariably times out on Travis, so we can't do that.
+
+Once all those hoops are jumped through, however, we can be happy that we're
+testing almost everything!
+
+Below are some details of how to set up the initial OS images which are
+downloaded. Each image must be enabled have input/output over the serial
+console, log in automatically at the serial console, detect if a second drive in
+QEMU is available, and if so mount it, run a script (it'll specifically be
+`run-qemu.sh` in this folder which is copied into the generated image talked
+about above), and then shut down.
+
+### QEMU setup - FreeBSD
+
+1. Download CD installer (most minimal is fine)
+2. `qemu-img create -f qcow2 foo.qcow2 2G`
+3. `qemu -cdrom foo.iso -drive if=virtio,file=foo.qcow2 -net nic,model=virtio -net user`
+4. run installer
+5. `echo 'console="comconsole"' >> /boot/loader.conf`
+6. `echo 'autoboot_delay="0"' >> /boot/loader.conf`
+7. look at /etc/ttys, see what getty argument is for ttyu0
+8. edit /etc/gettytab, look for ttyu0 argument, prepend `:al=root` to line
+   beneath
+
+(note that the current image has a `freebsd` user, but this isn't really
+necessary)
+
+Once that's done, arrange for this script to run at login:
+
+```
+#!/bin/sh
+
+sudo kldload ext2fs
+[ -e /dev/vtbd1 ] || exit 0
+sudo mount -t ext2fs /dev/vtbd1 /mnt
+sh /mnt/run.sh /mnt
+sudo poweroff
+```
+
+Helpful links
+
+* https://en.wikibooks.org/wiki/QEMU/Images
+* https://blog.nekoconeko.nl/blog/2015/06/04/creating-an-openstack-freebsd-image.html
+* https://www.freebsd.org/doc/handbook/serialconsole-setup.html
+
+
+### QEMU setup - OpenBSD
+
+1. Download CD installer
+2. `qemu-img create -f qcow2 foo.qcow2 2G`
+3. `qemu -cdrom foo.iso -drive if=virtio,file=foo.qcow2 -net nic,model=virtio -net user`
+4. run installer
+5. `echo 'set tty com0' >> /etc/boot.conf`
+6. `echo 'boot' >> /etc/boot.conf`
+7. Modify /etc/ttys, change the `tty00` at the end from 'unknown off' to
+   'vt220 on secure'
+8. Modify same line in /etc/ttys to have `"/root/foo.sh"` as the shell
+9. Add this script to `/root/foo.sh`
+
+```
+#!/bin/sh
+exec 1>/dev/tty00
+exec 2>&1
+
+if mount -t ext2fs /dev/sd1c /mnt; then
+  sh /mnt/run.sh /mnt
+  shutdown -ph now
+fi
+
+# limited shell...
+exec /bin/sh < /dev/tty00
+```
+
+10. `chmod +x /root/foo.sh`
+
+Helpful links:
+
+* https://en.wikibooks.org/wiki/QEMU/Images
+* http://www.openbsd.org/faq/faq7.html#SerCon
+
+# Questions?
+
+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/libc/ci/android-accept-licenses.sh b/libc/ci/android-accept-licenses.sh
new file mode 100755
index 0000000..8d8f60a
--- /dev/null
+++ b/libc/ci/android-accept-licenses.sh
@@ -0,0 +1,15 @@
+#!/usr/bin/expect -f
+# ignore-license
+
+set timeout 1800
+set cmd [lindex $argv 0]
+set licenses [lindex $argv 1]
+
+spawn {*}$cmd
+expect {
+  "Do you accept the license '*'*" {
+        exp_send "y\r"
+        exp_continue
+  }
+  eof
+}
diff --git a/libc/ci/android-install-ndk.sh b/libc/ci/android-install-ndk.sh
new file mode 100644
index 0000000..75bcd20
--- /dev/null
+++ b/libc/ci/android-install-ndk.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+# Copyright 2016 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.
+
+set -ex
+
+curl -O https://dl.google.com/android/repository/android-ndk-r13b-linux-x86_64.zip
+unzip -q android-ndk-r13b-linux-x86_64.zip
+
+case "$1" in
+  aarch64)
+    arch=arm64
+    ;;
+
+  i686)
+    arch=x86
+    ;;
+
+  *)
+    arch=$1
+    ;;
+esac;
+
+android-ndk-r13b/build/tools/make_standalone_toolchain.py \
+        --install-dir /android/ndk-$1 \
+        --arch $arch \
+        --api 24
+
+rm -rf ./android-ndk-r13b-linux-x86_64.zip ./android-ndk-r13b
diff --git a/libc/ci/android-install-sdk.sh b/libc/ci/android-install-sdk.sh
new file mode 100644
index 0000000..0762dcb
--- /dev/null
+++ b/libc/ci/android-install-sdk.sh
@@ -0,0 +1,53 @@
+#!/bin/sh
+# Copyright 2016 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.
+
+set -ex
+
+# Prep the SDK and emulator
+#
+# Note that the update process requires that we accept a bunch of licenses, and
+# we can't just pipe `yes` into it for some reason, so we take the same strategy
+# located in https://github.com/appunite/docker by just wrapping it in a script
+# which apparently magically accepts the licenses.
+
+mkdir sdk
+curl https://dl.google.com/android/repository/tools_r25.2.5-linux.zip -O
+unzip -d sdk tools_r25.2.5-linux.zip
+
+filter="platform-tools,android-24"
+
+case "$1" in
+  arm | armv7)
+    abi=armeabi-v7a
+    ;;
+
+  aarch64)
+    abi=arm64-v8a
+    ;;
+
+  i686)
+    abi=x86
+    ;;
+
+  *)
+    echo "invalid arch: $1"
+    exit 1
+    ;;
+esac;
+
+filter="$filter,sys-img-$abi-android-24"
+
+./android-accept-licenses.sh "android - update sdk -a --no-ui --filter $filter"
+
+echo "no" | android create avd \
+                --name $1 \
+                --target android-24 \
+                --abi $abi
diff --git a/libc/ci/docker/aarch64-linux-android/Dockerfile b/libc/ci/docker/aarch64-linux-android/Dockerfile
new file mode 100644
index 0000000..7ad8492
--- /dev/null
+++ b/libc/ci/docker/aarch64-linux-android/Dockerfile
@@ -0,0 +1,32 @@
+FROM ubuntu:16.04
+
+RUN dpkg --add-architecture i386 && \
+    apt-get update && \
+    apt-get install -y --no-install-recommends \
+  file \
+  curl \
+  ca-certificates \
+  python \
+  unzip \
+  expect \
+  openjdk-9-jre \
+  libstdc++6:i386 \
+  libpulse0 \
+  gcc \
+  libc6-dev
+
+WORKDIR /android/
+COPY android* /android/
+
+ENV ANDROID_ARCH=aarch64
+ENV PATH=$PATH:/android/ndk-$ANDROID_ARCH/bin:/android/sdk/tools:/android/sdk/platform-tools
+
+RUN sh /android/android-install-ndk.sh $ANDROID_ARCH
+RUN sh /android/android-install-sdk.sh $ANDROID_ARCH
+RUN mv /root/.android /tmp
+RUN chmod 777 -R /tmp/.android
+RUN chmod 755 /android/sdk/tools/* /android/sdk/tools/qemu/linux-x86_64/*
+
+ENV PATH=$PATH:/rust/bin \
+    CARGO_TARGET_AARCH64_LINUX_ANDROID_LINKER=aarch64-linux-android-gcc \
+    HOME=/tmp
diff --git a/libc/ci/docker/aarch64-unknown-linux-gnu/Dockerfile b/libc/ci/docker/aarch64-unknown-linux-gnu/Dockerfile
new file mode 100644
index 0000000..2ba69e1
--- /dev/null
+++ b/libc/ci/docker/aarch64-unknown-linux-gnu/Dockerfile
@@ -0,0 +1,7 @@
+FROM ubuntu:16.10
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  gcc libc6-dev ca-certificates \
+  gcc-aarch64-linux-gnu libc6-dev-arm64-cross qemu-user
+ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc \
+    PATH=$PATH:/rust/bin
diff --git a/libc/ci/docker/arm-linux-androideabi/Dockerfile b/libc/ci/docker/arm-linux-androideabi/Dockerfile
new file mode 100644
index 0000000..0549414
--- /dev/null
+++ b/libc/ci/docker/arm-linux-androideabi/Dockerfile
@@ -0,0 +1,32 @@
+FROM ubuntu:16.04
+
+RUN dpkg --add-architecture i386 && \
+    apt-get update && \
+    apt-get install -y --no-install-recommends \
+  file \
+  curl \
+  ca-certificates \
+  python \
+  unzip \
+  expect \
+  openjdk-9-jre \
+  libstdc++6:i386 \
+  libpulse0 \
+  gcc \
+  libc6-dev
+
+WORKDIR /android/
+COPY android* /android/
+
+ENV ANDROID_ARCH=arm
+ENV PATH=$PATH:/android/ndk-$ANDROID_ARCH/bin:/android/sdk/tools:/android/sdk/platform-tools
+
+RUN sh /android/android-install-ndk.sh $ANDROID_ARCH
+RUN sh /android/android-install-sdk.sh $ANDROID_ARCH
+RUN mv /root/.android /tmp
+RUN chmod 777 -R /tmp/.android
+RUN chmod 755 /android/sdk/tools/* /android/sdk/tools/qemu/linux-x86_64/*
+
+ENV PATH=$PATH:/rust/bin \
+    CARGO_TARGET_ARM_LINUX_ANDROIDEABI_LINKER=arm-linux-androideabi-gcc \
+    HOME=/tmp
diff --git a/libc/ci/docker/arm-unknown-linux-gnueabihf/Dockerfile b/libc/ci/docker/arm-unknown-linux-gnueabihf/Dockerfile
new file mode 100644
index 0000000..3824c04
--- /dev/null
+++ b/libc/ci/docker/arm-unknown-linux-gnueabihf/Dockerfile
@@ -0,0 +1,7 @@
+FROM ubuntu:16.10
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  gcc libc6-dev ca-certificates \
+  gcc-arm-linux-gnueabihf libc6-dev-armhf-cross qemu-user
+ENV CARGO_TARGET_ARM_UNKNOWN_LINUX_GNUEABIHF_LINKER=arm-linux-gnueabihf-gcc \
+    PATH=$PATH:/rust/bin
diff --git a/libc/ci/docker/i686-linux-android/Dockerfile b/libc/ci/docker/i686-linux-android/Dockerfile
new file mode 100644
index 0000000..bee9043
--- /dev/null
+++ b/libc/ci/docker/i686-linux-android/Dockerfile
@@ -0,0 +1,32 @@
+FROM ubuntu:16.04
+
+RUN dpkg --add-architecture i386 && \
+    apt-get update && \
+    apt-get install -y --no-install-recommends \
+  file \
+  curl \
+  ca-certificates \
+  python \
+  unzip \
+  expect \
+  openjdk-9-jre \
+  libstdc++6:i386 \
+  libpulse0 \
+  gcc \
+  libc6-dev
+
+WORKDIR /android/
+COPY android* /android/
+
+ENV ANDROID_ARCH=i686
+ENV PATH=$PATH:/android/ndk-$ANDROID_ARCH/bin:/android/sdk/tools:/android/sdk/platform-tools
+
+RUN sh /android/android-install-ndk.sh $ANDROID_ARCH
+RUN sh /android/android-install-sdk.sh $ANDROID_ARCH
+RUN mv /root/.android /tmp
+RUN chmod 777 -R /tmp/.android
+RUN chmod 755 /android/sdk/tools/* /android/sdk/tools/qemu/linux-x86_64/*
+
+ENV PATH=$PATH:/rust/bin \
+    CARGO_TARGET_I686_LINUX_ANDROID_LINKER=i686-linux-android-gcc \
+    HOME=/tmp
diff --git a/libc/ci/docker/i686-unknown-linux-gnu/Dockerfile b/libc/ci/docker/i686-unknown-linux-gnu/Dockerfile
new file mode 100644
index 0000000..c149d84
--- /dev/null
+++ b/libc/ci/docker/i686-unknown-linux-gnu/Dockerfile
@@ -0,0 +1,5 @@
+FROM ubuntu:16.10
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  gcc-multilib libc6-dev ca-certificates
+ENV PATH=$PATH:/rust/bin
diff --git a/libc/ci/docker/i686-unknown-linux-musl/Dockerfile b/libc/ci/docker/i686-unknown-linux-musl/Dockerfile
new file mode 100644
index 0000000..bdc2272
--- /dev/null
+++ b/libc/ci/docker/i686-unknown-linux-musl/Dockerfile
@@ -0,0 +1,23 @@
+FROM ubuntu:16.10
+
+RUN dpkg --add-architecture i386
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  gcc-multilib make libc6-dev git curl ca-certificates libc6:i386
+# Below we're cross-compiling musl for i686 using the system compiler on an
+# x86_64 system. This is an awkward thing to be doing and so we have to jump
+# through a couple hoops to get musl to be happy. In particular:
+#
+# * We specifically pass -m32 in CFLAGS and override CC when running ./configure,
+#   since otherwise the script will fail to find a compiler.
+# * We manually unset CROSS_COMPILE when running make; otherwise the makefile
+#   will call the non-existent binary 'i686-ar'.
+RUN curl https://www.musl-libc.org/releases/musl-1.1.15.tar.gz | \
+    tar xzf - && \
+    cd musl-1.1.15 && \
+    CC=gcc CFLAGS=-m32 ./configure --prefix=/musl-i686 --disable-shared --target=i686 && \
+    make CROSS_COMPILE= install -j4 && \
+    cd .. && \
+    rm -rf musl-1.1.15
+ENV PATH=$PATH:/musl-i686/bin:/rust/bin \
+    CC_i686_unknown_linux_musl=musl-gcc
diff --git a/libc/ci/docker/mips-unknown-linux-gnu/Dockerfile b/libc/ci/docker/mips-unknown-linux-gnu/Dockerfile
new file mode 100644
index 0000000..eea1f65
--- /dev/null
+++ b/libc/ci/docker/mips-unknown-linux-gnu/Dockerfile
@@ -0,0 +1,10 @@
+FROM ubuntu:16.10
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+        gcc libc6-dev qemu-user ca-certificates \
+        gcc-mips-linux-gnu libc6-dev-mips-cross \
+        qemu-system-mips
+
+ENV CARGO_TARGET_MIPS_UNKNOWN_LINUX_GNU_LINKER=mips-linux-gnu-gcc \
+    PATH=$PATH:/rust/bin
diff --git a/libc/ci/docker/mips-unknown-linux-musl/Dockerfile b/libc/ci/docker/mips-unknown-linux-musl/Dockerfile
new file mode 100644
index 0000000..cbc41c2
--- /dev/null
+++ b/libc/ci/docker/mips-unknown-linux-musl/Dockerfile
@@ -0,0 +1,17 @@
+FROM ubuntu:16.10
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+        gcc libc6-dev qemu-user ca-certificates qemu-system-mips curl \
+        bzip2
+
+RUN mkdir /toolchain
+
+# Note that this originally came from:
+# https://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/OpenWrt-SDK-ar71xx-generic_gcc-5.3.0_musl-1.1.15.Linux-x86_64.tar.bz2
+RUN curl -L https://s3.amazonaws.com/rust-lang-ci/libc/OpenWrt-SDK-ar71xx-generic_gcc-5.3.0_musl-1.1.15.Linux-x86_64.tar.bz2 | \
+      tar xjf - -C /toolchain --strip-components=1
+
+ENV PATH=$PATH:/rust/bin:/toolchain/staging_dir/toolchain-mips_34kc_gcc-5.3.0_musl-1.1.15/bin \
+    CC_mips_unknown_linux_musl=mips-openwrt-linux-gcc \
+    CARGO_TARGET_MIPS_UNKNOWN_LINUX_MUSL_LINKER=mips-openwrt-linux-gcc
diff --git a/libc/ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile b/libc/ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile
new file mode 100644
index 0000000..2eb5de2
--- /dev/null
+++ b/libc/ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile
@@ -0,0 +1,11 @@
+FROM ubuntu:16.10
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+        gcc libc6-dev qemu-user ca-certificates \
+        gcc-mips64-linux-gnuabi64 libc6-dev-mips64-cross \
+        qemu-system-mips64
+
+ENV CARGO_TARGET_MIPS64_UNKNOWN_LINUX_GNUABI64_LINKER=mips64-linux-gnuabi64-gcc \
+    CC_mips64_unknown_linux_gnuabi64=mips64-linux-gnuabi64-gcc \
+    PATH=$PATH:/rust/bin
diff --git a/libc/ci/docker/mipsel-unknown-linux-musl/Dockerfile b/libc/ci/docker/mipsel-unknown-linux-musl/Dockerfile
new file mode 100644
index 0000000..4c7ee8b
--- /dev/null
+++ b/libc/ci/docker/mipsel-unknown-linux-musl/Dockerfile
@@ -0,0 +1,17 @@
+FROM ubuntu:16.10
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+        gcc libc6-dev qemu-user ca-certificates qemu-system-mips curl \
+        bzip2
+
+RUN mkdir /toolchain
+
+# Note that this originally came from:
+# https://downloads.openwrt.org/snapshots/trunk/malta/generic/OpenWrt-Toolchain-malta-le_gcc-5.3.0_musl-1.1.15.Linux-x86_64.tar.bz2
+RUN curl -L https://s3.amazonaws.com/rust-lang-ci/libc/OpenWrt-Toolchain-malta-le_gcc-5.3.0_musl-1.1.15.Linux-x86_64.tar.bz2 | \
+      tar xjf - -C /toolchain --strip-components=2
+
+ENV PATH=$PATH:/rust/bin:/toolchain/bin \
+    CC_mipsel_unknown_linux_musl=mipsel-openwrt-linux-gcc \
+    CARGO_TARGET_MIPSEL_UNKNOWN_LINUX_MUSL_LINKER=mipsel-openwrt-linux-gcc
diff --git a/libc/ci/docker/powerpc-unknown-linux-gnu/Dockerfile b/libc/ci/docker/powerpc-unknown-linux-gnu/Dockerfile
new file mode 100644
index 0000000..d9d7db0
--- /dev/null
+++ b/libc/ci/docker/powerpc-unknown-linux-gnu/Dockerfile
@@ -0,0 +1,10 @@
+FROM ubuntu:16.10
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+        gcc libc6-dev qemu-user ca-certificates \
+        gcc-powerpc-linux-gnu libc6-dev-powerpc-cross \
+        qemu-system-ppc
+
+ENV CARGO_TARGET_POWERPC_UNKNOWN_LINUX_GNU_LINKER=powerpc-linux-gnu-gcc \
+    PATH=$PATH:/rust/bin
diff --git a/libc/ci/docker/powerpc64-unknown-linux-gnu/Dockerfile b/libc/ci/docker/powerpc64-unknown-linux-gnu/Dockerfile
new file mode 100644
index 0000000..df0e605
--- /dev/null
+++ b/libc/ci/docker/powerpc64-unknown-linux-gnu/Dockerfile
@@ -0,0 +1,11 @@
+FROM ubuntu:16.10
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+        gcc libc6-dev qemu-user ca-certificates \
+        gcc-powerpc64-linux-gnu libc6-dev-ppc64-cross \
+        qemu-system-ppc
+
+ENV CARGO_TARGET_POWERPC64_UNKNOWN_LINUX_GNU_LINKER=powerpc64-linux-gnu-gcc \
+    CC=powerpc64-linux-gnu-gcc \
+    PATH=$PATH:/rust/bin
diff --git a/libc/ci/docker/x86_64-rumprun-netbsd/Dockerfile b/libc/ci/docker/x86_64-rumprun-netbsd/Dockerfile
new file mode 100644
index 0000000..129771e
--- /dev/null
+++ b/libc/ci/docker/x86_64-rumprun-netbsd/Dockerfile
@@ -0,0 +1,6 @@
+FROM mato/rumprun-toolchain-hw-x86_64
+USER root
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  qemu
+ENV PATH=$PATH:/rust/bin
diff --git a/libc/ci/docker/x86_64-unknown-freebsd/Dockerfile b/libc/ci/docker/x86_64-unknown-freebsd/Dockerfile
new file mode 100644
index 0000000..12b0bdf
--- /dev/null
+++ b/libc/ci/docker/x86_64-unknown-freebsd/Dockerfile
@@ -0,0 +1,13 @@
+FROM alexcrichton/rust-slave-linux-cross:2016-04-15
+USER root
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  qemu genext2fs
+
+ENTRYPOINT ["sh"]
+
+ENV PATH=$PATH:/rust/bin \
+    QEMU=2016-11-06/freebsd.qcow2.gz \
+    CAN_CROSS=1 \
+    CARGO_TARGET_X86_64_UNKNOWN_FREEBSD_LINKER=x86_64-unknown-freebsd10-gcc
diff --git a/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile b/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
new file mode 100644
index 0000000..4af3f83
--- /dev/null
+++ b/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
@@ -0,0 +1,5 @@
+FROM ubuntu:16.10
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  gcc libc6-dev ca-certificates
+ENV PATH=$PATH:/rust/bin
diff --git a/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile b/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile
new file mode 100644
index 0000000..9c24999
--- /dev/null
+++ b/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile
@@ -0,0 +1,13 @@
+FROM ubuntu:16.10
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  gcc make libc6-dev git curl ca-certificates
+RUN curl https://www.musl-libc.org/releases/musl-1.1.15.tar.gz | \
+    tar xzf - && \
+    cd musl-1.1.15 && \
+    ./configure --prefix=/musl-x86_64 && \
+    make install -j4 && \
+    cd .. && \
+    rm -rf musl-1.1.15
+ENV PATH=$PATH:/musl-x86_64/bin:/rust/bin
diff --git a/libc/ci/docker/x86_64-unknown-openbsd/Dockerfile b/libc/ci/docker/x86_64-unknown-openbsd/Dockerfile
new file mode 100644
index 0000000..518baf8
--- /dev/null
+++ b/libc/ci/docker/x86_64-unknown-openbsd/Dockerfile
@@ -0,0 +1,8 @@
+FROM ubuntu:16.10
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  gcc libc6-dev qemu curl ca-certificates \
+  genext2fs
+ENV PATH=$PATH:/rust/bin \
+    QEMU=2016-11-06/openbsd-6.0-without-pkgs.qcow2
diff --git a/libc/ci/dox.sh b/libc/ci/dox.sh
new file mode 100644
index 0000000..85e9243
--- /dev/null
+++ b/libc/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 $target src/lib.rs --cfg dox \
+    --crate-name libc
+
+  echo "<li><a href="/libc/$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" ] && [ "$TRAVIS_BRANCH" = "master" ]; then
+  pip install ghp_import --install-option="--prefix=$HOME/.local"
+  $HOME/.local/bin/ghp-import -n target/doc
+  git push -qf https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages
+fi
diff --git a/libc/ci/ios/deploy_and_run_on_ios_simulator.rs b/libc/ci/ios/deploy_and_run_on_ios_simulator.rs
new file mode 100644
index 0000000..b146150
--- /dev/null
+++ b/libc/ci/ios/deploy_and_run_on_ios_simulator.rs
@@ -0,0 +1,171 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// This is a script to deploy and execute a binary on an iOS simulator.
+// The primary use of this is to be able to run unit tests on the simulator and
+// retrieve the results.
+//
+// To do this through Cargo instead, use Dinghy
+// (https://github.com/snipsco/dinghy): cargo dinghy install, then cargo dinghy
+// test.
+
+use std::env;
+use std::fs::{self, File};
+use std::io::Write;
+use std::path::Path;
+use std::process;
+use std::process::Command;
+
+macro_rules! t {
+    ($e:expr) => (match $e {
+        Ok(e) => e,
+        Err(e) => panic!("{} failed with: {}", stringify!($e), e),
+    })
+}
+
+// Step one: Wrap as an app
+fn package_as_simulator_app(crate_name: &str, test_binary_path: &Path) {
+    println!("Packaging simulator app");
+    drop(fs::remove_dir_all("ios_simulator_app"));
+    t!(fs::create_dir("ios_simulator_app"));
+    t!(fs::copy(test_binary_path,
+                Path::new("ios_simulator_app").join(crate_name)));
+
+    let mut f = t!(File::create("ios_simulator_app/Info.plist"));
+    t!(f.write_all(format!(r#"
+        <?xml version="1.0" encoding="UTF-8"?>
+        <!DOCTYPE plist PUBLIC
+                "-//Apple//DTD PLIST 1.0//EN"
+                "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+        <plist version="1.0">
+            <dict>
+                <key>CFBundleExecutable</key>
+                <string>{}</string>
+                <key>CFBundleIdentifier</key>
+                <string>com.rust.unittests</string>
+            </dict>
+        </plist>
+    "#, crate_name).as_bytes()));
+}
+
+// Step two: Start the iOS simulator
+fn start_simulator() {
+    println!("Looking for iOS simulator");
+    let output = t!(Command::new("xcrun").arg("simctl").arg("list").output());
+    assert!(output.status.success());
+    let mut simulator_exists = false;
+    let mut simulator_booted = false;
+    let mut found_rust_sim = false;
+    let stdout = t!(String::from_utf8(output.stdout));
+    for line in stdout.lines() {
+        if line.contains("rust_ios") {
+            if found_rust_sim {
+                panic!("Duplicate rust_ios simulators found. Please \
+                        double-check xcrun simctl list.");
+            }
+            simulator_exists = true;
+            simulator_booted = line.contains("(Booted)");
+            found_rust_sim = true;
+        }
+    }
+
+    if simulator_exists == false {
+        println!("Creating iOS simulator");
+        Command::new("xcrun")
+                .arg("simctl")
+                .arg("create")
+                .arg("rust_ios")
+                .arg("com.apple.CoreSimulator.SimDeviceType.iPhone-SE")
+                .arg("com.apple.CoreSimulator.SimRuntime.iOS-10-2")
+                .check_status();
+    } else if simulator_booted == true {
+        println!("Shutting down already-booted simulator");
+        Command::new("xcrun")
+                .arg("simctl")
+                .arg("shutdown")
+                .arg("rust_ios")
+                .check_status();
+    }
+
+    println!("Starting iOS simulator");
+    // We can't uninstall the app (if present) as that will hang if the
+    // simulator isn't completely booted; just erase the simulator instead.
+    Command::new("xcrun").arg("simctl").arg("erase").arg("rust_ios").check_status();
+    Command::new("xcrun").arg("simctl").arg("boot").arg("rust_ios").check_status();
+}
+
+// Step three: Install the app
+fn install_app_to_simulator() {
+    println!("Installing app to simulator");
+    Command::new("xcrun")
+            .arg("simctl")
+            .arg("install")
+            .arg("booted")
+            .arg("ios_simulator_app/")
+            .check_status();
+}
+
+// Step four: Run the app
+fn run_app_on_simulator() {
+    println!("Running app");
+    let output = t!(Command::new("xcrun")
+                    .arg("simctl")
+                    .arg("launch")
+                    .arg("--console")
+                    .arg("booted")
+                    .arg("com.rust.unittests")
+                    .output());
+
+    println!("stdout --\n{}\n", String::from_utf8_lossy(&output.stdout));
+    println!("stderr --\n{}\n", String::from_utf8_lossy(&output.stderr));
+
+    let stdout = String::from_utf8_lossy(&output.stdout);
+    let passed = stdout.lines()
+                       .find(|l| l.contains("PASSED"))
+                       .map(|l| l.contains("tests"))
+                       .unwrap_or(false);
+
+    println!("Shutting down simulator");
+    Command::new("xcrun")
+        .arg("simctl")
+        .arg("shutdown")
+        .arg("rust_ios")
+        .check_status();
+    if !passed {
+        panic!("tests didn't pass");
+    }
+}
+
+trait CheckStatus {
+    fn check_status(&mut self);
+}
+
+impl CheckStatus for Command {
+    fn check_status(&mut self) {
+        println!("\trunning: {:?}", self);
+        assert!(t!(self.status()).success());
+    }
+}
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    if args.len() != 2 {
+        println!("Usage: {} <executable>", args[0]);
+        process::exit(-1);
+    }
+
+    let test_binary_path = Path::new(&args[1]);
+    let crate_name = test_binary_path.file_name().unwrap();
+
+    package_as_simulator_app(crate_name.to_str().unwrap(), test_binary_path);
+    start_simulator();
+    install_app_to_simulator();
+    run_app_on_simulator();
+}
diff --git a/libc/ci/landing-page-footer.html b/libc/ci/landing-page-footer.html
new file mode 100644
index 0000000..941cc8d
--- /dev/null
+++ b/libc/ci/landing-page-footer.html
@@ -0,0 +1,3 @@
+    </ul>
+  </body>
+</html>
diff --git a/libc/ci/landing-page-head.html b/libc/ci/landing-page-head.html
new file mode 100644
index 0000000..fc69fa8
--- /dev/null
+++ b/libc/ci/landing-page-head.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+  </head>
+  <body>
+    <ul>
diff --git a/libc/ci/run-docker.sh b/libc/ci/run-docker.sh
new file mode 100644
index 0000000..1ac419a
--- /dev/null
+++ b/libc/ci/run-docker.sh
@@ -0,0 +1,34 @@
+# Small script to run tests for a target (or all targets) inside all the
+# respective docker images.
+
+set -ex
+
+run() {
+    echo $1
+    # use -f so we can use ci/ as build context
+    docker build -t libc -f ci/docker/$1/Dockerfile ci/
+    mkdir -p target
+    docker run \
+      --user `id -u`:`id -g` \
+      --rm \
+      --volume $HOME/.cargo:/cargo \
+      --env CARGO_HOME=/cargo \
+      --volume `rustc --print sysroot`:/rust:ro \
+      --volume `pwd`:/checkout:ro \
+      --volume `pwd`/target:/checkout/target \
+      --env CARGO_TARGET_DIR=/checkout/target \
+      --workdir /checkout \
+      --privileged \
+      --interactive \
+      --tty \
+      libc \
+      ci/run.sh $1
+}
+
+if [ -z "$1" ]; then
+  for d in `ls ci/docker/`; do
+    run $d
+  done
+else
+  run $1
+fi
diff --git a/libc/ci/run-qemu.sh b/libc/ci/run-qemu.sh
new file mode 100644
index 0000000..b2f457d
--- /dev/null
+++ b/libc/ci/run-qemu.sh
@@ -0,0 +1,32 @@
+# Initial script which is run inside of all qemu images. The first argument to
+# this script (as arranged by the qemu image itself) is the path to where the
+# libc crate is mounted.
+#
+# For qemu images we currently need to install Rust manually as this wasn't done
+# by the initial run-travis.sh script
+#
+# FIXME: feels like run-travis.sh should be responsible for downloading the
+#        compiler.
+
+set -ex
+
+ROOT=$1
+cp -r $ROOT/libc /tmp/libc
+cd /tmp/libc
+
+TARGET=$(cat $ROOT/TARGET)
+export CARGO_TARGET_DIR=/tmp
+
+case $TARGET in
+  *-openbsd)
+    pkg_add cargo gcc%4.9 rust
+    export CC=egcc
+    ;;
+
+  *)
+    echo "Unknown target: $TARGET"
+    exit 1
+    ;;
+esac
+
+exec sh ci/run.sh $TARGET
diff --git a/libc/ci/run.sh b/libc/ci/run.sh
new file mode 100755
index 0000000..1b6e0fb
--- /dev/null
+++ b/libc/ci/run.sh
@@ -0,0 +1,175 @@
+#!/bin/sh
+
+# Builds and runs tests for a particular target passed as an argument to this
+# script.
+
+set -ex
+
+TARGET=$1
+
+# If we're going to run tests inside of a qemu image, then we don't need any of
+# the scripts below. Instead, download the image, prepare a filesystem which has
+# the current state of this repository, and then run the image.
+#
+# It's assume that all images, when run with two disks, will run the `run.sh`
+# script from the second which we place inside.
+if [ "$QEMU" != "" ]; then
+  tmpdir=/tmp/qemu-img-creation
+  mkdir -p $tmpdir
+
+  if [ -z "${QEMU#*.gz}" ]; then
+    # image is .gz : download and uncompress it
+    qemufile=$(echo ${QEMU%.gz} | sed 's/\//__/g')
+    if [ ! -f $tmpdir/$qemufile ]; then
+      curl https://s3.amazonaws.com/rust-lang-ci/libc/$QEMU | \
+        gunzip -d > $tmpdir/$qemufile
+    fi
+  else
+    # plain qcow2 image: just download it
+    qemufile=$(echo ${QEMU} | sed 's/\//__/g')
+    if [ ! -f $tmpdir/$qemufile ]; then
+      curl https://s3.amazonaws.com/rust-lang-ci/libc/$QEMU \
+        > $tmpdir/$qemufile
+    fi
+  fi
+
+  # Create a mount a fresh new filesystem image that we'll later pass to QEMU.
+  # This will have a `run.sh` script will which use the artifacts inside to run
+  # on the host.
+  rm -f $tmpdir/libc-test.img
+  mkdir $tmpdir/mount
+
+  # If we have a cross compiler, then we just do the standard rigamarole of
+  # cross-compiling an executable and then the script to run just executes the
+  # binary.
+  #
+  # If we don't have a cross-compiler, however, then we need to do some crazy
+  # acrobatics to get this to work.  Generate all.{c,rs} on the host which will
+  # be compiled inside QEMU. Do this here because compiling syntex_syntax in
+  # QEMU would time out basically everywhere.
+  if [ "$CAN_CROSS" = "1" ]; then
+    cargo build --manifest-path libc-test/Cargo.toml --target $TARGET
+    cp $CARGO_TARGET_DIR/$TARGET/debug/libc-test $tmpdir/mount/
+    echo 'exec $1/libc-test' > $tmpdir/mount/run.sh
+  else
+    rm -rf $tmpdir/generated
+    mkdir -p $tmpdir/generated
+    cargo build --manifest-path libc-test/generate-files/Cargo.toml
+    (cd libc-test && TARGET=$TARGET OUT_DIR=$tmpdir/generated SKIP_COMPILE=1 \
+      $CARGO_TARGET_DIR/debug/generate-files)
+
+    # Copy this folder into the mounted image, the `run.sh` entry point, and
+    # overwrite the standard libc-test Cargo.toml with the overlay one which will
+    # assume the all.{c,rs} test files have already been generated
+    mkdir $tmpdir/mount/libc
+    cp -r Cargo.* libc-test src ci $tmpdir/mount/libc/
+    ln -s libc-test/target $tmpdir/mount/libc/target
+    cp ci/run-qemu.sh $tmpdir/mount/run.sh
+    echo $TARGET | tee -a $tmpdir/mount/TARGET
+    cp $tmpdir/generated/* $tmpdir/mount/libc/libc-test
+    cp libc-test/run-generated-Cargo.toml $tmpdir/mount/libc/libc-test/Cargo.toml
+  fi
+
+  du -sh $tmpdir/mount
+  genext2fs \
+      --root $tmpdir/mount \
+      --size-in-blocks 100000 \
+      $tmpdir/libc-test.img
+
+  # Pass -snapshot to prevent tampering with the disk images, this helps when
+  # running this script in development. The two drives are then passed next,
+  # first is the OS and second is the one we just made. Next the network is
+  # configured to work (I'm not entirely sure how), and then finally we turn off
+  # graphics and redirect the serial console output to out.log.
+  qemu-system-x86_64 \
+    -m 1024 \
+    -snapshot \
+    -drive if=virtio,file=$tmpdir/$qemufile \
+    -drive if=virtio,file=$tmpdir/libc-test.img \
+    -net nic,model=virtio \
+    -net user \
+    -nographic \
+    -vga none 2>&1 | tee $CARGO_TARGET_DIR/out.log
+  exec grep "^PASSED .* tests" $CARGO_TARGET_DIR/out.log
+fi
+
+case "$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 | aarch64-linux-android | i686-linux-android)
+    # set SHELL so android can detect a 64bits system, see
+    # http://stackoverflow.com/a/41789144
+    # https://issues.jenkins-ci.org/browse/JENKINS-26930?focusedCommentId=230791&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-230791
+    export SHELL=/bin/dash
+    arch=$(echo $TARGET | cut -d- -f1)
+    emulator @$arch -no-window -no-accel &
+    adb wait-for-device
+    adb push $CARGO_TARGET_DIR/$TARGET/debug/libc-test /data/local/tmp/libc-test
+    adb shell /data/local/tmp/libc-test 2>&1 | tee /tmp/out
+    grep "^PASSED .* tests" /tmp/out
+    ;;
+
+  i386-apple-ios)
+    rustc -O ./ci/ios/deploy_and_run_on_ios_simulator.rs
+    ./deploy_and_run_on_ios_simulator $CARGO_TARGET_DIR/$TARGET/debug/libc-test
+    ;;
+
+  x86_64-apple-ios)
+    rustc -O ./ci/ios/deploy_and_run_on_ios_simulator.rs
+    ./deploy_and_run_on_ios_simulator $CARGO_TARGET_DIR/$TARGET/debug/libc-test
+    ;;
+
+  arm-unknown-linux-gnueabihf)
+    qemu-arm -L /usr/arm-linux-gnueabihf $CARGO_TARGET_DIR/$TARGET/debug/libc-test
+    ;;
+
+  mips-unknown-linux-gnu)
+    qemu-mips -L /usr/mips-linux-gnu $CARGO_TARGET_DIR/$TARGET/debug/libc-test
+    ;;
+
+  mips64-unknown-linux-gnuabi64)
+    qemu-mips64 -L /usr/mips64-linux-gnuabi64 $CARGO_TARGET_DIR/$TARGET/debug/libc-test
+    ;;
+
+  mips-unknown-linux-musl)
+    qemu-mips -L /toolchain/staging_dir/toolchain-mips_34kc_gcc-5.3.0_musl-1.1.15 \
+              $CARGO_TARGET_DIR/$TARGET/debug/libc-test
+    ;;
+
+  mipsel-unknown-linux-musl)
+      qemu-mipsel -L /toolchain $CARGO_TARGET_DIR/$TARGET/debug/libc-test
+      ;;
+
+  powerpc-unknown-linux-gnu)
+    qemu-ppc -L /usr/powerpc-linux-gnu $CARGO_TARGET_DIR/$TARGET/debug/libc-test
+    ;;
+
+  powerpc64-unknown-linux-gnu)
+    qemu-ppc64 -L /usr/powerpc64-linux-gnu $CARGO_TARGET_DIR/$TARGET/debug/libc-test
+    ;;
+
+  aarch64-unknown-linux-gnu)
+    qemu-aarch64 -L /usr/aarch64-linux-gnu/ $CARGO_TARGET_DIR/$TARGET/debug/libc-test
+    ;;
+
+  *-rumprun-netbsd)
+    rumprun-bake hw_virtio /tmp/libc-test.img $CARGO_TARGET_DIR/$TARGET/debug/libc-test
+    qemu-system-x86_64 -nographic -vga none -m 64 \
+        -kernel /tmp/libc-test.img 2>&1 | tee /tmp/out &
+    sleep 5
+    grep "^PASSED .* tests" /tmp/out
+    ;;
+
+  *)
+    $CARGO_TARGET_DIR/$TARGET/debug/libc-test
+    ;;
+esac
diff --git a/libc/ci/style.rs b/libc/ci/style.rs
new file mode 100644
index 0000000..32e4ba7
--- /dev/null
+++ b/libc/ci/style.rs
@@ -0,0 +1,204 @@
+//! Simple script to verify the coding style of this library
+//!
+//! ## How to run
+//!
+//! The first argument to this script is the directory to run on, so running
+//! this script should be as simple as:
+//!
+//! ```notrust
+//! rustc ci/style.rs
+//! ./style src
+//! ```
+//!
+//! ## Guidelines
+//!
+//! The current style is:
+//!
+//! * No trailing whitespace
+//! * No tabs
+//! * 80-character lines
+//! * `extern` instead of `extern "C"`
+//! * Specific module layout:
+//!     1. use directives
+//!     2. typedefs
+//!     3. structs
+//!     4. constants
+//!     5. f! { ... } functions
+//!     6. extern functions
+//!     7. modules + pub use
+//!
+//! Things not verified:
+//!
+//! * alignment
+//! * 4-space tabs
+//! * leading colons on paths
+
+use std::env;
+use std::fs;
+use std::io::prelude::*;
+use std::path::Path;
+
+macro_rules! t {
+    ($e:expr) => (match $e {
+        Ok(e) => e,
+        Err(e) => panic!("{} failed with {}", stringify!($e), e),
+    })
+}
+
+fn main() {
+    let arg = env::args().skip(1).next().unwrap_or(".".to_string());
+
+    let mut errors = Errors { errs: false };
+    walk(Path::new(&arg), &mut errors);
+
+    if errors.errs {
+        panic!("found some lint errors");
+    } else {
+        println!("good style!");
+    }
+}
+
+fn walk(path: &Path, err: &mut Errors) {
+    for entry in t!(path.read_dir()).map(|e| t!(e)) {
+        let path = entry.path();
+        if t!(entry.file_type()).is_dir() {
+            walk(&path, err);
+            continue
+        }
+
+        let name = entry.file_name().into_string().unwrap();
+        match &name[..] {
+            n if !n.ends_with(".rs") => continue,
+
+            "dox.rs" |
+            "lib.rs" |
+            "macros.rs" => continue,
+
+            _ => {}
+        }
+
+        let mut contents = String::new();
+        t!(t!(fs::File::open(&path)).read_to_string(&mut contents));
+
+        check_style(&contents, &path, err);
+    }
+}
+
+struct Errors {
+    errs: bool,
+}
+
+#[derive(Clone, Copy, PartialEq)]
+enum State {
+    Start,
+    Imports,
+    Typedefs,
+    Structs,
+    Constants,
+    FunctionDefinitions,
+    Functions,
+    Modules,
+}
+
+fn check_style(file: &str, path: &Path, err: &mut Errors) {
+    let mut state = State::Start;
+    let mut s_macros = 0;
+    let mut f_macros = 0;
+    let mut prev_blank = false;
+
+    for (i, line) in file.lines().enumerate() {
+        if line == "" {
+            if prev_blank {
+                err.error(path, i, "double blank line");
+            }
+            prev_blank = true;
+        } else {
+            prev_blank = false;
+        }
+        if line != line.trim_right() {
+            err.error(path, i, "trailing whitespace");
+        }
+        if line.contains("\t") {
+            err.error(path, i, "tab character");
+        }
+        if line.len() > 80 {
+            err.error(path, i, "line longer than 80 chars");
+        }
+        if line.contains("extern \"C\"") {
+            err.error(path, i, "use `extern` instead of `extern \"C\"");
+        }
+        if line.contains("#[cfg(") && !line.contains(" if ") {
+            if state != State::Structs {
+                err.error(path, i, "use cfg_if! and submodules \
+                                    instead of #[cfg]");
+            }
+        }
+
+        let line = line.trim_left();
+        let is_pub = line.starts_with("pub ");
+        let line = if is_pub {&line[4..]} else {line};
+
+        let line_state = if line.starts_with("use ") {
+            if is_pub {
+                State::Modules
+            } else {
+                State::Imports
+            }
+        } else if line.starts_with("const ") {
+            State::Constants
+        } else if line.starts_with("type ") {
+            State::Typedefs
+        } else if line.starts_with("s! {") {
+            s_macros += 1;
+            State::Structs
+        } else if line.starts_with("f! {") {
+            f_macros += 1;
+            State::FunctionDefinitions
+        } else if line.starts_with("extern ") {
+            State::Functions
+        } else if line.starts_with("mod ") {
+            State::Modules
+        } else {
+            continue
+        };
+
+        if state as usize > line_state as usize {
+            err.error(path, i, &format!("{} found after {} when \
+                                         it belongs before",
+                                        line_state.desc(), state.desc()));
+        }
+
+        if f_macros == 2 {
+            f_macros += 1;
+            err.error(path, i, "multiple f! macros in one module");
+        }
+        if s_macros == 2 {
+            s_macros += 1;
+            err.error(path, i, "multiple s! macros in one module");
+        }
+
+        state = line_state;
+    }
+}
+
+impl State {
+    fn desc(&self) -> &str {
+        match *self {
+            State::Start => "start",
+            State::Imports => "import",
+            State::Typedefs => "typedef",
+            State::Structs => "struct",
+            State::Constants => "constant",
+            State::FunctionDefinitions => "function definition",
+            State::Functions => "extern function",
+            State::Modules => "module",
+        }
+    }
+}
+
+impl Errors {
+    fn error(&mut self, path: &Path, line: usize, msg: &str) {
+        self.errs = true;
+        println!("{}:{} - {}", path.display(), line + 1, msg);
+    }
+}