Add m-esr52 at 52.6.0

22 files changed, 782 insertions, 0 deletions

diff --git a/third_party/rust/libc/ci/README.md b/third_party/rust/libc/ci/README.md
new file mode 100644
index 000000000..13c7c8da5
--- /dev/null
+++ b/third_party/rust/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/third_party/rust/libc/ci/docker/aarch64-unknown-linux-gnu/Dockerfile b/third_party/rust/libc/ci/docker/aarch64-unknown-linux-gnu/Dockerfile
new file mode 100644
index 000000000..1c7235cd0
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/aarch64-unknown-linux-gnu/Dockerfile
@@ -0,0 +1,7 @@
+FROM ubuntu:14.04
+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=$PATH:/rust/bin
diff --git a/third_party/rust/libc/ci/docker/arm-linux-androideabi/Dockerfile b/third_party/rust/libc/ci/docker/arm-linux-androideabi/Dockerfile
new file mode 100644
index 000000000..0e41ba6db
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/arm-linux-androideabi/Dockerfile
@@ -0,0 +1,4 @@
+FROM alexcrichton/rust-slave-android:2015-11-22
+ENV CARGO_TARGET_ARM_LINUX_ANDROIDEABI_LINKER=arm-linux-androideabi-gcc \
+    PATH=$PATH:/rust/bin
+ENTRYPOINT ["sh"]
diff --git a/third_party/rust/libc/ci/docker/arm-unknown-linux-gnueabihf/Dockerfile b/third_party/rust/libc/ci/docker/arm-unknown-linux-gnueabihf/Dockerfile
new file mode 100644
index 000000000..3a858e388
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/arm-unknown-linux-gnueabihf/Dockerfile
@@ -0,0 +1,7 @@
+FROM ubuntu:16.04
+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=$PATH:/rust/bin
diff --git a/third_party/rust/libc/ci/docker/i686-unknown-linux-gnu/Dockerfile b/third_party/rust/libc/ci/docker/i686-unknown-linux-gnu/Dockerfile
new file mode 100644
index 000000000..63450ff9e
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/i686-unknown-linux-gnu/Dockerfile
@@ -0,0 +1,5 @@
+FROM ubuntu:16.04
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  gcc-multilib libc6-dev ca-certificates
+ENV PATH=$PATH:/rust/bin
diff --git a/third_party/rust/libc/ci/docker/i686-unknown-linux-musl/Dockerfile b/third_party/rust/libc/ci/docker/i686-unknown-linux-musl/Dockerfile
new file mode 100644
index 000000000..89d60ff7b
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/i686-unknown-linux-musl/Dockerfile
@@ -0,0 +1,13 @@
+FROM ubuntu:16.04
+
+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-1.1.14.tar.gz | \
+    tar xzf - && \
+    cd musl-1.1.14 && \
+    CFLAGS=-m32 ./configure --prefix=/musl-i686 --disable-shared --target=i686 && \
+    make install -j4 && \
+    cd .. && \
+    rm -rf musl-1.1.14
+ENV PATH=$PATH:/musl-i686/bin:/rust/bin
diff --git a/third_party/rust/libc/ci/docker/mips-unknown-linux-gnu/Dockerfile b/third_party/rust/libc/ci/docker/mips-unknown-linux-gnu/Dockerfile
new file mode 100644
index 000000000..6194026af
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/mips-unknown-linux-gnu/Dockerfile
@@ -0,0 +1,10 @@
+FROM ubuntu:16.04
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+        gcc libc6-dev qemu-user ca-certificates \
+        gcc-mips-linux-gnu libc6-dev-mips-cross \
+        qemu-system-mips
+
+ENV CARGO_TARGET_MIPS_UNKNOWN_LINUX_GNU_LINKER=mips-linux-gnu-gcc \
+    PATH=$PATH:/rust/bin
diff --git a/third_party/rust/libc/ci/docker/mipsel-unknown-linux-musl/Dockerfile b/third_party/rust/libc/ci/docker/mipsel-unknown-linux-musl/Dockerfile
new file mode 100644
index 000000000..bf7b45b75
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/mipsel-unknown-linux-musl/Dockerfile
@@ -0,0 +1,14 @@
+FROM ubuntu:16.04
+
+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
+RUN curl -L 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 | \
+      tar xjf - -C /toolchain --strip-components=2
+
+ENV PATH=$PATH:/rust/bin:/toolchain/bin \
+    CC_mipsel_unknown_linux_musl=mipsel-openwrt-linux-gcc \
+    CARGO_TARGET_MIPSEL_UNKNOWN_LINUX_MUSL_LINKER=mipsel-openwrt-linux-gcc
diff --git a/third_party/rust/libc/ci/docker/powerpc-unknown-linux-gnu/Dockerfile b/third_party/rust/libc/ci/docker/powerpc-unknown-linux-gnu/Dockerfile
new file mode 100644
index 000000000..052db4903
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/powerpc-unknown-linux-gnu/Dockerfile
@@ -0,0 +1,10 @@
+FROM ubuntu:16.04
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+        gcc libc6-dev qemu-user ca-certificates \
+        gcc-powerpc-linux-gnu libc6-dev-powerpc-cross \
+        qemu-system-ppc
+
+ENV CARGO_TARGET_POWERPC_UNKNOWN_LINUX_GNU_LINKER=powerpc-linux-gnu-gcc \
+    PATH=$PATH:/rust/bin
diff --git a/third_party/rust/libc/ci/docker/powerpc64-unknown-linux-gnu/Dockerfile b/third_party/rust/libc/ci/docker/powerpc64-unknown-linux-gnu/Dockerfile
new file mode 100644
index 000000000..03ce673e5
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/powerpc64-unknown-linux-gnu/Dockerfile
@@ -0,0 +1,11 @@
+FROM ubuntu:16.04
+
+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=$PATH:/rust/bin
diff --git a/third_party/rust/libc/ci/docker/x86_64-rumprun-netbsd/Dockerfile b/third_party/rust/libc/ci/docker/x86_64-rumprun-netbsd/Dockerfile
new file mode 100644
index 000000000..129771e76
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/x86_64-rumprun-netbsd/Dockerfile
@@ -0,0 +1,6 @@
+FROM mato/rumprun-toolchain-hw-x86_64
+USER root
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  qemu
+ENV PATH=$PATH:/rust/bin
diff --git a/third_party/rust/libc/ci/docker/x86_64-unknown-freebsd/Dockerfile b/third_party/rust/libc/ci/docker/x86_64-unknown-freebsd/Dockerfile
new file mode 100644
index 000000000..bffcaa0ce
--- /dev/null
+++ b/third_party/rust/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 qemu-kvm kmod cpu-checker
+
+ENTRYPOINT ["sh"]
+
+ENV PATH=$PATH:/rust/bin \
+    QEMU=freebsd.qcow2 \
+    CAN_CROSS=1 \
+    CARGO_TARGET_X86_64_UNKNOWN_FREEBSD_LINKER=x86_64-unknown-freebsd10-gcc
diff --git a/third_party/rust/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile b/third_party/rust/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
new file mode 100644
index 000000000..294a0621c
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
@@ -0,0 +1,5 @@
+FROM ubuntu:16.04
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  gcc libc6-dev ca-certificates
+ENV PATH=$PATH:/rust/bin
diff --git a/third_party/rust/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile b/third_party/rust/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile
new file mode 100644
index 000000000..f44003806
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile
@@ -0,0 +1,13 @@
+FROM ubuntu:16.04
+
+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-1.1.14.tar.gz | \
+    tar xzf - && \
+    cd musl-1.1.14 && \
+    ./configure --prefix=/musl-x86_64 && \
+    make install -j4 && \
+    cd .. && \
+    rm -rf musl-1.1.14
+ENV PATH=$PATH:/musl-x86_64/bin:/rust/bin
diff --git a/third_party/rust/libc/ci/docker/x86_64-unknown-openbsd/Dockerfile b/third_party/rust/libc/ci/docker/x86_64-unknown-openbsd/Dockerfile
new file mode 100644
index 000000000..f0343c136
--- /dev/null
+++ b/third_party/rust/libc/ci/docker/x86_64-unknown-openbsd/Dockerfile
@@ -0,0 +1,7 @@
+FROM ubuntu:16.04
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  gcc libc6-dev qemu qemu-kvm curl ca-certificates kmod cpu-checker
+ENV PATH=$PATH:/rust/bin \
+    QEMU=openbsd.qcow2
diff --git a/third_party/rust/libc/ci/dox.sh b/third_party/rust/libc/ci/dox.sh
new file mode 100644
index 000000000..88d882dca
--- /dev/null
+++ b/third_party/rust/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 --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/third_party/rust/libc/ci/landing-page-footer.html b/third_party/rust/libc/ci/landing-page-footer.html
new file mode 100644
index 000000000..941cc8d2b
--- /dev/null
+++ b/third_party/rust/libc/ci/landing-page-footer.html
@@ -0,0 +1,3 @@
+    </ul>
+  </body>
+</html>
diff --git a/third_party/rust/libc/ci/landing-page-head.html b/third_party/rust/libc/ci/landing-page-head.html
new file mode 100644
index 000000000..fc69fa88e
--- /dev/null
+++ b/third_party/rust/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/third_party/rust/libc/ci/run-docker.sh b/third_party/rust/libc/ci/run-docker.sh
new file mode 100644
index 000000000..5ad90652f
--- /dev/null
+++ b/third_party/rust/libc/ci/run-docker.sh
@@ -0,0 +1,25 @@
+# Small script to run tests for a target (or all targets) inside all the
+# respective docker images.
+
+set -ex
+
+run() {
+    echo $1
+    docker build -t libc ci/docker/$1
+    docker run \
+      -v `rustc --print sysroot`:/rust:ro \
+      -v `pwd`:/checkout:ro \
+      -e CARGO_TARGET_DIR=/tmp/target \
+      -w /checkout \
+      --privileged \
+      -it 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/third_party/rust/libc/ci/run-qemu.sh b/third_party/rust/libc/ci/run-qemu.sh
new file mode 100644
index 000000000..70f312e3b
--- /dev/null
+++ b/third_party/rust/libc/ci/run-qemu.sh
@@ -0,0 +1,35 @@
+# 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 $TARGET in
+  *-openbsd)
+    pkg_add rust curl gcc-4.8.4p4
+    curl https://static.rust-lang.org/cargo-dist/2015-04-02/cargo-nightly-x86_64-unknown-openbsd.tar.gz | \
+      tar xzf - -C /tmp
+    export PATH=$PATH:/tmp/cargo-nightly-x86_64-unknown-openbsd/cargo/bin
+    export CC=egcc
+    ;;
+
+  *)
+    echo "Unknown target: $TARGET"
+    exit 1
+    ;;
+esac
+
+exec sh ci/run.sh $TARGET
diff --git a/third_party/rust/libc/ci/run.sh b/third_party/rust/libc/ci/run.sh
new file mode 100755
index 000000000..4e04ddddc
--- /dev/null
+++ b/third_party/rust/libc/ci/run.sh
@@ -0,0 +1,147 @@
+#!/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 [ ! -f $tmpdir/$QEMU ]; then
+    curl https://people.mozilla.org/~acrichton/libc-test/qemu/$QEMU.gz | \
+      gunzip -d > $tmpdir/$QEMU
+  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 $tmpdir/libc-test.img
+  dd if=/dev/null of=$tmpdir/libc-test.img bs=1M seek=50
+  mkfs.ext2 -F $tmpdir/libc-test.img
+  rm -rf $tmpdir/mount
+  mkdir $tmpdir/mount
+  mount -t ext2 -o loop $tmpdir/libc-test.img $tmpdir/mount
+
+  # If we have a cross compiler, then we just do the standard rigamarole of
+  # cross-compiling an executable and then the script to run just executes the
+  # binary.
+  #
+  # If we don't have a cross-compiler, however, then we need to do some crazy
+  # acrobatics to get this to work.  Generate all.{c,rs} on the host which will
+  # be compiled inside QEMU. Do this here because compiling syntex_syntax in
+  # QEMU would time out basically everywhere.
+  if [ "$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
+
+  umount $tmpdir/mount
+
+  # If we can use kvm, prefer that, otherwise just fall back to user-space
+  # emulation.
+  if kvm-ok; then
+    program=kvm
+  else
+    program=qemu-system-x86_64
+  fi
+
+  # 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.
+  $program \
+    -m 1024 \
+    -snapshot \
+    -drive if=virtio,file=$tmpdir/$QEMU \
+    -drive if=virtio,file=$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)
+    emulator @arm-21 -no-window &
+    adb wait-for-device
+    adb push $CARGO_TARGET_DIR/$TARGET/debug/libc-test /data/libc-test
+    adb shell /data/libc-test 2>&1 | tee /tmp/out
+    grep "^PASSED .* tests" /tmp/out
+    ;;
+
+  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
+    ;;
+
+  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/third_party/rust/libc/ci/style.rs b/third_party/rust/libc/ci/style.rs
new file mode 100644
index 000000000..32e4ba772
--- /dev/null
+++ b/third_party/rust/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);
+    }
+}