Update libc crate to 0.2.55

This change updates the libc crate to version 0.2.55.

Import subrepo libc/:libc at caf17a0641d29dc624621177f5756804dd180c13

43 files changed, 552 insertions, 87 deletions

diff --git a/libc/ci/android-install-ndk.sh b/libc/ci/android-install-ndk.sh
index ce11d00..54f7b2e 100644
--- a/libc/ci/android-install-ndk.sh
+++ b/libc/ci/android-install-ndk.sh
@@ -11,7 +11,7 @@
 
 set -ex
 
-curl --retry 5 -O https://dl.google.com/android/repository/android-ndk-r15b-linux-x86_64.zip
+curl --retry 10 -O https://dl.google.com/android/repository/android-ndk-r15b-linux-x86_64.zip
 unzip -q android-ndk-r15b-linux-x86_64.zip
 
 case "$1" in
diff --git a/libc/ci/android-install-sdk.sh b/libc/ci/android-install-sdk.sh
index 6b5ac09..e011cfc 100644
--- a/libc/ci/android-install-sdk.sh
+++ b/libc/ci/android-install-sdk.sh
@@ -19,7 +19,7 @@ set -ex
 # which apparently magically accepts the licenses.
 
 mkdir sdk
-curl --retry 5 https://dl.google.com/android/repository/sdk-tools-linux-3859397.zip -O
+curl --retry 10 https://dl.google.com/android/repository/sdk-tools-linux-3859397.zip -O
 unzip -d sdk sdk-tools-linux-3859397.zip
 
 case "$1" in
@@ -45,6 +45,9 @@ case "$1" in
     ;;
 esac;
 
+# See: https://stackoverflow.com/a/51644855/1422197
+export JAVA_OPTS='-XX:+IgnoreUnrecognizedVMOptions --add-modules java.se.ee'
+
 # --no_https avoids
      # javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: No trusted certificate found
 yes | ./sdk/tools/bin/sdkmanager --licenses --no_https
diff --git a/libc/ci/build.sh b/libc/ci/build.sh
new file mode 100644
index 0000000..eb07c18
--- /dev/null
+++ b/libc/ci/build.sh
@@ -0,0 +1,214 @@
+#!/usr/bin/env sh
+
+# Checks that libc builds properly for all supported targets on a particular
+# Rust version:
+
+set -ex
+
+RUST=${TRAVIS_RUST_VERSION}
+OS=${TRAVIS_OS_NAME}
+
+echo "Testing Rust ${RUST} on ${OS}"
+
+test_target() {
+    CARGO="${1}"
+    TARGET="${2}"
+    NO_STD="${3}"
+
+    opt=
+    if [ "${TARGET}" = "x86_64-unknown-linux-gnux32" ]; then
+        # FIXME: x86_64-unknown-linux-gnux32 fail to compile without
+        # --release
+        #
+        # See https://github.com/rust-lang/rust/issues/45417
+        opt="--release"
+    fi
+
+    # If there is a std component, fetch it:
+    if [ "${NO_STD}" != "1" ]; then
+        # FIXME: rustup often fails to download some artifacts due to network
+        # issues, so we retry this N times.
+        N=5
+        n=0
+        until [ $n -ge $N ]
+        do
+            if rustup target add "${TARGET}" --toolchain "${RUST}" ; then
+                break
+            fi
+            n=$((n+1))
+            sleep 1
+        done
+    fi
+
+    # Test that libc builds without any default features (no libstd)
+    "$CARGO" "+${RUST}" build -vv $opt --no-default-features --target "${TARGET}"
+
+    # Test that libc builds with default features (e.g. libstd)
+    # if the target supports libstd
+    if [ "$NO_STD" != "1" ]; then
+        "$CARGO" "+${RUST}" build -vv $opt --target "${TARGET}"
+    fi
+
+    # Test that libc builds with the `extra_traits` feature
+    "$CARGO" "+${RUST}" build -vv $opt --no-default-features --target "${TARGET}" \
+          --features extra_traits
+
+    # Also test that it builds with `extra_traits` and default features:
+    if [ "$NO_STD" != "1" ]; then
+        "$CARGO" "+${RUST}" build -vv $opt --target "${TARGET}" \
+              --features extra_traits
+    fi
+}
+
+RUST_LINUX_TARGETS="\
+aarch64-linux-android \
+aarch64-unknown-linux-gnu \
+arm-linux-androideabi \
+arm-unknown-linux-gnueabi \
+arm-unknown-linux-gnueabihf \
+armv7-linux-androideabi \
+armv7-unknown-linux-gnueabihf \
+i586-unknown-linux-gnu \
+i686-linux-android \
+i686-unknown-freebsd \
+i686-unknown-linux-gnu \
+i686-unknown-linux-musl \
+mips-unknown-linux-gnu \
+mips-unknown-linux-musl \
+mips64-unknown-linux-gnuabi64 \
+mips64el-unknown-linux-gnuabi64 \
+mipsel-unknown-linux-gnu \
+mipsel-unknown-linux-gnu \
+mipsel-unknown-linux-musl \
+powerpc-unknown-linux-gnu \
+powerpc64-unknown-linux-gnu \
+powerpc64le-unknown-linux-gnu \
+s390x-unknown-linux-gnu \
+x86_64-unknown-freebsd \
+x86_64-unknown-linux-gnu \
+x86_64-unknown-linux-musl \
+x86_64-unknown-netbsd \
+"
+
+RUST_GT_1_13_LINUX_TARGETS="\
+arm-unknown-linux-musleabi \
+arm-unknown-linux-musleabihf \
+armv7-unknown-linux-musleabihf \
+sparc64-unknown-linux-gnu \
+wasm32-unknown-emscripten \
+x86_64-linux-android \
+x86_64-rumprun-netbsd \
+"
+RUST_GT_1_19_LINUX_TARGETS="\
+aarch64-unknown-linux-musl \
+sparcv9-sun-solaris \
+wasm32-unknown-unknown \
+x86_64-sun-solaris \
+"
+RUST_GT_1_24_LINUX_TARGETS="\
+i586-unknown-linux-musl \
+x86_64-unknown-cloudabi \
+"
+
+RUST_NIGHTLY_LINUX_TARGETS="\
+aarch64-fuchsia \
+armv5te-unknown-linux-gnueabi \
+armv5te-unknown-linux-musleabi \
+i686-pc-windows-gnu \
+wasm32-wasi \
+x86_64-fortanix-unknown-sgx \
+x86_64-fuchsia \
+x86_64-pc-windows-gnu \
+x86_64-unknown-linux-gnux32 \
+x86_64-unknown-redox \
+"
+
+RUST_OSX_TARGETS="\
+aarch64-apple-ios \
+armv7-apple-ios \
+armv7s-apple-ios \
+i386-apple-ios \
+i686-apple-darwin \
+x86_64-apple-darwin \
+x86_64-apple-ios \
+"
+
+# The targets are listed here alphabetically
+TARGETS=""
+case "${OS}" in
+    linux*)
+        TARGETS="${RUST_LINUX_TARGETS}"
+
+        if [ "${RUST}" != "1.13.0" ]; then
+            TARGETS="${TARGETS} ${RUST_GT_1_13_LINUX_TARGETS}"
+            if [ "${RUST}" != "1.19.0" ]; then
+                TARGETS="${TARGETS} ${RUST_GT_1_19_LINUX_TARGETS}"
+                if [ "${RUST}" != "1.24.0" ]; then
+                    TARGETS="${TARGETS} ${RUST_GT_1_24_LINUX_TARGETS}"
+                fi
+            fi
+        fi
+
+        if [ "${RUST}" = "nightly" ]; then
+            TARGETS="${TARGETS} ${RUST_NIGHTLY_LINUX_TARGETS}"
+        fi
+
+        ;;
+    osx*)
+        TARGETS="${RUST_OSX_TARGETS}"
+        ;;
+    *)
+        ;;
+esac
+
+for TARGET in $TARGETS; do
+    test_target cargo "$TARGET"
+done
+
+# FIXME: https://github.com/rust-lang/rust/issues/58564
+# sparc-unknown-linux-gnu
+RUST_LINUX_NO_CORE_TARGETS="\
+aarch64-pc-windows-msvc \
+aarch64-unknown-cloudabi \
+aarch64-unknown-hermit \
+aarch64-unknown-netbsd \
+aarch64-unknown-openbsd \
+armebv7r-none-eabi \
+armebv7r-none-eabihf \
+armv7-unknown-cloudabi-eabihf \
+armv7r-none-eabi \
+armv7r-none-eabihf \
+i586-pc-windows-msvc \
+i686-pc-windows-msvc \
+i686-unknown-cloudabi \
+i686-unknown-haiku \
+i686-unknown-netbsd \
+i686-unknown-openbsd \
+mips-unknown-linux-uclibc \
+mipsel-unknown-linux-uclibc \
+nvptx64-nvidia-cuda \
+powerpc-unknown-linux-gnuspe \
+powerpc-unknown-netbsd \
+riscv32imac-unknown-none-elf \
+riscv32imc-unknown-none-elf \
+sparc64-unknown-netbsd \
+thumbv6m-none-eabi \
+thumbv7em-none-eabi \
+thumbv7em-none-eabihf \
+thumbv7m-none-eabi \
+thumbv7neon-linux-androideabi \
+thumbv7neon-unknown-linux-gnueabihf \
+thumbv8m.main-none-eabi \
+x86_64-pc-windows-msvc
+x86_64-unknown-dragonfly \
+x86_64-unknown-haiku \
+x86_64-unknown-hermit \
+x86_64-unknown-l4re-uclibc \
+x86_64-unknown-openbsd \
+"
+
+if [ "${RUST}" = "nightly" ] && [ "${OS}" = "linux" ]; then
+    for TARGET in $RUST_LINUX_NO_CORE_TARGETS; do
+        test_target xargo "$TARGET" 1
+    done
+fi
diff --git a/libc/ci/docker/aarch64-linux-android/Dockerfile b/libc/ci/docker/aarch64-linux-android/Dockerfile
index 5fc83aa..1458423 100644
--- a/libc/ci/docker/aarch64-linux-android/Dockerfile
+++ b/libc/ci/docker/aarch64-linux-android/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:19.04
 
 RUN dpkg --add-architecture i386 && \
     apt-get update && \
@@ -9,7 +9,7 @@ RUN dpkg --add-architecture i386 && \
   python \
   unzip \
   expect \
-  openjdk-9-jre \
+  openjdk-11-jre \
   libstdc++6:i386 \
   libpulse0 \
   gcc \
diff --git a/libc/ci/docker/aarch64-unknown-linux-gnu/Dockerfile b/libc/ci/docker/aarch64-unknown-linux-gnu/Dockerfile
index 18214a3..716a445 100644
--- a/libc/ci/docker/aarch64-unknown-linux-gnu/Dockerfile
+++ b/libc/ci/docker/aarch64-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc libc6-dev ca-certificates \
   gcc-aarch64-linux-gnu libc6-dev-arm64-cross qemu-user
diff --git a/libc/ci/docker/aarch64-unknown-linux-musl/Dockerfile b/libc/ci/docker/aarch64-unknown-linux-musl/Dockerfile
index fbc47d9..143a960 100644
--- a/libc/ci/docker/aarch64-unknown-linux-musl/Dockerfile
+++ b/libc/ci/docker/aarch64-unknown-linux-musl/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc make libc6-dev git curl ca-certificates \
diff --git a/libc/ci/docker/arm-linux-androideabi/Dockerfile b/libc/ci/docker/arm-linux-androideabi/Dockerfile
index a3fc64b..acc784e 100644
--- a/libc/ci/docker/arm-linux-androideabi/Dockerfile
+++ b/libc/ci/docker/arm-linux-androideabi/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:19.04
 
 RUN dpkg --add-architecture i386 && \
     apt-get update && \
@@ -9,7 +9,7 @@ RUN dpkg --add-architecture i386 && \
   python \
   unzip \
   expect \
-  openjdk-9-jre \
+  openjdk-11-jre \
   libstdc++6:i386 \
   libpulse0 \
   gcc \
diff --git a/libc/ci/docker/arm-unknown-linux-gnueabihf/Dockerfile b/libc/ci/docker/arm-unknown-linux-gnueabihf/Dockerfile
index 9fe71dc..bcdbb22 100644
--- a/libc/ci/docker/arm-unknown-linux-gnueabihf/Dockerfile
+++ b/libc/ci/docker/arm-unknown-linux-gnueabihf/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc libc6-dev ca-certificates \
   gcc-arm-linux-gnueabihf libc6-dev-armhf-cross qemu-user
diff --git a/libc/ci/docker/arm-unknown-linux-musleabihf/Dockerfile b/libc/ci/docker/arm-unknown-linux-musleabihf/Dockerfile
index 0d493ca..e29e854 100644
--- a/libc/ci/docker/arm-unknown-linux-musleabihf/Dockerfile
+++ b/libc/ci/docker/arm-unknown-linux-musleabihf/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc make libc6-dev git curl ca-certificates \
diff --git a/libc/ci/docker/asmjs-unknown-emscripten/Dockerfile b/libc/ci/docker/asmjs-unknown-emscripten/Dockerfile
index 3088fc5..6c08340 100644
--- a/libc/ci/docker/asmjs-unknown-emscripten/Dockerfile
+++ b/libc/ci/docker/asmjs-unknown-emscripten/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:19.04
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
diff --git a/libc/ci/docker/i686-linux-android/Dockerfile b/libc/ci/docker/i686-linux-android/Dockerfile
index f0836c3..59ea2d7 100644
--- a/libc/ci/docker/i686-linux-android/Dockerfile
+++ b/libc/ci/docker/i686-linux-android/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:19.04
 
 RUN dpkg --add-architecture i386 && \
     apt-get update && \
@@ -9,7 +9,7 @@ RUN dpkg --add-architecture i386 && \
   python \
   unzip \
   expect \
-  openjdk-9-jre \
+  openjdk-11-jre \
   libstdc++6:i386 \
   libpulse0 \
   gcc \
diff --git a/libc/ci/docker/i686-unknown-linux-gnu/Dockerfile b/libc/ci/docker/i686-unknown-linux-gnu/Dockerfile
index 03f3e8e..5563a7b 100644
--- a/libc/ci/docker/i686-unknown-linux-gnu/Dockerfile
+++ b/libc/ci/docker/i686-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \
   gcc-multilib libc6-dev ca-certificates
diff --git a/libc/ci/docker/i686-unknown-linux-musl/Dockerfile b/libc/ci/docker/i686-unknown-linux-musl/Dockerfile
index b726e4d..c085c10 100644
--- a/libc/ci/docker/i686-unknown-linux-musl/Dockerfile
+++ b/libc/ci/docker/i686-unknown-linux-musl/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN dpkg --add-architecture i386
 RUN apt-get update
diff --git a/libc/ci/docker/mips-unknown-linux-gnu/Dockerfile b/libc/ci/docker/mips-unknown-linux-gnu/Dockerfile
index c66abd4..9f1bcaf 100644
--- a/libc/ci/docker/mips-unknown-linux-gnu/Dockerfile
+++ b/libc/ci/docker/mips-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \
diff --git a/libc/ci/docker/mips-unknown-linux-musl/Dockerfile b/libc/ci/docker/mips-unknown-linux-musl/Dockerfile
index dde22fd..7f2764c 100644
--- a/libc/ci/docker/mips-unknown-linux-musl/Dockerfile
+++ b/libc/ci/docker/mips-unknown-linux-musl/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates qemu-system-mips curl \
diff --git a/libc/ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile b/libc/ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile
index b9921fc..b97cdb4 100644
--- a/libc/ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile
+++ b/libc/ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \
diff --git a/libc/ci/docker/mips64el-unknown-linux-gnuabi64/Dockerfile b/libc/ci/docker/mips64el-unknown-linux-gnuabi64/Dockerfile
index 434c908..7f79452 100644
--- a/libc/ci/docker/mips64el-unknown-linux-gnuabi64/Dockerfile
+++ b/libc/ci/docker/mips64el-unknown-linux-gnuabi64/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \
diff --git a/libc/ci/docker/mipsel-unknown-linux-musl/Dockerfile b/libc/ci/docker/mipsel-unknown-linux-musl/Dockerfile
index 037bf64..03e8357 100644
--- a/libc/ci/docker/mipsel-unknown-linux-musl/Dockerfile
+++ b/libc/ci/docker/mipsel-unknown-linux-musl/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates qemu-system-mips curl \
diff --git a/libc/ci/docker/powerpc-unknown-linux-gnu/Dockerfile b/libc/ci/docker/powerpc-unknown-linux-gnu/Dockerfile
index 106ada4..9fa05af 100644
--- a/libc/ci/docker/powerpc-unknown-linux-gnu/Dockerfile
+++ b/libc/ci/docker/powerpc-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \
@@ -7,4 +7,5 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 
 ENV CARGO_TARGET_POWERPC_UNKNOWN_LINUX_GNU_LINKER=powerpc-linux-gnu-gcc \
     CARGO_TARGET_POWERPC_UNKNOWN_LINUX_GNU_RUNNER="qemu-ppc -L /usr/powerpc-linux-gnu" \
+    CC=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
index a6ab66a..ab40789 100644
--- a/libc/ci/docker/powerpc64-unknown-linux-gnu/Dockerfile
+++ b/libc/ci/docker/powerpc64-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \
diff --git a/libc/ci/docker/powerpc64le-unknown-linux-gnu/Dockerfile b/libc/ci/docker/powerpc64le-unknown-linux-gnu/Dockerfile
index 627123e..4dcd632 100644
--- a/libc/ci/docker/powerpc64le-unknown-linux-gnu/Dockerfile
+++ b/libc/ci/docker/powerpc64le-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \
diff --git a/libc/ci/docker/s390x-unknown-linux-gnu/Dockerfile b/libc/ci/docker/s390x-unknown-linux-gnu/Dockerfile
index 861f4f9..75c11c1 100644
--- a/libc/ci/docker/s390x-unknown-linux-gnu/Dockerfile
+++ b/libc/ci/docker/s390x-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         curl ca-certificates \
diff --git a/libc/ci/docker/sparc64-unknown-linux-gnu/Dockerfile b/libc/ci/docker/sparc64-unknown-linux-gnu/Dockerfile
index d9edaab..d1f4503 100644
--- a/libc/ci/docker/sparc64-unknown-linux-gnu/Dockerfile
+++ b/libc/ci/docker/sparc64-unknown-linux-gnu/Dockerfile
@@ -1,14 +1,11 @@
-FROM debian:stretch
+FROM ubuntu:19.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         curl ca-certificates \
         gcc libc6-dev \
         gcc-sparc64-linux-gnu libc6-dev-sparc64-cross \
         qemu-system-sparc64 openbios-sparc seabios ipxe-qemu \
-        p7zip-full cpio linux-libc-dev-sparc64-cross linux-headers-4.9.0-3-common
-
-# Put linux/module.h into the right spot as it is not shipped by debian
-RUN cp /usr/src/linux-headers-4.9.0-3-common/include/uapi/linux/module.h /usr/sparc64-linux-gnu/include/linux/
+        p7zip-full cpio linux-libc-dev-sparc64-cross
 
 COPY linux-sparc64.sh /
 RUN bash /linux-sparc64.sh
diff --git a/libc/ci/docker/wasm32-unknown-emscripten/Dockerfile b/libc/ci/docker/wasm32-unknown-emscripten/Dockerfile
index 59bf7d9..de8e353 100644
--- a/libc/ci/docker/wasm32-unknown-emscripten/Dockerfile
+++ b/libc/ci/docker/wasm32-unknown-emscripten/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:19.04
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
diff --git a/libc/ci/docker/wasm32-wasi/Dockerfile b/libc/ci/docker/wasm32-wasi/Dockerfile
new file mode 100644
index 0000000..d963a44
--- /dev/null
+++ b/libc/ci/docker/wasm32-wasi/Dockerfile
@@ -0,0 +1,93 @@
+# In the first container we want to assemble the `wasi-sysroot` by compiling it
+# from source. This requires a clang 8.0+ compiler with enough wasm support and
+# then we're just running a standard `make` inside of what we clone.
+FROM ubuntu:18.04 as wasi-sysroot
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+    ca-certificates \
+    clang \
+    cmake \
+    curl \
+    g++ \
+    git \
+    libc6-dev \
+    libclang-dev \
+    make \
+    ssh \
+    xz-utils
+
+# Fetch clang 8.0+ which is used to compile the wasi target and link our
+# programs together.
+RUN curl http://releases.llvm.org/8.0.0/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04.tar.xz | tar xJf -
+RUN mv /clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04 /wasmcc
+
+# Note that we're using `git reset --hard` to pin to a specific commit for
+# verification for now. The sysroot is currently in somewhat of a state of flux
+# and is expected to have breaking changes, so this is an attempt to mitigate
+# those breaking changes on `libc`'s own CI
+RUN git clone https://github.com/CraneStation/wasi-sysroot && \
+  cd wasi-sysroot && \
+  git reset --hard eee6ee7566e26f2535eb6088c8494a112ff423b9
+RUN make -C wasi-sysroot install -j $(nproc) WASM_CC=/wasmcc/bin/clang INSTALL_DIR=/wasi-sysroot
+
+# This is a small wrapper script which executes the actual clang binary in
+# `/wasmcc` and then is sure to pass the right `--sysroot` argument which we
+# just built above.
+COPY docker/wasm32-wasi/clang.sh /wasi-sysroot/bin/clang
+
+# In the second container we're going to build the `wasmtime` binary which is
+# used to execute wasi executables. This is a standard Rust project so we're
+# just checking out a known revision (which pairs with the sysroot one we
+# downlaoded above) and then we're building it with Cargo
+FROM ubuntu:18.04 as wasmtime
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+    ca-certificates \
+    clang \
+    cmake \
+    curl \
+    g++ \
+    git \
+    libclang-dev \
+    make \
+    ssh
+
+RUN curl -sSf https://sh.rustup.rs |  sh -s -- -y
+ENV PATH=/root/.cargo/bin:$PATH
+
+RUN apt-get install -y --no-install-recommends python
+RUN git clone --recursive https://github.com/CraneStation/wasmtime wasmtime && \
+  cd wasmtime && \
+  git reset --hard 67edb00f29b62864b00179fe4bfa99bc29973285
+RUN cargo build --release --manifest-path wasmtime/Cargo.toml
+
+# And finally in the last image we're going to assemble everything together.
+# We'll install things needed at runtime for now and then copy over the
+# sysroot/wasmtime artifacts into their final location.
+FROM ubuntu:18.04
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+    gcc \
+    libc6-dev \
+    libxml2 \
+    ca-certificates
+
+# Copy over clang we downloaded to link executables ...
+COPY --from=wasi-sysroot /wasmcc /wasmcc/
+# ... and the sysroot we built to link executables against ...
+COPY --from=wasi-sysroot /wasi-sysroot/ /wasi-sysroot/
+# ... and finally wasmtime to actually execute binaries
+COPY --from=wasmtime /wasmtime/target/release/wasmtime /usr/bin/
+
+# Of note here is our clang wrapper which just executes a normal clang
+# executable with the right sysroot, and then we're sure to turn off the
+# crt-static feature to ensure that the CRT that we're specifying with `clang`
+# is used.
+ENV CARGO_TARGET_WASM32_WASI_RUNNER=wasmtime \
+  CARGO_TARGET_WASM32_WASI_LINKER=/wasi-sysroot/bin/clang \
+  CC_wasm32_wasi=/wasi-sysroot/bin/clang \
+  PATH=$PATH:/rust/bin \
+  RUSTFLAGS=-Ctarget-feature=-crt-static
diff --git a/libc/ci/docker/wasm32-wasi/clang.sh b/libc/ci/docker/wasm32-wasi/clang.sh
new file mode 100755
index 0000000..6f29812
--- /dev/null
+++ b/libc/ci/docker/wasm32-wasi/clang.sh
@@ -0,0 +1,2 @@
+#!/usr/bin/env sh
+exec /wasmcc/bin/clang --target=wasm32-wasi --sysroot /wasi-sysroot "$@"
diff --git a/libc/ci/docker/x86_64-linux-android/Dockerfile b/libc/ci/docker/x86_64-linux-android/Dockerfile
index 0cfbc48..b0984c0 100644
--- a/libc/ci/docker/x86_64-linux-android/Dockerfile
+++ b/libc/ci/docker/x86_64-linux-android/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:19.04
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
diff --git a/libc/ci/docker/x86_64-rumprun-netbsd/runtest.rs b/libc/ci/docker/x86_64-rumprun-netbsd/runtest.rs
index 94b5946..7e96fbf 100644
--- a/libc/ci/docker/x86_64-rumprun-netbsd/runtest.rs
+++ b/libc/ci/docker/x86_64-rumprun-netbsd/runtest.rs
@@ -47,7 +47,8 @@ fn find_ok(input: &mut Read, tx: mpsc::Sender<()>) {
     for line in BufReader::new(input).lines() {
         let line = line.unwrap();
         println!("{}", line);
-        if line.starts_with("PASSED ") && line.contains(" tests") {
+        if (line.starts_with("PASSED ") && line.contains(" tests")) ||
+            line.starts_with("test result: ok"){
             tx.send(()).unwrap();
         }
     }
diff --git a/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile b/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
index 6ab9c92..0dbb191 100644
--- a/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
+++ b/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \
   gcc libc6-dev ca-certificates
diff --git a/libc/ci/docker/x86_64-unknown-linux-gnux32/Dockerfile b/libc/ci/docker/x86_64-unknown-linux-gnux32/Dockerfile
index 03f3e8e..5563a7b 100644
--- a/libc/ci/docker/x86_64-unknown-linux-gnux32/Dockerfile
+++ b/libc/ci/docker/x86_64-unknown-linux-gnux32/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \
   gcc-multilib libc6-dev ca-certificates
diff --git a/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile b/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile
index 0a27709..59164d2 100644
--- a/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile
+++ b/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:17.10
+FROM ubuntu:19.04
 
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \
diff --git a/libc/ci/dox.sh b/libc/ci/dox.sh
index 521743e..ce55081 100644
--- a/libc/ci/dox.sh
+++ b/libc/ci/dox.sh
@@ -6,28 +6,65 @@
 
 set -ex
 
-TARGETS=$(grep html_root_url src/lib.rs | sed 's/.*".*\/\(.*\)"/\1/'| sed 's/)//')
+TARGET_DOC_DIR=target/doc
+README=README.md
+PLATFORM_SUPPORT=platform-support.md
 
-rm -rf target/doc
-mkdir -p target/doc
+rm -rf $TARGET_DOC_DIR
+mkdir -p $TARGET_DOC_DIR
 
-cp ci/landing-page-head.html target/doc/index.html
+# List all targets that do currently build successfully:
+# shellcheck disable=SC1003
+grep '[\d|\w|-]* \\' ci/build.sh > targets
+sed -i.bak 's/ \\//g' targets
+grep '^[_a-zA-Z0-9-]*$' targets > tmp && mv tmp targets
 
-for target in $TARGETS; do
-  echo "documenting ${target}"
+# Create a markdown list of supported platforms in $PLATFORM_SUPPORT
+rm $PLATFORM_SUPPORT || true
 
-  rustdoc -o "target/doc/${target}" --target "${target}" src/lib.rs --cfg cross_platform_docs \
-    --crate-name libc
+printf '### Platform-specific documentation\n' >> $PLATFORM_SUPPORT
 
-  echo "<li><a href=\"/libc/${target}/libc/index.html\">${target}</a></li>" \
-    >> target/doc/index.html
-done
+while read -r target; do
+    echo "documenting ${target}"
 
-cat ci/landing-page-footer.html >> target/doc/index.html
+    case "${target}" in
+        *apple*)
+            # FIXME:
+            # We can't build docs of apple targets from Linux yet.
+            continue
+            ;;
+        *)
+            ;;
+    esac
+
+    rustup target add "${target}" || true
+
+    # If cargo doc fails, then try xargo:
+    if ! cargo doc --target "${target}" \
+             --no-default-features  --features extra_traits ; then
+        xargo doc --target "${target}" \
+              --no-default-features  --features extra_traits
+    fi
+
+    cp -r "target/${target}/doc" "${TARGET_DOC_DIR}/${target}"
+
+    echo "* [${target}](${target}/libc/index.html)" >> $PLATFORM_SUPPORT
+done < targets
+
+# Replace <div class="platform_support"></div> with the contents of $PLATFORM_SUPPORT
+cp $README $TARGET_DOC_DIR
+line=$(grep -n '<div class="platform_docs"></div>' $README | cut -d ":" -f 1)
+
+set +x
+{ head -n "$((line-1))" $README; cat $PLATFORM_SUPPORT; tail -n "+$((line+1))" $README; } > $TARGET_DOC_DIR/$README
+set -x
+
+# Copy the licenses
+cp LICENSE-* $TARGET_DOC_DIR/
 
 # 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
+  "${HOME}/.local/bin/ghp-import" $TARGET_DOC_DIR
   git push -qf "https://${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
index 95df52d..2075be6 100644
--- a/libc/ci/ios/deploy_and_run_on_ios_simulator.rs
+++ b/libc/ci/ios/deploy_and_run_on_ios_simulator.rs
@@ -129,8 +129,11 @@ fn run_app_on_simulator() {
 
     let stdout = String::from_utf8_lossy(&output.stdout);
     let passed = stdout.lines()
-                       .find(|l| l.contains("PASSED"))
-                       .map(|l| l.contains("tests"))
+                       .find(|l|
+                             (l.contains("PASSED") &&
+                              l.contains("tests")) ||
+                             l.contains("test result: ok")
+                        )
                        .unwrap_or(false);
 
     println!("Shutting down simulator");
diff --git a/libc/ci/landing-page-footer.html b/libc/ci/landing-page-footer.html
deleted file mode 100644
index 941cc8d..0000000
--- a/libc/ci/landing-page-footer.html
+++ /dev/null
@@ -1,3 +0,0 @@
-    </ul>
-  </body>
-</html>
diff --git a/libc/ci/landing-page-head.html b/libc/ci/landing-page-head.html
deleted file mode 100644
index fc69fa8..0000000
--- a/libc/ci/landing-page-head.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8">
-  </head>
-  <body>
-    <ul>
diff --git a/libc/ci/linux-s390x.sh b/libc/ci/linux-s390x.sh
index a230cfe..00a7f88 100644
--- a/libc/ci/linux-s390x.sh
+++ b/libc/ci/linux-s390x.sh
@@ -6,8 +6,8 @@ mkdir -m 777 /qemu
 cd /qemu
 
 curl --retry 5 -LO https://github.com/qemu/qemu/raw/master/pc-bios/s390-ccw.img
-curl --retry 5 -LO http://ftp.debian.org/debian/dists/testing/main/installer-s390x/20170828/images/generic/kernel.debian
-curl --retry 5 -LO http://ftp.debian.org/debian/dists/testing/main/installer-s390x/20170828/images/generic/initrd.debian
+curl --retry 5 -LO http://ftp.debian.org/debian/dists/testing/main/installer-s390x/20190410/images/generic/kernel.debian
+curl --retry 5 -LO http://ftp.debian.org/debian/dists/testing/main/installer-s390x/20190410/images/generic/initrd.debian
 
 mv kernel.debian kernel
 mv initrd.debian initrd.gz
diff --git a/libc/ci/linux-sparc64.sh b/libc/ci/linux-sparc64.sh
index 7fb28d9..5580a0e 100644
--- a/libc/ci/linux-sparc64.sh
+++ b/libc/ci/linux-sparc64.sh
@@ -5,11 +5,11 @@ set -ex
 mkdir -m 777 /qemu
 cd /qemu
 
-curl --retry 5 -LO https://cdimage.debian.org/cdimage/ports/9.0/sparc64/iso-cd/debian-9.0-sparc64-NETINST-1.iso
-7z e debian-9.0-sparc64-NETINST-1.iso boot/initrd.gz
-7z e debian-9.0-sparc64-NETINST-1.iso boot/sparc64
+curl --retry 5 -LO https://cdimage.debian.org/cdimage/ports/10.0/sparc64/iso-cd/debian-10.0-sparc64-NETINST-1.iso
+7z e debian-10.0-sparc64-NETINST-1.iso boot/initrd.gz
+7z e debian-10.0-sparc64-NETINST-1.iso boot/sparc64
 mv sparc64 kernel
-rm debian-9.0-sparc64-NETINST-1.iso
+rm debian-10.0-sparc64-NETINST-1.iso
 
 mkdir init
 cd init
diff --git a/libc/ci/run.sh b/libc/ci/run.sh
index 81ebd61..427d3bf 100755
--- a/libc/ci/run.sh
+++ b/libc/ci/run.sh
@@ -77,7 +77,7 @@ if [ "$QEMU" != "" ]; then
     -net user \
     -nographic \
     -vga none 2>&1 | tee "${CARGO_TARGET_DIR}/out.log"
-  exec grep "^PASSED .* tests" "${CARGO_TARGET_DIR}/out.log"
+  exec egrep "^(PASSED)|(test result: ok)" "${CARGO_TARGET_DIR}/out.log"
 fi
 
 # FIXME: x86_64-unknown-linux-gnux32 fail to compile without --release
@@ -87,13 +87,10 @@ if [ "$TARGET" = "x86_64-unknown-linux-gnux32" ]; then
   opt="--release"
 fi
 
-# Building with --no-default-features is currently broken on rumprun because we
-# need cfg(target_vendor), which is currently unstable.
-if [ "$TARGET" != "x86_64-rumprun-netbsd" ]; then
-  cargo test $opt --no-default-features --manifest-path libc-test/Cargo.toml --target "${TARGET}"
-fi
-# Test the #[repr(align(x))] feature if this is building on Rust >= 1.25
-if [ "$(rustc --version | sed -E 's/^rustc 1\.([0-9]*)\..*/\1/')" -ge 25 ]; then
-  cargo test $opt --features align --manifest-path libc-test/Cargo.toml --target "${TARGET}"
-fi
-exec cargo test $opt --manifest-path libc-test/Cargo.toml --target "${TARGET}"
+cargo test $opt --no-default-features --manifest-path libc-test/Cargo.toml \
+      --target "${TARGET}"
+
+cargo test $opt --manifest-path libc-test/Cargo.toml --target "${TARGET}"
+
+cargo test $opt --features extra_traits --manifest-path libc-test/Cargo.toml \
+      --target "${TARGET}"
diff --git a/libc/ci/runtest-android.rs b/libc/ci/runtest-android.rs
index a8f8db8..b8030c4 100644
--- a/libc/ci/runtest-android.rs
+++ b/libc/ci/runtest-android.rs
@@ -3,14 +3,18 @@ use std::process::Command;
 use std::path::{Path, PathBuf};
 
 fn main() {
-    assert_eq!(env::args_os().len(), 2);
-    let test = PathBuf::from(env::args_os().nth(1).unwrap());
+    let args = env::args_os()
+        .skip(1)
+        .filter(|arg| arg != "--quiet")
+        .collect::<Vec<_>>();
+    assert_eq!(args.len(), 1);
+    let test = PathBuf::from(&args[0]);
     let dst = Path::new("/data/local/tmp").join(test.file_name().unwrap());
 
     let status = Command::new("adb")
         .arg("wait-for-device")
         .status()
-        .expect("failed to run rumprun-bake");
+        .expect("failed to run: adb wait-for-device");
     assert!(status.success());
 
     let status = Command::new("adb")
@@ -18,14 +22,14 @@ fn main() {
         .arg(&test)
         .arg(&dst)
         .status()
-        .expect("failed to run rumprun-bake");
+        .expect("failed to run: adb pushr");
     assert!(status.success());
 
     let output = Command::new("adb")
         .arg("shell")
         .arg(&dst)
         .output()
-        .expect("failed to run rumprun-bake");
+        .expect("failed to run: adb shell");
     assert!(status.success());
 
     println!("status: {}\nstdout ---\n{}\nstderr ---\n{}",
@@ -34,8 +38,10 @@ fn main() {
              String::from_utf8_lossy(&output.stderr));
 
     let stdout = String::from_utf8_lossy(&output.stdout);
-    let mut lines = stdout.lines().filter(|l| l.starts_with("PASSED "));
-    if !lines.any(|l| l.contains(" tests")) {
+    stdout.lines().find(|l|
+        (l.starts_with("PASSED ") && l.contains(" tests")) ||
+        l.starts_with("test result: ok")
+    ).unwrap_or_else(|| {
         panic!("failed to find successful test run");
-    }
+    });
 }
diff --git a/libc/ci/semver.sh b/libc/ci/semver.sh
new file mode 100644
index 0000000..ac6be36
--- /dev/null
+++ b/libc/ci/semver.sh
@@ -0,0 +1,70 @@
+#!/usr/bin/env sh
+
+# Checks that libc does not contain breaking changes for the following targets.
+
+set -ex
+
+OS=${TRAVIS_OS_NAME}
+
+echo "Testing Semver on ${OS}"
+
+TARGETS=
+case "${OS}" in
+    *linux*)
+        TARGETS="\
+aarch64-fuchsia \
+aarch64-linux-android \
+aarch64-unknown-linux-gnu \
+aarch64-unknown-linux-musl \
+armv7-linux-androideabi \
+armv7-unknown-linux-gnueabihf \
+i586-unknown-linux-gnu \
+i586-unknown-linux-musl \
+i686-linux-android \
+i686-unknown-freebsd \
+i686-unknown-linux-gnu \
+i686-unknown-linux-musl \
+i686-pc-windows-gnu \
+x86_64-unknown-freebsd \
+x86_64-unknown-linux-gnu \
+x86_64-unknown-linux-musl \
+x86_64-unknown-netbsd \
+x86_64-unknown-cloudabi \
+x86_64-sun-solaris \
+x86_64-fuchsia \
+x86_64-pc-windows-gnu \
+x86_64-unknown-linux-gnux32 \
+x86_64-unknown-redox \
+x86_64-fortanix-unknown-sgx \
+wasm32-unknown-unknown \
+"
+    ;;
+    *osx*)
+        TARGETS="\
+aarch64-apple-ios \
+armv7-apple-ios \
+armv7s-apple-ios \
+i386-apple-ios \
+i686-apple-darwin \
+x86_64-apple-darwin \
+x86_64-apple-ios \
+"
+    ;;
+esac
+
+for TARGET in $TARGETS; do
+    # FIXME: rustup often fails to download some artifacts due to network
+    # issues, so we retry this N times.
+    N=5
+    n=0
+    until [ $n -ge $N ]
+    do
+        if rustup target add "${TARGET}" ; then
+            break
+        fi
+        n=$((n+1))
+        sleep 1
+    done
+
+    cargo +nightly semver --api-guidelines --target="${TARGET}"
+done
diff --git a/libc/ci/style.rs b/libc/ci/style.rs
index 747e26c..481f57f 100644
--- a/libc/ci/style.rs
+++ b/libc/ci/style.rs
@@ -144,6 +144,9 @@ fn check_style(file: &str, path: &Path, err: &mut Errors) {
         let line = if is_pub {&line[4..]} else {line};
 
         let line_state = if line.starts_with("use ") {
+            if line.contains("c_void") {
+                continue;
+            }
             if is_pub {
                 State::Modules
             } else {
diff --git a/libc/ci/switch.json b/libc/ci/switch.json
new file mode 100644
index 0000000..bc18948
--- /dev/null
+++ b/libc/ci/switch.json
@@ -0,0 +1,37 @@
+{
+  "family": "unix",
+  "env": "newlib",
+  "target-env": "newlib",
+  "target-family": "unix",
+  "target-c-int-width": "32",
+  "target-endian": "little",
+  "target-pointer-width": "64",
+  "os": "horizon",
+  "arch": "aarch64",
+  "panic-strategy": "unwind",
+  "abi-blacklist": [
+      "stdcall",
+      "fastcall",
+      "vectorcall",
+      "thiscall",
+      "win64",
+      "sysv64"
+  ],
+  "dynamic-linking" : false,
+  "features": "+a53,+strict-align",
+  "data-layout": "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128",
+  "executables": true,
+  "position-independent-executables" : true,
+  "linker-flavor": "gcc",
+  "llvm-target": "aarch64-unknown-none",
+  "has-elf-tls" : false,
+  "linker-is-gnu" : true,
+  "disable-redzone" : true,
+  "relocation-model" : "pic",
+  "max-atomic-width": 128,
+  "exe-suffix": ".elf",
+  "staticlib-suffix" : ".a",
+  "trap-unreachable" : true,
+  "emit-debug-gdb-scripts" : true,
+  "requires-uwtable" : true
+}
\ No newline at end of file
diff --git a/libc/ci/test-runner-linux b/libc/ci/test-runner-linux
index 5f1fb23..569fa00 100755
--- a/libc/ci/test-runner-linux
+++ b/libc/ci/test-runner-linux
@@ -5,7 +5,18 @@ set -e
 arch=$1
 prog=$2
 
+# Skip cmsg test on linux-s390x
+# https://github.com/rust-lang/libc/issues/1240
+if [ "$arch" = "s390x" ]; then
+	progbasename=`basename $prog`
+	if [ "${progbasename%%-*}" = "cmsg" ]; then
+		exit 0
+	fi
+fi
+
 cd /qemu/init
+echo "#!/bin/sh\n/prog --color=never" > run_prog.sh
+chmod +x run_prog.sh
 cp -f $2 prog
 find . | cpio --create --format='newc' --quiet | gzip > ../initrd.gz
 cd ..
@@ -15,9 +26,9 @@ timeout 30s qemu-system-$arch \
   -nographic \
   -kernel kernel \
   -initrd initrd.gz \
-  -append init=/prog > output || true
+  -append init=/run_prog.sh > output || true
 
 # remove kernel messages
 tr -d '\r' < output | egrep -v '^\['
 
-grep PASSED output > /dev/null
+egrep "(PASSED)|(test result: ok)" output > /dev/null