Update libc crate to 0.2.57

This change updates the libc crate to version 0.2.57.

Import subrepo libc/:libc at cdc48ea36d8d2890dba38e8f779001e6855339a2

21 files changed, 164 insertions, 115 deletions

diff --git a/libc/ci/android-install-ndk.sh b/libc/ci/android-install-ndk.sh
index 54f7b2e..723e719 100644
--- a/libc/ci/android-install-ndk.sh
+++ b/libc/ci/android-install-ndk.sh
@@ -11,27 +11,40 @@
 
 set -ex
 
-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
+NDK=android-ndk-r19c
+curl --retry 20 -O https://dl.google.com/android/repository/${NDK}-linux-x86_64.zip
+unzip -q ${NDK}-linux-x86_64.zip
 
 case "$1" in
+  arm)
+    arch=arm
+    api=24
+    ;;
+  armv7)
+    arch=arm
+    api=24
+    ;;
   aarch64)
     arch=arm64
+    api=24
     ;;
-
   i686)
     arch=x86
+    api=28
+    ;;
+  x86_64)
+    arch=x86_64
+    api=28
     ;;
-
   *)
-    arch=$1
+    echo "invalid arch: $1"
+    exit 1
     ;;
 esac;
 
-android-ndk-r15b/build/tools/make_standalone_toolchain.py \
-        --unified-headers \
+${NDK}/build/tools/make_standalone_toolchain.py \
         --install-dir "/android/ndk-${1}" \
         --arch "${arch}" \
-        --api 24
+        --api ${api}
 
-rm -rf ./android-ndk-r15b-linux-x86_64.zip ./android-ndk-r15b
+rm -rf ./${NDK}-linux-x86_64.zip ./${NDK}
diff --git a/libc/ci/android-install-sdk.sh b/libc/ci/android-install-sdk.sh
index e011cfc..7f21040 100644
--- a/libc/ci/android-install-sdk.sh
+++ b/libc/ci/android-install-sdk.sh
@@ -18,46 +18,56 @@ set -ex
 # located in https://github.com/appunite/docker by just wrapping it in a script
 # which apparently magically accepts the licenses.
 
+SDK=4333796
 mkdir sdk
-curl --retry 10 https://dl.google.com/android/repository/sdk-tools-linux-3859397.zip -O
-unzip -d sdk sdk-tools-linux-3859397.zip
+curl --retry 20 https://dl.google.com/android/repository/sdk-tools-linux-${SDK}.zip -O
+unzip -q -d sdk sdk-tools-linux-${SDK}.zip
 
 case "$1" in
   arm | armv7)
-    abi=armeabi-v7a
+    api=24
+    image="system-images;android-${api};google_apis;armeabi-v7a"
     ;;
-
   aarch64)
-    abi=arm64-v8a
+    api=24
+    image="system-images;android-${api};google_apis;arm64-v8a"
     ;;
-
   i686)
-    abi=x86
+    api=28
+    image="system-images;android-${api};default;x86"
     ;;
-
   x86_64)
-    abi=x86_64
+    api=28
+    image="system-images;android-${api};default;x86_64"
     ;;
-
   *)
     echo "invalid arch: $1"
     exit 1
     ;;
 esac;
 
-# See: https://stackoverflow.com/a/51644855/1422197
-export JAVA_OPTS='-XX:+IgnoreUnrecognizedVMOptions --add-modules java.se.ee'
+# Try to fix warning about missing file.
+# See https://askubuntu.com/a/1078784
+mkdir -p /root/.android/
+echo '### User Sources for Android SDK Manager' >> /root/.android/repositories.cfg
+echo '#Fri Nov 03 10:11:27 CET 2017 count=0' >> /root/.android/repositories.cfg
+
+# Print all available packages
+# yes | ./sdk/tools/bin/sdkmanager --list --verbose
 
 # --no_https avoids
-     # javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: No trusted certificate found
-yes | ./sdk/tools/bin/sdkmanager --licenses --no_https
+# javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: No trusted certificate found
+#
+# | grep -v = || true    removes the progress bar output from the sdkmanager
+# which produces an insane amount of output.
+yes | ./sdk/tools/bin/sdkmanager --licenses --no_https | grep -v = || true
 yes | ./sdk/tools/bin/sdkmanager --no_https \
         "emulator" \
         "platform-tools" \
-        "platforms;android-24" \
-        "system-images;android-24;default;$abi"
+        "platforms;android-${api}" \
+        "${image}" | grep -v = || true
 
 echo "no" |
     ./sdk/tools/bin/avdmanager create avd \
         --name "${1}" \
-        --package "system-images;android-24;default;$abi"
+        --package "${image}" | grep -v = || true
diff --git a/libc/ci/build.sh b/libc/ci/build.sh
index eb07c18..707dd4a 100644
--- a/libc/ci/build.sh
+++ b/libc/ci/build.sh
@@ -23,6 +23,11 @@ test_target() {
         # See https://github.com/rust-lang/rust/issues/45417
         opt="--release"
     fi
+    # FIXME: https://github.com/rust-lang/rust/issues/61174
+    if [ "${TARGET}" = "sparcv9-sun-solaris" ] ||
+       [ "${TARGET}" = "x86_64-sun-solaris" ]; then
+        return 0
+    fi
 
     # If there is a std component, fetch it:
     if [ "${NO_STD}" != "1" ]; then
@@ -170,6 +175,7 @@ done
 RUST_LINUX_NO_CORE_TARGETS="\
 aarch64-pc-windows-msvc \
 aarch64-unknown-cloudabi \
+aarch64-unknown-freebsd \
 aarch64-unknown-hermit \
 aarch64-unknown-netbsd \
 aarch64-unknown-openbsd \
@@ -189,6 +195,7 @@ mipsel-unknown-linux-uclibc \
 nvptx64-nvidia-cuda \
 powerpc-unknown-linux-gnuspe \
 powerpc-unknown-netbsd \
+powerpc64-unknown-freebsd \
 riscv32imac-unknown-none-elf \
 riscv32imc-unknown-none-elf \
 sparc64-unknown-netbsd \
diff --git a/libc/ci/docker/aarch64-linux-android/Dockerfile b/libc/ci/docker/aarch64-linux-android/Dockerfile
index 1458423..6751dd9 100644
--- a/libc/ci/docker/aarch64-linux-android/Dockerfile
+++ b/libc/ci/docker/aarch64-linux-android/Dockerfile
@@ -9,7 +9,7 @@ RUN dpkg --add-architecture i386 && \
   python \
   unzip \
   expect \
-  openjdk-11-jre \
+  openjdk-8-jre \
   libstdc++6:i386 \
   libpulse0 \
   gcc \
diff --git a/libc/ci/docker/aarch64-unknown-linux-musl/Dockerfile b/libc/ci/docker/aarch64-unknown-linux-musl/Dockerfile
index 143a960..e9634bf 100644
--- a/libc/ci/docker/aarch64-unknown-linux-musl/Dockerfile
+++ b/libc/ci/docker/aarch64-unknown-linux-musl/Dockerfile
@@ -3,21 +3,9 @@ FROM ubuntu:19.04
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc make libc6-dev git curl ca-certificates \
   gcc-aarch64-linux-gnu qemu-user
-RUN curl --retry 5 https://www.musl-libc.org/releases/musl-1.1.19.tar.gz | \
-    tar xzf - && \
-    cd musl-1.1.19 && \
-    CC=aarch64-linux-gnu-gcc \
-    ./configure --prefix=/musl-aarch64 --enable-wrapper=yes && \
-    make install -j4 && \
-    cd .. && \
-    rm -rf musl-1.1.19
-# Install linux kernel headers sanitized for use with musl
-RUN curl --retry 5 -L https://github.com/sabotage-linux/kernel-headers/archive/v3.12.6-6.tar.gz | \
-    tar xzf - && \
-    cd kernel-headers-3.12.6-6 && \
-    make ARCH=arm64 prefix=/musl-aarch64 install -j4 && \
-    cd .. && \
-    rm -rf kernel-headers-3.12.6-6
+
+COPY install-musl.sh /
+RUN sh /install-musl.sh aarch64
 
 # FIXME: shouldn't need the `-lgcc` here, shouldn't that be in libstd?
 ENV PATH=$PATH:/musl-aarch64/bin:/rust/bin \
diff --git a/libc/ci/docker/arm-linux-androideabi/Dockerfile b/libc/ci/docker/arm-linux-androideabi/Dockerfile
index acc784e..544d167 100644
--- a/libc/ci/docker/arm-linux-androideabi/Dockerfile
+++ b/libc/ci/docker/arm-linux-androideabi/Dockerfile
@@ -9,7 +9,7 @@ RUN dpkg --add-architecture i386 && \
   python \
   unzip \
   expect \
-  openjdk-11-jre \
+  openjdk-8-jre \
   libstdc++6:i386 \
   libpulse0 \
   gcc \
diff --git a/libc/ci/docker/arm-unknown-linux-musleabihf/Dockerfile b/libc/ci/docker/arm-unknown-linux-musleabihf/Dockerfile
index e29e854..639b141 100644
--- a/libc/ci/docker/arm-unknown-linux-musleabihf/Dockerfile
+++ b/libc/ci/docker/arm-unknown-linux-musleabihf/Dockerfile
@@ -4,20 +4,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc make libc6-dev git curl ca-certificates \
   gcc-arm-linux-gnueabihf qemu-user
 
-RUN curl --retry 5 https://www.musl-libc.org/releases/musl-1.1.19.tar.gz | tar xzf -
-WORKDIR /musl-1.1.19
-RUN CC=arm-linux-gnueabihf-gcc \
-    CFLAGS="-march=armv6 -marm -mfpu=vfp" \
-    ./configure --prefix=/musl-arm --enable-wrapper=yes
-RUN make install -j4
-
-# Install linux kernel headers sanitized for use with musl
-RUN curl --retry 5 -L https://github.com/sabotage-linux/kernel-headers/archive/v3.12.6-6.tar.gz | \
-    tar xzf - && \
-    cd kernel-headers-3.12.6-6 && \
-    make ARCH=arm prefix=/musl-arm install -j4 && \
-    cd .. && \
-    rm -rf kernel-headers-3.12.6-6
+COPY install-musl.sh /
+RUN sh /install-musl.sh arm
 
 ENV PATH=$PATH:/musl-arm/bin:/rust/bin \
     CC_arm_unknown_linux_musleabihf=musl-gcc \
diff --git a/libc/ci/docker/i686-linux-android/Dockerfile b/libc/ci/docker/i686-linux-android/Dockerfile
index 59ea2d7..5403220 100644
--- a/libc/ci/docker/i686-linux-android/Dockerfile
+++ b/libc/ci/docker/i686-linux-android/Dockerfile
@@ -9,7 +9,7 @@ RUN dpkg --add-architecture i386 && \
   python \
   unzip \
   expect \
-  openjdk-11-jre \
+  openjdk-8-jre \
   libstdc++6:i386 \
   libpulse0 \
   gcc \
diff --git a/libc/ci/docker/i686-unknown-linux-musl/Dockerfile b/libc/ci/docker/i686-unknown-linux-musl/Dockerfile
index c085c10..ac76a32 100644
--- a/libc/ci/docker/i686-unknown-linux-musl/Dockerfile
+++ b/libc/ci/docker/i686-unknown-linux-musl/Dockerfile
@@ -4,28 +4,9 @@ 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 --retry 5 https://www.musl-libc.org/releases/musl-1.1.19.tar.gz | \
-    tar xzf - && \
-    cd musl-1.1.19 && \
-    CC=gcc CFLAGS=-m32 ./configure --prefix=/musl-i686 --disable-shared --target=i686 && \
-    make CROSS_COMPILE= install -j4 && \
-    cd .. && \
-    rm -rf musl-1.1.19
-# Install linux kernel headers sanitized for use with musl
-RUN curl --retry 5 -L https://github.com/sabotage-linux/kernel-headers/archive/v3.12.6-6.tar.gz | \
-    tar xzf - && \
-    cd kernel-headers-3.12.6-6 && \
-    make ARCH=i386 prefix=/musl-i686 install -j4 && \
-    cd .. && \
-    rm -rf kernel-headers-3.12.6-6
+
+COPY install-musl.sh /
+RUN sh /install-musl.sh i686
 
 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
index 9f1bcaf..c8623a5 100644
--- a/libc/ci/docker/mips-unknown-linux-gnu/Dockerfile
+++ b/libc/ci/docker/mips-unknown-linux-gnu/Dockerfile
@@ -3,7 +3,7 @@ FROM ubuntu:19.04
 RUN apt-get update && 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
+        qemu-system-mips linux-headers-generic
 
 ENV CARGO_TARGET_MIPS_UNKNOWN_LINUX_GNU_LINKER=mips-linux-gnu-gcc \
     CARGO_TARGET_MIPS_UNKNOWN_LINUX_GNU_RUNNER="qemu-mips -L /usr/mips-linux-gnu" \
diff --git a/libc/ci/docker/mips-unknown-linux-musl/Dockerfile b/libc/ci/docker/mips-unknown-linux-musl/Dockerfile
index 7f2764c..aee73be 100644
--- a/libc/ci/docker/mips-unknown-linux-musl/Dockerfile
+++ b/libc/ci/docker/mips-unknown-linux-musl/Dockerfile
@@ -9,7 +9,7 @@ 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 --retry 5 -L https://s3-us-west-1.amazonaws.com/rust-lang-ci2/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
+    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 \
diff --git a/libc/ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile b/libc/ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile
index b97cdb4..d4b972d 100644
--- a/libc/ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile
+++ b/libc/ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile
@@ -3,7 +3,7 @@ FROM ubuntu:19.04
 RUN apt-get update && 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
+        qemu-system-mips64 linux-headers-generic
 
 ENV CARGO_TARGET_MIPS64_UNKNOWN_LINUX_GNUABI64_LINKER=mips64-linux-gnuabi64-gcc \
     CARGO_TARGET_MIPS64_UNKNOWN_LINUX_GNUABI64_RUNNER="qemu-mips64 -L /usr/mips64-linux-gnuabi64" \
diff --git a/libc/ci/docker/mips64el-unknown-linux-gnuabi64/Dockerfile b/libc/ci/docker/mips64el-unknown-linux-gnuabi64/Dockerfile
index 7f79452..d0303da 100644
--- a/libc/ci/docker/mips64el-unknown-linux-gnuabi64/Dockerfile
+++ b/libc/ci/docker/mips64el-unknown-linux-gnuabi64/Dockerfile
@@ -3,7 +3,7 @@ FROM ubuntu:19.04
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \
         gcc-mips64el-linux-gnuabi64 libc6-dev-mips64el-cross \
-        qemu-system-mips64el
+        qemu-system-mips64el linux-headers-generic
 
 ENV CARGO_TARGET_MIPS64EL_UNKNOWN_LINUX_GNUABI64_LINKER=mips64el-linux-gnuabi64-gcc \
     CARGO_TARGET_MIPS64EL_UNKNOWN_LINUX_GNUABI64_RUNNER="qemu-mips64el -L /usr/mips64el-linux-gnuabi64" \
diff --git a/libc/ci/docker/wasm32-unknown-emscripten/Dockerfile b/libc/ci/docker/wasm32-unknown-emscripten/Dockerfile
index de8e353..c0ce825 100644
--- a/libc/ci/docker/wasm32-unknown-emscripten/Dockerfile
+++ b/libc/ci/docker/wasm32-unknown-emscripten/Dockerfile
@@ -3,11 +3,17 @@ FROM ubuntu:19.04
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
     ca-certificates \
+    g++ \
+    make \
+    file \
     curl \
     gcc \
     git \
     libc6-dev \
     python \
+    cmake \
+    sudo \
+    gdb \
     xz-utils
 
 COPY emscripten.sh /
diff --git a/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile b/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
index 0dbb191..bfa2b17 100644
--- a/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
+++ b/libc/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
@@ -1,5 +1,9 @@
 FROM ubuntu:19.04
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \
-  gcc libc6-dev ca-certificates
+  gcc libc6-dev ca-certificates linux-headers-generic
+
+RUN apt search linux-headers
+RUN ls /usr/src
+
 ENV PATH=$PATH:/rust/bin
diff --git a/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile b/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile
index 59164d2..06a081b 100644
--- a/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile
+++ b/libc/ci/docker/x86_64-unknown-linux-musl/Dockerfile
@@ -3,18 +3,8 @@ FROM ubuntu:19.04
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \
   gcc make libc6-dev git curl ca-certificates
-RUN curl --retry 5 https://www.musl-libc.org/releases/musl-1.1.19.tar.gz | \
-    tar xzf - && \
-    cd musl-1.1.19 && \
-    ./configure --prefix=/musl-x86_64 && \
-    make install -j4 && \
-    cd .. && \
-    rm -rf musl-1.1.19
-# Install linux kernel headers sanitized for use with musl
-RUN curl --retry 5 -L https://github.com/sabotage-linux/kernel-headers/archive/v3.12.6-6.tar.gz | \
-    tar xzf - && \
-    cd kernel-headers-3.12.6-6 && \
-    make ARCH=x86_64 prefix=/musl-x86_64 install -j4 && \
-    cd .. && \
-    rm -rf kernel-headers-3.12.6-6
+
+COPY install-musl.sh /
+RUN sh /install-musl.sh x86_64
+
 ENV PATH=$PATH:/musl-x86_64/bin:/rust/bin
diff --git a/libc/ci/emscripten-entry.sh b/libc/ci/emscripten-entry.sh
index e92c1cb..0016f56 100755
--- a/libc/ci/emscripten-entry.sh
+++ b/libc/ci/emscripten-entry.sh
@@ -15,6 +15,6 @@ set -ex
 source /emsdk-portable/emsdk_env.sh &> /dev/null
 
 # emsdk-portable provides a node binary, but we need version 8 to run wasm
-export PATH="/node-v8.0.0-linux-x64/bin:$PATH"
+export PATH="/node-v12.3.1-linux-x64/bin:$PATH"
 
 exec "$@"
diff --git a/libc/ci/emscripten.sh b/libc/ci/emscripten.sh
index ce3b541..db31323 100644
--- a/libc/ci/emscripten.sh
+++ b/libc/ci/emscripten.sh
@@ -34,8 +34,8 @@ curl --retry 5 -L https://s3.amazonaws.com/mozilla-games/emscripten/releases/ems
 
 cd /emsdk-portable
 ./emsdk update
-hide_output ./emsdk install sdk-1.37.20-64bit
-./emsdk activate sdk-1.37.20-64bit
+hide_output ./emsdk install sdk-1.38.15-64bit
+./emsdk activate sdk-1.38.15-64bit
 
 # Compile and cache libc
 # shellcheck disable=SC1091
@@ -51,6 +51,6 @@ chmod a+rxw -R /emsdk-portable
 
 # node 8 is required to run wasm
 cd /
-curl --retry 5 -L https://nodejs.org/dist/v8.0.0/node-v8.0.0-linux-x64.tar.xz | \
+curl --retry 5 -L https://nodejs.org/dist/v12.3.1/node-v12.3.1-linux-x64.tar.xz | \
     tar -xJ
 
diff --git a/libc/ci/install-musl.sh b/libc/ci/install-musl.sh
new file mode 100644
index 0000000..ab98c4f
--- /dev/null
+++ b/libc/ci/install-musl.sh
@@ -0,0 +1,69 @@
+#!/usr/bin/env sh
+#
+# Install musl and musl-sanitized linux kernel headers
+# to musl-{$1} directory
+
+set -ex
+
+MUSL_VERSION=1.1.22
+MUSL="musl-${MUSL_VERSION}"
+
+# Download, configure, build, and install musl:
+curl --retry 5 https://www.musl-libc.org/releases/${MUSL}.tar.gz | tar xzf -
+
+cd $MUSL
+case ${1} in
+    aarch64)
+        musl_arch=aarch64
+        kernel_arch=arm64
+        CC=aarch64-linux-gnu-gcc \
+          ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
+        make install -j4
+        ;;
+    arm)
+        musl_arch=arm
+        kernel_arch=arm
+        CC=arm-linux-gnueabihf-gcc CFLAGS="-march=armv6 -marm -mfpu=vfp" \
+          ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
+        make install -j4
+        ;;
+    i686)
+        # cross-compile musl for i686 using the system compiler on an x86_64
+        # system.
+        musl_arch=i686
+        kernel_arch=i386
+        # Specifically pass -m32 in CFLAGS and override CC when running
+        # ./configure, since otherwise the script will fail to find a compiler.
+        CC=gcc CFLAGS="-m32" \
+          ./configure --prefix="/musl-${musl_arch}" --disable-shared --target=i686
+        # unset CROSS_COMPILE when running make; otherwise the makefile will
+        # call the non-existent binary 'i686-ar'.
+        make CROSS_COMPILE= install -j4
+        ;;
+    x86_64)
+        musl_arch=x86_64
+        kernel_arch=x86_64
+        ./configure --prefix="/musl-${musl_arch}"
+        make install -j4
+        ;;
+    *)
+        echo "Unknown target arch: \"${1}\""
+        exit 1
+        ;;
+esac
+
+
+# shellcheck disable=SC2103
+cd ..
+rm -rf $MUSL
+
+# Download, configure, build, and install musl-sanitized kernel headers:
+KERNEL_HEADER_VER="4.4.2-2"
+curl --retry 5 -L \
+     "https://github.com/sabotage-linux/kernel-headers/archive/v${KERNEL_HEADER_VER}.tar.gz" | \
+    tar xzf -
+(
+    cd kernel-headers-${KERNEL_HEADER_VER}
+    make ARCH="${kernel_arch}" prefix="/musl-${musl_arch}" install -j4
+)
+rm -rf kernel-headers-${KERNEL_HEADER_VER}
diff --git a/libc/ci/run.sh b/libc/ci/run.sh
index 427d3bf..8c56979 100755
--- a/libc/ci/run.sh
+++ b/libc/ci/run.sh
@@ -87,10 +87,12 @@ if [ "$TARGET" = "x86_64-unknown-linux-gnux32" ]; then
   opt="--release"
 fi
 
-cargo test $opt --no-default-features --manifest-path libc-test/Cargo.toml \
+export LIBC_CI=1
+
+cargo test -vv $opt --no-default-features --manifest-path libc-test/Cargo.toml \
       --target "${TARGET}"
 
-cargo test $opt --manifest-path libc-test/Cargo.toml --target "${TARGET}"
+cargo test -vv $opt --manifest-path libc-test/Cargo.toml --target "${TARGET}"
 
-cargo test $opt --features extra_traits --manifest-path libc-test/Cargo.toml \
+cargo test -vv $opt --features extra_traits --manifest-path libc-test/Cargo.toml \
       --target "${TARGET}"
diff --git a/libc/ci/test-runner-linux b/libc/ci/test-runner-linux
index 569fa00..cad31ec 100755
--- a/libc/ci/test-runner-linux
+++ b/libc/ci/test-runner-linux
@@ -5,15 +5,6 @@ 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