Auto merge of #1127 - gnzlbg:fmt, r=gnzlbg

Formatting and shellcheck

16 files changed, 400 insertions, 320 deletions

diff --git a/.travis.yml b/.travis.yml
index d5982e6e4d..2e7f548a03 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,43 +2,30 @@ language: rust
 rust: stable
 sudo: required
 dist: trusty
-services:
-  - docker
-install:
-  - if [ -z "$NO_ADD" ]; then rustup target add $TARGET; fi
-script:
-  - cargo build $OPT
-  - cargo build $OPT --no-default-features
-  - cargo generate-lockfile --manifest-path libc-test/Cargo.toml
-  - if [[ $TRAVIS_OS_NAME = "linux" ]]; then
-      sh ci/run-docker.sh $TARGET;
-    else
-      export CARGO_TARGET_DIR=`pwd`/target;
-      sh ci/run.sh $TARGET;
-    fi
-  - rustc ci/style.rs && ./style src
-env:
-  global:
-    secure: "e2/3QjgRN9atOuSHp22TrYG7QVKcYUWY48Hi9b60w+r1+BhPkTseIJLte7WefRhdXtqpjjUJTooKDhnurFOeHaCT+nmBgiv+FPU893sBl4bhesY4m0vgUJVbNZcs6lTImYekWVb+aqjGdgV/XAgCw7c3kPmrZV0MzGDWL64Xaps="
+services: docker
+
 matrix:
   include:
     # 1.13.0 compat
-    - env: TARGET=x86_64-unknown-linux-gnu NO_ADD=1
+    - env: TARGET=x86_64-unknown-linux-gnu
       rust: 1.13.0
       script: rm -f Cargo.lock && cargo build
-      install:
+      install: true
 
     # build documentation
-    - env: TARGET=x86_64-unknown-linux-gnu NO_ADD=1
+    - env: TARGET=x86_64-unknown-linux-gnu
       rust: nightly
       script: sh ci/dox.sh
+      install: true
 
     # stable compat
-    - env: TARGET=x86_64-unknown-linux-gnu NO_ADD=1
+    - env: TARGET=x86_64-unknown-linux-gnu
+      install: true
     - env: TARGET=i686-unknown-linux-gnu
     - os: osx
-      env: TARGET=x86_64-apple-darwin NO_ADD=1
+      env: TARGET=x86_64-apple-darwin
       osx_image: xcode10
+      install: true
     - os: osx
       env: TARGET=i686-apple-darwin
       osx_image: xcode10
@@ -67,20 +54,24 @@ matrix:
     - env: TARGET=wasm32-unknown-emscripten
 
     # beta
-    - env: TARGET=x86_64-unknown-linux-gnu NO_ADD=1
+    - env: TARGET=x86_64-unknown-linux-gnu
       rust: beta
+      install: true
     - os: osx
-      env: TARGET=x86_64-apple-darwin NO_ADD=1
+      env: TARGET=x86_64-apple-darwin
       osx_image: xcode10
       rust: beta
+      install: true
 
     # nightly
-    - env: TARGET=x86_64-unknown-linux-gnu NO_ADD=1
+    - env: TARGET=x86_64-unknown-linux-gnu
       rust: nightly
+      install: true
     - os: osx
-      env: TARGET=x86_64-apple-darwin NO_ADD=1
+      env: TARGET=x86_64-apple-darwin
       osx_image: xcode10
       rust: nightly
+      install: true
     # not available on stable
     # without --release the build fails
     # see https://github.com/rust-lang/rust/issues/45417
@@ -90,6 +81,26 @@ matrix:
     # QEMU based targets that compile in an emulator
     - env: TARGET=x86_64-unknown-freebsd
 
+    - name: "Shellcheck"
+      install: true
+      script:
+        - shellcheck --version
+        - shellcheck ci/*.sh
+
+install: rustup target add $TARGET
+script:
+  - cargo generate-lockfile --manifest-path libc-test/Cargo.toml
+  - if [[ $TRAVIS_OS_NAME = "linux" ]]; then
+      sh ci/run-docker.sh $TARGET;
+    else
+      export CARGO_TARGET_DIR=`pwd`/target;
+      sh ci/run.sh $TARGET;
+    fi
+  - rustc ci/style.rs && ./style src
+env:
+  global:
+    secure: "e2/3QjgRN9atOuSHp22TrYG7QVKcYUWY48Hi9b60w+r1+BhPkTseIJLte7WefRhdXtqpjjUJTooKDhnurFOeHaCT+nmBgiv+FPU893sBl4bhesY4m0vgUJVbNZcs6lTImYekWVb+aqjGdgV/XAgCw7c3kPmrZV0MzGDWL64Xaps="
+
 notifications:
   email:
     on_success: never
diff --git a/ci/android-install-ndk.sh b/ci/android-install-ndk.sh
index 873f6c52c8..4a5fbc0ba1 100644
--- a/ci/android-install-ndk.sh
+++ b/ci/android-install-ndk.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env 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.
@@ -30,8 +30,8 @@ esac;
 
 android-ndk-r15b/build/tools/make_standalone_toolchain.py \
         --unified-headers \
-        --install-dir /android/ndk-$1 \
-        --arch $arch \
+        --install-dir "/android/ndk-${1}" \
+        --arch "${arch}" \
         --api 24
 
 rm -rf ./android-ndk-r15b-linux-x86_64.zip ./android-ndk-r15b
diff --git a/ci/android-install-sdk.sh b/ci/android-install-sdk.sh
index ab7e14d95b..e43cbc3a6b 100644
--- a/ci/android-install-sdk.sh
+++ b/ci/android-install-sdk.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env 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.
@@ -56,5 +56,5 @@ echo "yes" | \
 
 echo "no" |
     ./sdk/tools/bin/avdmanager create avd \
-        --name $1 \
+        --name "${1}" \
         --package "system-images;android-24;default;$abi"
diff --git a/ci/android-sysimage.sh b/ci/android-sysimage.sh
index 9611dfeb0d..1a6c49d2d4 100644
--- a/ci/android-sysimage.sh
+++ b/ci/android-sysimage.sh
@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 # 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.
@@ -13,32 +15,34 @@ set -ex
 URL=https://dl.google.com/android/repository/sys-img/android
 
 main() {
-    local arch=$1
-    local name=$2
+    local arch="${1}"
+    local name="${2}"
     local dest=/system
-    local td=$(mktemp -d)
+    local td
+    td="$(mktemp -d)"
 
     apt-get install --no-install-recommends e2tools
 
-    pushd $td
-    curl -O $URL/$name
-    unzip -q $name
+    pushd "${td}"
+    curl -O "${URL}/${name}"
+    unzip -q "${name}"
 
-    local system=$(find . -name system.img)
-    mkdir -p $dest/{bin,lib,lib64}
+    local system
+    system="$(find . -name system.img)"
+    mkdir -p ${dest}/{bin,lib,lib64}
 
     # Extract android linker and libraries to /system
     # This allows android executables to be run directly (or with qemu)
-    if [ $arch = "x86_64" -o $arch = "arm64" ]; then
-        e2cp -p $system:/bin/linker64 $dest/bin/
-        e2cp -p $system:/lib64/libdl.so $dest/lib64/
-        e2cp -p $system:/lib64/libc.so $dest/lib64/
-        e2cp -p $system:/lib64/libm.so $dest/lib64/
+    if [ "${arch}" = "x86_64" ] || [ "${arch}" = "arm64" ]; then
+        e2cp -p "${system}:/bin/linker64" "${dest}/bin/"
+        e2cp -p "${system}:/lib64/libdl.so" "${dest}/lib64/"
+        e2cp -p "${system}:/lib64/libc.so" "${dest}/lib64/"
+        e2cp -p "${system}:/lib64/libm.so" "${dest}/lib64/"
     else
-        e2cp -p $system:/bin/linker $dest/bin/
-        e2cp -p $system:/lib/libdl.so $dest/lib/
-        e2cp -p $system:/lib/libc.so $dest/lib/
-        e2cp -p $system:/lib/libm.so $dest/lib/
+        e2cp -p "${system}:/bin/linker" "${dest}/bin/"
+        e2cp -p "${system}:/lib/libdl.so" "${dest}/lib/"
+        e2cp -p "${system}:/lib/libc.so" "${dest}/lib/"
+        e2cp -p "${system}:/lib/libm.so" "${dest}/lib/"
     fi
 
     # clean up
@@ -46,7 +50,7 @@ main() {
 
     popd
 
-    rm -rf $td
+    rm -rf "${td}"
 }
 
 main "${@}"
diff --git a/ci/dox.sh b/ci/dox.sh
index b8ffa7dd0d..521743e399 100644
--- a/ci/dox.sh
+++ b/ci/dox.sh
@@ -1,12 +1,12 @@
-#!/bin/sh
+#!/usr/bin/env 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
+set -ex
 
-TARGETS=`grep html_root_url src/lib.rs | sed 's/.*".*\/\(.*\)"/\1/'`
+TARGETS=$(grep html_root_url src/lib.rs | sed 's/.*".*\/\(.*\)"/\1/'| sed 's/)//')
 
 rm -rf target/doc
 mkdir -p target/doc
@@ -14,12 +14,12 @@ mkdir -p target/doc
 cp ci/landing-page-head.html target/doc/index.html
 
 for target in $TARGETS; do
-  echo documenting $target
+  echo "documenting ${target}"
 
-  rustdoc -o target/doc/$target --target $target src/lib.rs --cfg cross_platform_docs \
+  rustdoc -o "target/doc/${target}" --target "${target}" src/lib.rs --cfg cross_platform_docs \
     --crate-name libc
 
-  echo "<li><a href="/libc/$target/libc/index.html">$target</a></li>" \
+  echo "<li><a href=\"/libc/${target}/libc/index.html\">${target}</a></li>" \
     >> target/doc/index.html
 done
 
@@ -28,6 +28,6 @@ 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/${TRAVIS_REPO_SLUG}.git gh-pages
+  "${HOME}/.local/bin/ghp-import" -n target/doc
+  git push -qf "https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git" gh-pages
 fi
diff --git a/ci/emscripten-entry.sh b/ci/emscripten-entry.sh
index 22ae8b08a3..e92c1cb1bf 100755
--- a/ci/emscripten-entry.sh
+++ b/ci/emscripten-entry.sh
@@ -11,6 +11,7 @@
 
 set -ex
 
+# shellcheck disable=SC1091
 source /emsdk-portable/emsdk_env.sh &> /dev/null
 
 # emsdk-portable provides a node binary, but we need version 8 to run wasm
diff --git a/ci/emscripten.sh b/ci/emscripten.sh
index d80258584d..ab69aa7514 100644
--- a/ci/emscripten.sh
+++ b/ci/emscripten.sh
@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 # 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.
@@ -17,10 +18,10 @@ echo ERROR: An error was encountered with the build.
 cat /tmp/build.log
 exit 1
 "
-  trap "$on_err" ERR
+  trap '$on_err' ERR
   bash -c "while true; do sleep 30; echo \$(date) - building ...; done" &
   PING_LOOP_PID=$!
-  $@ &> /tmp/build.log
+  "${@}" &> /tmp/build.log
   trap - ERR
   kill $PING_LOOP_PID
   rm -f /tmp/build.log
@@ -37,6 +38,7 @@ hide_output ./emsdk install sdk-1.37.20-64bit
 ./emsdk activate sdk-1.37.20-64bit
 
 # Compile and cache libc
+# shellcheck disable=SC1091
 source ./emsdk_env.sh
 echo "main(){}" > a.c
 HOME=/emsdk-portable/ emcc a.c
diff --git a/ci/linux-s390x.sh b/ci/linux-s390x.sh
index 972abeec56..95cb798ac4 100644
--- a/ci/linux-s390x.sh
+++ b/ci/linux-s390x.sh
@@ -1,3 +1,5 @@
+#!/usr/bin/env sh
+
 set -ex
 
 mkdir -m 777 /qemu
diff --git a/ci/linux-sparc64.sh b/ci/linux-sparc64.sh
index 4452b120e1..69c405b879 100644
--- a/ci/linux-sparc64.sh
+++ b/ci/linux-sparc64.sh
@@ -1,3 +1,5 @@
+#!/usr/bin/env sh
+
 set -ex
 
 mkdir -m 777 /qemu
diff --git a/ci/run-docker.sh b/ci/run-docker.sh
index 662a1d491a..4247827f67 100755
--- a/ci/run-docker.sh
+++ b/ci/run-docker.sh
@@ -1,36 +1,41 @@
+#!/usr/bin/env sh
+
 # Small script to run tests for a target (or all targets) inside all the
 # respective docker images.
 
 set -ex
 
 run() {
-    echo $1
+    echo "Building docker container for target ${1}"
     # use -f so we can use ci/ as build context
-    docker build -t libc -f ci/docker/$1/Dockerfile ci/
+    docker build -t libc -f "ci/docker/${1}/Dockerfile" ci/
     mkdir -p target
     if [ -w /dev/kvm ]; then
-      kvm="--volume /dev/kvm:/dev/kvm"
+        kvm="--volume /dev/kvm:/dev/kvm"
+    else
+        kvm=""
     fi
+
     docker run \
-      --user `id -u`:`id -g` \
+      --user "$(id -u)":"$(id -g)" \
       --rm \
       --init \
-      --volume $HOME/.cargo:/cargo \
+      --volume "${HOME}/.cargo":/cargo \
       $kvm \
       --env CARGO_HOME=/cargo \
-      --volume `rustc --print sysroot`:/rust:ro \
-      --volume `pwd`:/checkout:ro \
-      --volume `pwd`/target:/checkout/target \
+      --volume "$(rustc --print sysroot)":/rust:ro \
+      --volume "$(pwd)":/checkout:ro \
+      --volume "$(pwd)"/target:/checkout/target \
       --env CARGO_TARGET_DIR=/checkout/target \
       --workdir /checkout \
       libc \
-      ci/run.sh $1
+      ci/run.sh "${1}"
 }
 
-if [ -z "$1" ]; then
-  for d in `ls ci/docker/`; do
-    run $d
+if [ -z "${1}" ]; then
+  for d in ci/docker/*; do
+    run "${d}"
   done
 else
-  run $1
+  run "${1}"
 fi
diff --git a/ci/run-qemu.sh b/ci/run-qemu.sh
index b2f457df91..6fba629876 100644
--- a/ci/run-qemu.sh
+++ b/ci/run-qemu.sh
@@ -1,3 +1,5 @@
+#!/usr/bin/env sh
+
 # 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.
@@ -10,11 +12,11 @@
 
 set -ex
 
-ROOT=$1
-cp -r $ROOT/libc /tmp/libc
+ROOT="${1}"
+cp -r "${ROOT}/libc" /tmp/libc
 cd /tmp/libc
 
-TARGET=$(cat $ROOT/TARGET)
+TARGET="$(cat "${ROOT}/TARGET")"
 export CARGO_TARGET_DIR=/tmp
 
 case $TARGET in
@@ -24,9 +26,9 @@ case $TARGET in
     ;;
 
   *)
-    echo "Unknown target: $TARGET"
+    echo "Unknown target: ${TARGET}"
     exit 1
     ;;
 esac
 
-exec sh ci/run.sh $TARGET
+exec sh ci/run.sh "${TARGET}"
diff --git a/ci/run.sh b/ci/run.sh
index 27ffc054a0..2140da68e2 100755
--- a/ci/run.sh
+++ b/ci/run.sh
@@ -1,11 +1,11 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 # Builds and runs tests for a particular target passed as an argument to this
 # script.
 
 set -ex
 
-TARGET=$1
+TARGET="${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
@@ -15,52 +15,53 @@ TARGET=$1
 # script from the second which we place inside.
 if [ "$QEMU" != "" ]; then
   tmpdir=/tmp/qemu-img-creation
-  mkdir -p $tmpdir
+  mkdir -p "${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-us-west-1.amazonaws.com/rust-lang-ci2/libc/$QEMU | \
-        gunzip -d > $tmpdir/$qemufile
+    qemufile="$(echo "${QEMU%.gz}" | sed 's/\//__/g')"
+    if [ ! -f "${tmpdir}/${qemufile}" ]; then
+      curl "https://s3-us-west-1.amazonaws.com/rust-lang-ci2/libc/${QEMU}" | \
+          gunzip -d > "${tmpdir}/${qemufile}"
     fi
   elif [ -z "${QEMU#*.xz}" ]; then
     # image is .xz : download and uncompress it
-    qemufile=$(echo ${QEMU%.xz} | sed 's/\//__/g')
-    if [ ! -f $tmpdir/$qemufile ]; then
-      curl https://s3-us-west-1.amazonaws.com/rust-lang-ci2/libc/$QEMU | \
-        unxz > $tmpdir/$qemufile
+    qemufile="$(echo "${QEMU%.xz}" | sed 's/\//__/g')"
+    if [ ! -f "${tmpdir}/${qemufile}" ]; then
+      curl "https://s3-us-west-1.amazonaws.com/rust-lang-ci2/libc/${QEMU}" | \
+          unxz > "${tmpdir}/${qemufile}"
     fi
   else
     # plain qcow2 image: just download it
-    qemufile=$(echo ${QEMU} | sed 's/\//__/g')
-    if [ ! -f $tmpdir/$qemufile ]; then
-      curl https://s3-us-west-1.amazonaws.com/rust-lang-ci2/libc/$QEMU \
-        > $tmpdir/$qemufile
+    qemufile="$(echo "${QEMU}" | sed 's/\//__/g')"
+    if [ ! -f "${tmpdir}/${qemufile}" ]; then
+      curl "https://s3-us-west-1.amazonaws.com/rust-lang-ci2/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 $tmpdir/mount
+  rm -f "${tmpdir}/libc-test.img"
+  mkdir "${tmpdir}/mount"
 
   # Do the standard rigamarole of cross-compiling an executable and then the
   # script to run just executes the binary.
   cargo build \
     --manifest-path libc-test/Cargo.toml \
-    --target $TARGET \
+    --target "${TARGET}" \
     --test main
-  rm $CARGO_TARGET_DIR/$TARGET/debug/main-*.d
-  cp $CARGO_TARGET_DIR/$TARGET/debug/main-* $tmpdir/mount/libc-test
-  echo 'exec $1/libc-test' > $tmpdir/mount/run.sh
+  rm "${CARGO_TARGET_DIR}/${TARGET}"/debug/main-*.d
+  cp "${CARGO_TARGET_DIR}/${TARGET}"/debug/main-* "${tmpdir}"/mount/libc-test
+  # shellcheck disable=SC2016
+  echo 'exec $1/libc-test' > "${tmpdir}/mount/run.sh"
 
-  du -sh $tmpdir/mount
+  du -sh "${tmpdir}/mount"
   genext2fs \
-      --root $tmpdir/mount \
+      --root "${tmpdir}/mount" \
       --size-in-blocks 100000 \
-      $tmpdir/libc-test.img
+      "${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,
@@ -70,13 +71,13 @@ if [ "$QEMU" != "" ]; then
   qemu-system-x86_64 \
     -m 1024 \
     -snapshot \
-    -drive if=virtio,file=$tmpdir/$qemufile \
-    -drive if=virtio,file=$tmpdir/libc-test.img \
+    -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" $CARGO_TARGET_DIR/out.log
+    -vga none 2>&1 | tee "${CARGO_TARGET_DIR}/out.log"
+  exec grep "^PASSED .* tests" "${CARGO_TARGET_DIR}/out.log"
 fi
 
 # FIXME: x86_64-unknown-linux-gnux32 fail to compile without --release
@@ -89,10 +90,10 @@ 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
+  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 $TARGET
+if [ "$(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
+exec cargo test $opt --manifest-path libc-test/Cargo.toml --target "${TARGET}"
diff --git a/libc-test/build.rs b/libc-test/build.rs
index 6723b2723a..90c5640ba1 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -51,17 +51,17 @@ fn main() {
     }
 
     cfg.header("errno.h")
-       .header("fcntl.h")
-       .header("limits.h")
-       .header("locale.h")
-       .header("stddef.h")
-       .header("stdint.h")
-       .header("stdio.h")
-       .header("stdlib.h")
-       .header("sys/stat.h")
-       .header("sys/types.h")
-       .header("time.h")
-       .header("wchar.h");
+        .header("fcntl.h")
+        .header("limits.h")
+        .header("locale.h")
+        .header("stddef.h")
+        .header("stdint.h")
+        .header("stdio.h")
+        .header("stdlib.h")
+        .header("sys/stat.h")
+        .header("sys/types.h")
+        .header("time.h")
+        .header("wchar.h");
 
     if windows {
         cfg.header("winsock2.h"); // must be before windows.h
@@ -157,7 +157,6 @@ fn main() {
         }
 
         if !musl && !uclibc {
-
             if !netbsd && !openbsd && !uclibc {
                 cfg.header("execinfo.h");
             }
@@ -355,20 +354,9 @@ fn main() {
     cfg.type_name(move |ty, is_struct, is_union| {
         match ty {
             // Just pass all these through, no need for a "struct" prefix
-            "FILE" |
-            "fd_set" |
-            "Dl_info" |
-            "DIR" |
-            "Elf32_Phdr" |
-            "Elf64_Phdr" |
-            "Elf32_Shdr" |
-            "Elf64_Shdr" |
-            "Elf32_Sym" |
-            "Elf64_Sym" |
-            "Elf32_Ehdr" |
-            "Elf64_Ehdr" |
-            "Elf32_Chdr" |
-            "Elf64_Chdr" => ty.to_string(),
+            "FILE" | "fd_set" | "Dl_info" | "DIR" | "Elf32_Phdr" | "Elf64_Phdr" | "Elf32_Shdr"
+            | "Elf64_Shdr" | "Elf32_Sym" | "Elf64_Sym" | "Elf32_Ehdr" | "Elf64_Ehdr"
+            | "Elf32_Chdr" | "Elf64_Chdr" => ty.to_string(),
 
             // Fixup a few types on windows that don't actually exist.
             "time64_t" if windows => "__time64_t".to_string(),
@@ -377,9 +365,7 @@ fn main() {
             // OSX calls this something else
             "sighandler_t" if bsdlike => "sig_t".to_string(),
 
-            t if is_union => {
-                format!("union {}", t)
-            }
+            t if is_union => format!("union {}", t),
 
             t if t.ends_with("_t") => t.to_string(),
 
@@ -405,7 +391,7 @@ fn main() {
     let target2 = target.clone();
     cfg.field_name(move |struct_, field| {
         match field {
-            "st_birthtime"      if openbsd && struct_ == "stat" => "__st_birthtime".to_string(),
+            "st_birthtime" if openbsd && struct_ == "stat" => "__st_birthtime".to_string(),
             "st_birthtime_nsec" if openbsd && struct_ == "stat" => "__st_birthtimensec".to_string(),
             // Our stat *_nsec fields normally don't actually exist but are part
             // of a timeval struct
@@ -419,9 +405,15 @@ fn main() {
                 }
             }
             "u64" if struct_ == "epoll_event" => "data.u64".to_string(),
-            "type_" if (linux || freebsd || dragonfly) &&
-                (struct_ == "input_event" || struct_ == "input_mask" ||
-                 struct_ == "ff_effect" || struct_ == "rtprio") => "type".to_string(),
+            "type_"
+                if (linux || freebsd || dragonfly)
+                    && (struct_ == "input_event"
+                        || struct_ == "input_mask"
+                        || struct_ == "ff_effect"
+                        || struct_ == "rtprio") =>
+            {
+                "type".to_string()
+            }
             s => s.to_string(),
         }
     });
@@ -431,7 +423,7 @@ fn main() {
             // sighandler_t is crazy across platforms
             "sighandler_t" => true,
 
-            _ => false
+            _ => false,
         }
     });
 
@@ -467,25 +459,20 @@ fn main() {
 
             // Present on historical versions of iOS but missing in more recent
             // SDKs
-            "bpf_hdr" |
-            "proc_taskinfo" |
-            "proc_taskallinfo" |
-            "proc_bsdinfo" |
-            "proc_threadinfo" |
-            "sockaddr_inarp" |
-            "sockaddr_ctl" |
-            "arphdr" if ios => true,
+            "bpf_hdr" | "proc_taskinfo" | "proc_taskallinfo" | "proc_bsdinfo"
+            | "proc_threadinfo" | "sockaddr_inarp" | "sockaddr_ctl" | "arphdr"
+                if ios =>
+            {
+                true
+            }
 
-            _ => false
+            _ => false,
         }
     });
 
     cfg.skip_signededness(move |c| {
         match c {
-            "LARGE_INTEGER" |
-            "mach_timebase_info_data_t" |
-            "float" |
-            "double" => true,
+            "LARGE_INTEGER" | "mach_timebase_info_data_t" | "float" | "double" => true,
             // uuid_t is a struct, not an integer.
             "uuid_t" if dragonfly => true,
             n if n.starts_with("pthread") => true,
@@ -495,8 +482,7 @@ fn main() {
             "mqd_t" if freebsd || dragonfly => true,
 
             // Just some typedefs on osx, no need to check their sign
-            "posix_spawnattr_t" |
-            "posix_spawn_file_actions_t" => true,
+            "posix_spawnattr_t" | "posix_spawn_file_actions_t" => true,
 
             // windows-isms
             n if n.starts_with("P") => true,
@@ -509,25 +495,26 @@ fn main() {
     cfg.skip_const(move |name| {
         match name {
             // Apparently these don't exist in mingw headers?
-            "MEM_RESET_UNDO" |
-            "FILE_ATTRIBUTE_NO_SCRUB_DATA" |
-            "FILE_ATTRIBUTE_INTEGRITY_STREAM" |
-            "ERROR_NOTHING_TO_TERMINATE" if mingw => true,
+            "MEM_RESET_UNDO"
+            | "FILE_ATTRIBUTE_NO_SCRUB_DATA"
+            | "FILE_ATTRIBUTE_INTEGRITY_STREAM"
+            | "ERROR_NOTHING_TO_TERMINATE"
+                if mingw =>
+            {
+                true
+            }
 
-            "SIG_DFL" |
-            "SIG_ERR" |
-            "SIG_IGN" => true, // sighandler_t weirdness
-            "SIGUNUSED" => true, // removed in glibc 2.26
+            "SIG_DFL" | "SIG_ERR" | "SIG_IGN" => true, // sighandler_t weirdness
+            "SIGUNUSED" => true,                       // removed in glibc 2.26
 
             // types on musl are defined a little differently
             n if musl && n.contains("__SIZEOF_PTHREAD") => true,
 
             // Skip constants not defined in MUSL but just passed down to the
             // kernel regardless
-            "RLIMIT_NLIMITS" |
-            "TCP_COOKIE_TRANSACTIONS" |
-            "RLIMIT_RTTIME" |
-            "MSG_COPY" if musl => true,
+            "RLIMIT_NLIMITS" | "TCP_COOKIE_TRANSACTIONS" | "RLIMIT_RTTIME" | "MSG_COPY" if musl => {
+                true
+            }
             // work around super old mips toolchain
             "SCHED_IDLE" | "SHM_NORESERVE" => mips,
 
@@ -536,30 +523,27 @@ fn main() {
             "MS_RMT_MASK" => true, // updated in glibc 2.22 and musl 1.1.13
 
             // These OSX constants are flagged as deprecated
-            "NOTE_EXIT_REPARENTED" |
-            "NOTE_REAP" if apple => true,
+            "NOTE_EXIT_REPARENTED" | "NOTE_REAP" if apple => true,
 
             // These constants were removed in FreeBSD 11 (svn r273250) but will
             // still be accepted and ignored at runtime.
-            "MAP_RENAME" |
-            "MAP_NORESERVE" if freebsd => true,
+            "MAP_RENAME" | "MAP_NORESERVE" if freebsd => true,
 
             // These constants were removed in FreeBSD 11 (svn r262489),
             // and they've never had any legitimate use outside of the
             // base system anyway.
-            "CTL_MAXID" |
-            "KERN_MAXID" |
-            "HW_MAXID" |
-            "NET_MAXID" |
-            "USER_MAXID" if freebsd => true,
+            "CTL_MAXID" | "KERN_MAXID" | "HW_MAXID" | "NET_MAXID" | "USER_MAXID" if freebsd => true,
 
             // These constants were added in FreeBSD 11
-            "EVFILT_PROCDESC" | "EVFILT_SENDFILE" | "EVFILT_EMPTY" |
-            "PD_CLOEXEC" | "PD_ALLOWED_AT_FORK" if freebsd => true,
+            "EVFILT_PROCDESC" | "EVFILT_SENDFILE" | "EVFILT_EMPTY" | "PD_CLOEXEC"
+            | "PD_ALLOWED_AT_FORK"
+                if freebsd =>
+            {
+                true
+            }
 
             // These constants were added in FreeBSD 12
-            "SF_USER_READAHEAD" |
-            "SO_REUSEPORT_LB" if freebsd => true,
+            "SF_USER_READAHEAD" | "SO_REUSEPORT_LB" if freebsd => true,
 
             // These OSX constants are removed in Sierra.
             // https://developer.apple.com/library/content/releasenotes/General/APIDiffsMacOS10_12/Swift/Darwin.html
@@ -568,18 +552,43 @@ fn main() {
 
             // These constants were removed in OpenBSD 6 (https://git.io/v7gBO
             // https://git.io/v7gBq)
-            "KERN_USERMOUNT" |
-            "KERN_ARND" if openbsd => true,
+            "KERN_USERMOUNT" | "KERN_ARND" if openbsd => true,
 
             // These are either unimplemented or optionally built into uClibc
-            "LC_CTYPE_MASK" | "LC_NUMERIC_MASK" | "LC_TIME_MASK" | "LC_COLLATE_MASK" | "LC_MONETARY_MASK" | "LC_MESSAGES_MASK" |
-            "MADV_MERGEABLE" | "MADV_UNMERGEABLE" | "MADV_HWPOISON" | "IPV6_ADD_MEMBERSHIP" | "IPV6_DROP_MEMBERSHIP" | "IPV6_MULTICAST_LOOP" | "IPV6_V6ONLY" |
-            "MAP_STACK" | "RTLD_DEEPBIND" | "SOL_IPV6" | "SOL_ICMPV6" if uclibc => true,
+            "LC_CTYPE_MASK"
+            | "LC_NUMERIC_MASK"
+            | "LC_TIME_MASK"
+            | "LC_COLLATE_MASK"
+            | "LC_MONETARY_MASK"
+            | "LC_MESSAGES_MASK"
+            | "MADV_MERGEABLE"
+            | "MADV_UNMERGEABLE"
+            | "MADV_HWPOISON"
+            | "IPV6_ADD_MEMBERSHIP"
+            | "IPV6_DROP_MEMBERSHIP"
+            | "IPV6_MULTICAST_LOOP"
+            | "IPV6_V6ONLY"
+            | "MAP_STACK"
+            | "RTLD_DEEPBIND"
+            | "SOL_IPV6"
+            | "SOL_ICMPV6"
+                if uclibc =>
+            {
+                true
+            }
 
             // Musl uses old, patched kernel headers
-            "FALLOC_FL_COLLAPSE_RANGE" | "FALLOC_FL_ZERO_RANGE" |
-            "FALLOC_FL_INSERT_RANGE" | "FALLOC_FL_UNSHARE_RANGE" |
-            "RENAME_NOREPLACE" | "RENAME_EXCHANGE" | "RENAME_WHITEOUT" if musl => true,
+            "FALLOC_FL_COLLAPSE_RANGE"
+            | "FALLOC_FL_ZERO_RANGE"
+            | "FALLOC_FL_INSERT_RANGE"
+            | "FALLOC_FL_UNSHARE_RANGE"
+            | "RENAME_NOREPLACE"
+            | "RENAME_EXCHANGE"
+            | "RENAME_WHITEOUT"
+                if musl =>
+            {
+                true
+            }
 
             // Both android and musl use old kernel headers
             // These are constants used in getrandom syscall
@@ -610,7 +619,11 @@ fn main() {
 
             "MFD_CLOEXEC" | "MFD_ALLOW_SEALING" if !mips && musl => true,
 
-            "DT_FIFO" | "DT_CHR" | "DT_DIR" | "DT_BLK" | "DT_REG" | "DT_LNK" | "DT_SOCK" if solaris => true,
+            "DT_FIFO" | "DT_CHR" | "DT_DIR" | "DT_BLK" | "DT_REG" | "DT_LNK" | "DT_SOCK"
+                if solaris =>
+            {
+                true
+            }
             "USRQUOTA" | "GRPQUOTA" if solaris => true,
             "PRIO_MIN" | "PRIO_MAX" if solaris => true,
 
@@ -624,21 +637,25 @@ fn main() {
 
             // Present on historical versions of iOS, but now removed in more
             // recent SDKs
-            "ARPOP_REQUEST" |
-            "ARPOP_REPLY" |
-            "ATF_COM" |
-            "ATF_PERM" |
-            "ATF_PUBL" |
-            "ATF_USETRAILERS" |
-            "AF_SYS_CONTROL" |
-            "SYSPROTO_EVENT" |
-            "PROC_PIDTASKALLINFO" |
-            "PROC_PIDTASKINFO" |
-            "PROC_PIDTHREADINFO" |
-            "UTUN_OPT_FLAGS" |
-            "UTUN_OPT_IFNAME" |
-            "BPF_ALIGNMENT" |
-            "SYSPROTO_CONTROL" if ios => true,
+            "ARPOP_REQUEST"
+            | "ARPOP_REPLY"
+            | "ATF_COM"
+            | "ATF_PERM"
+            | "ATF_PUBL"
+            | "ATF_USETRAILERS"
+            | "AF_SYS_CONTROL"
+            | "SYSPROTO_EVENT"
+            | "PROC_PIDTASKALLINFO"
+            | "PROC_PIDTASKINFO"
+            | "PROC_PIDTHREADINFO"
+            | "UTUN_OPT_FLAGS"
+            | "UTUN_OPT_IFNAME"
+            | "BPF_ALIGNMENT"
+            | "SYSPROTO_CONTROL"
+                if ios =>
+            {
+                true
+            }
             s if ios && s.starts_with("RTF_") => true,
             s if ios && s.starts_with("RTM_") => true,
             s if ios && s.starts_with("RTA_") => true,
@@ -865,8 +882,8 @@ fn main() {
     // fails on a lot of platforms.
     let mut cfg = ctest::TestGenerator::new();
     cfg.skip_type(|_| true)
-       .skip_fn(|_| true)
-       .skip_static(|_| true);
+        .skip_fn(|_| true)
+        .skip_static(|_| true);
     if android || linux {
         // musl defines these directly in `fcntl.h`
         if musl {
@@ -880,24 +897,18 @@ fn main() {
         }
         cfg.header("linux/quota.h");
         cfg.header("asm/termbits.h");
-        cfg.skip_const(move |name| {
-            match name {
-                "F_CANCELLK" | "F_ADD_SEALS" | "F_GET_SEALS" => false,
-                "F_SEAL_SEAL" | "F_SEAL_SHRINK" | "F_SEAL_GROW" | "F_SEAL_WRITE" => false,
-                "QFMT_VFS_OLD" | "QFMT_VFS_V0" | "QFMT_VFS_V1" if mips && linux => false,
-                "BOTHER" => false,
-                _ => true,
-            }
-        });
-        cfg.skip_struct(|s| {
-            s != "termios2"
+        cfg.skip_const(move |name| match name {
+            "F_CANCELLK" | "F_ADD_SEALS" | "F_GET_SEALS" => false,
+            "F_SEAL_SEAL" | "F_SEAL_SHRINK" | "F_SEAL_GROW" | "F_SEAL_WRITE" => false,
+            "QFMT_VFS_OLD" | "QFMT_VFS_V0" | "QFMT_VFS_V1" if mips && linux => false,
+            "BOTHER" => false,
+            _ => true,
         });
-        cfg.type_name(move |ty, is_struct, is_union| {
-            match ty {
-                t if is_struct => format!("struct {}", t),
-                t if is_union => format!("union {}", t),
-                t => t.to_string(),
-            }
+        cfg.skip_struct(|s| s != "termios2");
+        cfg.type_name(move |ty, is_struct, is_union| match ty {
+            t if is_struct => format!("struct {}", t),
+            t if is_union => format!("union {}", t),
+            t => t.to_string(),
         });
     } else {
         cfg.skip_const(|_| true);
diff --git a/src/dox.rs b/src/dox.rs
index 779641b3cc..33a9c166f4 100644
--- a/src/dox.rs
+++ b/src/dox.rs
@@ -2,10 +2,10 @@ pub use self::imp::*;
 
 #[cfg(not(cross_platform_docs))]
 mod imp {
-    pub use core::option::Option;
     pub use core::clone::Clone;
     pub use core::marker::Copy;
     pub use core::mem;
+    pub use core::option::Option;
 }
 
 #[cfg(cross_platform_docs)]
@@ -16,17 +16,23 @@ mod imp {
     }
     impl<T: Copy> Copy for Option<T> {}
     impl<T: Clone> Clone for Option<T> {
-        fn clone(&self) -> Option<T> { loop {} }
+        fn clone(&self) -> Option<T> {
+            loop {}
+        }
     }
 
     impl<T> Copy for *mut T {}
     impl<T> Clone for *mut T {
-        fn clone(&self) -> *mut T { loop {} }
+        fn clone(&self) -> *mut T {
+            loop {}
+        }
     }
 
     impl<T> Copy for *const T {}
     impl<T> Clone for *const T {
-        fn clone(&self) -> *const T { loop {} }
+        fn clone(&self) -> *const T {
+            loop {}
+        }
     }
 
     pub trait Clone {
@@ -47,52 +53,52 @@ mod imp {
     pub trait Sized {}
 
     macro_rules! each_int {
-        ($mac:ident) => (
+        ($mac:ident) => {
             $mac!(u8);
             $mac!(u16);
             $mac!(u32);
             $mac!(u64);
             $mac!(usize);
             each_signed_int!($mac);
-        )
+        };
     }
 
     macro_rules! each_signed_int {
-        ($mac:ident) => (
+        ($mac:ident) => {
             $mac!(i8);
             $mac!(i16);
             $mac!(i32);
             $mac!(i64);
             $mac!(isize);
-        )
+        };
     }
 
     #[lang = "div"]
-    pub trait Div<RHS=Self> {
+    pub trait Div<RHS = Self> {
         type Output;
         fn div(self, rhs: RHS) -> Self::Output;
     }
 
     #[lang = "shl"]
-    pub trait Shl<RHS=Self> {
+    pub trait Shl<RHS = Self> {
         type Output;
         fn shl(self, rhs: RHS) -> Self::Output;
     }
 
     #[lang = "mul"]
-    pub trait Mul<RHS=Self> {
+    pub trait Mul<RHS = Self> {
         type Output;
         fn mul(self, rhs: RHS) -> Self::Output;
     }
 
     #[lang = "sub"]
-    pub trait Sub<RHS=Self> {
+    pub trait Sub<RHS = Self> {
         type Output;
         fn sub(self, rhs: RHS) -> Self::Output;
     }
 
     #[lang = "bitand"]
-    pub trait BitAnd<RHS=Self> {
+    pub trait BitAnd<RHS = Self> {
         type Output;
         fn bitand(self, rhs: RHS) -> Self::Output;
     }
@@ -103,7 +109,7 @@ mod imp {
     }
 
     #[lang = "bitor"]
-    pub trait BitOr<RHS=Self> {
+    pub trait BitOr<RHS = Self> {
         type Output;
         fn bitor(self, rhs: RHS) -> Self::Output;
     }
@@ -114,7 +120,7 @@ mod imp {
     }
 
     #[lang = "bitxor"]
-    pub trait BitXor<RHS=Self> {
+    pub trait BitXor<RHS = Self> {
         type Output;
         fn bitxor(self, rhs: RHS) -> Self::Output;
     }
@@ -203,7 +209,11 @@ mod imp {
     each_int!(impl_traits);
 
     pub mod mem {
-        pub fn size_of_val<T>(_: &T) -> usize { 4 }
-        pub const fn size_of<T>() -> usize { 4 }
+        pub fn size_of_val<T>(_: &T) -> usize {
+            4
+        }
+        pub const fn size_of<T>() -> usize {
+            4
+        }
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
index c997960a4b..646e00c922 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -15,90 +15,117 @@
 #![crate_name = "libc"]
 #![cfg_attr(cross_platform_docs, feature(no_core, lang_items, const_fn))]
 #![cfg_attr(cross_platform_docs, no_core)]
-#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
-       html_favicon_url = "https://doc.rust-lang.org/favicon.ico")]
-
-#![cfg_attr(all(target_os = "linux", target_arch = "x86_64"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-linux-gnu"
-))]
-#![cfg_attr(all(target_os = "linux", target_arch = "x86"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/i686-unknown-linux-gnu"
-))]
-#![cfg_attr(all(target_os = "linux", target_arch = "arm"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/arm-unknown-linux-gnueabihf"
-))]
-#![cfg_attr(all(target_os = "linux", target_arch = "mips"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/mips-unknown-linux-gnu"
-))]
-#![cfg_attr(all(target_os = "linux", target_arch = "aarch64"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/aarch64-unknown-linux-gnu"
-))]
-#![cfg_attr(all(target_os = "linux", target_env = "musl"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-linux-musl"
-))]
-#![cfg_attr(all(target_os = "macos", target_arch = "x86_64"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/x86_64-apple-darwin"
-))]
-#![cfg_attr(all(target_os = "macos", target_arch = "x86"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/i686-apple-darwin"
-))]
-#![cfg_attr(all(windows, target_arch = "x86_64", target_env = "gnu"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/x86_64-pc-windows-gnu"
-))]
-#![cfg_attr(all(windows, target_arch = "x86", target_env = "gnu"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/i686-pc-windows-gnu"
-))]
-#![cfg_attr(all(windows, target_arch = "x86_64", target_env = "msvc"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/x86_64-pc-windows-msvc"
-))]
-#![cfg_attr(all(windows, target_arch = "x86", target_env = "msvc"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/i686-pc-windows-msvc"
-))]
-#![cfg_attr(target_os = "android", doc(
-    html_root_url = "https://rust-lang.github.io/libc/arm-linux-androideabi"
-))]
-#![cfg_attr(target_os = "freebsd", doc(
-    html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-freebsd"
-))]
-#![cfg_attr(target_os = "openbsd", doc(
-    html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-openbsd"
-))]
-#![cfg_attr(target_os = "bitrig", doc(
-    html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-bitrig"
-))]
-#![cfg_attr(target_os = "netbsd", doc(
-    html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-netbsd"
-))]
-#![cfg_attr(target_os = "dragonfly", doc(
-    html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-dragonfly"
-))]
-#![cfg_attr(target_os = "solaris", doc(
-    html_root_url = "https://rust-lang.github.io/libc/x86_64-sun-solaris"
-))]
-#![cfg_attr(all(target_os = "emscripten", target_arch = "asmjs"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/asmjs-unknown-emscripten"
-))]
-#![cfg_attr(all(target_os = "emscripten", target_arch = "wasm32"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/wasm32-unknown-emscripten"
-))]
-#![cfg_attr(all(target_os = "linux", target_arch = "sparc64"), doc(
-    html_root_url = "https://rust-lang.github.io/libc/sparc64-unknown-linux-gnu"
-))]
-
+#![doc(
+    html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
+    html_favicon_url = "https://doc.rust-lang.org/favicon.ico"
+)]
+#![cfg_attr(
+    all(target_os = "linux", target_arch = "x86_64"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-linux-gnu")
+)]
+#![cfg_attr(
+    all(target_os = "linux", target_arch = "x86"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/i686-unknown-linux-gnu")
+)]
+#![cfg_attr(
+    all(target_os = "linux", target_arch = "arm"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/arm-unknown-linux-gnueabihf")
+)]
+#![cfg_attr(
+    all(target_os = "linux", target_arch = "mips"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/mips-unknown-linux-gnu")
+)]
+#![cfg_attr(
+    all(target_os = "linux", target_arch = "aarch64"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/aarch64-unknown-linux-gnu")
+)]
+#![cfg_attr(
+    all(target_os = "linux", target_env = "musl"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-linux-musl")
+)]
+#![cfg_attr(
+    all(target_os = "macos", target_arch = "x86_64"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/x86_64-apple-darwin")
+)]
+#![cfg_attr(
+    all(target_os = "macos", target_arch = "x86"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/i686-apple-darwin")
+)]
+#![cfg_attr(
+    all(windows, target_arch = "x86_64", target_env = "gnu"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/x86_64-pc-windows-gnu")
+)]
+#![cfg_attr(
+    all(windows, target_arch = "x86", target_env = "gnu"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/i686-pc-windows-gnu")
+)]
+#![cfg_attr(
+    all(windows, target_arch = "x86_64", target_env = "msvc"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/x86_64-pc-windows-msvc")
+)]
+#![cfg_attr(
+    all(windows, target_arch = "x86", target_env = "msvc"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/i686-pc-windows-msvc")
+)]
+#![cfg_attr(
+    target_os = "android",
+    doc(html_root_url = "https://rust-lang.github.io/libc/arm-linux-androideabi")
+)]
+#![cfg_attr(
+    target_os = "freebsd",
+    doc(html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-freebsd")
+)]
+#![cfg_attr(
+    target_os = "openbsd",
+    doc(html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-openbsd")
+)]
+#![cfg_attr(
+    target_os = "bitrig",
+    doc(html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-bitrig")
+)]
+#![cfg_attr(
+    target_os = "netbsd",
+    doc(html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-netbsd")
+)]
+#![cfg_attr(
+    target_os = "dragonfly",
+    doc(html_root_url = "https://rust-lang.github.io/libc/x86_64-unknown-dragonfly")
+)]
+#![cfg_attr(
+    target_os = "solaris",
+    doc(html_root_url = "https://rust-lang.github.io/libc/x86_64-sun-solaris")
+)]
+#![cfg_attr(
+    all(target_os = "emscripten", target_arch = "asmjs"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/asmjs-unknown-emscripten")
+)]
+#![cfg_attr(
+    all(target_os = "emscripten", target_arch = "wasm32"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/wasm32-unknown-emscripten")
+)]
+#![cfg_attr(
+    all(target_os = "linux", target_arch = "sparc64"),
+    doc(html_root_url = "https://rust-lang.github.io/libc/sparc64-unknown-linux-gnu")
+)]
 // Attributes needed when building as part of the standard library
 #![cfg_attr(feature = "stdbuild", feature(staged_api, cfg_target_vendor))]
 #![cfg_attr(feature = "stdbuild", feature(link_cfg, repr_packed))]
 #![cfg_attr(feature = "stdbuild", allow(warnings))]
-#![cfg_attr(feature = "stdbuild", unstable(feature = "libc",
-                               reason = "use `libc` from crates.io",
-                               issue = "27783"))]
-
+#![cfg_attr(
+    feature = "stdbuild",
+    unstable(
+        feature = "libc",
+        reason = "use `libc` from crates.io",
+        issue = "27783"
+    )
+)]
 #![cfg_attr(not(feature = "use_std"), no_std)]
 
 #[cfg(all(not(cross_platform_docs), feature = "use_std"))]
 extern crate std as core;
 
-#[macro_use] mod macros;
+#[macro_use]
+mod macros;
 mod dox;
 
 /*
diff --git a/src/macros.rs b/src/macros.rs
index 5a468b59cb..77205788c8 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -68,7 +68,9 @@ macro_rules! f {
 }
 
 macro_rules! __item {
-    ($i:item) => ($i)
+    ($i:item) => {
+        $i
+    };
 }
 
 #[allow(unused_macros)]