roll clang 138187:138188

tools/clang/scripts/update.sh

 #!/bin/bash
 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This script will check out llvm and clang into third_party/llvm and build it.
 
 THIS_DIR="$(dirname "${0}")"
 LLVM_DIR="${THIS_DIR}/../../../third_party/llvm"
 LLVM_BUILD_DIR="${LLVM_DIR}/../llvm-build"
@@ skipping 16 matching lines @@
 if [ -f "${STAMP_FILE}" ]; then
   PREVIOUSLY_BUILT_REVISON=$(cat "${STAMP_FILE}")
   if [ "${PREVIOUSLY_BUILT_REVISON}" = "${CLANG_REVISION}" ]; then
     echo "Clang already at ${CLANG_REVISION}"
     exit 0
   fi
 fi
 # To always force a new build if someone interrupts their build half way.
 rm -f "${STAMP_FILE}"
 
+# Check if there's a prebuilt binary and if so just fetch that. That's faster,
+# and goma relies on having matching binary hashes on client and server too.
+CDS_URL=http://commondatastorage.googleapis.com/chromium-browser-clang
+CDS_FILE="clang-${CLANG_REVISION}.tgz"
+echo Trying to download prebuilt clang
+if [ "$(uname -s)" = "Linux" ]; then
+  wget "${CDS_URL}/Linux_x64/${CDS_FILE}" || rm -f "${CDS_FILE}"
+elif [ "$(uname -s)" = "Darwin" ]; then
+  curl -L --fail -O "${CDS_URL}/Mac/${CDS_FILE}" || rm -f "${CDS_FILE}"
+fi
+if [ -f "${CDS_FILE}" ]; then
+  rm -rf "${LLVM_BUILD_DIR}/Release+Asserts"
+  mkdir -p "${LLVM_BUILD_DIR}/Release+Asserts"
+  tar -xzf "${CDS_FILE}" -C "${LLVM_BUILD_DIR}/Release+Asserts"
+  echo clang "${CLANG_REVISION}" unpacked
+  echo "${CLANG_REVISION}" > "${STAMP_FILE}"
+  exit 0
+else
+  echo Did not find prebuilt clang at r"${CLANG_REVISION}", building
+fi
+
 if grep -q 'src/third_party/llvm":' "${DEPS_FILE}"; then
   echo LLVM pulled in through DEPS, skipping LLVM update step
 else
   echo Getting LLVM r"${CLANG_REVISION}" in "${LLVM_DIR}"
-  svn co --force "${LLVM_REPO_URL}/llvm/trunk@${CLANG_REVISION}" "${LLVM_DIR}"
+  if ! svn co --force "${LLVM_REPO_URL}/llvm/trunk@${CLANG_REVISION}" \
+                      "${LLVM_DIR}"; then
+    echo Checkout failed, retrying
+    rm -rf "${LLVM_DIR}"
+    svn co --force "${LLVM_REPO_URL}/llvm/trunk@${CLANG_REVISION}" "${LLVM_DIR}"
+  fi
 fi
 
 if grep -q 'src/third_party/llvm/tools/clang":' "${DEPS_FILE}"; then
   echo clang pulled in through DEPS, skipping clang update step
 else
   echo Getting clang r"${CLANG_REVISION}" in "${CLANG_DIR}"
   svn co --force "${LLVM_REPO_URL}/cfe/trunk@${CLANG_REVISION}" "${CLANG_DIR}"
 fi
 
 # Echo all commands.
 set -x
 
 # Build clang (in a separate directory).
 # The clang bots have this path hardcoded in built/scripts/slave/compile.py,
 # so if you change it you also need to change these links.
 mkdir -p "${LLVM_BUILD_DIR}"
 cd "${LLVM_BUILD_DIR}"
 if [ ! -f ./config.status ]; then
   ../llvm/configure \
       --enable-optimized \
+      --disable-threads \
+      --disable-pthreads \
       --without-llvmgcc \
       --without-llvmgxx
 fi
 
 NUM_JOBS=3
 if [ "$(uname -s)" = "Linux" ]; then
   NUM_JOBS="$(grep -c "^processor" /proc/cpuinfo)"
 elif [ "$(uname -s)" = "Darwin" ]; then
   NUM_JOBS="$(sysctl -n hw.ncpu)"
 fi
 make -j"${NUM_JOBS}"
 cd -
 
 # Build plugin.
 # Copy it into the clang tree and use clang's build system to compile the
 # plugin.
 PLUGIN_SRC_DIR="${THIS_DIR}/../plugins"
 PLUGIN_DST_DIR="${LLVM_DIR}/tools/clang/tools/chrome-plugin"
 PLUGIN_BUILD_DIR="${LLVM_BUILD_DIR}/tools/clang/tools/chrome-plugin"
 rm -rf "${PLUGIN_DST_DIR}"
 cp -R "${PLUGIN_SRC_DIR}" "${PLUGIN_DST_DIR}"
 rm -rf "${PLUGIN_BUILD_DIR}"
 mkdir -p "${PLUGIN_BUILD_DIR}"
 cp "${PLUGIN_SRC_DIR}/Makefile" "${PLUGIN_BUILD_DIR}"
 make -j"${NUM_JOBS}" -C "${PLUGIN_BUILD_DIR}"
 
 # After everything is done, log success for this revision.
 echo "${CLANG_REVISION}" > "${STAMP_FILE}"