roll clang 138187:138500

Also pass --disable-threads and --disable-pthreads to configure, for goma.

Also modify the script to try to download prebuilt binaries first. This is faster,
and makes sure the bots use the exact same binary as goma. The binaries are
downloaded from http://commondatastorage.googleapis.com/chromium-browser-clang/index.html

Also add a script that packages a clang build up into a tgz for uploading with
gsutil, based on code by ukai@.

Finally, if the svn checkout fails, remove the destination directory and try
again (for bots that have a checkout from before we had an internal llvm svn
mirror).

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/7741039

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@98416 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 84 insertions, 2 deletions

diff --git a/DEPS b/DEPS
index 79533f7..a461868 100644
--- a/DEPS
+++ b/DEPS
@@ -35,7 +35,7 @@ vars = {
 
   # Note: On most bots, clang is not checked out via DEPS but by
   # tools/clang/scripts/update.sh. The script reads this line here.
-  "clang_revision": "138187",
+  "clang_revision": "138500",
 }
 
 deps = {
diff --git a/tools/clang/scripts/package.sh b/tools/clang/scripts/package.sh
new file mode 100755
index 0000000..fa0a575
--- /dev/null
+++ b/tools/clang/scripts/package.sh
@@ -0,0 +1,54 @@
+#!/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, and then package the results up
+# to a tgz file.
+
+THIS_DIR="$(dirname "${0}")"
+LLVM_BUILD_DIR="${THIS_DIR}/../../../third_party/llvm-build"
+LLVM_BIN_DIR="${LLVM_BUILD_DIR}/Release+Asserts/bin"
+LLVM_LIB_DIR="${LLVM_BUILD_DIR}/Release+Asserts/lib"
+
+set -ex
+
+# Do a clobber build.
+rm -rf "${LLVM_BUILD_DIR}"
+"${THIS_DIR}"/update.sh
+
+R=$("${LLVM_BIN_DIR}/clang" --version | \
+     sed -ne 's/clang version .*(trunk \([0-9]*\))/\1/p')
+
+PDIR=clang-$R
+rm -rf $PDIR
+mkdir $PDIR
+mkdir $PDIR/bin
+mkdir $PDIR/lib
+
+# Copy clang into pdir, symlink clang++ to it.
+cp "${LLVM_BIN_DIR}/clang" $PDIR/bin/
+(cd $PDIR/bin && ln -sf clang clang++ && cd -)
+
+# Copy plugins. Some of the dylibs are pretty big, so copy only the ones we
+# care about.
+if [ "$(uname -s)" = "Darwin" ]; then
+  cp "${LLVM_LIB_DIR}/libFindBadConstructs.dylib" $PDIR/lib
+else
+  cp "${LLVM_LIB_DIR}/libFindBadConstructs.so" $PDIR/lib
+fi
+
+# Copy built-in headers (lib/clang/3.0/include).
+cp -R "${LLVM_LIB_DIR}/clang" $PDIR/lib
+
+tar zcf $PDIR.tgz -C $PDIR bin lib
+
+if [ "$(uname -s)" = "Darwin" ]; then
+  PLATFORM=Mac
+else
+  PLATFORM=Linux_x64
+fi
+
+echo To upload, run:
+echo gsutil cp -a public-read $PDIR.tgz \
+     gs://chromium-browser-clang/$PLATFORM/$PDIR.tgz
diff --git a/tools/clang/scripts/update.sh b/tools/clang/scripts/update.sh
index 352eff1..27abeab 100755
--- a/tools/clang/scripts/update.sh
+++ b/tools/clang/scripts/update.sh
@@ -34,11 +34,37 @@ fi
 # To always force a new build if someone interrupts their build half way.
 rm -f "${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":' "${DEPS_FILE}"; then
@@ -59,6 +85,8 @@ cd "${LLVM_BUILD_DIR}"
 if [ ! -f ./config.status ]; then
   ../llvm/configure \
       --enable-optimized \
+      --disable-threads \
+      --disable-pthreads \
       --without-llvmgcc \
       --without-llvmgxx
 fi