Build clang --without-llvmgcc and --without-llvmgxx

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="${THIS_DIR}"/../../../third_party/llvm
 CLANG_DIR="${LLVM_DIR}"/tools/clang
@@ skipping 26 matching lines @@
 
 # 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 "${LLVM_DIR}"/../llvm-build
 cd "${LLVM_DIR}"/../llvm-build
 if [ ! -f ./config.status ]; then
-  ../llvm/configure --enable-optimized
+  ../llvm/configure \
+      --enable-optimized \
+      --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}"/../llvm/tools/clang/tools/chrome-plugin
 PLUGIN_BUILD_DIR="${LLVM_DIR}"/../llvm-build/tools/clang/tools/chrome-plugin
 rm -rf "${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}"