Make it easier to build new tools for Clang.

tools/clang/scripts/update.sh

 #!/usr/bin/env bash
 # Copyright (c) 2012 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.
 
 # Do NOT CHANGE this if you don't know what you're doing -- see
 # https://code.google.com/p/chromium/wiki/UpdatingClang
 # Reverting problematic clang rolls is safe, though.
@@ skipping 295 matching lines @@
     mv "${TC}/libexec/gcc/arm-linux-androideabi/4.6.x-google" \
         "${TC}/libexec/gcc/arm-linux-androideabi/4.6"
   fi
 
   # Build ASan runtime for Android.
   cd "${LLVM_BUILD_DIR}"
   make -C tools/clang/runtime/ LLVM_ANDROID_TOOLCHAIN_DIR="../../../../${TC}"
   cd -
 fi
 
-# 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}"
-MACOSX_DEPLOYMENT_TARGET=10.5 make -j"${NUM_JOBS}" -C "${PLUGIN_BUILD_DIR}"
+# Build Chrome-specific clang tools. Paths in this list should be relative to
+# tools/clang.
+CHROME_TOOL_DIRS="plugins"
+# For each tool directory, copy it into the clang tree and use clang's build
+# system to compile it.
+for CHROME_TOOL_DIR in ${CHROME_TOOL_DIRS}; do
+  TOOL_SRC_DIR="${THIS_DIR}/../${CHROME_TOOL_DIR}"
+  TOOL_DST_DIR="${LLVM_DIR}/tools/clang/tools/chrome-${CHROME_TOOL_DIR}"
+  TOOL_BUILD_DIR="${LLVM_BUILD_DIR}/tools/clang/tools/chrome-${CHROME_TOOL_DIR}"
+  rm -rf "${TOOL_DST_DIR}"
+  cp -R "${TOOL_SRC_DIR}" "${TOOL_DST_DIR}"
+  rm -rf "${TOOL_BUILD_DIR}"
+  mkdir -p "${TOOL_BUILD_DIR}"
+  cp "${TOOL_SRC_DIR}/Makefile" "${TOOL_BUILD_DIR}"
+  MACOSX_DEPLOYMENT_TARGET=10.5 make -j"${NUM_JOBS}" -C "${TOOL_BUILD_DIR}"
+done
 
 if [[ -n "$run_tests" ]]; then
   # Run a few tests.
+  PLUGIN_SRC_DIR="${THIS_DIR}/../plugins"
   "${PLUGIN_SRC_DIR}/tests/test.sh" "${LLVM_BUILD_DIR}/Release+Asserts"
   cd "${LLVM_BUILD_DIR}"
   make check-all
   cd -
 fi
 
 # After everything is done, log success for this revision.
 echo "${CLANG_REVISION}" > "${STAMP_FILE}"