Clang toolchain: use lld to compile LLVM Gold plugin and lld with LTO.

tools/clang/scripts/package.py

 #!/usr/bin/env python
 # Copyright (c) 2015 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."""
 
 import argparse
 import fnmatch
@@ skipping 160 matching lines @@
 
     Tee('Starting build\n', log)
 
     # Do a clobber build.
     shutil.rmtree(LLVM_BOOTSTRAP_DIR, ignore_errors=True)
     shutil.rmtree(LLVM_BOOTSTRAP_INSTALL_DIR, ignore_errors=True)
     shutil.rmtree(LLVM_BUILD_DIR, ignore_errors=True)
 
     opt_flags = []
     if sys.platform.startswith('linux'):
-      opt_flags += ['--lto-gold-plugin']
+      opt_flags += ['--lto']
     build_cmd = [sys.executable, os.path.join(THIS_DIR, 'update.py'),
                  '--bootstrap', '--force-local-build',
                  '--run-tests'] + opt_flags
     TeeCmd(build_cmd, log)
 
   stamp = open(STAMP_FILE).read().rstrip()
   if stamp != expected_stamp:
     print 'Actual stamp (%s) != expected stamp (%s).' % (stamp, expected_stamp)
     return 1
 
@@ skipping 18 matching lines @@
                  'lib/libBlinkGCPlugin.' + so_ext,
                  ])
   if sys.platform == 'darwin':
     want.extend([# Copy only the OSX (ASan and profile) and iossim (ASan)
                  # runtime libraries:
                  'lib/clang/*/lib/darwin/*asan_osx*',
                  'lib/clang/*/lib/darwin/*asan_iossim*',
                  'lib/clang/*/lib/darwin/*profile_osx*',
                  ])
   elif sys.platform.startswith('linux'):
+    want.append('bin/lld')
     # Copy the libstdc++.so.6 we linked Clang against so it can run.
     want.append('lib/libstdc++.so.6')
     # Copy only
     # lib/clang/*/lib/linux/libclang_rt.{[atm]san,san,ubsan,profile}-*.a ,
     # but not dfsan.
     want.extend(['lib/clang/*/lib/linux/*[atm]san*',
                  'lib/clang/*/lib/linux/*ubsan*',
                  'lib/clang/*/lib/linux/*libclang_rt.san*',
                  'lib/clang/*/lib/linux/*profile*',
                  'lib/clang/*/msan_blacklist.txt',
@@ skipping 67 matching lines @@
   with tarfile.open(objdumpdir + '.tgz', 'w:gz') as tar:
     tar.add(os.path.join(objdumpdir, 'bin'), arcname='bin',
             filter=PrintTarProgress)
   MaybeUpload(args, objdumpdir, platform)
 
   # FIXME: Warn if the file already exists on the server.
 
 
 if __name__ == '__main__':
   sys.exit(main())