compile.py: add Clang lib/ dir to LD_LIBRARY_PATH on Linux.

scripts/slave/compile.py

 #!/usr/bin/env python
 # 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.
 
 """A tool to build chrome, executed by buildbot.
 
   When this is run, the current directory (cwd) should be the outer build
   directory (e.g., chrome-release/build/).
 
@@ skipping 921 matching lines @@
       assert options.goma_dir is None
 
     # ninja is different from all the other build systems in that it requires
     # most configuration to be done at gyp time. This is why this function does
     # less than the other comparable functions in this file.
     print 'chdir to %s' % options.src_dir
     os.chdir(options.src_dir)
 
     command = ['ninja', '-w', 'dupbuild=err', '-C', options.target_output_dir]
 
+    if chromium_utils.IsLinux() and options.compiler in ('clang', 'goma-clang'):
+      clang_lib_dir = os.path.abspath(os.path.join(options.src_dir,
+          'third_party', 'llvm-build', 'Release+Asserts', 'lib'))
+      if not 'LD_LIBRARY_PATH' in env:
+        env['LD_LIBRARY_PATH'] = ''
+      env['LD_LIBRARY_PATH'] += clang_lib_dir + ':'
+
     # HACK(yyanagisawa): update environment files on |env| update.
     # For compiling on Windows, environment in environment files are used.
     # It means even if enviroment such as GOMA_DISABLED is updated in
     # compile.py, the update will be ignored.
     # We need to update environment files to reflect the update.
     if chromium_utils.IsWindows() and NeedEnvFileUpdateOnWin(env):
       print 'Updating environment.{x86,x64} files.'
       UpdateWindowsEnvironment(options.target_output_dir, env)
 
     if options.clobber:
@@ skipping 426 matching lines @@
       sys.stderr.write('Unknown build tool %s.\n' % repr(options.build_tool))
       return 2
 
   options.target_output_dir = get_target_build_dir(args, options)
 
   return main(options, args)
 
 
 if '__main__' == __name__:
   sys.exit(real_main())