Switch to using the LLVM gold plugin as a fully linked-in object rather than DSO.

pnacl/driver/pnacl-ld.py

 #!/usr/bin/python
 # Copyright (c) 2012 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 # IMPORTANT NOTE: If you make local mods to this file, you must run:
 #   %  pnacl/build.sh driver
 # in order for them to take effect in the scons build.  This command
 # updates the copy in the toolchain/ tree.
 #
@@ skipping 39 matching lines @@
   'TRANSLATE_FLAGS_USER': '',
 
   'OPT_FLAGS': '-O${OPT_LEVEL} ${OPT_STRIP_%STRIP_MODE%} ' +
                '-inline-threshold=${OPT_INLINE_THRESHOLD}',
   'OPT_INLINE_THRESHOLD': '100',
   'OPT_LEVEL': '0',
   'OPT_STRIP_none': '',
   'OPT_STRIP_all': '-disable-opt --strip',
   'OPT_STRIP_debug': '-disable-opt --strip-debug',
 
-  'GOLD_PLUGIN_ARGS': '-plugin=${GOLD_PLUGIN_SO} ' +

[jvoung - send to chromium..., 2012/02/18 00:10:39]

can the GOLD_PLUGIN_SO variable be removed too?

[pdox, 2012/02/18 00:15:59]

Done.

+  'GOLD_PLUGIN_ARGS': '-plugin=LLVMgold ' +
                       '-plugin-opt=emit-llvm',
 
   'LD_FLAGS'       : '-nostdlib ${@AddPrefix:-L:SEARCH_DIRS} ' +
                      '${SHARED ? -shared} ${STATIC ? -static} ' +
                      '${RELOCATABLE ? -relocatable} ' +
                      '${#SONAME ? --soname=${SONAME}}',
 
   # Flags for native linking.
   # Only allowed if ALLOW_NATIVE is true.
   'LD_FLAGS_NATIVE': '',
@@ skipping 333 matching lines @@
   RunDriver('translate', args)
 
 def LinkBC(inputs, output):
   '''Input: a bunch of bc/o/lib input files
      Output: a combined & optimized bitcode file
   '''
   # Produce combined bitcode file
   RunWithEnv('${RUN_BCLD}',
              inputs=inputs,
              output=output)