Add options for base dir and redirecting files to IRT open resource and use it.

pnacl/driver/driver_env.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.
 
 # Global environment and expression parsing for the PNaCl driver
 
 
 # This dictionary initializes a shell-like environment.
 # Shell escaping and ${} substitution are provided.
@@ skipping 112 matching lines @@
 
   'SCONS_STAGING'       : '${SCONS_STAGING_%ARCH%}',
   'SCONS_STAGING_X8632' : '${SCONS_OUT}/opt-${SCONS_OS}-x86-32/staging',
   'SCONS_STAGING_X8664' : '${SCONS_OUT}/opt-${SCONS_OS}-x86-64/staging',
   'SCONS_STAGING_ARM'   : '${SCONS_OUT}/opt-${SCONS_OS}-arm/staging',
   'SCONS_STAGING_MIPS32': '${SCONS_OUT}/opt-${SCONS_OS}-mips32/staging',
 
   'SEL_UNIVERSAL_PREFIX': '${USE_EMULATOR ? ${EMULATOR}}',
   'SEL_UNIVERSAL'       : '${SCONS_STAGING}/sel_universal${EXEC_EXT}',
   # NOTE: -Q skips sel_ldr qualification tests, -c -c skips validation
-  # NOTE: We are not using -B to load the IRT, since the translators do not
-  # use the IRT.
   'SEL_UNIVERSAL_FLAGS' : '--abort_on_error ' +
-                          '--uses_reverse_service ' +
                           '${USE_EMULATOR ? -Q -c -c --command_prefix ${EMULATOR}}',
 
   'IRT_STAGING'         : '${IRT_STAGING_%ARCH%}',
   'IRT_STAGING_X8632'   : '${SCONS_OUT}/nacl_irt-x86-32/staging',
   'IRT_STAGING_X8664'   : '${SCONS_OUT}/nacl_irt-x86-64/staging',
   'IRT_STAGING_ARM'     : '${SCONS_OUT}/nacl_irt-arm/staging',
   'IRT_STAGING_MIPS32'  : '${SCONS_OUT}/nacl_irt-mips32/staging',
   'IRT_BLOB'            : '${IRT_STAGING}/irt_core.nexe',
 
   'EMULATOR'            : '${EMULATOR_%ARCH%}',
@@ skipping 368 matching lines @@
 
 
 env = Environment()
 
 def override_env(meth_name, func):
   """Override a method in the global |env|, given the method name
   and the new function.
   """
   global env
   setattr(env, meth_name, types.MethodType(func, env, Environment))