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

pnacl/driver/pnacl-translate.py

Index: pnacl/driver/pnacl-translate.py
diff --git a/pnacl/driver/pnacl-translate.py b/pnacl/driver/pnacl-translate.py
index b03eb7cfe62e8abb9cb0cfc34e3c25a31dcd7fc0..df3105c33f7855e61187ce662667621ef6beb793 100755
--- a/pnacl/driver/pnacl-translate.py
+++ b/pnacl/driver/pnacl-translate.py
@@ -354,14 +354,13 @@ def main(argv):
     # do module splitting when using it.
     env.set('SPLIT_MODULE', '1')
   else:
-    modules = env.getone('SPLIT_MODULE')
-    if modules != '1':
-      env.append('LLC_FLAGS_EXTRA', '-split-module=' + modules)
-      env.append('LD_FLAGS', '-split-module=' + modules)
+    # Do not set -streaming-bitcode for sandboxed mode, because it is already
+    # in the default command line.
     if not env.getbool('SANDBOXED') and env.getbool('STREAM_BITCODE'):

[jvoung (off chromium), 2014/12/02 16:24:08]

Had to revert this bit to stay within the "else:".

Otherwise -streaming-bitcode seems to also break some of the EH tests:
Alias must point to a definition
void (%"class.std::bad_alloc"*)* @_ZNSt9bad_allocC1Ev
Alias must point to a definition
void (%"class.std::bad_alloc"*)* @_ZNSt9bad_allocD1Ev
Alias must point to a definition
void (%"class.std::bad_array_new_length"*)* @_ZNSt20bad_array_new_lengthC1Ev
Alias must point to a definition
void (%"class.std::bad_array_new_length"*)* @_ZNSt20bad_array_new_lengthD1Ev
Alias must point to a definition
void (%"class.std::bad_array_new_length"*)* @_ZNSt20bad_array_new_lengthD2Ev
Alias must point to a definition
void (%"class.std::bad_array_length"*)* @_ZNSt16bad_array_lengthC1Ev

-      # Do not set -streaming-bitcode for sandboxed mode, because it is already
-      # in the default command line.
       env.append('LLC_FLAGS_EXTRA', '-streaming-bitcode')
+  modules = env.getone('SPLIT_MODULE')
+  env.append('LLC_FLAGS_EXTRA', '-split-module=' + modules)
+  env.append('LD_FLAGS', '-split-module=' + modules)
 
   # If there's a bitcode file, translate it now.
   tng = driver_tools.TempNameGen(inputs + bcfiles, output)