Add a scons pnacl finalize step for pnacl_generate_pexe tests.

tests/toolchain/nacl.scons

 # -*- 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.
 
 Import('env')
 
 # force inclusion of entire library, so that we can validate it
 # NOTE: This approach does not work for -lc because of tons of
 #       undefined symbols which would have to be stubbed out
@@ skipping 271 matching lines @@
 
 # Test that local variable dwarf info is preserved with linking and LTO.
 # Force '-g' on in case it was not turned on for some reason, and lower
 # optimization settings to prevent some optimizations that would convert
 # locals from llvm allocas to registers.
 # We may be able to remove this test once LLVM has an upstream regression test.
 debug_env = env.Clone()
 debug_env.Append(CFLAGS=['-g', '-O0'])
 debug_env.Append(CCFLAGS=['-g', '-O0'])
 debug_env.Append(LINKFLAGS=['-O0'])
-dwarf_local_var_nexe = debug_env.ComponentProgram('dwarf_local_var',
-                                                  ['dwarf_local_var.c',
-                                                   'dwarf_local_var_dummy.c'],
-                                                  EXTRA_LIBS=['${NONIRT_LIBS}'])
-# Sanity-check -- make sure it runs.
-node = debug_env.CommandSelLdrTestNacl('dwarf_local_var_run.out',
-                                       dwarf_local_var_nexe,
-                                       exit_status=55)
-debug_env.AddNodeToTestSuite(node,
-                             ['toolchain_tests', 'small_tests'],
-                             'run_dwarf_local_var_run_test')
-node = debug_env.CommandTestFileDumpCheck('dwarf_local_var_objdump.out',
-                                          dwarf_local_var_nexe,
-                                          debug_env.File('dwarf_local_var.c'),
-                                          '-W')
-debug_env.AddNodeToTestSuite(node,
-                             ['small_tests', 'toolchain_tests'],
-                             'run_dwarf_local_var_objdump_test')
+# This requires preserving nonstable bitcode debug metadata.
+if debug_env.Bit('bitcode'):
+  debug_env.SetBits('nonstable_bitcode')
+if not debug_env.Bit('skip_nonstable_bitcode'):
+  dwarf_local_var_nexe = debug_env.ComponentProgram(
+      'dwarf_local_var',
+      ['dwarf_local_var.c',
+       'dwarf_local_var_dummy.c'],
+      EXTRA_LIBS=['${NONIRT_LIBS}'])
+  # Sanity-check -- make sure it runs.
+  node = debug_env.CommandSelLdrTestNacl('dwarf_local_var_run.out',
+                                         dwarf_local_var_nexe,
+                                         exit_status=55)
+  debug_env.AddNodeToTestSuite(node,
+                               ['toolchain_tests', 'small_tests'],
+                               'run_dwarf_local_var_run_test')
+  node = debug_env.CommandTestFileDumpCheck('dwarf_local_var_objdump.out',
+                                            dwarf_local_var_nexe,
+                                            debug_env.File('dwarf_local_var.c'),
+                                            '-W')
+  debug_env.AddNodeToTestSuite(node,
+                               ['small_tests', 'toolchain_tests'],
+                               'run_dwarf_local_var_objdump_test')
 
 if env.Bit('nacl_glibc'):
   nexe = env.ComponentProgram('byteswap64', 'byteswap64.c',
                               EXTRA_LIBS=['${NONIRT_LIBS}'])
   node = env.CommandSelLdrTestNacl('byteswap64.out', nexe)
   env.AddNodeToTestSuite(node,
                          ['toolchain_tests', 'small_tests'],
                          'run_byteswap64_test')
 
 # Test that using link-time optimization does not convert calls to
 # library functions that were never linked in.
 if env.Bit('bitcode'):
   unopt_env = env.Clone()
   unopt_env.Append(CFLAGS=['-O0'])
   unopt_env.Append(CCFLAGS=['-O0'])
   opt_env = env.Clone()
   opt_env.Append(CFLAGS=['-O3'])
   opt_env.Append(CCFLAGS=['-O3'])
   opt_env.Append(LINKFLAGS=['-O3'])
   obj = unopt_env.ComponentObject('printf_to_puts.c')
   nexe = opt_env.ComponentProgram('printf_to_puts',
                                   obj,
                                   EXTRA_LIBS=['${NONIRT_LIBS}'])
   node = env.CommandSelLdrTestNacl('printf_to_puts.out', nexe)
   env.AddNodeToTestSuite(node,
                          ['toolchain_tests', 'small_tests'],
                          'run_printf_to_puts_test')