Apply the flags to the SCons environment used to link the library to have the...

SConstruct

 # Copyright 2008 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 27 matching lines @@
 
 LIBRARY_FLAGS = {
   'all': {
     'CPPDEFINES':   ['ENABLE_LOGGING_AND_PROFILING']
   },
   'gcc': {
     'all': {
       'DIALECTFLAGS': ['-ansi'],
       'CCFLAGS':      ['$DIALECTFLAGS', '$WARNINGFLAGS',
           '-fno-strict-aliasing'],
-      'CXXFLAGS':     ['$CCFLAGS', '-fno-rtti', '-fno-exceptions'],
+      'CXXFLAGS':     ['-fno-rtti', '-fno-exceptions'],
       'LIBS':         ['pthread']
     },
     'mode:debug': {
       'CCFLAGS':      ['-g', '-O0'],
       'CPPDEFINES':   ['ENABLE_DISASSEMBLER', 'DEBUG']
     },
     'mode:release': {
       'CCFLAGS':      ['-O2']
     },
     'wordsize:64': {
@@ skipping 390 matching lines @@
 
   # Build the object files by invoking SCons recursively.  
   object_files = env.SConscript(
     join('src', 'SConscript'),
     build_dir=join('obj', target_id),
     exports='context',
     duplicate=False
   )
   
   # Link the object files into a library.
+  env.Replace(**context.flags['v8'])
   context.ApplyEnvOverrides(env)
   if context.options['library'] == 'static':
     library = env.StaticLibrary(library_name, object_files)
   else:
     # There seems to be a glitch in the way scons decides where to put
     # PDB files when compiling using MSVC so we specify it manually.
     # This should not affect any other platforms.
     pdb_name = library_name + '.dll.pdb'
     library = env.SharedLibrary(library_name, object_files, PDB=pdb_name)
   context.library_targets.append(library)
@@ skipping 58 matching lines @@
 # version of scons.  Also, there's a bug in some revisions that
 # doesn't allow this flag to be set, so we swallow any exceptions.
 # Lovely.
 try:
   SetOption('warn', 'no-deprecated')
 except:
   pass
 
 
 Build()