Build options are set via a build_options file in the

build directory instead of being inferred from the name
of the build directory.
Options are passed to C++ via config/*.hh files instead of
via the command line.  Build option flags are now always
defined to 0 or 1, so checks must use '#if' rather than
'#ifdef'.

SConscript:
    MySQL detection moved to SConstruct.
    Add config/*.hh files (via ConfigFile builder).
arch/alpha/alpha_memory.cc:
arch/alpha/ev5.cc:
arch/alpha/ev5.hh:
arch/alpha/isa_traits.hh:
base/fast_alloc.hh:
base/statistics.cc:
base/statistics.hh:
base/stats/events.cc:
base/stats/events.hh:
cpu/base.cc:
cpu/base.hh:
cpu/base_dyn_inst.cc:
cpu/base_dyn_inst.hh:
cpu/exec_context.cc:
cpu/exec_context.hh:
cpu/o3/alpha_cpu.hh:
cpu/o3/alpha_cpu_builder.cc:
cpu/o3/alpha_cpu_impl.hh:
cpu/o3/alpha_dyn_inst.hh:
cpu/o3/alpha_dyn_inst_impl.hh:
cpu/o3/alpha_params.hh:
cpu/o3/commit_impl.hh:
cpu/o3/cpu.cc:
cpu/o3/cpu.hh:
cpu/o3/fetch_impl.hh:
cpu/o3/iew.hh:
cpu/o3/iew_impl.hh:
cpu/o3/regfile.hh:
cpu/o3/rename_impl.hh:
cpu/o3/rob_impl.hh:
cpu/ozone/cpu.hh:
cpu/pc_event.cc:
cpu/simple/cpu.cc:
cpu/simple/cpu.hh:
sim/process.cc:
sim/process.hh:
    Convert compile flags from def/undef to 0/1.
    Set via #include config/*.hh instead of command line.
arch/alpha/isa_desc:
    Convert compile flags from def/undef to 0/1.
    Set via #include config/*.hh instead of command line.
    Revamp fenv.h support... most of the ugliness is hidden
    in base/fenv.hh now.
base/mysql.hh:
    Fix typo in #ifndef guard.
build/SConstruct:
    Build options are set via a build_options file in the
    build directory instead of being inferred from the name
    of the build directory.
    Options are passed to C++ via config/*.hh files instead of
    via the command line.
python/SConscript:
    Generate m5_build_env directly from scons options
    instead of indirectly via CPPDEFINES.
python/m5/convert.py:
    Allow '0' and '1' for booleans.
    Rewrite toBool to use dict.
base/fenv.hh:
    Revamp <fenv.h> support to make it a compile option
    (so we can test w/o it even if it's present) and to
    make isa_desc cleaner.

--HG--
extra : convert_revision : 8f97dc11185bef5e1865b3269c7341df8525c9ad

python/SConscript

@@ -151,7 +151,7 @@ def MakeDefinesPyFile(target, source, env):
     f = file(str(target[0]), 'w')
     print >>f, "import __main__"
     print >>f, "__main__.m5_build_env = ",
-    print >>f, scons_helper.flatten_defines(env['CPPDEFINES'])
+    print >>f, source[0]
     f.close()
 
 CFileCounter = 0
@@ -196,7 +196,10 @@ for root, dirs, files in os.walk(objpath, topdown=True):
             embedded_py_files.append(os.path.join(root, f))
 
 embedfile_hh = os.path.join(env['SRCDIR'], 'base/embedfile.hh')
-env.Command('defines.py', None, MakeDefinesPyFile)
+
+optionDict = dict([(opt, env[opt]) for opt in env.ExportOptions])
+env.Command('defines.py', Value(optionDict), MakeDefinesPyFile)
+
 env.Command('embedded_py.py', embedded_py_files, MakeEmbeddedPyFile)
 env.Depends('embedded_py.cc', embedfile_hh)
 env.Command('embedded_py.cc',

python/m5/convert.py

@@ -105,17 +105,20 @@ def toInteger(value):
 
     return result
 
+_bool_dict = {
+    'true' : True,   't' : True,  'yes' : True, 'y' : True,  '1' : True,
+    'false' : False, 'f' : False, 'no' : False, 'n' : False, '0' : False
+    }
+
 def toBool(value):
     if not isinstance(value, str):
         raise TypeError, "wrong type '%s' should be str" % type(value)
 
     value = value.lower()
-    if value == "true" or value == "t" or value == "yes" or value == "y":
-        return True
-    elif value == "false" or value == "f" or value == "no" or value == "n":
-        return False
-
-    raise ValueError, "cannot convert '%s' to bool" % value
+    result = _bool_dict.get(value, None)
+    if result == None:
+        raise ValueError, "cannot convert '%s' to bool" % value
+    return result
 
 def toFrequency(value):
     if not isinstance(value, str):