Link in Python interpreter.

Use embedded zip archive to carry Python code instead
of homegrown embedded string/file mechanism.
Do argument parsing in Python instead of C++.

SConstruct:
    Add Python interpreter include path & library.
    Define two new simple builders which copy &
    concatenate files, respectively, for use by
    the Python embedded zipfile code.
src/SConscript:
    Encapsulate environment creation in a function.
    Add code to append Python zip archive to final executable.
    Eliminate references to obsolete files.
src/python/SConscript:
    Rewrite to generate embedded zip archive of Python code
    (replacing old "embedded string" mechanism).
src/python/m5/__init__.py:
    Move main arg-parsing loop here (out of C++ main()).
src/python/m5/config.py:
    Minor fix (version incompatibility?).
src/sim/main.cc:
    Invoke embedded Python interpreter to parse args
    and generate config.ini, replacing C++ arg parsing code.

--HG--
extra : convert_revision : 72d21236b2bee139ff39ba4cf031a4a1f8560029

5 files changed, 228 insertions, 375 deletions

diff --git a/src/SConscript b/src/SConscript
index 43bd5d102..097acfe13 100644
--- a/src/SConscript
+++ b/src/SConscript
@@ -46,9 +46,7 @@ Import('env')
 
 base_sources = Split('''
 	base/circlebuf.cc
-	base/copyright.cc
 	base/cprintf.cc
-        base/embedfile.cc
 	base/fast_alloc.cc
 	base/fifo_buffer.cc
 	base/hostinfo.cc
@@ -99,9 +97,6 @@ base_sources = Split('''
         mem/port.cc
         mem/request.cc
 
-        python/pyconfig.cc
-        python/embedded_py.cc
-
 	sim/builder.cc
 	sim/configfile.cc
 	sim/debug.cc
@@ -356,43 +351,45 @@ def make_objs(sources, env):
 # files.
 env.Append(CPPPATH='.')
 
+# List of constructed environments to pass back to SConstruct
+envList = []
+
+# Function to create a new build environment as clone of current
+# environment 'env' with modified object suffix and optional stripped
+# binary.  Additional keyword arguments are appended to corresponding
+# build environment vars.
+def makeEnv(label, objsfx, strip = False, **kwargs):
+    newEnv = env.Copy(OBJSUFFIX=objsfx)
+    newEnv.Label = label
+    newEnv.Append(**kwargs)
+    exe = 'm5.' + label  # final executable
+    bin = exe + '.bin'   # executable w/o appended Python zip archive
+    newEnv.Program(bin, make_objs(sources, newEnv))
+    if strip:
+        stripped_bin = bin + '.stripped'
+        newEnv.Command(stripped_bin, bin, 'strip $SOURCE -o $TARGET')
+        bin = stripped_bin
+    targets = newEnv.Concat(exe, [bin, 'python/m5py.zip'])
+    newEnv.M5Binary = targets[0]
+    envList.append(newEnv)
+
 # Debug binary
-debugEnv = env.Copy(OBJSUFFIX='.do')
-debugEnv.Label = 'debug'
-debugEnv.Append(CCFLAGS=Split('-g3 -gdwarf-2 -O0'))
-debugEnv.Append(CPPDEFINES='DEBUG')
-tlist = debugEnv.Program(target = 'm5.debug',
-                         source = make_objs(sources, debugEnv))
-debugEnv.M5Binary = tlist[0]
+makeEnv('debug', '.do',
+        CCFLAGS = Split('-g3 -gdwarf-2 -O0'),
+        CPPDEFINES = 'DEBUG')
 
 # Optimized binary
-optEnv = env.Copy()
-optEnv.Label = 'opt'
-optEnv.Append(CCFLAGS=Split('-g -O3'))
-tlist = optEnv.Program(target = 'm5.opt',
-                       source = make_objs(sources, optEnv))
-optEnv.M5Binary = tlist[0]
+makeEnv('opt', '.o',
+        CCFLAGS = Split('-g -O3'))
 
 # "Fast" binary
-fastEnv = env.Copy(OBJSUFFIX='.fo')
-fastEnv.Label = 'fast'
-fastEnv.Append(CCFLAGS=Split('-O3'))
-fastEnv.Append(CPPDEFINES='NDEBUG')
-fastEnv.Program(target = 'm5.fast.unstripped',
-                source = make_objs(sources, fastEnv))
-tlist = fastEnv.Command(target = 'm5.fast',
-                        source = 'm5.fast.unstripped',
-                        action = 'strip $SOURCE -o $TARGET')
-fastEnv.M5Binary = tlist[0]
+makeEnv('fast', '.fo', strip = True,
+        CCFLAGS = Split('-O3'),
+        CPPDEFINES = 'NDEBUG')
 
 # Profiled binary
-profEnv = env.Copy(OBJSUFFIX='.po')
-profEnv.Label = 'prof'
-profEnv.Append(CCFLAGS=Split('-O3 -g -pg'), LINKFLAGS='-pg')
-tlist = profEnv.Program(target = 'm5.prof',
-                        source = make_objs(sources, profEnv))
-profEnv.M5Binary = tlist[0]
-
-envList = [debugEnv, optEnv, fastEnv, profEnv]
+makeEnv('prof', '.po',
+        CCFLAGS = Split('-O3 -g -pg'),
+        LINKFLAGS = '-pg')
 
 Return('envList')
diff --git a/src/python/SConscript b/src/python/SConscript
index 4407e403d..1f2d7fe0e 100644
--- a/src/python/SConscript
+++ b/src/python/SConscript
@@ -27,126 +27,55 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import os, os.path, re, sys
+from zipfile import PyZipFile
 
-Import('env')
+# handy function for path joins
+def join(*args):
+    return os.path.normpath(os.path.join(*args))
 
-import scons_helper
-
-def WriteEmbeddedPyFile(target, source, path, name, ext, filename):
-    if isinstance(source, str):
-        source = file(source, 'r')
-
-    if isinstance(target, str):
-        target = file(target, 'w')
-
-    print >>target, "AddModule(%s, %s, %s, %s, '''\\" % \
-          (`path`, `name`, `ext`, `filename`)
-
-    for line in source:
-        line = line
-        # escape existing backslashes
-        line = line.replace('\\', '\\\\')
-        # escape existing triple quotes
-        line = line.replace("'''", r"\'\'\'")
-
-        print >>target, line,
-
-    print >>target, "''')"
-    print >>target
-
-def WriteCFile(target, source, name):
-    if isinstance(source, str):
-        source = file(source, 'r')
-
-    if isinstance(target, str):
-        target = file(target, 'w')
-
-    print >>target, 'const char %s_string[] = {' % name
-
-    count = 0
-    from array import array
-    try:
-        while True:
-            foo = array('B')
-            foo.fromfile(source, 10000)
-            l = [ str(i) for i in foo.tolist() ]
-            count += len(l)
-            for i in xrange(0,9999,20):
-                print >>target, ','.join(l[i:i+20]) + ','
-    except EOFError:
-        l = [ str(i) for i in foo.tolist() ]
-        count += len(l)
-        for i in xrange(0,len(l),20):
-            print >>target, ','.join(l[i:i+20]) + ','
-        print >>target, ','.join(l[i:]) + ','
-
-    print >>target, '};'
-    print >>target, 'const int %s_length = %d;' % (name, count)
-    print >>target
-
-def splitpath(path):
-    dir,file = os.path.split(path)
-    path = []
-    assert(file)
-    while dir:
-        dir,base = os.path.split(dir)
-        path.insert(0, base)
-    return path, file
-
-def MakeEmbeddedPyFile(target, source, env):
-    target = file(str(target[0]), 'w')
-   
-    tree = {}
-    for src in source:
-        src = str(src)
-        path,pyfile = splitpath(src)
-        node = tree
-        for dir in path:
-            if not node.has_key(dir):
-                node[dir] = { }
-            node = node[dir]
-
-        name,ext = pyfile.split('.')
-        if name == '__init__':
-            node['.hasinit'] = True
-        node[pyfile] = (src,name,ext,src)
-
-    done = False
-    while not done:
-        done = True
-        for name,entry in tree.items():
-            if not isinstance(entry, dict): continue
-            if entry.has_key('.hasinit'): continue
-
-            done = False
-            del tree[name]
-            for key,val in entry.iteritems():
-                if tree.has_key(key):
-                    raise NameError, \
-                          "dir already has %s can't add it again" % key
-                tree[key] = val
-
-    files = []
-    def populate(node, path = []):
-        names = node.keys()
-        names.sort()
-        for name in names:
-            if name == '.hasinit':
-                continue
-            
-            entry = node[name]
-            if isinstance(entry, dict):
-                if not entry.has_key('.hasinit'):
-                    raise NameError, 'package directory missing __init__.py'
-                populate(entry, path + [ name ])
-            else:
-                pyfile,name,ext,filename = entry
-                files.append((pyfile, path, name, ext, filename))
-    populate(tree)
-
-    for pyfile, path, name, ext, filename in files:
-        WriteEmbeddedPyFile(target, pyfile, path, name, ext, filename)
+Import('env')
 
+# This SConscript is in charge of collecting .py files and generating a zip archive that is appended to the m5 binary.
+
+# Copy .py source files here (relative to src/python in the build
+# directory).
+pyzip_root = 'zip'
+
+# List of files & directories to include in the zip file.  To include
+# a package, list only the root directory of the package, not any
+# internal .py files (else they will get the path stripped off when
+# they are imported into the zip file).
+pyzip_files = []
+
+# List of additional files on which the zip archive depends, but which
+# are not included in pyzip_files... i.e. individual .py files within
+# a package.
+pyzip_dep_files = []
+
+# Add the specified package to the zip archive.  Adds the directory to
+# pyzip_files and all included .py files to pyzip_dep_files.
+def addPkg(pkgdir):
+    pyzip_files.append(join(pyzip_root, pkgdir))
+    origdir = os.getcwd()
+    srcdir = join(Dir('.').srcnode().abspath, pkgdir)
+    os.chdir(srcdir)
+    for path, dirs, files in os.walk('.'):
+        for i,dir in enumerate(dirs):
+            if dir == 'SCCS':
+                del dirs[i]
+                break
+
+        for f in files:
+            if f.endswith('.py'):
+                source = join(pkgdir, path, f)
+                target = join(pyzip_root, source)
+                pyzip_dep_files.append(target)
+                env.CopyFile(target, source)
+
+    os.chdir(origdir)
+
+# Generate Python file that contains a dict specifying the current
+# build_env flags.
 def MakeDefinesPyFile(target, source, env):
     f = file(str(target[0]), 'w')
     print >>f, "import __main__"
@@ -154,54 +83,21 @@ def MakeDefinesPyFile(target, source, env):
     print >>f, source[0]
     f.close()
 
-CFileCounter = 0
-def MakePythonCFile(target, source, env):
-    global CFileCounter
-    target = file(str(target[0]), 'w')
-
-    print >>target, '''\
-#include "base/embedfile.hh"
-
-namespace {
-'''
-    for src in source:
-        src = str(src)
-        fname = os.path.basename(src)
-        name = 'embedded_file%d' % CFileCounter
-        CFileCounter += 1
-        WriteCFile(target, src, name)
-        print >>target, '''\
-EmbedMap %(name)s("%(fname)s",
-    %(name)s_string, %(name)s_length);
-
-''' % locals()
-    print >>target, '''\
-
-/* namespace */ }
-'''
-
-# base list of .py files to embed
-embedded_py_files = [ os.path.join(env['ROOT'], 'util/pbs/jobfile.py') ]
-# add all .py files in python/m5 
-objpath = os.path.join(env['SRCDIR'], 'python', 'm5')
-for root, dirs, files in os.walk(objpath, topdown=True):
-    for i,dir in enumerate(dirs):
-        if dir == 'SCCS':
-            del dirs[i]
-            break
-
-    assert(root.startswith(objpath))
-    for f in files:
-        if f.endswith('.py'):
-            embedded_py_files.append(os.path.join(root, f))
-
-embedfile_hh = os.path.join(env['SRCDIR'], 'base/embedfile.hh')
-
 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',
-            ['string_importer.py', 'defines.py', 'embedded_py.py'],
-            MakePythonCFile)
+# Now specify the packages & files for the zip archive.
+addPkg('m5')
+pyzip_files.append('defines.py')
+pyzip_files.append(join(env['ROOT'], 'util/pbs/jobfile.py'))
+
+# Action function to build the zip archive.  Uses the PyZipFile module
+# included in the standard Python library.
+def buildPyZip(target, source, env):
+    pzf = PyZipFile(str(target[0]), 'w')
+    for s in source:
+        pzf.writepy(str(s))
+
+# Add the zip file target to the environment.
+env.Command('m5py.zip', pyzip_files, buildPyZip)
+env.Depends('m5py.zip', pyzip_dep_files)
diff --git a/src/python/m5/__init__.py b/src/python/m5/__init__.py
index 9bb68a090..06875d1f0 100644
--- a/src/python/m5/__init__.py
+++ b/src/python/m5/__init__.py
@@ -24,7 +24,53 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-import sys, os
+import sys, os, time
+
+import __main__
+
+briefCopyright = '''
+Copyright (c) 2001-2006
+The Regents of The University of Michigan
+All Rights Reserved
+'''
+
+fullCopyright = '''
+Copyright (c) 2001-2006
+The Regents of The University of Michigan
+All Rights Reserved
+
+Permission is granted to use, copy, create derivative works and
+redistribute this software and such derivative works for any purpose,
+so long as the copyright notice above, this grant of permission, and
+the disclaimer below appear in all copies made; and so long as the
+name of The University of Michigan is not used in any advertising or
+publicity pertaining to the use or distribution of this software
+without specific, written prior authorization.
+
+THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE
+UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND WITHOUT
+WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER EXPRESS OR
+IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE REGENTS OF
+THE UNIVERSITY OF MICHIGAN SHALL NOT BE LIABLE FOR ANY DAMAGES,
+INCLUDING DIRECT, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WITH RESPECT TO ANY CLAIM ARISING OUT OF OR IN CONNECTION
+WITH THE USE OF THE SOFTWARE, EVEN IF IT HAS BEEN OR IS HEREAFTER
+ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+'''
+
+def sayHello(f):
+    print >> f, "M5 Simulator System"
+    print >> f, briefCopyright
+    print >> f, "M5 compiled on", __main__.compileDate
+    hostname = os.environ.get('HOSTNAME')
+    if not hostname:
+        hostname = os.environ.get('HOST')
+    if hostname:
+        print >> f, "M5 executing on", hostname
+    print >> f, "M5 simulation started", time.ctime()
+
+sayHello(sys.stderr)
 
 # define this here so we can use it right away if necessary
 def panic(string):
@@ -72,3 +118,63 @@ from config import *
 # import the built-in object definitions
 from objects import *
 
+
+args_left = sys.argv[1:]
+configfile_found = False
+
+while args_left:
+    arg = args_left.pop(0)
+    if arg.startswith('--'):
+        # if arg starts with '--', parse as a special python option
+        # of the format --<python var>=<string value>
+        try:
+            (var, val) = arg.split('=', 1)
+        except ValueError:
+            panic("Could not parse configuration argument '%s'\n"
+                  "Expecting --<variable>=<value>\n" % arg);
+        eval("%s = %s" % (var, repr(val)))
+    elif arg.startswith('-'):
+        # if the arg starts with '-', it should be a simulator option
+        # with a format similar to getopt.
+        optchar = arg[1]
+        if len(arg) > 2:
+            args_left.insert(0, arg[2:])
+        if optchar == 'd':
+            outdir = args_left.pop(0)
+        elif optchar == 'h':
+            showBriefHelp(sys.stderr)
+            sys.exit(1)
+        elif optchar == 'E':
+            env_str = args_left.pop(0)
+            split_result = env_str.split('=', 1)
+            var = split_result[0]
+            if len(split_result == 2):
+                val = split_result[1]
+            else:
+                val = True
+            env[var] = val
+        elif optchar == 'I':
+            AddToPath(args_left.pop(0))
+        elif optchar == 'P':
+            eval(args_left.pop(0))
+        else:
+            showBriefHelp(sys.stderr)
+            panic("invalid argument '%s'\n" % arg_str)
+    else:
+        # In any other case, treat the option as a configuration file
+        # name and load it.
+        if not arg.endswith('.py'):
+            panic("Config file '%s' must end in '.py'\n" % arg)
+        configfile_found = True
+        m5execfile(arg, globals())
+
+
+if not configfile_found:
+    panic("no configuration file specified!")
+
+if globals().has_key('root') and isinstance(root, Root):
+    sys.stdout = file('config.ini', 'w')
+    instantiate(root)
+else:
+    print 'Instantiation skipped: no root object found.'
+
diff --git a/src/python/m5/config.py b/src/python/m5/config.py
index 1e25e0d09..ce7e5a964 100644
--- a/src/python/m5/config.py
+++ b/src/python/m5/config.py
@@ -794,7 +794,7 @@ class ParamFactory(object):
 
     # E.g., Param.Int(5, "number of widgets")
     def __call__(self, *args, **kwargs):
-        caller_frame = inspect.stack()[1][0]
+        caller_frame = inspect.currentframe().f_back
         ptype = None
         try:
             ptype = eval(self.ptype_str,
diff --git a/src/sim/main.cc b/src/sim/main.cc
index aecc171ed..a4e8a1f77 100644
--- a/src/sim/main.cc
+++ b/src/sim/main.cc
@@ -29,6 +29,8 @@
 ///
 /// @file sim/main.cc
 ///
+#include <Python.h>	// must be before system headers... see Python docs
+
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <errno.h>
@@ -40,8 +42,6 @@
 #include <string>
 #include <vector>
 
-#include "base/copyright.hh"
-#include "base/embedfile.hh"
 #include "base/inifile.hh"
 #include "base/misc.hh"
 #include "base/output.hh"
@@ -51,7 +51,6 @@
 #include "base/time.hh"
 #include "cpu/base.hh"
 #include "cpu/smt.hh"
-#include "python/pyconfig.hh"
 #include "sim/async.hh"
 #include "sim/builder.hh"
 #include "sim/configfile.hh"
@@ -111,50 +110,6 @@ abortHandler(int sigtype)
 /// Simulator executable name
 char *myProgName = "";
 
-/// Show brief help message.
-void
-showBriefHelp(ostream &out)
-{
-    char *prog = basename(myProgName);
-
-    ccprintf(out, "Usage:\n");
-    ccprintf(out,
-"%s [-d <dir>] [-E <var>[=<val>]] [-I <dir>] [-P <python>]\n"
-"        [--<var>=<val>] <config file>\n"
-"\n"
-"   -d            set the output directory to <dir>\n"
-"   -E            set the environment variable <var> to <val> (or 'True')\n"
-"   -I            add the directory <dir> to python's path\n"
-"   -P            execute <python> directly in the configuration\n"
-"   --var=val     set the python variable <var> to '<val>'\n"
-"   <configfile>  config file name (ends in .py)\n\n",
-             prog);
-
-    ccprintf(out, "%s -X\n   -X            extract embedded files\n\n", prog);
-    ccprintf(out, "%s -h\n   -h            print short help\n\n", prog);
-}
-
-/// Print welcome message.
-void
-sayHello(ostream &out)
-{
-    extern const char *compileDate;	// from date.cc
-
-    ccprintf(out, "M5 Simulator System\n");
-    // display copyright
-    ccprintf(out, "%s\n", briefCopyright);
-    ccprintf(out, "M5 compiled on %d\n", compileDate);
-
-    char *host = getenv("HOSTNAME");
-    if (!host)
-        host = getenv("HOST");
-
-    if (host)
-        ccprintf(out, "M5 executing on %s\n", host);
-
-    ccprintf(out, "M5 simulation started %s\n", Time::start);
-}
-
 ///
 /// Echo the command line for posterity in such a way that it can be
 /// used to rerun the same simulation (given the same .ini files).
@@ -191,19 +146,7 @@ echoCommandLine(int argc, char **argv, ostream &out)
     out << endl << endl;
 }
 
-char *
-getOptionString(int &index, int argc, char **argv)
-{
-    char *option = argv[index] + 2;
-    if (*option != '\0')
-        return option;
-
-    // We didn't find an argument, it must be in the next variable.
-    if (++index >= argc)
-        panic("option string for option '%s' not found", argv[index - 1]);
-
-    return argv[index];
-}
+#include "config/python_build_env.hh"
 
 int
 main(int argc, char **argv)
@@ -218,121 +161,37 @@ main(int argc, char **argv)
     signal(SIGINT, exitNowHandler);		// dump final stats and exit
     signal(SIGABRT, abortHandler);
 
-    bool configfile_found = false;
-    PythonConfig pyconfig;
-    string outdir;
-
-    if (argc < 2) {
-        showBriefHelp(cerr);
-        exit(1);
-    }
-
-    sayHello(cerr);
-
-    // Parse command-line options.
-    // Since most of the complex options are handled through the
-    // config database, we don't mess with getopts, and just parse
-    // manually.
-    for (int i = 1; i < argc; ++i) {
-        char *arg_str = argv[i];
-
-        // if arg starts with '--', parse as a special python option
-        // of the format --<python var>=<string value>, if the arg
-        // starts with '-', it should be a simulator option with a
-        // format similar to getopt.  In any other case, treat the
-        // option as a configuration file name and load it.
-        if (arg_str[0] == '-' && arg_str[1] == '-') {
-            string str = &arg_str[2];
-            string var, val;
-
-            if (!split_first(str, var, val, '='))
-                panic("Could not parse configuration argument '%s'\n"
-                      "Expecting --<variable>=<value>\n", arg_str);
-
-            pyconfig.setVariable(var, val);
-        } else if (arg_str[0] == '-') {
-            char *option;
-            string var, val;
-
-            // switch on second char
-            switch (arg_str[1]) {
-              case 'd':
-                outdir = getOptionString(i, argc, argv);
-                break;
-
-              case 'h':
-                showBriefHelp(cerr);
-                exit(1);
-
-              case 'E':
-                option = getOptionString(i, argc, argv);
-                if (!split_first(option, var, val, '='))
-                    val = "True";
-
-                if (setenv(var.c_str(), val.c_str(), true) == -1)
-                    panic("setenv: %s\n", strerror(errno));
-                break;
-
-              case 'I':
-                option = getOptionString(i, argc, argv);
-                pyconfig.addPath(option);
-                break;
-
-              case 'P':
-                option = getOptionString(i, argc, argv);
-                pyconfig.writeLine(option);
-                break;
-
-              case 'X': {
-                  list<EmbedFile> lst;
-                  EmbedMap::all(lst);
-                  list<EmbedFile>::iterator i = lst.begin();
-                  list<EmbedFile>::iterator end = lst.end();
-
-                  while (i != end) {
-                      cprintf("Embedded File: %s\n", i->name);
-                      cout.write(i->data, i->length);
-                      ++i;
-                  }
-
-                  return 0;
-              }
-
-              default:
-                showBriefHelp(cerr);
-                panic("invalid argument '%s'\n", arg_str);
-            }
-        } else {
-            string file(arg_str);
-            string base, ext;
+    // Python embedded interpreter invocation
+    Py_SetProgramName(argv[0]);
+    const char *fileName = Py_GetProgramFullPath();
+    Py_Initialize();
+    PySys_SetArgv(argc, argv);
 
-            if (!split_last(file, base, ext, '.') || ext != "py")
-                panic("Config file '%s' must end in '.py'\n", file);
+    // loadSwigModules();
 
-            pyconfig.load(file);
-            configfile_found = true;
-        }
-    }
+    // Set Python module path to include current file to find embedded
+    // zip archive
+    PyRun_SimpleString("import sys");
+    string pathCmd = csprintf("sys.path[1:1] = ['%s']", fileName);
+    PyRun_SimpleString(pathCmd.c_str());
 
-    if (outdir.empty()) {
-        char *env = getenv("OUTPUT_DIR");
-        outdir = env ? env : ".";
-    }
-
-    simout.setDirectory(outdir);
+    // Pass compile timestamp string to Python
+    extern const char *compileDate;	// from date.cc
+    string setCompileDate = csprintf("compileDate = '%s'", compileDate);
+    PyRun_SimpleString(setCompileDate.c_str());
 
-    char *env = getenv("CONFIG_OUTPUT");
-    if (!env)
-        env = "config.out";
-    configStream = simout.find(env);
+    // PyRun_InteractiveLoop(stdin, "stdin");
+    // m5/__init__.py currently contains main argv parsing loop etc.,
+    // and will write out config.ini file before returning.
+    PyImport_ImportModule("defines");
+    PyImport_ImportModule("m5");
+    Py_Finalize();
 
-    if (!configfile_found)
-        panic("no configuration file specified!");
+    configStream = simout.find("config.out");
 
     // The configuration database is now complete; start processing it.
     IniFile inifile;
-    if (!pyconfig.output(inifile))
-        panic("Error processing python code");
+    inifile.load("config.ini");
 
     // Initialize statistics database
     Stats::InitSimStats();
@@ -346,11 +205,6 @@ main(int argc, char **argv)
     ParamContext::parseAllContexts(inifile);
     ParamContext::checkAllContexts();
 
-    // Print hello message to stats file if it's actually a file.  If
-    // it's not (i.e. it's cout or cerr) then we already did it above.
-    if (simout.isFile(*outputStream))
-        sayHello(*outputStream);
-
     // Echo command line and all parameter settings to stats file as well.
     echoCommandLine(argc, argv, *outputStream);
     ParamContext::showAllContexts(*configStream);