Pass all scons defined pre-processor macro variables to the

python configuration stuff as environment variables.

sim/pyconfig/SConscript:
    generate a python file that updates the env dict with all
    variables in the CPPDEFINES so the python code can use those
    variables in configuration scripts.

--HG--
extra : convert_revision : 50b0719b044f7adc87ce6ae1571d156ca0c5644c

sim/pyconfig/SConscript

@@ -144,6 +144,28 @@ def MakeEmbeddedPyFile(target, source, env):
     for pyfile, path, name, ext, filename in files:
         WriteEmbeddedPyFile(target, pyfile, path, name, ext, filename)
 
+def MakeDefinesPyFile(target, source, env):
+    target = file(str(target[0]), 'w')
+
+    defines = env['CPPDEFINES']
+    if isinstance(defines, list):
+        for var in defines:
+            if isinstance(var, tuple):
+                key,val = var
+            else:
+                key,val = var,'True'
+
+            if not isinstance(key, basestring):
+                panic("invalid type for define: %s" % type(key))
+                
+            print >>target, "env['%s'] = '%s'" % (key, val)
+
+    elif isinstance(defines, dict):
+        for key,val in defines.iteritems():
+            print >>target, "env['%s'] = '%s'" % (key, val)
+    else:
+        panic("invalid type for defines: %s" % type(defines))
+
 CFileCounter = 0
 def MakePythonCFile(target, source, env):
     global CFileCounter
@@ -184,7 +206,9 @@ 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)
 env.Command('embedded_py.py', embedded_py_files, MakeEmbeddedPyFile)
 env.Depends('embedded_py.cc', embedfile_hh)
-env.Command('embedded_py.cc', ['string_importer.py', 'embedded_py.py'],
+env.Command('embedded_py.cc',
+            ['string_importer.py', 'defines.py', 'embedded_py.py'],
             MakePythonCFile)