diff --git a/tools/building.py b/tools/building.py
index 18ec7f1883eba15b136a328c3ff81ca1e50430be..fcc9c400242f9e2336de8d61d274a9fd445635c5 100644
--- a/tools/building.py
+++ b/tools/building.py
@@ -27,6 +27,7 @@
 import os
 import sys
 import string
+import utils
 
 from SCons.Script import *
 from utils import _make_path_relative
@@ -233,7 +234,7 @@ def PrepareBuilding(env, root_directory, has_libcpu=False, remove_components = [
             rtconfig.CROSS_TOOL, rtconfig.PLATFORM = tgt_dict[tgt_name]
             # replace the 'RTT_CC' to 'CROSS_TOOL'
             os.environ['RTT_CC'] = rtconfig.CROSS_TOOL
-            reload(rtconfig)
+            utils.ReloadModule(rtconfig)
         except KeyError:
             print ('Unknow target: '+ tgt_name+'. Avaible targets: ' +', '.join(tgt_dict.keys()))
             sys.exit(1)
@@ -246,7 +247,7 @@ def PrepareBuilding(env, root_directory, has_libcpu=False, remove_components = [
         if 'RTT_EXEC_PATH' in os.environ:
             # del the 'RTT_EXEC_PATH' and using the 'EXEC_PATH' setting on rtconfig.py
             del os.environ['RTT_EXEC_PATH']
-            reload(rtconfig)
+            utils.ReloadModule(rtconfig)
 
     # add compability with Keil MDK 4.6 which changes the directory of armcc.exe
     if rtconfig.PLATFORM == 'armcc':
@@ -407,7 +408,7 @@ def PrepareModuleBuilding(env, root_directory, bsp_directory):
 
     # parse bsp rtconfig.h to get used component
     PreProcessor = PatchedPreProcessor()
-    f = file(bsp_directory + '/rtconfig.h', 'r')
+    f = open(bsp_directory + '/rtconfig.h', 'r')
     contents = f.read()
     f.close()
     PreProcessor.process_contents(contents)
@@ -458,7 +459,7 @@ def LocalOptions(config_filename):
     # parse wiced_config.h to get used component
     PreProcessor = SCons.cpp.PreProcessor()
 
-    f = file(config_filename, 'r')
+    f = open(config_filename, 'r')
     contents = f.read()
     f.close()
 
@@ -573,6 +574,10 @@ def DefineGroup(name, src, depend, **parameters):
     if 'CCFLAGS' in group:
         Env.AppendUnique(CCFLAGS = group['CCFLAGS'])
     if 'CPPPATH' in group:
+        paths = []
+        for item in group['CPPPATH']:
+            paths.append(os.path.abspath(item))
+        group['CPPPATH'] = paths
         Env.AppendUnique(CPPPATH = group['CPPPATH'])
     if 'CPPDEFINES' in group:
         Env.AppendUnique(CPPDEFINES = group['CPPDEFINES'])
@@ -580,6 +585,18 @@ def DefineGroup(name, src, depend, **parameters):
         Env.AppendUnique(LINKFLAGS = group['LINKFLAGS'])
     if 'ASFLAGS' in group:
         Env.AppendUnique(ASFLAGS = group['ASFLAGS'])
+    if 'LOCAL_CPPPATH' in group:
+        paths = []
+        for item in group['LOCAL_CPPPATH']:
+            paths.append(os.path.abspath(item))
+        group['LOCAL_CPPPATH'] = paths
+
+    import rtconfig
+    if rtconfig.PLATFORM == 'gcc':
+        if 'CCFLAGS' in group:
+            group['CCFLAGS'] = utils.GCCC99Patch(group['CCFLAGS'])
+        if 'LOCAL_CCFLAGS' in group:
+            group['LOCAL_CCFLAGS'] = utils.GCCC99Patch(group['LOCAL_CCFLAGS'])
 
     # check whether to clean up library
     if GetOption('cleanlib') and os.path.exists(os.path.join(group['path'], GroupLibFullName(name, Env))):
@@ -863,7 +880,7 @@ def GetVersion():
 
     # parse rtdef.h to get RT-Thread version
     prepcessor = PatchedPreProcessor()
-    f = file(rtdef, 'r')
+    f = open(rtdef, 'r')
     contents = f.read()
     f.close()
     prepcessor.process_contents(contents)
diff --git a/tools/cdk.py b/tools/cdk.py
index 8f995981aafd1bbfa9190d6bd8f513f86be2ef83..09ac934ad3a4529493d0543ebc9b3515721dd9ca 100644
--- a/tools/cdk.py
+++ b/tools/cdk.py
@@ -56,7 +56,7 @@ def _CDKProject(tree, target, script):
     project_path = os.path.dirname(os.path.abspath(target))
 
     root = tree.getroot()
-    out = file(target, 'wb')
+    out = open(target, 'w')
     out.write('<?xml version="1.0" encoding="UTF-8"?>\n')
 
     CPPPATH = []
@@ -73,28 +73,28 @@ def _CDKProject(tree, target, script):
         group_tree = SDKAddGroup(ProjectFiles, root, group['name'], group['src'], project_path)
 
         # get each include path
-        if group.has_key('CPPPATH') and group['CPPPATH']:
+        if 'CPPPATH' in group and group['CPPPATH']:
             if CPPPATH:
                 CPPPATH += group['CPPPATH']
             else:
                 CPPPATH += group['CPPPATH']
 
         # get each group's definitions
-        if group.has_key('CPPDEFINES') and group['CPPDEFINES']:
+        if 'CPPDEFINES' in group and group['CPPDEFINES']:
             if CPPDEFINES:
                 CPPDEFINES += group['CPPDEFINES']
             else:
                 CPPDEFINES += group['CPPDEFINES']
 
         # get each group's cc flags
-        if group.has_key('CCFLAGS') and group['CCFLAGS']:
+        if 'CCFLAGS' in group and group['CCFLAGS']:
             if CCFLAGS:
                 CCFLAGS += ' ' + group['CCFLAGS']
             else:
                 CCFLAGS += group['CCFLAGS']   
                 
         # get each group's link flags
-        if group.has_key('LINKFLAGS') and group['LINKFLAGS']:
+        if 'LINKFLAGS' in group and group['LINKFLAGS']:
             if LINKFLAGS:
                 LINKFLAGS += ' ' + group['LINKFLAGS']
             else:
diff --git a/tools/codeblocks.py b/tools/codeblocks.py
index c45a5dca91da568f7cdc59fb940790f16998a19e..6334f9b7cddd50bdf9d0be40f4b4ee4d863ccbe3 100644
--- a/tools/codeblocks.py
+++ b/tools/codeblocks.py
@@ -73,7 +73,7 @@ def CBProject(target, script, program):
     
     root = tree.getroot()
     
-    out = file(target, 'wb')
+    out = open(target, 'w')
     out.write('<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>\n')
     
     ProjectFiles = []
@@ -90,7 +90,7 @@ def CBProject(target, script, program):
 
     # SECTION 2. 
     # write head include path
-    if building.Env.has_key('CPPPATH'):
+    if 'CPPPATH' in building.Env:
         cpp_path = building.Env['CPPPATH']
         paths  = set()
         for path in cpp_path:
@@ -114,7 +114,7 @@ def CBProject(target, script, program):
         # write link flags
     '''
         # write lib dependence 
-        if building.Env.has_key('LIBS'):
+        if 'LIBS' in building.Env:
             for elem in tree.iter(tag='Tool'):
                 if elem.attrib['Name'] == 'VCLinkerTool':
                     break
@@ -123,7 +123,7 @@ def CBProject(target, script, program):
             elem.set('AdditionalDependencies', libs)
     
         # write lib include path
-        if building.Env.has_key('LIBPATH'):
+        if 'LIBPATH' in building.Env:
             lib_path = building.Env['LIBPATH']
             paths  = set()
             for path in lib_path:
diff --git a/tools/gcc.py b/tools/gcc.py
index 90e5a7dba8aea5169a24b83d3fc0cf114778c5e5..11751ebeecaf4929c6ae465310087e5f80b1fccc 100644
--- a/tools/gcc.py
+++ b/tools/gcc.py
@@ -105,26 +105,27 @@ def GCCResult(rtconfig, str):
         posix_thread = 0
 
         for line in stdout.split(b'\n'):
-            if re.search(b'fd_set', line):
+            line = line.decode()
+            if re.search('fd_set', line):
                 have_fdset = 1
 
             # check for sigal
-            if re.search(b'struct[ \t]+sigaction', line):
+            if re.search('struct[ \t]+sigaction', line):
                 have_sigaction = 1
-            if re.search(b'struct[ \t]+sigevent', line):
+            if re.search('struct[ \t]+sigevent', line):
                 have_sigevent = 1
-            if re.search(b'siginfo_t', line):
+            if re.search('siginfo_t', line):
                 have_siginfo = 1
-            if re.search(b'union[ \t]+sigval', line):
+            if re.search('union[ \t]+sigval', line):
                 have_sigval = 1
 
-            if re.search(b'char\* version', line):
-                version = re.search(br'\"([^"]+)\"', line).groups()[0]
+            if re.search('char\* version', line):
+                version = re.search(r'\"([^"]+)\"', line).groups()[0]
 
-            if re.findall(b'iso_c_visible = [\d]+', line):
+            if re.findall('iso_c_visible = [\d]+', line):
                 stdc = re.findall('[\d]+', line)[0]
 
-            if re.findall(b'pthread_create', line):
+            if re.findall('pthread_create', line):
                 posix_thread = 1
     
         if have_fdset:
diff --git a/tools/genconf.py b/tools/genconf.py
index de8681e1f8804343294f6c8308167bb0dd7ae336..d033c4007d6373b26f412debd7401d32b92a5084 100644
--- a/tools/genconf.py
+++ b/tools/genconf.py
@@ -6,7 +6,7 @@ def genconfig() :
     PreProcessor = SCons.cpp.PreProcessor()
 
     try:
-        f = file('rtconfig.h', 'r')
+        f = open('rtconfig.h', 'r')
         contents = f.read()
         f.close()
     except :
@@ -16,7 +16,7 @@ def genconfig() :
     options = PreProcessor.cpp_namespace
 
     try:
-        f = file('.config', 'w')
+        f = open('.config', 'w')
         for (opt, value) in options.items():
             if type(value) == type(1):
                 f.write("CONFIG_%s=%d\n" % (opt, value))
diff --git a/tools/iar.py b/tools/iar.py
index c77467a51f1d4f780c90e20e6bbfe24d619c0a6c..18a3cb83286698035c127391bccba089ed9a31e2 100644
--- a/tools/iar.py
+++ b/tools/iar.py
@@ -25,6 +25,7 @@
 import os
 import sys
 import string
+import utils
 
 import xml.etree.ElementTree as etree
 from xml.etree.ElementTree import SubElement
@@ -62,14 +63,14 @@ def IARAddGroup(parent, name, files, project_path):
         file_name = SubElement(file, 'name')
 
         if os.path.isabs(path):
-            file_name.text = path.decode(fs_encoding)
+            file_name.text = path # path.decode(fs_encoding)
         else:
-            file_name.text = ('$PROJ_DIR$\\' + path).decode(fs_encoding)
+            file_name.text = '$PROJ_DIR$\\' + path # ('$PROJ_DIR$\\' + path).decode(fs_encoding)
 
 def IARWorkspace(target):
     # make an workspace
     workspace = target.replace('.ewp', '.eww')
-    out = file(workspace, 'wb')
+    out = open(workspace, 'w')
     xml = iar_workspace % target
     out.write(xml)
     out.close()
@@ -80,7 +81,7 @@ def IARProject(target, script):
     tree = etree.parse('template.ewp')
     root = tree.getroot()
 
-    out = file(target, 'wb')
+    out = open(target, 'w')
 
     CPPPATH = []
     CPPDEFINES = []
@@ -105,18 +106,18 @@ def IARProject(target, script):
         IARAddGroup(root, group['name'], group['src'], project_path)
 
         # get each include path
-        if group.has_key('CPPPATH') and group['CPPPATH']:
+        if 'CPPPATH' in group and group['CPPPATH']:
             CPPPATH += group['CPPPATH']
 
         # get each group's definitions
-        if group.has_key('CPPDEFINES') and group['CPPDEFINES']:
+        if 'CPPDEFINES' in group and group['CPPDEFINES']:
             CPPDEFINES += group['CPPDEFINES']
 
         # get each group's link flags
-        if group.has_key('LINKFLAGS') and group['LINKFLAGS']:
+        if 'LINKFLAGS' in group and group['LINKFLAGS']:
             LINKFLAGS += group['LINKFLAGS']
 
-        if group.has_key('LIBS') and group['LIBS']:
+        if 'LIBS' in group and group['LIBS']:
             for item in group['LIBS']:
                 lib_path = searchLib(group)
                 if lib_path != '':
@@ -161,7 +162,7 @@ def IARProject(target, script):
                 state.text = path
 
     xml_indent(root)
-    out.write(etree.tostring(root, encoding='utf-8'))
+    out.write(etree.tostring(root, encoding='utf-8').decode())
     out.close()
 
     IARWorkspace(target)
@@ -176,14 +177,14 @@ def IARVersion():
         # backup environ
         old_environ = os.environ
         os.environ['RTT_CC'] = 'iar'
-        reload(rtconfig)
+        utils.ReloadModule(rtconfig)
 
         # get iar path
         path = rtconfig.EXEC_PATH
 
         # restore environ
         os.environ = old_environ
-        reload(rtconfig)
+        utils.ReloadModule(rtconfig)
 
         return path
 
diff --git a/tools/keil.py b/tools/keil.py
index 48aec80a41ef8f1a1e2f3c7017d1fe0612c2baec..59da25443057b79397f6abebee564aeacfbf8315 100644
--- a/tools/keil.py
+++ b/tools/keil.py
@@ -159,12 +159,12 @@ def MDK4AddGroup(ProjectFiles, parent, name, files, project_path):
         if ProjectFiles.count(obj_name):
             name = basename + '_' + name
         ProjectFiles.append(obj_name)
-        file_name.text = name.decode(fs_encoding)
+        file_name.text = name # name.decode(fs_encoding)
         file_type = SubElement(file, 'FileType')
         file_type.text = '%d' % _get_filetype(name)
         file_path = SubElement(file, 'FilePath')
 
-        file_path.text = path.decode(fs_encoding)
+        file_path.text = path # path.decode(fs_encoding)
 
     return group
 
@@ -173,7 +173,7 @@ def MDK45Project(tree, target, script):
     project_path = os.path.dirname(os.path.abspath(target))
 
     root = tree.getroot()
-    out = file(target, 'wb')
+    out = open(target, 'w')
     out.write('<?xml version="1.0" encoding="UTF-8" standalone="no" ?>\n')
 
     CPPPATH = []
@@ -191,51 +191,51 @@ def MDK45Project(tree, target, script):
         group_tree = MDK4AddGroup(ProjectFiles, groups, group['name'], group['src'], project_path)
 
         # for local CPPPATH/CPPDEFINES
-        if (group_tree != None) and (group.has_key('LOCAL_CPPPATH') or group.has_key('LOCAL_CCFLAGS') or group.has_key('LOCAL_CPPDEFINES')):
+        if (group_tree != None) and ('LOCAL_CPPPATH' in group or 'LOCAL_CCFLAGS' in group or 'LOCAL_CPPDEFINES' in group):
             GroupOption     = SubElement(group_tree,  'GroupOption')
             GroupArmAds     = SubElement(GroupOption, 'GroupArmAds')
             Cads            = SubElement(GroupArmAds, 'Cads')
             VariousControls = SubElement(Cads, 'VariousControls')
             MiscControls    = SubElement(VariousControls, 'MiscControls')
-            if group.has_key('LOCAL_CCFLAGS'):
+            if 'LOCAL_CCFLAGS' in group:
                 MiscControls.text = group['LOCAL_CCFLAGS']
             else:
                 MiscControls.text = ' '
             Define          = SubElement(VariousControls, 'Define')
-            if group.has_key('LOCAL_CPPDEFINES'):
+            if 'LOCAL_CPPDEFINES' in group:
                 Define.text     = ', '.join(set(group['LOCAL_CPPDEFINES']))
             else:
                 Define.text     = ' '
             Undefine        = SubElement(VariousControls, 'Undefine')
             Undefine.text   = ' '
             IncludePath     = SubElement(VariousControls, 'IncludePath')
-            if group.has_key('LOCAL_CPPPATH'):
+            if 'LOCAL_CPPPATH' in group:
                 IncludePath.text = ';'.join([_make_path_relative(project_path, os.path.normpath(i)) for i in group['LOCAL_CPPPATH']])
             else:
                 IncludePath.text = ' '
 
         # get each include path
-        if group.has_key('CPPPATH') and group['CPPPATH']:
+        if 'CPPPATH' in group and group['CPPPATH']:
             if CPPPATH:
                 CPPPATH += group['CPPPATH']
             else:
                 CPPPATH += group['CPPPATH']
 
         # get each group's definitions
-        if group.has_key('CPPDEFINES') and group['CPPDEFINES']:
+        if 'CPPDEFINES' in group and group['CPPDEFINES']:
             if CPPDEFINES:
                 CPPDEFINES += group['CPPDEFINES']
             else:
                 CPPDEFINES = group['CPPDEFINES']
 
         # get each group's link flags
-        if group.has_key('LINKFLAGS') and group['LINKFLAGS']:
+        if 'LINKFLAGS' in group and group['LINKFLAGS']:
             if LINKFLAGS:
                 LINKFLAGS += ' ' + group['LINKFLAGS']
             else:
                 LINKFLAGS += group['LINKFLAGS']
 
-        if group.has_key('LIBS') and group['LIBS']:
+        if 'LIBS' in group and group['LIBS']:
             for item in group['LIBS']:
                 lib_path = ''
                 for path_item in group['LIBPATH']:
@@ -260,7 +260,7 @@ def MDK45Project(tree, target, script):
     Misc.text = LINKFLAGS
 
     xml_indent(root)
-    out.write(etree.tostring(root, encoding='utf-8'))
+    out.write(etree.tostring(root, encoding='utf-8').decode())
     out.close()
 
 def MDK4Project(target, script):
@@ -294,10 +294,10 @@ def MDK5Project(target, script):
         shutil.copy2('template.uvoptx', 'project.uvoptx')
 
 def MDKProject(target, script):
-    template = file('template.Uv2', "rb")
+    template = open('template.Uv2', "r")
     lines = template.readlines()
 
-    project = file(target, "wb")
+    project = open(target, "w")
     project_path = os.path.dirname(os.path.abspath(target))
 
     line_index = 5
@@ -323,21 +323,21 @@ def MDKProject(target, script):
         # print group['name']
 
         # get each include path
-        if group.has_key('CPPPATH') and group['CPPPATH']:
+        if 'CPPPATH' in group and group['CPPPATH']:
             if CPPPATH:
                 CPPPATH += group['CPPPATH']
             else:
                 CPPPATH += group['CPPPATH']
 
         # get each group's definitions
-        if group.has_key('CPPDEFINES') and group['CPPDEFINES']:
+        if 'CPPDEFINES' in group and group['CPPDEFINES']:
             if CPPDEFINES:
                 CPPDEFINES += group['CPPDEFINES']
             else:
                 CPPDEFINES = group['CPPDEFINES']
 
         # get each group's link flags
-        if group.has_key('LINKFLAGS') and group['LINKFLAGS']:
+        if 'LINKFLAGS' in group and group['LINKFLAGS']:
             if LINKFLAGS:
                 LINKFLAGS += ' ' + group['LINKFLAGS']
             else:
diff --git a/tools/menuconfig.py b/tools/menuconfig.py
index 23c479932d11cb811fbb0a3d4f20cfade4a8bde7..ea221553d05a92640f0a6b9c0a2b2c7126cffe20 100644
--- a/tools/menuconfig.py
+++ b/tools/menuconfig.py
@@ -30,12 +30,12 @@ import shutil
 
 def mk_rtconfig(filename):
     try:
-        config = file(filename)
+        config = open(filename, 'r')
     except:
         print('open config:%s failed' % filename)
         return
 
-    rtconfig = file('rtconfig.h', 'wb')
+    rtconfig = open('rtconfig.h', 'w')
     rtconfig.write('#ifndef RT_CONFIG_H__\n')
     rtconfig.write('#define RT_CONFIG_H__\n\n')
 
@@ -131,7 +131,7 @@ def touch_env():
         os.mkdir(os.path.join(env_dir, 'local_pkgs'))
         os.mkdir(os.path.join(env_dir, 'packages'))
         os.mkdir(os.path.join(env_dir, 'tools'))
-        kconfig = file(os.path.join(env_dir, 'packages', 'Kconfig'), 'wb')
+        kconfig = open(os.path.join(env_dir, 'packages', 'Kconfig'), 'w')
         kconfig.close()
 
     if not os.path.exists(os.path.join(env_dir, 'packages', 'packages')):
@@ -150,7 +150,7 @@ def touch_env():
                       "********************************************************************************\n")
                 help_info()
             else:
-                kconfig = file(os.path.join(env_dir, 'packages', 'Kconfig'), 'wb')
+                kconfig = open(os.path.join(env_dir, 'packages', 'Kconfig'), 'w')
                 kconfig.write('source "$PKGS_DIR/packages/Kconfig"')
                 kconfig.close()
         except:
@@ -189,7 +189,7 @@ def touch_env():
             help_info()
 
     if sys.platform != 'win32':
-        env_sh = file(os.path.join(env_dir, 'env.sh'), 'w')
+        env_sh = open(os.path.join(env_dir, 'env.sh'), 'w')
         env_sh.write('export PATH=~/.env/tools/scripts:$PATH')
     else:
         if os.path.exists(os.path.join(env_dir, 'tools', 'scripts')):
diff --git a/tools/package.py b/tools/package.py
index 55b318b2a3575f46761cc1b06522e9d2a64066c2..d49303d0487a4a46e055695c5f009f18b1de1e11 100644
--- a/tools/package.py
+++ b/tools/package.py
@@ -28,7 +28,7 @@ from building import *
 
 def ExtendPackageVar(package, var):
     v = []
-    if not package.has_key(var):
+    if var not in package:
         return v
 
     for item in package[var]:
@@ -38,7 +38,7 @@ def ExtendPackageVar(package, var):
 
 def BuildPackage(package):
     import json
-    f = file(package)
+    f = open(package)
     package_json = f.read()
 
     # get package.json path
@@ -47,20 +47,20 @@ def BuildPackage(package):
     package = json.loads(package_json)
 
     # check package name 
-    if not package.has_key('name'):
+    if 'name' not in package:
         return []
 
     # get depends
     depend = ExtendPackageVar(package, 'depends')
 
     src = []
-    if package.has_key('source_files'):
+    if 'source_files' in package:
         for src_file in package['source_files']:
             src_file = os.path.join(cwd, src_file)
             src += Glob(src_file)
 
     CPPPATH = []
-    if package.has_key('CPPPATH'):
+    if 'CPPPATH' in package:
         for path in package['CPPPATH']:
             if path.startswith('/') and os.path.isdir(path):
                 CPPPATH = CPPPATH + [path]
diff --git a/tools/sconsui.py b/tools/sconsui.py
index 3542c362785069ae9be06b4b22b8e86e0eda8821..cd623f7fb5a2b769e60a2c6c10c1c9b30ba3603a 100644
--- a/tools/sconsui.py
+++ b/tools/sconsui.py
@@ -198,7 +198,7 @@ class SconsUI():
         
         setting_path = os.path.join(home, '.rtt_scons')
         if os.path.exists(setting_path):
-            setting = file(os.path.join(home, '.rtt_scons'))
+            setting = open(os.path.join(home, '.rtt_scons'))
             for line in setting:
                 line = line.replace('\n', '')
                 line = line.replace('\r', '')
@@ -215,7 +215,7 @@ class SconsUI():
             setting.close()
 
         # set  RT-Thread Root Directory according environ
-        if os.environ.has_key('RTT_ROOT'):
+        if 'RTT_ROOT' in os.environ:
             self.RTTRoot.set_path(os.environ['RTT_ROOT'])
         
         if self.RTTRoot.get_path() == '':
@@ -268,7 +268,7 @@ class SconsUI():
         else:
             home = os.environ['HOME']
 
-        setting = file(os.path.join(home, '.rtt_scons'), 'wb+')
+        setting = open(os.path.join(home, '.rtt_scons'), 'w+')
         # current comiler 
         # line = '%s=%s\n' % ('compiler', self.compilers.get()))
         line = '%s=%s\n' % ('compiler', 'iar')
diff --git a/tools/ua.py b/tools/ua.py
index 31d264103153fdcc08f3b575a591f41af414f895..0505f3596c16c48bbbce3abe6401558de9e8cd03 100644
--- a/tools/ua.py
+++ b/tools/ua.py
@@ -52,11 +52,11 @@ def PrepareUA(project, RTT_ROOT, BSP_ROOT):
 
         for group in project:
             # get each include path
-            if group.has_key('CPPPATH') and group['CPPPATH']:
+            if 'CPPPATH' in group and group['CPPPATH']:
                 CPPPATH += group['CPPPATH']
 
             # get each group's definitions
-            if group.has_key('CPPDEFINES') and group['CPPDEFINES']:
+            if 'CPPDEFINES' in group and group['CPPDEFINES']:
                 CPPDEFINES += group['CPPDEFINES']
 
         if len(CPPPATH):
diff --git a/tools/utils.py b/tools/utils.py
index fb151189d8e76d081b5aea9c8b4e6872ff9e499a..692cf36c6925b7368f6239c294b95bb63b846a9b 100644
--- a/tools/utils.py
+++ b/tools/utils.py
@@ -183,14 +183,14 @@ def ProjectInfo(env):
 
     for group in project:
         # get each files
-        if group.has_key('src') and group['src']:
+        if 'src' in group and group['src']:
             FILES += group['src']
 
         # get each include path
-        if group.has_key('CPPPATH') and group['CPPPATH']:
+        if 'CPPPATH' in group and group['CPPPATH']:
             CPPPATH += group['CPPPATH']
 
-    if env.has_key('CPPDEFINES'):
+    if 'CPPDEFINES' in env:
         CPPDEFINES = env['CPPDEFINES']
         CPPDEFINES = ListMap(CPPDEFINES)
 
@@ -243,3 +243,47 @@ def ProjectInfo(env):
     proj['CPPDEFINES']  = CPPDEFINES
 
     return proj
+
+def VersionCmp(ver1, ver2):
+    la = ver1.split('.')
+    lb = ver2.split('.')
+    f = 0
+    if len(la) > len(lb):
+        f = len(la)
+    else:
+        f = len(lb)
+    for i in range(f):
+        try:
+            if int(la[i]) > int(lb[i]):
+                return 1
+            elif int(la[i]) == int(lb[i]):
+                continue
+            else:
+                return -1
+        except IndexError as e:
+            if len(la) > len(lb):
+                return 1
+            else:
+                return -1
+    return 0
+
+def GCCC99Patch(cflags):
+    import building
+    gcc_version = building.GetDepend('GCC_VERSION')
+    if gcc_version:
+        gcc_version = gcc_version.replace('"', '')
+    if VersionCmp(gcc_version, "4.8.0"):
+        # remove -std=c99 after GCC 4.8.x
+        cflags = cflags.replace('-std=c99', '')
+
+    return cflags
+
+def ReloadModule(module):
+    import sys
+    if sys.version_info.major >= 3:
+        import importlib
+        importlib.reload(module)
+    else:
+        reload(module)
+
+    return
diff --git a/tools/vs.py b/tools/vs.py
index 43d25ec87f36f70f16d4f1b617bfdca6fe65399a..f51862b9d9a187d353d77d73df859b30ce2ba948 100644
--- a/tools/vs.py
+++ b/tools/vs.py
@@ -78,7 +78,7 @@ def VSProject(target, script, program):
     tree = etree.parse('template_vs2005.vcproj')
     root = tree.getroot()
     
-    out = file(target, 'wb')
+    out = open(target, 'w')
     out.write('<?xml version="1.0" encoding="UTF-8"?>\r\n')
     
     ProjectFiles = []
@@ -91,7 +91,7 @@ def VSProject(target, script, program):
 
     for group in script:
         libs = []
-        if group.has_key('LIBS') and group['LIBS']:
+        if 'LIBS' in group and group['LIBS']:
             for item in group['LIBS']:
                 lib_path = ''
                 for path_item in group['LIBPATH']:
@@ -111,7 +111,7 @@ def VSProject(target, script, program):
     VS_AddHeadFilesGroup(program, elem, project_path)
     
     # write head include path
-    if building.Env.has_key('CPPPATH'):
+    if 'CPPPATH' in building.Env:
         cpp_path = building.Env['CPPPATH']
         paths  = set()
         for path in cpp_path:
@@ -130,7 +130,7 @@ def VSProject(target, script, program):
         elem.set('AdditionalIncludeDirectories', cpp_path)
 
     # write cppdefinitons flags
-    if building.Env.has_key('CPPDEFINES'):
+    if 'CPPDEFINES' in building.Env:
         CPPDEFINES = building.Env['CPPDEFINES']
         definitions = []
         if type(CPPDEFINES[0]) == type(()):
@@ -143,7 +143,7 @@ def VSProject(target, script, program):
     # write link flags
 
     # write lib dependence 
-    if building.Env.has_key('LIBS'):
+    if 'LIBS' in building.Env:
         for elem in tree.iter(tag='Tool'):
             if elem.attrib['Name'] == 'VCLinkerTool':
                 break
@@ -152,7 +152,7 @@ def VSProject(target, script, program):
         elem.set('AdditionalDependencies', libs)
 
     # write lib include path
-    if building.Env.has_key('LIBPATH'):
+    if 'LIBPATH' in building.Env:
         lib_path = building.Env['LIBPATH']
         paths  = set()
         for path in lib_path:
diff --git a/tools/vs2012.py b/tools/vs2012.py
index e8305e50348ad1d6319d7c799c11cba786e9d4b5..0c6b9d83d0dc1137cc45ef2debad2936ad4451db 100644
--- a/tools/vs2012.py
+++ b/tools/vs2012.py
@@ -168,7 +168,7 @@ def VS2012Project(target, script, program):
     VS_add_HeadFiles(program, elem, project_path)
 
     # write head include path
-    if building.Env.has_key('CPPPATH'):
+    if 'CPPPATH' in building.Env:
         cpp_path = building.Env['CPPPATH']
         paths = set()
         for path in cpp_path:
@@ -185,7 +185,7 @@ def VS2012Project(target, script, program):
             break
 
     # write cppdefinitons flags
-    if building.Env.has_key('CPPDEFINES'):
+    if 'CPPDEFINES' in building.Env:
         for elem in tree.iter(tag='PreprocessorDefinitions'):
             definitions = ';'.join(building.Env['CPPDEFINES']) + ';%(PreprocessorDefinitions)'
             elem.text = definitions
@@ -193,7 +193,7 @@ def VS2012Project(target, script, program):
     # write link flags
 
     # write lib dependence (Link)
-    if building.Env.has_key('LIBS'):
+    if 'LIBS' in building.Env:
         for elem in tree.iter(tag='AdditionalDependencies'):
             libs_with_extention = [i+'.lib' for i in building.Env['LIBS']]
             libs = ';'.join(libs_with_extention) + ';%(AdditionalDependencies)'
@@ -201,7 +201,7 @@ def VS2012Project(target, script, program):
             break
 
     # write lib include path
-    if building.Env.has_key('LIBPATH'):
+    if 'LIBPATH' in building.Env:
         lib_path = building.Env['LIBPATH']
         paths  = set()
         for path in lib_path:
diff --git a/tools/wizard.py b/tools/wizard.py
index d32f116a9b2bd579420e89068fca930661cfac7f..c5773527c6302740732d4ee8b9c098616371bb82 100644
--- a/tools/wizard.py
+++ b/tools/wizard.py
@@ -66,19 +66,19 @@ Return('objs')
 '''
 
 def usage():
-    print 'wizard --component name'
-    print 'wizard --bridge'
+    print('wizard --component name')
+    print('wizard --bridge')
 
 def gen_component(name):
-    print 'generate SConscript for ' + name
+    print('generate SConscript for ' + name)
     text = SConscript_com.replace('COMPONENT_NAME', name)
-    f = file('SConscript', 'w')
+    f = open('SConscript', 'w')
     f.write(text)
     f.close()
 
 def gen_bridge():
-    print 'generate SConscript for bridge'
-    f = file('SConscript', 'w')
+    print('generate SConscript for bridge')
+    f = open('SConscript', 'w')
     f.write(SConscript_bridge)
     f.close()