text: import os
  import os.path
  import sys
  import re
  import glob
  import string
  import subprocess
  from compat import iteritems, isbasestring, decode_utf8
  
  
  def add_source_files(self, sources, filetype, lib_env=None, shared=False):
  
      if isbasestring(filetype):
          dir_path = self.Dir('.').abspath
          filetype = sorted(glob.glob(dir_path + "/" + filetype))
  
      for path in filetype:
          sources.append(self.Object(path))
  
  
  def disable_warnings(self):
      # 'self' is the environment
      if self.msvc:
          # We have to remove existing warning level defines before appending /w,
          # otherwise we get: "warning D9025 : overriding '/W3' with '/w'"
          warn_flags = ['/Wall', '/W4', '/W3', '/W2', '/W1', '/WX']
          self['CCFLAGS'] = [x for x in self['CCFLAGS'] if not x in warn_flags]
          self.Append(CCFLAGS=['/w'])
      else:
          self.Append(CCFLAGS=['-w'])
  
  
  def add_module_version_string(self,s):
      self.module_version_string += "." + s
  
  
  def update_version(module_version_string=""):
  
      build_name = "custom_build"
      if os.getenv("BUILD_NAME") != None:
          build_name = os.getenv("BUILD_NAME")
          print("Using custom build name: " + build_name)
  
      import version
  
      # NOTE: It is safe to generate this file here, since this is still executed serially
      f = open("core/version_generated.gen.h", "w")
      f.write("#define VERSION_SHORT_NAME \"" + str(version.short_name) + "\"\n")
      f.write("#define VERSION_NAME \"" + str(version.name) + "\"\n")
      f.write("#define VERSION_MAJOR " + str(version.major) + "\n")
      f.write("#define VERSION_MINOR " + str(version.minor) + "\n")
      if hasattr(version, 'patch'):
          f.write("#define VERSION_PATCH " + str(version.patch) + "\n")
      f.write("#define VERSION_STATUS \"" + str(version.status) + "\"\n")
      f.write("#define VERSION_BUILD \"" + str(build_name) + "\"\n")
      f.write("#define VERSION_MODULE_CONFIG \"" + str(version.module_config) + module_version_string + "\"\n")
      f.write("#define VERSION_YEAR " + str(version.year) + "\n")
      f.close()
  
      # NOTE: It is safe to generate this file here, since this is still executed serially
      fhash = open("core/version_hash.gen.h", "w")
      githash = ""
      gitfolder = ".git"
  
      if os.path.isfile(".git"):
          module_folder = open(".git", "r").readline().strip()
          if module_folder.startswith("gitdir: "):
              gitfolder = module_folder[8:]
  
      if os.path.isfile(os.path.join(gitfolder, "HEAD")):
          head = open(os.path.join(gitfolder, "HEAD"), "r").readline().strip()
          if head.startswith("ref: "):
              head = os.path.join(gitfolder, head[5:])
              if os.path.isfile(head):
                  githash = open(head, "r").readline().strip()
          else:
              githash = head
  
      fhash.write("#define VERSION_HASH \"" + githash + "\"")
      fhash.close()
  
  
  def parse_cg_file(fname, uniforms, sizes, conditionals):
  
      fs = open(fname, "r")
      line = fs.readline()
  
      while line:
  
          if re.match(r"^\s*uniform", line):
  
              res = re.match(r"uniform ([\d\w]*) ([\d\w]*)")
              type = res.groups(1)
              name = res.groups(2)
  
              uniforms.append(name)
  
              if type.find("texobj") != -1:
                  sizes.append(1)
              else:
                  t = re.match(r"float(\d)x(\d)", type)
                  if t:
                      sizes.append(int(t.groups(1)) * int(t.groups(2)))
                  else:
                      t = re.match(r"float(\d)", type)
                      sizes.append(int(t.groups(1)))
  
              if line.find("[branch]") != -1:
                  conditionals.append(name)
  
          line = fs.readline()
  
      fs.close()
  
  
  def detect_modules():
  
      module_list = []
      includes_cpp = ""
      register_cpp = ""
      unregister_cpp = ""
  
      files = glob.glob("modules/*")
      files.sort()  # so register_module_types does not change that often, and also plugins are registered in alphabetic order
      for x in files:
          if not os.path.isdir(x):
              continue
          if not os.path.exists(x + "/config.py"):
              continue
          x = x.replace("modules/", "")  # rest of world
          x = x.replace("modules\\", "")  # win32
          module_list.append(x)
          try:
              with open("modules/" + x + "/register_types.h"):
                  includes_cpp += '#include "modules/' + x + '/register_types.h"\n'
                  register_cpp += '#ifdef MODULE_' + x.upper() + '_ENABLED\n'
                  register_cpp += '\tregister_' + x + '_types();\n'
                  register_cpp += '#endif\n'
                  unregister_cpp += '#ifdef MODULE_' + x.upper() + '_ENABLED\n'
                  unregister_cpp += '\tunregister_' + x + '_types();\n'
                  unregister_cpp += '#endif\n'
          except IOError:
              pass
  
      modules_cpp = """
  // modules.cpp - THIS FILE IS GENERATED, DO NOT EDIT!!!!!!!
  #include "register_module_types.h"
  
  """ + includes_cpp + """
  
  void register_module_types() {
  """ + register_cpp + """
  }
  
  void unregister_module_types() {
  """ + unregister_cpp + """
  }
  """
  
      # NOTE: It is safe to generate this file here, since this is still executed serially
      with open("modules/register_module_types.gen.cpp", "w") as f:
          f.write(modules_cpp)
  
      return module_list
  
  
  def win32_spawn(sh, escape, cmd, args, env):
      import subprocess
      newargs = ' '.join(args[1:])
      cmdline = cmd + " " + newargs
      startupinfo = subprocess.STARTUPINFO()
      for e in env:
          if type(env[e]) != type(""):
              env[e] = str(env[e])
      proc = subprocess.Popen(cmdline, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
                              stderr=subprocess.PIPE, startupinfo=startupinfo, shell=False, env=env)
      data, err = proc.communicate()
      rv = proc.wait()
      if rv:
          print("=====")
          print(err)
          print("=====")
      return rv
  
  """
  def win32_spawn(sh, escape, cmd, args, spawnenv):
  	import win32file
  	import win32event
  	import win32process
  	import win32security
  	for var in spawnenv:
  		spawnenv[var] = spawnenv[var].encode('ascii', 'replace')
  
  	sAttrs = win32security.SECURITY_ATTRIBUTES()
  	StartupInfo = win32process.STARTUPINFO()
  	newargs = ' '.join(map(escape, args[1:]))
  	cmdline = cmd + " " + newargs
  
  	# check for any special operating system commands
  	if cmd == 'del':
  		for arg in args[1:]:
  			win32file.DeleteFile(arg)
  		exit_code = 0
  	else:
  		# otherwise execute the command.
  		hProcess, hThread, dwPid, dwTid = win32process.CreateProcess(None, cmdline, None, None, 1, 0, spawnenv, None, StartupInfo)
  		win32event.WaitForSingleObject(hProcess, win32event.INFINITE)
  		exit_code = win32process.GetExitCodeProcess(hProcess)
  		win32file.CloseHandle(hProcess);
  		win32file.CloseHandle(hThread);
  	return exit_code
  """
  
  def disable_module(self):
      self.disabled_modules.append(self.current_module)
  
  def use_windows_spawn_fix(self, platform=None):
  
      if (os.name != "nt"):
          return  # not needed, only for windows
  
      # On Windows, due to the limited command line length, when creating a static library
      # from a very high number of objects SCons will invoke "ar" once per object file;
      # that makes object files with same names to be overwritten so the last wins and
      # the library looses symbols defined by overwritten objects.
      # By enabling quick append instead of the default mode (replacing), libraries will
      # got built correctly regardless the invocation strategy.
      # Furthermore, since SCons will rebuild the library from scratch when an object file
      # changes, no multiple versions of the same object file will be present.
      self.Replace(ARFLAGS='q')
  
      def mySubProcess(cmdline, env):
  
          startupinfo = subprocess.STARTUPINFO()
          startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
          proc = subprocess.Popen(cmdline, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
                                  stderr=subprocess.PIPE, startupinfo=startupinfo, shell=False, env=env)
          data, err = proc.communicate()
          rv = proc.wait()
          if rv:
              print("=====")
              print(err)
              print("=====")
          return rv
  
      def mySpawn(sh, escape, cmd, args, env):
  
          newargs = ' '.join(args[1:])
          cmdline = cmd + " " + newargs
  
          rv = 0
          env = {str(key): str(value) for key, value in iteritems(env)}
          if len(cmdline) > 32000 and cmd.endswith("ar"):
              cmdline = cmd + " " + args[1] + " " + args[2] + " "
              for i in range(3, len(args)):
                  rv = mySubProcess(cmdline + args[i], env)
                  if rv:
                      break
          else:
              rv = mySubProcess(cmdline, env)
  
          return rv
  
      self['SPAWN'] = mySpawn
  
  
  def split_lib(self, libname, src_list = None, env_lib = None):
      env = self
  
      num = 0
      cur_base = ""
      max_src = 64
      list = []
      lib_list = []
  
      if src_list is None:
          src_list = getattr(env, libname + "_sources")
  
      if type(env_lib) == type(None):
          env_lib = env
  
      for f in src_list:
          fname = ""
          if type(f) == type(""):
              fname = env.File(f).path
          else:
              fname = env.File(f)[0].path
          fname = fname.replace("\\", "/")
          base = string.join(fname.split("/")[:2], "/")
          if base != cur_base and len(list) > max_src:
              if num > 0:
                  lib = env_lib.add_library(libname + str(num), list)
                  lib_list.append(lib)
                  list = []
              num = num + 1
          cur_base = base
          list.append(f)
  
      lib = env_lib.add_library(libname + str(num), list)
      lib_list.append(lib)
  
      if len(lib_list) > 0:
          if os.name == 'posix' and sys.platform == 'msys':
              env.Replace(ARFLAGS=['rcsT'])
              lib = env_lib.add_library(libname + "_collated", lib_list)
              lib_list = [lib]
  
      lib_base = []
      env_lib.add_source_files(lib_base, "*.cpp")
      lib = env_lib.add_library(libname, lib_base)
      lib_list.insert(0, lib)
  
      env.Prepend(LIBS=lib_list)
  
  
  def save_active_platforms(apnames, ap):
  
      for x in ap:
          names = ['logo']
          if os.path.isfile(x + "/run_icon.png"):
              names.append('run_icon')
  
          for name in names:
              pngf = open(x + "/" + name + ".png", "rb")
              b = pngf.read(1)
              str = " /* AUTOGENERATED FILE, DO NOT EDIT */ \n"
              str += " static const unsigned char _" + x[9:] + "_" + name + "[]={"
              while len(b) == 1:
                  str += hex(ord(b))
                  b = pngf.read(1)
                  if (len(b) == 1):
                      str += ","
  
              str += "};\n"
  
              pngf.close()
  
              # NOTE: It is safe to generate this file here, since this is still executed serially
              wf = x + "/" + name + ".gen.h"
              with open(wf, "w") as pngw:
                  pngw.write(str)
  
  
  def no_verbose(sys, env):
  
      colors = {}
  
      # Colors are disabled in non-TTY environments such as pipes. This means
      # that if output is redirected to a file, it will not contain color codes
      if sys.stdout.isatty():
          colors['cyan'] = '\033[96m'
          colors['purple'] = '\033[95m'
          colors['blue'] = '\033[94m'
          colors['green'] = '\033[92m'
          colors['yellow'] = '\033[93m'
          colors['red'] = '\033[91m'
          colors['end'] = '\033[0m'
      else:
          colors['cyan'] = ''
          colors['purple'] = ''
          colors['blue'] = ''
          colors['green'] = ''
          colors['yellow'] = ''
          colors['red'] = ''
          colors['end'] = ''
  
      compile_source_message = '%sCompiling %s==> %s$SOURCE%s' % (colors['blue'], colors['purple'], colors['yellow'], colors['end'])
      java_compile_source_message = '%sCompiling %s==> %s$SOURCE%s' % (colors['blue'], colors['purple'], colors['yellow'], colors['end'])
      compile_shared_source_message = '%sCompiling shared %s==> %s$SOURCE%s' % (colors['blue'], colors['purple'], colors['yellow'], colors['end'])
      link_program_message = '%sLinking Program        %s==> %s$TARGET%s' % (colors['red'], colors['purple'], colors['yellow'], colors['end'])
      link_library_message = '%sLinking Static Library %s==> %s$TARGET%s' % (colors['red'], colors['purple'], colors['yellow'], colors['end'])
      ranlib_library_message = '%sRanlib Library         %s==> %s$TARGET%s' % (colors['red'], colors['purple'], colors['yellow'], colors['end'])
      link_shared_library_message = '%sLinking Shared Library %s==> %s$TARGET%s' % (colors['red'], colors['purple'], colors['yellow'], colors['end'])
      java_library_message = '%sCreating Java Archive  %s==> %s$TARGET%s' % (colors['red'], colors['purple'], colors['yellow'], colors['end'])
  
      env.Append(CXXCOMSTR=[compile_source_message])
      env.Append(CCCOMSTR=[compile_source_message])
      env.Append(SHCCCOMSTR=[compile_shared_source_message])
      env.Append(SHCXXCOMSTR=[compile_shared_source_message])
      env.Append(ARCOMSTR=[link_library_message])
      env.Append(RANLIBCOMSTR=[ranlib_library_message])
      env.Append(SHLINKCOMSTR=[link_shared_library_message])
      env.Append(LINKCOMSTR=[link_program_message])
      env.Append(JARCOMSTR=[java_library_message])
      env.Append(JAVACCOMSTR=[java_compile_source_message])
  
  
  def detect_visual_c_compiler_version(tools_env):
      # tools_env is the variable scons uses to call tools that execute tasks, SCons's env['ENV'] that executes tasks...
      # (see the SCons documentation for more information on what it does)...
      # in order for this function to be well encapsulated i choose to force it to receive SCons's TOOLS env (env['ENV']
      # and not scons setup environment (env)... so make sure you call the right environment on it or it will fail to detect
      # the proper vc version that will be called
  
      # There is no flag to give to visual c compilers to set the architecture, ie scons bits argument (32,64,ARM etc)
      # There are many different cl.exe files that are run, and each one compiles & links to a different architecture
      # As far as I know, the only way to figure out what compiler will be run when Scons calls cl.exe via Program()
      # is to check the PATH variable and figure out which one will be called first. Code below does that and returns:
      # the following string values:
  
      # ""              Compiler not detected
      # "amd64"         Native 64 bit compiler
      # "amd64_x86"     64 bit Cross Compiler for 32 bit
      # "x86"           Native 32 bit compiler
      # "x86_amd64"     32 bit Cross Compiler for 64 bit
  
      # There are other architectures, but Godot does not support them currently, so this function does not detect arm/amd64_arm
      # and similar architectures/compilers
  
      # Set chosen compiler to "not detected"
      vc_chosen_compiler_index = -1
      vc_chosen_compiler_str = ""
  
      # Start with Pre VS 2017 checks which uses VCINSTALLDIR:
      if 'VCINSTALLDIR' in tools_env:
          # print("Checking VCINSTALLDIR")
  
          # find() works with -1 so big ifs below are needed... the simplest solution, in fact
          # First test if amd64 and amd64_x86 compilers are present in the path
          vc_amd64_compiler_detection_index = tools_env["PATH"].find(tools_env["VCINSTALLDIR"] + "BIN\\amd64;")
          if(vc_amd64_compiler_detection_index > -1):
              vc_chosen_compiler_index = vc_amd64_compiler_detection_index
              vc_chosen_compiler_str = "amd64"
  
          vc_amd64_x86_compiler_detection_index = tools_env["PATH"].find(tools_env["VCINSTALLDIR"] + "BIN\\amd64_x86;")
          if(vc_amd64_x86_compiler_detection_index > -1
             and (vc_chosen_compiler_index == -1
                  or vc_chosen_compiler_index > vc_amd64_x86_compiler_detection_index)):
              vc_chosen_compiler_index = vc_amd64_x86_compiler_detection_index
              vc_chosen_compiler_str = "amd64_x86"
  
          # Now check the 32 bit compilers
          vc_x86_compiler_detection_index = tools_env["PATH"].find(tools_env["VCINSTALLDIR"] + "BIN;")
          if(vc_x86_compiler_detection_index > -1
             and (vc_chosen_compiler_index == -1
                  or vc_chosen_compiler_index > vc_x86_compiler_detection_index)):
              vc_chosen_compiler_index = vc_x86_compiler_detection_index
              vc_chosen_compiler_str = "x86"
  
          vc_x86_amd64_compiler_detection_index = tools_env["PATH"].find(tools_env['VCINSTALLDIR'] + "BIN\\x86_amd64;")
          if(vc_x86_amd64_compiler_detection_index > -1
             and (vc_chosen_compiler_index == -1
                  or vc_chosen_compiler_index > vc_x86_amd64_compiler_detection_index)):
              vc_chosen_compiler_index = vc_x86_amd64_compiler_detection_index
              vc_chosen_compiler_str = "x86_amd64"
  
      # and for VS 2017 and newer we check VCTOOLSINSTALLDIR:
      if 'VCTOOLSINSTALLDIR' in tools_env:
  
          # Newer versions have a different path available
          vc_amd64_compiler_detection_index = tools_env["PATH"].upper().find(tools_env['VCTOOLSINSTALLDIR'].upper() + "BIN\\HOSTX64\\X64;")
          if(vc_amd64_compiler_detection_index > -1):
              vc_chosen_compiler_index = vc_amd64_compiler_detection_index
              vc_chosen_compiler_str = "amd64"
  
          vc_amd64_x86_compiler_detection_index = tools_env["PATH"].upper().find(tools_env['VCTOOLSINSTALLDIR'].upper() + "BIN\\HOSTX64\\X86;")
          if(vc_amd64_x86_compiler_detection_index > -1
             and (vc_chosen_compiler_index == -1
                  or vc_chosen_compiler_index > vc_amd64_x86_compiler_detection_index)):
              vc_chosen_compiler_index = vc_amd64_x86_compiler_detection_index
              vc_chosen_compiler_str = "amd64_x86"
  
          vc_x86_compiler_detection_index = tools_env["PATH"].upper().find(tools_env['VCTOOLSINSTALLDIR'].upper() + "BIN\\HOSTX86\\X86;")
          if(vc_x86_compiler_detection_index > -1
             and (vc_chosen_compiler_index == -1
                  or vc_chosen_compiler_index > vc_x86_compiler_detection_index)):
              vc_chosen_compiler_index = vc_x86_compiler_detection_index
              vc_chosen_compiler_str = "x86"
  
          vc_x86_amd64_compiler_detection_index = tools_env["PATH"].upper().find(tools_env['VCTOOLSINSTALLDIR'].upper() + "BIN\\HOSTX86\\X64;")
          if(vc_x86_amd64_compiler_detection_index > -1
             and (vc_chosen_compiler_index == -1
                  or vc_chosen_compiler_index > vc_x86_amd64_compiler_detection_index)):
              vc_chosen_compiler_index = vc_x86_amd64_compiler_detection_index
              vc_chosen_compiler_str = "x86_amd64"
  
      return vc_chosen_compiler_str
  
  def find_visual_c_batch_file(env):
      from SCons.Tool.MSCommon.vc import get_default_version, get_host_target, find_batch_file
  
      version = get_default_version(env)
      (host_platform, target_platform,req_target_platform) = get_host_target(env)
      return find_batch_file(env, version, host_platform, target_platform)[0]
  
  def generate_cpp_hint_file(filename):
      if os.path.isfile(filename):
          # Don't overwrite an existing hint file since the user may have customized it.
          pass
      else:
          try:
              with open(filename, "w") as fd:
                  fd.write("#define GDCLASS(m_class, m_inherits)\n")
          except IOError:
              print("Could not write cpp.hint file.")
  
  def generate_vs_project(env, num_jobs):
      batch_file = find_visual_c_batch_file(env)
      if batch_file:
          def build_commandline(commands):
              common_build_prefix = ['cmd /V /C set "plat=$(PlatformTarget)"',
                                      '(if "$(PlatformTarget)"=="x64" (set "plat=x86_amd64"))',
                                      'set "tools=yes"',
                                      '(if "$(Configuration)"=="release" (set "tools=no"))',
                                      'call "' + batch_file + '" !plat!']
  
              result = " ^& ".join(common_build_prefix + [commands])
              return result
  
          env.AddToVSProject(env.core_sources)
          env.AddToVSProject(env.main_sources)
          env.AddToVSProject(env.modules_sources)
          env.AddToVSProject(env.scene_sources)
          env.AddToVSProject(env.servers_sources)
          env.AddToVSProject(env.editor_sources)
  
          # windows allows us to have spaces in paths, so we need
          # to double quote off the directory. However, the path ends
          # in a backslash, so we need to remove this, lest it escape the
          # last double quote off, confusing MSBuild
          env['MSVSBUILDCOM'] = build_commandline('scons --directory="$(ProjectDir.TrimEnd(\'\\\'))" platform=windows progress=no target=$(Configuration) tools=!tools! -j' + str(num_jobs))
          env['MSVSREBUILDCOM'] = build_commandline('scons --directory="$(ProjectDir.TrimEnd(\'\\\'))" platform=windows progress=no target=$(Configuration) tools=!tools! vsproj=yes -j' + str(num_jobs))
          env['MSVSCLEANCOM'] = build_commandline('scons --directory="$(ProjectDir.TrimEnd(\'\\\'))" --clean platform=windows progress=no target=$(Configuration) tools=!tools! -j' + str(num_jobs))
  
          # This version information (Win32, x64, Debug, Release, Release_Debug seems to be
          # required for Visual Studio to understand that it needs to generate an NMAKE
          # project. Do not modify without knowing what you are doing.
          debug_variants = ['debug|Win32'] + ['debug|x64']
          release_variants = ['release|Win32'] + ['release|x64']
          release_debug_variants = ['release_debug|Win32'] + ['release_debug|x64']
          variants = debug_variants + release_variants + release_debug_variants
          debug_targets = ['bin\\godot.windows.tools.32.exe'] + ['bin\\godot.windows.tools.64.exe']
          release_targets = ['bin\\godot.windows.opt.32.exe'] + ['bin\\godot.windows.opt.64.exe']
          release_debug_targets = ['bin\\godot.windows.opt.tools.32.exe'] + ['bin\\godot.windows.opt.tools.64.exe']
          targets = debug_targets + release_targets + release_debug_targets
          if not env.get('MSVS'):
              env['MSVS']['PROJECTSUFFIX'] = '.vcxproj'
              env['MSVS']['SOLUTIONSUFFIX'] = '.sln'
          env.MSVSProject(
              target=['#godot' + env['MSVSPROJECTSUFFIX']],
              incs=env.vs_incs,
              srcs=env.vs_srcs,
              runfile=targets,
              buildtarget=targets,
              auto_build_solution=1,
              variant=variants)
      else:
          print("Could not locate Visual Studio batch file for setting up the build environment. Not generating VS project.")
  
  def precious_program(env, program, sources, **args):
      program = env.ProgramOriginal(program, sources, **args)
      env.Precious(program)
      return program
  
  def add_shared_library(env, name, sources, **args):
      library = env.SharedLibrary(name, sources, **args)
      env.NoCache(library)
      return library
  
  def add_library(env, name, sources, **args):
      library = env.Library(name, sources, **args)
      env.NoCache(library)
      return library
  
  def add_program(env, name, sources, **args):
      program = env.Program(name, sources, **args)
      env.NoCache(program)
      return program
  
  def CommandNoCache(env, target, sources, command, **args):
      result = env.Command(target, sources, command, **args)
      env.NoCache(result)
      return result
  
  def detect_darwin_sdk_path(platform, env):
      sdk_name = ''
      if platform == 'osx':
          sdk_name = 'macosx'
          var_name = 'MACOS_SDK_PATH'
      elif platform == 'iphone':
          sdk_name = 'iphoneos'
          var_name = 'IPHONESDK'
      elif platform == 'iphonesimulator':
          sdk_name = 'iphonesimulator'
          var_name = 'IPHONESDK'
      else:
          raise Exception("Invalid platform argument passed to detect_darwin_sdk_path")
  
      if not env[var_name]:
          try:
              sdk_path = decode_utf8(subprocess.check_output(['xcrun', '--sdk', sdk_name, '--show-sdk-path']).strip())
              if sdk_path:
                  env[var_name] = sdk_path
          except (subprocess.CalledProcessError, OSError) as e:
              print("Failed to find SDK path while running xcrun --sdk {} --show-sdk-path.".format(sdk_name))
              raise
  
  def get_compiler_version(env):
      version = decode_utf8(subprocess.check_output([env['CXX'], '--version']).strip())
      match = re.search('[0-9][0-9.]*', version)
      if match is not None:
          return match.group().split('.')
      else:
          return None
  
  def using_gcc(env):
      return 'gcc' in os.path.basename(env["CC"])
  
  def using_clang(env):
      return 'clang' in os.path.basename(env["CC"])
  