text: """
  mbed SDK
  Copyright (c) 2011-2013 ARM Limited
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  """
  import re
  from os.path import join, basename, splitext, dirname, exists
  from distutils.spawn import find_executable
  
  from tools.toolchains import mbedToolchain, TOOLCHAIN_PATHS
  from tools.hooks import hook_tool
  
  class GCC(mbedToolchain):
      LINKER_EXT = '.ld'
      LIBRARY_EXT = '.a'
  
      STD_LIB_NAME = "lib%s.a"
      DIAGNOSTIC_PATTERN = re.compile('((?P<file>[^:]+):(?P<line>\d+):)(\d+:)? (?P<severity>warning|[eE]rror|fatal error): (?P<message>.+)')
      INDEX_PATTERN  = re.compile('(?P<col>\s*)\^')
  
      def __init__(self, target,  notify=None, macros=None,
                   silent=False, extra_verbose=False, build_profile=None,
                   build_dir=None):
          mbedToolchain.__init__(self, target, notify, macros, silent,
                                 extra_verbose=extra_verbose,
                                 build_profile=build_profile, build_dir=build_dir)
  
          tool_path=TOOLCHAIN_PATHS['GCC_ARM']
          # Add flags for current size setting
          default_lib = "std"
          if hasattr(target, "default_lib"):
              default_lib = target.default_lib
          elif hasattr(target, "default_build"): # Legacy
              default_lib = target.default_build
  
          if default_lib == "small":
              self.flags["common"].append("-DMBED_RTOS_SINGLE_THREAD")
              self.flags["ld"].append("--specs=nano.specs")
  
          if target.core == "Cortex-M0+":
              cpu = "cortex-m0plus"
          elif target.core == "Cortex-M4F":
              cpu = "cortex-m4"
          elif target.core == "Cortex-M7F":
              cpu = "cortex-m7"
          elif target.core == "Cortex-M7FD":
              cpu = "cortex-m7"
          else:
              cpu = target.core.lower()
  
          self.cpu = ["-mcpu=%s" % cpu]
          if target.core.startswith("Cortex-M"):
              self.cpu.append("-mthumb")
  
          # FPU handling, M7 possibly to have double FPU
          if target.core == "Cortex-M4F":
              self.cpu.append("-mfpu=fpv4-sp-d16")
              self.cpu.append("-mfloat-abi=softfp")
          elif target.core == "Cortex-M7F":
              self.cpu.append("-mfpu=fpv5-sp-d16")
              self.cpu.append("-mfloat-abi=softfp")
          elif target.core == "Cortex-M7FD":
              self.cpu.append("-mfpu=fpv5-d16")
              self.cpu.append("-mfloat-abi=softfp")
  
          if target.core == "Cortex-A9":
              self.cpu.append("-mthumb-interwork")
              self.cpu.append("-marm")
              self.cpu.append("-march=armv7-a")
              self.cpu.append("-mfpu=vfpv3")
              self.cpu.append("-mfloat-abi=hard")
              self.cpu.append("-mno-unaligned-access")
  
          self.flags["common"] += self.cpu
  
          main_cc = join(tool_path, "arm-none-eabi-gcc")
          main_cppc = join(tool_path, "arm-none-eabi-g++")
          self.asm = [main_cc] + self.flags['asm'] + self.flags["common"]
          self.cc  = [main_cc]
          self.cppc =[main_cppc]
          self.cc += self.flags['c'] + self.flags['common']
          self.cppc += self.flags['cxx'] + self.flags['common']
  
          self.flags['ld'] += self.cpu
          self.ld = [join(tool_path, "arm-none-eabi-gcc")] + self.flags['ld']
          self.sys_libs = ["stdc++", "supc++", "m", "c", "gcc", "nosys"]
          self.preproc = [join(tool_path, "arm-none-eabi-cpp"), "-E", "-P"]
  
          self.ar = join(tool_path, "arm-none-eabi-ar")
          self.elf2bin = join(tool_path, "arm-none-eabi-objcopy")
  
      def parse_dependencies(self, dep_path):
          dependencies = []
          buff = open(dep_path).readlines()
          buff[0] = re.sub('^(.*?)\: ', '', buff[0])
          for line in buff:
              file = line.replace('\\\n', '').strip()
              if file:
                  # GCC might list more than one dependency on a single line, in this case
                  # the dependencies are separated by a space. However, a space might also
                  # indicate an actual space character in a dependency path, but in this case
                  # the space character is prefixed by a backslash.
                  # Temporary replace all '\ ' with a special char that is not used (\a in this
                  # case) to keep them from being interpreted by 'split' (they will be converted
                  # back later to a space char)
                  file = file.replace('\\ ', '\a')
                  if file.find(" ") == -1:
                      dependencies.append((self.CHROOT if self.CHROOT else '') + file.replace('\a', ' '))
                  else:
                      dependencies = dependencies + [(self.CHROOT if self.CHROOT else '') + f.replace('\a', ' ') for f in file.split(" ")]
          return dependencies
  
      def is_not_supported_error(self, output):
          return "error: #error [NOT_SUPPORTED]" in output
  
      def parse_output(self, output):
          # The warning/error notification is multiline
          msg = None
          for line in output.splitlines():
              match = self.DIAGNOSTIC_PATTERN.search(line)
              if match is not None:
                  if msg is not None:
                      self.cc_info(msg)
                      msg = None
                  msg = {
                      'severity': match.group('severity').lower(),
                      'file': match.group('file'),
                      'line': match.group('line'),
                      'col': 0,
                      'message': match.group('message'),
                      'text': '',
                      'target_name': self.target.name,
                      'toolchain_name': self.name
                  }
              elif msg is not None:
                  # Determine the warning/error column by calculating the ^ position
                  match = self.INDEX_PATTERN.match(line)
                  if match is not None:
                      msg['col'] = len(match.group('col'))
                      self.cc_info(msg)
                      msg = None
                  else:
                      msg['text'] += line+"\n"
  
          if msg is not None:
              self.cc_info(msg)
  
      def get_dep_option(self, object):
          base, _ = splitext(object)
          dep_path = base + '.d'
          return ["-MD", "-MF", dep_path]
  
      def get_config_option(self, config_header):
          return ['-include', config_header]
  
      def get_compile_options(self, defines, includes, for_asm=False):
          opts = ['-D%s' % d for d in defines]
          if self.RESPONSE_FILES:
              opts += ['@%s' % self.get_inc_file(includes)]
          else:
              opts += ["-I%s" % i for i in includes]
  
          if not for_asm:
              config_header = self.get_config_header()
              if config_header is not None:
                  opts = opts + self.get_config_option(config_header)
          return opts
  
      @hook_tool
      def assemble(self, source, object, includes):
          # Build assemble command
          cmd = self.asm + self.get_compile_options(self.get_symbols(True), includes) + ["-o", object, source]
  
          # Call cmdline hook
          cmd = self.hook.get_cmdline_assembler(cmd)
  
          # Return command array, don't execute
          return [cmd]
  
      @hook_tool
      def compile(self, cc, source, object, includes):
          # Build compile command
          cmd = cc + self.get_compile_options(self.get_symbols(), includes)
  
          cmd.extend(self.get_dep_option(object))
  
          cmd.extend(["-o", object, source])
  
          # Call cmdline hook
          cmd = self.hook.get_cmdline_compiler(cmd)
  
          return [cmd]
  
      def compile_c(self, source, object, includes):
          return self.compile(self.cc, source, object, includes)
  
      def compile_cpp(self, source, object, includes):
          return self.compile(self.cppc, source, object, includes)
  
      @hook_tool
      def link(self, output, objects, libraries, lib_dirs, mem_map):
          libs = []
          for l in libraries:
              name, _ = splitext(basename(l))
              libs.append("-l%s" % name[3:])
          libs.extend(["-l%s" % l for l in self.sys_libs])
  
          # Preprocess
          if mem_map:
              preproc_output = join(dirname(output), ".link_script.ld")
              cmd = (self.preproc + [mem_map] + self.ld[1:] +
                     [ "-o", preproc_output])
              self.cc_verbose("Preproc: %s" % ' '.join(cmd))
              self.default_cmd(cmd)
              mem_map = preproc_output
  
          # Build linker command
          map_file = splitext(output)[0] + ".map"
          cmd = self.ld + ["-o", output, "-Wl,-Map=%s" % map_file] + objects + ["-Wl,--start-group"] + libs + ["-Wl,--end-group"]
          if mem_map:
              cmd.extend(['-T', mem_map])
  
          for L in lib_dirs:
              cmd.extend(['-L', L])
          cmd.extend(libs)
  
          # Call cmdline hook
          cmd = self.hook.get_cmdline_linker(cmd)
  
          if self.RESPONSE_FILES:
              # Split link command to linker executable + response file
              cmd_linker = cmd[0]
              link_files = self.get_link_file(cmd[1:])
              cmd = [cmd_linker, "@%s" % link_files]
  
          # Exec command
          self.cc_verbose("Link: %s" % ' '.join(cmd))
          self.default_cmd(cmd)
  
      @hook_tool
      def archive(self, objects, lib_path):
          if self.RESPONSE_FILES:
              param = ["@%s" % self.get_arch_file(objects)]
          else:
              param = objects
  
          # Exec command
          self.default_cmd([self.ar, 'rcs', lib_path] + param)
  
      @hook_tool
      def binary(self, resources, elf, bin):
          # Build binary command
          _, fmt = splitext(bin)
          bin_arg = {'.bin': 'binary', '.hex': 'ihex'}[fmt]
          cmd = [self.elf2bin, "-O", bin_arg, elf, bin]
  
          # Call cmdline hook
          cmd = self.hook.get_cmdline_binary(cmd)
  
          # Exec command
          self.cc_verbose("FromELF: %s" % ' '.join(cmd))
          self.default_cmd(cmd)
  
      @staticmethod
      def name_mangle(name):
          return "_Z%i%sv" % (len(name), name)
  
      @staticmethod
      def make_ld_define(name, value):
          return "-D%s=0x%x" % (name, value)
  
      @staticmethod
      def redirect_symbol(source, sync, build_dir):
          return "-Wl,--defsym=%s=%s" % (source, sync)
  
      @staticmethod
      def check_executable():
          """Returns True if the executable (arm-none-eabi-gcc) location
          specified by the user exists OR the executable can be found on the PATH.
          Returns False otherwise."""
          if not TOOLCHAIN_PATHS['GCC_ARM'] or not exists(TOOLCHAIN_PATHS['GCC_ARM']):
              if find_executable('arm-none-eabi-gcc'):
                  TOOLCHAIN_PATHS['GCC_ARM'] = ''
                  return True
              else:
                  return False
          else:
              exec_name = join(TOOLCHAIN_PATHS['GCC_ARM'], 'arm-none-eabi-gcc')
              return exists(exec_name) or exists(exec_name + '.exe')
  
  class GCC_ARM(GCC):
      pass
  