files: # Copyright 2014-2016 The Meson development team
  
  # 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 os
  import pickle
  import xml.dom.minidom
  import xml.etree.ElementTree as ET
  import uuid
  from pathlib import Path, PurePath
  
  from . import backends
  from .. import build
  from .. import dependencies
  from .. import mlog
  from .. import compilers
  from ..compilers import CompilerArgs
  from ..mesonlib import MesonException, File, python_command
  from ..environment import Environment, build_filename
  
  def autodetect_vs_version(build):
      vs_version = os.getenv('VisualStudioVersion', None)
      vs_install_dir = os.getenv('VSINSTALLDIR', None)
      if not vs_install_dir:
          raise MesonException('Could not detect Visual Studio: Environment variable VSINSTALLDIR is not set!\n'
                               'Are you running meson from the Visual Studio Developer Command Prompt?')
      # VisualStudioVersion is set since Visual Studio 12.0, but sometimes
      # vcvarsall.bat doesn't set it, so also use VSINSTALLDIR
      if vs_version == '14.0' or 'Visual Studio 14' in vs_install_dir:
          from mesonbuild.backend.vs2015backend import Vs2015Backend
          return Vs2015Backend(build)
      if vs_version == '15.0' or 'Visual Studio 17' in vs_install_dir or \
         'Visual Studio\\2017' in vs_install_dir:
          from mesonbuild.backend.vs2017backend import Vs2017Backend
          return Vs2017Backend(build)
      if 'Visual Studio 10.0' in vs_install_dir:
          return Vs2010Backend(build)
      raise MesonException('Could not detect Visual Studio using VisualStudioVersion: {!r} or VSINSTALLDIR: {!r}!\n'
                           'Please specify the exact backend to use.'.format(vs_version, vs_install_dir))
  
  def split_o_flags_args(args):
      """
      Splits any /O args and returns them. Does not take care of flags overriding
      previous ones. Skips non-O flag arguments.
  
      ['/Ox', '/Ob1'] returns ['/Ox', '/Ob1']
      ['/Oxj', '/MP'] returns ['/Ox', '/Oj']
      """
      o_flags = []
      for arg in args:
          if not arg.startswith('/O'):
              continue
          flags = list(arg[2:])
          # Assume that this one can't be clumped with the others since it takes
          # an argument itself
          if 'b' in flags:
              o_flags.append(arg)
          else:
              o_flags += ['/O' + f for f in flags]
      return o_flags
  
  class RegenInfo:
      def __init__(self, source_dir, build_dir, depfiles):
          self.source_dir = source_dir
          self.build_dir = build_dir
          self.depfiles = depfiles
  
  class Vs2010Backend(backends.Backend):
      def __init__(self, build):
          super().__init__(build)
          self.name = 'vs2010'
          self.project_file_version = '10.0.30319.1'
          self.platform_toolset = None
          self.vs_version = '2010'
          self.windows_target_platform_version = None
          self.subdirs = {}
  
      def generate_custom_generator_commands(self, target, parent_node):
          generator_output_files = []
          custom_target_include_dirs = []
          custom_target_output_files = []
          target_private_dir = self.relpath(self.get_target_private_dir(target), self.get_target_dir(target))
          down = self.target_to_build_root(target)
          for genlist in target.get_generated_sources():
              if isinstance(genlist, (build.CustomTarget, build.CustomTargetIndex)):
                  for i in genlist.get_outputs():
                      # Path to the generated source from the current vcxproj dir via the build root
                      ipath = os.path.join(down, self.get_target_dir(genlist), i)
                      custom_target_output_files.append(ipath)
                  idir = self.relpath(self.get_target_dir(genlist), self.get_target_dir(target))
                  if idir not in custom_target_include_dirs:
                      custom_target_include_dirs.append(idir)
              else:
                  generator = genlist.get_generator()
                  exe = generator.get_exe()
                  infilelist = genlist.get_inputs()
                  outfilelist = genlist.get_outputs()
                  source_dir = os.path.join(down, self.build_to_src, genlist.subdir)
                  exe_arr = self.exe_object_to_cmd_array(exe)
                  idgroup = ET.SubElement(parent_node, 'ItemGroup')
                  for i in range(len(infilelist)):
                      if len(infilelist) == len(outfilelist):
                          sole_output = os.path.join(target_private_dir, outfilelist[i])
                      else:
                          sole_output = ''
                      curfile = infilelist[i]
                      infilename = os.path.join(down, curfile.rel_to_builddir(self.build_to_src))
                      base_args = generator.get_arglist(infilename)
                      outfiles_rel = genlist.get_outputs_for(curfile)
                      outfiles = [os.path.join(target_private_dir, of) for of in outfiles_rel]
                      generator_output_files += outfiles
                      args = [x.replace("@INPUT@", infilename).replace('@OUTPUT@', sole_output)
                              for x in base_args]
                      args = self.replace_outputs(args, target_private_dir, outfiles_rel)
                      args = [x.replace("@SOURCE_DIR@", self.environment.get_source_dir())
                               .replace("@BUILD_DIR@", target_private_dir)
                              for x in args]
                      args = [x.replace("@CURRENT_SOURCE_DIR@", source_dir) for x in args]
                      args = [x.replace("@SOURCE_ROOT@", self.environment.get_source_dir())
                               .replace("@BUILD_ROOT@", self.environment.get_build_dir())
                              for x in args]
                      args = [x.replace('\\', '/') for x in args]
                      cmd = exe_arr + self.replace_extra_args(args, genlist)
                      if generator.capture:
                          exe_data = self.serialize_executable(
                              'generator ' + cmd[0],
                              cmd[0],
                              cmd[1:],
                              self.environment.get_build_dir(),
                              capture=outfiles[0]
                          )
                          cmd = self.environment.get_build_command() + ['--internal', 'exe', exe_data]
                          abs_pdir = os.path.join(self.environment.get_build_dir(), self.get_target_dir(target))
                          os.makedirs(abs_pdir, exist_ok=True)
                      cbs = ET.SubElement(idgroup, 'CustomBuild', Include=infilename)
                      ET.SubElement(cbs, 'Command').text = ' '.join(self.quote_arguments(cmd))
                      ET.SubElement(cbs, 'Outputs').text = ';'.join(outfiles)
          return generator_output_files, custom_target_output_files, custom_target_include_dirs
  
      def generate(self, interp):
          self.interpreter = interp
          target_machine = self.interpreter.builtin['target_machine'].cpu_family_method(None, None)
          if target_machine.endswith('64'):
              # amd64 or x86_64
              self.platform = 'x64'
          elif target_machine == 'x86':
              # x86
              self.platform = 'Win32'
          elif 'arm' in target_machine.lower():
              self.platform = 'ARM'
          else:
              raise MesonException('Unsupported Visual Studio platform: ' + target_machine)
          self.buildtype = self.environment.coredata.get_builtin_option('buildtype')
          sln_filename = os.path.join(self.environment.get_build_dir(), self.build.project_name + '.sln')
          projlist = self.generate_projects()
          self.gen_testproj('RUN_TESTS', os.path.join(self.environment.get_build_dir(), 'RUN_TESTS.vcxproj'))
          self.gen_installproj('RUN_INSTALL', os.path.join(self.environment.get_build_dir(), 'RUN_INSTALL.vcxproj'))
          self.gen_regenproj('REGEN', os.path.join(self.environment.get_build_dir(), 'REGEN.vcxproj'))
          self.generate_solution(sln_filename, projlist)
          self.generate_regen_info()
          Vs2010Backend.touch_regen_timestamp(self.environment.get_build_dir())
  
      @staticmethod
      def get_regen_stampfile(build_dir):
          return os.path.join(os.path.join(build_dir, Environment.private_dir), 'regen.stamp')
  
      @staticmethod
      def touch_regen_timestamp(build_dir):
          with open(Vs2010Backend.get_regen_stampfile(build_dir), 'w'):
              pass
  
      def generate_regen_info(self):
          deps = self.get_regen_filelist()
          regeninfo = RegenInfo(self.environment.get_source_dir(),
                                self.environment.get_build_dir(),
                                deps)
          filename = os.path.join(self.environment.get_scratch_dir(),
                                  'regeninfo.dump')
          with open(filename, 'wb') as f:
              pickle.dump(regeninfo, f)
  
      def get_vcvars_command(self):
          has_arch_values = 'VSCMD_ARG_TGT_ARCH' in os.environ and 'VSCMD_ARG_HOST_ARCH' in os.environ
  
          # Use vcvarsall.bat if we found it.
          if 'VCINSTALLDIR' in os.environ:
              vs_version = os.environ['VisualStudioVersion'] \
                  if 'VisualStudioVersion' in os.environ else None
              relative_path = 'Auxiliary\\Build\\' if vs_version == '15.0' else ''
              script_path = os.environ['VCINSTALLDIR'] + relative_path + 'vcvarsall.bat'
              if os.path.exists(script_path):
                  if has_arch_values:
                      target_arch = os.environ['VSCMD_ARG_TGT_ARCH']
                      host_arch = os.environ['VSCMD_ARG_HOST_ARCH']
                  else:
                      target_arch = os.environ.get('Platform', 'x86')
                      host_arch = target_arch
                  arch = host_arch + '_' + target_arch if host_arch != target_arch else target_arch
                  return '"%s" %s' % (script_path, arch)
  
          # Otherwise try the VS2017 Developer Command Prompt.
          if 'VS150COMNTOOLS' in os.environ and has_arch_values:
              script_path = os.environ['VS150COMNTOOLS'] + 'VsDevCmd.bat'
              if os.path.exists(script_path):
                  return '"%s" -arch=%s -host_arch=%s' % \
                      (script_path, os.environ['VSCMD_ARG_TGT_ARCH'], os.environ['VSCMD_ARG_HOST_ARCH'])
          return ''
  
      def get_obj_target_deps(self, obj_list):
          result = {}
          for o in obj_list:
              if isinstance(o, build.ExtractedObjects):
                  result[o.target.get_id()] = o.target
          return result.items()
  
      def get_target_deps(self, t, recursive=False):
          all_deps = {}
          for target in t.values():
              if isinstance(target, build.CustomTarget):
                  for d in target.get_target_dependencies():
                      all_deps[d.get_id()] = d
              elif isinstance(target, build.RunTarget):
                  for d in [target.command] + target.args:
                      if isinstance(d, (build.BuildTarget, build.CustomTarget)):
                          all_deps[d.get_id()] = d
              elif isinstance(target, build.BuildTarget):
                  for ldep in target.link_targets:
                      all_deps[ldep.get_id()] = ldep
                  for ldep in target.link_whole_targets:
                      all_deps[ldep.get_id()] = ldep
                  for obj_id, objdep in self.get_obj_target_deps(target.objects):
                      all_deps[obj_id] = objdep
                  for gendep in target.get_generated_sources():
                      if isinstance(gendep, build.CustomTarget):
                          all_deps[gendep.get_id()] = gendep
                      elif isinstance(gendep, build.CustomTargetIndex):
                          all_deps[gendep.target.get_id()] = gendep.target
                      else:
                          gen_exe = gendep.generator.get_exe()
                          if isinstance(gen_exe, build.Executable):
                              all_deps[gen_exe.get_id()] = gen_exe
              else:
                  raise MesonException('Unknown target type for target %s' % target)
          if not t or not recursive:
              return all_deps
          ret = self.get_target_deps(all_deps, recursive)
          ret.update(all_deps)
          return ret
  
      def generate_solution_dirs(self, ofile, parents):
          prj_templ = 'Project("{%s}") = "%s", "%s", "{%s}"\n'
          iterpaths = reversed(parents)
          # Skip first path
          next(iterpaths)
          for path in iterpaths:
              if path not in self.subdirs:
                  basename = path.name
                  identifier = str(uuid.uuid4()).upper()
                  # top-level directories have None as their parent_dir
                  parent_dir = path.parent
                  parent_identifier = self.subdirs[parent_dir][0] \
                      if parent_dir != PurePath('.') else None
                  self.subdirs[path] = (identifier, parent_identifier)
                  prj_line = prj_templ % (
                      self.environment.coredata.lang_guids['directory'],
                      basename, basename, self.subdirs[path][0])
                  ofile.write(prj_line)
                  ofile.write('EndProject\n')
  
      def generate_solution(self, sln_filename, projlist):
          default_projlist = self.get_build_by_default_targets()
          with open(sln_filename, 'w', encoding='utf-8') as ofile:
              ofile.write('Microsoft Visual Studio Solution File, Format '
                          'Version 11.00\n')
              ofile.write('# Visual Studio ' + self.vs_version + '\n')
              prj_templ = 'Project("{%s}") = "%s", "%s", "{%s}"\n'
              for prj in projlist:
                  coredata = self.environment.coredata
                  if coredata.get_builtin_option('layout') == 'mirror':
                      self.generate_solution_dirs(ofile, prj[1].parents)
                  target = self.build.targets[prj[0]]
                  lang = 'default'
                  if hasattr(target, 'compilers') and target.compilers:
                      for (lang_out, _) in target.compilers.items():
                          lang = lang_out
                          break
                  prj_line = prj_templ % (
                      self.environment.coredata.lang_guids[lang],
                      prj[0], prj[1], prj[2])
                  ofile.write(prj_line)
                  target_dict = {target.get_id(): target}
                  # Get direct deps
                  all_deps = self.get_target_deps(target_dict)
                  # Get recursive deps
                  recursive_deps = self.get_target_deps(
                      target_dict, recursive=True)
                  ofile.write('\tProjectSection(ProjectDependencies) = '
                              'postProject\n')
                  regen_guid = self.environment.coredata.regen_guid
                  ofile.write('\t\t{%s} = {%s}\n' % (regen_guid, regen_guid))
                  for dep in all_deps.keys():
                      guid = self.environment.coredata.target_guids[dep]
                      ofile.write('\t\t{%s} = {%s}\n' % (guid, guid))
                  ofile.write('\tEndProjectSection\n')
                  ofile.write('EndProject\n')
                  for dep, target in recursive_deps.items():
                      if prj[0] in default_projlist:
                          default_projlist[dep] = target
  
              test_line = prj_templ % (self.environment.coredata.lang_guids['default'],
                                       'RUN_TESTS', 'RUN_TESTS.vcxproj',
                                       self.environment.coredata.test_guid)
              ofile.write(test_line)
              ofile.write('EndProject\n')
              regen_line = prj_templ % (self.environment.coredata.lang_guids['default'],
                                        'REGEN', 'REGEN.vcxproj',
                                        self.environment.coredata.regen_guid)
              ofile.write(regen_line)
              ofile.write('EndProject\n')
              install_line = prj_templ % (self.environment.coredata.lang_guids['default'],
                                          'RUN_INSTALL', 'RUN_INSTALL.vcxproj',
                                          self.environment.coredata.install_guid)
              ofile.write(install_line)
              ofile.write('EndProject\n')
              ofile.write('Global\n')
              ofile.write('\tGlobalSection(SolutionConfigurationPlatforms) = '
                          'preSolution\n')
              ofile.write('\t\t%s|%s = %s|%s\n' %
                          (self.buildtype, self.platform, self.buildtype,
                           self.platform))
              ofile.write('\tEndGlobalSection\n')
              ofile.write('\tGlobalSection(ProjectConfigurationPlatforms) = '
                          'postSolution\n')
              ofile.write('\t\t{%s}.%s|%s.ActiveCfg = %s|%s\n' %
                          (self.environment.coredata.regen_guid, self.buildtype,
                           self.platform, self.buildtype, self.platform))
              ofile.write('\t\t{%s}.%s|%s.Build.0 = %s|%s\n' %
                          (self.environment.coredata.regen_guid, self.buildtype,
                           self.platform, self.buildtype, self.platform))
              # Create the solution configuration
              for p in projlist:
                  # Add to the list of projects in this solution
                  ofile.write('\t\t{%s}.%s|%s.ActiveCfg = %s|%s\n' %
                              (p[2], self.buildtype, self.platform,
                               self.buildtype, self.platform))
                  if p[0] in default_projlist and \
                     not isinstance(self.build.targets[p[0]], build.RunTarget):
                      # Add to the list of projects to be built
                      ofile.write('\t\t{%s}.%s|%s.Build.0 = %s|%s\n' %
                                  (p[2], self.buildtype, self.platform,
                                   self.buildtype, self.platform))
              ofile.write('\t\t{%s}.%s|%s.ActiveCfg = %s|%s\n' %
                          (self.environment.coredata.test_guid, self.buildtype,
                           self.platform, self.buildtype, self.platform))
              ofile.write('\t\t{%s}.%s|%s.ActiveCfg = %s|%s\n' %
                          (self.environment.coredata.install_guid, self.buildtype,
                           self.platform, self.buildtype, self.platform))
              ofile.write('\tEndGlobalSection\n')
              ofile.write('\tGlobalSection(SolutionProperties) = preSolution\n')
              ofile.write('\t\tHideSolutionNode = FALSE\n')
              ofile.write('\tEndGlobalSection\n')
              if self.subdirs:
                  ofile.write('\tGlobalSection(NestedProjects) = '
                              'preSolution\n')
                  for p in projlist:
                      if p[1].parent != PurePath('.'):
                          ofile.write("\t\t{%s} = {%s}\n" % (p[2], self.subdirs[p[1].parent][0]))
                  for (_, subdir) in self.subdirs.items():
                      if subdir[1]:
                          ofile.write("\t\t{%s} = {%s}\n" % (subdir[0], subdir[1]))
                  ofile.write('\tEndGlobalSection\n')
              ofile.write('EndGlobal\n')
  
      def generate_projects(self):
          startup_project = self.environment.coredata.backend_options['backend_startup_project'].value
          projlist = []
          startup_idx = 0
          for (i, (name, target)) in enumerate(self.build.targets.items()):
              if startup_project and startup_project == target.get_basename():
                  startup_idx = i
              outdir = Path(
                  self.environment.get_build_dir(),
                  self.get_target_dir(target)
              )
              outdir.mkdir(exist_ok=True, parents=True)
              fname = name + '.vcxproj'
              target_dir = PurePath(self.get_target_dir(target))
              relname = target_dir / fname
              projfile_path = outdir / fname
              proj_uuid = self.environment.coredata.target_guids[name]
              self.gen_vcxproj(target, str(projfile_path), proj_uuid)
              projlist.append((name, relname, proj_uuid))
  
          # Put the startup project first in the project list
          if startup_idx:
              projlist = [projlist[startup_idx]] + projlist[0:startup_idx] + projlist[startup_idx + 1:-1]
  
          return projlist
  
      def split_sources(self, srclist):
          sources = []
          headers = []
          objects = []
          languages = []
          for i in srclist:
              if self.environment.is_header(i):
                  headers.append(i)
              elif self.environment.is_object(i):
                  objects.append(i)
              elif self.environment.is_source(i):
                  sources.append(i)
                  lang = self.lang_from_source_file(i)
                  if lang not in languages:
                      languages.append(lang)
              elif self.environment.is_library(i):
                  pass
              else:
                  # Everything that is not an object or source file is considered a header.
                  headers.append(i)
          return sources, headers, objects, languages
  
      def target_to_build_root(self, target):
          if self.get_target_dir(target) == '':
              return ''
  
          directories = os.path.normpath(self.get_target_dir(target)).split(os.sep)
          return os.sep.join(['..'] * len(directories))
  
      def quote_arguments(self, arr):
          return ['"%s"' % i for i in arr]
  
      def add_project_reference(self, root, include, projid):
          ig = ET.SubElement(root, 'ItemGroup')
          pref = ET.SubElement(ig, 'ProjectReference', Include=include)
          ET.SubElement(pref, 'Project').text = '{%s}' % projid
  
      def create_basic_crap(self, target, guid):
          project_name = target.name
          root = ET.Element('Project', {'DefaultTargets': "Build",
                                        'ToolsVersion': '4.0',
                                        'xmlns': 'http://schemas.microsoft.com/developer/msbuild/2003'})
          confitems = ET.SubElement(root, 'ItemGroup', {'Label': 'ProjectConfigurations'})
          prjconf = ET.SubElement(confitems, 'ProjectConfiguration',
                                  {'Include': self.buildtype + '|' + self.platform})
          p = ET.SubElement(prjconf, 'Configuration')
          p.text = self.buildtype
          pl = ET.SubElement(prjconf, 'Platform')
          pl.text = self.platform
          globalgroup = ET.SubElement(root, 'PropertyGroup', Label='Globals')
          guidelem = ET.SubElement(globalgroup, 'ProjectGuid')
          guidelem.text = '{%s}' % guid
          kw = ET.SubElement(globalgroup, 'Keyword')
          kw.text = self.platform + 'Proj'
          p = ET.SubElement(globalgroup, 'Platform')
          p.text = self.platform
          pname = ET.SubElement(globalgroup, 'ProjectName')
          pname.text = project_name
          if self.windows_target_platform_version:
              ET.SubElement(globalgroup, 'WindowsTargetPlatformVersion').text = self.windows_target_platform_version
          ET.SubElement(root, 'Import', Project='$(VCTargetsPath)\Microsoft.Cpp.Default.props')
          type_config = ET.SubElement(root, 'PropertyGroup', Label='Configuration')
          ET.SubElement(type_config, 'ConfigurationType')
          ET.SubElement(type_config, 'CharacterSet').text = 'MultiByte'
          ET.SubElement(type_config, 'UseOfMfc').text = 'false'
          if self.platform_toolset:
              ET.SubElement(type_config, 'PlatformToolset').text = self.platform_toolset
          ET.SubElement(root, 'Import', Project='$(VCTargetsPath)\Microsoft.Cpp.props')
          direlem = ET.SubElement(root, 'PropertyGroup')
          fver = ET.SubElement(direlem, '_ProjectFileVersion')
          fver.text = self.project_file_version
          outdir = ET.SubElement(direlem, 'OutDir')
          outdir.text = '.\\'
          intdir = ET.SubElement(direlem, 'IntDir')
          intdir.text = target.get_id() + '\\'
          tname = ET.SubElement(direlem, 'TargetName')
          tname.text = target.name
          return root
  
      def gen_run_target_vcxproj(self, target, ofname, guid):
          root = self.create_basic_crap(target, guid)
          action = ET.SubElement(root, 'ItemDefinitionGroup')
          customstep = ET.SubElement(action, 'PostBuildEvent')
          cmd_raw = [target.command] + target.args
          cmd = python_command + \
              [os.path.join(self.environment.get_script_dir(), 'commandrunner.py'),
               self.environment.get_build_dir(),
               self.environment.get_source_dir(),
               self.get_target_dir(target)] + self.environment.get_build_command()
          for i in cmd_raw:
              if isinstance(i, build.BuildTarget):
                  cmd.append(os.path.join(self.environment.get_build_dir(), self.get_target_filename(i)))
              elif isinstance(i, dependencies.ExternalProgram):
                  cmd += i.get_command()
              elif isinstance(i, File):
                  relfname = i.rel_to_builddir(self.build_to_src)
                  cmd.append(os.path.join(self.environment.get_build_dir(), relfname))
              else:
                  cmd.append(i)
          cmd_templ = '''"%s" ''' * len(cmd)
          ET.SubElement(customstep, 'Command').text = cmd_templ % tuple(cmd)
          ET.SubElement(customstep, 'Message').text = 'Running custom command.'
          ET.SubElement(root, 'Import', Project='$(VCTargetsPath)\Microsoft.Cpp.targets')
          self._prettyprint_vcxproj_xml(ET.ElementTree(root), ofname)
  
      def gen_custom_target_vcxproj(self, target, ofname, guid):
          root = self.create_basic_crap(target, guid)
          action = ET.SubElement(root, 'ItemDefinitionGroup')
          customstep = ET.SubElement(action, 'CustomBuildStep')
          # We need to always use absolute paths because our invocation is always
          # from the target dir, not the build root.
          target.absolute_paths = True
          (srcs, ofilenames, cmd) = self.eval_custom_target_command(target, True)
          depend_files = self.get_custom_target_depend_files(target, True)
          # Always use a wrapper because MSBuild eats random characters when
          # there are many arguments.
          tdir_abs = os.path.join(self.environment.get_build_dir(), self.get_target_dir(target))
          extra_bdeps = target.get_transitive_build_target_deps()
          extra_paths = self.determine_windows_extra_paths(target.command[0], extra_bdeps)
          exe_data = self.serialize_executable(target.name, target.command[0], cmd[1:],
                                               # All targets run from the target dir
                                               tdir_abs,
                                               extra_paths=extra_paths,
                                               capture=ofilenames[0] if target.capture else None)
          wrapper_cmd = self.environment.get_build_command() + ['--internal', 'exe', exe_data]
          ET.SubElement(customstep, 'Command').text = ' '.join(self.quote_arguments(wrapper_cmd))
          ET.SubElement(customstep, 'Outputs').text = ';'.join(ofilenames)
          ET.SubElement(customstep, 'Inputs').text = ';'.join([exe_data] + srcs + depend_files)
          ET.SubElement(root, 'Import', Project='$(VCTargetsPath)\Microsoft.Cpp.targets')
          self.generate_custom_generator_commands(target, root)
          self._prettyprint_vcxproj_xml(ET.ElementTree(root), ofname)
  
      @classmethod
      def lang_from_source_file(cls, src):
          ext = src.split('.')[-1]
          if ext in compilers.c_suffixes:
              return 'c'
          if ext in compilers.cpp_suffixes:
              return 'cpp'
          raise MesonException('Could not guess language from source file %s.' % src)
  
      def add_pch(self, inc_cl, proj_to_src_dir, pch_sources, source_file):
          if len(pch_sources) <= 1:
              # We only need per file precompiled headers if we have more than 1 language.
              return
          lang = Vs2010Backend.lang_from_source_file(source_file)
          header = os.path.join(proj_to_src_dir, pch_sources[lang][0])
          pch_file = ET.SubElement(inc_cl, 'PrecompiledHeaderFile')
          pch_file.text = header
          pch_include = ET.SubElement(inc_cl, 'ForcedIncludeFiles')
          pch_include.text = header + ';%(ForcedIncludeFiles)'
          pch_out = ET.SubElement(inc_cl, 'PrecompiledHeaderOutputFile')
          pch_out.text = '$(IntDir)$(TargetName)-%s.pch' % lang
  
      def is_argument_with_msbuild_xml_entry(self, entry):
          # Remove arguments that have a top level XML entry so
          # they are not used twice.
          # FIXME add args as needed.
          return entry[1:].startswith('M')
  
      def add_additional_options(self, lang, parent_node, file_args):
          args = []
          for arg in file_args[lang].to_native():
              if self.is_argument_with_msbuild_xml_entry(arg):
                  continue
              if arg == '%(AdditionalOptions)':
                  args.append(arg)
              else:
                  args.append(self.escape_additional_option(arg))
          ET.SubElement(parent_node, "AdditionalOptions").text = ' '.join(args)
  
      def add_preprocessor_defines(self, lang, parent_node, file_defines):
          defines = []
          for define in file_defines[lang]:
              if define == '%(PreprocessorDefinitions)':
                  defines.append(define)
              else:
                  defines.append(self.escape_preprocessor_define(define))
          ET.SubElement(parent_node, "PreprocessorDefinitions").text = ';'.join(defines)
  
      def add_include_dirs(self, lang, parent_node, file_inc_dirs):
          dirs = file_inc_dirs[lang]
          ET.SubElement(parent_node, "AdditionalIncludeDirectories").text = ';'.join(dirs)
  
      @staticmethod
      def has_objects(objects, additional_objects, generated_objects):
          # Ignore generated objects, those are automatically used by MSBuild because they are part of
          # the CustomBuild Outputs.
          return len(objects) + len(additional_objects) > 0
  
      @staticmethod
      def add_generated_objects(node, generated_objects):
          # Do not add generated objects to project file. Those are automatically used by MSBuild, because
          # they are part of the CustomBuild Outputs.
          return
  
      @staticmethod
      def escape_preprocessor_define(define):
          # See: https://msdn.microsoft.com/en-us/library/bb383819.aspx
          table = str.maketrans({'%': '%25', '$': '%24', '@': '%40',
                                 "'": '%27', ';': '%3B', '?': '%3F', '*': '%2A',
                                 # We need to escape backslash because it'll be un-escaped by
                                 # Windows during process creation when it parses the arguments
                                 # Basically, this converts `\` to `\\`.
                                 '\\': '\\\\'})
          return define.translate(table)
  
      @staticmethod
      def escape_additional_option(option):
          # See: https://msdn.microsoft.com/en-us/library/bb383819.aspx
          table = str.maketrans({'%': '%25', '$': '%24', '@': '%40',
                                 "'": '%27', ';': '%3B', '?': '%3F', '*': '%2A', ' ': '%20'})
          option = option.translate(table)
          # Since we're surrounding the option with ", if it ends in \ that will
          # escape the " when the process arguments are parsed and the starting
          # " will not terminate. So we escape it if that's the case.  I'm not
          # kidding, this is how escaping works for process args on Windows.
          if option.endswith('\\'):
              option += '\\'
          return '"{}"'.format(option)
  
      @staticmethod
      def split_link_args(args):
          """
          Split a list of link arguments into three lists:
          * library search paths
          * library filenames (or paths)
          * other link arguments
          """
          lpaths = []
          libs = []
          other = []
          for arg in args:
              if arg.startswith('/LIBPATH:'):
                  lpath = arg[9:]
                  # De-dup library search paths by removing older entries when
                  # a new one is found. This is necessary because unlike other
                  # search paths such as the include path, the library is
                  # searched for in the newest (right-most) search path first.
                  if lpath in lpaths:
                      lpaths.remove(lpath)
                  lpaths.append(lpath)
              elif arg.startswith(('/', '-')):
                  other.append(arg)
              # It's ok if we miss libraries with non-standard extensions here.
              # They will go into the general link arguments.
              elif arg.endswith('.lib') or arg.endswith('.a'):
                  # De-dup
                  if arg not in libs:
                      libs.append(arg)
              else:
                  other.append(arg)
          return lpaths, libs, other
  
      def _get_cl_compiler(self, target):
          for lang, c in target.compilers.items():
              if lang in ('c', 'cpp'):
                  return c
          # No source files, only objects, but we still need a compiler, so
          # return a found compiler
          if len(target.objects) > 0:
              for lang, c in self.environment.coredata.compilers.items():
                  if lang in ('c', 'cpp'):
                      return c
          raise MesonException('Could not find a C or C++ compiler. MSVC can only build C/C++ projects.')
  
      def _prettyprint_vcxproj_xml(self, tree, ofname):
          tree.write(ofname, encoding='utf-8', xml_declaration=True)
          # ElementTree can not do
  
  [... the rest is omitted ...]
files: mesonbuild/backend/vs2010backend.py
files: # Copyright 2014-2016 The Meson development team
  
  # 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 os
  import pickle
  import xml.dom.minidom
  import xml.etree.ElementTree as ET
  import uuid
  from pathlib import Path, PurePath
  
  from . import backends
  from .. import build
  from .. import dependencies
  from .. import mlog
  from .. import compilers
  from ..compilers import CompilerArgs
  from ..mesonlib import MesonException, File, python_command
  from ..environment import Environment, build_filename
  
  def autodetect_vs_version(build):
      vs_version = os.getenv('VisualStudioVersion', None)
      vs_install_dir = os.getenv('VSINSTALLDIR', None)
      if not vs_install_dir:
          raise MesonException('Could not detect Visual Studio: Environment variable VSINSTALLDIR is not set!\n'
                               'Are you running meson from the Visual Studio Developer Command Prompt?')
      # VisualStudioVersion is set since Visual Studio 12.0, but sometimes
      # vcvarsall.bat doesn't set it, so also use VSINSTALLDIR
      if vs_version == '14.0' or 'Visual Studio 14' in vs_install_dir:
          from mesonbuild.backend.vs2015backend import Vs2015Backend
          return Vs2015Backend(build)
      if vs_version == '15.0' or 'Visual Studio 17' in vs_install_dir or \
         'Visual Studio\\2017' in vs_install_dir:
          from mesonbuild.backend.vs2017backend import Vs2017Backend
          return Vs2017Backend(build)
      if 'Visual Studio 10.0' in vs_install_dir:
          return Vs2010Backend(build)
      raise MesonException('Could not detect Visual Studio using VisualStudioVersion: {!r} or VSINSTALLDIR: {!r}!\n'
                           'Please specify the exact backend to use.'.format(vs_version, vs_install_dir))
  
  def split_o_flags_args(args):
      """
      Splits any /O args and returns them. Does not take care of flags overriding
      previous ones. Skips non-O flag arguments.
  
      ['/Ox', '/Ob1'] returns ['/Ox', '/Ob1']
      ['/Oxj', '/MP'] returns ['/Ox', '/Oj']
      """
      o_flags = []
      for arg in args:
          if not arg.startswith('/O'):
              continue
          flags = list(arg[2:])
          # Assume that this one can't be clumped with the others since it takes
          # an argument itself
          if 'b' in flags:
              o_flags.append(arg)
          else:
              o_flags += ['/O' + f for f in flags]
      return o_flags
  
  class RegenInfo:
      def __init__(self, source_dir, build_dir, depfiles):
          self.source_dir = source_dir
          self.build_dir = build_dir
          self.depfiles = depfiles
  
  class Vs2010Backend(backends.Backend):
      def __init__(self, build):
          super().__init__(build)
          self.name = 'vs2010'
          self.project_file_version = '10.0.30319.1'
          self.platform_toolset = None
          self.vs_version = '2010'
          self.windows_target_platform_version = None
          self.subdirs = {}
  
      def generate_custom_generator_commands(self, target, parent_node):
          generator_output_files = []
          custom_target_include_dirs = []
          custom_target_output_files = []
          target_private_dir = self.relpath(self.get_target_private_dir(target), self.get_target_dir(target))
          down = self.target_to_build_root(target)
          for genlist in target.get_generated_sources():
              if isinstance(genlist, (build.CustomTarget, build.CustomTargetIndex)):
                  for i in genlist.get_outputs():
                      # Path to the generated source from the current vcxproj dir via the build root
                      ipath = os.path.join(down, self.get_target_dir(genlist), i)
                      custom_target_output_files.append(ipath)
                  idir = self.relpath(self.get_target_dir(genlist), self.get_target_dir(target))
                  if idir not in custom_target_include_dirs:
                      custom_target_include_dirs.append(idir)
              else:
                  generator = genlist.get_generator()
                  exe = generator.get_exe()
                  infilelist = genlist.get_inputs()
                  outfilelist = genlist.get_outputs()
                  source_dir = os.path.join(down, self.build_to_src, genlist.subdir)
                  exe_arr = self.exe_object_to_cmd_array(exe)
                  idgroup = ET.SubElement(parent_node, 'ItemGroup')
                  for i in range(len(infilelist)):
                      if len(infilelist) == len(outfilelist):
                          sole_output = os.path.join(target_private_dir, outfilelist[i])
                      else:
                          sole_output = ''
                      curfile = infilelist[i]
                      infilename = os.path.join(down, curfile.rel_to_builddir(self.build_to_src))
                      base_args = generator.get_arglist(infilename)
                      outfiles_rel = genlist.get_outputs_for(curfile)
                      outfiles = [os.path.join(target_private_dir, of) for of in outfiles_rel]
                      generator_output_files += outfiles
                      args = [x.replace("@INPUT@", infilename).replace('@OUTPUT@', sole_output)
                              for x in base_args]
                      args = self.replace_outputs(args, target_private_dir, outfiles_rel)
                      args = [x.replace("@SOURCE_DIR@", self.environment.get_source_dir())
                               .replace("@BUILD_DIR@", target_private_dir)
                              for x in args]
                      args = [x.replace("@CURRENT_SOURCE_DIR@", source_dir) for x in args]
                      args = [x.replace("@SOURCE_ROOT@", self.environment.get_source_dir())
                               .replace("@BUILD_ROOT@", self.environment.get_build_dir())
                              for x in args]
                      args = [x.replace('\\', '/') for x in args]
                      cmd = exe_arr + self.replace_extra_args(args, genlist)
                      if generator.capture:
                          exe_data = self.serialize_executable(
                              'generator ' + cmd[0],
                              cmd[0],
                              cmd[1:],
                              self.environment.get_build_dir(),
                              capture=outfiles[0]
                          )
                          cmd = self.environment.get_build_command() + ['--internal', 'exe', exe_data]
                          abs_pdir = os.path.join(self.environment.get_build_dir(), self.get_target_dir(target))
                          os.makedirs(abs_pdir, exist_ok=True)
                      cbs = ET.SubElement(idgroup, 'CustomBuild', Include=infilename)
                      ET.SubElement(cbs, 'Command').text = ' '.join(self.quote_arguments(cmd))
                      ET.SubElement(cbs, 'Outputs').text = ';'.join(outfiles)
          return generator_output_files, custom_target_output_files, custom_target_include_dirs
  
      def generate(self, interp):
          self.interpreter = interp
          target_machine = self.interpreter.builtin['target_machine'].cpu_family_method(None, None)
          if target_machine.endswith('64'):
              # amd64 or x86_64
              self.platform = 'x64'
          elif target_machine == 'x86':
              # x86
              self.platform = 'Win32'
          elif 'arm' in target_machine.lower():
              self.platform = 'ARM'
          else:
              raise MesonException('Unsupported Visual Studio platform: ' + target_machine)
          self.buildtype = self.environment.coredata.get_builtin_option('buildtype')
          sln_filename = os.path.join(self.environment.get_build_dir(), self.build.project_name + '.sln')
          projlist = self.generate_projects()
          self.gen_testproj('RUN_TESTS', os.path.join(self.environment.get_build_dir(), 'RUN_TESTS.vcxproj'))
          self.gen_installproj('RUN_INSTALL', os.path.join(self.environment.get_build_dir(), 'RUN_INSTALL.vcxproj'))
          self.gen_regenproj('REGEN', os.path.join(self.environment.get_build_dir(), 'REGEN.vcxproj'))
          self.generate_solution(sln_filename, projlist)
          self.generate_regen_info()
          Vs2010Backend.touch_regen_timestamp(self.environment.get_build_dir())
  
      @staticmethod
      def get_regen_stampfile(build_dir):
          return os.path.join(os.path.join(build_dir, Environment.private_dir), 'regen.stamp')
  
      @staticmethod
      def touch_regen_timestamp(build_dir):
          with open(Vs2010Backend.get_regen_stampfile(build_dir), 'w'):
              pass
  
      def generate_regen_info(self):
          deps = self.get_regen_filelist()
          regeninfo = RegenInfo(self.environment.get_source_dir(),
                                self.environment.get_build_dir(),
                                deps)
          filename = os.path.join(self.environment.get_scratch_dir(),
                                  'regeninfo.dump')
          with open(filename, 'wb') as f:
              pickle.dump(regeninfo, f)
  
      def get_obj_target_deps(self, obj_list):
          result = {}
          for o in obj_list:
              if isinstance(o, build.ExtractedObjects):
                  result[o.target.get_id()] = o.target
          return result.items()
  
      def get_target_deps(self, t, recursive=False):
          all_deps = {}
          for target in t.values():
              if isinstance(target, build.CustomTarget):
                  for d in target.get_target_dependencies():
                      all_deps[d.get_id()] = d
              elif isinstance(target, build.RunTarget):
                  for d in [target.command] + target.args:
                      if isinstance(d, (build.BuildTarget, build.CustomTarget)):
                          all_deps[d.get_id()] = d
              elif isinstance(target, build.BuildTarget):
                  for ldep in target.link_targets:
                      all_deps[ldep.get_id()] = ldep
                  for ldep in target.link_whole_targets:
                      all_deps[ldep.get_id()] = ldep
                  for obj_id, objdep in self.get_obj_target_deps(target.objects):
                      all_deps[obj_id] = objdep
                  for gendep in target.get_generated_sources():
                      if isinstance(gendep, build.CustomTarget):
                          all_deps[gendep.get_id()] = gendep
                      elif isinstance(gendep, build.CustomTargetIndex):
                          all_deps[gendep.target.get_id()] = gendep.target
                      else:
                          gen_exe = gendep.generator.get_exe()
                          if isinstance(gen_exe, build.Executable):
                              all_deps[gen_exe.get_id()] = gen_exe
              else:
                  raise MesonException('Unknown target type for target %s' % target)
          if not t or not recursive:
              return all_deps
          ret = self.get_target_deps(all_deps, recursive)
          ret.update(all_deps)
          return ret
  
      def generate_solution_dirs(self, ofile, parents):
          prj_templ = 'Project("{%s}") = "%s", "%s", "{%s}"\n'
          iterpaths = reversed(parents)
          # Skip first path
          next(iterpaths)
          for path in iterpaths:
              if path not in self.subdirs:
                  basename = path.name
                  identifier = str(uuid.uuid4()).upper()
                  # top-level directories have None as their parent_dir
                  parent_dir = path.parent
                  parent_identifier = self.subdirs[parent_dir][0] \
                      if parent_dir != PurePath('.') else None
                  self.subdirs[path] = (identifier, parent_identifier)
                  prj_line = prj_templ % (
                      self.environment.coredata.lang_guids['directory'],
                      basename, basename, self.subdirs[path][0])
                  ofile.write(prj_line)
                  ofile.write('EndProject\n')
  
      def generate_solution(self, sln_filename, projlist):
          default_projlist = self.get_build_by_default_targets()
          with open(sln_filename, 'w', encoding='utf-8') as ofile:
              ofile.write('Microsoft Visual Studio Solution File, Format '
                          'Version 11.00\n')
              ofile.write('# Visual Studio ' + self.vs_version + '\n')
              prj_templ = 'Project("{%s}") = "%s", "%s", "{%s}"\n'
              for prj in projlist:
                  coredata = self.environment.coredata
                  if coredata.get_builtin_option('layout') == 'mirror':
                      self.generate_solution_dirs(ofile, prj[1].parents)
                  target = self.build.targets[prj[0]]
                  lang = 'default'
                  if hasattr(target, 'compilers') and target.compilers:
                      for (lang_out, _) in target.compilers.items():
                          lang = lang_out
                          break
                  prj_line = prj_templ % (
                      self.environment.coredata.lang_guids[lang],
                      prj[0], prj[1], prj[2])
                  ofile.write(prj_line)
                  target_dict = {target.get_id(): target}
                  # Get direct deps
                  all_deps = self.get_target_deps(target_dict)
                  # Get recursive deps
                  recursive_deps = self.get_target_deps(
                      target_dict, recursive=True)
                  ofile.write('\tProjectSection(ProjectDependencies) = '
                              'postProject\n')
                  regen_guid = self.environment.coredata.regen_guid
                  ofile.write('\t\t{%s} = {%s}\n' % (regen_guid, regen_guid))
                  for dep in all_deps.keys():
                      guid = self.environment.coredata.target_guids[dep]
                      ofile.write('\t\t{%s} = {%s}\n' % (guid, guid))
                  ofile.write('\tEndProjectSection\n')
                  ofile.write('EndProject\n')
                  for dep, target in recursive_deps.items():
                      if prj[0] in default_projlist:
                          default_projlist[dep] = target
  
              test_line = prj_templ % (self.environment.coredata.lang_guids['default'],
                                       'RUN_TESTS', 'RUN_TESTS.vcxproj',
                                       self.environment.coredata.test_guid)
              ofile.write(test_line)
              ofile.write('EndProject\n')
              regen_line = prj_templ % (self.environment.coredata.lang_guids['default'],
                                        'REGEN', 'REGEN.vcxproj',
                                        self.environment.coredata.regen_guid)
              ofile.write(regen_line)
              ofile.write('EndProject\n')
              install_line = prj_templ % (self.environment.coredata.lang_guids['default'],
                                          'RUN_INSTALL', 'RUN_INSTALL.vcxproj',
                                          self.environment.coredata.install_guid)
              ofile.write(install_line)
              ofile.write('EndProject\n')
              ofile.write('Global\n')
              ofile.write('\tGlobalSection(SolutionConfigurationPlatforms) = '
                          'preSolution\n')
              ofile.write('\t\t%s|%s = %s|%s\n' %
                          (self.buildtype, self.platform, self.buildtype,
                           self.platform))
              ofile.write('\tEndGlobalSection\n')
              ofile.write('\tGlobalSection(ProjectConfigurationPlatforms) = '
                          'postSolution\n')
              ofile.write('\t\t{%s}.%s|%s.ActiveCfg = %s|%s\n' %
                          (self.environment.coredata.regen_guid, self.buildtype,
                           self.platform, self.buildtype, self.platform))
              ofile.write('\t\t{%s}.%s|%s.Build.0 = %s|%s\n' %
                          (self.environment.coredata.regen_guid, self.buildtype,
                           self.platform, self.buildtype, self.platform))
              # Create the solution configuration
              for p in projlist:
                  # Add to the list of projects in this solution
                  ofile.write('\t\t{%s}.%s|%s.ActiveCfg = %s|%s\n' %
                              (p[2], self.buildtype, self.platform,
                               self.buildtype, self.platform))
                  if p[0] in default_projlist and \
                     not isinstance(self.build.targets[p[0]], build.RunTarget):
                      # Add to the list of projects to be built
                      ofile.write('\t\t{%s}.%s|%s.Build.0 = %s|%s\n' %
                                  (p[2], self.buildtype, self.platform,
                                   self.buildtype, self.platform))
              ofile.write('\t\t{%s}.%s|%s.ActiveCfg = %s|%s\n' %
                          (self.environment.coredata.test_guid, self.buildtype,
                           self.platform, self.buildtype, self.platform))
              ofile.write('\t\t{%s}.%s|%s.ActiveCfg = %s|%s\n' %
                          (self.environment.coredata.install_guid, self.buildtype,
                           self.platform, self.buildtype, self.platform))
              ofile.write('\tEndGlobalSection\n')
              ofile.write('\tGlobalSection(SolutionProperties) = preSolution\n')
              ofile.write('\t\tHideSolutionNode = FALSE\n')
              ofile.write('\tEndGlobalSection\n')
              if self.subdirs:
                  ofile.write('\tGlobalSection(NestedProjects) = '
                              'preSolution\n')
                  for p in projlist:
                      if p[1].parent != PurePath('.'):
                          ofile.write("\t\t{%s} = {%s}\n" % (p[2], self.subdirs[p[1].parent][0]))
                  for (_, subdir) in self.subdirs.items():
                      if subdir[1]:
                          ofile.write("\t\t{%s} = {%s}\n" % (subdir[0], subdir[1]))
                  ofile.write('\tEndGlobalSection\n')
              ofile.write('EndGlobal\n')
  
      def generate_projects(self):
          startup_project = self.environment.coredata.backend_options['backend_startup_project'].value
          projlist = []
          startup_idx = 0
          for (i, (name, target)) in enumerate(self.build.targets.items()):
              if startup_project and startup_project == target.get_basename():
                  startup_idx = i
              outdir = Path(
                  self.environment.get_build_dir(),
                  self.get_target_dir(target)
              )
              outdir.mkdir(exist_ok=True, parents=True)
              fname = name + '.vcxproj'
              target_dir = PurePath(self.get_target_dir(target))
              relname = target_dir / fname
              projfile_path = outdir / fname
              proj_uuid = self.environment.coredata.target_guids[name]
              self.gen_vcxproj(target, str(projfile_path), proj_uuid)
              projlist.append((name, relname, proj_uuid))
  
          # Put the startup project first in the project list
          if startup_idx:
              projlist = [projlist[startup_idx]] + projlist[0:startup_idx] + projlist[startup_idx + 1:-1]
  
          return projlist
  
      def split_sources(self, srclist):
          sources = []
          headers = []
          objects = []
          languages = []
          for i in srclist:
              if self.environment.is_header(i):
                  headers.append(i)
              elif self.environment.is_object(i):
                  objects.append(i)
              elif self.environment.is_source(i):
                  sources.append(i)
                  lang = self.lang_from_source_file(i)
                  if lang not in languages:
                      languages.append(lang)
              elif self.environment.is_library(i):
                  pass
              else:
                  # Everything that is not an object or source file is considered a header.
                  headers.append(i)
          return sources, headers, objects, languages
  
      def target_to_build_root(self, target):
          if self.get_target_dir(target) == '':
              return ''
  
          directories = os.path.normpath(self.get_target_dir(target)).split(os.sep)
          return os.sep.join(['..'] * len(directories))
  
      def quote_arguments(self, arr):
          return ['"%s"' % i for i in arr]
  
      def add_project_reference(self, root, include, projid):
          ig = ET.SubElement(root, 'ItemGroup')
          pref = ET.SubElement(ig, 'ProjectReference', Include=include)
          ET.SubElement(pref, 'Project').text = '{%s}' % projid
  
      def create_basic_crap(self, target, guid):
          project_name = target.name
          root = ET.Element('Project', {'DefaultTargets': "Build",
                                        'ToolsVersion': '4.0',
                                        'xmlns': 'http://schemas.microsoft.com/developer/msbuild/2003'})
          confitems = ET.SubElement(root, 'ItemGroup', {'Label': 'ProjectConfigurations'})
          prjconf = ET.SubElement(confitems, 'ProjectConfiguration',
                                  {'Include': self.buildtype + '|' + self.platform})
          p = ET.SubElement(prjconf, 'Configuration')
          p.text = self.buildtype
          pl = ET.SubElement(prjconf, 'Platform')
          pl.text = self.platform
          globalgroup = ET.SubElement(root, 'PropertyGroup', Label='Globals')
          guidelem = ET.SubElement(globalgroup, 'ProjectGuid')
          guidelem.text = '{%s}' % guid
          kw = ET.SubElement(globalgroup, 'Keyword')
          kw.text = self.platform + 'Proj'
          p = ET.SubElement(globalgroup, 'Platform')
          p.text = self.platform
          pname = ET.SubElement(globalgroup, 'ProjectName')
          pname.text = project_name
          if self.windows_target_platform_version:
              ET.SubElement(globalgroup, 'WindowsTargetPlatformVersion').text = self.windows_target_platform_version
          ET.SubElement(root, 'Import', Project='$(VCTargetsPath)\Microsoft.Cpp.Default.props')
          type_config = ET.SubElement(root, 'PropertyGroup', Label='Configuration')
          ET.SubElement(type_config, 'ConfigurationType')
          ET.SubElement(type_config, 'CharacterSet').text = 'MultiByte'
          ET.SubElement(type_config, 'UseOfMfc').text = 'false'
          if self.platform_toolset:
              ET.SubElement(type_config, 'PlatformToolset').text = self.platform_toolset
          ET.SubElement(root, 'Import', Project='$(VCTargetsPath)\Microsoft.Cpp.props')
          direlem = ET.SubElement(root, 'PropertyGroup')
          fver = ET.SubElement(direlem, '_ProjectFileVersion')
          fver.text = self.project_file_version
          outdir = ET.SubElement(direlem, 'OutDir')
          outdir.text = '.\\'
          intdir = ET.SubElement(direlem, 'IntDir')
          intdir.text = target.get_id() + '\\'
          tname = ET.SubElement(direlem, 'TargetName')
          tname.text = target.name
          return root
  
      def gen_run_target_vcxproj(self, target, ofname, guid):
          root = self.create_basic_crap(target, guid)
          action = ET.SubElement(root, 'ItemDefinitionGroup')
          customstep = ET.SubElement(action, 'PostBuildEvent')
          cmd_raw = [target.command] + target.args
          cmd = python_command + \
              [os.path.join(self.environment.get_script_dir(), 'commandrunner.py'),
               self.environment.get_build_dir(),
               self.environment.get_source_dir(),
               self.get_target_dir(target)] + self.environment.get_build_command()
          for i in cmd_raw:
              if isinstance(i, build.BuildTarget):
                  cmd.append(os.path.join(self.environment.get_build_dir(), self.get_target_filename(i)))
              elif isinstance(i, dependencies.ExternalProgram):
                  cmd += i.get_command()
              elif isinstance(i, File):
                  relfname = i.rel_to_builddir(self.build_to_src)
                  cmd.append(os.path.join(self.environment.get_build_dir(), relfname))
              else:
                  cmd.append(i)
          cmd_templ = '''"%s" ''' * len(cmd)
          ET.SubElement(customstep, 'Command').text = cmd_templ % tuple(cmd)
          ET.SubElement(customstep, 'Message').text = 'Running custom command.'
          ET.SubElement(root, 'Import', Project='$(VCTargetsPath)\Microsoft.Cpp.targets')
          self._prettyprint_vcxproj_xml(ET.ElementTree(root), ofname)
  
      def gen_custom_target_vcxproj(self, target, ofname, guid):
          root = self.create_basic_crap(target, guid)
          action = ET.SubElement(root, 'ItemDefinitionGroup')
          customstep = ET.SubElement(action, 'CustomBuildStep')
          # We need to always use absolute paths because our invocation is always
          # from the target dir, not the build root.
          target.absolute_paths = True
          (srcs, ofilenames, cmd) = self.eval_custom_target_command(target, True)
          depend_files = self.get_custom_target_depend_files(target, True)
          # Always use a wrapper because MSBuild eats random characters when
          # there are many arguments.
          tdir_abs = os.path.join(self.environment.get_build_dir(), self.get_target_dir(target))
          extra_bdeps = target.get_transitive_build_target_deps()
          extra_paths = self.determine_windows_extra_paths(target.command[0], extra_bdeps)
          exe_data = self.serialize_executable(target.name, target.command[0], cmd[1:],
                                               # All targets run from the target dir
                                               tdir_abs,
                                               extra_paths=extra_paths,
                                               capture=ofilenames[0] if target.capture else None)
          wrapper_cmd = self.environment.get_build_command() + ['--internal', 'exe', exe_data]
          ET.SubElement(customstep, 'Command').text = ' '.join(self.quote_arguments(wrapper_cmd))
          ET.SubElement(customstep, 'Outputs').text = ';'.join(ofilenames)
          ET.SubElement(customstep, 'Inputs').text = ';'.join([exe_data] + srcs + depend_files)
          ET.SubElement(root, 'Import', Project='$(VCTargetsPath)\Microsoft.Cpp.targets')
          self.generate_custom_generator_commands(target, root)
          self._prettyprint_vcxproj_xml(ET.ElementTree(root), ofname)
  
      @classmethod
      def lang_from_source_file(cls, src):
          ext = src.split('.')[-1]
          if ext in compilers.c_suffixes:
              return 'c'
          if ext in compilers.cpp_suffixes:
              return 'cpp'
          raise MesonException('Could not guess language from source file %s.' % src)
  
      def add_pch(self, inc_cl, proj_to_src_dir, pch_sources, source_file):
          if len(pch_sources) <= 1:
              # We only need per file precompiled headers if we have more than 1 language.
              return
          lang = Vs2010Backend.lang_from_source_file(source_file)
          header = os.path.join(proj_to_src_dir, pch_sources[lang][0])
          pch_file = ET.SubElement(inc_cl, 'PrecompiledHeaderFile')
          pch_file.text = header
          pch_include = ET.SubElement(inc_cl, 'ForcedIncludeFiles')
          pch_include.text = header + ';%(ForcedIncludeFiles)'
          pch_out = ET.SubElement(inc_cl, 'PrecompiledHeaderOutputFile')
          pch_out.text = '$(IntDir)$(TargetName)-%s.pch' % lang
  
      def is_argument_with_msbuild_xml_entry(self, entry):
          # Remove arguments that have a top level XML entry so
          # they are not used twice.
          # FIXME add args as needed.
          return entry[1:].startswith('M')
  
      def add_additional_options(self, lang, parent_node, file_args):
          args = []
          for arg in file_args[lang].to_native():
              if self.is_argument_with_msbuild_xml_entry(arg):
                  continue
              if arg == '%(AdditionalOptions)':
                  args.append(arg)
              else:
                  args.append(self.escape_additional_option(arg))
          ET.SubElement(parent_node, "AdditionalOptions").text = ' '.join(args)
  
      def add_preprocessor_defines(self, lang, parent_node, file_defines):
          defines = []
          for define in file_defines[lang]:
              if define == '%(PreprocessorDefinitions)':
                  defines.append(define)
              else:
                  defines.append(self.escape_preprocessor_define(define))
          ET.SubElement(parent_node, "PreprocessorDefinitions").text = ';'.join(defines)
  
      def add_include_dirs(self, lang, parent_node, file_inc_dirs):
          dirs = file_inc_dirs[lang]
          ET.SubElement(parent_node, "AdditionalIncludeDirectories").text = ';'.join(dirs)
  
      @staticmethod
      def has_objects(objects, additional_objects, generated_objects):
          # Ignore generated objects, those are automatically used by MSBuild because they are part of
          # the CustomBuild Outputs.
          return len(objects) + len(additional_objects) > 0
  
      @staticmethod
      def add_generated_objects(node, generated_objects):
          # Do not add generated objects to project file. Those are automatically used by MSBuild, because
          # they are part of the CustomBuild Outputs.
          return
  
      @staticmethod
      def escape_preprocessor_define(define):
          # See: https://msdn.microsoft.com/en-us/library/bb383819.aspx
          table = str.maketrans({'%': '%25', '$': '%24', '@': '%40',
                                 "'": '%27', ';': '%3B', '?': '%3F', '*': '%2A',
                                 # We need to escape backslash because it'll be un-escaped by
                                 # Windows during process creation when it parses the arguments
                                 # Basically, this converts `\` to `\\`.
                                 '\\': '\\\\'})
          return define.translate(table)
  
      @staticmethod
      def escape_additional_option(option):
          # See: https://msdn.microsoft.com/en-us/library/bb383819.aspx
          table = str.maketrans({'%': '%25', '$': '%24', '@': '%40',
                                 "'": '%27', ';': '%3B', '?': '%3F', '*': '%2A', ' ': '%20'})
          option = option.translate(table)
          # Since we're surrounding the option with ", if it ends in \ that will
          # escape the " when the process arguments are parsed and the starting
          # " will not terminate. So we escape it if that's the case.  I'm not
          # kidding, this is how escaping works for process args on Windows.
          if option.endswith('\\'):
              option += '\\'
          return '"{}"'.format(option)
  
      @staticmethod
      def split_link_args(args):
          """
          Split a list of link arguments into three lists:
          * library search paths
          * library filenames (or paths)
          * other link arguments
          """
          lpaths = []
          libs = []
          other = []
          for arg in args:
              if arg.startswith('/LIBPATH:'):
                  lpath = arg[9:]
                  # De-dup library search paths by removing older entries when
                  # a new one is found. This is necessary because unlike other
                  # search paths such as the include path, the library is
                  # searched for in the newest (right-most) search path first.
                  if lpath in lpaths:
                      lpaths.remove(lpath)
                  lpaths.append(lpath)
              elif arg.startswith(('/', '-')):
                  other.append(arg)
              # It's ok if we miss libraries with non-standard extensions here.
              # They will go into the general link arguments.
              elif arg.endswith('.lib') or arg.endswith('.a'):
                  # De-dup
                  if arg not in libs:
                      libs.append(arg)
              else:
                  other.append(arg)
          return lpaths, libs, other
  
      def _get_cl_compiler(self, target):
          for lang, c in target.compilers.items():
              if lang in ('c', 'cpp'):
                  return c
          # No source files, only objects, but we still need a compiler, so
          # return a found compiler
          if len(target.objects) > 0:
              for lang, c in self.environment.coredata.compilers.items():
                  if lang in ('c', 'cpp'):
                      return c
          raise MesonException('Could not find a C or C++ compiler. MSVC can only build C/C++ projects.')
  
      def _prettyprint_vcxproj_xml(self, tree, ofname):
          tree.write(ofname, encoding='utf-8', xml_declaration=True)
          # ElementTree can not do prettyprinting so do it manually
          doc = xml.dom.minidom.parse(ofname)
          with open(ofname, 'w', encoding='utf-8') as of:
              of.write(doc.toprettyxml())
  
      def gen_vcxproj(self, target, ofname, guid):
          mlog.debug('Generating vcxproj %s.' % target.name)
          entrypoint = 'WinMainCRTStartup'
          subsystem = 'Windows'
          if isinstance(target, build.Executable):
              conftype = 'Application'
              if not target.gui_app:
                  subsystem = 'Console'
                  entrypoint = 'mainCRTStartup'
          elif isinstance(target, build.StaticLibrary):
              conftype = 'StaticLibrary'
          elif isinstance(target, build.SharedLibrary):
              conftype = 'DynamicLibrary'
              entrypoint = '_DllMainCrtStartup'
          elif isinstance(target, build.CustomTarget):
              return self.gen_custom_target_vcxproj(target, ofname, guid)
          elif isinstance(target, build.RunTarget):
              return self.gen_run_target_vcxproj(target, ofname, guid)
          else:
              raise MesonException('Unknown target type for %s' % target.get_basename())
          # Prefix to use to access the build root from the vcxproj dir
          down = self.target_to_build_root(target)
          # Prefix to use to access the source tree's root from the vcxproj dir
          proj_to_src_root = os.path.join(down, self.build_to_src)
          # Prefix to use to access the source tree's subdir from the vcxproj dir
          proj_to_src_dir = os.path.join(proj_to_src_root, self
  
  [... the rest is omitted ...]
files: mesonbuild/backend/vs2010backend.py
files: # Copyright 2012-2016 The Meson development team
  
  # 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 configparser, os, platform, re, sys, shlex, shutil, subprocess
  
  from . import coredata
  from .linkers import ArLinker, ArmarLinker, VisualStudioLinker, DLinker, CcrxLinker
  from . import mesonlib
  from .mesonlib import MesonException, EnvironmentException, PerMachine, Popen_safe
  from . import mlog
  
  from . import compilers
  from .compilers import (
      CompilerType,
      is_assembly,
      is_header,
      is_library,
      is_llvm_ir,
      is_object,
      is_source,
  )
  from .compilers import (
      ArmCCompiler,
      ArmCPPCompiler,
      ArmclangCCompiler,
      ArmclangCPPCompiler,
      ClangCCompiler,
      ClangCPPCompiler,
      ClangObjCCompiler,
      ClangObjCPPCompiler,
      ClangClCCompiler,
      ClangClCPPCompiler,
      G95FortranCompiler,
      GnuCCompiler,
      GnuCPPCompiler,
      GnuFortranCompiler,
      GnuObjCCompiler,
      GnuObjCPPCompiler,
      ElbrusCCompiler,
      ElbrusCPPCompiler,
      ElbrusFortranCompiler,
      IntelCCompiler,
      IntelCPPCompiler,
      IntelFortranCompiler,
      JavaCompiler,
      MonoCompiler,
      VisualStudioCsCompiler,
      NAGFortranCompiler,
      Open64FortranCompiler,
      PathScaleFortranCompiler,
      PGIFortranCompiler,
      RustCompiler,
      CcrxCCompiler,
      CcrxCPPCompiler,
      SunFortranCompiler,
      ValaCompiler,
      VisualStudioCCompiler,
      VisualStudioCPPCompiler,
  )
  
  build_filename = 'meson.build'
  
  known_cpu_families = (
      'aarch64',
      'arc',
      'arm',
      'e2k',
      'ia64',
      'mips',
      'mips64',
      'parisc',
      'ppc',
      'ppc64',
      'riscv32',
      'riscv64',
      'rx',
      's390x',
      'sparc',
      'sparc64',
      'x86',
      'x86_64'
  )
  
  def detect_gcovr(version='3.1', log=False):
      gcovr_exe = 'gcovr'
      try:
          p, found = Popen_safe([gcovr_exe, '--version'])[0:2]
      except (FileNotFoundError, PermissionError):
          # Doesn't exist in PATH or isn't executable
          return None, None
      found = search_version(found)
      if p.returncode == 0:
          if log:
              mlog.log('Found gcovr-{} at {}'.format(found, shlex.quote(shutil.which(gcovr_exe))))
          return gcovr_exe, mesonlib.version_compare(found, '>=' + version)
      return None, None
  
  def find_coverage_tools():
      gcovr_exe, gcovr_new_rootdir = detect_gcovr()
  
      lcov_exe = 'lcov'
      genhtml_exe = 'genhtml'
  
      if not mesonlib.exe_exists([lcov_exe, '--version']):
          lcov_exe = None
      if not mesonlib.exe_exists([genhtml_exe, '--version']):
          genhtml_exe = None
  
      return gcovr_exe, gcovr_new_rootdir, lcov_exe, genhtml_exe
  
  def detect_ninja(version='1.5', log=False):
      for n in ['ninja', 'ninja-build', 'samu']:
          try:
              p, found = Popen_safe([n, '--version'])[0:2]
          except (FileNotFoundError, PermissionError):
              # Doesn't exist in PATH or isn't executable
              continue
          found = found.strip()
          # Perhaps we should add a way for the caller to know the failure mode
          # (not found or too old)
          if p.returncode == 0 and mesonlib.version_compare(found, '>=' + version):
              if log:
                  mlog.log('Found ninja-{} at {}'.format(found, shlex.quote(shutil.which(n))))
              return n
  
  def detect_native_windows_arch():
      """
      The architecture of Windows itself: x86 or amd64
      """
      # These env variables are always available. See:
      # https://msdn.microsoft.com/en-us/library/aa384274(VS.85).aspx
      # https://blogs.msdn.microsoft.com/david.wang/2006/03/27/howto-detect-process-bitness/
      arch = os.environ.get('PROCESSOR_ARCHITEW6432', '').lower()
      if not arch:
          try:
              # If this doesn't exist, something is messing with the environment
              arch = os.environ['PROCESSOR_ARCHITECTURE'].lower()
          except KeyError:
              raise EnvironmentException('Unable to detect native OS architecture')
      return arch
  
  def detect_windows_arch(compilers):
      """
      Detecting the 'native' architecture of Windows is not a trivial task. We
      cannot trust that the architecture that Python is built for is the 'native'
      one because you can run 32-bit apps on 64-bit Windows using WOW64 and
      people sometimes install 32-bit Python on 64-bit Windows.
  
      We also can't rely on the architecture of the OS itself, since it's
      perfectly normal to compile and run 32-bit applications on Windows as if
      they were native applications. It's a terrible experience to require the
      user to supply a cross-info file to compile 32-bit applications on 64-bit
      Windows. Thankfully, the only way to compile things with Visual Studio on
      Windows is by entering the 'msvc toolchain' environment, which can be
      easily detected.
  
      In the end, the sanest method is as follows:
      1. Check if we're in an MSVC toolchain environment, and if so, return the
         MSVC toolchain architecture as our 'native' architecture.
      2. If not, check environment variables that are set by Windows and WOW64 to
         find out the architecture that Windows is built for, and use that as our
         'native' architecture.
      """
      os_arch = detect_native_windows_arch()
      if os_arch != 'amd64':
          return os_arch
      # If we're on 64-bit Windows, 32-bit apps can be compiled without
      # cross-compilation. So if we're doing that, just set the native arch as
      # 32-bit and pretend like we're running under WOW64. Else, return the
      # actual Windows architecture that we deduced above.
      for compiler in compilers.values():
          # Check if we're using and inside an MSVC toolchain environment
          if compiler.id == 'msvc' and 'VCINSTALLDIR' in os.environ:
              if float(compiler.get_toolset_version()) < 10.0:
                  # On MSVC 2008 and earlier, check 'BUILD_PLAT', where
                  # 'Win32' means 'x86'
                  platform = os.environ.get('BUILD_PLAT', 'x86')
                  if platform == 'Win32':
                      return 'x86'
              elif 'VSCMD_ARG_TGT_ARCH' in os.environ:
                  # On MSVC 2017 'Platform' is not set in VsDevCmd.bat
                  return os.environ['VSCMD_ARG_TGT_ARCH']
              else:
                  # On MSVC 2010 and later 'Platform' is only set when the
                  # target arch is not 'x86'.  It's 'x64' when targeting
                  # x86_64 and 'arm' when targeting ARM.
                  platform = os.environ.get('Platform', 'x86').lower()
              if platform == 'x86':
                  return platform
          if compiler.id == 'clang-cl' and not compiler.is_64:
              return 'x86'
          if compiler.id == 'gcc' and compiler.has_builtin_define('__i386__'):
              return 'x86'
      return os_arch
  
  def detect_cpu_family(compilers):
      """
      Python is inconsistent in its platform module.
      It returns different values for the same cpu.
      For x86 it might return 'x86', 'i686' or somesuch.
      Do some canonicalization.
      """
      if mesonlib.is_windows():
          trial = detect_windows_arch(compilers)
      else:
          trial = platform.machine().lower()
      if trial.startswith('i') and trial.endswith('86'):
          return 'x86'
      if trial.startswith('arm'):
          return 'arm'
      if trial.startswith('ppc64'):
          return 'ppc64'
      if trial == 'powerpc':
          # FreeBSD calls both ppc and ppc64 "powerpc".
          # https://github.com/mesonbuild/meson/issues/4397
          try:
              p, stdo, _ = Popen_safe(['uname', '-p'])
          except (FileNotFoundError, PermissionError):
              # Not much to go on here.
              if sys.maxsize > 2**32:
                  return 'ppc64'
              return 'ppc'
          if 'powerpc64' in stdo:
              return 'ppc64'
          return 'ppc'
      if trial in ('amd64', 'x64'):
          trial = 'x86_64'
      if trial == 'x86_64':
          # On Linux (and maybe others) there can be any mixture of 32/64 bit
          # code in the kernel, Python, system etc. The only reliable way
          # to know is to check the compiler defines.
          for c in compilers.values():
              try:
                  if c.has_builtin_define('__i386__'):
                      return 'x86'
              except mesonlib.MesonException:
                  # Ignore compilers that do not support has_builtin_define.
                  pass
          return 'x86_64'
      # Add fixes here as bugs are reported.
  
      if trial not in known_cpu_families:
          mlog.warning('Unknown CPU family {!r}, please report this at '
                       'https://github.com/mesonbuild/meson/issues/new with the'
                       'output of `uname -a` and `cat /proc/cpuinfo`'.format(trial))
  
      return trial
  
  def detect_cpu(compilers):
      if mesonlib.is_windows():
          trial = detect_windows_arch(compilers)
      else:
          trial = platform.machine().lower()
      if trial in ('amd64', 'x64'):
          trial = 'x86_64'
      if trial == 'x86_64':
          # Same check as above for cpu_family
          for c in compilers.values():
              try:
                  if c.has_builtin_define('__i386__'):
                      return 'i686' # All 64 bit cpus have at least this level of x86 support.
              except mesonlib.MesonException:
                  pass
          return 'x86_64'
      if trial == 'e2k':
          # Make more precise CPU detection for Elbrus platform.
          trial = platform.processor().lower()
      # Add fixes here as bugs are reported.
      return trial
  
  def detect_system():
      system = platform.system().lower()
      if system.startswith('cygwin'):
          return 'cygwin'
      return system
  
  def detect_msys2_arch():
      if 'MSYSTEM_CARCH' in os.environ:
          return os.environ['MSYSTEM_CARCH']
      return None
  
  def search_version(text):
      # Usually of the type 4.1.4 but compiler output may contain
      # stuff like this:
      # (Sourcery CodeBench Lite 2014.05-29) 4.8.3 20140320 (prerelease)
      # Limiting major version number to two digits seems to work
      # thus far. When we get to GCC 100, this will break, but
      # if we are still relevant when that happens, it can be
      # considered an achievement in itself.
      #
      # This regex is reaching magic levels. If it ever needs
      # to be updated, do not complexify but convert to something
      # saner instead.
      version_regex = '(?<!(\d|\.))(\d{1,2}(\.\d+)+(-[a-zA-Z0-9]+)?)'
      match = re.search(version_regex, text)
      if match:
          return match.group(0)
      return 'unknown version'
  
  class Environment:
      private_dir = 'meson-private'
      log_dir = 'meson-logs'
  
      def __init__(self, source_dir, build_dir, options):
          self.source_dir = source_dir
          self.build_dir = build_dir
          self.scratch_dir = os.path.join(build_dir, Environment.private_dir)
          self.log_dir = os.path.join(build_dir, Environment.log_dir)
          os.makedirs(self.scratch_dir, exist_ok=True)
          os.makedirs(self.log_dir, exist_ok=True)
          try:
              self.coredata = coredata.load(self.get_build_dir())
              self.first_invocation = False
          except FileNotFoundError:
              self.create_new_coredata(options)
          except MesonException as e:
              # If we stored previous command line options, we can recover from
              # a broken/outdated coredata.
              if os.path.isfile(coredata.get_cmd_line_file(self.build_dir)):
                  mlog.warning('Regenerating configuration from scratch.')
                  mlog.log('Reason:', mlog.red(str(e)))
                  coredata.read_cmd_line_file(self.build_dir, options)
                  self.create_new_coredata(options)
              else:
                  raise e
          self.exe_wrapper = None
  
          self.machines = MachineInfos()
          # Will be fully initialized later using compilers later.
          self.machines.detect_build()
          if self.coredata.cross_file:
              self.cross_info = CrossBuildInfo(self.coredata.cross_file)
              if 'exe_wrapper' in self.cross_info.config['binaries']:
                  from .dependencies import ExternalProgram
                  self.exe_wrapper = ExternalProgram.from_bin_list(
                      self.cross_info.config['binaries'], 'exe_wrapper')
              if 'host_machine' in self.cross_info.config:
                  self.machines.host = MachineInfo.from_literal(
                      self.cross_info.config['host_machine'])
              if 'target_machine' in self.cross_info.config:
                  self.machines.target = MachineInfo.from_literal(
                      self.cross_info.config['target_machine'])
          else:
              self.cross_info = None
          self.machines.default_missing()
  
          if self.coredata.config_files:
              self.config_info = coredata.ConfigData(
                  coredata.load_configs(self.coredata.config_files))
          else:
              self.config_info = coredata.ConfigData()
  
          self.cmd_line_options = options.cmd_line_options.copy()
  
          # List of potential compilers.
          if mesonlib.is_windows():
              self.default_c = ['cl', 'cc', 'gcc', 'clang', 'clang-cl']
              self.default_cpp = ['cl', 'c++', 'g++', 'clang++', 'clang-cl']
          else:
              self.default_c = ['cc', 'gcc', 'clang']
              self.default_cpp = ['c++', 'g++', 'clang++']
          if mesonlib.is_windows():
              self.default_cs = ['csc', 'mcs']
          else:
              self.default_cs = ['mcs', 'csc']
          self.default_objc = ['cc']
          self.default_objcpp = ['c++']
          self.default_d = ['ldc2', 'ldc', 'gdc', 'dmd']
          self.default_fortran = ['gfortran', 'g95', 'f95', 'f90', 'f77', 'ifort']
          self.default_java = ['javac']
          self.default_rust = ['rustc']
          self.default_swift = ['swiftc']
          self.default_vala = ['valac']
          self.default_static_linker = ['ar']
          self.vs_static_linker = ['lib']
          self.clang_cl_static_linker = ['llvm-lib']
          self.gcc_static_linker = ['gcc-ar']
          self.clang_static_linker = ['llvm-ar']
  
          # Various prefixes and suffixes for import libraries, shared libraries,
          # static libraries, and executables.
          # Versioning is added to these names in the backends as-needed.
          cross = self.is_cross_build()
          if mesonlib.for_windows(cross, self):
              self.exe_suffix = 'exe'
              self.object_suffix = 'obj'
              self.win_libdir_layout = True
          elif mesonlib.for_cygwin(cross, self):
              self.exe_suffix = 'exe'
              self.object_suffix = 'o'
              self.win_libdir_layout = True
          else:
              self.exe_suffix = ''
              self.object_suffix = 'o'
              self.win_libdir_layout = False
          if 'STRIP' in os.environ:
              self.native_strip_bin = shlex.split(
                  os.environ[BinaryTable.evarMap['strip']])
          else:
              self.native_strip_bin = ['strip']
  
      def create_new_coredata(self, options):
          # WARNING: Don't use any values from coredata in __init__. It gets
          # re-initialized with project options by the interpreter during
          # build file parsing.
          self.coredata = coredata.CoreData(options)
          # Used by the regenchecker script, which runs meson
          self.coredata.meson_command = mesonlib.meson_command
          self.first_invocation = True
  
      def is_cross_build(self):
          return self.cross_info is not None
  
      def dump_coredata(self):
          return coredata.save(self.coredata, self.get_build_dir())
  
      def get_script_dir(self):
          import mesonbuild.scripts
          return os.path.dirname(mesonbuild.scripts.__file__)
  
      def get_log_dir(self):
          return self.log_dir
  
      def get_coredata(self):
          return self.coredata
  
      def get_build_command(self, unbuffered=False):
          cmd = mesonlib.meson_command[:]
          if unbuffered and 'python' in os.path.basename(cmd[0]):
              cmd.insert(1, '-u')
          return cmd
  
      def is_header(self, fname):
          return is_header(fname)
  
      def is_source(self, fname):
          return is_source(fname)
  
      def is_assembly(self, fname):
          return is_assembly(fname)
  
      def is_llvm_ir(self, fname):
          return is_llvm_ir(fname)
  
      def is_object(self, fname):
          return is_object(fname)
  
      def is_library(self, fname):
          return is_library(fname)
  
      @staticmethod
      def get_gnu_compiler_defines(compiler):
          """
          Detect GNU compiler platform type (Apple, MinGW, Unix)
          """
          # Arguments to output compiler pre-processor defines to stdout
          # gcc, g++, and gfortran all support these arguments
          args = compiler + ['-E', '-dM', '-']
          p, output, error = Popen_safe(args, write='', stdin=subprocess.PIPE)
          if p.returncode != 0:
              raise EnvironmentException('Unable to detect GNU compiler type:\n' + output + error)
          # Parse several lines of the type:
          # `#define ___SOME_DEF some_value`
          # and extract `___SOME_DEF`
          defines = {}
          for line in output.split('\n'):
              if not line:
                  continue
              d, *rest = line.split(' ', 2)
              if d != '#define':
                  continue
              if len(rest) == 1:
                  defines[rest] = True
              if len(rest) == 2:
                  defines[rest[0]] = rest[1]
          return defines
  
      @staticmethod
      def get_gnu_version_from_defines(defines):
          dot = '.'
          major = defines.get('__GNUC__', '0')
          minor = defines.get('__GNUC_MINOR__', '0')
          patch = defines.get('__GNUC_PATCHLEVEL__', '0')
          return dot.join((major, minor, patch))
  
      @staticmethod
      def get_lcc_version_from_defines(defines):
          dot = '.'
          generation_and_major = defines.get('__LCC__', '100')
          generation = generation_and_major[:1]
          major = generation_and_major[1:]
          minor = defines.get('__LCC_MINOR__', '0')
          return dot.join((generation, major, minor))
  
      @staticmethod
      def get_gnu_compiler_type(defines):
          # Detect GCC type (Apple, MinGW, Cygwin, Unix)
          if '__APPLE__' in defines:
              return CompilerType.GCC_OSX
          elif '__MINGW32__' in defines or '__MINGW64__' in defines:
              return CompilerType.GCC_MINGW
          elif '__CYGWIN__' in defines:
              return CompilerType.GCC_CYGWIN
          return CompilerType.GCC_STANDARD
  
      def _get_compilers(self, lang, want_cross):
          '''
          The list of compilers is detected in the exact same way for
          C, C++, ObjC, ObjC++, Fortran, CS so consolidate it here.
          '''
          is_cross = False
          exe_wrap = None
          evar = BinaryTable.evarMap[lang]
  
          if self.is_cross_build() and want_cross:
              if lang not in self.cross_info.config['binaries']:
                  raise EnvironmentException('{!r} compiler binary not defined in cross file'.format(lang))
              compilers, ccache = BinaryTable.parse_entry(
                  mesonlib.stringlistify(self.cross_info.config['binaries'][lang]))
              BinaryTable.warn_about_lang_pointing_to_cross(compilers[0], evar)
              # Return value has to be a list of compiler 'choices'
              compilers = [compilers]
              is_cross = True
              exe_wrap = self.get_exe_wrapper()
          elif evar in os.environ:
              compilers, ccache = BinaryTable.parse_entry(
                  shlex.split(os.environ[evar]))
              # Return value has to be a list of compiler 'choices'
              compilers = [compilers]
          elif lang in self.config_info.binaries:
              compilers, ccache = BinaryTable.parse_entry(
                  mesonlib.stringlistify(self.config_info.binaries[lang]))
              compilers = [compilers]
          else:
              compilers = getattr(self, 'default_' + lang)
              ccache = BinaryTable.detect_ccache()
          return compilers, ccache, is_cross, exe_wrap
  
      def _handle_exceptions(self, exceptions, binaries, bintype='compiler'):
          errmsg = 'Unknown {}(s): {}'.format(bintype, binaries)
          if exceptions:
              errmsg += '\nThe follow exceptions were encountered:'
              for (c, e) in exceptions.items():
                  errmsg += '\nRunning "{0}" gave "{1}"'.format(c, e)
          raise EnvironmentException(errmsg)
  
      def _detect_c_or_cpp_compiler(self, lang, want_cross):
          popen_exceptions = {}
          compilers, ccache, is_cross, exe_wrap = self._get_compilers(lang, want_cross)
          for compiler in compilers:
              if isinstance(compiler, str):
                  compiler = [compiler]
              if not set(['cl', 'cl.exe', 'clang-cl', 'clang-cl.exe']).isdisjoint(compiler):
                  # Watcom C provides it's own cl.exe clone that mimics an older
                  # version of Microsoft's compiler. Since Watcom's cl.exe is
                  # just a wrapper, we skip using it if we detect its presence
                  # so as not to confuse Meson when configuring for MSVC.
                  #
                  # Additionally the help text of Watcom's cl.exe is paged, and
                  # the binary will not exit without human intervention. In
                  # practice, Meson will block waiting for Watcom's cl.exe to
                  # exit, which requires user input and thus will never exit.
                  if 'WATCOM' in os.environ:
                      def sanitize(p):
                          return os.path.normcase(os.path.abspath(p))
  
                      watcom_cls = [sanitize(os.path.join(os.environ['WATCOM'], 'BINNT', 'cl')),
                                    sanitize(os.path.join(os.environ['WATCOM'], 'BINNT', 'cl.exe'))]
                      found_cl = sanitize(shutil.which('cl'))
                      if found_cl in watcom_cls:
                          continue
                  arg = '/?'
              elif 'armcc' in compiler[0]:
                  arg = '--vsn'
              elif 'ccrx' in compiler[0]:
                  arg = '-v'
              else:
                  arg = '--version'
              try:
                  p, out, err = Popen_safe(compiler + [arg])
              except OSError as e:
                  popen_exceptions[' '.join(compiler + [arg])] = e
                  continue
  
              if 'ccrx' in compiler[0]:
                  out = err
  
              full_version = out.split('\n', 1)[0]
              version = search_version(out)
  
              guess_gcc_or_lcc = False
              if 'Free Software Foundation' in out:
                  guess_gcc_or_lcc = 'gcc'
              if 'e2k' in out and 'lcc' in out:
                  guess_gcc_or_lcc = 'lcc'
  
              if guess_gcc_or_lcc:
                  defines = self.get_gnu_compiler_defines(compiler)
                  if not defines:
                      popen_exceptions[' '.join(compiler)] = 'no pre-processor defines'
                      continue
                  compiler_type = self.get_gnu_compiler_type(defines)
                  if guess_gcc_or_lcc == 'lcc':
                      version = self.get_lcc_version_from_defines(defines)
                      cls = ElbrusCCompiler if lang == 'c' else ElbrusCPPCompiler
                  else:
                      version = self.get_gnu_version_from_defines(defines)
                      cls = GnuCCompiler if lang == 'c' else GnuCPPCompiler
                  return cls(ccache + compiler, version, compiler_type, is_cross, exe_wrap, defines, full_version=full_version)
  
              if 'armclang' in out:
                  # The compiler version is not present in the first line of output,
                  # instead it is present in second line, startswith 'Component:'.
                  # So, searching for the 'Component' in out although we know it is
                  # present in second line, as we are not sure about the
                  # output format in future versions
                  arm_ver_str = re.search('.*Component.*', out)
                  if arm_ver_str is None:
                      popen_exceptions[' '.join(compiler)] = 'version string not found'
                      continue
                  arm_ver_str = arm_ver_str.group(0)
                  # Override previous values
                  version = search_version(arm_ver_str)
                  full_version = arm_ver_str
                  compiler_type = CompilerType.ARM_WIN
                  cls = ArmclangCCompiler if lang == 'c' else ArmclangCPPCompiler
                  return cls(ccache + compiler, version, compiler_type, is_cross, exe_wrap, full_version=full_version)
              if 'CL.EXE COMPATIBILITY' in out:
                  # if this is clang-cl masquerading as cl, detect it as cl, not
                  # clang
                  arg = '--version'
                  try:
                      p, out, err = Popen_safe(compiler + [arg])
                  except OSError as e:
                      popen_exceptions[' '.join(compiler + [arg])] = e
                  version = search_version(out)
                  is_64 = 'Target: x86_64' in out
                  cls = ClangClCCompiler if lang == 'c' else ClangClCPPCompiler
                  return cls(compiler, version, is_cross, exe_wrap, is_64)
              if 'clang' in out:
                  if 'Apple' in out or mesonlib.for_darwin(want_cross, self):
                      compiler_type = CompilerType.CLANG_OSX
                  elif 'windows' in out or mesonlib.for_windows(want_cross, self):
                      compiler_type = CompilerType.CLANG_MINGW
                  else:
                      compiler_type = CompilerType.CLANG_STANDARD
                  cls = ClangCCompiler if lang == 'c' else ClangCPPCompiler
                  return cls(ccache + compiler, version, compiler_type, is_cross, exe_wrap, full_version=full_version)
              if 'Microsoft' in out or 'Microsoft' in err:
                  # Latest versions of Visual Studio print version
                  # number to stderr but earlier ones print version
                  # on stdout.  Why? Lord only knows.
                  # Check both outputs to figure out version.
                  version = search_version(err)
                  if version == 'unknown version':
                      version = search_version(out)
                  if version == 'unknown version':
                      m = 'Failed to detect MSVC compiler arch: stderr was\n{!r}'
                      raise EnvironmentException(m.format(err))
                  is_64 = err.split('\n')[0].endswith(' x64')
                  cls = VisualStudioCCompiler if lang == 'c' else VisualStudioCPPCompiler
                  return cls(compiler, version, is_cross, exe_wrap, is_64)
              if '(ICC)' in out:
                  if mesonlib.for_darwin(want_cross, self):
                      compiler_type = CompilerType.ICC_OSX
                  elif mesonlib.for_windows(want_cross, self):
                      # TODO: fix ICC on Windows
                      compiler_type = CompilerType.ICC_WIN
                  else:
                      compiler_type = CompilerType.ICC_STANDARD
                  cls = IntelCCompiler if lang == 'c' else IntelCPPCompiler
                  return cls(ccache + compiler, version, compiler_type, is_cross, exe_wrap, full_version=full_version)
              if 'ARM' in out:
                  compiler_type = CompilerType.ARM_WIN
                  cls = ArmCCompiler if lang == 'c' else ArmCPPCompiler
                  return cls(ccache + compiler, version, compiler_type, is_cross, exe_wrap, full_version=full_version)
              if 'RX Family' in out:
                  compiler_type = CompilerType.CCRX_WIN
                  cls = CcrxCCompiler if lang == 'c' else CcrxCPPCompiler
                  return cls(ccache + compiler, version, compiler_type, is_cross, exe_wrap, full_version=full_version)
  
          self._handle_exceptions(popen_exceptions, compilers)
  
      def detect_c_compiler(self, want_cross):
          return self._detect_c_or_cpp_compiler('c', want_cross)
  
      def detect_cpp_compiler(self, want_cross):
          return self._detect_c_or_cpp_compiler('cpp', want_cross)
  
      def detect_fortran_compiler(self, want_cross):
          popen_exceptions = {}
          compilers, ccache, is_cross, exe_wrap = self._get_compilers('fortran', want_cross)
          for compiler in compilers:
              if isinstance(compiler, str):
                  compiler = [compiler]
              for arg in ['--version', '-V']:
                  try:
                      p, out, err = Popen_safe(compiler + [arg])
                  except OSError as e:
                      popen_exceptions[' '.join(compiler + [arg])] = e
                      continue
  
                  version = search_version(out)
                  full_version = out.split('\n', 1)[0]
  
                  guess_gcc_or_lcc = False
                  if 'GNU Fortran' in out:
                      guess_gcc_or_lcc = 'gcc'
                  if 'e2k' in out and 'lcc' in out:
                      guess_gcc_or_lcc = 'lcc'
  
                  if guess_gcc_or_lcc:
                      defines = self.get_gnu_compiler_defines(compiler)
                      if not defines:
                          popen_exceptions[' '.join(compiler)] = 'no pre-processor defines'
                          continue
                      compiler_type = self.get_gnu_compiler_type(defines)
                      if guess_gcc_or_lcc == 'lcc':
                          version = self.get_lcc_version_from_defines(defines)
                          cls = ElbrusFortranCompiler
                      else:
                          version = self.get_gnu_version_from_defines(defines)
                          cls = GnuFortranCompiler
                      return cls(compiler, version, compiler_type, is_cross, exe_wrap, defines, full_version=full_version)
  
                  if 'G95' in out:
                      return G95FortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
  
                  if 'Sun Fortran' in err:
                      version = search_version(err)
                      return SunFortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
  
                  if 'ifort (IFORT)' in out:
                      return IntelFortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
  
                  if 'PathScale EKOPath(tm)' in err:
                      return PathScaleFortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
  
                  if 'PGI Compilers' in out:
                      return PGIFortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
  
                  if 'Open64 Compiler Suite' in err:
                      return Open64FortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
  
                  if 'NAG Fortran' in err:
                      return NAGFortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
          self._handle_exceptions(popen_exceptions, compilers)
  
      def get_scratch_dir(self):
          return self.scratch_dir
  
      def detect_objc_compiler(self, want_cross):
          popen_exceptions = {}
          compilers, ccache, is_cross, exe_wrap = self._get_compilers('objc
  
  [... the rest is omitted ...]
files: mesonbuild/environment.py
files: # Copyright 2012-2016 The Meson development team
  
  # 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 configparser, os, platform, re, sys, shlex, shutil, subprocess
  
  from . import coredata
  from .linkers import ArLinker, ArmarLinker, VisualStudioLinker, DLinker, CcrxLinker
  from . import mesonlib
  from .mesonlib import MesonException, EnvironmentException, PerMachine, Popen_safe
  from . import mlog
  
  from . import compilers
  from .compilers import (
      CompilerType,
      is_assembly,
      is_header,
      is_library,
      is_llvm_ir,
      is_object,
      is_source,
  )
  from .compilers import (
      ArmCCompiler,
      ArmCPPCompiler,
      ArmclangCCompiler,
      ArmclangCPPCompiler,
      ClangCCompiler,
      ClangCPPCompiler,
      ClangObjCCompiler,
      ClangObjCPPCompiler,
      ClangClCCompiler,
      ClangClCPPCompiler,
      G95FortranCompiler,
      GnuCCompiler,
      GnuCPPCompiler,
      GnuFortranCompiler,
      GnuObjCCompiler,
      GnuObjCPPCompiler,
      ElbrusCCompiler,
      ElbrusCPPCompiler,
      ElbrusFortranCompiler,
      IntelCCompiler,
      IntelCPPCompiler,
      IntelFortranCompiler,
      JavaCompiler,
      MonoCompiler,
      VisualStudioCsCompiler,
      NAGFortranCompiler,
      Open64FortranCompiler,
      PathScaleFortranCompiler,
      PGIFortranCompiler,
      RustCompiler,
      CcrxCCompiler,
      CcrxCPPCompiler,
      SunFortranCompiler,
      ValaCompiler,
      VisualStudioCCompiler,
      VisualStudioCPPCompiler,
  )
  
  build_filename = 'meson.build'
  
  known_cpu_families = (
      'aarch64',
      'arc',
      'arm',
      'e2k',
      'ia64',
      'mips',
      'mips64',
      'parisc',
      'ppc',
      'ppc64',
      'riscv32',
      'riscv64',
      'rx',
      's390x',
      'sparc',
      'sparc64',
      'x86',
      'x86_64'
  )
  
  def detect_gcovr(version='3.1', log=False):
      gcovr_exe = 'gcovr'
      try:
          p, found = Popen_safe([gcovr_exe, '--version'])[0:2]
      except (FileNotFoundError, PermissionError):
          # Doesn't exist in PATH or isn't executable
          return None, None
      found = search_version(found)
      if p.returncode == 0:
          if log:
              mlog.log('Found gcovr-{} at {}'.format(found, shlex.quote(shutil.which(gcovr_exe))))
          return gcovr_exe, mesonlib.version_compare(found, '>=' + version)
      return None, None
  
  def find_coverage_tools():
      gcovr_exe, gcovr_new_rootdir = detect_gcovr()
  
      lcov_exe = 'lcov'
      genhtml_exe = 'genhtml'
  
      if not mesonlib.exe_exists([lcov_exe, '--version']):
          lcov_exe = None
      if not mesonlib.exe_exists([genhtml_exe, '--version']):
          genhtml_exe = None
  
      return gcovr_exe, gcovr_new_rootdir, lcov_exe, genhtml_exe
  
  def detect_ninja(version='1.5', log=False):
      for n in ['ninja', 'ninja-build', 'samu']:
          try:
              p, found = Popen_safe([n, '--version'])[0:2]
          except (FileNotFoundError, PermissionError):
              # Doesn't exist in PATH or isn't executable
              continue
          found = found.strip()
          # Perhaps we should add a way for the caller to know the failure mode
          # (not found or too old)
          if p.returncode == 0 and mesonlib.version_compare(found, '>=' + version):
              if log:
                  mlog.log('Found ninja-{} at {}'.format(found, shlex.quote(shutil.which(n))))
              return n
  
  def detect_native_windows_arch():
      """
      The architecture of Windows itself: x86 or amd64
      """
      # These env variables are always available. See:
      # https://msdn.microsoft.com/en-us/library/aa384274(VS.85).aspx
      # https://blogs.msdn.microsoft.com/david.wang/2006/03/27/howto-detect-process-bitness/
      arch = os.environ.get('PROCESSOR_ARCHITEW6432', '').lower()
      if not arch:
          try:
              # If this doesn't exist, something is messing with the environment
              arch = os.environ['PROCESSOR_ARCHITECTURE'].lower()
          except KeyError:
              raise EnvironmentException('Unable to detect native OS architecture')
      return arch
  
  def detect_windows_arch(compilers):
      """
      Detecting the 'native' architecture of Windows is not a trivial task. We
      cannot trust that the architecture that Python is built for is the 'native'
      one because you can run 32-bit apps on 64-bit Windows using WOW64 and
      people sometimes install 32-bit Python on 64-bit Windows.
  
      We also can't rely on the architecture of the OS itself, since it's
      perfectly normal to compile and run 32-bit applications on Windows as if
      they were native applications. It's a terrible experience to require the
      user to supply a cross-info file to compile 32-bit applications on 64-bit
      Windows. Thankfully, the only way to compile things with Visual Studio on
      Windows is by entering the 'msvc toolchain' environment, which can be
      easily detected.
  
      In the end, the sanest method is as follows:
      1. Check if we're in an MSVC toolchain environment, and if so, return the
         MSVC toolchain architecture as our 'native' architecture.
      2. If not, check environment variables that are set by Windows and WOW64 to
         find out the architecture that Windows is built for, and use that as our
         'native' architecture.
      """
      os_arch = detect_native_windows_arch()
      if os_arch != 'amd64':
          return os_arch
      # If we're on 64-bit Windows, 32-bit apps can be compiled without
      # cross-compilation. So if we're doing that, just set the native arch as
      # 32-bit and pretend like we're running under WOW64. Else, return the
      # actual Windows architecture that we deduced above.
      for compiler in compilers.values():
          # Check if we're using and inside an MSVC toolchain environment
          if compiler.id == 'msvc' and 'VCINSTALLDIR' in os.environ:
              if float(compiler.get_toolset_version()) < 10.0:
                  # On MSVC 2008 and earlier, check 'BUILD_PLAT', where
                  # 'Win32' means 'x86'
                  platform = os.environ.get('BUILD_PLAT', 'x86')
                  if platform == 'Win32':
                      return 'x86'
              else:
                  # On MSVC 2010 and later 'Platform' is only set when the
                  # target arch is not 'x86'.  It's 'x64' when targeting
                  # x86_64 and 'arm' when targeting ARM.
                  platform = os.environ.get('Platform', 'x86').lower()
              if platform == 'x86':
                  return platform
          if compiler.id == 'clang-cl' and not compiler.is_64:
              return 'x86'
          if compiler.id == 'gcc' and compiler.has_builtin_define('__i386__'):
              return 'x86'
      return os_arch
  
  def detect_cpu_family(compilers):
      """
      Python is inconsistent in its platform module.
      It returns different values for the same cpu.
      For x86 it might return 'x86', 'i686' or somesuch.
      Do some canonicalization.
      """
      if mesonlib.is_windows():
          trial = detect_windows_arch(compilers)
      else:
          trial = platform.machine().lower()
      if trial.startswith('i') and trial.endswith('86'):
          return 'x86'
      if trial.startswith('arm'):
          return 'arm'
      if trial.startswith('ppc64'):
          return 'ppc64'
      if trial == 'powerpc':
          # FreeBSD calls both ppc and ppc64 "powerpc".
          # https://github.com/mesonbuild/meson/issues/4397
          try:
              p, stdo, _ = Popen_safe(['uname', '-p'])
          except (FileNotFoundError, PermissionError):
              # Not much to go on here.
              if sys.maxsize > 2**32:
                  return 'ppc64'
              return 'ppc'
          if 'powerpc64' in stdo:
              return 'ppc64'
          return 'ppc'
      if trial in ('amd64', 'x64'):
          trial = 'x86_64'
      if trial == 'x86_64':
          # On Linux (and maybe others) there can be any mixture of 32/64 bit
          # code in the kernel, Python, system etc. The only reliable way
          # to know is to check the compiler defines.
          for c in compilers.values():
              try:
                  if c.has_builtin_define('__i386__'):
                      return 'x86'
              except mesonlib.MesonException:
                  # Ignore compilers that do not support has_builtin_define.
                  pass
          return 'x86_64'
      # Add fixes here as bugs are reported.
  
      if trial not in known_cpu_families:
          mlog.warning('Unknown CPU family {!r}, please report this at '
                       'https://github.com/mesonbuild/meson/issues/new with the'
                       'output of `uname -a` and `cat /proc/cpuinfo`'.format(trial))
  
      return trial
  
  def detect_cpu(compilers):
      if mesonlib.is_windows():
          trial = detect_windows_arch(compilers)
      else:
          trial = platform.machine().lower()
      if trial in ('amd64', 'x64'):
          trial = 'x86_64'
      if trial == 'x86_64':
          # Same check as above for cpu_family
          for c in compilers.values():
              try:
                  if c.has_builtin_define('__i386__'):
                      return 'i686' # All 64 bit cpus have at least this level of x86 support.
              except mesonlib.MesonException:
                  pass
          return 'x86_64'
      if trial == 'e2k':
          # Make more precise CPU detection for Elbrus platform.
          trial = platform.processor().lower()
      # Add fixes here as bugs are reported.
      return trial
  
  def detect_system():
      system = platform.system().lower()
      if system.startswith('cygwin'):
          return 'cygwin'
      return system
  
  def detect_msys2_arch():
      if 'MSYSTEM_CARCH' in os.environ:
          return os.environ['MSYSTEM_CARCH']
      return None
  
  def search_version(text):
      # Usually of the type 4.1.4 but compiler output may contain
      # stuff like this:
      # (Sourcery CodeBench Lite 2014.05-29) 4.8.3 20140320 (prerelease)
      # Limiting major version number to two digits seems to work
      # thus far. When we get to GCC 100, this will break, but
      # if we are still relevant when that happens, it can be
      # considered an achievement in itself.
      #
      # This regex is reaching magic levels. If it ever needs
      # to be updated, do not complexify but convert to something
      # saner instead.
      version_regex = '(?<!(\d|\.))(\d{1,2}(\.\d+)+(-[a-zA-Z0-9]+)?)'
      match = re.search(version_regex, text)
      if match:
          return match.group(0)
      return 'unknown version'
  
  class Environment:
      private_dir = 'meson-private'
      log_dir = 'meson-logs'
  
      def __init__(self, source_dir, build_dir, options):
          self.source_dir = source_dir
          self.build_dir = build_dir
          self.scratch_dir = os.path.join(build_dir, Environment.private_dir)
          self.log_dir = os.path.join(build_dir, Environment.log_dir)
          os.makedirs(self.scratch_dir, exist_ok=True)
          os.makedirs(self.log_dir, exist_ok=True)
          try:
              self.coredata = coredata.load(self.get_build_dir())
              self.first_invocation = False
          except FileNotFoundError:
              self.create_new_coredata(options)
          except MesonException as e:
              # If we stored previous command line options, we can recover from
              # a broken/outdated coredata.
              if os.path.isfile(coredata.get_cmd_line_file(self.build_dir)):
                  mlog.warning('Regenerating configuration from scratch.')
                  mlog.log('Reason:', mlog.red(str(e)))
                  coredata.read_cmd_line_file(self.build_dir, options)
                  self.create_new_coredata(options)
              else:
                  raise e
          self.exe_wrapper = None
  
          self.machines = MachineInfos()
          # Will be fully initialized later using compilers later.
          self.machines.detect_build()
          if self.coredata.cross_file:
              self.cross_info = CrossBuildInfo(self.coredata.cross_file)
              if 'exe_wrapper' in self.cross_info.config['binaries']:
                  from .dependencies import ExternalProgram
                  self.exe_wrapper = ExternalProgram.from_bin_list(
                      self.cross_info.config['binaries'], 'exe_wrapper')
              if 'host_machine' in self.cross_info.config:
                  self.machines.host = MachineInfo.from_literal(
                      self.cross_info.config['host_machine'])
              if 'target_machine' in self.cross_info.config:
                  self.machines.target = MachineInfo.from_literal(
                      self.cross_info.config['target_machine'])
          else:
              self.cross_info = None
          self.machines.default_missing()
  
          if self.coredata.config_files:
              self.config_info = coredata.ConfigData(
                  coredata.load_configs(self.coredata.config_files))
          else:
              self.config_info = coredata.ConfigData()
  
          self.cmd_line_options = options.cmd_line_options.copy()
  
          # List of potential compilers.
          if mesonlib.is_windows():
              self.default_c = ['cl', 'cc', 'gcc', 'clang', 'clang-cl']
              self.default_cpp = ['cl', 'c++', 'g++', 'clang++', 'clang-cl']
          else:
              self.default_c = ['cc', 'gcc', 'clang']
              self.default_cpp = ['c++', 'g++', 'clang++']
          if mesonlib.is_windows():
              self.default_cs = ['csc', 'mcs']
          else:
              self.default_cs = ['mcs', 'csc']
          self.default_objc = ['cc']
          self.default_objcpp = ['c++']
          self.default_d = ['ldc2', 'ldc', 'gdc', 'dmd']
          self.default_fortran = ['gfortran', 'g95', 'f95', 'f90', 'f77', 'ifort']
          self.default_java = ['javac']
          self.default_rust = ['rustc']
          self.default_swift = ['swiftc']
          self.default_vala = ['valac']
          self.default_static_linker = ['ar']
          self.vs_static_linker = ['lib']
          self.clang_cl_static_linker = ['llvm-lib']
          self.gcc_static_linker = ['gcc-ar']
          self.clang_static_linker = ['llvm-ar']
  
          # Various prefixes and suffixes for import libraries, shared libraries,
          # static libraries, and executables.
          # Versioning is added to these names in the backends as-needed.
          cross = self.is_cross_build()
          if mesonlib.for_windows(cross, self):
              self.exe_suffix = 'exe'
              self.object_suffix = 'obj'
              self.win_libdir_layout = True
          elif mesonlib.for_cygwin(cross, self):
              self.exe_suffix = 'exe'
              self.object_suffix = 'o'
              self.win_libdir_layout = True
          else:
              self.exe_suffix = ''
              self.object_suffix = 'o'
              self.win_libdir_layout = False
          if 'STRIP' in os.environ:
              self.native_strip_bin = shlex.split(
                  os.environ[BinaryTable.evarMap['strip']])
          else:
              self.native_strip_bin = ['strip']
  
      def create_new_coredata(self, options):
          # WARNING: Don't use any values from coredata in __init__. It gets
          # re-initialized with project options by the interpreter during
          # build file parsing.
          self.coredata = coredata.CoreData(options)
          # Used by the regenchecker script, which runs meson
          self.coredata.meson_command = mesonlib.meson_command
          self.first_invocation = True
  
      def is_cross_build(self):
          return self.cross_info is not None
  
      def dump_coredata(self):
          return coredata.save(self.coredata, self.get_build_dir())
  
      def get_script_dir(self):
          import mesonbuild.scripts
          return os.path.dirname(mesonbuild.scripts.__file__)
  
      def get_log_dir(self):
          return self.log_dir
  
      def get_coredata(self):
          return self.coredata
  
      def get_build_command(self, unbuffered=False):
          cmd = mesonlib.meson_command[:]
          if unbuffered and 'python' in os.path.basename(cmd[0]):
              cmd.insert(1, '-u')
          return cmd
  
      def is_header(self, fname):
          return is_header(fname)
  
      def is_source(self, fname):
          return is_source(fname)
  
      def is_assembly(self, fname):
          return is_assembly(fname)
  
      def is_llvm_ir(self, fname):
          return is_llvm_ir(fname)
  
      def is_object(self, fname):
          return is_object(fname)
  
      def is_library(self, fname):
          return is_library(fname)
  
      @staticmethod
      def get_gnu_compiler_defines(compiler):
          """
          Detect GNU compiler platform type (Apple, MinGW, Unix)
          """
          # Arguments to output compiler pre-processor defines to stdout
          # gcc, g++, and gfortran all support these arguments
          args = compiler + ['-E', '-dM', '-']
          p, output, error = Popen_safe(args, write='', stdin=subprocess.PIPE)
          if p.returncode != 0:
              raise EnvironmentException('Unable to detect GNU compiler type:\n' + output + error)
          # Parse several lines of the type:
          # `#define ___SOME_DEF some_value`
          # and extract `___SOME_DEF`
          defines = {}
          for line in output.split('\n'):
              if not line:
                  continue
              d, *rest = line.split(' ', 2)
              if d != '#define':
                  continue
              if len(rest) == 1:
                  defines[rest] = True
              if len(rest) == 2:
                  defines[rest[0]] = rest[1]
          return defines
  
      @staticmethod
      def get_gnu_version_from_defines(defines):
          dot = '.'
          major = defines.get('__GNUC__', '0')
          minor = defines.get('__GNUC_MINOR__', '0')
          patch = defines.get('__GNUC_PATCHLEVEL__', '0')
          return dot.join((major, minor, patch))
  
      @staticmethod
      def get_lcc_version_from_defines(defines):
          dot = '.'
          generation_and_major = defines.get('__LCC__', '100')
          generation = generation_and_major[:1]
          major = generation_and_major[1:]
          minor = defines.get('__LCC_MINOR__', '0')
          return dot.join((generation, major, minor))
  
      @staticmethod
      def get_gnu_compiler_type(defines):
          # Detect GCC type (Apple, MinGW, Cygwin, Unix)
          if '__APPLE__' in defines:
              return CompilerType.GCC_OSX
          elif '__MINGW32__' in defines or '__MINGW64__' in defines:
              return CompilerType.GCC_MINGW
          elif '__CYGWIN__' in defines:
              return CompilerType.GCC_CYGWIN
          return CompilerType.GCC_STANDARD
  
      def _get_compilers(self, lang, want_cross):
          '''
          The list of compilers is detected in the exact same way for
          C, C++, ObjC, ObjC++, Fortran, CS so consolidate it here.
          '''
          is_cross = False
          exe_wrap = None
          evar = BinaryTable.evarMap[lang]
  
          if self.is_cross_build() and want_cross:
              if lang not in self.cross_info.config['binaries']:
                  raise EnvironmentException('{!r} compiler binary not defined in cross file'.format(lang))
              compilers, ccache = BinaryTable.parse_entry(
                  mesonlib.stringlistify(self.cross_info.config['binaries'][lang]))
              BinaryTable.warn_about_lang_pointing_to_cross(compilers[0], evar)
              # Return value has to be a list of compiler 'choices'
              compilers = [compilers]
              is_cross = True
              exe_wrap = self.get_exe_wrapper()
          elif evar in os.environ:
              compilers, ccache = BinaryTable.parse_entry(
                  shlex.split(os.environ[evar]))
              # Return value has to be a list of compiler 'choices'
              compilers = [compilers]
          elif lang in self.config_info.binaries:
              compilers, ccache = BinaryTable.parse_entry(
                  mesonlib.stringlistify(self.config_info.binaries[lang]))
              compilers = [compilers]
          else:
              compilers = getattr(self, 'default_' + lang)
              ccache = BinaryTable.detect_ccache()
          return compilers, ccache, is_cross, exe_wrap
  
      def _handle_exceptions(self, exceptions, binaries, bintype='compiler'):
          errmsg = 'Unknown {}(s): {}'.format(bintype, binaries)
          if exceptions:
              errmsg += '\nThe follow exceptions were encountered:'
              for (c, e) in exceptions.items():
                  errmsg += '\nRunning "{0}" gave "{1}"'.format(c, e)
          raise EnvironmentException(errmsg)
  
      def _detect_c_or_cpp_compiler(self, lang, want_cross):
          popen_exceptions = {}
          compilers, ccache, is_cross, exe_wrap = self._get_compilers(lang, want_cross)
          for compiler in compilers:
              if isinstance(compiler, str):
                  compiler = [compiler]
              if not set(['cl', 'cl.exe', 'clang-cl', 'clang-cl.exe']).isdisjoint(compiler):
                  # Watcom C provides it's own cl.exe clone that mimics an older
                  # version of Microsoft's compiler. Since Watcom's cl.exe is
                  # just a wrapper, we skip using it if we detect its presence
                  # so as not to confuse Meson when configuring for MSVC.
                  #
                  # Additionally the help text of Watcom's cl.exe is paged, and
                  # the binary will not exit without human intervention. In
                  # practice, Meson will block waiting for Watcom's cl.exe to
                  # exit, which requires user input and thus will never exit.
                  if 'WATCOM' in os.environ:
                      def sanitize(p):
                          return os.path.normcase(os.path.abspath(p))
  
                      watcom_cls = [sanitize(os.path.join(os.environ['WATCOM'], 'BINNT', 'cl')),
                                    sanitize(os.path.join(os.environ['WATCOM'], 'BINNT', 'cl.exe'))]
                      found_cl = sanitize(shutil.which('cl'))
                      if found_cl in watcom_cls:
                          continue
                  arg = '/?'
              elif 'armcc' in compiler[0]:
                  arg = '--vsn'
              elif 'ccrx' in compiler[0]:
                  arg = '-v'
              else:
                  arg = '--version'
              try:
                  p, out, err = Popen_safe(compiler + [arg])
              except OSError as e:
                  popen_exceptions[' '.join(compiler + [arg])] = e
                  continue
  
              if 'ccrx' in compiler[0]:
                  out = err
  
              full_version = out.split('\n', 1)[0]
              version = search_version(out)
  
              guess_gcc_or_lcc = False
              if 'Free Software Foundation' in out:
                  guess_gcc_or_lcc = 'gcc'
              if 'e2k' in out and 'lcc' in out:
                  guess_gcc_or_lcc = 'lcc'
  
              if guess_gcc_or_lcc:
                  defines = self.get_gnu_compiler_defines(compiler)
                  if not defines:
                      popen_exceptions[' '.join(compiler)] = 'no pre-processor defines'
                      continue
                  compiler_type = self.get_gnu_compiler_type(defines)
                  if guess_gcc_or_lcc == 'lcc':
                      version = self.get_lcc_version_from_defines(defines)
                      cls = ElbrusCCompiler if lang == 'c' else ElbrusCPPCompiler
                  else:
                      version = self.get_gnu_version_from_defines(defines)
                      cls = GnuCCompiler if lang == 'c' else GnuCPPCompiler
                  return cls(ccache + compiler, version, compiler_type, is_cross, exe_wrap, defines, full_version=full_version)
  
              if 'armclang' in out:
                  # The compiler version is not present in the first line of output,
                  # instead it is present in second line, startswith 'Component:'.
                  # So, searching for the 'Component' in out although we know it is
                  # present in second line, as we are not sure about the
                  # output format in future versions
                  arm_ver_str = re.search('.*Component.*', out)
                  if arm_ver_str is None:
                      popen_exceptions[' '.join(compiler)] = 'version string not found'
                      continue
                  arm_ver_str = arm_ver_str.group(0)
                  # Override previous values
                  version = search_version(arm_ver_str)
                  full_version = arm_ver_str
                  compiler_type = CompilerType.ARM_WIN
                  cls = ArmclangCCompiler if lang == 'c' else ArmclangCPPCompiler
                  return cls(ccache + compiler, version, compiler_type, is_cross, exe_wrap, full_version=full_version)
              if 'CL.EXE COMPATIBILITY' in out:
                  # if this is clang-cl masquerading as cl, detect it as cl, not
                  # clang
                  arg = '--version'
                  try:
                      p, out, err = Popen_safe(compiler + [arg])
                  except OSError as e:
                      popen_exceptions[' '.join(compiler + [arg])] = e
                  version = search_version(out)
                  is_64 = 'Target: x86_64' in out
                  cls = ClangClCCompiler if lang == 'c' else ClangClCPPCompiler
                  return cls(compiler, version, is_cross, exe_wrap, is_64)
              if 'clang' in out:
                  if 'Apple' in out or mesonlib.for_darwin(want_cross, self):
                      compiler_type = CompilerType.CLANG_OSX
                  elif 'windows' in out or mesonlib.for_windows(want_cross, self):
                      compiler_type = CompilerType.CLANG_MINGW
                  else:
                      compiler_type = CompilerType.CLANG_STANDARD
                  cls = ClangCCompiler if lang == 'c' else ClangCPPCompiler
                  return cls(ccache + compiler, version, compiler_type, is_cross, exe_wrap, full_version=full_version)
              if 'Microsoft' in out or 'Microsoft' in err:
                  # Latest versions of Visual Studio print version
                  # number to stderr but earlier ones print version
                  # on stdout.  Why? Lord only knows.
                  # Check both outputs to figure out version.
                  version = search_version(err)
                  if version == 'unknown version':
                      version = search_version(out)
                  if version == 'unknown version':
                      m = 'Failed to detect MSVC compiler arch: stderr was\n{!r}'
                      raise EnvironmentException(m.format(err))
                  is_64 = err.split('\n')[0].endswith(' x64')
                  cls = VisualStudioCCompiler if lang == 'c' else VisualStudioCPPCompiler
                  return cls(compiler, version, is_cross, exe_wrap, is_64)
              if '(ICC)' in out:
                  if mesonlib.for_darwin(want_cross, self):
                      compiler_type = CompilerType.ICC_OSX
                  elif mesonlib.for_windows(want_cross, self):
                      # TODO: fix ICC on Windows
                      compiler_type = CompilerType.ICC_WIN
                  else:
                      compiler_type = CompilerType.ICC_STANDARD
                  cls = IntelCCompiler if lang == 'c' else IntelCPPCompiler
                  return cls(ccache + compiler, version, compiler_type, is_cross, exe_wrap, full_version=full_version)
              if 'ARM' in out:
                  compiler_type = CompilerType.ARM_WIN
                  cls = ArmCCompiler if lang == 'c' else ArmCPPCompiler
                  return cls(ccache + compiler, version, compiler_type, is_cross, exe_wrap, full_version=full_version)
              if 'RX Family' in out:
                  compiler_type = CompilerType.CCRX_WIN
                  cls = CcrxCCompiler if lang == 'c' else CcrxCPPCompiler
                  return cls(ccache + compiler, version, compiler_type, is_cross, exe_wrap, full_version=full_version)
  
          self._handle_exceptions(popen_exceptions, compilers)
  
      def detect_c_compiler(self, want_cross):
          return self._detect_c_or_cpp_compiler('c', want_cross)
  
      def detect_cpp_compiler(self, want_cross):
          return self._detect_c_or_cpp_compiler('cpp', want_cross)
  
      def detect_fortran_compiler(self, want_cross):
          popen_exceptions = {}
          compilers, ccache, is_cross, exe_wrap = self._get_compilers('fortran', want_cross)
          for compiler in compilers:
              if isinstance(compiler, str):
                  compiler = [compiler]
              for arg in ['--version', '-V']:
                  try:
                      p, out, err = Popen_safe(compiler + [arg])
                  except OSError as e:
                      popen_exceptions[' '.join(compiler + [arg])] = e
                      continue
  
                  version = search_version(out)
                  full_version = out.split('\n', 1)[0]
  
                  guess_gcc_or_lcc = False
                  if 'GNU Fortran' in out:
                      guess_gcc_or_lcc = 'gcc'
                  if 'e2k' in out and 'lcc' in out:
                      guess_gcc_or_lcc = 'lcc'
  
                  if guess_gcc_or_lcc:
                      defines = self.get_gnu_compiler_defines(compiler)
                      if not defines:
                          popen_exceptions[' '.join(compiler)] = 'no pre-processor defines'
                          continue
                      compiler_type = self.get_gnu_compiler_type(defines)
                      if guess_gcc_or_lcc == 'lcc':
                          version = self.get_lcc_version_from_defines(defines)
                          cls = ElbrusFortranCompiler
                      else:
                          version = self.get_gnu_version_from_defines(defines)
                          cls = GnuFortranCompiler
                      return cls(compiler, version, compiler_type, is_cross, exe_wrap, defines, full_version=full_version)
  
                  if 'G95' in out:
                      return G95FortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
  
                  if 'Sun Fortran' in err:
                      version = search_version(err)
                      return SunFortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
  
                  if 'ifort (IFORT)' in out:
                      return IntelFortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
  
                  if 'PathScale EKOPath(tm)' in err:
                      return PathScaleFortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
  
                  if 'PGI Compilers' in out:
                      return PGIFortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
  
                  if 'Open64 Compiler Suite' in err:
                      return Open64FortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
  
                  if 'NAG Fortran' in err:
                      return NAGFortranCompiler(compiler, version, is_cross, exe_wrap, full_version=full_version)
          self._handle_exceptions(popen_exceptions, compilers)
  
      def get_scratch_dir(self):
          return self.scratch_dir
  
      def detect_objc_compiler(self, want_cross):
          popen_exceptions = {}
          compilers, ccache, is_cross, exe_wrap = self._get_compilers('objc', want_cross)
          for compiler in compilers:
              if isinstance(compiler, str):
                  compiler = [compiler]
              arg = ['--version']
              try:
                  p, out, err = Popen_safe(compiler +
  
  [... the rest is omitted ...]
files: mesonbuild/environment.py