text: from conans import ConanFile, CMake, tools
  from conans.errors import ConanInvalidConfiguration
  import functools
  import os
  
  required_conan_version = ">=1.43.0"
  
  
  class SystemcConan(ConanFile):
      name = "systemc"
      description = """SystemC is a set of C++ classes and macros which provide
                       an event-driven simulation interface."""
      homepage = "https://www.accellera.org/"
      url = "https://github.com/conan-io/conan-center-index"
      license = "Apache-2.0"
      topics = ("simulation", "modeling", "esl", "tlm")
  
      settings = "os", "arch", "compiler", "build_type"
      options = {
          "shared": [True, False],
          "fPIC": [True, False],
          "disable_async_updates": [True, False],
          "disable_copyright_msg": [True, False],
          "disable_virtual_bind": [True, False],
          "enable_assertions": [True, False],
          "enable_immediate_self_notifications": [True, False],
          "enable_pthreads": [True, False],
      }
      default_options = {
          "shared": False,
          "fPIC": True,
          "disable_async_updates": False,
          "disable_copyright_msg": False,
          "disable_virtual_bind":  False,
          "enable_assertions": True,
          "enable_immediate_self_notifications": False,
          "enable_pthreads": False,
      }
  
      generators = "cmake"
  
      @property
      def _source_subfolder(self):
          return "source_subfolder"
  
      @property
      def _is_msvc(self):
          return str(self.settings.compiler) in ["Visual Studio", "msvc"]
  
      def export_sources(self):
          self.copy("CMakeLists.txt")
          for patch in self.conan_data.get("patches", {}).get(self.version, []):
              self.copy(patch["patch_file"])
  
      def config_options(self):
          if self.settings.os == "Windows":
              del self.options.fPIC
              del self.options.enable_pthreads
  
      def configure(self):
          if self.options.shared:
              del self.options.fPIC
  
      def validate(self):
          if self.settings.os == "Macos":
              raise ConanInvalidConfiguration("Macos build not supported")
  
          if self.settings.os == "Windows" and self.options.shared:
              raise ConanInvalidConfiguration("Building SystemC as a shared library on Windows is currently not supported")
  
      def source(self):
          tools.get(**self.conan_data["sources"][self.version],
                    destination=self._source_subfolder, strip_root=True)
  
      @functools.lru_cache(1)
      def _configure_cmake(self):
          cmake = CMake(self)
          cmake.definitions["DISABLE_ASYNC_UPDATES"] = \
              self.options.disable_async_updates
          cmake.definitions["DISABLE_COPYRIGHT_MESSAGE"] = \
              self.options.disable_copyright_msg
          cmake.definitions["DISABLE_VIRTUAL_BIND"] = \
              self.options.disable_virtual_bind
          cmake.definitions["ENABLE_ASSERTIONS"] = \
              self.options.enable_assertions
          cmake.definitions["ENABLE_IMMEDIATE_SELF_NOTIFICATIONS"] = \
              self.options.enable_immediate_self_notifications
          cmake.definitions["ENABLE_PTHREADS"] = \
              self.options.get_safe("enable_pthreads", False)
          cmake.configure()
          return cmake
  
      def build(self):
          for patch in self.conan_data.get("patches", {}).get(self.version, []):
              tools.patch(**patch)
          cmake = self._configure_cmake()
          cmake.build()
  
      def package(self):
          self.copy("LICENSE", dst="licenses", src=self._source_subfolder)
          self.copy("NOTICE", dst="licenses", src=self._source_subfolder)
          cmake = self._configure_cmake()
          cmake.install()
          tools.rmdir(os.path.join(self.package_folder, "lib", "cmake"))
          tools.rmdir(os.path.join(self.package_folder, "share"))
  
      def package_info(self):
          self.cpp_info.set_property("cmake_file_name", "SystemCLanguage")
          self.cpp_info.set_property("cmake_target_name", "SystemC::systemc")
          # TODO: back to global scope in conan v2 once cmake_find_package* generators removed
          self.cpp_info.components["_systemc"].libs = ["systemc"]
          if self.settings.os in ["Linux", "FreeBSD"]:
              self.cpp_info.components["_systemc"].system_libs = ["pthread"]
          if self._is_msvc:
              self.cpp_info.components["_systemc"].cxxflags.append("/vmg")
  
          # TODO: to remove in conan v2 once cmake_find_package* generators removed
          self.cpp_info.filenames["cmake_find_package"] = "SystemCLanguage"
          self.cpp_info.filenames["cmake_find_package_multi"] = "SystemCLanguage"
          self.cpp_info.names["cmake_find_package"] = "SystemC"
          self.cpp_info.names["cmake_find_package_multi"] = "SystemC"
          self.cpp_info.components["_systemc"].names["cmake_find_package"] = "systemc"
          self.cpp_info.components["_systemc"].names["cmake_find_package_multi"] = "systemc"
          self.cpp_info.components["_systemc"].set_property("cmake_target_name", "SystemC::systemc")
  