docs: def _make_dep_lib_file_sym_links_and_copy_include_files(self):
          """Make symbolick links for lib files and copy include files.
  
          Do below steps for a dependency packages.
  
          Dependency packages
          - popt-devel
  
          Steps
          1. Make symbolic links from system library files or downloaded lib
             files to downloaded source library files.
          2. Copy include header files to include directory.
          """
          if not self._rpm_py_has_popt_devel_dep():
              message = (
                  'The RPM Python binding does not have popt-devel dependency'
              )
              Log.debug(message)
              return
          if self._is_popt_devel_installed():
              message = '{0} package is installed.'.format(
                  self.pacakge_popt_devel_name)
              Log.debug(message)
              return
          if not self._is_package_downloadable():
              message = '''
  Install a {0} download plugin or
  install the {0} pacakge [{1}].
  '''.format(self.package_sys_name, self.pacakge_popt_devel_name)
              raise InstallError(message)
          if not self._is_popt_installed():
              message = '''
  Required {0} not installed: [{1}],
  Install the {0} package.
  '''.format(self.package_sys_name, self.pacakge_popt_name)
              raise InstallError(message)
  
          self._download_and_extract_popt_devel()
  
          # Copy libpopt.so to rpm_root/lib/.libs/.
          popt_lib_dirs = [
              self.rpm.lib_dir,
              # /lib64/libpopt.so* installed at popt-1.13-7.el6.x86_64.
              '/lib64',
              # /lib/*/libpopt.so* installed at libpopt0-1.16-8ubuntu1
              '/lib',
          ]
          pattern = 'libpopt.so*'
          popt_so_file = None
          for popt_lib_dir in popt_lib_dirs:
              so_files = Cmd.find(popt_lib_dir, pattern)
              if so_files:
                  popt_so_file = so_files[0]
                  break
  
          if not popt_so_file:
              message = 'so file pattern {0} not found at {1}'.format(
                  pattern, str(popt_lib_dirs)
              )
              raise InstallError(message)
  
          cmd = 'ln -sf {0} ../lib/.libs/libpopt.so'.format(
                 popt_so_file)
          Cmd.sh_e(cmd)
  
          # Copy popt.h to rpm_root/include
          shutil.copy('./usr/include/popt.h', '../include')