Temporary header file '/tmp/8Dw4NuEl_k/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _FILE_OFFSET_BITS 64
#define _GXX_NULLPTR_T
#define CLUTTER_ENABLE_COMPOSITOR_API 1
#define _REGEX_NELTS(n)
#define _Atomic
#define PACKED
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/tkrzw_cmd_util.h"
  #include "/usr/include/tkrzw_compress.h"
  #include "/usr/include/tkrzw_containers.h"
  #include "/usr/include/tkrzw_dbm.h"
  #include "/usr/include/tkrzw_dbm_async.h"
  #include "/usr/include/tkrzw_dbm_baby.h"
  #include "/usr/include/tkrzw_dbm_cache.h"
  #include "/usr/include/tkrzw_dbm_common_impl.h"
  #include "/usr/include/tkrzw_dbm_hash.h"
  #include "/usr/include/tkrzw_dbm_hash_impl.h"
  #include "/usr/include/tkrzw_dbm_poly.h"
  #include "/usr/include/tkrzw_dbm_shard.h"
  #include "/usr/include/tkrzw_dbm_skip.h"
  #include "/usr/include/tkrzw_dbm_skip_impl.h"
  #include "/usr/include/tkrzw_dbm_std.h"
  #include "/usr/include/tkrzw_dbm_tiny.h"
  #include "/usr/include/tkrzw_dbm_tree.h"
  #include "/usr/include/tkrzw_dbm_tree_impl.h"
  #include "/usr/include/tkrzw_dbm_ulog.h"
  #include "/usr/include/tkrzw_file.h"
  #include "/usr/include/tkrzw_file_mmap.h"
  #include "/usr/include/tkrzw_file_poly.h"
  #include "/usr/include/tkrzw_file_pos.h"
  #include "/usr/include/tkrzw_file_std.h"
  #include "/usr/include/tkrzw_file_util.h"
  #include "/usr/include/tkrzw_hash_util.h"
  #include "/usr/include/tkrzw_index.h"
  #include "/usr/include/tkrzw_key_comparators.h"
  #include "/usr/include/tkrzw_langc.h"
  #include "/usr/include/tkrzw_lib_common.h"
  #include "/usr/include/tkrzw_logger.h"
  #include "/usr/include/tkrzw_message_queue.h"
  #include "/usr/include/tkrzw_str_util.h"
  #include "/usr/include/tkrzw_thread_util.h"
  #include "/usr/include/tkrzw_time_util.h"

  // add namespaces
  namespace tkrzw{typedef int tmp_add_type_1;}
  tkrzw::tmp_add_type_1 tmp_add_func_1(){return 0;};

  // add classes
  _G_fpos64_t* tmp_add_class_0;
  _G_fpos_t* tmp_add_class_1;
  _IO_cookie_io_functions_t* tmp_add_class_2;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/8Dw4NuEl_k/dump1.h"