Temporary header file '/tmp/7GHXSnhCgK/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#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/hoel-cfg.h"
  #include "/usr/include/hoel.h"

  // 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;
  _h_connection* tmp_add_class_3;
  _h_data* tmp_add_class_4;
  _h_result* tmp_add_class_5;
  _h_type_blob* tmp_add_class_6;
  _h_type_datetime* tmp_add_class_7;
  _h_type_double* tmp_add_class_8;
  _h_type_int* tmp_add_class_9;
  _h_type_text* tmp_add_class_10;
  _o_datum* tmp_add_class_11;
  _pointer_list* tmp_add_class_12;
  json_error_t* tmp_add_class_13;
  json_t* tmp_add_class_14;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/7GHXSnhCgK/dump1.h"