Temporary header file '/tmp/3Nhwgkybkk/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

  // add includes
  #include "/usr/include/gc/cord.h"
  #include "/usr/include/gc/cord_pos.h"
  #include "/usr/include/gc/ec.h"
  #include "/usr/include/gc/gc.h"
  #include "/usr/include/gc/gc_allocator.h"
  #include "/usr/include/gc/gc_backptr.h"
  #include "/usr/include/gc/gc_config_macros.h"
  #include "/usr/include/gc/gc_cpp.h"
  #include "/usr/include/gc/gc_disclaim.h"
  #include "/usr/include/gc/gc_gcj.h"
  #include "/usr/include/gc/gc_inline.h"
  #include "/usr/include/gc/gc_mark.h"
  #include "/usr/include/gc/gc_pthread_redirects.h"
  #include "/usr/include/gc/gc_tiny_fl.h"
  #include "/usr/include/gc/gc_typed.h"
  #include "/usr/include/gc/gc_version.h"
  #include "/usr/include/gc/javaxfc.h"
  #include "/usr/include/gc/leak_detector.h"
  #include "/usr/include/gc.h"
  #include "/usr/include/gc_cpp.h"

  // add classes
  CORD_Pos* tmp_add_class_0;
  CORD_ec_struct* tmp_add_class_1;
  CORD_pe* tmp_add_class_2;
  GC_false_type* tmp_add_class_3;
  GC_finalizer_closure* tmp_add_class_4;
  GC_ms_entry* tmp_add_class_5;
  GC_prof_stats_s* tmp_add_class_6;
  GC_stack_base* tmp_add_class_7;
  GC_timeval_s* tmp_add_class_8;
  GC_true_type* tmp_add_class_9;
  _G_fpos64_t* tmp_add_class_10;
  _G_fpos_t* tmp_add_class_11;
  _IO_cookie_io_functions_t* tmp_add_class_12;
  gc* tmp_add_class_13;
  gc_cleanup* tmp_add_class_14;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/3Nhwgkybkk/dump1.h"