Temporary header file '/tmp/uxQ2wlGft2/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
#ifdef __cplusplus
// C17 compat layer
#define _Alignof(type) alignof(type)
#endif
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/stdint.h"
  #include "/usr/include/libiberty/ansidecl.h"
  #include "/usr/include/libiberty/demangle.h"
  #include "/usr/include/libiberty/dyn-string.h"
  #include "/usr/include/libiberty/fibheap.h"
  #include "/usr/include/libiberty/floatformat.h"
  #include "/usr/include/libiberty/hashtab.h"
  #include "/usr/include/libiberty/libiberty.h"
  #include "/usr/include/libiberty/objalloc.h"
  #include "/usr/include/libiberty/partition.h"
  #include "/usr/include/libiberty/safe-ctype.h"
  #include "/usr/include/libiberty/sort.h"
  #include "/usr/include/libiberty/splay-tree.h"
  #include "/usr/include/libiberty/timeval-utils.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;
  demangle_component* tmp_add_class_3;
  demangler_engine* tmp_add_class_4;
  dyn_string* tmp_add_class_5;
  fibheap* tmp_add_class_6;
  fibnode* tmp_add_class_7;
  floatformat* tmp_add_class_8;
  htab* tmp_add_class_9;
  objalloc* tmp_add_class_10;
  objalloc_align* tmp_add_class_11;
  partition_def* tmp_add_class_12;
  partition_elem* tmp_add_class_13;
  pex_time* tmp_add_class_14;
  splay_tree_node_s* tmp_add_class_15;
  splay_tree_s* tmp_add_class_16;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/uxQ2wlGft2/dump1.h"