Temporary header file '/tmp/xXHm3CzP4T/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/X11/Xtrans/Xtrans.h"
  #include "/usr/include/X11/Xtrans/Xtransint.h"

  // add classes
  _XtransConnInfo* tmp_add_class_0;
  _Xtransport* tmp_add_class_1;
  _Xtransport_table* tmp_add_class_2;
  cmsghdr* tmp_add_class_3;
  f_owner_ex* tmp_add_class_4;
  file_handle* tmp_add_class_5;
  flock64* tmp_add_class_6;
  group_filter* tmp_add_class_7;
  group_req* tmp_add_class_8;
  group_source_req* tmp_add_class_9;
  in6_addr* tmp_add_class_10;
  in6_pktinfo* tmp_add_class_11;
  in_addr* tmp_add_class_12;
  in_pktinfo* tmp_add_class_13;
  iovec* tmp_add_class_14;
  ip6_mtuinfo* tmp_add_class_15;
  ip_mreq* tmp_add_class_16;
  ip_mreq_source* tmp_add_class_17;
  ip_mreqn* tmp_add_class_18;
  ip_msfilter* tmp_add_class_19;
  ip_opts* tmp_add_class_20;
  ipv6_mreq* tmp_add_class_21;
  itimerval* tmp_add_class_22;
  linger* tmp_add_class_23;
  mmsghdr* tmp_add_class_24;
  msghdr* tmp_add_class_25;
  osockaddr* tmp_add_class_26;
  sockaddr* tmp_add_class_27;
  sockaddr_in* tmp_add_class_28;
  sockaddr_in6* tmp_add_class_29;
  sockaddr_storage* tmp_add_class_30;
  ucred* tmp_add_class_31;
  utsname* tmp_add_class_32;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/xXHm3CzP4T/dump1.h"