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

  // add includes
  #include "/usr/include/netax25/ax25.h"
  #include "/usr/include/netax25/ax25io.h"
  #include "/usr/include/netax25/axconfig.h"
  #include "/usr/include/netax25/axlib.h"
  #include "/usr/include/netax25/daemon.h"
  #include "/usr/include/netax25/mheard.h"
  #include "/usr/include/netax25/nrconfig.h"
  #include "/usr/include/netax25/procutils.h"
  #include "/usr/include/netax25/rsconfig.h"
  #include "/usr/include/netax25/ttyutils.h"

  // add classes
  ax25_bpqaddr_struct* tmp_add_class_0;
  ax25_ctl_struct* tmp_add_class_1;
  ax25_fwd_struct* tmp_add_class_2;
  ax25_info_struct* tmp_add_class_3;
  ax25_parms_struct* tmp_add_class_4;
  ax25_route_opt_struct* tmp_add_class_5;
  ax25_routes_struct* tmp_add_class_6;
  ax25io_s* tmp_add_class_7;
  cmsghdr* tmp_add_class_8;
  full_sockaddr_ax25* tmp_add_class_9;
  full_sockaddr_rose* tmp_add_class_10;
  iovec* tmp_add_class_11;
  linger* tmp_add_class_12;
  mheard_struct* tmp_add_class_13;
  mmsghdr* tmp_add_class_14;
  msghdr* tmp_add_class_15;
  osockaddr* tmp_add_class_16;
  proc_ax25* tmp_add_class_17;
  proc_ax25_route* tmp_add_class_18;
  proc_nr* tmp_add_class_19;
  proc_nr_neigh* tmp_add_class_20;
  proc_nr_nodes* tmp_add_class_21;
  proc_rs* tmp_add_class_22;
  proc_rs_neigh* tmp_add_class_23;
  proc_rs_nodes* tmp_add_class_24;
  proc_rs_route* tmp_add_class_25;
  rose_cause_struct* tmp_add_class_26;
  rose_facilities_struct* tmp_add_class_27;
  rose_route_struct* tmp_add_class_28;
  sockaddr* tmp_add_class_29;
  sockaddr_ax25* tmp_add_class_30;
  sockaddr_rose* tmp_add_class_31;
  sockaddr_storage* tmp_add_class_32;
  ucred* tmp_add_class_33;

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