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

  // add defines
  #define __STDC_VERSION__ 201710L
#define _TIME_BITS 64
#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/guestfs.h"

  // add classes
  guestfs_application* tmp_add_class_0;
  guestfs_application2* tmp_add_class_1;
  guestfs_application2_list* tmp_add_class_2;
  guestfs_application_list* tmp_add_class_3;
  guestfs_btrfsbalance* tmp_add_class_4;
  guestfs_btrfsbalance_list* tmp_add_class_5;
  guestfs_btrfsqgroup* tmp_add_class_6;
  guestfs_btrfsqgroup_list* tmp_add_class_7;
  guestfs_btrfsscrub* tmp_add_class_8;
  guestfs_btrfsscrub_list* tmp_add_class_9;
  guestfs_btrfssubvolume* tmp_add_class_10;
  guestfs_btrfssubvolume_list* tmp_add_class_11;
  guestfs_dirent* tmp_add_class_12;
  guestfs_dirent_list* tmp_add_class_13;
  guestfs_hivex_node* tmp_add_class_14;
  guestfs_hivex_node_list* tmp_add_class_15;
  guestfs_hivex_value* tmp_add_class_16;
  guestfs_hivex_value_list* tmp_add_class_17;
  guestfs_inotify_event* tmp_add_class_18;
  guestfs_inotify_event_list* tmp_add_class_19;
  guestfs_int_bool* tmp_add_class_20;
  guestfs_int_bool_list* tmp_add_class_21;
  guestfs_isoinfo_list* tmp_add_class_22;
  guestfs_lvm_lv* tmp_add_class_23;
  guestfs_lvm_lv_list* tmp_add_class_24;
  guestfs_lvm_pv* tmp_add_class_25;
  guestfs_lvm_pv_list* tmp_add_class_26;
  guestfs_lvm_vg* tmp_add_class_27;
  guestfs_lvm_vg_list* tmp_add_class_28;
  guestfs_mdstat* tmp_add_class_29;
  guestfs_mdstat_list* tmp_add_class_30;
  guestfs_partition* tmp_add_class_31;
  guestfs_partition_list* tmp_add_class_32;
  guestfs_stat_list* tmp_add_class_33;
  guestfs_statns_list* tmp_add_class_34;
  guestfs_statvfs_list* tmp_add_class_35;
  guestfs_tsk_dirent* tmp_add_class_36;
  guestfs_tsk_dirent_list* tmp_add_class_37;
  guestfs_utsname_list* tmp_add_class_38;
  guestfs_version_list* tmp_add_class_39;
  guestfs_xattr* tmp_add_class_40;
  guestfs_xattr_list* tmp_add_class_41;
  guestfs_xfsinfo* tmp_add_class_42;
  guestfs_xfsinfo_list* tmp_add_class_43;
  guestfs_yara_detection* tmp_add_class_44;
  guestfs_yara_detection_list* tmp_add_class_45;

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