Temporary header file '/tmp/n6DSB7Hq3J/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

  // add includes
  #include "/usr/include/postgresql/ecpg_config.h"
  #include "/usr/include/postgresql/ecpg_informix.h"
  #include "/usr/include/postgresql/ecpgerrno.h"
  #include "/usr/include/postgresql/ecpglib.h"
  #include "/usr/include/postgresql/ecpgtype.h"
  #include "/usr/include/postgresql/informix/esql/datetime.h"
  #include "/usr/include/postgresql/informix/esql/decimal.h"
  #include "/usr/include/postgresql/informix/esql/sqltypes.h"
  #include "/usr/include/postgresql/pgtypes.h"
  #include "/usr/include/postgresql/pgtypes_date.h"
  #include "/usr/include/postgresql/pgtypes_error.h"
  #include "/usr/include/postgresql/pgtypes_interval.h"
  #include "/usr/include/postgresql/pgtypes_numeric.h"
  #include "/usr/include/postgresql/pgtypes_timestamp.h"
  #include "/usr/include/postgresql/sql3types.h"
  #include "/usr/include/postgresql/sqlca.h"
  #include "/usr/include/postgresql/sqlda-compat.h"
  #include "/usr/include/postgresql/sqlda-native.h"
  #include "/usr/include/postgresql/sqlda.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;
  _PQconninfoOption* tmp_add_class_3;
  _PQprintOpt* tmp_add_class_4;
  pgNotify* tmp_add_class_5;
  pgresAttDesc* tmp_add_class_6;
  sqlca_t* tmp_add_class_7;
  sqlda_compat* tmp_add_class_8;
  sqlda_struct* tmp_add_class_9;
  sqlname* tmp_add_class_10;
  sqlvar_compat* tmp_add_class_11;
  sqlvar_struct* tmp_add_class_12;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/n6DSB7Hq3J/dump1.h"  -I/usr/include/postgresql