Temporary header file '/tmp/h4qwgQ6fdl/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
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/virtualpg.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;
  virtualPQstruct* tmp_add_class_7;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/h4qwgQ6fdl/dump1.h"  -I/usr/include/postgresql

In file included from /tmp/h4qwgQ6fdl/dump1.h:12:
/usr/include/virtualpg.h:156:53: error: ‘sqlite3’ was not declared in this scope
  156 |     VIRTUALPG_DECLARE int virtualpg_extension_init (sqlite3 * db_handle,
      |                                                     ^~~~~~~
/usr/include/virtualpg.h:156:63: error: ‘db_handle’ was not declared in this scope
  156 |     VIRTUALPG_DECLARE int virtualpg_extension_init (sqlite3 * db_handle,
      |                                                               ^~~~~~~~~
/usr/include/virtualpg.h:157:66: error: expected primary-expression before ‘virtual_api’
  157 |                                                     virtualPQptr virtual_api);
      |                                                                  ^~~~~~~~~~~