Temporary header file '/tmp/kb1sc0jjG2/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/c++/12/cstdint"
  #include "/usr/include/firebird/Interface.h"
  #include "/usr/include/firebird/IdlFbInterfaces.h"
  #include "/usr/include/firebird/Message.h"
  #include "/usr/include/ib_util.h"
  #include "/usr/include/ibase.h"
  #include "/usr/include/iberror.h"

  // add namespaces
  namespace Firebird{typedef int tmp_add_type_1;}
  Firebird::tmp_add_type_1 tmp_add_func_1(){return 0;};

  // add classes
  GDS_QUAD_t* tmp_add_class_0;
  blobcallback* tmp_add_class_1;
  bstream* tmp_add_class_2;
  isc_blob_ctl* tmp_add_class_3;
  paramdsc* tmp_add_class_4;
  paramvary* tmp_add_class_5;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/kb1sc0jjG2/dump1.h"