Temporary header file '/tmp/fD_FBXhuca/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/stdlib.h"
  #include "/usr/include/ghostscript/gdevdsp.h"
  #include "/usr/include/ghostscript/gserrors.h"
  #include "/usr/include/ghostscript/iapi.h"
  #include "/usr/include/ghostscript/ierrors.h"

  // add classes
  display_callback_s* tmp_add_class_0;
  display_callback_v1_s* tmp_add_class_1;
  display_callback_v2_s* tmp_add_class_2;
  gsapi_revision_s* tmp_add_class_3;

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