Temporary header file '/tmp/Zd2G0Fsd9F/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

  // add includes
  #include "/usr/include/X11/fonts/FSlib.h"

  // add classes
  _FSChar2b* tmp_add_class_0;
  _FSEvent* tmp_add_class_1;
  _FSExtData* tmp_add_class_2;
  _FSExtent* tmp_add_class_3;
  _FSOffset* tmp_add_class_4;
  _FSPropInfo* tmp_add_class_5;
  _FSPropOffset* tmp_add_class_6;
  _FSQEvent* tmp_add_class_7;
  _FSRange* tmp_add_class_8;
  _FSServer* tmp_add_class_9;
  _FSXCharInfo* tmp_add_class_10;
  _FSXFontInfoHeader* tmp_add_class_11;
  _alternate* tmp_add_class_12;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/Zd2G0Fsd9F/dump1.h"