Temporary header file '/tmp/8xcVLJ8E2O/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/tidy/buffio.h"
  #include "/usr/include/tidy/platform.h"
  #include "/usr/include/tidy/tidy.h"
  #include "/usr/include/tidy/tidybuffio.h"
  #include "/usr/include/tidy/tidyenum.h"
  #include "/usr/include/tidy/tidyplatform.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;
  _TidyAllocator* tmp_add_class_3;
  _TidyAllocatorVtbl* tmp_add_class_4;
  _TidyAttr* tmp_add_class_5;
  _TidyBuffer* tmp_add_class_6;
  _TidyDoc* tmp_add_class_7;
  _TidyInputSource* tmp_add_class_8;
  _TidyIterator* tmp_add_class_9;
  _TidyMessage* tmp_add_class_10;
  _TidyMessageArgument* tmp_add_class_11;
  _TidyNode* tmp_add_class_12;
  _TidyOption* tmp_add_class_13;
  _TidyOutputSink* tmp_add_class_14;
  _tidyLocaleMapItem* tmp_add_class_15;
  statx_timestamp* tmp_add_class_16;
  utimbuf* tmp_add_class_17;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/8xcVLJ8E2O/dump1.h"