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

  // add includes
  #include "/usr/include/sisl-copyright.h"
  #include "/usr/include/sisl.h"
  #include "/usr/include/sislP.h"

  // add classes
  SISLCurve* tmp_add_class_0;
  SISLEdge* tmp_add_class_1;
  SISLIntcurve* tmp_add_class_2;
  SISLIntdat* tmp_add_class_3;
  SISLIntlist* tmp_add_class_4;
  SISLIntpt* tmp_add_class_5;
  SISLIntsurf* tmp_add_class_6;
  SISLObject* tmp_add_class_7;
  SISLPoint* tmp_add_class_8;
  SISLPtedge* tmp_add_class_9;
  SISLSurf* tmp_add_class_10;
  SISLTrack* tmp_add_class_11;
  SISLTrimpar* tmp_add_class_12;
  SISLbox* tmp_add_class_13;
  SISLdir* tmp_add_class_14;
  _G_fpos64_t* tmp_add_class_15;
  _G_fpos_t* tmp_add_class_16;
  _IO_cookie_io_functions_t* tmp_add_class_17;
  rank_info* tmp_add_class_18;

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