Temporary header file '/tmp/fSndptk0nW/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/coin/VolVolume.hpp"

  // add classes
  VOL_alpha_factor* tmp_add_class_0;
  VOL_dual* tmp_add_class_1;
  VOL_dvector* tmp_add_class_2;
  VOL_indc* tmp_add_class_3;
  VOL_ivector* tmp_add_class_4;
  VOL_parms* tmp_add_class_5;
  VOL_primal* tmp_add_class_6;
  VOL_problem* tmp_add_class_7;
  VOL_swing* tmp_add_class_8;
  VOL_user_hooks* tmp_add_class_9;
  VOL_vh* tmp_add_class_10;
  _G_fpos64_t* tmp_add_class_11;
  _G_fpos_t* tmp_add_class_12;
  _IO_cookie_io_functions_t* tmp_add_class_13;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/fSndptk0nW/dump1.h"