Temporary header file '/tmp/5khK1pqZVB/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
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/VecGeom/gdml/Auxiliary.h"
  #include "/usr/include/VecGeom/gdml/Backend.h"
  #include "/usr/include/VecGeom/gdml/Frontend.h"
  #include "/usr/include/VecGeom/gdml/Helper.h"
  #include "/usr/include/VecGeom/gdml/MaterialInfo.h"
  #include "/usr/include/VecGeom/gdml/Middleware.h"
  #include "/usr/include/VecGeom/gdml/ReflFactory.h"
  #include "/usr/include/VecGeom/gdml/RegionInfo.h"

  // add namespaces
  namespace vecCore{typedef int tmp_add_type_1;}
  vecCore::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace vecCore{namespace backend{typedef int tmp_add_type_2;}}
  vecCore::backend::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace vecCore{namespace math{typedef int tmp_add_type_3;}}
  vecCore::math::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace vecgeom{typedef int tmp_add_type_4;}
  vecgeom::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace vecgeom{namespace cuda{typedef int tmp_add_type_5;}}
  vecgeom::cuda::tmp_add_type_5 tmp_add_func_5(){return 0;};
  namespace vecgeom{namespace cxx{typedef int tmp_add_type_6;}}
  vecgeom::cxx::tmp_add_type_6 tmp_add_func_6(){return 0;};
  namespace vecgeom{namespace cxx{namespace details{typedef int tmp_add_type_7;}}}
  vecgeom::cxx::details::tmp_add_type_7 tmp_add_func_7(){return 0;};
  namespace vecgeom{namespace cxx{namespace EInside{typedef int tmp_add_type_8;}}}
  vecgeom::cxx::EInside::tmp_add_type_8 tmp_add_func_8(){return 0;};
  namespace vecgeom{namespace cxx{namespace Utils3D{typedef int tmp_add_type_9;}}}
  vecgeom::cxx::Utils3D::tmp_add_type_9 tmp_add_func_9(){return 0;};
  namespace vecgeom{namespace rotation{typedef int tmp_add_type_10;}}
  vecgeom::rotation::tmp_add_type_10 tmp_add_func_10(){return 0;};
  namespace vecgeom{namespace translation{typedef int tmp_add_type_11;}}
  vecgeom::translation::tmp_add_type_11 tmp_add_func_11(){return 0;};
  namespace vgdml{typedef int tmp_add_type_12;}
  vgdml::tmp_add_type_12 tmp_add_func_12(){return 0;};
  namespace vgdml{namespace Frontend{typedef int tmp_add_type_13;}}
  vgdml::Frontend::tmp_add_type_13 tmp_add_func_13(){return 0;};
  namespace vgdml{namespace Helper{typedef int tmp_add_type_14;}}
  vgdml::Helper::tmp_add_type_14 tmp_add_func_14(){return 0;};
  namespace vecgeom{namespace cxx{namespace __anon4a9b7ebf5b11{typedef int tmp_add_type_15;}}}
  vecgeom::cxx::__anon4a9b7ebf5b11::tmp_add_type_15 tmp_add_func_15(){return 0;};
  namespace xercesc_3_2{typedef int tmp_add_type_16;}
  xercesc_3_2::tmp_add_type_16 tmp_add_func_16(){return 0;};

  // 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;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/5khK1pqZVB/dump1.h"