Temporary header file '/tmp/i7UR8hBy6E/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/mircore/mir/abnormal_exit.h"
  #include "/usr/include/mircore/mir/anonymous_shm_file.h"
  #include "/usr/include/mircore/mir/depth_layer.h"
  #include "/usr/include/mircore/mir/fatal.h"
  #include "/usr/include/mircore/mir/fd.h"
  #include "/usr/include/mircore/mir/geometry/dimensions.h"
  #include "/usr/include/mircore/mir/geometry/displacement.h"
  #include "/usr/include/mircore/mir/geometry/forward.h"
  #include "/usr/include/mircore/mir/geometry/point.h"
  #include "/usr/include/mircore/mir/geometry/rectangle.h"
  #include "/usr/include/mircore/mir/geometry/rectangles.h"
  #include "/usr/include/mircore/mir/geometry/size.h"
  #include "/usr/include/mircore/mir/int_wrapper.h"
  #include "/usr/include/mircore/mir/optional_value.h"
  #include "/usr/include/mircore/mir/proof_of_mutex_lock.h"
  #include "/usr/include/mircore/mir/shm_file.h"
  #include "/usr/include/mircore/mir/synchronised.h"
  #include "/usr/include/mircore/mir_toolkit/common.h"
  #include "/usr/include/mircore/mir_toolkit/events/enums.h"
  #include "/usr/include/mircore/mir_toolkit/mir_input_device_types.h"
  #include "/usr/include/mircore/mir_toolkit/mir_native_buffer.h"
  #include "/usr/include/mircore/mir_toolkit/mir_version_number.h"

  // add namespaces
  namespace mir{typedef int tmp_add_type_1;}
  mir::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace mir{namespace detail{typedef int tmp_add_type_2;}}
  mir::detail::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace mir{namespace geometry{typedef int tmp_add_type_3;}}
  mir::geometry::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace mir{namespace geometry{namespace generic{typedef int tmp_add_type_4;}}}
  mir::geometry::generic::tmp_add_type_4 tmp_add_func_4(){return 0;};

  // add classes
  MirBufferPackage* tmp_add_class_0;
  _G_fpos64_t* tmp_add_class_1;
  _G_fpos_t* tmp_add_class_2;
  _IO_cookie_io_functions_t* tmp_add_class_3;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/i7UR8hBy6E/dump1.h"  -I/usr/include/mircore