Temporary header file '/tmp/UVEJL3PqP7/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
#ifdef __cplusplus
// C17 compat layer
#define _Alignof(type) alignof(type)
#endif
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/miroil/miroil/compositor.h"
  #include "/usr/include/miroil/miroil/display_configuration_controller_wrapper.h"
  #include "/usr/include/miroil/miroil/display_configuration_policy.h"
  #include "/usr/include/miroil/miroil/display_configuration_storage.h"
  #include "/usr/include/miroil/miroil/display_id.h"
  #include "/usr/include/miroil/miroil/display_listener_wrapper.h"
  #include "/usr/include/miroil/miroil/edid.h"
  #include "/usr/include/miroil/miroil/event_builder.h"
  #include "/usr/include/miroil/miroil/eventdispatch.h"
  #include "/usr/include/miroil/miroil/input_device.h"
  #include "/usr/include/miroil/miroil/input_device_observer.h"
  #include "/usr/include/miroil/miroil/mir_prompt_session.h"
  #include "/usr/include/miroil/miroil/mir_server_hooks.h"
  #include "/usr/include/miroil/miroil/mirbuffer.h"
  #include "/usr/include/miroil/miroil/open_gl_context.h"
  #include "/usr/include/miroil/miroil/persist_display_config.h"
  #include "/usr/include/miroil/miroil/prompt_session_listener.h"
  #include "/usr/include/miroil/miroil/prompt_session_manager.h"
  #include "/usr/include/miroil/miroil/set_compositor.h"
  #include "/usr/include/miroil/miroil/surface.h"
  #include "/usr/include/miroil/miroil/surface_observer.h"

  // add namespaces
  namespace glm{typedef int tmp_add_type_1;}
  glm::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace glm{namespace detail{typedef int tmp_add_type_2;}}
  glm::detail::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace mir{typedef int tmp_add_type_3;}
  mir::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace mir{namespace compositor{typedef int tmp_add_type_4;}}
  mir::compositor::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace mir{namespace geometry{typedef int tmp_add_type_5;}}
  mir::geometry::tmp_add_type_5 tmp_add_func_5(){return 0;};
  namespace mir{namespace geometry{namespace generic{typedef int tmp_add_type_6;}}}
  mir::geometry::generic::tmp_add_type_6 tmp_add_func_6(){return 0;};
  namespace mir{namespace graphics{typedef int tmp_add_type_7;}}
  mir::graphics::tmp_add_type_7 tmp_add_func_7(){return 0;};
  namespace mir{namespace graphics{namespace detail{typedef int tmp_add_type_8;}}}
  mir::graphics::detail::tmp_add_type_8 tmp_add_func_8(){return 0;};
  namespace mir{namespace input{typedef int tmp_add_type_9;}}
  mir::input::tmp_add_type_9 tmp_add_func_9(){return 0;};
  namespace mir{namespace scene{typedef int tmp_add_type_10;}}
  mir::scene::tmp_add_type_10 tmp_add_func_10(){return 0;};
  namespace mir{namespace shell{typedef int tmp_add_type_11;}}
  mir::shell::tmp_add_type_11 tmp_add_func_11(){return 0;};
  namespace miral{typedef int tmp_add_type_12;}
  miral::tmp_add_type_12 tmp_add_func_12(){return 0;};
  namespace miral{namespace toolkit{typedef int tmp_add_type_13;}}
  miral::toolkit::tmp_add_type_13 tmp_add_func_13(){return 0;};
  namespace miroil{typedef int tmp_add_type_14;}
  miroil::tmp_add_type_14 tmp_add_func_14(){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;
  xkb_rule_names* tmp_add_class_3;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/UVEJL3PqP7/dump1.h"  -I/usr/include/mirserver -I/usr/include/mirplatform -I/usr/include/miroil -I/usr/include/mircore -I/usr/include/miral