Temporary header file '/tmp/QJ9SUksjhQ/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/mirrenderer/mir/renderer/gl/basic_buffer_render_target.h"
  #include "/usr/include/mirrenderer/mir/renderer/gl/buffer_render_target.h"
  #include "/usr/include/mirrenderer/mir/renderer/gl/context.h"
  #include "/usr/include/mirrenderer/mir/renderer/gl/context_source.h"
  #include "/usr/include/mirrenderer/mir/renderer/gl/render_target.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 renderer{typedef int tmp_add_type_2;}}
  mir::renderer::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace mir{namespace renderer{namespace gl{typedef int tmp_add_type_3;}}}
  mir::renderer::gl::tmp_add_type_3 tmp_add_func_3(){return 0;};

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/QJ9SUksjhQ/dump1.h"

In file included from /usr/include/mirrenderer/mir/renderer/gl/basic_buffer_render_target.h:20,
                 from /tmp/QJ9SUksjhQ/dump1.h:12:
/usr/include/mirrenderer/mir/renderer/gl/buffer_render_target.h:21:10: fatal error: mir/geometry/size.h: No such file or directory
   21 | #include "mir/geometry/size.h"
      |          ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.