Temporary header file '/tmp/aGVQPTbfPn/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#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/core/posix/child_process.h"
  #include "/usr/include/core/posix/exec.h"
  #include "/usr/include/core/posix/exit.h"
  #include "/usr/include/core/posix/fork.h"
  #include "/usr/include/core/posix/process.h"
  #include "/usr/include/core/posix/process_group.h"
  #include "/usr/include/core/posix/signal.h"
  #include "/usr/include/core/posix/signalable.h"
  #include "/usr/include/core/posix/standard_stream.h"
  #include "/usr/include/core/posix/this_process.h"
  #include "/usr/include/core/posix/visibility.h"
  #include "/usr/include/core/posix/wait.h"
  #include "/usr/include/core/testing/cross_process_sync.h"
  #include "/usr/include/core/testing/fork_and_run.h"

  // add namespaces
  namespace core{typedef int tmp_add_type_1;}
  core::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace core{namespace posix{typedef int tmp_add_type_2;}}
  core::posix::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace core{namespace posix{namespace exit{typedef int tmp_add_type_3;}}}
  core::posix::exit::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace core{namespace posix{namespace wait{typedef int tmp_add_type_4;}}}
  core::posix::wait::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace core{namespace testing{typedef int tmp_add_type_5;}}
  core::testing::tmp_add_type_5 tmp_add_func_5(){return 0;};
  namespace core{namespace posix{namespace this_process{typedef int tmp_add_type_6;}}}
  core::posix::this_process::tmp_add_type_6 tmp_add_func_6(){return 0;};
  namespace core{namespace posix{namespace this_process{namespace env{typedef int tmp_add_type_7;}}}}
  core::posix::this_process::env::tmp_add_type_7 tmp_add_func_7(){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;
  ucontext_t* tmp_add_class_3;

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