Temporary header file '/tmp/yTyVUpYI65/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
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/jxl/butteraugli.h"
  #include "/usr/include/jxl/cms_interface.h"
  #include "/usr/include/jxl/codestream_header.h"
  #include "/usr/include/jxl/color_encoding.h"
  #include "/usr/include/jxl/decode.h"
  #include "/usr/include/jxl/encode.h"
  #include "/usr/include/jxl/jxl_export.h"
  #include "/usr/include/jxl/jxl_threads_export.h"
  #include "/usr/include/jxl/memory_manager.h"
  #include "/usr/include/jxl/parallel_runner.h"
  #include "/usr/include/jxl/resizable_parallel_runner.h"
  #include "/usr/include/jxl/resizable_parallel_runner_cxx.h"
  #include "/usr/include/jxl/thread_parallel_runner.h"
  #include "/usr/include/jxl/thread_parallel_runner_cxx.h"
  #include "/usr/include/jxl/types.h"
  #include "/usr/include/jxl/version.h"

  // add classes
  JxlMemoryManagerStruct* tmp_add_class_0;
  JxlResizableParallelRunnerDestroyStruct* tmp_add_class_1;
  JxlThreadParallelRunnerDestroyStruct* tmp_add_class_2;
  _G_fpos64_t* tmp_add_class_3;
  _G_fpos_t* tmp_add_class_4;
  _IO_cookie_io_functions_t* tmp_add_class_5;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/yTyVUpYI65/dump1.h"