Temporary header file '/tmp/akGrlsnWbm/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

  // add includes
  #include "/usr/include/openjpeg-2.5/openjpeg.h"
  #include "/usr/include/openjpeg-2.5/opj_config.h"
  #include "/usr/include/openjpeg-2.5/opj_stdint.h"

  // 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;
  opj_codestream_index* tmp_add_class_3;
  opj_codestream_info* tmp_add_class_4;
  opj_codestream_info_v2* tmp_add_class_5;
  opj_cparameters* tmp_add_class_6;
  opj_dparameters* tmp_add_class_7;
  opj_image* tmp_add_class_8;
  opj_image_comp* tmp_add_class_9;
  opj_image_comptparm* tmp_add_class_10;
  opj_jp2_index* tmp_add_class_11;
  opj_jp2_metadata* tmp_add_class_12;
  opj_marker_info* tmp_add_class_13;
  opj_packet_info* tmp_add_class_14;
  opj_poc* tmp_add_class_15;
  opj_tccp_info* tmp_add_class_16;
  opj_tile_index* tmp_add_class_17;
  opj_tile_info* tmp_add_class_18;
  opj_tile_v2_info* tmp_add_class_19;
  opj_tp_index* tmp_add_class_20;
  opj_tp_info* tmp_add_class_21;

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