Temporary header file '/tmp/njUIHsAPVG/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/gphoto2/gphoto2-abilities-list.h"
  #include "/usr/include/gphoto2/gphoto2-camera.h"
  #include "/usr/include/gphoto2/gphoto2-context.h"
  #include "/usr/include/gphoto2/gphoto2-file.h"
  #include "/usr/include/gphoto2/gphoto2-filesys.h"
  #include "/usr/include/gphoto2/gphoto2-library.h"
  #include "/usr/include/gphoto2/gphoto2-list.h"
  #include "/usr/include/gphoto2/gphoto2-port-info-list.h"
  #include "/usr/include/gphoto2/gphoto2-port-log.h"
  #include "/usr/include/gphoto2/gphoto2-port-portability.h"
  #include "/usr/include/gphoto2/gphoto2-port-result.h"
  #include "/usr/include/gphoto2/gphoto2-port-version.h"
  #include "/usr/include/gphoto2/gphoto2-port.h"
  #include "/usr/include/gphoto2/gphoto2-result.h"
  #include "/usr/include/gphoto2/gphoto2-setting.h"
  #include "/usr/include/gphoto2/gphoto2-version.h"
  #include "/usr/include/gphoto2/gphoto2-widget.h"
  #include "/usr/include/gphoto2/gphoto2.h"

  // add classes
  _Camera* tmp_add_class_0;
  _CameraFileHandler* tmp_add_class_1;
  _CameraFileInfo* tmp_add_class_2;
  _CameraFileInfoAudio* tmp_add_class_3;
  _CameraFileInfoFile* tmp_add_class_4;
  _CameraFileInfoPreview* tmp_add_class_5;
  _CameraFilesystemFuncs* tmp_add_class_6;
  _CameraFunctions* tmp_add_class_7;
  _CameraStorageInformation* tmp_add_class_8;
  _GPPort* tmp_add_class_9;
  _GPPortSettings* tmp_add_class_10;
  _GPPortSettingsSerial* tmp_add_class_11;
  _GPPortSettingsUSB* tmp_add_class_12;
  _GPPortSettingsUsbDiskDirect* tmp_add_class_13;
  _GPPortSettingsUsbScsi* tmp_add_class_14;

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