Temporary header file '/tmp/zLowTTWeoU/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
#ifdef __cplusplus
// C17 compat layer
#define _Alignof(type) alignof(type)
#endif
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/exiv2/basicio.hpp"
  #include "/usr/include/exiv2/bmffimage.hpp"
  #include "/usr/include/exiv2/bmpimage.hpp"
  #include "/usr/include/exiv2/config.h"
  #include "/usr/include/exiv2/convert.hpp"
  #include "/usr/include/exiv2/cr2image.hpp"
  #include "/usr/include/exiv2/crwimage.hpp"
  #include "/usr/include/exiv2/datasets.hpp"
  #include "/usr/include/exiv2/easyaccess.hpp"
  #include "/usr/include/exiv2/epsimage.hpp"
  #include "/usr/include/exiv2/error.hpp"
  #include "/usr/include/exiv2/exif.hpp"
  #include "/usr/include/exiv2/exiv2.hpp"
  #include "/usr/include/exiv2/exiv2lib_export.h"
  #include "/usr/include/exiv2/exv_conf.h"
  #include "/usr/include/exiv2/futils.hpp"
  #include "/usr/include/exiv2/gifimage.hpp"
  #include "/usr/include/exiv2/http.hpp"
  #include "/usr/include/exiv2/image.hpp"
  #include "/usr/include/exiv2/ini.hpp"
  #include "/usr/include/exiv2/iptc.hpp"
  #include "/usr/include/exiv2/jp2image.hpp"
  #include "/usr/include/exiv2/jpgimage.hpp"
  #include "/usr/include/exiv2/matroskavideo.hpp"
  #include "/usr/include/exiv2/metadatum.hpp"
  #include "/usr/include/exiv2/mrwimage.hpp"
  #include "/usr/include/exiv2/orfimage.hpp"
  #include "/usr/include/exiv2/pgfimage.hpp"
  #include "/usr/include/exiv2/pngimage.hpp"
  #include "/usr/include/exiv2/preview.hpp"
  #include "/usr/include/exiv2/properties.hpp"
  #include "/usr/include/exiv2/psdimage.hpp"
  #include "/usr/include/exiv2/quicktimevideo.hpp"
  #include "/usr/include/exiv2/rafimage.hpp"
  #include "/usr/include/exiv2/riffvideo.hpp"
  #include "/usr/include/exiv2/rw2image.hpp"
  #include "/usr/include/exiv2/rwlock.hpp"
  #include "/usr/include/exiv2/slice.hpp"
  #include "/usr/include/exiv2/ssh.hpp"
  #include "/usr/include/exiv2/tags.hpp"
  #include "/usr/include/exiv2/tgaimage.hpp"
  #include "/usr/include/exiv2/tiffimage.hpp"
  #include "/usr/include/exiv2/types.hpp"
  #include "/usr/include/exiv2/utilsvideo.hpp"
  #include "/usr/include/exiv2/value.hpp"
  #include "/usr/include/exiv2/version.hpp"
  #include "/usr/include/exiv2/webpimage.hpp"
  #include "/usr/include/exiv2/xmp_exiv2.hpp"
  #include "/usr/include/exiv2/xmpsidecar.hpp"

  // add namespaces
  namespace Exiv2{typedef int tmp_add_type_1;}
  Exiv2::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace Exiv2{namespace ImageType{typedef int tmp_add_type_2;}}
  Exiv2::ImageType::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace Exiv2{namespace Internal{typedef int tmp_add_type_3;}}
  Exiv2::Internal::tmp_add_type_3 tmp_add_func_3(){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;
  re_pattern_buffer* tmp_add_class_3;
  re_registers* tmp_add_class_4;

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