Temporary header file '/tmp/XOI3sEMh_y/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
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/poppler/cpp/poppler-destination.h"
  #include "/usr/include/poppler/cpp/poppler-document.h"
  #include "/usr/include/poppler/cpp/poppler-embedded-file.h"
  #include "/usr/include/poppler/cpp/poppler-font.h"
  #include "/usr/include/poppler/cpp/poppler-global.h"
  #include "/usr/include/poppler/cpp/poppler-image.h"
  #include "/usr/include/poppler/cpp/poppler-page-renderer.h"
  #include "/usr/include/poppler/cpp/poppler-page-transition.h"
  #include "/usr/include/poppler/cpp/poppler-page.h"
  #include "/usr/include/poppler/cpp/poppler-rectangle.h"
  #include "/usr/include/poppler/cpp/poppler-toc.h"
  #include "/usr/include/poppler/cpp/poppler-version.h"
  #include "/usr/include/poppler/cpp/poppler_cpp_export.h"

  // add namespaces
  namespace poppler{typedef int tmp_add_type_1;}
  poppler::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace poppler{namespace detail{typedef int tmp_add_type_2;}}
  poppler::detail::tmp_add_type_2 tmp_add_func_2(){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;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/XOI3sEMh_y/dump1.h"