Temporary header file '/tmp/hRJZRKTudE/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/png++/color.hpp"
  #include "/usr/include/png++/config.hpp"
  #include "/usr/include/png++/consumer.hpp"
  #include "/usr/include/png++/convert_color_space.hpp"
  #include "/usr/include/png++/end_info.hpp"
  #include "/usr/include/png++/error.hpp"
  #include "/usr/include/png++/ga_pixel.hpp"
  #include "/usr/include/png++/generator.hpp"
  #include "/usr/include/png++/gray_pixel.hpp"
  #include "/usr/include/png++/image.hpp"
  #include "/usr/include/png++/image_info.hpp"
  #include "/usr/include/png++/index_pixel.hpp"
  #include "/usr/include/png++/info.hpp"
  #include "/usr/include/png++/info_base.hpp"
  #include "/usr/include/png++/io_base.hpp"
  #include "/usr/include/png++/packed_pixel.hpp"
  #include "/usr/include/png++/palette.hpp"
  #include "/usr/include/png++/pixel_buffer.hpp"
  #include "/usr/include/png++/pixel_traits.hpp"
  #include "/usr/include/png++/png.hpp"
  #include "/usr/include/png++/reader.hpp"
  #include "/usr/include/png++/require_color_space.hpp"
  #include "/usr/include/png++/rgb_pixel.hpp"
  #include "/usr/include/png++/rgba_pixel.hpp"
  #include "/usr/include/png++/solid_pixel_buffer.hpp"
  #include "/usr/include/png++/streaming_base.hpp"
  #include "/usr/include/png++/tRNS.hpp"
  #include "/usr/include/png++/types.hpp"
  #include "/usr/include/png++/writer.hpp"

  // add namespaces
  namespace png{typedef int tmp_add_type_1;}
  png::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace png{namespace detail{typedef int tmp_add_type_2;}}
  png::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;
  png_color_16_struct* tmp_add_class_3;
  png_color_8_struct* tmp_add_class_4;
  png_color_struct* tmp_add_class_5;
  png_row_info_struct* tmp_add_class_6;
  png_sPLT_entry_struct* tmp_add_class_7;
  png_sPLT_struct* tmp_add_class_8;
  png_text_struct* tmp_add_class_9;
  png_time_struct* tmp_add_class_10;
  png_unknown_chunk_t* tmp_add_class_11;

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