Temporary header file '/tmp/18gk0BJKHE/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/arm-linux-gnueabihf/libheif/heif.h"
  #include "/usr/include/arm-linux-gnueabihf/libheif/heif_cxx.h"
  #include "/usr/include/arm-linux-gnueabihf/libheif/heif_plugin.h"
  #include "/usr/include/arm-linux-gnueabihf/libheif/heif_version.h"

  // add namespaces
  namespace heif{typedef int tmp_add_type_1;}
  heif::tmp_add_type_1 tmp_add_func_1(){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;
  heif_color_profile_nclx* tmp_add_class_3;
  heif_decoder_plugin* tmp_add_class_4;
  heif_decoding_options* tmp_add_class_5;
  heif_depth_representation_info* tmp_add_class_6;
  heif_encoder_parameter* tmp_add_class_7;
  heif_encoder_plugin* tmp_add_class_8;
  heif_encoding_options* tmp_add_class_9;
  heif_error* tmp_add_class_10;
  heif_init_params* tmp_add_class_11;
  heif_plugin_info* tmp_add_class_12;
  heif_reader* tmp_add_class_13;
  heif_writer* tmp_add_class_14;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/18gk0BJKHE/dump1.h"