Temporary header file '/tmp/SdvoiRhc4v/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _TIME_BITS 64
#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/protozero/basic_pbf_builder.hpp"
  #include "/usr/include/protozero/basic_pbf_writer.hpp"
  #include "/usr/include/protozero/buffer_fixed.hpp"
  #include "/usr/include/protozero/buffer_string.hpp"
  #include "/usr/include/protozero/buffer_tmpl.hpp"
  #include "/usr/include/protozero/buffer_vector.hpp"
  #include "/usr/include/protozero/byteswap.hpp"
  #include "/usr/include/protozero/config.hpp"
  #include "/usr/include/protozero/data_view.hpp"
  #include "/usr/include/protozero/exception.hpp"
  #include "/usr/include/protozero/iterators.hpp"
  #include "/usr/include/protozero/pbf_builder.hpp"
  #include "/usr/include/protozero/pbf_message.hpp"
  #include "/usr/include/protozero/pbf_reader.hpp"
  #include "/usr/include/protozero/pbf_writer.hpp"
  #include "/usr/include/protozero/types.hpp"
  #include "/usr/include/protozero/varint.hpp"
  #include "/usr/include/protozero/version.hpp"

  // add namespaces
  namespace protozero{typedef int tmp_add_type_1;}
  protozero::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace protozero{namespace detail{typedef int tmp_add_type_2;}}
  protozero::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/SdvoiRhc4v/dump1.h"