Temporary header file '/tmp/hevoaAw9Ks/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/opentracing/config.h"
  #include "/usr/include/opentracing/dynamic_load.h"
  #include "/usr/include/opentracing/expected/expected.hpp"
  #include "/usr/include/opentracing/ext/tags.h"
  #include "/usr/include/opentracing/mocktracer/in_memory_recorder.h"
  #include "/usr/include/opentracing/mocktracer/json.h"
  #include "/usr/include/opentracing/mocktracer/json_recorder.h"
  #include "/usr/include/opentracing/mocktracer/recorder.h"
  #include "/usr/include/opentracing/mocktracer/symbols.h"
  #include "/usr/include/opentracing/mocktracer/tracer.h"
  #include "/usr/include/opentracing/mocktracer/tracer_factory.h"
  #include "/usr/include/opentracing/noop.h"
  #include "/usr/include/opentracing/propagation.h"
  #include "/usr/include/opentracing/span.h"
  #include "/usr/include/opentracing/string_view.h"
  #include "/usr/include/opentracing/symbols.h"
  #include "/usr/include/opentracing/tracer.h"
  #include "/usr/include/opentracing/tracer_factory.h"
  #include "/usr/include/opentracing/util.h"
  #include "/usr/include/opentracing/value.h"
  #include "/usr/include/opentracing/variant/recursive_wrapper.hpp"
  #include "/usr/include/opentracing/variant/variant.hpp"
  #include "/usr/include/opentracing/version.h"

  // add namespaces
  namespace opentracing{typedef int tmp_add_type_1;}
  opentracing::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace opentracing{namespace v3{typedef int tmp_add_type_2;}}
  opentracing::v3::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace opentracing{namespace v3{namespace ext{typedef int tmp_add_type_3;}}}
  opentracing::v3::ext::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace opentracing{namespace v3{namespace mocktracer{typedef int tmp_add_type_4;}}}
  opentracing::v3::mocktracer::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace opentracing{namespace v3{namespace util{typedef int tmp_add_type_5;}}}
  opentracing::v3::util::tmp_add_type_5 tmp_add_func_5(){return 0;};
  namespace opentracing{namespace v3{namespace util{namespace detail{typedef int tmp_add_type_6;}}}}
  opentracing::v3::util::detail::tmp_add_type_6 tmp_add_func_6(){return 0;};
  namespace opentracing{namespace v3{namespace expected_detail{typedef int tmp_add_type_7;}}}
  opentracing::v3::expected_detail::tmp_add_type_7 tmp_add_func_7(){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/hevoaAw9Ks/dump1.h"