Temporary header file '/tmp/jJey25N7en/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
#ifdef __cplusplus
// C17 compat layer
#define _Alignof(type) alignof(type)
#endif
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/xtl/xany.hpp"
  #include "/usr/include/xtl/xbase64.hpp"
  #include "/usr/include/xtl/xbasic_fixed_string.hpp"
  #include "/usr/include/xtl/xclosure.hpp"
  #include "/usr/include/xtl/xcomplex.hpp"
  #include "/usr/include/xtl/xcomplex_sequence.hpp"
  #include "/usr/include/xtl/xdynamic_bitset.hpp"
  #include "/usr/include/xtl/xfunctional.hpp"
  #include "/usr/include/xtl/xhalf_float.hpp"
  #include "/usr/include/xtl/xhalf_float_impl.hpp"
  #include "/usr/include/xtl/xhash.hpp"
  #include "/usr/include/xtl/xhierarchy_generator.hpp"
  #include "/usr/include/xtl/xiterator_base.hpp"
  #include "/usr/include/xtl/xjson.hpp"
  #include "/usr/include/xtl/xmasked_value.hpp"
  #include "/usr/include/xtl/xmasked_value_meta.hpp"
  #include "/usr/include/xtl/xmeta_utils.hpp"
  #include "/usr/include/xtl/xmultimethods.hpp"
  #include "/usr/include/xtl/xoptional.hpp"
  #include "/usr/include/xtl/xoptional_meta.hpp"
  #include "/usr/include/xtl/xoptional_sequence.hpp"
  #include "/usr/include/xtl/xplatform.hpp"
  #include "/usr/include/xtl/xproxy_wrapper.hpp"
  #include "/usr/include/xtl/xsequence.hpp"
  #include "/usr/include/xtl/xspan.hpp"
  #include "/usr/include/xtl/xspan_impl.hpp"
  #include "/usr/include/xtl/xsystem.hpp"
  #include "/usr/include/xtl/xtl_config.hpp"
  #include "/usr/include/xtl/xtype_traits.hpp"
  #include "/usr/include/xtl/xvariant.hpp"
  #include "/usr/include/xtl/xvariant_impl.hpp"
  #include "/usr/include/xtl/xvisitor.hpp"

  // add namespaces
  namespace mpark{typedef int tmp_add_type_1;}
  mpark::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace mpark{namespace detail{typedef int tmp_add_type_2;}}
  mpark::detail::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace mpark{namespace detail{namespace access{typedef int tmp_add_type_3;}}}
  mpark::detail::access::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace mpark{namespace detail{namespace hash{typedef int tmp_add_type_4;}}}
  mpark::detail::hash::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace mpark{namespace detail{namespace visitation{typedef int tmp_add_type_5;}}}
  mpark::detail::visitation::tmp_add_type_5 tmp_add_func_5(){return 0;};
  namespace mpark{namespace lib{typedef int tmp_add_type_6;}}
  mpark::lib::tmp_add_type_6 tmp_add_func_6(){return 0;};
  namespace mpark{namespace lib{namespace cpp14{typedef int tmp_add_type_7;}}}
  mpark::lib::cpp14::tmp_add_type_7 tmp_add_func_7(){return 0;};
  namespace mpark{namespace lib{namespace cpp17{typedef int tmp_add_type_8;}}}
  mpark::lib::cpp17::tmp_add_type_8 tmp_add_func_8(){return 0;};
  namespace mpark{namespace lib{namespace cpp17{namespace detail{typedef int tmp_add_type_9;}}}}
  mpark::lib::cpp17::detail::tmp_add_type_9 tmp_add_func_9(){return 0;};
  namespace mpark{namespace lib{namespace cpp17{namespace detail{namespace swappable{typedef int tmp_add_type_10;}}}}}
  mpark::lib::cpp17::detail::swappable::tmp_add_type_10 tmp_add_func_10(){return 0;};
  namespace nlohmann{typedef int tmp_add_type_11;}
  nlohmann::tmp_add_type_11 tmp_add_func_11(){return 0;};
  namespace tcb{typedef int tmp_add_type_12;}
  tcb::tmp_add_type_12 tmp_add_func_12(){return 0;};
  namespace tcb{namespace detail{typedef int tmp_add_type_13;}}
  tcb::detail::tmp_add_type_13 tmp_add_func_13(){return 0;};
  namespace xtl{typedef int tmp_add_type_14;}
  xtl::tmp_add_type_14 tmp_add_func_14(){return 0;};
  namespace xtl{namespace detail{typedef int tmp_add_type_15;}}
  xtl::detail::tmp_add_type_15 tmp_add_func_15(){return 0;};
  namespace xtl{namespace mpl{typedef int tmp_add_type_16;}}
  xtl::mpl::tmp_add_type_16 tmp_add_func_16(){return 0;};
  namespace xtl{namespace mpl{namespace detail{typedef int tmp_add_type_17;}}}
  xtl::mpl::detail::tmp_add_type_17 tmp_add_func_17(){return 0;};
  namespace half_float{typedef int tmp_add_type_18;}
  half_float::tmp_add_type_18 tmp_add_func_18(){return 0;};
  namespace half_float{namespace detail{typedef int tmp_add_type_19;}}
  half_float::detail::tmp_add_type_19 tmp_add_func_19(){return 0;};
  namespace half_float{namespace literal{typedef int tmp_add_type_20;}}
  half_float::literal::tmp_add_type_20 tmp_add_func_20(){return 0;};
  namespace nlohmann{namespace json_abi_v3_11_2{typedef int tmp_add_type_21;}}
  nlohmann::json_abi_v3_11_2::tmp_add_type_21 tmp_add_func_21(){return 0;};
  namespace nlohmann{namespace json_abi_v3_11_2{namespace detail{typedef int tmp_add_type_22;}}}
  nlohmann::json_abi_v3_11_2::detail::tmp_add_type_22 tmp_add_func_22(){return 0;};
  namespace nlohmann{namespace json_abi_v3_11_2{namespace detail2{typedef int tmp_add_type_23;}}}
  nlohmann::json_abi_v3_11_2::detail2::tmp_add_type_23 tmp_add_func_23(){return 0;};
  namespace nlohmann{namespace json_abi_v3_11_2{namespace detail{namespace container_input_adapter_factory_impl{typedef int tmp_add_type_24;}}}}
  nlohmann::json_abi_v3_11_2::detail::container_input_adapter_factory_impl::tmp_add_type_24 tmp_add_func_24(){return 0;};
  namespace nlohmann{namespace json_abi_v3_11_2{namespace detail{namespace dtoa_impl{typedef int tmp_add_type_25;}}}}
  nlohmann::json_abi_v3_11_2::detail::dtoa_impl::tmp_add_type_25 tmp_add_func_25(){return 0;};
  namespace nlohmann{namespace json_abi_v3_11_2{namespace detail{namespace impl{typedef int tmp_add_type_26;}}}}
  nlohmann::json_abi_v3_11_2::detail::impl::tmp_add_type_26 tmp_add_func_26(){return 0;};
  namespace nlohmann{namespace json_abi_v3_11_2{namespace literals{typedef int tmp_add_type_27;}}}
  nlohmann::json_abi_v3_11_2::literals::tmp_add_type_27 tmp_add_func_27(){return 0;};
  namespace nlohmann{namespace json_abi_v3_11_2{namespace literals{namespace json_literals{typedef int tmp_add_type_28;}}}}
  nlohmann::json_abi_v3_11_2::literals::json_literals::tmp_add_type_28 tmp_add_func_28(){return 0;};
  namespace xtl{namespace detail_bitset{typedef int tmp_add_type_29;}}
  xtl::detail_bitset::tmp_add_type_29 tmp_add_func_29(){return 0;};
  namespace xtl{namespace string_policy{typedef int tmp_add_type_30;}}
  xtl::string_policy::tmp_add_type_30 tmp_add_func_30(){return 0;};
  namespace xtl{namespace traits_detail{typedef int tmp_add_type_31;}}
  xtl::traits_detail::tmp_add_type_31 tmp_add_func_31(){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/jJey25N7en/dump1.h"

