Temporary header file '/tmp/iov5JIAdol/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/Fcitx5/Utils/fcitx-utils/capabilityflags.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/charutils.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/color.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/connectableobject.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/cutf8.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/dbus/bus.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/dbus/matchrule.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/dbus/message.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/dbus/message_details.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/dbus/objectvtable.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/dbus/servicewatcher.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/element.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/event.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/eventdispatcher.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/fcitxutils_export.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/flags.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/fs.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/handlertable.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/handlertable_details.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/i18n.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/i18nstring.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/inputbuffer.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/intrusivelist.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/key.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/keysym.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/keysymgen.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/library.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/log.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/macros.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/metastring.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/misc.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/rect.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/semver.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/signals.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/signals_details.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/standardpath.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/stringutils.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/stringutils_details.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/testing.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/textformatflags.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/trackableobject.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/tuplehelpers.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/unixfd.h"
  #include "/usr/include/Fcitx5/Utils/fcitx-utils/utf8.h"

  // add namespaces
  namespace fcitx{typedef int tmp_add_type_1;}
  fcitx::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace fcitx{namespace charutils{typedef int tmp_add_type_2;}}
  fcitx::charutils::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace fcitx{namespace dbus{typedef int tmp_add_type_3;}}
  fcitx::dbus::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace fcitx{namespace filter{typedef int tmp_add_type_4;}}
  fcitx::filter::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace fcitx{namespace fs{typedef int tmp_add_type_5;}}
  fcitx::fs::tmp_add_type_5 tmp_add_func_5(){return 0;};
  namespace fcitx{namespace stringutils{typedef int tmp_add_type_6;}}
  fcitx::stringutils::tmp_add_type_6 tmp_add_func_6(){return 0;};
  namespace fcitx{namespace stringutils{namespace details{typedef int tmp_add_type_7;}}}
  fcitx::stringutils::details::tmp_add_type_7 tmp_add_func_7(){return 0;};
  namespace fcitx{namespace utf8{typedef int tmp_add_type_8;}}
  fcitx::utf8::tmp_add_type_8 tmp_add_func_8(){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/iov5JIAdol/dump1.h"  -I/usr/include/Fcitx5/Utils