Temporary header file '/tmp/BV8YWdIp1I/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/core/location.h"
  #include "/usr/include/core/net/error.h"
  #include "/usr/include/core/net/http/client.h"
  #include "/usr/include/core/net/http/content_type.h"
  #include "/usr/include/core/net/http/error.h"
  #include "/usr/include/core/net/http/header.h"
  #include "/usr/include/core/net/http/method.h"
  #include "/usr/include/core/net/http/request.h"
  #include "/usr/include/core/net/http/response.h"
  #include "/usr/include/core/net/http/status.h"
  #include "/usr/include/core/net/http/streaming_client.h"
  #include "/usr/include/core/net/http/streaming_request.h"
  #include "/usr/include/core/net/uri.h"
  #include "/usr/include/core/net/visibility.h"

  // add namespaces
  namespace core{typedef int tmp_add_type_1;}
  core::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace core{namespace net{typedef int tmp_add_type_2;}}
  core::net::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace core{namespace net{namespace http{typedef int tmp_add_type_3;}}}
  core::net::http::tmp_add_type_3 tmp_add_func_3(){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/BV8YWdIp1I/dump1.h"