Temporary header file '/tmp/iWDn6WfEg_/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/time.h"
  #include "/usr/include/osip2/osip.h"
  #include "/usr/include/osip2/osip_condv.h"
  #include "/usr/include/osip2/osip_dialog.h"
  #include "/usr/include/osip2/osip_fifo.h"
  #include "/usr/include/osip2/osip_mt.h"
  #include "/usr/include/osip2/osip_time.h"
  #include "/usr/include/osipparser2/headers/osip_accept.h"
  #include "/usr/include/osipparser2/headers/osip_accept_encoding.h"
  #include "/usr/include/osipparser2/headers/osip_accept_language.h"
  #include "/usr/include/osipparser2/headers/osip_alert_info.h"
  #include "/usr/include/osipparser2/headers/osip_allow.h"
  #include "/usr/include/osipparser2/headers/osip_authentication_info.h"
  #include "/usr/include/osipparser2/headers/osip_authorization.h"
  #include "/usr/include/osipparser2/headers/osip_call_id.h"
  #include "/usr/include/osipparser2/headers/osip_call_info.h"
  #include "/usr/include/osipparser2/headers/osip_contact.h"
  #include "/usr/include/osipparser2/headers/osip_content_disposition.h"
  #include "/usr/include/osipparser2/headers/osip_content_encoding.h"
  #include "/usr/include/osipparser2/headers/osip_content_length.h"
  #include "/usr/include/osipparser2/headers/osip_content_type.h"
  #include "/usr/include/osipparser2/headers/osip_cseq.h"
  #include "/usr/include/osipparser2/headers/osip_error_info.h"
  #include "/usr/include/osipparser2/headers/osip_from.h"
  #include "/usr/include/osipparser2/headers/osip_header.h"
  #include "/usr/include/osipparser2/headers/osip_mime_version.h"
  #include "/usr/include/osipparser2/headers/osip_proxy_authenticate.h"
  #include "/usr/include/osipparser2/headers/osip_proxy_authentication_info.h"
  #include "/usr/include/osipparser2/headers/osip_proxy_authorization.h"
  #include "/usr/include/osipparser2/headers/osip_record_route.h"
  #include "/usr/include/osipparser2/headers/osip_route.h"
  #include "/usr/include/osipparser2/headers/osip_to.h"
  #include "/usr/include/osipparser2/headers/osip_via.h"
  #include "/usr/include/osipparser2/headers/osip_www_authenticate.h"
  #include "/usr/include/osipparser2/osip_body.h"
  #include "/usr/include/osipparser2/osip_const.h"
  #include "/usr/include/osipparser2/osip_headers.h"
  #include "/usr/include/osipparser2/osip_list.h"
  #include "/usr/include/osipparser2/osip_md5.h"
  #include "/usr/include/osipparser2/osip_message.h"
  #include "/usr/include/osipparser2/osip_parser.h"
  #include "/usr/include/osipparser2/osip_port.h"
  #include "/usr/include/osipparser2/osip_uri.h"
  #include "/usr/include/osipparser2/sdp_message.h"

  // 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;
  ixt* tmp_add_class_3;
  osip* tmp_add_class_4;
  osip_accept_encoding* tmp_add_class_5;
  osip_authentication_info* tmp_add_class_6;
  osip_authorization* tmp_add_class_7;
  osip_body* tmp_add_class_8;
  osip_call_id* tmp_add_class_9;
  osip_call_info* tmp_add_class_10;
  osip_content_length* tmp_add_class_11;
  osip_content_type* tmp_add_class_12;
  osip_cseq* tmp_add_class_13;
  osip_dialog* tmp_add_class_14;
  osip_event* tmp_add_class_15;
  osip_fifo* tmp_add_class_16;
  osip_from* tmp_add_class_17;
  osip_header* tmp_add_class_18;
  osip_ict* tmp_add_class_19;
  osip_ist* tmp_add_class_20;
  osip_list* tmp_add_class_21;
  osip_list_iterator* tmp_add_class_22;
  osip_message* tmp_add_class_23;
  osip_naptr* tmp_add_class_24;
  osip_nict* tmp_add_class_25;
  osip_nist* tmp_add_class_26;
  osip_srv_entry* tmp_add_class_27;
  osip_srv_record* tmp_add_class_28;
  osip_transaction* tmp_add_class_29;
  osip_uri* tmp_add_class_30;
  osip_uri_param* tmp_add_class_31;
  osip_via* tmp_add_class_32;
  osip_www_authenticate* tmp_add_class_33;
  sdp_attribute* tmp_add_class_34;
  sdp_bandwidth* tmp_add_class_35;
  sdp_connection* tmp_add_class_36;
  sdp_key* tmp_add_class_37;
  sdp_media* tmp_add_class_38;
  sdp_message* tmp_add_class_39;
  sdp_time_descr* tmp_add_class_40;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/iWDn6WfEg_/dump1.h"