Temporary header file '/tmp/d0nTMU2s2S/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/dumbnet.h"
  #include "/usr/include/dumbnet/addr.h"
  #include "/usr/include/dumbnet/arp.h"
  #include "/usr/include/dumbnet/blob.h"
  #include "/usr/include/dumbnet/eth.h"
  #include "/usr/include/dumbnet/fw.h"
  #include "/usr/include/dumbnet/icmp.h"
  #include "/usr/include/dumbnet/intf.h"
  #include "/usr/include/dumbnet/ip.h"
  #include "/usr/include/dumbnet/ip6.h"
  #include "/usr/include/dumbnet/ndisc.h"
  #include "/usr/include/dumbnet/os.h"
  #include "/usr/include/dumbnet/rand.h"
  #include "/usr/include/dumbnet/route.h"
  #include "/usr/include/dumbnet/sctp.h"
  #include "/usr/include/dumbnet/tcp.h"
  #include "/usr/include/dumbnet/tun.h"
  #include "/usr/include/dumbnet/udp.h"

  // add classes
  addr* tmp_add_class_0;
  addrinfo* tmp_add_class_1;
  arp_entry* tmp_add_class_2;
  arp_ethip* tmp_add_class_3;
  arp_hdr* tmp_add_class_4;
  blob* tmp_add_class_5;
  cmsghdr* tmp_add_class_6;
  eth_addr* tmp_add_class_7;
  eth_hdr* tmp_add_class_8;
  fw_rule* tmp_add_class_9;
  gaicb* tmp_add_class_10;
  group_filter* tmp_add_class_11;
  group_req* tmp_add_class_12;
  group_source_req* tmp_add_class_13;
  hostent* tmp_add_class_14;
  icmp_hdr* tmp_add_class_15;
  icmp_msg* tmp_add_class_16;
  icmp_msg_dnsreply* tmp_add_class_17;
  icmp_msg_echo* tmp_add_class_18;
  icmp_msg_idseq* tmp_add_class_19;
  icmp_msg_mask* tmp_add_class_20;
  icmp_msg_needfrag* tmp_add_class_21;
  icmp_msg_quote* tmp_add_class_22;
  icmp_msg_rtradvert* tmp_add_class_23;
  icmp_msg_traceroute* tmp_add_class_24;
  icmp_msg_tstamp* tmp_add_class_25;
  in6_addr* tmp_add_class_26;
  in6_pktinfo* tmp_add_class_27;
  in_addr* tmp_add_class_28;
  in_pktinfo* tmp_add_class_29;
  intf_entry* tmp_add_class_30;
  iovec* tmp_add_class_31;
  ip6_addr* tmp_add_class_32;
  ip6_ext_data_fragment* tmp_add_class_33;
  ip6_ext_data_routing* tmp_add_class_34;
  ip6_ext_data_routing0* tmp_add_class_35;
  ip6_ext_hdr* tmp_add_class_36;
  ip6_hdr* tmp_add_class_37;
  ip6_mtuinfo* tmp_add_class_38;
  ip_hdr* tmp_add_class_39;
  ip_mreq* tmp_add_class_40;
  ip_mreq_source* tmp_add_class_41;
  ip_mreqn* tmp_add_class_42;
  ip_msfilter* tmp_add_class_43;
  ip_opt* tmp_add_class_44;
  ip_opt_data_rr* tmp_add_class_45;
  ip_opt_data_sec* tmp_add_class_46;
  ip_opt_data_tr* tmp_add_class_47;
  ip_opt_data_ts* tmp_add_class_48;
  ip_opts* tmp_add_class_49;
  ipv6_mreq* tmp_add_class_50;
  linger* tmp_add_class_51;
  mmsghdr* tmp_add_class_52;
  msghdr* tmp_add_class_53;
  ndisc_entry* tmp_add_class_54;
  netent* tmp_add_class_55;
  osockaddr* tmp_add_class_56;
  protoent* tmp_add_class_57;
  route_entry* tmp_add_class_58;
  rpcent* tmp_add_class_59;
  sctp_chunkhdr* tmp_add_class_60;
  sctp_chunkhdr_abort* tmp_add_class_61;
  sctp_chunkhdr_cookie_echo* tmp_add_class_62;
  sctp_chunkhdr_init* tmp_add_class_63;
  sctp_chunkhdr_init_ack* tmp_add_class_64;
  sctp_chunkhdr_shutdown_ack* tmp_add_class_65;
  sctp_hdr* tmp_add_class_66;
  servent* tmp_add_class_67;
  sockaddr* tmp_add_class_68;
  sockaddr_in* tmp_add_class_69;
  sockaddr_in6* tmp_add_class_70;
  sockaddr_storage* tmp_add_class_71;
  tcp_hdr* tmp_add_class_72;
  tcp_opt* tmp_add_class_73;
  ucontext_t* tmp_add_class_74;
  ucred* tmp_add_class_75;
  udp_hdr* tmp_add_class_76;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/d0nTMU2s2S/dump1.h"