Temporary header file '/tmp/0gsjpSP1Kl/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

  // add includes
  #include "/usr/include/libnfnetlink/libnfnetlink.h"
  #include "/usr/include/libnfnetlink/linux_nfnetlink.h"
  #include "/usr/include/libnfnetlink/linux_nfnetlink_compat.h"

  // add classes
  cmsghdr* tmp_add_class_0;
  iovec* tmp_add_class_1;
  linger* tmp_add_class_2;
  mmsghdr* tmp_add_class_3;
  msghdr* tmp_add_class_4;
  nfattr* tmp_add_class_5;
  nfgenmsg* tmp_add_class_6;
  nfnl_callback* tmp_add_class_7;
  nfnlhdr* tmp_add_class_8;
  nl_mmap_hdr* tmp_add_class_9;
  nl_mmap_req* tmp_add_class_10;
  nl_pktinfo* tmp_add_class_11;
  nla_bitfield32* tmp_add_class_12;
  nlattr* tmp_add_class_13;
  nlmsgerr* tmp_add_class_14;
  nlmsghdr* tmp_add_class_15;
  osockaddr* tmp_add_class_16;
  sockaddr* tmp_add_class_17;
  sockaddr_nl* tmp_add_class_18;
  sockaddr_storage* tmp_add_class_19;
  ucred* tmp_add_class_20;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/0gsjpSP1Kl/dump1.h"