Temporary header file '/tmp/iU7EQM0fBS/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/nng/compat/nanomsg/bus.h"
  #include "/usr/include/nng/compat/nanomsg/inproc.h"
  #include "/usr/include/nng/compat/nanomsg/ipc.h"
  #include "/usr/include/nng/compat/nanomsg/nn.h"
  #include "/usr/include/nng/compat/nanomsg/pair.h"
  #include "/usr/include/nng/compat/nanomsg/pipeline.h"
  #include "/usr/include/nng/compat/nanomsg/pubsub.h"
  #include "/usr/include/nng/compat/nanomsg/reqrep.h"
  #include "/usr/include/nng/compat/nanomsg/survey.h"
  #include "/usr/include/nng/compat/nanomsg/tcp.h"
  #include "/usr/include/nng/compat/nanomsg/ws.h"
  #include "/usr/include/nng/nng.h"
  #include "/usr/include/nng/protocol/bus0/bus.h"
  #include "/usr/include/nng/protocol/pair0/pair.h"
  #include "/usr/include/nng/protocol/pair1/pair.h"
  #include "/usr/include/nng/protocol/pipeline0/pull.h"
  #include "/usr/include/nng/protocol/pipeline0/push.h"
  #include "/usr/include/nng/protocol/pubsub0/pub.h"
  #include "/usr/include/nng/protocol/pubsub0/sub.h"
  #include "/usr/include/nng/protocol/reqrep0/rep.h"
  #include "/usr/include/nng/protocol/reqrep0/req.h"
  #include "/usr/include/nng/protocol/survey0/respond.h"
  #include "/usr/include/nng/protocol/survey0/survey.h"
  #include "/usr/include/nng/supplemental/http/http.h"
  #include "/usr/include/nng/supplemental/tls/engine.h"
  #include "/usr/include/nng/supplemental/tls/tls.h"
  #include "/usr/include/nng/supplemental/util/options.h"
  #include "/usr/include/nng/supplemental/util/platform.h"
  #include "/usr/include/nng/transport/inproc/inproc.h"
  #include "/usr/include/nng/transport/ipc/ipc.h"
  #include "/usr/include/nng/transport/tcp/tcp.h"
  #include "/usr/include/nng/transport/tls/tls.h"
  #include "/usr/include/nng/transport/ws/websocket.h"
  #include "/usr/include/nng/transport/zerotier/zerotier.h"

  // add classes
  nn_cmsghdr* tmp_add_class_0;
  nn_iovec* tmp_add_class_1;
  nn_msghdr* tmp_add_class_2;
  nn_pollfd* tmp_add_class_3;
  nng_ctx_s* tmp_add_class_4;
  nng_dialer_s* tmp_add_class_5;
  nng_iov* tmp_add_class_6;
  nng_listener_s* tmp_add_class_7;
  nng_optspec* tmp_add_class_8;
  nng_pipe_s* tmp_add_class_9;
  nng_sockaddr* tmp_add_class_10;
  nng_sockaddr_abstract* tmp_add_class_11;
  nng_sockaddr_in* tmp_add_class_12;
  nng_sockaddr_in6* tmp_add_class_13;
  nng_sockaddr_inproc* tmp_add_class_14;
  nng_sockaddr_path* tmp_add_class_15;
  nng_sockaddr_storage* tmp_add_class_16;
  nng_sockaddr_zt* tmp_add_class_17;
  nng_socket_s* tmp_add_class_18;
  nng_tls_engine_config_ops_s* tmp_add_class_19;
  nng_tls_engine_conn_ops_s* tmp_add_class_20;
  nng_tls_engine_s* tmp_add_class_21;
  nng_url* tmp_add_class_22;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/iU7EQM0fBS/dump1.h"