Temporary header file '/tmp/NZvKd9V5bn/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/nanomsg/bus.h"
  #include "/usr/include/nanomsg/inproc.h"
  #include "/usr/include/nanomsg/ipc.h"
  #include "/usr/include/nanomsg/nn.h"
  #include "/usr/include/nanomsg/pair.h"
  #include "/usr/include/nanomsg/pipeline.h"
  #include "/usr/include/nanomsg/pubsub.h"
  #include "/usr/include/nanomsg/reqrep.h"
  #include "/usr/include/nanomsg/survey.h"
  #include "/usr/include/nanomsg/tcp.h"
  #include "/usr/include/nanomsg/ws.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;
  nn_req_handle* tmp_add_class_4;
  nn_symbol_properties* tmp_add_class_5;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/NZvKd9V5bn/dump1.h"