Temporary header file '/tmp/7vXdTw8DbU/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/libxnee/datastrings.h"
  #include "/usr/include/libxnee/feedback.h"
  #include "/usr/include/libxnee/print.h"
  #include "/usr/include/libxnee/print_varargs.h"
  #include "/usr/include/libxnee/x11_files.h"
  #include "/usr/include/libxnee/xnee.h"
  #include "/usr/include/libxnee/xnee_alloc.h"
  #include "/usr/include/libxnee/xnee_buffer.h"
  #include "/usr/include/libxnee/xnee_callback.h"
  #include "/usr/include/libxnee/xnee_display.h"
  #include "/usr/include/libxnee/xnee_dl.h"
  #include "/usr/include/libxnee/xnee_error.h"
  #include "/usr/include/libxnee/xnee_expr.h"
  #include "/usr/include/libxnee/xnee_fake.h"
  #include "/usr/include/libxnee/xnee_fileop.h"
  #include "/usr/include/libxnee/xnee_grab.h"
  #include "/usr/include/libxnee/xnee_internal.h"
  #include "/usr/include/libxnee/xnee_keysym.h"
  #include "/usr/include/libxnee/xnee_km.h"
  #include "/usr/include/libxnee/xnee_plugin.h"
  #include "/usr/include/libxnee/xnee_range.h"
  #include "/usr/include/libxnee/xnee_record.h"
  #include "/usr/include/libxnee/xnee_replay.h"
  #include "/usr/include/libxnee/xnee_resolution.h"
  #include "/usr/include/libxnee/xnee_resource.h"
  #include "/usr/include/libxnee/xnee_sem.h"
  #include "/usr/include/libxnee/xnee_session.h"
  #include "/usr/include/libxnee/xnee_setget.h"
  #include "/usr/include/libxnee/xnee_settings.h"
  #include "/usr/include/libxnee/xnee_strings.h"
  #include "/usr/include/libxnee/xnee_threshold.h"
  #include "/usr/include/libxnee/xnee_time.h"
  #include "/usr/include/libxnee/xnee_utils.h"
  #include "/usr/include/libxnee/xnee_window.h"
  #include "/usr/include/libxnee/xnee_xinput.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/7vXdTw8DbU/dump1.h"

In file included from /usr/include/libxnee/xnee.h:38,
                 from /usr/include/libxnee/feedback.h:33,
                 from /tmp/7vXdTw8DbU/dump1.h:13:
/usr/include/libxnee/x11_files.h:32:10: fatal error: X11/Xproto.h: No such file or directory
   32 | #include <X11/Xproto.h>
      |          ^~~~~~~~~~~~~~
compilation terminated.