Temporary header file '/tmp/6BabmexFob/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/ipeattributes.h"
  #include "/usr/include/ipebase.h"
  #include "/usr/include/ipebitmap.h"
  #include "/usr/include/ipecanvas.h"
  #include "/usr/include/ipecanvas_cocoa.h"
  #include "/usr/include/ipecanvas_gtk.h"
  #include "/usr/include/ipecanvas_qt.h"
  #include "/usr/include/ipecanvas_win.h"
  #include "/usr/include/ipedoc.h"
  #include "/usr/include/ipefactory.h"
  #include "/usr/include/ipegeo.h"
  #include "/usr/include/ipegroup.h"
  #include "/usr/include/ipeimage.h"
  #include "/usr/include/ipeiml.h"
  #include "/usr/include/ipelatex.h"
  #include "/usr/include/ipelet.h"
  #include "/usr/include/ipelib.h"
  #include "/usr/include/ipeobject.h"
  #include "/usr/include/ipepage.h"
  #include "/usr/include/ipepainter.h"
  #include "/usr/include/ipepath.h"
  #include "/usr/include/ipepdfparser.h"
  #include "/usr/include/ipepdfview.h"
  #include "/usr/include/ipepdfview_cocoa.h"
  #include "/usr/include/ipepdfview_qt.h"
  #include "/usr/include/ipepdfview_win.h"
  #include "/usr/include/ipepdfwriter.h"
  #include "/usr/include/ipepswriter.h"
  #include "/usr/include/ipereference.h"
  #include "/usr/include/iperesources.h"
  #include "/usr/include/ipeselector_cocoa.h"
  #include "/usr/include/ipeselector_qt.h"
  #include "/usr/include/ipeshape.h"
  #include "/usr/include/ipesnap.h"
  #include "/usr/include/ipestyle.h"
  #include "/usr/include/ipetext.h"
  #include "/usr/include/ipetool.h"
  #include "/usr/include/ipetoolbase.h"
  #include "/usr/include/ipeutils.h"
  #include "/usr/include/ipexml.h"

  // add namespaces
  namespace ipe{typedef int tmp_add_type_1;}
  ipe::tmp_add_type_1 tmp_add_func_1(){return 0;};

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/6BabmexFob/dump1.h"

In file included from /tmp/6BabmexFob/dump1.h:16:
/usr/include/ipecanvas_cocoa.h:37:9: fatal error: Cocoa/Cocoa.h: No such file or directory
   37 | #import <Cocoa/Cocoa.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.