Temporary header file '/tmp/2AgjGzT2cP/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/gtkextra-3.0/gtkextra/gtkbordercombo.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkcharsel.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkcheckitem.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkcolorcombo.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkcombobutton.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkdirtree.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkextra-marshal.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkextra.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkextrafeatures.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkextraicons.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkextratypebuiltins.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkfileicons.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkfilelist.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkfontcombo.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkiconfilesel.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkiconlist.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkitementry.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplot.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplot3d.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotarray.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotbar.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotbox.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotbubble.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotcairo.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotcandle.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotcanvas.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotcanvasellipse.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotcanvasline.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotcanvaspixmap.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotcanvasplot.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotcanvasrectangle.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotcanvastext.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotcsurface.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotdata.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotdt.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotflux.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotgdk.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotpc.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotpixmap.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotpolar.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotprint.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotps.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotsegment.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkplotsurface.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtkpsfont.h"
  #include "/usr/include/gtkextra-3.0/gtkextra/gtktogglecombo.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/2AgjGzT2cP/dump1.h"  -I/usr/include/gtkextra-3.0

In file included from /usr/include/gtkextra-3.0/gtkextra/gtkbordercombo.h:28,
                 from /tmp/2AgjGzT2cP/dump1.h:12:
/usr/include/gtkextra-3.0/gtkextra/gtkcombobutton.h:24:10: fatal error: gdk/gdk.h: No such file or directory
   24 | #include <gdk/gdk.h>
      |          ^~~~~~~~~~~
compilation terminated.