Temporary header file '/tmp/Uc6FPrXS3_/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _FILE_OFFSET_BITS 64
#define _GXX_NULLPTR_T
#define CLUTTER_ENABLE_COMPOSITOR_API 1
#define _REGEX_NELTS(n)
#define _Atomic
#define PACKED
#ifdef __cplusplus
// C17 compat layer
#define _Alignof(type) alignof(type)
#endif
#define getaddrinfo_a(a,b,c,d) 
typedef float _Float32;
typedef long double _Float64;
typedef double _Float32x;
#define _X_RESTRICT_KYWD

  // add includes
  #include "/usr/include/X11/Xmu/WidgetNode.h"
  #include "/usr/include/X11/Xaw3d/AllWidgets.h"
  #include "/usr/include/X11/Xaw3d/AsciiSink.h"
  #include "/usr/include/X11/Xaw3d/AsciiSinkP.h"
  #include "/usr/include/X11/Xaw3d/AsciiSrc.h"
  #include "/usr/include/X11/Xaw3d/AsciiSrcP.h"
  #include "/usr/include/X11/Xaw3d/AsciiText.h"
  #include "/usr/include/X11/Xaw3d/AsciiTextP.h"
  #include "/usr/include/X11/Xaw3d/Box.h"
  #include "/usr/include/X11/Xaw3d/BoxP.h"
  #include "/usr/include/X11/Xaw3d/Cardinals.h"
  #include "/usr/include/X11/Xaw3d/Command.h"
  #include "/usr/include/X11/Xaw3d/CommandP.h"
  #include "/usr/include/X11/Xaw3d/Dialog.h"
  #include "/usr/include/X11/Xaw3d/DialogP.h"
  #include "/usr/include/X11/Xaw3d/Form.h"
  #include "/usr/include/X11/Xaw3d/FormP.h"
  #include "/usr/include/X11/Xaw3d/Grip.h"
  #include "/usr/include/X11/Xaw3d/GripP.h"
  #include "/usr/include/X11/Xaw3d/Label.h"
  #include "/usr/include/X11/Xaw3d/LabelP.h"
  #include "/usr/include/X11/Xaw3d/Layout.h"
  #include "/usr/include/X11/Xaw3d/LayoutP.h"
  #include "/usr/include/X11/Xaw3d/List.h"
  #include "/usr/include/X11/Xaw3d/ListP.h"
  #include "/usr/include/X11/Xaw3d/MenuButtoP.h"
  #include "/usr/include/X11/Xaw3d/MenuButton.h"
  #include "/usr/include/X11/Xaw3d/MultiSink.h"
  #include "/usr/include/X11/Xaw3d/MultiSinkP.h"
  #include "/usr/include/X11/Xaw3d/MultiSrc.h"
  #include "/usr/include/X11/Xaw3d/MultiSrcP.h"
  #include "/usr/include/X11/Xaw3d/Paned.h"
  #include "/usr/include/X11/Xaw3d/PanedP.h"
  #include "/usr/include/X11/Xaw3d/Panner.h"
  #include "/usr/include/X11/Xaw3d/PannerP.h"
  #include "/usr/include/X11/Xaw3d/Porthole.h"
  #include "/usr/include/X11/Xaw3d/PortholeP.h"
  #include "/usr/include/X11/Xaw3d/Repeater.h"
  #include "/usr/include/X11/Xaw3d/RepeaterP.h"
  #include "/usr/include/X11/Xaw3d/Reports.h"
  #include "/usr/include/X11/Xaw3d/Scrollbar.h"
  #include "/usr/include/X11/Xaw3d/ScrollbarP.h"
  #include "/usr/include/X11/Xaw3d/Simple.h"
  #include "/usr/include/X11/Xaw3d/SimpleMenP.h"
  #include "/usr/include/X11/Xaw3d/SimpleMenu.h"
  #include "/usr/include/X11/Xaw3d/SimpleP.h"
  #include "/usr/include/X11/Xaw3d/Sme.h"
  #include "/usr/include/X11/Xaw3d/SmeBSB.h"
  #include "/usr/include/X11/Xaw3d/SmeBSBP.h"
  #include "/usr/include/X11/Xaw3d/SmeLine.h"
  #include "/usr/include/X11/Xaw3d/SmeLineP.h"
  #include "/usr/include/X11/Xaw3d/SmeP.h"
  #include "/usr/include/X11/Xaw3d/SmeThreeD.h"
  #include "/usr/include/X11/Xaw3d/SmeThreeDP.h"
  #include "/usr/include/X11/Xaw3d/StripCharP.h"
  #include "/usr/include/X11/Xaw3d/StripChart.h"
  #include "/usr/include/X11/Xaw3d/Template.h"
  #include "/usr/include/X11/Xaw3d/TemplateP.h"
  #include "/usr/include/X11/Xaw3d/Text.h"
  #include "/usr/include/X11/Xaw3d/TextP.h"
  #include "/usr/include/X11/Xaw3d/TextSink.h"
  #include "/usr/include/X11/Xaw3d/TextSinkP.h"
  #include "/usr/include/X11/Xaw3d/TextSrc.h"
  #include "/usr/include/X11/Xaw3d/TextSrcP.h"
  #include "/usr/include/X11/Xaw3d/ThreeD.h"
  #include "/usr/include/X11/Xaw3d/ThreeDP.h"
  #include "/usr/include/X11/Xaw3d/Tip.h"
  #include "/usr/include/X11/Xaw3d/TipP.h"
  #include "/usr/include/X11/Xaw3d/Toggle.h"
  #include "/usr/include/X11/Xaw3d/ToggleP.h"
  #include "/usr/include/X11/Xaw3d/Tree.h"
  #include "/usr/include/X11/Xaw3d/TreeP.h"
  #include "/usr/include/X11/Xaw3d/VendorEP.h"
  #include "/usr/include/X11/Xaw3d/Viewport.h"
  #include "/usr/include/X11/Xaw3d/ViewportP.h"
  #include "/usr/include/X11/Xaw3d/Xaw3dP.h"
  #include "/usr/include/X11/Xaw3d/XawImP.h"
  #include "/usr/include/X11/Xaw3d/XawInit.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -U__cplusplus -D_Bool="bool" -fpreprocessed -x c++ -fpermissive -w "/tmp/Uc6FPrXS3_/dump1.i"