Temporary header file '/tmp/EvzOnzCpQ9/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/GL/GLwDrawA.h"
  #include "/usr/include/GL/GLwMDrawA.h"

  // add classes
  _XComposeStatus* tmp_add_class_0;
  _XEvent* tmp_add_class_1;
  _XExtData* tmp_add_class_2;
  _XIMHotKeyTrigger* tmp_add_class_3;
  _XIMHotKeyTriggers* tmp_add_class_4;
  _XIMPreeditCaretCallbackStruct* tmp_add_class_5;
  _XIMPreeditDrawCallbackStruct* tmp_add_class_6;
  _XIMPreeditStateNotifyCallbackStruct* tmp_add_class_7;
  _XIMStatusDrawCallbackStruct* tmp_add_class_8;
  _XIMStringConversionCallbackStruct* tmp_add_class_9;
  _XIMStringConversionText* tmp_add_class_10;
  _XIMText* tmp_add_class_11;
  _XImage* tmp_add_class_12;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/EvzOnzCpQ9/dump1.h"

In file included from /tmp/EvzOnzCpQ9/dump1.h:12:
/usr/include/GL/GLwDrawA.h:147:7: error: ‘WidgetClass’ does not name a type
  147 | GLAPI WidgetClass glwDrawingAreaWidgetClass;
      |       ^~~~~~~~~~~
/usr/include/GL/GLwDrawA.h:171:3: error: ‘Dimension’ does not name a type
  171 |   Dimension width,height;
      |   ^~~~~~~~~
/usr/include/GL/GLwDrawA.h:180:12: error: variable or field ‘GLwDrawingAreaMakeCurrent’ declared void
  180 | GLAPI void GLwDrawingAreaMakeCurrent(Widget w,GLXContext ctx);
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/GL/GLwDrawA.h:180:38: error: ‘Widget’ was not declared in this scope
  180 | GLAPI void GLwDrawingAreaMakeCurrent(Widget w,GLXContext ctx);
      |                                      ^~~~~~
/usr/include/GL/GLwDrawA.h:180:58: error: expected primary-expression before ‘ctx’
  180 | GLAPI void GLwDrawingAreaMakeCurrent(Widget w,GLXContext ctx);
      |                                                          ^~~
/usr/include/GL/GLwDrawA.h:181:12: error: variable or field ‘GLwDrawingAreaSwapBuffers’ declared void
  181 | GLAPI void GLwDrawingAreaSwapBuffers(Widget w);
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/GL/GLwDrawA.h:181:38: error: ‘Widget’ was not declared in this scope
  181 | GLAPI void GLwDrawingAreaSwapBuffers(Widget w);
      |                                      ^~~~~~