Temporary header file '/tmp/8QO9kBZ0bZ/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/X11/Yfgl.h"
  #include "/usr/include/X11/Ygl.h"
  #include "/usr/include/X11/Ygltypes.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/8QO9kBZ0bZ/dump1.h"

In file included from /tmp/8QO9kBZ0bZ/dump1.h:12:
/usr/include/X11/Yfgl.h:7:33: error: invalid digit "8" in octal constant
    7 | C     $Id: Yfgl.h,v 4.3 2005-02-08 16:31:04+01 fred Exp fred $
      |                                 ^~
/usr/include/X11/Yfgl.h:10:7: error: stray ‘#’ in program
   10 | C     #ifndef   _YFGL_INCLUDED_
      |       ^
/usr/include/X11/Yfgl.h:11:7: error: stray ‘#’ in program
   11 | C     #define _YFGL_INCLUDED_
      |       ^
/usr/include/X11/Yfgl.h:615:7: error: stray ‘#’ in program
  615 | C     #endif /* _YFGL_INCLUDED_ */
      |       ^
/usr/include/X11/Yfgl.h:1:1: error: ‘C’ does not name a type
    1 | C     -*- fortran -*-
      | ^