Temporary header file '/tmp/MDN_5r6Ut0/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/gerris/batch/render.h"
  #include "/usr/include/gerris/gl/gfsgl.h"
  #include "/usr/include/gerris/gl/gfsgl2D.h"
  #include "/usr/include/gerris/gl/gfsgl3D.h"
  #include "/usr/include/gerris/gl/trackball.h"
  #include "/usr/include/gerris/view/gfkgl.h"
  #include "/usr/include/gerris/view/gfkgl2D.h"
  #include "/usr/include/gerris/view/gfkgl3D.h"
  #include "/usr/include/gerris/view/glade/callbacks.h"
  #include "/usr/include/gerris/view/glade/interface.h"
  #include "/usr/include/gerris/view/glade/support.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/MDN_5r6Ut0/dump1.h"  -I/usr/include/gerris

In file included from /usr/include/gerris/batch/render.h:21,
                 from /tmp/MDN_5r6Ut0/dump1.h:12:
/usr/include/gerris/gl/gfsgl.h:24:10: fatal error: gfs.h: No such file or directory
   24 | #include <gfs.h>
      |          ^~~~~~~
compilation terminated.