Temporary header file '/tmp/amb9IL3lIA/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/ace/TkReactor/ACE_TkReactor_export.h"
  #include "/usr/include/ace/TkReactor/TkReactor.h"

  // add namespaces
  namespace ACE{typedef int tmp_add_type_1;}
  ACE::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace ACE_Acquire_Method{typedef int tmp_add_type_2;}
  ACE_Acquire_Method::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace ACE_OS{typedef int tmp_add_type_3;}
  ACE_OS::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace ACE_Utils{typedef int tmp_add_type_4;}
  ACE_Utils::tmp_add_type_4 tmp_add_func_4(){return 0;};

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/amb9IL3lIA/dump1.h"

In file included from /tmp/amb9IL3lIA/dump1.h:13:
/usr/include/ace/TkReactor/TkReactor.h:24:15: fatal error: tk.h: No such file or directory
   24 | #include /**/ <tk.h>
      |               ^~~~~~
compilation terminated.