Temporary header file '/tmp/Q2EZfdxd0F/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/symmetrica/def.h"
  #include "/usr/include/symmetrica/macro.h"
  #include "/usr/include/symmetrica.h"

  // add classes
  REIHE_mon* tmp_add_class_0;
  REIHE_poly* tmp_add_class_1;
  REIHE_variablen* tmp_add_class_2;
  _G_fpos64_t* tmp_add_class_3;
  _G_fpos_t* tmp_add_class_4;
  _IO_cookie_io_functions_t* tmp_add_class_5;
  bruch* tmp_add_class_6;
  data* tmp_add_class_7;
  ganzdaten* tmp_add_class_8;
  graph* tmp_add_class_9;
  list* tmp_add_class_10;
  loc* tmp_add_class_11;
  longint* tmp_add_class_12;
  matrix* tmp_add_class_13;
  monom* tmp_add_class_14;
  number* tmp_add_class_15;
  object* tmp_add_class_16;
  partition* tmp_add_class_17;
  permutation* tmp_add_class_18;
  reihe* tmp_add_class_19;
  skewpartition* tmp_add_class_20;
  symchar* tmp_add_class_21;
  tableaux* tmp_add_class_22;
  vector* tmp_add_class_23;
  zahldaten* tmp_add_class_24;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/Q2EZfdxd0F/dump1.h"

In file included from /tmp/Q2EZfdxd0F/dump1.h:12:
/usr/include/symmetrica/def.h:51:9: error: "not" cannot be used as a macro name as it is an operator in C++
   51 | #define not !
      |         ^~~
/usr/include/symmetrica/def.h:892:17: error: expected identifier before ‘(’ token
  892 | extern INT class();
      |                 ^
/usr/include/symmetrica/def.h:892:18: error: expected unqualified-id before ‘)’ token
  892 | extern INT class();
      |                  ^