Temporary header file '/tmp/ZNm0eg4zOM/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/anthy/input.h"

  // add classes
  anthy_input_preedit* tmp_add_class_0;
  anthy_input_segment* tmp_add_class_1;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/ZNm0eg4zOM/dump1.h"

In file included from /tmp/ZNm0eg4zOM/dump1.h:12:
/usr/include/anthy/input.h:129:1: error: ‘anthy_context_t’ does not name a type
  129 | anthy_context_t
      | ^~~~~~~~~~~~~~~