Temporary header file '/tmp/2nW6Kxqf7E/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _TIME_BITS 64
#define _FILE_OFFSET_BITS 64
#define _GXX_NULLPTR_T
#define CLUTTER_ENABLE_COMPOSITOR_API 1
#define _REGEX_NELTS(n)
#define _Atomic
#define PACKED
#ifdef __cplusplus
// C17 compat layer
#define _Alignof(type) alignof(type)
#endif
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/m4ri/brilliantrussian.h"
  #include "/usr/include/m4ri/debug_dump.h"
  #include "/usr/include/m4ri/djb.h"
  #include "/usr/include/m4ri/echelonform.h"
  #include "/usr/include/m4ri/graycode.h"
  #include "/usr/include/m4ri/io.h"
  #include "/usr/include/m4ri/m4ri.h"
  #include "/usr/include/m4ri/m4ri_config.h"
  #include "/usr/include/m4ri/misc.h"
  #include "/usr/include/m4ri/mmc.h"
  #include "/usr/include/m4ri/mp.h"
  #include "/usr/include/m4ri/mzd.h"
  #include "/usr/include/m4ri/mzp.h"
  #include "/usr/include/m4ri/parity.h"
  #include "/usr/include/m4ri/ple.h"
  #include "/usr/include/m4ri/ple_russian.h"
  #include "/usr/include/m4ri/solve.h"
  #include "/usr/include/m4ri/strassen.h"
  #include "/usr/include/m4ri/triangular.h"
  #include "/usr/include/m4ri/triangular_russian.h"
  #include "/usr/include/m4ri/xor.h"

  // add classes
  _G_fpos64_t* tmp_add_class_0;
  _G_fpos_t* tmp_add_class_1;
  _IO_cookie_io_functions_t* tmp_add_class_2;
  _mm_block* tmp_add_class_3;
  mzd_t* tmp_add_class_4;
  mzp_t* tmp_add_class_5;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/2nW6Kxqf7E/dump1.h"