Temporary header file '/tmp/wQYFH0Jsc8/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/arpack++/arch.h"
  #include "/usr/include/arpack++/arcomp.h"
  #include "/usr/include/arpack++/arerror.h"
  #include "/usr/include/arpack++/argcomp.h"
  #include "/usr/include/arpack++/argeig.h"
  #include "/usr/include/arpack++/argnsym.h"
  #include "/usr/include/arpack++/argsym.h"
  #include "/usr/include/arpack++/arhbmat.h"
  #include "/usr/include/arpack++/armat.h"
  #include "/usr/include/arpack++/arpackf.h"
  #include "/usr/include/arpack++/arrgcomp.h"
  #include "/usr/include/arpack++/arrgeig.h"
  #include "/usr/include/arpack++/arrgnsym.h"
  #include "/usr/include/arpack++/arrgsym.h"
  #include "/usr/include/arpack++/arrscomp.h"
  #include "/usr/include/arpack++/arrseig.h"
  #include "/usr/include/arpack++/arrsnsym.h"
  #include "/usr/include/arpack++/arrssym.h"
  #include "/usr/include/arpack++/arscomp.h"
  #include "/usr/include/arpack++/arseig.h"
  #include "/usr/include/arpack++/arsnsym.h"
  #include "/usr/include/arpack++/arssym.h"
  #include "/usr/include/arpack++/blas1c.h"
  #include "/usr/include/arpack++/blas1f.h"
  #include "/usr/include/arpack++/caupp.h"
  #include "/usr/include/arpack++/ceupp.h"
  #include "/usr/include/arpack++/debug.h"
  #include "/usr/include/arpack++/lapackc.h"
  #include "/usr/include/arpack++/lapackf.h"
  #include "/usr/include/arpack++/naupp.h"
  #include "/usr/include/arpack++/neupp.h"
  #include "/usr/include/arpack++/saupp.h"
  #include "/usr/include/arpack++/seupp.h"
  #include "/usr/include/arpack++/superluc.h"
  #include "/usr/include/arpack++/umfpackc.h"
  #include "/usr/include/arpack++/umfpackf.h"

  // add classes
  ArpackError* tmp_add_class_0;
  _G_fpos64_t* tmp_add_class_1;
  _G_fpos_t* tmp_add_class_2;
  _IO_cookie_io_functions_t* tmp_add_class_3;
  arpack_debug* tmp_add_class_4;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/wQYFH0Jsc8/dump1.h"