Temporary header file '/tmp/oFI8J0jx8E/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/libalglib/alglibinternal.h"
  #include "/usr/include/libalglib/alglibmisc.h"
  #include "/usr/include/libalglib/ap.h"
  #include "/usr/include/libalglib/dataanalysis.h"
  #include "/usr/include/libalglib/diffequations.h"
  #include "/usr/include/libalglib/fasttransforms.h"
  #include "/usr/include/libalglib/integration.h"
  #include "/usr/include/libalglib/interpolation.h"
  #include "/usr/include/libalglib/kernels_avx2.h"
  #include "/usr/include/libalglib/kernels_fma.h"
  #include "/usr/include/libalglib/kernels_sse2.h"
  #include "/usr/include/libalglib/linalg.h"
  #include "/usr/include/libalglib/optimization.h"
  #include "/usr/include/libalglib/solvers.h"
  #include "/usr/include/libalglib/specialfunctions.h"
  #include "/usr/include/libalglib/statistics.h"
  #include "/usr/include/libalglib/stdafx.h"

  // add namespaces
  namespace alglib{typedef int tmp_add_type_1;}
  alglib::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace alglib_impl{typedef int tmp_add_type_2;}
  alglib_impl::tmp_add_type_2 tmp_add_func_2(){return 0;};

  // 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;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/oFI8J0jx8E/dump1.h"