Temporary header file '/tmp/46q6CDcZQK/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/ips4o/base_case.hpp"
  #include "/usr/include/ips4o/block_permutation.hpp"
  #include "/usr/include/ips4o/bucket_pointers.hpp"
  #include "/usr/include/ips4o/buffers.hpp"
  #include "/usr/include/ips4o/classifier.hpp"
  #include "/usr/include/ips4o/cleanup_margins.hpp"
  #include "/usr/include/ips4o/config.hpp"
  #include "/usr/include/ips4o/empty_block_movement.hpp"
  #include "/usr/include/ips4o/ips4o.hpp"
  #include "/usr/include/ips4o/ips4o_fwd.hpp"
  #include "/usr/include/ips4o/local_classification.hpp"
  #include "/usr/include/ips4o/memory.hpp"
  #include "/usr/include/ips4o/parallel.hpp"
  #include "/usr/include/ips4o/partitioning.hpp"
  #include "/usr/include/ips4o/sampling.hpp"
  #include "/usr/include/ips4o/sequential.hpp"
  #include "/usr/include/ips4o/synchronization.hpp"
  #include "/usr/include/ips4o/thread_pool.hpp"
  #include "/usr/include/ips4o/utils.hpp"
  #include "/usr/include/ips4o.hpp"

  // add namespaces
  namespace ips4o{typedef int tmp_add_type_1;}
  ips4o::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace ips4o{namespace detail{typedef int tmp_add_type_2;}}
  ips4o::detail::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace ips4o{namespace parallel{typedef int tmp_add_type_3;}}
  ips4o::parallel::tmp_add_type_3 tmp_add_func_3(){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;
  omp_alloctrait_t* tmp_add_class_3;
  omp_depend_t* tmp_add_class_4;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/46q6CDcZQK/dump1.h"