Temporary header file '/tmp/um9qnV_5fz/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#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) 
#define MED_API_23 1
#define MESGERR 1

  // add includes
  #include "/usr/include/MEDerreur.hxx"
  #include "/usr/include/med.h"
  #include "/usr/include/medC_win_dll.h"
  #include "/usr/include/med_err.h"
  #include "/usr/include/med_exit_if.h"
  #include "/usr/include/med_proto.h"
  #include "/usr/include/med_utils.h"
  #include "/usr/include/medequivalence.h"
  #include "/usr/include/medfamily.h"
  #include "/usr/include/medfield.h"
  #include "/usr/include/medfile.h"
  #include "/usr/include/medfilter.h"
  #include "/usr/include/medinterp.h"
  #include "/usr/include/medlibrary.h"
  #include "/usr/include/medlink.h"
  #include "/usr/include/medlocalization.h"
  #include "/usr/include/medmesh.h"
  #include "/usr/include/medparameter.h"
  #include "/usr/include/medprofile.h"
  #include "/usr/include/medstructelement.h"
  #include "/usr/include/medsubdomain.h"

  // add classes
  H5AC_cache_config_t* tmp_add_class_0;
  H5AC_cache_image_config_t* tmp_add_class_1;
  H5E_error1_t* tmp_add_class_2;
  H5E_error2_t* tmp_add_class_3;
  H5FD_class_t* tmp_add_class_4;
  H5FD_free_t* tmp_add_class_5;
  H5FD_hdfs_fapl_t* tmp_add_class_6;
  H5FD_ros3_fapl_t* tmp_add_class_7;
  H5FD_splitter_vfd_config_t* tmp_add_class_8;
  H5FD_t* tmp_add_class_9;
  H5F_info1_t* tmp_add_class_10;
  H5F_info2_t* tmp_add_class_11;
  H5F_retry_info_t* tmp_add_class_12;
  H5F_sect_info_t* tmp_add_class_13;
  H5G_info_t* tmp_add_class_14;
  H5G_stat_t* tmp_add_class_15;
  H5O_hdr_info_t* tmp_add_class_16;
  H5O_info_t* tmp_add_class_17;
  H5O_stat_t* tmp_add_class_18;
  H5T_cdata_t* tmp_add_class_19;
  H5Z_cb_t* tmp_add_class_20;
  H5Z_class1_t* tmp_add_class_21;
  H5Z_class2_t* tmp_add_class_22;
  H5_alloc_stats_t* tmp_add_class_23;
  H5_ih_info_t* tmp_add_class_24;
  MEDerreur* tmp_add_class_25;
  _G_fpos64_t* tmp_add_class_26;
  _G_fpos_t* tmp_add_class_27;
  _IO_cookie_io_functions_t* tmp_add_class_28;
  ompi_status_public_t* tmp_add_class_29;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/um9qnV_5fz/dump1.h"  -I/usr/include/arm-linux-gnueabihf/mpi -I/usr/include/hdf5/openmpi -I/usr/include/arm-linux-gnueabihf/mpi/openmpi