Bug#861736:

[PICCA Frederic-Emmanuel <frederic-emmanuel.picca@synchrotron-soleil.fr>]

in the napi.h files we saw this.

define CONCAT(__a,__b) __a##__b        /* token concatenation */

#    ifdef __VMS
#        define MANGLE(__arg)   __arg
#    else
#        define MANGLE(__arg)   CONCAT(__arg,_)
#    endif

#    define NXopen              MANGLE(nxiopen)

 /**
   * Open a NeXus file.
   * NXopen honours full path file names. But it also searches
   * for files in all the paths given in the NX_LOAD_PATH environment variable.
   * NX_LOAD_PATH is supposed to hold a list of path string separated by the platform
   * specific path separator. For unix this is the : , for DOS the ; . Please note
   * that crashing on an open NeXus file will result in corrupted data. Only after a NXclose
   * or a NXflush will the data file be valid.
   * \param filename The name of the file to open
   * \param access_method The file access method. This can be:
   * \li NXACC__READ read access
   * \li NXACC_RDWR read write access
   * \li NXACC_CREATE, NXACC_CREATE4 create a new HDF-4 NeXus file
   * \li NXACC_CREATE5 create a new HDF-5 NeXus file
   * \li NXACC_CREATEXML create an XML NeXus file.
   * see #NXaccess_mode
   * Support for HDF-4 is deprecated.
   * \param pHandle A file handle which will be initialized upon successfull completeion of NXopen.
   * \return NX_OK on success, NX_ERROR in the case of an error.
   * \ingroup c_init
   */
extern  NXstatus  NXopen(CONSTCHAR * filename, NXaccess access_method, NXhandle* pHandle);


so we need to check in this method what is going on.