major_v	OUT:	Major version number
	minor_v	OUT:	Minor version number
	release	OUT:	Release number
	string	OUT:	Version number text string

	Purpose	Retrieves the version information of the current HDF library.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	The version information is compiled into the HDF library, so it is not necessary to have any open files for this function to execute. The string buffer is limited to a length of LIBVSTR_LEN (or 80) characters as defined in hfile.h.

	FORTRAN	integer function hglibver(major_v, minor_v, release, string)
		integer major_v, minor_v, release
		character*(*) string