2005-10-25  Gaurav Gautam  <gauravga@noida.hcltech.com> <gauravgautam123@gmail.com>

        * arith.c (gfc_enum_initializer): New function added.
        (gfc_check_integer_range): prototype changed. 
        * decl.c (enumerator_history): New typedef added.
        (last_initializer, enum_history, max_enum): New variables
        (create_enum_history, gfc_free_enum_history): New functions.
        (add_init_expr_to_sym): Modified to call function create_enum_history.
        (variable_decl): Modified to parse enumerator definition.
        Call gfc_free_enum_history if gfc_match_array_spec returns ERROR.
        Calls gfc_enum_initializer to add initializer to enumerator. Calls
        gfc_enum_initializer and appropriate error handling is done. Last initialiser is
        stored here to be used next time.
        (match_attr_spec): Modified to assign PARAMETER attribute, by 
	calling function gfc_add_flavor. Also checks that no other 
	attribute is present. Issues the appropriate errors.
        (gfc_match_data_decl): Issues approprite errors, 
	if match_type_spec do not return desired return values.
        (reset_enum_kind, gfc_match_enum, gfc_match_enumerator_def): New Function.
        (gfc_match_end): New case COMP_ENUM added. Parses the end-enum stmt.
        * gfortran.h (gfc_statement): ST_ENUM, ST_ENUMERATOR, ST_END_ENUM added. 
        (symbol_attribute): bit field for enumerator added.
        (gfc_options): fshort_enums added to gfc_option.
        (gfc_enum_initializer, gfc_check_integer_range): prototypes added.
        * options.c (gfc_init_options): fshort_enums initialized.
        (gfc_handle_option): fshort_enums is set.
        (target.h): included.
        * parse.c (decode_statement): match ("enum , bind ( c )", gfc_match_enum, ST_ENUM) added.
        match (NULL, gfc_match_enumerator_def, ST_ENUMERATOR) added.
        (gfc_ascii_statement): Added cases ST_ENUM , ST_ENUMERATOR and ST_END_ENUM.
        (parse_enum): New function to parse enum construct.
        (parse_spec): Added case ST_ENUM.
        * parse.h (gfc_compile_state): COMP_ENUM added.
        (gfc_match_enum, gfc_match_enumerator_def, gfc_free_enum_history): Prototype added.
        * symbol.c (gfc_copy_attr): set the enumeration attribute.
        * lang.opt (fshort-enums): option added.