cobol: Use cdf namespace in CDF Bison parser output.

	Fixes PR 119215 LTO error by removing enumerated types and other
	names from the global namespace, and by deleting use of YYLTYPE. A
	single location type cbl_loc_t is used by both parsers.

	Also fixes PR 122466 using conditional compilation for non-POSIX
	symbols.

	Require Bison 3.8.2 for C++ output.  The generated C++ uses
	iostreams to format error messages.  The cdf.y file includes the
	iostream header and does not use any GCC header files.

gcc/cobol/ChangeLog:

	* Make-lang.in: Report Bison version.
	* cbldiag.h (defined): Define possibly missing macros.
	(ATTRIBUTE_GCOBOL_DIAG): Define if missing.
	(ATTRIBUTE_PRINTF_1): Same.
	(ATTRIBUTE_PRINTF_3): Same.
	(yyerror): Remove.
	(struct YYLTYPE): Remove.
	(enum cbl_gcobol_feature_t): Relocate from symbols.h.
	(YYLTYPE_IS_DECLARED): Remove.
	(YYLTYPE_IS_TRIVIAL): Remove.
	(cobol_location): Relocate.
	(cobol_gcobol_feature_set): Declare.
	(struct YDFLTYPE): Remove.
	(enum cbl_call_convention_t): Relocate from symbols.h.
	(YDFLTYPE_IS_DECLARED): Remove.
	(YDFLTYPE_IS_TRIVIAL): Remove.
	(current_call_convention): Declare.
	(cdf_push): Declare.
	(cdf_push_call_convention): Declare.
	(cdf_push_current_tokens): Declare.
	(cdf_push_dictionary): Declare.
	(cdf_push_enabled_exceptions): Declare.
	(cdf_push_source_format): Declare.
	(cdf_pop): Declare.
	(cdf_pop_call_convention): Declare.
	(cdf_pop_current_tokens): Declare.
	(cdf_pop_dictionary): Declare.
	(cdf_pop_source_format): Declare.
	(cdf_pop_enabled_exceptions): Declare.
	(current_program_index): Declare.
	(struct cbl_loc_t): Derive from cbl_loc_base_t.
	(struct cbl_loc_base_t): Define.
	(cbl_err): Declare.
	(cbl_errx): Declare.
	(error_msg): Use cbl_loc_t.
	(warn_msg): Same.
	(cbl_unimplemented_at): Same.
	(gcc_location_set): Same.
	* cdf.y: Require Bison 3.8.2 and generate C++ in cdf namespace.
	* cdfval.h (struct YDFLTYPE): Remove.
	(struct cbl_loc_t): Forward declaration.
	(struct cdfval_base_t): User-defined conversion from derived.
	* copybook.h (gcc_assert): Use assert(3) within cdf.y.
	(gcc_unreachable): Declare within cdf.y.
	(class copybook_elem_t): Use cbl_loc_t.
	(CTOUPPER): Use toupper(3) in uppername_t helper.
	(TOUPPER): Same.
	(class copybook_t): Use cbl_loc_t.
	* exceptg.h (struct cbl_label_t): Declare cbl_label_t.
	* gcobc: Support -fno-ec.
	* gcobol.1: Reword -fsyntax-only slightly.
	* genapi.cc (parser_label_label): Use cobol_location().
	* lang.opt: Add comment in re lang.opt.urls.
	* lexio.cc (struct replacing_term_t): Use cbl_loc_t.
	(location_in): Same.
	(parse_copy_directive): Same.
	* lexio.h (struct filespan_t): Same.
	* messages.cc (cbl_message): Same.
	* parse.y: Same, and propagate location variously.
	* parse_ante.h (current_data_section_set): Use cbl_loc_t.
	(namcpy): Same.
	(reject_refmod): Same.
	(require_pointer): Same.
	(require_integer): Same.
	(ast_op): Same.
	(perform_tgt_set): Same.
	(label_add): Same.
	(paragraph_reference): Same.
	(tee_up_name): Same.
	(ast_inspect): Same.
	(ast_enter_section): Same.
	(ast_enter_paragraph): Same.
	(prototype_add): Same.
	(verify_args): Same.
	(subscript_dimension_error): Same.
	(literal_subscripts_valid): Same.
	(literal_refmod_valid): Same.
	(struct cbl_fieldloc_t): Remove.
	(intrinsic_call_1): Use cbl_loc_t.
	(symbol_find): Same.
	(valid_redefine): Same.
	(field_add): Same.
	(field_type_update): Same.
	(field_capacity_error): Same.
	(field_alloc): Same.
	(file_add): Same.
	(alphabet_add): Same.
	(set_real_from_capacity): Same.
	(procedure_division_ready): Same.
	(file_section_fd_set): Same.
	(ast_call): Same.
	(field_binary_usage): Same.
	(ast_end_program): Same.
	(cobol_location): Same.
	(location_set): Same.
	(statement_begin): Same.
	(ast_first_statement): Same.
	* scan.l: Qualify tokens with new cdf namespace.
	* scan_ante.h (ydfparse): Now static.
	(cdf_context): Declare.
	(ydfltype_of): Remove.
	(update_location): Use cbl_loc_t.
	(reset_location): Same.
	(YY_USER_INIT): Same.
	(class picture_t): Same.
	* scan_post.h (ydfparse): Wrapper for cdf_parser::parse() method.
	(ydfchar): Lookahead helper.
	(ydfdebug): Same.
	(run_cdf): Clearer debug messages.
	(struct pending_token_t): Renamed to recent_token_t.
	(struct recent_token_t): As above.
	(PENDING): Renames to RECENT.
	(RECENT): As above.
	(next_token): Removed.
	(recent_tokens_t): Capture abandoned lookahead tokens.
	(prelex): Use recent_tokens queue.
	(yylex): Drop normal parsing idea.
	* symbols.cc (symbol_field_location): Use cbl_loc_t.
	(symbol_alphabet): Same.
	(cbl_alphabet_t::cbl_alphabet_t): Same.
	(cbl_alphabet_t::assign): Same.
	(cbl_alphabet_t::also): Same.
	(symbol_temporary_location): Same.
	(cbl_field_t::encode): Same.
	* symbols.h (enum cbl_gcobol_feature_t): Remove.
	(cobol_gcobol_feature_set): Remove.
	(struct cbl_field_t): Use cbl_loc_t.
	(struct cbl_refer_t): Same.
	(struct cbl_alphabet_t): Same.
	(struct cbl_perform_tgt_t): Same.
	(struct cbl_nameloc_t): Same.
	(class name_queue_t): Same.
	(tee_up_name): Same.
	(symbol_field_location): Same.
	(enum cbl_call_convention_t): Remove
	(class current_tokens_t):  Use cbl_loc_t.
	(current_call_convention): Same.
	(gcc_location_set): Same.
	* util.cc (class cdf_directives_t): Use cbl_loc_t.
	(cdf_unreachable): Define as gcc_unreachable.
	(cdf_literalize): Do not handle location.
	(cdf_file): New function.
	(cdf_file_index): Same.
	(cdf_file_name): Same.
	(cdf_add_field): Same.
	(cbl_field_t::encode_numeric): Remove unused parameter.
	(cbl_field_t::report_invalid_initial_value): Use cbl_loc_t.
	(match_proc): Namespace for local prototype-verification functions.
	(DUMP_PROCEDURE_CALLS): Guard macro for debug function.
	(procedure_calls_dump): New function to show uses of PERFORM.
	(gcc_location_set_impl): Use cbl_loc_t.
	(gcc_location_set): Same.
	(class temp_loc_t): Same.
	(error_msg): Same.
	(warn_msg): Same.
	(ydfdebug): Same.
	(cobol_set_debugging): Same.
	(cbl_unimplemented_at): Same.
	* util.h (cbl_err): Remove declaration.
	(cbl_errx): Same.
	(cdf_push): Same.
	(cdf_push_call_convention): Same.
	(cdf_push_current_tokens): Same.
	(cdf_push_dictionary): Same.
	(cdf_push_enabled_exceptions): Same.
	(cdf_push_source_format): Same.
	(cdf_pop): Same.
	(cdf_pop_call_convention): Same.
	(cdf_pop_current_tokens): Same.
	(cdf_pop_dictionary): Same.
	(cdf_pop_source_format): Same.
	(cdf_pop_enabled_exceptions): Same.

libgcobol/ChangeLog:

	* posix/shim/open.cc (defined): Honor _GNU_SOURCE and _POSIX_C_SOURCE.