cobol: Development round-up. [PR120765, PR119337, PR120794]

cobol: Development round-up. [PR120765, PR119337, PR120794]

This collection of changes reflects development by both Jim Lowden and Bob
Dubner.  It includes fixes to the cobcd script; refinements to the multiple-
period syntax; changes to the parser; implementation of DISPLAY/ACCEPT to and
from ENVIRONMENT-NAME, ENVIRONMENT-VALUE, ARGUMENT-NUMBER, ARGUMENT-VALUE and
minor changes to genapi.cc to cut down on the number of cppcheck warnings.

Co-authored-by: James K. Lowden <jklowden@cobolworx.com>
Co-authored-by: Robert Dubner <rdubner@symas.com>
gcc/cobol/ChangeLog:

	PR cobol/120765
	PR cobol/119337
	PR cobol/120794
	* Make-lang.in: Take control of the .cc.o rule.
	* cbldiag.h (error_msg_direct): New declaration.
	(gcc_location_dump): Forward declaration.
	(location_dump): Use gcc_location_dump.
	* cdf.y: Change some tokens.
	* gcobc: Change dialect handling.
	* genapi.cc (parser_call_targets_dump): Temporarily remove from service.
	(parser_compile_dcls): Combine temporary arrays.
	(get_binary_value_from_float): Apply const to one parameter.
	(depending_on_value): Localize a boolean variable.
	(normal_normal_compare): Likewise.
	(cobol_compare): Eliminate cppcheck warning.
	(combined_name): Apply const to an input parameter.
	(parser_perform): Apply const to a variable.
	(parser_accept): Improve handling of special_name_t parameter and
	the exception conditions.
	(parser_display): Improve handling of speciat_name_t parameter; use the
	os_filename[] string when appropriate.
	(program_end_stuff): Rename shadowing variable.
	(parser_division): Consolidate temporary char[] arrays.
	(parser_file_start): Apply const to a parameter.
	(inspect_replacing): Likewise.
	(parser_program_hierarchy): Rename shadowing variable.
	(mh_identical): Apply const to parameters.
	(float_type_of): Likewise.
	(picky_memcpy): Likewise.
	(mh_numeric_display): Likewise.
	(mh_little_endian): Likewise.
	(mh_source_is_group): Apply static to a variable it.
	(move_helper): Quiet a cppcheck warning.
	* genapi.h (parser_accept): Add exceptions to declaration.
	(parser_accept_under_discussion): Add declaration.
	(parser_display): Change to std::vector; add exceptions to declaration.
	* lexio.cc (cdf_source_format): Improve source code location handling.
	(source_format_t::infer): Likewise.
	(is_fixed_format): Likewise.
	(is_reference_format): Likewise.
	(left_margin): Likewise.
	(right_margin): Likewise.
	(cobol_set_indicator_column): Likewise.
	(include_debug): Likewise.
	(continues_at): Likewise.
	(indicated): Likewise.
	(check_source_format_directive): Likewise.
	(cdftext::free_form_reference_format): Likewise.
	* parse.y: Tokens; program and function names; DISPLAY and ACCEPT
	handling.
	* parse_ante.h (class tokenset_t): Removed.
	(class current_tokens_t): Removed.
	(field_of): Removed.
	* scan.l: Token handling.
	* scan_ante.h (level_found): Comment.
	* scan_post.h (start_condition_str): Remove cast author_state:.
	* symbols.cc (symbols_update): Change error message.
	(symbol_table_init): Correct and reorder entries.
	(symbol_unresolved_file_key): New function definition.
	(cbl_file_key_t::deforward): Change error message.
	* symbols.h (symbol_unresolved_file_key): New declaration.
	(keyword_tok): New function.
	(redefined_token): New function.
	(class current_tokens_t): New class.
	* symfind.cc (symbol_match): Revise error message.
	* token_names.h: Reorder and change numbers in comments.
	* util.cc (class cdf_directives_t): New class.
	(cobol_set_indicator_column): New function.
	(cdf_source_format): New function.
	(gcc_location_set_impl): Improve column handling in token_location.
	(gcc_location_dump): New function.
	(class temp_loc_t): Modify constructor.
	(error_msg_direct): New function.
	* util.h (class source_format_t): New class.

libgcobol/ChangeLog:

	* libgcobol.cc (__gg__accept_envar): ACCEPT/DISPLAY environment variables.
	(accept_envar): Likewise.
	(default_exception_handler): Refine system log entries.
	(open_syslog): Likewise.
	(__gg__set_env_name): ACCEPT/DISPLAY environment variables.
	(__gg__get_env_name): ACCEPT/DISPLAY environment variables.
	(__gg__get_env_value): ACCEPT/DISPLAY environment variables.
	(__gg__set_env_value): ACCEPT/DISPLAY environment variables.
	(__gg__fprintf_stderr): Adjust __attribute__ for printf.
	(__gg__set_arg_num): ACCEPT/DISPLAY command-line arguments.
	(__gg__accept_arg_value): ACCEPT/DISPLAY command-line arguments.
	(__gg__get_file_descriptor): DISPLAY on os_filename[] /dev device.