cobol: Improved linemap and diagnostic handling; PIC validation. [PR120402]

cobol: Improved linemap and diagnostic handling; PIC validation. [PR120402]

Implementation of PICTURE string validation for PR120402.  Expanded some printf
format attributes.  Improved debugging and diagnostic messages.  Improved
linemap and line location tracking in support of diagnostic messages and
location_t tagging of GENERIC nodes for improved GDB-COBOL performance.
Assorted changes to eliminate cppcheck warnings.

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

	PR cobol/120402
	* Make-lang.in: Elminate commented-out scripting.
	* cbldiag.h (_CBLDIAG_H): Change #if 0 to #if GCOBOL_GETENV
	(warn_msg): Add printf attributes.
	(location_dump): Add debugging message.
	* cdf.y: Improved linemap tracking.
	* genapi.cc (treeplet_fill_source): const attribute for formal parameter.
	(insert_nop): Created to consolidate var_decl_nop writes.
	(build_main_that_calls_something): Move generation to the end of executable.
	(level_88_helper): Formatting.
	(parser_call_targets_dump): Formatting.
	(function_pointer_from_name): const attribute for formal parameter.
	(parser_initialize_programs): const attribute for formal parameter.
	(parser_statement_begin): Improved linemap handling.
	(section_label):  Improved linemap handling.
	(paragraph_label): Improved linemap handling.
	(pseudo_return_pop): Improved linemap handling.
	(leave_procedure): Formatting.
	(parser_enter_section):  Improved linemap handling.
	(parser_enter_paragraph): Improved linemap handling.
	(parser_perform): Formatting.
	(parser_leave_file): Move creation of main() to this routine.
	(parser_enter_program): Move creation of main from here to leave_file.
	(parser_accept): Formatting. const attribute for formal parameter.
	(parser_accept_command_line): const attribute for formal parameter.
	(parser_accept_command_line_count): const attribute for formal parameter.
	(parser_accept_envar): Likewise.
	(parser_set_envar): Likewise.
	(parser_display): Likewise.
	(get_exhibit_name): Implement EXHIBIT verb.
	(parser_exhibit): Likewise.
	(parser_sleep): const attribute for formal parameter.
	(parser_division): Improved linemap handling.
	(parser_classify): const attribute for formal parameter.
	(create_iline_address_pairs): Improved linemap handling.
	(parser_perform_start): Likewise.
	(perform_inline_until): Likewise.
	(perform_inline_testbefore_varying): Likewise.
	(parser_perform_until): Likewise.
	(parser_perform_inline_times): Likewise.
	(parser_intrinsic_subst): const attribute for formal parameter.
	(parser_file_merge): Formatting.
	(create_and_call): Improved linemap handling.
	(mh_identical): const attribute for formal parameter.
	(mh_numeric_display): const attribute for formal parameter.
	(mh_little_endian): Likewise.
	(mh_source_is_group): Likewise.
	(psa_FldLiteralA): Formatting.
	* genapi.h (parser_accept): const attribute for formal parameter.
	(parser_accept_envar): Likewise.
	(parser_set_envar): Likewise.
	(parser_accept_command_line): Likewise.
	(parser_accept_command_line_count): Likewise.
	(parser_add): Likewise.
	(parser_classify): Likewise.
	(parser_sleep): Likewise.
	(parser_exhibit): Likewise.
	(parser_display): Likewise.
	(parser_initialize_programs): Likewise.
	(parser_intrinsic_subst): Likewise.
	* gengen.cc (gg_assign): Improved linemap handling.
	(gg_add_field_to_structure): Likewise.
	(gg_define_from_declaration): Likewise.
	(gg_build_relational_expression): Likewise.
	(gg_goto_label_decl): Likewise.
	(gg_goto): Likewise.
	(gg_printf): Likewise.
	(gg_fprintf): Likewise.
	(gg_memset): Likewise.
	(gg_memchr): Likewise.
	(gg_memcpy): Likewise.
	(gg_memmove): Likewise.
	(gg_strcpy): Likewise.
	(gg_strcmp): Likewise.
	(gg_strncmp): Likewise.
	(gg_return): Likewise.
	(chain_parameter_to_function): Likewise.
	(gg_define_function): Likewise.
	(gg_get_function_decl): Likewise.
	(gg_call_expr): Likewise.
	(gg_call): Likewise.
	(gg_call_expr_list): Likewise.
	(gg_exit): Likewise.
	(gg_abort): Likewise.
	(gg_strlen): Likewise.
	(gg_strdup): Likewise.
	(gg_malloc): Likewise.
	(gg_realloc): Likewise.
	(gg_free): Likewise.
	(gg_set_current_line_number): Likewise.
	(gg_get_current_line_number): Likewise.
	(gg_insert_into_assembler): Likewise.
	(token_location_override): Likewise.
	(gg_token_location): Likewise.
	* gengen.h (location_from_lineno): Likewise.
	(gg_set_current_line_number): Likewise.
	(gg_get_current_line_number): Likewise.
	(gg_token_location): Likewise.
	(current_token_location): Likewise.
	(current_location_minus_one): Likewise.
	(current_location_minus_one_clear): Likewise.
	(token_location_override): Likewise.
	* genmath.cc (fast_divide):  const attribute for formal parameter.
	* genutil.cc (get_and_check_refstart_and_reflen): Likewise.
	(get_data_offset): Likewise.
	(refer_refmod_length): Likewise.
	(refer_offset): Likewise.
	(refer_size): Likewise.
	(refer_size_dest): Likewise.
	(refer_size_source): Likewise.
	(qualified_data_location): Likewise.
	* genutil.h (refer_offset): Likewise.
	(refer_size_source): Likewise.
	(refer_size_dest): Likewise.
	(qualified_data_location): Likewise.
	* parse.y: EVALUATE token; Implement EXHIBIT verb;
	Improved linemap handling.
	* parse_ante.h (input_file_status_notify): Improved linemap handling.
	(location_set): Likewise.
	* scan.l: PICTURE string validation.
	* scan_ante.h (class picture_t): PICTURE string validation.
	(validate_picture): Likewise.
	* symbols.cc (symbol_currency): Revised default currency handling.
	* symbols.h (symbol_currency): Likewise.
	* util.cc (location_from_lineno): Improved linemap handling.
	(current_token_location): Improved linemap handling.
	(current_location_minus_one): Improved linemap handling.
	(current_location_minus_one_clear): Improved linemap handling.
	(gcc_location_set_impl): Improved linemap handling.
	(warn_msg): Improved linemap handling.
	* util.h (cobol_lineno): Improved linemap handling.