2021-10-27         Arnold D. Robbins     <arnold@skeeve.com>

	* 5.1.1: Release tar ball made.

2021-10-24         Arnold D. Robbins     <arnold@skeeve.com>

	* README: Updated.

2021-10-20         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* msg.c (err): Need to check that FNR_node->var_value is non-NULL
	before testing with is_mpg_number.

2021-10-18         Arnold D. Robbins     <arnold@skeeve.com>

	Factor duplicated code out into a separate function.
	D.R.Y. principle.

	* symbol.c (get_name_from_awk_ns): New function.
	(lookup): Use it.
	(install): Use it.

	* awkgram.y (check_qualified_special): Use awk_namespace instead of a
	string constant.
	* profile.c (pprint): Ditto.
	(adjust_namespace): Ditto. Also, fix the check for the qualified
	name to look for the "::" in case one namespace is a prefix of
	another.

2021-10-13         Arnold D. Robbins     <arnold@skeeve.com>

	* README: Update version, copyright year.
	* custom.h: Update copyright year.

2021-09-26         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_mktime): Update that ISO 8601 does not allow
	hours > 23. Thanks to Nethox <nethox+awk@gmail.com> for the info.

2021-09-23         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h: Some clean-up of comments in the header file.

2021-09-12         Arnold D. Robbins     <arnold@skeeve.com>

	* interpret.h: Remove subscript_in_array variable.

	Unrelated:

	* builtin.c (add_thousands): Fix insertion of thousands_sep
	string. Do it in reverse order.

2021-09-10         Arnold D. Robbins     <arnold@skeeve.com>

	* interpret.h: For Op_subscript, don't allow references into
	FUNCTAB and SYMTAB to create new elements.  Thanks to
	Jason C. Kwan <jasonckwan@yahoo.com> for the bug report.

	Unrelated:

	* aclocal.m4: Regenerated: Automake 1.16.4.
	* NEWS: Updated.

	Unrelated:

	* awkgram.y (YYERROR_IS_DECLARED): Added for Bison 3.8.
	* command.y (YYERROR_IS_DECLARED): Ditto.
	* NEWS: Updated.

2021-09-09         Arnold D. Robbins     <arnold@skeeve.com>

	Move to Autoconf 2.71 (finally!)

	* configure.ac: Updated.
	* aclocal.m4, configh.in configure: Regenerated.
	* NEWS: Updated.

2021-09-06         Arnold D. Robbins     <arnold@skeeve.com>

	Have the ' flag work for %d in MPFR mode also. Thanks to
	Dan Nielsen <catskill549@yahoo.com> for the report.

	* builtin.c (add_thousands):  New function.
	(reverse): New helper function.
	(format_tree): Use add_thousands if MPFR and an integer
	format.

2021-09-03         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (UPDATE_YEAR): Update to 2021.

2021-08-18         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (main): Change have_srcfile from int to bool.

2021-08-15         Arnold D. Robbins     <arnold@skeeve.com>

	Allow setting AR and ARFLAGS on the configure command line.
	Thanks to Jacob Burkholder <jake.burkholder2@gmail.com> for
	the report.

	* configure.ac (AR_FLAGS): Provide default value.
	(AR): Call AC_SUBST on it.

2021-08-13         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (do_sub): Rationalize handling of strongly typed
	regex as argument to sub/gsub, as well as rationalize the return
	value from gensub to always be string. Thanks to John Naman
	<gawker@703n.com> for the bug report.

2021-08-05         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* mpfr.c (do_mpfr_func): New argument, warn_negative. If true,
	print a warning message about a negative argument. Bring -M
	code into line with regular code. Bug report from Neil Ormos
	in the help-gawk list.

	Unrelated:

	* mpfr.c (do_mpfr_int_div, mpg_div, mpg_mod): If dividing by
	zero, print a fatal error messages. Brings MPFR code into line
	with the regular code. Thanks to Peng Yu for noticing the bug, in
	the help-gawk list.

2021-07-23         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (exec_count_t): Add typedef for Vax VMS C and everyone else.
	(EXEC_COUNT_FMT, EXEC_COUNT_PROFILE_FMT): Corresponding format
	strings for printf.
	* debug.c (print_instruction): Use EXEC_COUNT_FMT.
	* profile.c (indent): Ditto and use EXEC_COUNT_PROFILE_FMT.

2021-07-07         Arnold D. Robbins     <arnold@skeeve.com>

	* array.c (asort_actual): Add a lint warning for passing the
	same array as the first two arguments without a third.
	Thanks to Peng Yu <pengyu.ut@gmail.com> for the report.

2021-06-30         Arnold D. Robbins     <arnold@skeeve.com>

	* custom.h: Add a bunch of defines to work around the continous,
	needless churn in support/dfa.c.

2021-06-04         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (format_tree): In MPFR prints, cast values to
	int for proper int vs. unsigned comparison. Fixes things
	for HP-UX. Thanks to Daniel Richard G. for the report.

2021-05-21         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c: For z/OS, use %#p to print pointers, %p everything else.

2021-05-13         Arnold D. Robbins     <arnold@skeeve.com>

	* custom.h: For z/OS, define _REGEX_INCLUDE_LIMITS_H.
	* profile.c (pprint): Add a diagnostic print for an
	unexprected node type.

2021-05-05         Arnold D. Robbins     <arnold@skeeve.com>

	Move to Automake 1.16.3.

	* configure.ac (AM_INIT_AUTOMAKE): Add subdir-objects option.
	* NEWS: Updated.

	Get `make distcheck' working again:

	* Makefile.am (EXTRA_DIST): Remove files that are now in build-aux.

2021-04-16         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c (arg_assign): For -v '@/...' make sure that there are
	at least three characters there. Thanks to Ed Morton
	<mortoneccc@comcast.net> for the report.

2021-04-14         Arnold D. Robbins     <arnold@skeeve.com>

	Fix up lint warnings for "no effect" to avoid false warnings.
	Straighten out the messages, and remove the run-time warning,
	since a parse-time warning is already issued. Thanks to
	Arkadiusz Drabczyk <arkadiusz@drabczyk.org> for the initial
	bug report.

	* awkgram.y (isnoeffect): Add more opcodes that are "no effect".
	(add_lint): For LINT_no_effect, check that all the opcodes in the
	list are "no effect". Only if so, issue the warning. Remove the
	addition of the run-time warning.
	* interpret.h (r_interpret): Remove LINT_no_effect from Op_lint
	case.

2021-02-13         Arnold D. Robbins     <arnold@skeeve.com>

	* io.c (nextfile): Use the value of ARGC directly in the for
	loop, in case it gets changed by code or by a command line
	assignment. Thanks to the discussion in comp.lang.awk for
	the report.

2021-01-28         Arnold D. Robbins     <arnold@skeeve.com>

	Fix a Day One Bug!

	* main.c (main): For -b option, only set LC_ALL to C if
	not --posix. Ooops.

2021-01-09         Arnold D. Robbins     <arnold@skeeve.com>

	Fix problems turning something like 018 into decimal.
	Thanks to Arkadiusz Drabczyk <arkadiusz@drabczyk.org> and to
	Jean-Philippe Guérard <jean-philippe.guerard@xn--tigreray-i1a.org>
	for the reports.

	* builtin.c (nondec2awknum): Use a copy of len, in case we detect
	8 or 9 and have to restart as decimal.
	* mpfr.c (mpg_strtoui): For 8 or 9, set base to 10.

	Unrelated:
	* array.c, awk.h, awkgram., builtin.c, cmd.h, command.y, debug.c,
	eval.c, gawk.api.c, gawkapi.h, interpret.h, io.c, main.c, mfpr.c,
	node.c, profile.c, re.c: Update copyright year.

2021-01-08         Arnold D. Robbins     <arnold@skeeve.com>

	General tightening up use of const and types. Thanks to
	the C++ porting experiment.

	* array.c (null_array): Separate out multiple assignment of zero.
	* awk.h: Add <math.h> here and pull it out of individual files.
	(CONVFMT): Make const char *.
	(quote): Make const char *.
	(defpath): Make const char *.
	(deflibpath): Make const char *.
	(envsep): Make const char *.
	(DO_FLAG_NONE): New zero enum value.
	(getblock): Add a cast to the ty argument.
	(make_regnode): First argument is now NODETYPE.
	(gawk_name): Returns const char *.
	* awkgram.y: Include argument types in read_func pointer.
	(make_regnode): First argument is now NODETYPE.
	* builtin.c (do_typeof): Use const char *.
	(format_nan_inf): Move declaration of val to top of function.
	* cmd.h (dbg_prompt, commands_prompt, eval_prompt, dgawk_prompt):
	Make const char *.
	(struct cmd_token): Use const char *. Rename `class' to `lex_class'.
	* command.y (lex_class): Update all uses.
	(find_command): Use const char *.
	* debug.c (dbg_prompt, commands_prompt, eval_prompt, dgawk_prompt,
	output_file): Make const char *.
	(struct dbg_option): Use const char *.
	(do_info): Use const char *. Cast stop.command to enum argtype.
	(do_finish): Cast stop.command to enum argtype.
	(do_return, do_until): Ditto.
	(print_instruction, set_gawk_output, set_prompt): Add casts to
	some function parameters.
	* eval.c (update_ERRNO_int): Use const char *.
	* gawk.api.c (valtype2str): Return const char *.
	(api_get_argument): Use awk_true instead of true in return statements.
	(awk_value_to_node): Move declaration of tval to top of function.
	(api_release): Cast a_cookie to NODE *.
	* gawkapi.h (struct awk_input): Include argument types in
	read_func pointer.
	* interpret.h (r_interpret): Add cast to argument in call to
	do_getline_redir.
	* io.c (read_with_timeout): Change second param to void * from char *.
	(redirect_string): Add casts to function call parameters.
	(path_info): Use const char *.
	(init_awkpath): Ditto.
	* main.c (CONVFMT, locale_dir): Now const char *.
	(do_flags): Init to DO_FLAG_NONE instead of zero.
	* mfpr.c (get_rnd_mode): Add cast to return value.
	(set_round_mode): Add cast to assignment of rndm.
	(do_mpfr_func): Include argument types in type of second parameter.
	* node.c (r_make_number): Remove declaration of strtod.
	* profile.c (pp_push): Add cast in assignment to n->type. Use
	const char * for `pre' at Op_func_call.
	* re.c (check_bracket_exp): Add cast to return from memchr.

2021-01-07         Arnold D. Robbins     <arnold@skeeve.com>

	* builtin.c (format_tree): Generalize handling of invalid
	format modifiers. Add support for three more letters. Thanks to
	Arkadiusz Drabczyk <arkadiusz@drabczyk.org> for the report.

	Unrelated:

	* io.c (rsnullscan): Adjust loop test to get to end of string
	when re match is null string. Thanks to Ed Morton
	<mortoneccc@comcast.net> for the report.

2020-12-26         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Updated.

2020-12-20         Arnold D. Robbins     <arnold@skeeve.com>

	Second steps fixing +inform, +nancy, for MPFR.

	* builtin.c (format_nan_inf): Use mpfr_signbit instead of mpfr_sgn.
	* mpfr.c (force_mpnum): Check for NaN and leading minus and if so
	set the signbit with mpfr_setsign.
	(mpg_force_number): Copy in code from f_force_number to check
	properly for +inf, +nan.

2020-12-19         Arnold D. Robbins     <arnold@skeeve.com>

	First steps fixing +inform, +nancy. Sigh.

	* awk.h (is_ieee_magic_val): Add declaration.
	* node.c (is_ieee_magic_val): Make extern, not static.
	(r_force_number): Make the check smarter, catch -nan.

2020-11-02         Arnold D. Robbins     <arnold@skeeve.com>

	* re.c (make_regexp): Cast len parameter to int to avoid
	compiler warnings.

2020-10-31         Arnold D. Robbins     <arnold@skeeve.com>

	* re.c (make_regexp): When re_compile_pattern fails, use the
	original text of the regexp in the error message. Thanks to Neil
	R. Ormos <ormos-gnulists17@ormos.org> for the report.

2020-10-29         Arnold D. Robbins     <arnold@skeeve.com>

	* eval.c (setup_frame): Handle the case of values from FUNCTAB.
	Thanks to Denis Shirokov <cosmogen@gmail.com> for the report.

2020-10-12         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.c (api_lintwarn): Fix comparison, should be to check
	lintfunc, not lintwarn. Thanks to OLLIER Jean-François
	<lalanne.51@wanadoo.fr>, reported 23 March, 2014.

2020-10-11         Arnold D. Robbins     <arnold@skeeve.com>

	* re.c (make_regexp): Add {} to characters that cause rp->maybe_long
	to be true.
	* io.c (rsrescan): Update comment for step 4.

2020-09-21         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (enum redirect_flags): Add RED_NONE.
	(redirect_flags_t): New typedef.
	* io.c (redflags2str): Handle RED_NONE.
	(check_duplicated_redirections): New function.
	(redirect_string): Use new typedef. Call new function if do_lint
	instead of using inline code.
	(close_redir): Add error message for failure on close of two-way pipe.

2020-09-04         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y [GRAMMAR]: Install arrays as Node_var_array. Improves
	PROCINFO["identifiers"]. Thanks to anoncoward@nym.hush.com
	for the report.

2020-08-25         Arnold D. Robbins     <arnold@skeeve.com>

	* interpret.h (r_interpret): At Op_rule, check if in BEGINFILE. If so,
	clear the record.  Fixes an issue reported by Pat Rankin in May, 2011.

2020-08-24         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y, builtin.c, command.y, debug.c, gawkapi.c,
	io.c, node.c: Make all messages consistent: Remove final periods
	from messages that had them.
	* TODO: Updated.

2020-08-20         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h (NODE): Move valref completely out of the union. Fixes
	core dumps on old GCC on CentOS 7.

2020-08-13         Arnold D. Robbins     <arnold@skeeve.com>

	Fix TIDYMEM / use of mtrace.

	* configure.ac: Add mtrace to list of functions searched for.
	* symbol.c (make_symbol): Set valref to 1. Allows the
	release_all_vars function to work.

	Unrelated:

	* array.c (value_info): Spell ROUNDMODE correctly in output.
	* mpfr.c (set_ROUNDMODE): Ditto.

2020-08-12         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.c, command.c: Regenerated with Bison 3.7.1.
	* NEWS: Updated.

	Unrelated:

	* profile.c (pp_namespace): Always print a newline before the
	@namespace, in case it comes after a comment. Thanks to J Naman
	for the report.
	* symbol.c (comp_symbol): Adjust comparison so that names in the
	awk namespace come out first. Makes the order of functions in
	pretty-printed output more sane. Thanks also to J Naman for
	getting me to explore this issue.

2020-07-29         Arnold D. Robbins     <arnold@skeeve.com>

	* custom.h (FLEXIBLE_ARRAY_MEMBER): Define to 1 for dfa.h.

2020-07-28         Arnold D. Robbins     <arnold@skeeve.com>

	Eliminate 'iszero: redefined' warning from tcc.

	* awk.h (is_zero): Renamed from `iszero'.
	(boolval): Update usage.
	* awkgram.y [GRAMMAR]: Ditto.
	(negate_num): Ditto.
	* debug.c (condition_triggered): Ditto.
	* eval.c (set_LINT): Ditto.

2020-07-26         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.c, command.c: Regenerated with Bison 3.7.
	* NEWS: Updated.

	Unrelated:

	* gawkapi.h (api_get_mpfr, api_get_mpz): Mark as obsolete.

2020-07-22         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.in: Regenerated.

2020-07-21         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac (AM_INIT_AUTOMAKE): Update to 1.16.
	* ar-lib, compile, config.guess, config.rpath, config.sub,
	depcomp, install-sh, missing, ylwrap: Moved to build-aux.

2020-07-20  gettextize  <bug-gnu-gettext@gnu.org>

	* configure.ac (AM_GNU_GETTEXT_VERSION): Bump to 0.20.2.

2020-07-19         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Fix title on leading set of changes. Thanks to
	Marcus <marcuscruse@ya.ru> for the report.

	Unrelated: Bump minor API version since semantics have changed.

	* gawkapi.h (api_minor_version): Increase to 1.

	Unrelated: Fix a spelling error in a comment.

	* mpfr.c (force_mpnum): Fix a typo.

2020-07-17         Arnold D. Robbins     <arnold@skeeve.com>

	* gawkapi.h (gawk_api_minor_version): Increase, since the
	MPFR/MPZ stuff changed some.  Remains source and binary
	compatible, but semantics are different.

2020-07-15         Arnold D. Robbins     <arnold@skeeve.com>

	Finish cleaning up MPFR valgrind issues.

	* awk.h (struct block_header): Remove MPFR and GMP enums.
	* gawkapi.c (getmpfr, freempfr, getmpz, freempz): Removed
	(api_get_mpfr): Use emalloc instead of getmpfr.
	(api_get_mpz): Use emalloc instead of getmpz.
	* gawkapi.h: Add comments on MPFR and MPZ
	(make_number_mpfr, make_number_mpz): Update comments.
	* node.c (nextfree): Remove mpfr and mpz entries.
	* NEWS: Updated.

	Unrelated:

	* config.guess, config.sub: Updated from GNULIB.

2020-07-13         Arnold D. Robbins     <arnold@skeeve.com>

	* mpfr.c (mpg_interpret): Small speedup. If do_itrace and opcode is
	not one that's handled, return early.

2020-07-12         Arnold D. Robbins     <arnold@skeeve.com>

	* mpfr.c (mpg_interpret): Make the instruction tracing more sane.

	Fix the testext test for MPFR.

	* gawkapi.c (awk_value_to_node): Use correct code to copy
	MPFR/MPN numbers and don't free the original values.
	* interpret.h (r_interpret): At Op_ext_builtin, separate out calls
	to the external function and awk_value_to_node, for ease in a
	debugger.
	* NEWS: Updated.

2020-07-10         Arnold D. Robbins     <arnold@skeeve.com>
	
	Fix printf issues. Thanks to Michal Jaegermann for the report.

	* cint_array.c (cint_dump): Fix printf formats.
	* debug.c (print_symbol): Ditto.
	* mpfr.c (mpg_interpret): Ditto.

2020-07-09         Arnold D. Robbins     <arnold@skeeve.com>

	Fix dbugeval2 test for MPFR.

	* debug.c (do_eval): Preserve DO_MPFR flag in do_flags before
	parsing the string to be evaluated.

	Fix indirect call tests for MPFR:

	* awkgram.y (lookup_builtin): Only return the MPFR builtin
	function if the pointer is not NULL.

	Unrelated:

	* config.guess, config.sub: Updated from GNULIB.

2020-07-08         Arnold D. Robbins     <arnold@skeeve.com>

	* str_array.c (str_lookup): If a pure number, copy to a string. Fixes
	the printfchar test for MPFR.

	Fix typedregex2 and typedregex3 tests for MPFR:

	* mpfr.c (mpg_zero): No longer static inline.
	(force_mpnum): Handle the case of a strongly typed regex.
	(mpg_interpret): Add tracing for do_itrace.
	* awk.h (mpg_zero): Add declaration.
	* node.c (make_typed_regex): Init to zero for MPFR via mpg_zero.

2020-07-07         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h: Turn all the flag defines into enums. GDB can then show
	the bit maps directly.

	Unrelated: Fix another MPFR bug, reported by Hyunho Cho
	<mug896@naver.com>.

	* mpfr.c (force_mpnum): Restore the character at the end of
	the string if only saw + or -.

2020-07-07         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* node.c (r_dupnode): Sanitize the code, particularly for MPFR.

2020-07-05         Arnold D. Robbins     <arnold@skeeve.com>

	Bug fixes in MPFR, reported by Hyunho Cho<mug896@naver.com>.

	* node.c (r_dupnode): Set strndmode and also set stlen of new
	string. (How did that one get by us for so long?)
	* mpfr.c (force_mpnum): Check for a + or - sign with nothing following it.

	Unrelated. Make do_itrace a real variable so that it's easier to
	change the value from a debugger.

	* awk.h (do_itrace): Declare.
	(DO_ITRACE, do_itrace): Remove macros.
	* main.c (do_itrace): Define.
	(parse_args): Set do_itrace.

2020-07-03         Arnold D. Robbins     <arnold@skeeve.com>

	Fix a double free error with -M.  Thanks to
	"NIDE, Naoyuki" <nide@ics.nara-wu.ac.jp> for the report.

	* field.c (clear_mpfr):  New macro, clears MPFR and NUMCUR bits.
	(reset_record): Use it on the newly copied field values.
	(purge_record): Add introductory comment since we're in the file.

2020-07-01         Arnold D. Robbins     <arnold@skeeve.com>

	* eval.c (posix_compare): Rewrite contributed by
	Michael Builov <mbuilov@gmail.com>.

	Unrelated:

	* awk.h: New option: do_itrace.
	* interpret.h (r_interpret): Print instruction trace if enabled.
	* main.c (optab): New option: -I/--trace.
	(parse_args): Update optlist and the code to handle it.
	* NEWS: Updated.

2020-06-29         Arnold D. Robbins     <arnold@skeeve.com>

	* debug.c: Cleanup messages. Error messages start with lower
	case letter.
	* TODO: Updated.

2020-06-14         Arnold D. Robbins     <arnold@skeeve.com>

	Disallow SYMTAB and FUNCTAB as destination arguments to builtin
	functions that clear arrays:

	* awk.h (check_symtab_functab): Add declaration.
	* array.c (asort_actual): Call it in check for second argument.
	* builtin.c (check_symtab_functab): New function.
	(do_match): Call it in check for third argument.
	* field.c (do_patsplit, do_split): Call it in checks for fourth and
	second arguments.

2020-06-12         Arnold D. Robbins     <arnold@skeeve.com>

	* array.c (asort_actual): If SYMTAB or FUNCTAB is the second argument,
	fatal out.   If they are the first argument, make it work when a
	second argument is supplied.
	* TODO, NEWS: Updated.

2020-06-10         Arnold D. Robbins     <arnold@skeeve.com>

	More miscellaneous fixes from Michael Builov <mbuilov@gmail.com>.

	* node.c (r_unref): Handle GAWKDEBUG same as in awk.h:unref.
	(parse_escape): isxdigit/isdigit/isupper called with possible negative
	int: fixed. Dead code under "if (do_lint && j > 2)" eliminated,
	j cannot be > 2.
	(init_btowc_cache): Also initialize wide-char at index 255.

	And so that `make check' passes with GAWKDEBUG defined:

	* msg.c (err): Remove abort() call if fatal. Didn't really do
	anything special for us.

2020-06-10         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.c, command.c: Regenerated with bison 3.6.3.
	* NEWS: Updated.

2020-06-10         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	Convert exec_count from long long to unsigned long long.
	* awk.h (INSTRUCTION): Change ldl type from long long to unsigned
	long long.
	* debug.c (print_instruction): Fix printf format for exec_count.
	* profile.c (indent): The argument is now an unsigned long long,
	and fix the printf format to match.

2020-06-10         Arnold D. Robbins     <arnold@skeeve.com>

	Miscellaneous fixes from Michael Builov <mbuilov@gmail.com>.

	* awkgram.y (rule_block): Fix size declaration
	(parse_program): Adjust memset call.
	(get_comment): Check for end of file before checking for space.
	* io.c (gawk_popen): Move os_close_on_exec call inside #endif.
	* builtin.c (do_bindtextdomain): Don't pass NULL to strlen.
	* debug.c (set_breakpoint): Don't dereference NULL pointer in D_func.
	(serialize_list): Get the buffer management right to avoid overrun.

2020-06-10         Arnold D. Robbins     <arnold@skeeve.com>

	Thanks to Andrew Schorr for suggesting a better way to
	handle exec_count being a long long.

	* awk.h (INSTRUCTION): Make new ldl member be the long long.
	(exec_count): Is now ldl.
	* profile.c (pprint): Fix printf of exec_count.

2020-06-09         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y (tokexpand): Use size_t instead of int for size of
	buffer.

2020-06-08         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: Fix `print $"2"' case. Thanks to Ed Morton
	<mortoneccc@comcast.net> for the report.

	Unrelated:

	* awk.h (INSTRUCTION): Make dl a long long for profiling
	counts on 32 bit systems. Thanks to Peter Lindgren
	for the report.
	* profile.c (indent): Take a long long parameter and fix
	the printf format.

2020-06-05         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: Allow @/foo/ as return expression in a function.
	Oops.

2020-06-05         Arnold D. Robbins     <arnold@skeeve.com>

	* configure.ac: Add call to AM_PROG_AR for use in
	cross compiles.  Thanks to Sergei Trofimovich <slyfox@gentoo.org>
	for the patch.

2020-05-15         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub: Updated from GNULIB.

2020-05-14         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.c, command.c: Rebuild with Bison 3.6.
	* NEWS: Updated.

2020-05-06         Arnold D. Robbins     <arnold@skeeve.com>

	Add lint check for string + string. It's not concatenation
	in awk, but is in most other languages. Thanks to Roland Illig
	<roland.illig@gmx.de> for the suggestion.

	* awk.h (Op_lint_plus): New opcode.
	* awkgram.y (mk_binary): Add it into the list in the right place
	if do_lint.
	* eval.c (optypes): Add case for Op_lint_plus.
	* interpret.h (r_interpret): Ditto.

2020-04-14         Arnold D. Robbins     <arnold@skeeve.com>

	* 5.1.0: Release tar ball made.

2020-04-10         Arnold D. Robbins     <arnold@skeeve.com>

	* field.c (save_FPAT): New global variable.
	(get_field): Check if using FPAT or not in order to pass in
	the right variables to parse_field function.  Fixes bug in
	delayed field parsing when using FPAT.  Thanks to
	luciole75w <luciole75w@gmail.com> for the bug report.
	(set_FPAT): Use global save_FPAT instead of local save_fpat.

	Unrelated:

	* awkgram.c, command.c: Rebuild with Bison 3.5.4.
	* NEWS: Updated.

	Unrelated:

	* awk.h (do_lint_extensions): Define to zero if NO_LINT.

2020-04-02         Arnold D. Robbins     <arnold@skeeve.com>

	* field.c (re_parse_field): If default parsing and trailing
	whitespace, don't set a null field at the end. Thanks to
	Ed Morton <mortoneccc@comcast.net> for the report.

2020-03-18         Arnold D. Robbins     <arnold@skeeve.com>

	* TODO: Add more stuff.

2020-03-15         Arnold D. Robbins     <arnold@skeeve.com>

	* Makefile.am (zos-diffout): New target.
	* awkgram.y, command.y: Upgrade to Bison 3.5.3.
	* NEWS: Updated.

2020-03-11         Arnold D. Robbins     <arnold@skeeve.com>

	* main.c: Further message update. Thanks again to
	Roland Illig <roland.illig@gmx.de>.

2020-03-09         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* array.c (sort_up_value_string): If either arg is not a Node_val,
	call out to sort_up_value_type instead. If cmp_strings returns zero,
	fall back to sort_up_index_string as a tie-breaker.
	(sort_up_value_number): If either arg is not a Node_val, call out to
	sort_up_value_type instead. If cmp_strings returns zero, fall back
	to sort_up_index_string as a tie-breaker.
	(do_sort_up_value_type): Renamed from sort_up_value_type with one
	change: if both arguments have type Node_var, we compare the
	var_value NODEs instead.
	(sort_up_value_type): New wrapper function around do_sort_up_value_type
	to fall back to sort_up_index_string as a tie-breaker.

2020-03-09         Arnold D. Robbins     <arnold@skeeve.com>

	* array.c, awk.h, awkgram.y, builtin.c, command.y, debug.c,
	ext.c, int_array.c, io.c, main.c, symbol.c: Messages refined
	based on suggestions from Roland Illig <roland.illig@gmx.de>.

2020-03-06         Jannick               <thirdedition@gmx.net>

	* Makefile.am: Replace AM_MAKEFLAGS with AM_CFLAGS and AM_LDFLAGS.
	Put pc/Makefile.tst into BUILT_SOURCES, instead of in dist-hook.
	Add $(srcdir) to rules for the yacc files. Use AM_LDFLAGS in
	the efence rule.
	* configure.ac: Use GAWK_CANONICAL_HOST instead of AC_CANONICAL_HOST;
	this supplies MSYS2 support. Remove use of EXEEXT.

2020-03-04         Arnold D. Robbins     <arnold@skeeve.com>

	* NEWS: Updated.

2020-02-13         John E. Malmberg      <wb8tyw@qsl.net>

	* custom.h: OpenVMS needs _REGEX_INCLUDE_LIMITS_H defined.

2020-02-09         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y: Add lint check for assignment in condition to
	if and for statements. Thanks to Jannick <thirdedition@gmx.net>
	for the suggestion.
	* debug.c (do_eval): Remove @eval from the symbol table if there
	was a syntax error in the statement being evaluated. Thanks again
	to Jannick, for the report.

2020-02-04         John E. Malmberg      <wb8tyw@qsl.net>

	* custom.h: Fix OpenVMS SIZE_MAX value.

2020-02-01         Arnold D. Robbins     <arnold@skeeve.com>

	* awk.h, dfa.c: Move include of mbsupport.h to ...
	* custom.h: ... here.
	* configure.ac: Add check for isblank.

2020-01-27         Arnold D. Robbins     <arnold@skeeve.com>

	* custom.h: Fix non-VMS compilation.

2020-01-26         John E. Malmberg      <wb8tyw@qsl.net>

	* custom.h: Additional OpenVMS typedefs needed.
	* gettext.h: Fix macro for implementations without gettext
	to not force the result to be a const char *.

2020-01-26         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* array.c (sort_up_value_type): Small efficiency tweak. Only
	run through the list of other types if both values are not scalars.

2020-01-24         Arnold D. Robbins     <arnold@skeeve.com>

	* array.c, profile.c, cint_array.c, builtin.c, interpret.h,
	main.c: Update copyright years.

2020-01-23         Arnold D. Robbins     <arnold@skeeve.com>

	* array.c (sort_up_value_type): Handle other types of nodes,
	in case someone applies PROCINFO["sorted_in"] to SYMTAB or
	FUNCTAB. This threw an assertion error if assertions were
	enabled. Thanks to John Namam <gawker@703n.com> for the report.
	(asort_actual): Disallow SYMTAB and FUNCTAB as first arguments.
	* TODO: Note that we should should eventually allow SYMTAB/FUNCTAB
	passed to asort/asorti if a destination array is provided. (The
	current code breaks right now.)

2020-01-19         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pp_top): New macro.
	(pprint): Be smarter for print[f] with redirection that was
	parenthesized, to not print `printf(("hello\n")) > "..."'.

	Unrelated:
	* compile, config.guess, config.rpath, config.sub, depcomp: Updated
	from GNULIB.

2020-01-14         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* cint_array.c (cint_array_init): Fix off-by-one error in array 
	bounds overflow check for an NHAT value set in the environment.
	Thanks to Michael Builov <mbuilov@gmail.com> for the report.

2020-01-08         Arnold D. Robbins     <arnold@skeeve.com>

	Fix a number of subtle memory leaks. Thanks to the
	combination of MEMDEBUG and valgrind for finding them.

	* builtin.c (do_print): Unref tmp if force_string_ofmt
	returned something different.
	(call_sub, call_match, call_split_func): Free any
	created regexp.
	* debug.c (do_eval): Free the node holding the @eval function
	when done with it.
	* field.c (init_fields): Create fields_arr[0] and Nnull_field
	in a rational fashion.
	* interpret.h (Op_assign_concat): Handle newly created node
	better.

	Unrelated:

	* interpret.h (Op_subscript): When retrieving from SYMTAB, check
	for Node_var_new; variables can exist but have not been assigned
	a value. Thanks to Denis Shirokov <cosmogen@gmail.com> for the report.

	Unrelated:

	* builtin.c (do_typeof): Handle Node_array_ref also. Thanks to
	Denis Shirokov <cosmogen@gmail.com> for the report.

2019-12-22         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess: Updated from GNULIB.

2019-12-22         Jannick               <thirdedition@gmx.net>

	* configure.ac: Hardcode the shared object extension to dll
	on Windows platforms, i.e.whenever EXEEXT is '.exe'.

2019-12-22         Arnold D. Robbins     <arnold@skeeve.com>

	* gettext.h: Update from gettext 0.20.1.
	* NEWS: Updated.

2019-12-18  Paul Eggert  <eggert@Penguin.CS.UCLA.EDU>

	Fix memcpy issue found by -fsanitize=undefined
	* field.c (set_record): Don't memcpy (databuf, NULL, 0),
	as the C standard says the resulting behavior is undefined.

2019-12-16         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y, command.y: Upgrade to Bison 3.5.
	* NEWS: Updated.

2019-11-21         Arnold D. Robbins     <arnold@skeeve.com>

	* config.rpath: Update from GNULIB.

2019-11-10         Arnold D. Robbins     <arnold@skeeve.com>

	* compile, config.rpath: Update from GNULIB. Adds msys support.

2019-11-03         Arnold D. Robbins     <arnold@skeeve.com>

	* field.c (get_field): Remove special case code for fpat_parse_field.
	Fixes a bug reported by Ed Morton <mortoneccc@comcast.net>.

2019-10-19         Arnold D. Robbins     <arnold@skeeve.com>

	* compile, depcomp: Update from GNULIB.

2019-10-13         Arnold D. Robbins     <arnold@skeeve.com>

	Fix handling of assigning @/.../ to FS and RS. Thanks
	to Stephane Chazelas <stephane.chazelas@gmail.com>
	for the report.

	* field.c (set_FS): Check for REGEX in the flags.
	* io.c (set_RS): Ditto.

2019-10-04         Arnold D. Robbins     <arnold@skeeve.com>

	* config.guess, config.sub, install-sh: Updated from GNULIB.

2019-09-30         John E. Malmberg     <wb8tyw@qsl.net>

	* custom.h: OpenVMS does not provide ULLONG_MAX

2019-09-20  Florian Weimer  <fweimer@redhat.com>

	* configure.ac (PRINTF_HAS_F_FORMAT): Include <string.h> for
	strcmp.
	(PRINTF_HAS_A_FORMAT): Likewise.
	* configure: Regenerate.

2019-09-17         Arnold D. Robbins     <arnold@skeeve.com>

	* awkgram.y, commands.y: Upgrade to Bison 3.4.2.
	* NEWS: Updated.

2019-09-10         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* awk.h (block_header): Remove cnt field and replace it with
	highwater. If MEMDEBUG is defined, add active counter.
	* node.c (r_getblock): The cnt field was replaced by active. Update
	highwater as appropriate.
	(r_freeblock): Decrement the active counter (renamed from cnt).
	(more_blocks): Bump the highwater counter (renamed from cnt).
	* builtin.c (do_typeof): When providing PROCINFO debug memory stats,
	replace count_<blah> with <blah>_active and <blah>_highwater. When
	MEMDEBUG is not set, we calculate the active value by subtracting the
	number of elements in the free list from the highwater value.

2019-09-01         Arnold D. Robbins     <arnold@skeeve.com>

	* profile.c (pp_list, pp_concat): Fix use-after-free errors
	in both routines. Thanks to valgrind and Andy's MEMDEBUG code.

2019-09-01         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* awk.h (block_header): Add cnt field even when MEMDEBUG is not
	defined, and add a name field.
	* node.c (nextfree): Initialize new name field.
	(more_blocks): Bump nextfree[id].cnt by BLOCKCHUNK.
	* builtin.c (do_typeof): When the 1st argument is PROCINFO and the
	2nd arg is provided, return new "count_<blah>" fields containing
	the memory allocation accounts of the various block types.

2019-08-30         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* configure.ac (.developing): Add -DMEMDEBUG to CFLAGS.
	* awk.h (block_header): If MEMDEBUG is defined, add cnt field
	to track the number of allocations.
	(getblock, freeblock): When MEMDEBUG is defined, replace these
	macros with calls to new functions r_getblock and r_freeblock.
	* node.c (r_getblock, r_freeblock): New functions that simply
	use malloc and free when MEMDEBUG is defined.

2019-08-30         Andrew J. Schorr      <aschorr@telemetry-investments.com>

	* interpret.h (r_interpret): For Op_match_rec, unref if a
	dynamic regexp. Fixes another memory issue. See the thread starting
	at https://lists.gnu.org/archive/html/bug-gawk/2019-08/msg00023.html.

2019-08-29         Arnold D. Robbins     <arnold@skeeve.com>

	Restore a modified version of the change of
	2016-05-03, which used realloc to shrink the buffer.
