New upstream version 2.6.4

1 files changed, 934 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index c6fecf8..cf99554 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,937 @@
+2017-05-06  Will Estes <westes575@gmail.com>
+
+	* po/ca.po, po/da.po, po/de.po, po/eo.po, po/es.po, po/fi.po,
+	po/fr.po, po/ga.po, po/hr.po, po/ko.po, po/nl.po, po/pl.po,
+	po/pt_BR.po, po/ro.po, po/ru.po, po/sr.po, po/sv.po, po/tr.po,
+	po/vi.po, po/zh_CN.po, po/zh_TW.po: gettext: pulled latest
+	translations; recompiled against current sources
+
+2017-05-06  Will Estes <westes575@gmail.com>
+
+	* NEWS: version 2.6.4 * NEWS: Record release date.
+
+2017-05-06  Will Estes <westes575@gmail.com>
+
+	* .prev-version: note previous version
+
+2017-05-06  Will Estes <westes575@gmail.com>
+
+	* NEWS: doc: update NEWS for upcoming release
+
+2017-05-04  viktor.shepel <shepelvictor@bigmir.net>
+
+	* doc/flex.texi: doc: Correct typo in C code sample in manual
+
+2017-05-04  Explorer09 <explorer09@gmail.com>
+
+	* src/flex.skl: scanner: Mention %# comments are removed when
+	building skel.c
+
+2017-05-02  Demi Obenour <demiobenour@gmail.com>
+
+	* src/flex.skl: Honor user definitions of yy_* macros The user may have defined the yy_* macros themselves.  In that case,
+	don't clobber them.
+
+2017-05-02  Demi Obenour <demiobenour@gmail.com>
+
+	* src/flex.skl, src/main.c: Don't leak macro definitions into header
+	files This allowed unnamespaced definitions to leak into header files,
+	breaking client code.  Fixes #142
+
+2017-05-03  Demi Obenour <demiobenour@gmail.com>
+
+	* src/scan.l: scanner: Check for 0 bracecount when EOL ends quoted
+	literal.  This can happen in the case of // comments (which Flex doesn't
+	handle specially).
+
+2017-05-03  Demi Obenour <demiobenour@gmail.com>
+
+	* src/scan.l: scanner: when bracelevel is negative, treat as zero.  This really should never happen, but this at least fixes the
+	breakage on Verilator.
+
+2017-04-02  Jeff Smith <whydoubt@gmail.com>
+
+	* tests/Makefile.am, tests/tableopts.am, tests/tableopts.sh: test:
+	enable more silent building of tests.  When running 'make V=0 check', some compile and link steps are made
+	less verbose and some are not.  This cleans up most steps that are
+	not.  These have no effect if V=0 is not specified.
+
+2017-05-03  Demi Obenour <demiobenour@gmail.com>
+
+	* src/Makefile.am, src/misc.c, src/mkskel.sh: build: Delete comments
+	from skeleton file.  Since the comments in flex.skl are, by hypothesis, not needed in
+	skel.c, we remove them. THis reduces the size of the resulting
+	executable somewhat.
+
+2017-05-03  Explorer09 <explorer09@gmail.com>
+
+	* Makefile.am, configure.ac, lib/Makefile.am: build: do not generate
+	lib/Makefile.in.  Files in lib/ are picked up and built using makefile directives in
+	src/Makefile.am. Remove the need to generate lib/Makefile.in and the
+	stub lib/Makefile.am.
+
+2017-05-02  Will Estes <westes575@gmail.com>
+
+	* po/POTFILES.in: gettext: revert listing generated .c files
+
+2017-04-10  Jeff Smith <whydoubt@gmail.com>
+
+	* src/filter.c: FLEX_EXIT() is the preferred way to exit flex
+
+2017-04-11  Explorer09 <explorer09@gmail.com>
+
+	* src/misc.c: Fix myesc() 'sptr' conditionals * Don't call isascii() here. It's deprecated in POSIX and not needed   for myesc's case.  * The check of the character class and range here should match
+	  what's defined as {ESCSEQ} in scan.l, so for [[:xdigit:]] we use
+	  isxdigit(); for [0-7] we check '0' <= c <= '7' (not isdigit(c)
+	  because isdigit is locale-dependant in standard's sense) * Add missing length limit for "\x<hex>" (<hex> is at most 2 digits)
+
+2017-04-11  Explorer09 <explorer09@gmail.com>
+
+	* src/flexdef.h, src/misc.c: Obsolete htoui() and otoui(); use
+	strtoul().  No sense to keep these two function when libc's strtoul() can do the
+	same job, but better.
+
+2017-04-12  Todd C. Miller <Todd.Miller@courtesan.com>
+
+	* src/flex.skl: scanner: update yy_buf_size after yyrealloc()
+
+2017-05-02  Simon Sobisch <simonsobisch@web.de>
+
+	* configure.ac: build: use lowest versions for gettext, automake.
+
+2017-05-02  Simon Sobisch <simonsobisch@web.de>
+
+	* po/Makevars, po/Rules-getpo, po/update_linguas.sh: gettext: more
+	recent makevars; new script to update po files.  Previously, "make dist" and similar commands would cause the po
+	files to be updated, which is incorrect. The more recent version now
+	used should not do this.  Replaced Rules-getpo by extra script to manually update and rebuild
+	all po files.
+
+2017-05-02  Simon Sobisch <simonsobisch@web.de>
+
+	* po/POTFILES.in: gettext: list generated files instead of flex,
+	bison sources in POTFILES.in.  Listing the flex and bison sources -- as the gettext manual suggests
+	-- causes warnings. Listing the generated C files for the lexer and
+	parser removes the warnings. Since both files contain line
+	directives, any translator who needs to refer back to those files
+	should be able to find the context in which strings are needed.
+
+2017-05-02  Simon Sobisch <simonsobisch@web.de>
+
+	* autogen.sh: build: only touch ChangeLog if it does not exist
+
+2017-05-02  Simon Sobisch <simonsobisch@web.de>
+
+	* configure.ac, doc/Makefile.am: build: list earliest useable
+	versions for automake
+
+2017-05-02  Simon Sobisch <simonsobisch@web.de>
+
+	* autogen.sh: build: check for how to call libtoolize.  Previously, we would call libtoolize and if that failed, we would
+	call glibtoolize since some platforms have the libtoolize program
+	under that name.  Instead, we check to see if the environment variable LIBTOOLIZE is
+	set and use that if so. Otherwise, we try to find a program
+	"libtoolize" on the path and failing that glibtoolize. We alert the
+	user if no suitable program can be found.
+
+2017-01-06  Alastair Hughes <hobbitalastair@gmail.com>
+
+	* configure.ac, m4/ax_prog_cc_for_build.m4, src/Makefile.am: build:
+	support cross compiling.  Check for cross compiling. If cross compiling, build stage1flex
+	using a custom link command.  We also override LDADD since that adds
+	the replacement implementations that are cross compiled, and instead
+	always use the replacement library implementations.  We don't use BUILD_OBJEXT and BUILD_EXEEXT since it seems that
+	automake does not support these.  Fixes #78.
+
+2017-02-17  Explorer09 <explorer09@gmail.com>
+
+	* configure.ac, src/flexdef.h: build: Include <strings.h>; add
+	strcasecmp() check to configure.  strings.h (not string.h) is the standard-defined include header for
+	strcasecmp(). Include <strings.h> for portability (even though glibc
+	exposes strcasecmp() declaration also in <string.h> by default).
+
+2017-02-17  Explorer09 <explorer09@gmail.com>
+
+	* configure.ac, src/flexdef.h: build: Let configure error if missing
+	required functions, headers..  `configure` will now error if a required header or function is not
+	found on the system.  Also add comments on optional functions checks.  Add sys/stats.h and sys/wait.h to list of required headers in
+	configure.  This fixes issue #180.
+
+2017-02-12  Explorer09 <explorer09@gmail.com>
+
+	* src/dfa.c, src/flexdef.h: scanner: compute powers of two faster.  Replace the naive "for" loop in determining power of two with a
+	clever bitwise solution. This code is around the Internet already
+	and is in Public Domain.
+
+2017-02-07  Explorer09 <explorer09@gmail.com>
+
+	* configure.ac, tests/Makefile.am, tests/pthread.l: test: skip
+	pthread test when needed files missing.  "Unlisting" the pthread test when libpthread is not available is
+	never a good idea. Should let it compile into a stub program that
+	returns the "skip" status.  configure.ac and tests/Makefile.am are edited so that pthread test
+	can be built anyway, but only works (not as the stub) when both
+	pthread.h and libpthread are detected on the system.  Also fix a small typo in tests/pthread.l comments.
+
+2017-02-16  Will Estes <westes575@gmail.com>
+
+	* src/Makefile.am: build: mv scan.c when building dist.  Revert change to copy scan.c when building the distribution archive.
+	Move it instead. This satisfies automake's notions of what should be
+	clean and ensures that the distribution archive contains a
+	just-built copy of scan.c.  Fixes #186
+
+2017-02-06  Will Estes <westes575@gmail.com>
+
+	* src/Makefile.am: build: don't assume distdir/scan.c is writeable
+
+2017-01-02  Explorer09 <explorer09@gmail.com>
+
+	* src/Makefile.am: build: Add dist-hook to force remake scan.c.  This will ensure the flex scanner included in release tarball being
+	generated by exactly the flex version to be released.  Here's one catch after this change: You may not run "make dist" or
+	"make distdir" if you configure the flex source to be
+	cross-compiled.
+
+2017-01-02  Explorer09 <explorer09@gmail.com>
+
+	* src/Makefile.am: build: respect '--localedir' from configure.  Makefile shouldn't overwrite the 'localedir' variable, because
+	that's what '--localedir' option in 'configure' is for.
+
+2017-01-02  Explorer09 <explorer09@gmail.com>
+
+	* src/Makefile.am: build: Remove "-I$(top_srcdir)/intl" from
+	CPPFLAGS.  Revert commit e02c3d27eeb6b53ec82532ab080c23ce26813fd4 ("include the intl/ subdirectory when searching for include files") Flex doesn't come with libintl source code, so inclusion of
+	$(top_srcdir)/intl subdirectory during compiling is unnecessary.  This flag seems to be left after "remove intl from dist" (commit
+	8f45da06adbd7dbcdfdbdd5c20ff4c47fc504f35) without someone cleaning
+	this up.  Users who need to build with gettext functionality from libintl
+	would use the '--with-libintl-prefix' configure option.
+
+2017-02-03  Explorer09 <explorer09@gmail.com>
+
+	* src/regex.c: scanner: fix regcomp's error reporting, double
+	malloc.  Fix unneeded double malloc - let regerror(). Write its message after
+	our "regcomp for (regex) failed: " string.  Also, errbuf cannot be free()'d because of flexfatal containing a
+	longjmp.
+
+2017-01-03  Explorer09 <explorer09@gmail.com>
+
+	* tests/Makefile.am, tests/no_bison_stub.c: test: Skip bison tests
+	if bison is not available
+
+2017-01-03  Explorer09 <explorer09@gmail.com>
+
+	* configure.ac: build: remove repeated bison detection from
+	configure.  AC_PROG_YACC already detects the bison program. We can just use it,
+	and make notice if [ $YACC != 'bison -y' ] Remove unused AC_SUBST([BISON], ...).  Add AM_CONDITIONAL([HAVE_BISON], ...) so that we can skip bison
+	tests in testsuite when bison is absent.  We don't make any attempt to detect other yacc implementations since
+	flex is developed with bison. While it would be possible, the need
+	isn't there right now. It would be possible to add a --with-parser
+	option that defaulted to bison if such a need cropped up.
+
+2017-01-01  Explorer09 <explorer09@gmail.com>
+
+	* src/Makefile.am: build: fix Makefile parse.h dependency clauses.  The current clauses stating "main.c: parse.h" and "yylex.c: parse.h"
+	do not work as expected. Make did not try to build parse.h upon
+	building flex-main.o as it would think main.c exist already and
+	ignore the clause. Fix this by explicitly stating that the .o files
+	depend on parse.h instead.  This dependency bug only happens if user builds flex from a
+	checked-out repository.
+
+2017-01-03  Explorer09 <explorer09@gmail.com>
+
+	* tests/Makefile.am: test: Remake *_scanner.c if *_scanner.h is
+	missing.  If a ${foo}_scanner.c exists but the respective ${foo}_scanner.h is
+	missing, then 'make' can halt. Fix this by deleting the
+	${foo}_scanner.c file and then remake it. This rule is the same as
+	the automake-generated rule for .c files that require LEX or YACC
+	(except automake will use ylwrap).
+
+2016-12-31  Explorer09 <explorer09@gmail.com>
+
+	* tests/Makefile.am: test: remove BUILT_SOURCES; add missing
+	dependencies.  Without BUILT_SOURCES in Makefile, no test sources in tests/ will be
+	built when using the default "make all" target. This is desireable
+	for people who are just building flex but who do not want to run,
+	and therefore, build any part of the test suite.  Also fix missing sources dependencies:     bison_nr_scanner.$(OBJEXT): bison_nr_parser.h     bison_yylloc_scanner.$(OBJEXT): bison_yylloc_parser.h     bison_yylval_scanner.$(OBJEXT): bison_yylval_parser.h
+
+2017-01-19  Explorer09 <explorer09@gmail.com>
+
+	* configure.ac, lib/reallocarray.c, src/flexint.h, src/misc.c: 
+	build: detect overflow for [re]allocate_array.  Use reallocarray() when we have it (i.e. in OpenBSD system). When we
+	don't, use equivalent overflow detection for our allocate_array and
+	reallocate_array functions.  Remove lib/reallocarray.c from our LIBOBJS as we no longer need it.  Provide a fallback SIZE_MAX macro definition in flexint.h (not
+	preprocessor friendly, but enough for our reallocate_array use
+	case).
+
+2017-01-23  Will Estes <westes575@gmail.com>
+
+	* NEWS, configure.ac: doc: v2.6.4
+
+2017-01-23  Thomas Klausner <wiz@NetBSD.org>
+
+	* src/Makefile.am: build: more BSD make and vpath build fixes.  BSD make doesn't like $< with more than one source specified.
+	Additionally, make sure to specify srcdir when referring to source
+	files since vpath builds depend on this.
+
+2017-01-22  Thomas Klausner <wiz@NetBSD.org>
+
+	* src/Makefile.am: build: Fix skel.c generation with BSD make
+
+2017-01-22  Christos Zoulas <christos@zoulas.com>
+
+	* src/flex.skl: Add more defines in the non-reentrant part.  Fix the reentrant part; don't "#define yyfoo yyfoo" because it
+	breaks code that does #ifndef yywrap ..
+
+2017-01-22  Christos Zoulas <christos@zoulas.com>
+
+	* src/flexdef.h: scanner: Add yyparse prototype
+
+2017-01-22  Thomas Klausner <wiz@NetBSD.org>
+
+	* src/flex.skl: scanner: move comment for consistency
+
+2017-01-22  Christos Zoulas <christos@zoulas.com>
+
+	* src/misc.c: scanner: Use array instead of pointer
+
+2017-01-22  Christos Zoulas <christos@zoulas.com>
+
+	* src/main.c: scanner: manage path to m4 better.  Avoid alloca() for SSP; it is better anyway; since we don't need to
+	strdup the path.
+
+2017-01-22  Christos Zoulas <christos@zoulas.com>
+
+	* src/gen.c: scanner: Avoid creating unused label
+
+2017-01-22  Christos Zoulas <christos@zoulas.com>
+
+	* src/buf.c: Cast argument to avoid arithmetic on void *.
+
+2017-01-22  Christos Zoulas <christos@zoulas.com>
+
+	* src/scan.l: scanner: Use strncpy
+
+2017-01-22  Christos Zoulas <christos@zoulas.com>
+
+	* src/main.c: scanner: Use prefix when defining yywrap to avoid
+	redefinition.  Fixes regression introduced in v2.6.3.
+
+2017-01-22  Christos Zoulas <christos@zoulas.com>
+
+	* src/flexdef.h, src/misc.c: scanner: Include stdarg.h for va_list
+
+2017-01-22  Christos Zoulas <christos@zoulas.com>
+
+	* src/flexdef.h, src/main.c, src/parse.y: scanner: Rename warn to
+	lwarn.  This avoids a naming conflict in NetBSD's  libc.
+
+2017-01-01  Explorer09 <explorer09@gmail.com>
+
+	* tests/README: test: document automake convention for skipped exit
+	status.
+
+2017-01-03  Explorer09 <explorer09@gmail.com>
+
+	* tests/Makefile.am: test: let testwrapper scripts be run by
+	${SHELL}.  This allows user to use a different shell if /bin/sh has problems.
+	The use of $SHELL (variable) to run scripts is already an Automake
+	convention. All shell scripts in build-aux are run by $SHELL.
+
+2017-01-02  Explorer09 <explorer09@gmail.com>
+
+	* tests/options.cn, tests/tableopts.sh,
+	tests/testwrapper-direct.sh, tests/testwrapper.sh: test: Remove test
+	scripts bashisms.  They now all work under a POSIX compliant sh. Specifically, 'dash'
+	can now be used for running "make check" tests.  Note that none of these scripts has ever been using a pipe, so `set
+	-o pipefail` is unnecessary and removed.
+
+2017-01-02  Explorer09 <explorer09@gmail.com>
+
+	* tests/testwrapper.sh: test: exit on '-1' test non-zero status.  If a '-1' test program returns a non-zero status, don't go further
+	and compare it's (numeric) output values. This allows a '-1' test to
+	indicate a "skip" status or an otherwise error. (Currently no such
+	'-1' test would skip like this, though.) Shell syntax note: `set -e` will not exit with the syntax like this
+	`test $(false) = $(false);`. The exit statuses of `false` in the
+	example will be ignored instead. But putting the output in a
+	variable, such as `VAR=$(false)`, DOES exit.
+
+2017-01-02  Explorer09 <explorer09@gmail.com>
+
+	* Makefile.am, src/Makefile.am: build: Fix 'make indent' target This 'make indent' target has not been working since the directories
+	reorganization in flex 2.6.0. Now make it work again.  Note that the current indent profile breaks many styles of existing
+	code. The indent target should not be used until the .indent.pro
+	options are reviewed for desireability.
+
+2017-01-01  Explorer09 <explorer09@gmail.com>
+
+	* configure.ac: build: Simplify indent program detection
+
+2017-01-12  Tobias Klauser <tklauser@distanz.ch>
+
+	* src/filter.c: filter: Don't emit #line if %option noline set One place emitting a #line directive to the generated header was
+	missed in commit 647a92b9f4 when resolving #55. Fix it to respect
+	gen_line_dirs as well.
+
+2017-01-12  Will Estes <westes575@gmail.com>
+
+	* po/ca.po, po/da.po, po/de.po, po/eo.po, po/es.po, po/fi.po,
+	po/fr.po, po/ga.po, po/hr.po, po/ko.po, po/nl.po, po/pl.po,
+	po/pt_BR.po, po/ro.po, po/ru.po, po/sr.po, po/sv.po, po/tr.po,
+	po/vi.po, po/zh_CN.po, po/zh_TW.po: translation: refresh po files
+	from translation project
+
+2017-01-10  Harald van Dijk <harald@gigawatt.nl>
+
+	* src/flex.skl: c++: Fix yyrestart(NULL) SEGV.  Binding a reference to a dereferenced null pointer is invalid and
+	compilers optimise away the &file == 0 check. We need a real stream.  yyin is available already, and yyrestart(NULL) is only supported
+	when yyin will not be used, so there is no harm in just passing in
+	that.  Since we now always have a valid stream, we can skip the null
+	check too.  Fixes #98.
+
+2017-01-09  luistung <dongliang1986@gmail.com>
+
+	* src/scan.l: scanner: join symbol list.  Removed a newline that caused a problem building the scanner in some
+	circumstances. Specifically: 'bad character' error  when executing /bin/sh ../build-aux/ylwrap scan.l lex.yy.c scan.c -- flex
+
+2017-01-11  Will Estes <westes575@gmail.com>
+
+	* src/flex.skl: scanner: remove void cast before fprintf
+
+2016-12-30  Will Estes <westes575@gmail.com>
+
+	* NEWS: doc: update NEWS for 2.6.3 release
+
+2016-11-26  Explorer09 <explorer09@gmail.com>
+
+	* configure.ac, src/Makefile.am: build: New configure option
+	'--disable-bootstrap'.  If configure is run with '--disable-bootstrap', then stage1flex
+	won't be built and stage1scan.c will be generated by sed'ing scan.c.  This option is intended to workaround bootstrap bugs rather than to
+	fix the bootstrapping issues which are proving subtler and harder to
+	fix than anyone would like.
+
+2016-11-26  Explorer09 <explorer09@gmail.com>
+
+	* src/Makefile.am: build: "make clean" deletes stage1scan.c,
+	stage1flex
+
+2016-11-26  Explorer09 <explorer09@gmail.com>
+
+	* configure.ac, src/Makefile.am: build: allow building libfl even
+	with --disable-libfl.  For various reasons, we may wish to build libfl explicitly even when
+	configure has been run with the --disable-libfl option. This is
+	possible, now, via 'make -C src libfl.la'.
+
+2016-12-19  Alexis La Goutte <alexis.lagoutte@gmail.com>
+
+	* src/flex.skl: scanner: remove trailing whitespace in skeleton
+
+2016-12-01  Demi Obenour <demiobenour@gmail.com>
+
+	* src/buf.c, src/main.c, src/parse.y: scanner: Disallow, overquote
+	'[' and ']' in prefix
+
+2016-12-29  Samuel Thibault <samuel.thibault@ens-lyon.org>
+
+	* src/main.c: scanner: allocate correct buffer size for m4 path.  Flex did not check the length of the m4 path which could lead to a
+	buffer overflow in some cases. Additionally, not all platforms
+	believe in PATH_MAX, so stop relying on it.  Fixes #138
+
+2016-11-24  Will Estes <westes575@gmail.com>
+
+	* NEWS: doc: note no more libcompat in NEWS
+
+2016-11-24  Will Estes <westes575@gmail.com>
+
+	* lib/Makefile.am: build: explain empty lib/Makefile.am
+
+2016-11-20  Explorer09 <explorer09@gmail.com>
+
+	* configure.ac: build: warn about cross compiling with *alloc
+
+2016-11-19  Explorer09 <explorer09@gmail.com>
+
+	* configure.ac, lib/Makefile.am, lib/lib.c, src/Makefile.am: build:
+	Link $(LIBOBJS) from src/ dir, remove libcompat.la.  The libcompat.la library was small and less friendly to
+	bootstrapping and cross compilation. Now, we will simply link
+	individual object files as needed, which is simpler.
+
+2016-11-16  Explorer09 <explorer09@gmail.com>
+
+	* src/Makefile.am: build: Let stage1flex respect LFLAGS
+
+2016-11-14  Will Estes <westes575@gmail.com>
+
+	* NEWS: doc: describe --disable-libfl in NEWS
+
+2016-10-31  Explorer09 <explorer09@gmail.com>
+
+	* configure.ac, src/Makefile.am: build: Add --disable-libfl
+	configure option.  Disabling libfl is useful when building flex for a cross-toolchain.  Fixes: GH-99
+
+2016-11-09  Demi Obenour <demiobenour@gmail.com>
+
+	* src/flex.skl, tests/array_r.l: fix backwards incompatible changes
+	in 2.6.2.  This patch addscompatibility `#defines` for all macros affected by
+	`%prefix`.  Fixes #113.
+
+2016-11-08  Will Estes <westes575@gmail.com>
+
+	* tests/.gitignore: git: ignore quote_in_comment artifacts
+
+2016-11-08  Demi Obenour <demiobenour@gmail.com>
+
+	* src/scan.l, tests/Makefile.am, tests/quote_in_comment.l,
+	tests/quote_in_comment.txt: Fixes a major bug in Flex's own lexing
+	of literals.  My changes caused Flex to mishandle string and character literals in
+	line comments.  This commit fixes them.  Fixes #113.
+
+2016-11-06  Thomas Klausner <wiz@NetBSD.org>
+
+	* configure.ac: Fix unportable test(1) operator.  "==" is only supported by bash, "=" is the standard comparison
+	operator.
+
+2016-11-02  Demi Obenour <demiobenour@gmail.com>
+
+	* tests/quotes.l: Add more escaping tests
+
+2016-11-01  Demi Obenour <demiobenour@gmail.com>
+
+	* src/scan.l: Fix another escaping bug in non-indented verbatim section 2 code.  I also did some reformatting.
+
+2016-10-28  Alastair Hughes <hobbitalastair@gmail.com>
+
+	* configure.ac: build: fix false negatives for help2man and texi2dvi HELP2MAN and TEXI2DVI (or the corresponding ac_prog variables) will
+	never be zero length as they fall back to the missing script; check
+	for the fall back and warn on that instead of always warning.
+
+2016-10-28  Explorer09 <explorer09@gmail.com>
+
+	* doc/Makefile.am: doc: Don't delete flex.1 during "make distclean".  flex.1 is pre-generated in release tarball. If we delete it, the
+	next "configure and make" on the source directory will then require
+	help2man unnecessarily.
+
+2016-10-27  Alastair Hughes <hobbitalastair@gmail.com>
+
+	* NEWS, doc/Makefile.am: Only regenerate the man page when required.  Make the flex binary an order-only prerequisite, and add back the
+	prerequisites from before 7cfb440. This prevents rebuilding the man
+	page whenever the flex binary is rebuilt, which causes problems if
+	help2man is not installed and will never work when cross compiling.  Fixes #108.
+
+2016-10-26  Will Estes <westes575@gmail.com>
+
+	* NEWS, src/Makefile.am: build: no longer build PIC version of
+	libfl.  The PIC version of libfl was not being built correctly. From the
+	lack of bug reports around this problem, we conclude that the PIC
+	version of libfl is not used and so we drop it from the build build
+	targets for flex.
+
+2016-10-25  Explorer09 <explorer09@gmail.com>
+
+	* README.md: doc: README.md formatting fixes * Wrap everything in the raw document in 72 char per line limit.  * Proper casing for terms "Git" and "GitHub" (don't try to look
+	lazy).  * Add unordered list marks when needed.  * Say `configure && make && make install` and quoted for fixed-width   font.  Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
+
+2016-10-25  Will Estes <westes575@gmail.com>
+
+	* NEWS, configure.ac: build: version 2.6.3 begins
+
+2016-10-24  Will Estes <westes575@gmail.com>
+
+	* NEWS: doc: mark 2.6.2 release date
+
+2016-10-24  Will Estes <westes575@gmail.com>
+
+	* .gitignore, NEWS, configure.ac: build: switch xz to lzip
+
+2016-10-20  Demi Obenour <demiobenour@gmail.com>
+
+	* src/scan.l, tests/quotes.l: Fix M4 quotation in section 2 prologue
+	and refactor duplicated code
+
+2016-10-21  Alex Kennedy <alexzanderkennedy@gmail.com>
+
+	* doc/flex.texi: Update flex.texi: Removed repedative wording "Flex used to" was written twice at the beginning of Chapter 9,
+	paragraph 2.
+
+2016-09-27  Demi Obenour <demiobenour@gmail.com>
+
+	* src/dfa.c, src/gen.c, src/main.c, src/nfa.c, src/parse.y,
+	src/scan.l, tests/bison_yylval_scanner.l,
+	tests/include_by_push.direct.l: Improved M4 quotation This fixes M4 quotation of certain strings beginning with `yy` (in
+	section 3 of the input file only) and character literals.  The new
+	quotation method is also less brittle and faster.  Tests that relied on the old behavior were fixed.  Also, `yyconst` is no longer defined; use `const` (which it
+	unconditionally was defined to) instead.
+
+2016-10-19  Will Estes <westes575@gmail.com>
+
+	* Makefile.am, configure.ac: build: for automake, flex is foreign
+
+2016-10-19  Will Estes <westes575@gmail.com>
+
+	* README, README.md: doc: mv README to README.md
+
+2016-10-19  Will Estes <westes575@gmail.com>
+
+	* README: doc: touch up README
+
+2016-10-19  Will Estes <westes575@gmail.com>
+
+	* README: doc: README no longer mentions sourceforge
+
+2016-10-06  Will Estes <westes575@gmail.com>
+
+	* NEWS: doc: update NEWS with more post-2.6.1 additions
+
+2016-09-27  Demi Obenour <demiobenour@gmail.com>
+
+	* src/filter.c, src/flexdef.h, src/main.c, src/misc.c,
+	src/options.c, src/options.h, src/scan.l, src/yylex.c,
+	tests/Makefile.am, tests/alloc_extra.l, tests/array_r.l,
+	tests/basic_r.l, tests/c_cxx_nr.lll, tests/c_cxx_r.lll,
+	tests/debug_r.l, tests/include_by_reentrant.direct.l,
+	tests/lineno_r.l, tests/mem_nr.l, tests/mem_r.l, tests/posix.l,
+	tests/posixly_correct.l, tests/pthread.l, tests/quotes.l,
+	tests/reject.l4, tests/rescan_nr.direct.l, tests/rescan_r.direct.l,
+	tests/string_nr.l, tests/string_r.l: Fix M4 quoting of section 3.  This fixes M4 quoting of section 3 of the input file, including
+	escape sequences and character constants.  Tests were added to verify the behavior in section 3 with respect to
+	quoting. Both escaping of quotes and quoting of potential
+	macro-start characters are tested. Existing tests were also fixed to
+	account for the new -- and now correct -- behavior. Many tests
+	relied on the old behavior of expanding M4 macros in section 3.
+	They needed to be updated for the new behavior.
+
+2016-10-03  Mightyjo <mightyjo@gmail.com>
+
+	* src/flex.skl, tests/.gitignore, tests/Makefile.am,
+	tests/cxx_restart.ll, tests/cxx_restart.txt: Fix yyrestart(NULL)
+	SEGV.
+
+2016-09-05  Demi Obenour <demiobenour@gmail.com>
+
+	* src/scan.l: scanner: M4 quoting fixes
+
+2016-09-05  Demi Obenour <demiobenour@gmail.com>
+
+	* src/Makefile.am: Support `make indent` for out of source builds
+
+2016-09-24  Demi Obenour <demiobenour@gmail.com>
+
+	* src/Makefile.am, src/mkskel.sh: Simplify some shell code
+
+2016-09-23  Demi Obenour <demiobenour@gmail.com>
+
+	* doc/flex.texi, src/flex.skl, src/flexdef.h, src/main.c,
+	src/options.c, src/options.h, src/scan.l, tests/.gitignore,
+	tests/Makefile.am, tests/noansi_nr.l, tests/noansi_nr.txt,
+	tests/noansi_r.l, tests/noansi_r.txt: no longer generate K&R C
+	scanners
+
+2016-09-04  Demi Obenour <demiobenour@gmail.com>
+
+	* src/scan.l: Fix escaping of `[[` and `]]` in strings Previously, `[[` and `]]` were not escaped in strings, which led to
+	bad interactions with m4.  Also, don't break strings on newline, as GCC et al support
+	whitespace between a backslash and the subsequent newline.
+
+2016-06-20  Translation Project <coordinator@translationproject.org>
+
+	* NEWS, po/sv.po: new sv translation
+
+2016-05-23  Demetri Obenour <demiobenour@gmail.com>
+
+	* src/misc.c: Delete action_m4_define from misc.c This function was not used and always triggered a fatal error when
+	run.
+
+2016-05-20  Will Estes <westes575@gmail.com>
+
+	* tests/Makefile.am, tests/testwrapper-direct.sh: test: run direct
+	tests from srcdir
+
+2016-01-11  Egor Pugin <egor.pugin@gmail.com>
+
+	* tests/include_by_buffer.direct.l, tests/include_by_push.direct.l,
+	tests/include_by_reentrant.direct.l: Exited with error code on some
+	conditions in include tests
+
+2016-05-20  Will Estes <westes575@gmail.com>
+
+	* tests/testwrapper.sh: test: drop .exe when making input file names
+
+2016-05-20  Will Estes <westes575@gmail.com>
+
+	* tests/Makefile.am: test: removed dependencies for include tests
+
+2016-04-28  Tobias Klauser <tklauser@distanz.ch>
+
+	* src/scanflags.c: Avoid realloc on every call of sf_push() Currently, every call to sf_push() realloc()'s _sf_stack, even if
+	the maximum size _sf_max wasn't changed. As the indentation beneath
+	the "if" clause already indicates, the realloc() should only be
+	executed if _sf_max was increased.  Found by compiling flex with the -Wmisleading-indentation flags of
+	gcc, which leads to the following warning: scanflags.c: In function ‘sf_push’: scanflags.c:42:5: warning:
+	     this ‘if’ clause does not guard... [-Wmisleading-indentation] if
+	     (_sf_top_ix + 1 >= _sf_max) ^~ scanflags.c:44:9: note: ...this
+	         statement, but the latter is misleadingly indented as if it is
+	         guarded by the ‘if’ _sf_stk = realloc(_sf_stk,
+	         sizeof(scanflags_t) * _sf_max); ^~~~~~~
+
+2016-03-31  Will Estes <westes575@gmail.com>
+
+	* doc/Makefile.am: build: prettified command to build man page
+
+2016-03-31  Will Estes <westes575@gmail.com>
+
+	* doc/Makefile.am: build: added man page to DISTCLEANFILES
+
+2016-03-31  Will Estes <westes575@gmail.com>
+
+	* BUGS, TODO: remove unused TODO, BUGS files
+
+2016-03-31  Will Estes <westes575@gmail.com>
+
+	* to.do/README, to.do/Wilhelms.todo, to.do/Wish-List,
+	to.do/flex.rmail, to.do/streams.mail, to.do/unicode/FlexLexer.h,
+	to.do/unicode/ccl.c, to.do/unicode/changes.txt,
+	to.do/unicode/ecs.c, to.do/unicode/flex.1, to.do/unicode/flex.skl,
+	to.do/unicode/flexdef.h, to.do/unicode/gen.c, to.do/unicode/main.c,
+	to.do/unicode/misc.c, to.do/unicode/scan.l, to.do/unicode/tblcmp.c: 
+	removed to.do/ directory
+
+2016-03-31  Will Estes <westes575@gmail.com>
+
+	* po/POTFILES.in: gettext: removed flex.skl from POTFILES.in file
+	list
+
+2016-03-31  rlar <rlar>
+
+	* src/Makefile.am: fix skel.c dependency (missing tables_shared.c)
+	 and polish build rule Also remove references to srcdir since skel.c is no longer mentioned
+	in po/POTFILES.in.
+
+2016-03-31  rlar <rlar>
+
+	* doc/Makefile.am: fix flex.1 dependency git clean -fdx && ./autogen.sh && \   mkdir -p ../build && cd ../build && ../flex/configure && make -j10
+	  && \ make dist failed with: >  help2man: can't get `--help' info from ../../flex/src/flex Note:   There is no dependency except for the flex binary.
+
+2016-03-31  rlar <rlar>
+
+	* src/Makefile.am: fix stage1scan.c and stage1scan.l dependency git clean -fdx && ./autogen.sh && \   mkdir -p ../build && cd ../build && ../flex/configure && make -j10 failed with: > ../src/stage1flex -o stage1scan.c stage1scan.l > stage1flex: can't
+	open stage1scan.l Note:   stage1scan.c is not necessairy in the "make dist" generated tar.gz
+	  file.  stage1flex will be build from scan.c (which is
+	    distributed), and this will then generate stage1scan.c from scan.l
+
+2016-03-31  Will Estes <westes575@gmail.com>
+
+	* po/POTFILES.in: gettext: list src/flex.skl in po/POTFILES.in
+
+2016-03-29  rlar <rlar>
+
+	* src/gen.c: warning in generated code, with -Ca warning: conversion to 'yy_state_type' from 'flex_uint32_t' may
+	change the sign of the result [-Wsign-conversion]
+
+2016-03-29  rlar <rlar>
+
+	* tests/Makefile.am: suppress `WARNINGFLAGS' for the almost obsolete
+	`noansi' test cases
+
+2016-03-29  rlar <rlar>
+
+	* configure.ac, src/Makefile.am, tests/Makefile.am: configure option
+	`--enable-warnings' and `WARNINGFLAGS' `WARNINGFLAGS' can be passed when invoking `configure'  and when invoking `make' if configure switch `--enable-warnings' was given   then default to something useful if we have `GCC' `WARNINGFLAGS' is not used when compiling `stage1flex'   to avoid unnecessary clutter
+
+2016-03-31  Tobias Klauser <tklauser@distanz.ch>
+
+	* src/main.c: Fix potential buffer overflow in strncat() When using clang/llvm 3.8 to compile flex, the following warning is
+	emitted: main.c:378:27: warning: the value of the size argument in 'strncat'
+	                                        is too large, might lead to a buffer overflow [-Wstrncat-size]
+	strncat(m4_path, m4, sizeof(m4_path));
+	^~~~~~~~~~~~~~~
+	main.c:378:27: note: change the argument to be the free space in the
+	                                        destination buffer minus the terminating null byte strncat(m4_path,
+	                                                             m4, sizeof(m4_path)); ^~~~~~~~~~~~~~~
+	sizeof(m4_path) - strlen(m4_path) - 1Fix it up by using the solution proposed by the warning message.
+
+2016-03-29  Robert.Larice Robert Larice <Robert.Larice@t-online.de>
+
+	* src/Makefile.am: build: simplified dependency tracking so parallel
+	make runs succeed
+
+2016-03-20  rlar <rlar>
+
+	* src/flex.skl, src/gen.c, src/main.c: avoid warning in generated
+	code, with -Cf warning: conversion to 'unsigned int' from 'int' may change the sign
+	of the result [-Wsign-conversion]
+
+2016-03-18  Will Estes <westes575@gmail.com>
+
+	* NEWS, configure.ac: mention v2.6.2; summarize changes since 2.6.1
+
+2016-03-18  Will Estes <westes575@gmail.com>
+
+	* doc/flex.texi: doc: corrected example in manual, gh#67
+
+2016-03-16  rlar <rlar>
+
+	* tests/string_nr.l, tests/string_r.l, tests/yyextra.l: warning:
+	conversion to 'size_t' from 'int' may change the sign of the result
+	[-Wsign-conversion]
+
+2016-03-16  rlar <rlar>
+
+	* tests/mem_nr.l, tests/mem_r.l, tests/pthread.l: warning:
+	conversion to 'long unsigned int' from 'int' may change the sign of
+	the result [-Wsign-conversion]
+
+2016-03-16  rlar <rlar>
+
+	* src/flex.skl: warning: conversion to 'flex_uint32_t' from 'long
+	unsigned int' may alter its value [-Wconversion] struct yytbl_reader, member bread is of type flex_uint32_t
+
+2016-03-16  rlar <rlar>
+
+	* tests/alloc_extra.l, tests/bison_nr_main.c,
+	tests/bison_nr_parser.y, tests/bison_yylloc_parser.y: warning:
+	redundant redeclaration of '...' [-Wredundant-decls]
+
+2016-03-16  rlar <rlar>
+
+	* tests/bison_nr_parser.y, tests/bison_yylloc_parser.y,
+	tests/bison_yylval_parser.y, tests/pthread.l: warning: no previous
+	prototype for '...' [-Wmissing-prototypes]
+
+2016-03-16  rlar <rlar>
+
+	* tests/multiple_scanners_r_main.c: warning: unused variable 'fp'
+	[-Wunused-variable]
+
+2016-03-16  rlar <rlar>
+
+	* tests/pthread.l: main(), warning: redundant redeclaration of
+	'main' [-Wredundant-decls]
+
+2016-03-16  rlar <rlar>
+
+	* tests/include_by_reentrant.direct.l, tests/lineno_nr.l,
+	tests/lineno_r.l, tests/lineno_trailing.l: main(), warning:
+	old-style function definition [-Wold-style-definition]
+
+2016-03-16  rlar <rlar>
+
+	* tests/alloc_extra.l, tests/array_nr.l, tests/array_r.l,
+	tests/basic_nr.l, tests/basic_r.l, tests/ccl.l, tests/debug_nr.l,
+	tests/debug_r.l, tests/extended.l, tests/mem_nr.l, tests/mem_r.l,
+	tests/noansi_r.l, tests/posix.l, tests/posixly_correct.l,
+	tests/prefix_nr.l, tests/prefix_r.l, tests/quotes.l,
+	tests/string_nr.l, tests/string_r.l, tests/yyextra.l: main(),
+	warning: old-style function definition [-Wold-style-definition]
+
+2016-03-01  rlar <rlar>
+
+	* src/ecs.c, src/tblcmp.c: Fix two more casts
+
+2016-03-14  Bastian Köcher <git@kchr.de>
+
+	* src/gen.c: Fixes yyl compare with unsigned warning
+
+2016-03-13  Robert Larice <Robert.Larice@t-online.de>
+
+	* configure.ac: Suppress portability warnings in Makefile generation
+
+2016-02-27  rlar <rlar>
+
+	* src/flex.skl: generated code, in yyensure_buffer_stack(), change
+	type of local `num_to_alloc' which is exclusively used in yy_size_t context
+
+2016-03-01  rlar <rlar>
+
+	* src/flex.skl: generated code, in yy_get_next_buffer(), change type
+	of local `number_to_move' suits better, because `yy_n_chars' and `yy_buf_size' are of type
+	`int'
+
+2016-02-27  rlar <rlar>
+
+	* src/flex.skl: generated code, `_yybytes_len' is of type `int', fix
+	code accordingly
+
+2016-02-28  rlar <rlar>
+
+	* src/gen.c: generated code, `max_size' seems to be of type `int',
+	fix casts accordingly
+
+2016-02-28  rlar <rlar>
+
+	* src/flex.skl: generated code, here `new_size' is of type `int',
+	fix casts accordingly
+
+2016-02-28  rlar <rlar>
+
+	* src/flex.skl: generated code, `yy_buf_size' is of type `int', fix
+	casts accordingly
+
+2016-02-28  rlar <rlar>
+
+	* src/flex.skl: generated code, `offset' is of type `int'
+
+2016-02-28  rlar <rlar>
+
+	* src/gen.c: generated code, `yy_more_len' is of type `int'
+
+2016-02-28  rlar <rlar>
+
+	* src/scan.l: scan.l, rewrite two loops to avoid unneccesairy
+	casting
+
+2016-03-01  rlar <rlar>
+
+	* src/regex.c, src/tables.c: improve readability
+
+2016-02-28  rlar <rlar>
+
+	* src/tblcmp.c: another cast in tblcmp.c to avoid warning
+
+2016-02-28  rlar <rlar>
+
+	* src/buf.c: casts in buf_append() to get rid of warnings
+
+2016-02-28  rlar <rlar>
+
+	* src/dfa.c, src/gen.c: cast to suite type of flex_uint32_t td_lolen
+
+2016-02-28  rlar <rlar>
+
+	* src/main.c, src/misc.c, src/regex.c, src/scan.l, src/scanopt.c,
+	src/tables_shared.c: cast to get rid of warnings
+
+2016-03-01  rlar <rlar>
+
+	* src/buf.c, src/main.c: cast and fix usage of log10(), ceil to
+	prevent buffer overflow
+
+2016-03-01  rlar <rlar>
+
+	* src/tables.c: tables.c, sprinkle casts to get rid of warnings
+
+2016-03-01  rlar <rlar>
+
+	* src/tables.c: yytbl_data_compress(), change type of local newsz to
+	get rid of warnings
+
+2016-03-01  rlar <rlar>
+
+	* src/tables.c, src/tables.h: change type of struct
+	yytbl_writer.total_written to get rid of warnings
+
+2016-02-28  rlar <rlar>
+
+	* src/tables.c: change argument type of yytbl_writen() to get rid of
+	warnings
+
+2016-03-01  rlar <rlar>
+
+	* src/tables.c: yytbl_write8/16/32(), change type of local variables
+	to get rid of warnings
+
+2016-02-28  rlar <rlar>
+
+	* src/flexdef.h, src/misc.c, to.do/unicode/flexdef.h,
+	to.do/unicode/misc.c: change return type and rename int
+	htoi()/otoi() --> unsigned int htoui()/otoui()
+
 2016-03-01  Will Estes <westes575@gmail.com>
 
 	* NEWS: Mention 2.6.1 release date