Zack Weinberg 46f384f850 Revert to 2.69-compatible behavior in AC_PROG_LEX (#110346) ... Commit 29ede6b96f caused AC_PROG_LEX to stop looking for a library that provides yywrap. This broke several packages in a Debian archive rebuild. Revert all the way to the 2.69 behavior, which was to set LEXLIB to -ll or -lfl if that library defines yywrap, but allow AC_PROG_LEX to succeed if neither -ll nor -lfl exists on the system, even if a lex program that doesn't define yywrap would need it. (This behavior was a bug, but people have come to depend on it. See https://savannah.gnu.org/support/index.php?110269 and the thread starting from https://lists.gnu.org/r/autoconf-patches/2020-07/msg00013.html for gory details.) To provide a path away from bug-compatibility, AC_PROG_LEX now takes one argument, documented as a whitespace-separated list of options. Two options are defined: ‘yywrap’ means to look for yywrap and behave as if lex is unavailable if it isn’t found; ‘noyywrap’ means to not look for yywrap at all. These are mutually exclusive. Fixes bug #110346. * lib/autoconf/programs.m4 (AC_PROG_LEX): Add an argument which can be either ‘yywrap’, meaning to look for yywrap in -ll, or ‘noyywrap’, meaning to not look for yywrap at all. In the absence of either option, issue an obsoletion warning and revert to behavior bug-compatible with 2.69. * tests/semantics.at: Add more tests of AC_PROG_LEX. * tests/mktests.sh: Exclude AC_PROG_LEX from autogenerated tests. * doc/autoconf.texi: Update documentation of AC_PROG_LEX. * NEWS: Update notes on AC_PROG_LEX.		2020-11-02 16:56:32 -05:00
..
autoconf.texi	Revert to 2.69-compatible behavior in AC_PROG_LEX (#110346)	2020-11-02 16:56:32 -05:00
fdl.texi	make fetch	2020-09-03 12:08:31 -04:00
gendocs_template	make fetch	2020-06-29 17:08:26 -07:00
gnu-oids.texi	make fetch	2020-07-11 11:10:39 -04:00
install.texi	maint: make update-copyright	2020-01-01 11:45:50 -08:00
local.mk	maint: make update-copyright	2020-01-01 11:45:50 -08:00
make-stds.texi	make fetch	2020-06-29 17:08:26 -07:00
standards.texi	make fetch	2020-06-29 17:42:16 -07:00