yysyntax_error: avoid duplicate lookahead collection.

[bison.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index ecdb662e605fd48715da6d64d1c7bfda2288b7bd..4f1b20f94b62c9532b99d395bd3cada897fbec53 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 # Configure template for GNU Bison.                   -*-Autoconf-*-
 #
-# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software
-# Foundation, Inc.
+# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+# Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -16,19 +16,25 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-# We have strange test case titles, so we need Autoconf 2.61 or better.
-AC_PREREQ(2.61)
+# testsuite -C appears in 2.62.
+AC_PREREQ(2.62)
 
-AC_INIT([GNU Bison], [2.3a+], [bug-bison@gnu.org])
-AC_DEFINE([PACKAGE_COPYRIGHT_YEAR], [2007],
+AC_INIT([GNU Bison],
+        m4_esyscmd([build-aux/git-version-gen .tarball-version]),
+        [bug-bison@gnu.org])
+AC_DEFINE([PACKAGE_COPYRIGHT_YEAR], [2008],
           [The copyright year for this package])
-AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2007])
+AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2008])
 
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
 
 # We don't have a file m4/Makefile.am, so we need Automake 1.8 or later.
-AM_INIT_AUTOMAKE([1.8 check-news readme-alpha dist-bzip2])
+# We want gnits strictness only when rolling a formal release so that we can,
+# for example, run make dist at other times without being required to add a
+# bogus NEWS entry.
+AM_INIT_AUTOMAKE([1.8 dist-bzip2]
+                 m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [-], [gnu], [gnits]))
 AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])
 
 # Checks for the compiler.
@@ -45,23 +51,23 @@ AC_ARG_ENABLE(gcc-warnings,
  esac],
              [enableval=no])
 if test "${enableval}" = yes; then
-  gl_WARNING_CFLAGS([-Werror])
-  AC_SUBST([WERROR_CFLAGS], [$WARNING_CFLAGS])
-  WARNING_CFLAGS=
-  gl_WARNING_CFLAGS([-Wall])
-  gl_WARNING_CFLAGS([-Wextra -Wno-sign-compare])
-  gl_WARNING_CFLAGS([-Wcast-align])
-  gl_WARNING_CFLAGS([-Wcast-qual])
-  gl_WARNING_CFLAGS([-Wformat])
-  gl_WARNING_CFLAGS([-Wpointer-arith])
-  gl_WARNING_CFLAGS([-Wwrite-strings])
-  AC_SUBST([WARNING_CXXFLAGS], [$WARNING_CFLAGS])
+  gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
+  AC_SUBST([WERROR_CFLAGS])
+  gl_WARN_ADD([-Wall])
+  gl_WARN_ADD([-Wextra -Wno-sign-compare])
+  gl_WARN_ADD([-Wcast-align])
+  gl_WARN_ADD([-Wcast-qual])
+  gl_WARN_ADD([-Wformat])
+  gl_WARN_ADD([-Wpointer-arith])
+  gl_WARN_ADD([-Wwrite-strings])
+  AC_SUBST([WARN_CXXFLAGS], [$WARN_CFLAGS])
   # The following warnings are not suitable for C++.
-  gl_WARNING_CFLAGS([-Wbad-function-cast])
-  gl_WARNING_CFLAGS([-Wmissing-declarations])
-  gl_WARNING_CFLAGS([-Wmissing-prototypes])
-  gl_WARNING_CFLAGS([-Wshadow])
-  gl_WARNING_CFLAGS([-Wstrict-prototypes])
+  gl_WARN_ADD([-Wbad-function-cast])
+  gl_WARN_ADD([-Wmissing-declarations])
+  gl_WARN_ADD([-Wmissing-prototypes])
+  gl_WARN_ADD([-Wshadow])
+  gl_WARN_ADD([-Wstrict-prototypes])
+  AC_SUBST([WARN_CFLAGS])
   AC_DEFINE([lint], 1, [Define to 1 if the compiler is checking for lint.])
 fi
 
@@ -73,8 +79,8 @@ AC_ARG_ENABLE([yacc],
   , [enable_yacc=yes])
 case $enable_yacc in
 yes)
-  YACC_SCRIPT=yacc
-  YACC_LIBRARY=liby.a;;
+  YACC_SCRIPT=src/yacc
+  YACC_LIBRARY=lib/liby.a;;
 *)
   YACC_SCRIPT=
   YACC_LIBRARY=;;
@@ -86,12 +92,13 @@ AC_SUBST([YACC_LIBRARY])
 AC_PROG_LEX
 AC_PROG_YACC
 AC_PROG_RANLIB
-BISON_PROG_GNU_M4
-if test x"$ac_cv_prog_gnu_m4" != xyes; then
-  AC_MSG_ERROR([GNU M4 1.4 is required])
-fi
+AC_PROG_GNU_M4
 AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.])
+AC_DEFINE_UNQUOTED([M4_GNU_OPTION], ["$M4_GNU"], [Define to "-g" if GNU M4
+supports -g, otherwise to "".])
 AM_MISSING_PROG([HELP2MAN], [help2man])
+AC_PATH_PROG([XSLTPROC], [xsltproc])
+AC_SUBST([XSLTPROC])
 
 # Checks for header files.
 AC_CHECK_HEADERS_ONCE([locale.h])
@@ -110,9 +117,10 @@ BISON_PREREQ_SUBPIPE
 BISON_PREREQ_TIMEVAR
 
 # Gettext.
-# We've never tested with gettext versions before 0.15, so play it safe.
-AM_GNU_GETTEXT([external], [need-formatstring-macros])
-AM_GNU_GETTEXT_VERSION([0.15])
+# We use gnulib, which is only guaranteed to work properly with the
+# latest Gettext.
+AM_GNU_GETTEXT([external], [need-ngettext])
+AM_GNU_GETTEXT_VERSION([0.17])
 BISON_I18N
 
 # Internationalized parsers.
@@ -126,7 +134,7 @@ AC_CONFIG_FILES([etc/bench.pl], [chmod +x etc/bench.pl])
 
 # Initialize the test suite.
 AC_CONFIG_TESTDIR(tests)
-AC_CONFIG_FILES([tests/Makefile tests/atlocal])
+AC_CONFIG_FILES([tests/atlocal])
 AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison])
 AC_CHECK_PROGS([VALGRIND], [valgrind])
 AC_PROG_CXX
@@ -137,17 +145,19 @@ AC_SUBST([GCC])
 AC_SUBST([O0CFLAGS],   [`echo $CFLAGS   | sed 's/-O[[0-9]] *//'`])
 AC_SUBST([O0CXXFLAGS], [`echo $CXXFLAGS | sed 's/-O[[0-9]] *//'`])
 
-gt_JAVACOMP([1.3])
+gt_JAVACOMP([1.3], [1.4])
 gt_JAVAEXEC
 
+# We use gnulib, but from lib/local.mk instead of lib/Makefile.am.
+# So prefix paths with lib/.  See also etc/prefix-gnulib-mk.
+gl_LIBOBJS=`echo "$gl_LIBOBJS" | sed -e 's, , lib/,g'`
+for ac_var in ALLOCA_H ERRNO_H FCNTL_H GETOPT_H INTTYPES_H \
+              STDBOOL_H STDINT_H SYS_WAIT_H WCHAR_H WCTYPE_H
+do
+  eval "test 'x$ac_var' = x || $ac_var=lib/\$$ac_var"
+done
 AC_CONFIG_FILES([Makefile
-                build-aux/Makefile
                 po/Makefile.in
-                data/Makefile
-                etc/Makefile
-                examples/Makefile
-                   examples/calc++/Makefile
-                lib/Makefile src/Makefile
-                doc/Makefile
-                  doc/yacc.1])
+                examples/calc++/Makefile
+                doc/yacc.1])
 AC_OUTPUT