tests: make deprecation tests more specific

[bison.git] / tests / local.at

diff --git a/tests/local.at b/tests/local.at
index 9bee00166da5b788774fbdfc870e20a3eda037b9..b619338d3fa6efdf5ecfb399a7768534f0775007 100644 (file)
--- a/tests/local.at
+++ b/tests/local.at
@@ -2,7 +2,7 @@
 
 # Macros for the GNU Bison Test suite.
 
 
 # Macros for the GNU Bison Test suite.
 

-# Copyright (C) 2003-2011 Free Software Foundation, Inc.
+# Copyright (C) 2003-2012 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
 
 # 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


@@ -17,10 +17,18 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # 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 want a recent Autotest.

 m4_version_prereq([2.58])
 
 
 m4_version_prereq([2.58])
 
 

+# m4_null_if(VAL, IF-TRUE, IF-FALSE)
+# ----------------------------------
+# If VAL evaluates to empty or 0, run IF-TRUE, otherwise IF-FALSE.
+m4_define([m4_null_if],
+[m4_case(m4_quote($1),
+         [0], [$2],
+         [],  [$2],
+         [$3])])
+

 ## ------------- ##
 ## Basic tests.  ##
 ## ------------- ##
 ## ------------- ##
 ## Basic tests.  ##
 ## ------------- ##


@@ -30,13 +38,42 @@ m4_version_prereq([2.58])
 # Expect COUNT matches of the PERL-REGEXP in FILE.  The file is
 # taken in "slurp" mode, i.e., one can match end-of-lines.
 m4_define([AT_MATCHES_CHECK],
 # Expect COUNT matches of the PERL-REGEXP in FILE.  The file is
 # taken in "slurp" mode, i.e., one can match end-of-lines.
 m4_define([AT_MATCHES_CHECK],

-[AT_CHECK([perl -0777 -ne '
+[AT_CHECK([$PERL -0777 -ne '

 my $count = 0;
 s{$2}{ ++$count; "" }gem;
 printf "$count\n";' $1], [0], [$3
 ])])
 
 
 my $count = 0;
 s{$2}{ ++$count; "" }gem;
 printf "$count\n";' $1], [0], [$3
 ])])
 
 

+# AT_SAVE_SPECIAL_FILES / AT_RESTORE_SPECIAL_FILES
+# ------------------------------------------------
+# Don't interfere with caller's files.
+m4_divert_text([PREPARE_TESTS],
+[at_save_special_files ()
+{
+  for at_save_file in stderr experr expout
+  do
+    test ! -f at-bison-check-$at_save_file.bak ||
+      as_fn_error 1 "fatal error: back-up on top of a back-up"
+    test ! -f $at_save_file || mv $at_save_file at-bison-check-$at_save_file.bak
+  done
+}
+
+at_restore_special_files ()
+{
+  for at_save_file in stderr experr expout
+  do
+    test ! -f at-bison-check-$at_save_file.bak ||
+      mv at-bison-check-$at_save_file.bak $at_save_file
+  done
+}
+])
+
+m4_define([AT_SAVE_SPECIAL_FILES],    [at_save_special_files])
+m4_define([AT_RESTORE_SPECIAL_FILES], [at_restore_special_files])
+
+
+

 ## ------------------------------- ##
 ## Macros decoding Bison options.  ##
 ## ------------------------------- ##
 ## ------------------------------- ##
 ## Macros decoding Bison options.  ##
 ## ------------------------------- ##


@@ -64,7 +101,8 @@ m4_popdef([AT_LOC_LAST_COLUMN])])
 # AT_BISON_OPTION_PUSHDEFS([BISON-OPTIONS])
 # -----------------------------------------
 m4_define([AT_BISON_OPTION_PUSHDEFS],
 # AT_BISON_OPTION_PUSHDEFS([BISON-OPTIONS])
 # -----------------------------------------
 m4_define([AT_BISON_OPTION_PUSHDEFS],

-[_AT_BISON_OPTION_PUSHDEFS($[1], $[2], [$1])])
+[m4_divert_text([KILL],
+                [_AT_BISON_OPTION_PUSHDEFS($[1], $[2], [$1])])])

 
 
 # _AT_BISON_OPTION_PUSHDEFS($1, $2, [BISON-OPTIONS])
 
 
 # _AT_BISON_OPTION_PUSHDEFS($1, $2, [BISON-OPTIONS])


@@ -81,8 +119,12 @@ m4_pushdef([AT_SKEL_CC_IF],
 [m4_bmatch([$3], [%language "[Cc]\+\+"\|%skeleton "[a-z0-9]+\.cc"], [$1], [$2])])
 m4_pushdef([AT_SKEL_JAVA_IF],
 [m4_bmatch([$3], [%language "[Jj][Aa][Vv][Aa]"\|%skeleton "[a-z0-9]+\.java"], [$1], [$2])])
 [m4_bmatch([$3], [%language "[Cc]\+\+"\|%skeleton "[a-z0-9]+\.cc"], [$1], [$2])])
 m4_pushdef([AT_SKEL_JAVA_IF],
 [m4_bmatch([$3], [%language "[Jj][Aa][Vv][Aa]"\|%skeleton "[a-z0-9]+\.java"], [$1], [$2])])

+m4_pushdef([AT_LANG],
+[AT_SKEL_JAVA_IF([java],
+                 [AT_SKEL_CC_IF([c++],
+                                [c])])])

 m4_pushdef([AT_GLR_IF],
 m4_pushdef([AT_GLR_IF],

-[m4_bmatch([$3], [%glr-parser\|%skeleton "glr\.], [$1], [$2])])
+[m4_bmatch([$3], [%glr-parser\|%skeleton "glr\..*"], [$1], [$2])])

 m4_pushdef([AT_LALR1_CC_IF],
 [AT_SKEL_CC_IF([AT_GLR_IF([$2], [$1])], [$2])])
 m4_pushdef([AT_GLR_CC_IF],
 m4_pushdef([AT_LALR1_CC_IF],
 [AT_SKEL_CC_IF([AT_GLR_IF([$2], [$1])], [$2])])
 m4_pushdef([AT_GLR_CC_IF],


@@ -95,7 +137,7 @@ m4_pushdef([AT_LEXPARAM_IF],
 m4_pushdef([AT_LOCATION_IF],
 [m4_bmatch([$3], [%locations], [$1], [$2])])
 m4_pushdef([AT_LOCATION_TYPE_IF],
 m4_pushdef([AT_LOCATION_IF],
 [m4_bmatch([$3], [%locations], [$1], [$2])])
 m4_pushdef([AT_LOCATION_TYPE_IF],

-[m4_bmatch([$3], [%define location_type], [$1], [$2])])
+[m4_bmatch([$3], [%define \(api\.location\.type\|location_type\)], [$1], [$2])])

 m4_pushdef([AT_PARAM_IF],
 [m4_bmatch([$3], [%parse-param], [$1], [$2])])
 m4_pushdef([AT_PURE_IF],
 m4_pushdef([AT_PARAM_IF],
 [m4_bmatch([$3], [%parse-param], [$1], [$2])])
 m4_pushdef([AT_PURE_IF],


@@ -107,51 +149,65 @@ m4_pushdef([AT_PURE_AND_LOC_IF],
 m4_pushdef([AT_GLR_OR_PARAM_IF],
 [m4_bmatch([$3], [%glr-parser\|%parse-param], [$1], [$2])])
 m4_pushdef([AT_NAME_PREFIX],
 m4_pushdef([AT_GLR_OR_PARAM_IF],
 [m4_bmatch([$3], [%glr-parser\|%parse-param], [$1], [$2])])
 m4_pushdef([AT_NAME_PREFIX],

-[m4_bmatch([$3], [%name-prefix ".*"],
-           [m4_bregexp([$3], [name-prefix "\([^"]*\)"], [\1])],
+[m4_bmatch([$3], [\(%define api\.prefix\|%name-prefix\) ".*"],
+           [m4_bregexp([$3], [\(%define api\.prefix\|%name-prefix\) "\([^""]*\)"], [\2])],

            [yy])])
 m4_pushdef([AT_TOKEN_PREFIX],
            [yy])])
 m4_pushdef([AT_TOKEN_PREFIX],

-[m4_bmatch([$3], [%define api.tokens.prefix ".*"],
-           [m4_bregexp([$3], [%define api.tokens.prefix "\(.*\)"], [\1])])])
+[m4_bmatch([$3], [%define api.token.prefix ".*"],
+           [m4_bregexp([$3], [%define api.token.prefix "\(.*\)"], [\1])])])
+m4_pushdef([AT_API_prefix],
+[m4_bmatch([$3], [%define api\.prefix ".*"],
+           [m4_bregexp([$3], [%define api\.prefix "\([^""]*\)"], [\1])],
+           [yy])])
+m4_pushdef([AT_API_PREFIX],
+[m4_toupper(AT_API_prefix)])

 # yyerror receives the location if %location & %pure & (%glr or %parse-param).
 m4_pushdef([AT_YYERROR_ARG_LOC_IF],
 [AT_GLR_OR_PARAM_IF([AT_PURE_AND_LOC_IF([$1], [$2])],
 # yyerror receives the location if %location & %pure & (%glr or %parse-param).
 m4_pushdef([AT_YYERROR_ARG_LOC_IF],
 [AT_GLR_OR_PARAM_IF([AT_PURE_AND_LOC_IF([$1], [$2])],

-                   [$2])])
+                    [$2])])

 # yyerror always sees the locations (when activated), except if
 # (yacc & pure & !param).  FIXME: This is wrong.  See the manual.
 m4_pushdef([AT_YYERROR_SEES_LOC_IF],
 [AT_LOCATION_IF([AT_YACC_IF([AT_PURE_IF([AT_PARAM_IF([$1], [$2])],
 # yyerror always sees the locations (when activated), except if
 # (yacc & pure & !param).  FIXME: This is wrong.  See the manual.
 m4_pushdef([AT_YYERROR_SEES_LOC_IF],
 [AT_LOCATION_IF([AT_YACC_IF([AT_PURE_IF([AT_PARAM_IF([$1], [$2])],

-                                       [$1])],
-                           [$1])],
-               [$2])])
+                                        [$1])],
+                            [$1])],
+                [$2])])

 
 # The interface is pure: either because %define api.pure, or because we
 # are using the C++ parsers.
 m4_pushdef([AT_PURE_LEX_IF],
 [AT_PURE_IF([$1],
 
 # The interface is pure: either because %define api.pure, or because we
 # are using the C++ parsers.
 m4_pushdef([AT_PURE_LEX_IF],
 [AT_PURE_IF([$1],

-           [AT_SKEL_CC_IF([$1], [$2])])])
+            [AT_SKEL_CC_IF([$1], [$2])])])
+
+m4_pushdef([AT_YYSTYPE],
+[AT_SKEL_CC_IF([AT_NAME_PREFIX[::parser::semantic_type]],
+               [AT_API_PREFIX[STYPE]])])
+m4_pushdef([AT_YYLTYPE],
+[AT_SKEL_CC_IF([AT_NAME_PREFIX[::parser::location_type]],
+               [AT_API_PREFIX[LTYPE]])])
+

 
 AT_PURE_LEX_IF(
 [m4_pushdef([AT_LOC], [(*llocp)])
  m4_pushdef([AT_VAL], [(*lvalp)])
 
 AT_PURE_LEX_IF(
 [m4_pushdef([AT_LOC], [(*llocp)])
  m4_pushdef([AT_VAL], [(*lvalp)])

- m4_pushdef([AT_LEX_FORMALS],
-           [YYSTYPE *lvalp[]AT_LOCATION_IF([, YYLTYPE *llocp])])
- m4_pushdef([AT_LEX_ARGS],
-           [lvalp[]AT_LOCATION_IF([, llocp])])
+ m4_pushdef([AT_YYLEX_FORMALS],
+            [AT_YYSTYPE *lvalp[]AT_LOCATION_IF([, AT_YYLTYPE *llocp])])
+ m4_pushdef([AT_YYLEX_ARGS],
+            [lvalp[]AT_LOCATION_IF([, llocp])])

  m4_pushdef([AT_USE_LEX_ARGS],
  m4_pushdef([AT_USE_LEX_ARGS],

-           [(void) lvalp;AT_LOCATION_IF([(void) llocp])])
- m4_pushdef([AT_LEX_PRE_FORMALS],
-           [AT_LEX_FORMALS, ])
- m4_pushdef([AT_LEX_PRE_ARGS],
-           [AT_LEX_ARGS, ])
+            [(void) lvalp;AT_LOCATION_IF([(void) llocp])])
+ m4_pushdef([AT_YYLEX_PRE_FORMALS],
+            [AT_YYLEX_FORMALS, ])
+ m4_pushdef([AT_YYLEX_PRE_ARGS],
+            [AT_YYLEX_ARGS, ])

 ],
 [m4_pushdef([AT_LOC], [[(]AT_NAME_PREFIX[lloc)]])
  m4_pushdef([AT_VAL], [[(]AT_NAME_PREFIX[lval)]])
 ],
 [m4_pushdef([AT_LOC], [[(]AT_NAME_PREFIX[lloc)]])
  m4_pushdef([AT_VAL], [[(]AT_NAME_PREFIX[lval)]])

- m4_pushdef([AT_LEX_FORMALS],     [void])
- m4_pushdef([AT_LEX_ARGS],        [])
+ m4_pushdef([AT_YYLEX_FORMALS],     [void])
+ m4_pushdef([AT_YYLEX_ARGS],        [])

  m4_pushdef([AT_USE_LEX_ARGS],    [])
  m4_pushdef([AT_USE_LEX_ARGS],    [])

- m4_pushdef([AT_LEX_PRE_FORMALS], [])
- m4_pushdef([AT_LEX_PRE_ARGS],    [])
+ m4_pushdef([AT_YYLEX_PRE_FORMALS], [])
+ m4_pushdef([AT_YYLEX_PRE_ARGS],    [])

 ])
 
 # Handle the different types of location components.
 ])
 
 # Handle the different types of location components.


@@ -170,16 +226,21 @@ AT_GLR_IF([AT_KEYWORDS([glr])])
 # AT_BISON_OPTION_POPDEFS
 # -----------------------
 m4_define([AT_BISON_OPTION_POPDEFS],
 # AT_BISON_OPTION_POPDEFS
 # -----------------------
 m4_define([AT_BISON_OPTION_POPDEFS],

-[m4_popdef([AT_LEX_PRE_ARGS])
-m4_popdef([AT_LEX_PRE_FORMALS])
+[m4_divert_text([KILL],
+[m4_popdef([AT_YYLEX_PRE_ARGS])
+m4_popdef([AT_YYLEX_PRE_FORMALS])

 m4_popdef([AT_USE_LEX_ARGS])
 m4_popdef([AT_USE_LEX_ARGS])

-m4_popdef([AT_LEX_ARGS])
-m4_popdef([AT_LEX_FORMALS])
+m4_popdef([AT_YYLEX_ARGS])
+m4_popdef([AT_YYLEX_FORMALS])
+m4_popdef([AT_YYLTYPE])
+m4_popdef([AT_YYSTYPE])

 m4_popdef([AT_VAL])
 m4_popdef([AT_LOC])
 m4_popdef([AT_PURE_LEX_IF])
 m4_popdef([AT_YYERROR_SEES_LOC_IF])
 m4_popdef([AT_YYERROR_ARG_LOC_IF])
 m4_popdef([AT_VAL])
 m4_popdef([AT_LOC])
 m4_popdef([AT_PURE_LEX_IF])
 m4_popdef([AT_YYERROR_SEES_LOC_IF])
 m4_popdef([AT_YYERROR_ARG_LOC_IF])

+m4_popdef([AT_API_PREFIX])
+m4_popdef([AT_API_prefix])

 m4_popdef([AT_NAME_PREFIX])
 m4_popdef([AT_GLR_OR_PARAM_IF])
 m4_popdef([AT_PURE_AND_LOC_IF])
 m4_popdef([AT_NAME_PREFIX])
 m4_popdef([AT_GLR_OR_PARAM_IF])
 m4_popdef([AT_PURE_AND_LOC_IF])


@@ -190,11 +251,12 @@ m4_popdef([AT_LEXPARAM_IF])
 m4_popdef([AT_YACC_IF])
 m4_popdef([AT_GLR_IF])
 m4_popdef([AT_SKEL_CC_IF])
 m4_popdef([AT_YACC_IF])
 m4_popdef([AT_GLR_IF])
 m4_popdef([AT_SKEL_CC_IF])

+m4_popdef([AT_LANG])

 m4_popdef([AT_SKEL_JAVA_IF])
 m4_popdef([AT_GLR_CC_IF])
 m4_popdef([AT_LALR1_CC_IF])
 m4_popdef([AT_DEFINES_IF])
 m4_popdef([AT_SKEL_JAVA_IF])
 m4_popdef([AT_GLR_CC_IF])
 m4_popdef([AT_LALR1_CC_IF])
 m4_popdef([AT_DEFINES_IF])

-AT_LOC_POPDEF
+AT_LOC_POPDEF])dnl

 ])# AT_BISON_OPTION_POPDEFS
 
 
 ])# AT_BISON_OPTION_POPDEFS
 
 


@@ -245,8 +307,121 @@ m4_define([AT_DATA_GRAMMAR],
 $2])
 ])
 
 $2])
 ])
 

+# AT_YYLEX_PROTOTYPE
+# AT_YYLEX_DECLARE_EXTERN
+# AT_YYLEX_DECLARE
+# AT_YYLEX_DEFINE([INPUT], [ACTION])
+# ----------------------------------
+# INPUT can be empty, or in double quotes, or a list (in braces).
+# ACTION may compute yylval for instance, using "res" as token type,
+# and "toknum" as the number of calls to yylex (starting at 0).
+m4_define([AT_YYLEX_PROTOTYPE],
+[int AT_NAME_PREFIX[]lex (]AT_YYLEX_FORMALS[)[]dnl
+])
+
+m4_define([AT_YYLEX_DECLARE_EXTERN],
+[AT_YYLEX_PROTOTYPE;dnl
+])
+
+m4_define([AT_YYLEX_DECLARE],
+[static AT_YYLEX_DECLARE_EXTERN[]dnl
+])
+
+m4_define([AT_YYLEX_DEFINE],
+[[#include <assert.h>
+static
+]AT_YYLEX_PROTOTYPE[
+{
+  ]m4_bmatch([$1], [^\(".*"\)?$],
+             [[static char const input[] = ]m4_default([$1], [""])],
+             [[static int const input[] = ]$1])[;
+  static size_t toknum = 0;
+  int res;
+  ]AT_USE_LEX_ARGS[;
+  assert (toknum < sizeof input / sizeof input[0]);
+  res = input[toknum++];
+  ]$2[;]AT_LOCATION_IF([[
+  ]AT_LOC_FIRST_LINE[ = ]AT_LOC_LAST_LINE[ = 1;
+  ]AT_LOC_FIRST_COLUMN[ = ]AT_LOC_LAST_COLUMN[ = toknum;]])[
+  return res;
+}]dnl
+])
+
+# AT_YYERROR_PROTOTYPE
+# AT_YYERROR_DECLARE_EXTERN
+# AT_YYERROR_DECLARE
+# AT_YYERROR_DEFINE
+# -------------------------
+# Must be called inside a AT_BISON_OPTION_PUSHDEFS/POPDEFS pair.
+m4_define([AT_YYERROR_FORMALS],
+[m4_case(AT_LANG,
+[c], [AT_YYERROR_ARG_LOC_IF([AT_YYLTYPE *llocp, ])[const char *msg]])[]dnl
+])
+
+m4_define([AT_YYERROR_PROTOTYPE],
+[m4_case(AT_LANG,
+[c], [[void ]AT_NAME_PREFIX[error (]AT_YYERROR_FORMALS[)]])[]dnl
+])
+
+m4_define([AT_YYERROR_DECLARE_EXTERN],
+[m4_case(AT_LANG,
+[c], [AT_YYERROR_PROTOTYPE;])[]dnl
+])
+
+m4_define([AT_YYERROR_DECLARE],
+[m4_case(AT_LANG,
+[c], [static AT_YYERROR_DECLARE_EXTERN])[]dnl
+])
+
+m4_define([AT_YYERROR_DEFINE],
+[m4_case(AT_LANG,
+[c], [[#include <stdio.h>
+/* A C error reporting function.  */
+static
+]AT_YYERROR_PROTOTYPE[
+{
+]AT_YYERROR_SEES_LOC_IF([[
+  fprintf (stderr, "%d.%d",
+           ]AT_LOC_FIRST_LINE[, ]AT_LOC_FIRST_COLUMN[);
+  if (]AT_LOC_FIRST_LINE[ != ]AT_LOC_LAST_LINE[)
+    fprintf (stderr, "-%d.%d",
+             ]AT_LOC_LAST_LINE[,  ]AT_LOC_LAST_COLUMN[ - 1);
+  else if (]AT_LOC_FIRST_COLUMN[ != ]AT_LOC_LAST_COLUMN[ - 1)
+    fprintf (stderr, "-%d",
+             ]AT_LOC_LAST_COLUMN[ - 1);
+  fprintf (stderr, ": ");]])[
+  fprintf (stderr, "%s\n", msg);
+}]],
+[c++], [[/* A C++ error reporting function.  */
+void
+]AT_NAME_PREFIX[::parser::error (]AT_LOCATION_IF([[const location_type& l, ]])[const std::string& m)
+{  std::cerr << ]AT_LOCATION_IF([l << ": " << ])[m << std::endl;
+}]],
+[java], [AT_LOCATION_IF([[public void yyerror (Calc.Location l, String s)
+{
+    if (l == null)
+      System.err.println (s);
+    else
+      System.err.println (l + ": " + s);
+  }
+]], [[
+  public void yyerror (String s)
+  {
+    System.err.println (s);
+  }]])],
+[m4_fatal([$0: invalid language: ]AT_LANG)])dnl
+])
+
+
+## --------------- ##
+## Running Bison.  ##
+## --------------- ##
+

 # AT_BISON_CHECK(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
 # -------------------------------------------------
 # AT_BISON_CHECK(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
 # -------------------------------------------------

+# High-level routine that may call bison several times, under different
+# conditions.
+#

 # Check Bison by invoking `bison BISON_ARGS'.  BISON_ARGS should not contain
 # shell constructs (such as redirection or pipes) that would prevent
 # appending additional command-line arguments for bison. OTHER_AT_CHECK_ARGS
 # Check Bison by invoking `bison BISON_ARGS'.  BISON_ARGS should not contain
 # shell constructs (such as redirection or pipes) that would prevent
 # appending additional command-line arguments for bison. OTHER_AT_CHECK_ARGS


@@ -267,12 +442,61 @@ $2])
 #
 #   4. If stderr contains a warning, -Wnone and --warnings=none suppress it.
 m4_define([AT_BISON_CHECK],
 #
 #   4. If stderr contains a warning, -Wnone and --warnings=none suppress it.
 m4_define([AT_BISON_CHECK],

-[m4_if(m4_quote($2), [0], [AT_BISON_CHECK_XML($@)],
-       m4_quote($2), [], [AT_BISON_CHECK_XML($@)])
+[m4_null_if([$2], [AT_BISON_CHECK_XML($@)])

 AT_BISON_CHECK_NO_XML($@)])
 
 AT_BISON_CHECK_NO_XML($@)])
 

-m4_define([AT_BISON_WERROR_MSG],
-          [[bison: warnings being treated as errors]])
+# AT_BISON_CHECK_(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
+# --------------------------------------------------
+# Low-level macro to run bison once.
+m4_define([AT_BISON_CHECK_],
+[AT_CHECK(AT_QUELL_VALGRIND[[ bison ]]$@)])
+
+
+# AT_BISON_CHECK_WARNINGS(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
+# ----------------------------------------------------------
+# Check that warnings (if some are expected) are correctly
+# turned into errors with -Werror, etc.
+m4_define([AT_BISON_CHECK_WARNINGS],
+[m4_if(m4_bregexp([$4], [: warning: ]), [-1], [],
+      [m4_null_if([$2], [AT_BISON_CHECK_WARNINGS_($@)])])])
+
+m4_define([AT_BISON_CHECK_WARNINGS_],
+[[# Defining POSIXLY_CORRECT causes bison to complain if options are
+# added after the grammar file name, so skip these checks in that
+# case.
+#
+# Don't just check if $POSIXLY_CORRECT is set, as Bash, when launched
+# as /bin/sh, sets the shell variable POSIXLY_CORRECT to y, but not
+# the environment variable.
+if env | grep '^POSIXLY_CORRECT=' >/dev/null; then :; else
+          ]AT_SAVE_SPECIAL_FILES[
+
+  # To avoid expanding it repeatedly, store specified stdout.
+  ]AT_DATA([expout], [$3])[
+
+  # Run with -Werror.
+  ]AT_BISON_CHECK_([$1[ -Werror]], [[1]], [expout], [stderr])[
+
+  # Build expected stderr up to and including the "warnings being
+  # treated as errors" message.
+  ]AT_DATA([[experr]], [$4])[
+  $PERL -pi -e 's{(.*): warning: (.*)\[-W(.*)\]$}
+                 {$][1: error: $][2\@<:@-Werror=$][3@:>@}' experr
+  ]AT_CHECK([[sed 's,.*/$,,' stderr 1>&2]], [[0]], [[]], [experr])[
+
+  # Now check --warnings=error.
+  cp stderr experr
+  ]AT_BISON_CHECK_([$1[ --warnings=error]], [[1]], [expout], [experr])[
+
+  # Now check -Wnone and --warnings=none by making sure that
+  # -Werror doesn't change the exit status when -Wnone or
+  # --warnings=none is specified.
+  ]AT_BISON_CHECK_([$1[ -Wnone -Werror]], [[0]], [expout])[
+  ]AT_BISON_CHECK_([$1[ --warnings=none -Werror]], [[0]], [expout])[
+
+  ]AT_RESTORE_SPECIAL_FILES[
+fi]dnl
+])

 
 # AT_BISON_CHECK_NO_XML(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
 # --------------------------------------------------------
 
 # AT_BISON_CHECK_NO_XML(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
 # --------------------------------------------------------


@@ -280,85 +504,8 @@ m4_define([AT_BISON_WERROR_MSG],
 # when a tortured grammar's XML is known to be too large for xsltproc to
 # handle.
 m4_define([AT_BISON_CHECK_NO_XML],
 # when a tortured grammar's XML is known to be too large for xsltproc to
 # handle.
 m4_define([AT_BISON_CHECK_NO_XML],

-[AT_CHECK(m4_if(m4_quote($2), [0], [], m4_quote($2), [], [],
-                [AT_QUELL_VALGRIND ])[[bison ]]$@)
-m4_if(m4_bregexp([$4], [: warning: ]), [-1], [],
-      m4_quote(m4_if(m4_quote($2), [], [0], [$2])), [0], [[
-        # POSIXLY_CORRECT=1 causes bison to complain if options are added
-        # after the grammar file name, so skip these checks in that case.
-        if test x"$POSIXLY_CORRECT" != x1; then
-          # Don't interfere with caller's files.
-          if test -f stderr; then mv stderr at-bison-check-stderr.bak; fi
-          if test -f experr; then mv experr at-bison-check-experr.bak; fi
-          if test -f expout; then mv expout at-bison-check-expout.bak; fi
-
-          # To avoid expanding it repeatedly, store specified stdout.
-          ]AT_DATA([expout], [$3])[
-
-          # Run with -Werror.
-          ]AT_CHECK(AT_QUELL_VALGRIND[[ bison ]$1[ -Werror]],
-                    [[1]], [expout], [stderr])[
-
-          # Build expected stderr up to and including the "warnings being
-          # treated as errors" message.
-          ]AT_DATA([[at-bison-check-warnings]], [$4])[
-          at_bison_check_first="` \
-            sed -n '/: warning: /=' at-bison-check-warnings \
-            | sed -n 1p \
-          `"
-          at_bison_check_first_tmp="` \
-            sed -n '/conflicts: [0-9].*reduce$/=' at-bison-check-warnings \
-            | sed -n 1p \
-          `"
-          if test $at_bison_check_first_tmp -lt $at_bison_check_first; then
-            at_bison_check_first=$at_bison_check_first_tmp
-          fi
-          if test $at_bison_check_first -gt 1; then
-            sed -n "1,`expr $at_bison_check_first - 1`"p \
-              at-bison-check-warnings > experr
-          fi
-          echo ']AT_BISON_WERROR_MSG[' >> experr
-
-          # Finish building expected stderr and check.  Unlike warnings,
-          # complaints cause bison to exit early.  Thus, with -Werror, bison
-          # does not necessarily report all warnings that it does without
-          # -Werror, but it at least reports one.
-          at_bison_check_last="`sed -n '$=' stderr`"
-          if test x"$at_bison_check_last" = x; then
-            at_bison_check_last=1
-          fi
-          at_bison_check_last="`expr $at_bison_check_last - 1`"
-          sed -n "$at_bison_check_first,$at_bison_check_last"p \
-            at-bison-check-warnings >> experr
-          ]AT_CHECK([[sed 's,.*/\(]AT_BISON_WERROR_MSG[\)$,\1,' \
-                      stderr 1>&2]], [[0]], [[]], [experr])[
-
-          # Now check --warnings=error.
-          cp stderr experr
-          ]AT_CHECK(AT_QUELL_VALGRIND[[ bison ]$1[ --warnings=error]],
-                    [[1]], [expout], [experr])[
-
-          # Now check -Wnone and --warnings=none by making sure that
-          # -Werror doesn't change the exit status when -Wnone or
-          # --warnings=none is specified.
-          ]AT_CHECK(AT_QUELL_VALGRIND[[ bison ]$1[ -Wnone -Werror]],
-                    [[0]], [expout])[
-          ]AT_CHECK(AT_QUELL_VALGRIND[[ bison ]$1[ --warnings=none \
-                    -Werror]], [[0]], [expout])[
-
-          # Restore caller's files.
-          if test -f at-bison-check-expout.bak; then
-            mv at-bison-check-expout.bak expout
-          fi
-          if test -f at-bison-check-experr.bak; then
-            mv at-bison-check-experr.bak experr
-          fi
-          if test -f at-bison-check-stderr.bak; then
-            mv at-bison-check-stderr.bak stderr
-          fi
-        fi
-      ]])
-])
+[AT_CHECK(m4_null_if([$2], [], [AT_QUELL_VALGRIND ])[[bison ]]$@)
+AT_BISON_CHECK_WARNINGS($@)])

 
 # AT_BISON_CHECK_XML(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
 # -----------------------------------------------------
 
 # AT_BISON_CHECK_XML(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
 # -----------------------------------------------------


@@ -366,8 +513,9 @@ m4_if(m4_bregexp([$4], [: warning: ]), [-1], [],
 # defined.  It doesn't make sense to invoke this macro if Bison is expected to
 # have a non-zero exit status.
 m4_define([AT_BISON_CHECK_XML],
 # defined.  It doesn't make sense to invoke this macro if Bison is expected to
 # have a non-zero exit status.
 m4_define([AT_BISON_CHECK_XML],

-[[if test x"$BISON_TEST_XML" = x1 && test x"$XSLTPROC" != x""; then
-  mkdir xml-tests]
+[[if test x"$BISON_TEST_XML" = x1 && test x"$XSLTPROC" != x""; then]
+  AT_SAVE_SPECIAL_FILES
+  [mkdir xml-tests]

   m4_pushdef([AT_BISON_ARGS],
              [m4_bpatsubsts([[$1]],
                             [--report(-file)?=[^][ ]*], [],
   m4_pushdef([AT_BISON_ARGS],
              [m4_bpatsubsts([[$1]],
                             [--report(-file)?=[^][ ]*], [],


@@ -375,10 +523,10 @@ m4_define([AT_BISON_CHECK_XML],
                             [--xml=[^][ ]*], [])])dnl
   # Don't combine these Bison invocations since we want to be sure that
   # --report=all isn't required to get the full XML file.
                             [--xml=[^][ ]*], [])])dnl
   # Don't combine these Bison invocations since we want to be sure that
   # --report=all isn't required to get the full XML file.

-  AT_CHECK([[bison --report=all --report-file=xml-tests/test.output \
+  AT_BISON_CHECK_([[--report=all --report-file=xml-tests/test.output \

              --graph=xml-tests/test.dot ]]AT_BISON_ARGS,
            [[0]], [ignore], [ignore])
              --graph=xml-tests/test.dot ]]AT_BISON_ARGS,
            [[0]], [ignore], [ignore])

-  AT_CHECK([[bison --xml=xml-tests/test.xml ]]AT_BISON_ARGS,
+  AT_BISON_CHECK_([[--xml=xml-tests/test.xml ]]AT_BISON_ARGS,

            [[0]], [ignore], [ignore])
   m4_popdef([AT_BISON_ARGS])dnl
   [cp xml-tests/test.output expout]
            [[0]], [ignore], [ignore])
   m4_popdef([AT_BISON_ARGS])dnl
   [cp xml-tests/test.output expout]


@@ -389,8 +537,9 @@ m4_define([AT_BISON_CHECK_XML],
   AT_CHECK([[$XSLTPROC \
              `]]AT_QUELL_VALGRIND[[ bison --print-datadir`/xslt/xml2dot.xsl \
              xml-tests/test.xml]], [[0]], [expout])
   AT_CHECK([[$XSLTPROC \
              `]]AT_QUELL_VALGRIND[[ bison --print-datadir`/xslt/xml2dot.xsl \
              xml-tests/test.xml]], [[0]], [expout])

-  [rm -rf xml-tests expout
-fi]])
+  [rm -rf xml-tests expout]
+  AT_RESTORE_SPECIAL_FILES
+[fi]])

 
 # AT_QUELL_VALGRIND
 # -----------------
 
 # AT_QUELL_VALGRIND
 # -----------------


@@ -406,6 +555,8 @@ fi]])
 m4_define([AT_QUELL_VALGRIND],
 [[[VALGRIND_OPTS="$VALGRIND_OPTS --leak-check=summary --show-reachable=no"; export VALGRIND_OPTS;]]])
 
 m4_define([AT_QUELL_VALGRIND],
 [[[VALGRIND_OPTS="$VALGRIND_OPTS --leak-check=summary --show-reachable=no"; export VALGRIND_OPTS;]]])
 

+
+

 ## ------------------------ ##
 ## Compiling C, C++ Files.  ##
 ## ------------------------ ##
 ## ------------------------ ##
 ## Compiling C, C++ Files.  ##
 ## ------------------------ ##


@@ -413,22 +564,38 @@ m4_define([AT_QUELL_VALGRIND],
 
 # AT_COMPILE(OUTPUT, [SOURCES = OUTPUT.c])
 # ----------------------------------------
 
 # AT_COMPILE(OUTPUT, [SOURCES = OUTPUT.c])
 # ----------------------------------------

-# Compile SOURCES into OUTPUT.  If OUTPUT does not contain '.',
-# assume that we are linking too; this is a hack.
+# Compile SOURCES into OUTPUT.
+#
+# If OUTPUT does not contain '.', assume that we are linking too,
+# otherwise pass "-c"; this is a hack.  The default SOURCES is OUTPUT
+# with trailing .o removed, and ".c" appended.

 m4_define([AT_COMPILE],
 m4_define([AT_COMPILE],

-[AT_CHECK([$CC $CFLAGS $CPPFLAGS m4_bmatch([$1], [[.]], [], [$LDFLAGS ])-o $1 m4_default([$2], [$1.c])[]m4_bmatch([$1], [[.]], [], [ $LIBS])],
-          0, [ignore], [ignore])])
+[AT_CHECK(m4_join([ ],
+                  [$CC $CFLAGS $CPPFLAGS],
+                  [m4_bmatch([$1], [[.]], [-c], [$LDFLAGS])],
+                  [-o $1],
+                  [m4_default([$2], [m4_bpatsubst([$1], [\.o$]).c])],
+                  [m4_bmatch([$1], [[.]], [], [$LIBS])]),
+           0, [ignore], [ignore])])

 
 # AT_COMPILE_CXX(OUTPUT, [SOURCES = OUTPUT.cc])
 
 # AT_COMPILE_CXX(OUTPUT, [SOURCES = OUTPUT.cc])

-# --------------------------------------------
-# Compile SOURCES into OUTPUT.  If OUTPUT does not contain '.',
-# assume that we are linking too; this is a hack.
-# If the C++ compiler does not work, ignore the test.
+# ---------------------------------------------
+# Compile SOURCES into OUTPUT.  If the C++ compiler does not work,
+# ignore the test.
+#
+# If OUTPUT does not contain '.', assume that we are linking too,
+# otherwise pass "-c"; this is a hack.  The default SOURCES is OUTPUT
+# with trailing .o removed, and ".cc" appended.

 m4_define([AT_COMPILE_CXX],
 [AT_KEYWORDS(c++)
 AT_CHECK([$BISON_CXX_WORKS], 0, ignore, ignore)
 m4_define([AT_COMPILE_CXX],
 [AT_KEYWORDS(c++)
 AT_CHECK([$BISON_CXX_WORKS], 0, ignore, ignore)

-AT_CHECK([$CXX $CXXFLAGS $CPPFLAGS m4_bmatch([$1], [[.]], [], [$LDFLAGS ])-o $1 m4_default([$2], [$1.cc])[]m4_bmatch([$1], [[.]], [], [ $LIBS])],
-        0, [ignore], [ignore])])
+AT_CHECK(m4_join([ ],
+                 [$CXX $CXXFLAGS $CPPFLAGS],
+                 [m4_bmatch([$1], [[.]], [-c], [$LDFLAGS])],
+                 [-o $1],
+                 [m4_default([$2], [m4_bpatsubst([$1], [\.o$]).cc])],
+                 [m4_bmatch([$1], [[.]], [], [$LIBS])]),
+         0, [ignore], [ignore])])

 
 # AT_JAVA_COMPILE(SOURCES)
 # ------------------------
 
 # AT_JAVA_COMPILE(SOURCES)
 # ------------------------


@@ -436,32 +603,56 @@ AT_CHECK([$CXX $CXXFLAGS $CPPFLAGS m4_bmatch([$1], [[.]], [], [$LDFLAGS ])-o $1
 # is not installed.
 m4_define([AT_JAVA_COMPILE],
 [AT_KEYWORDS(java)
 # is not installed.
 m4_define([AT_JAVA_COMPILE],
 [AT_KEYWORDS(java)

-AT_CHECK([[test -n "$CONF_JAVA" || exit 77
-           test -n "$CONF_JAVAC" || exit 77]])
+AT_SKIP_IF([[test -z "$CONF_JAVAC"]])
+AT_SKIP_IF([[test -z "$CONF_JAVA"]])

 AT_CHECK([[$SHELL ../../../javacomp.sh ]$1],
          [[0]], [ignore], [ignore])])
 
 AT_CHECK([[$SHELL ../../../javacomp.sh ]$1],
          [[0]], [ignore], [ignore])])
 

-# AT_FULL_COMPILE(OUTPUT, [OTHER])
-# --------------------------------
+# AT_LANG_COMPILE(OUTPUT, [SOURCES = OUTPUT.c]
+# --------------------------------------------
+# Compile SOURCES into OUTPUT.  Skip if compiler does not work.
+#
+# If OUTPUT does not contain '.', assume that we are linking too,
+# otherwise pass "-c"; this is a hack.  The default SOURCES is OUTPUT
+# with trailing .o removed, and ".c"/".cc" appended.
+m4_define([AT_LANG_COMPILE],
+[m4_case(AT_LANG,
+[c],    [AT_COMPILE([$1], [$2])],
+[c++],  [AT_COMPILE_CXX([$1], [$2])],
+[java], [AT_JAVA_COMPILE([$1.java], [$2])],
+        [m4_fatal([unknown language: ]m4_defn([AT_LANG]))])[]dnl
+])
+
+# AT_FULL_COMPILE(OUTPUT, [OTHER1], [OTHER2])
+# -------------------------------------------

 # Compile OUTPUT.y to OUTPUT.c, OUTPUT.cc, or OUTPUT.java, and then
 # compile it to OUTPUT or OUTPUT.class.  If OTHER is specified, compile
 # OUTPUT-OTHER.c, OUTPUT-OTHER.cc, or OUTPUT-OTHER.java to OUTPUT or
 # OUTPUT.java along with it.  Relies on AT_SKEL_CC_IF and
 # AT_SKEL_JAVA_IF.
 # Compile OUTPUT.y to OUTPUT.c, OUTPUT.cc, or OUTPUT.java, and then
 # compile it to OUTPUT or OUTPUT.class.  If OTHER is specified, compile
 # OUTPUT-OTHER.c, OUTPUT-OTHER.cc, or OUTPUT-OTHER.java to OUTPUT or
 # OUTPUT.java along with it.  Relies on AT_SKEL_CC_IF and
 # AT_SKEL_JAVA_IF.

-m4_define([AT_FULL_COMPILE], [
-  AT_SKEL_JAVA_IF([
-    AT_BISON_CHECK([[-o ]$1[.java ]$1[.y]])
-    AT_JAVA_COMPILE([$1[.java]]m4_ifval($2,
-                                        [[$1[.java ]$1[-]$2[.java]]]))
-  ], [
-    AT_SKEL_CC_IF([
-      AT_BISON_CHECK([[-o ]$1[.cc ]$1[.y]])
-      AT_COMPILE_CXX([$1]m4_ifval($2, [, [$1[.cc ]$1[-]$2[.cc]]]))
-    ], [
-      AT_BISON_CHECK([[-o ]$1[.c ]$1[.y]])
-      AT_COMPILE([$1]m4_ifval($2, [, [$1[.c ]$1[-]$2[.c]]]))
-    ])
-  ])
+m4_define([AT_FULL_COMPILE],
+[m4_case(AT_LANG,
+[java],
+  [AT_BISON_CHECK([-o $1.java $1.y])
+   AT_LANG_COMPILE([$1],
+                    m4_join([ ],
+                            [$1.java],
+                            m4_ifval($2, [[$1-$2.java]]),
+                           m4_ifval($3, [[$1-$3.java]])))],
+[c++],
+  [AT_BISON_CHECK([-o $1.cc $1.y])
+   AT_LANG_COMPILE([$1],
+                     m4_join([ ],
+                             [$1.cc],
+                             m4_ifval($2, [[$1-$2.cc]]),
+                           m4_ifval($3, [[$1-$3.cc]])))],
+[c],
+  [AT_BISON_CHECK([-o $1.c $1.y])
+   AT_LANG_COMPILE([$1],
+                  m4_join([ ],
+                          [$1.c],
+                          m4_ifval($2, [[$1-$2.c]]),
+                           m4_ifval($3, [[$1-$3.c]])))])

 ])
 
 
 ])
 
 


@@ -469,17 +660,26 @@ m4_define([AT_FULL_COMPILE], [
 ## Running a generated parser.  ##
 ## ---------------------------- ##
 
 ## Running a generated parser.  ##
 ## ---------------------------- ##
 

+

 # AT_PARSER_CHECK(COMMAND, EXIT-STATUS, EXPOUT, EXPERR, [PRE])
 # ------------------------------------------------------------
 # So that we can run `./testsuite PREPARSER='valgrind -q' for instance.
 # AT_PARSER_CHECK(COMMAND, EXIT-STATUS, EXPOUT, EXPERR, [PRE])
 # ------------------------------------------------------------
 # So that we can run `./testsuite PREPARSER='valgrind -q' for instance.

+#
+# Get rid of spurious messages when compiled with --coverage:
+# +profiling:/[...]/lib/fprintf.gcda:Merge mismatch for summaries

 m4_define([AT_PARSER_CHECK],
 m4_define([AT_PARSER_CHECK],

-[AT_CHECK([$5 $PREPARSER $1], [$2], [$3], [$4])])
+[AT_CHECK([$5 $PREPARSER $1], [$2], [$3], [stderr])
+AT_CHECK([sed >&2 -e '/^profiling:.*:Merge mismatch for summaries/d' stderr],
+         [0], [], [$4])
+])
+

 
 # AT_JAVA_PARSER_CHECK(COMMAND, EXIT-STATUS, EXPOUT, EXPERR, [PRE])
 # -----------------------------------------------------------------
 m4_define([AT_JAVA_PARSER_CHECK],
 [AT_CHECK([$5[ $SHELL ../../../javaexec.sh ]$1], [$2], [$3], [$4])])
 
 
 # AT_JAVA_PARSER_CHECK(COMMAND, EXIT-STATUS, EXPOUT, EXPERR, [PRE])
 # -----------------------------------------------------------------
 m4_define([AT_JAVA_PARSER_CHECK],
 [AT_CHECK([$5[ $SHELL ../../../javaexec.sh ]$1], [$2], [$3], [$4])])
 

+

 # AT_TEST_TABLES_AND_PARSE(TITLE, COND-VALUE, TEST-SPEC,
 #                          DECLS, GRAMMAR, INPUT,
 #                          BISON-STDERR, TABLES-OR-LAST-STATE,
 # AT_TEST_TABLES_AND_PARSE(TITLE, COND-VALUE, TEST-SPEC,
 #                          DECLS, GRAMMAR, INPUT,
 #                          BISON-STDERR, TABLES-OR-LAST-STATE,


@@ -559,12 +759,12 @@ m4_define([AT_TEST_TABLES_AND_PARSE],
 [m4_pushdef([AT_COND_CASE], [m4_case([$2], $][@)])
 
 AT_SETUP([$1])
 [m4_pushdef([AT_COND_CASE], [m4_case([$2], $][@)])
 
 AT_SETUP([$1])

-
+AT_BISON_OPTION_PUSHDEFS([$4])

 AT_DATA_GRAMMAR([[input.y]],
 [[%code {
   #include <stdio.h>
 AT_DATA_GRAMMAR([[input.y]],
 [[%code {
   #include <stdio.h>

-  static void yyerror (char const *msg);
-  static int yylex (void);
+  ]AT_YYERROR_DECLARE[
+  ]AT_YYLEX_DECLARE[

 }
 
 ]$4[
 }
 
 ]$4[


@@ -574,13 +774,7 @@ AT_DATA_GRAMMAR([[input.y]],
 ]$5[
 
 %%
 ]$5[
 
 %%

-
-static void
-yyerror (char const *msg)
-{
-  fprintf (stderr, "%s\n", msg);
-}
-
+]AT_YYERROR_DEFINE[

 static int
 yylex (void)
 {
 static int
 yylex (void)
 {


@@ -601,7 +795,7 @@ main (void)
 # In some versions of Autoconf, AT_CHECK invokes AS_ESCAPE before
 # expanding macros, so it corrupts some special characters in the
 # macros.  To avoid this, expand now and pass it the result with proper
 # In some versions of Autoconf, AT_CHECK invokes AS_ESCAPE before
 # expanding macros, so it corrupts some special characters in the
 # macros.  To avoid this, expand now and pass it the result with proper

-# string quotation.  Assume args 7 thru 12 expand to properly quoted
+# string quotation.  Assume args 7 through 12 expand to properly quoted

 # strings.
 
 m4_if(m4_index(m4_quote($3), [no-xml]), -1,
 # strings.
 
 m4_if(m4_index(m4_quote($3), [no-xml]), -1,


@@ -618,6 +812,17 @@ m4_if(m4_index(m4_quote($3), [last-state]), -1,
 
 $9
 
 
 $9
 

+# Canonical LR generates very large tables, resulting in very long
+# files with #line directives that may overflow what the standards
+# (C90 and C++98) guarantee: 32767.  In that case, GCC's -pedantic
+# will issue an error.
+#
+# There is no "" around `wc` since some indent the result.
+m4_bmatch([$4], [%define lr.type canonical-lr],
+[if test 32767 -lt `wc -l < input.c`; then
+  CFLAGS=`echo " $CFLAGS " | sed -e 's/ -pedantic //'`
+  CXXFLAGS=`echo " $CXXFLAGS " | sed -e 's/ -pedantic //'`
+fi])

 AT_COMPILE([[input]])
 
 AT_PARSER_CHECK([[./input]],
 AT_COMPILE([[input]])
 
 AT_PARSER_CHECK([[./input]],


@@ -625,6 +830,7 @@ AT_PARSER_CHECK([[./input]],
                 m4_ifval([$11], [m4_dquote($11)]),
                 m4_ifval([$12], [m4_dquote($12)]))
 
                 m4_ifval([$11], [m4_dquote($11)]),
                 m4_ifval([$12], [m4_dquote($12)]))
 

+AT_BISON_OPTION_POPDEFS

 AT_CLEANUP
 
 m4_popdef([AT_COND_CASE])])
 AT_CLEANUP
 
 m4_popdef([AT_COND_CASE])])


@@ -637,4 +843,15 @@ m4_popdef([AT_COND_CASE])])
 
 AT_INIT
 
 
 AT_INIT
 

+# Cannot assign CC and CFLAGS here, since atlocal is loaded after
+# options are processed, so we don't know the value of CXX and
+# CXXFLAGS yet.
+#
+# Note that it also means that command line values for CXX and
+# CXXFLAGS will not be propagated to CC and CFLAGS.
+AT_ARG_OPTION([compile-c-with-cxx],
+              [compile C parsers with the C++ compiler])
+
+AT_COLOR_TESTS
+

 AT_TESTED([bison])
 AT_TESTED([bison])