tests/base.at - external/github.com/Distrotech/autoconf - Git at Google

 #							-*- Autotest -*-

 AT_BANNER([Autoconf base layer.])

 # Copyright (C) 2000-2001, 2003, 2005-2015 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
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.


 ## ------------------------------- ##
 ## AC_REQUIRE: topological sort..  ##
 ## ------------------------------- ##

 # Check that dependencies are always properly honored.

 AT_SETUP([AC_REQUIRE: topological sort])
 AT_KEYWORDS([m4@&t@_require])

 AT_DATA([configure.ac],
 [[define([REQUIRE_AND_CHECK],
 [AC_REQUIRE([$1])
 test -z "$m4@&t@_translit([$1], [A-Z], [a-z])" && AS_EXIT(1)])

 AC_DEFUN([TEST1],
 [REQUIRE_AND_CHECK([TEST2a])
 REQUIRE_AND_CHECK([TEST2b])
 test1=set])

 AC_DEFUN([TEST2a],
 [test2a=set])

 AC_DEFUN([TEST2b],
 [REQUIRE_AND_CHECK([TEST3])
 test2b=set])

 AC_DEFUN([TEST3],
 [REQUIRE_AND_CHECK([TEST2a])
 test3=set])

 AS@&t@_INIT

 TEST1
 test -z "$test1" &&
   AC_MSG_ERROR([\$test1 is empty])
 AS_EXIT(0)
 ]])

 AT_CHECK_AUTOCONF
 AT_CHECK_CONFIGURE

 AT_CLEANUP


 ## --------------------------- ##
 ## AC_REQUIRE: error message.  ##
 ## --------------------------- ##

 # Check that the message mentions AC_DEFUN, not m4_defun.

 AT_SETUP([AC_REQUIRE: error message])
 AT_KEYWORDS([m4@&t@_require])
 AT_DATA([configure.ac],
 [[AC_REQUIRE([AC_PROG_CC])
 ]])

 AT_CHECK_AUTOCONF([], [1], [],
 [[configure.ac:1: error: AC_REQUIRE(AC_PROG_CC): cannot be used outside of an AC_DEFUN'd macro
 configure.ac:1: the top level
 autom4te: m4 failed with exit status: 1
 ]])
 AT_CLEANUP


 ## ----------------------------------------------- ##
 ## AC_REQUIRE and AC_DEFUN_ONCE: Require, expand.  ##
 ## ----------------------------------------------- ##

 AT_SETUP([AC_REQUIRE & AC_DEFUN_ONCE: [Require, expand]])
 AT_KEYWORDS([m4@&t@_require m4@&t@_require_once])

 AT_DATA([configure.ac],
 [[AC_DEFUN([TEST],
 [AC_REQUIRE([MULTI_TEST])
 AC_REQUIRE([SINGLE_TEST])])

 AC_DEFUN([MULTI_TEST],
 [multi_test=".$multi_test"])

 AC_DEFUN_ONCE([SINGLE_TEST],
 [single_test=".$single_test"])

 AS@&t@_INIT

 TEST
 TEST
 MULTI_TEST
 MULTI_TEST
 SINGLE_TEST
 SINGLE_TEST

 case $multi_test:$single_test in
   ...:. ) AS_EXIT(0);;
   ...:* ) AC_MSG_ERROR([DEFUN_ONCE is broken]);;
   *:.   ) AC_MSG_ERROR([DEFUN is broken (Wow, congrats!)]);;
 esac
 ]])

 AT_CHECK_AUTOCONF([], 0, [])

 AT_CHECK_CONFIGURE

 AT_CLEANUP


 ## ----------------------------------------------- ##
 ## AC_REQUIRE and AC_DEFUN_ONCE: Expand, require.  ##
 ## ----------------------------------------------- ##

 AT_SETUP([AC_REQUIRE & AC_DEFUN_ONCE: [Expand, require]])
 AT_KEYWORDS([m4@&t@_require m4@&t@_require_once])

 AT_DATA([configure.ac],
 [[AC_DEFUN([TEST],
 [AC_REQUIRE([MULTI_TEST])
 AC_REQUIRE([SINGLE_TEST])])

 AC_DEFUN([MULTI_TEST],
 [multi_test=".$multi_test"])

 AC_DEFUN_ONCE([SINGLE_TEST],
 [single_test=".$single_test"])

 AS@&t@_INIT

 MULTI_TEST
 MULTI_TEST
 SINGLE_TEST
 SINGLE_TEST
 TEST
 TEST

 case $multi_test:$single_test in
   ..:. ) AS_EXIT(0);;
   ..:* ) AC_MSG_ERROR([DEFUN_ONCE is broken]);;
   *:.  ) AC_MSG_ERROR([DEFUN is broken (Wow, congrats!)]);;
      * ) AC_MSG_ERROR([received `$multi_test:$single_test']);;
 esac
 ]])

 AT_CHECK_AUTOCONF([], 0, [])
 AT_CHECK_CONFIGURE

 AT_CLEANUP


 ## ------------------------- ##
 ## AC_REQUIRE & AC_PROVIDE.  ##
 ## ------------------------- ##

 AT_SETUP([AC_REQUIRE & AC_PROVIDE])
 AT_KEYWORDS([m4@&t@_require])

 AT_DATA([configure.ac],
 [[AC_DEFUN([TEST],
 [AC_REQUIRE([INNER_TEST])])

 AC_DEFUN([INNER_TEST],
 [inner_test=".$inner_test"])

 AS@&t@_INIT

 AC_PROVIDE([INNER_TEST])
 TEST

 case $inner_test in
   "" ) AS_EXIT(0);;
   *  ) AC_MSG_ERROR([received `$inner_test']);;
 esac
 ]])

 AT_CHECK_AUTOCONF
 AT_CHECK_CONFIGURE

 AT_CLEANUP


 ## -------- ##
 ## AC_INIT. ##
 ## -------- ##

 # Make sure AC_INIT sets PACKAGE_TARNAME properly.

 AT_SETUP([AC_INIT])

 AT_DATA([configure.ac],
 [[AC_INIT([GNU fu], [1.0], [bug-fu@gnu.org])
 ]])

 AT_CHECK_AUTOCONF
 AT_CHECK_CONFIGURE([-q])

 # Ensure we get the expected definition:
 AT_CHECK([grep "^PACKAGE_TARNAME='fu'\$" configure], [], [ignore])

 AT_CLEANUP


 ## ------------------------------------- ##
 ## AC_INIT with unusual version strings. ##
 ## ------------------------------------- ##

 AT_SETUP([AC_INIT with unusual version strings])

 AT_DATA([configure.ac],
 [[AC_INIT([GNU String++ with  spaces (foo)],
 	  [2.48++  (2010-07-03)], [[http://example.com/?a=b&c=d#e]], [clisp])
 AC_OUTPUT
 ]])

 if echo 'ab*c' | grep -F 'ab*c' >/dev/null 2>&1; then
   FGREP="grep -F"
 else
   FGREP=fgrep
 fi

 AT_CHECK_AUTOCONF([-Werror])
 AT_CHECK_CONFIGURE([-q])
 AT_CHECK_CONFIGURE([--help], [], [stdout])
 AT_CHECK([[$FGREP 'com/?a=b&c=d#e' stdout]], [], [ignore])
 AT_CHECK_CONFIGURE([--version], [], [stdout])
 AT_CHECK([$FGREP 'GNU String++ with  spaces (foo)' stdout], [], [ignore])
 AT_CHECK([$FGREP '2.48++  (2010-07-03)' stdout], [], [ignore])

 AT_CHECK([./config.status --help], [], [stdout])
 AT_CHECK([[$FGREP 'com/?a=b&c=d#e' stdout]], [], [ignore])
 AT_CHECK([./config.status --version], [], [stdout])
 AT_CHECK([$FGREP 'GNU String++ with  spaces (foo)' stdout], [], [ignore])
 AT_CHECK([$FGREP '2.48++  (2010-07-03)' stdout], [], [ignore])

 AT_DATA([configure.ac],
 [[AC_INIT([GNU "String++"],
 	  [2.48], [http://example.com/], [clisp])
 AC_OUTPUT
 ]])

 AT_CHECK_AUTOCONF([-Werror], [1], [ignore], [stderr])
 AT_CHECK([grep 'AC_INIT: not a literal: ' stderr], [], [ignore])

 AT_DATA([configure.ac],
 [[AC_INIT([GNU String++],
 	  ['codename' 2.48], [http://example.com/], [clisp])
 AC_OUTPUT
 ]])

 AT_CHECK_AUTOCONF([-Werror], [1], [ignore], [stderr])
 AT_CHECK([grep 'AC_INIT: not a literal: ' stderr], [], [ignore])

 AT_DATA([configure.ac],
 [[AC_INIT([GNU
 String++], [2.48], [http://example.com/], [clisp])
 AC_OUTPUT
 ]])

 AT_CHECK_AUTOCONF([-Werror], [1], [ignore], [stderr])
 AT_CHECK([grep 'AC_INIT: not a literal: ' stderr], [], [ignore])

 AT_CLEANUP


 ## -------------- ##
 ## AC_COPYRIGHT.  ##
 ## -------------- ##

 # Ensure the FSF notice as well as the user-provided one are present
 # in the head of the testsuite as well as the --version output.

 AT_SETUP([AC@&t@_COPYRIGHT])

 AT_DATA([configure.ac],
 [[AC_INIT([GNU fu], [1.0])
 AC_COPYRIGHT([[This is just a test notice, not a real one, so let's avoid
 words that may be matched by scanners for legal things,
 causing extra work for distributors.
 Multi-line values should be supported.
 ]])
 ]])

 AT_CHECK_AUTOCONF
 AT_CHECK_CONFIGURE([--version], [], [stdout])
 AT_CHECK([grep 'Copyright.*Free Software Foundation' stdout], [], [ignore])
 AT_CHECK([grep 'This is just a test notice' stdout], [], [ignore])
 AT_CHECK([sed -ne 50q -e '/Copyright/{' -e N -e N -e N -e N -e 's/#//g' ]dnl
 	 [    -e 's/\n//g' -e p -e '}' configure ]dnl
          [  | grep 'Copyright.*Free Software Foundation'],
 	 [], [ignore])
 AT_CHECK([sed 50q configure | grep 'This is just a test notice'], [], [ignore])

 AT_CLEANUP


 ## ---------------- ##
 ## AC_CACHE_CHECK.  ##
 ## ---------------- ##

 # Make sure AC_CACHE_CHECK is silent with -q.
 # Also make sure we warn about cache id's not named with `_cv_'.

 AT_SETUP([AC_CACHE_CHECK])
 AT_KEYWORDS([CONFIG_SITE])

 # Don't let a config.site file affect this test.
 AS_UNSET([CONFIG_SITE])

 AT_DATA([configure.ac],
 [[AC_INIT
 # m4_define([ac_nothing], [ac_cv_absolutely_nothing])
 AC_CACHE_CHECK([for nothing],
 	       [ac_nothing],
 	       [ac_nothing=found])

 AC_MSG_CHECKING([for some other variable])
 commands_to_set_it_was_run=false
 AC_CACHE_VAL([my_cv_variable], [
 # FOO
 commands_to_set_it_was_run=true
 my_cv_variable=true
 ])
 AC_MSG_RESULT([$my_cv_variable])

 # Ensure that the result is available at this point.
 if ${my_cv_variable+false} :; then
   AC_MSG_ERROR([AC@&@&t@t@_CACHE_VAL did not ensure that the cache variable was set])
 fi

 # AC_CACHE_SAVE should be enough here, no need for AC_OUTPUT.
 AC_CACHE_SAVE
 ]])

 AT_CHECK_AUTOCONF([], [], [], [stderr])
 AT_CHECK([grep 'must contain _cv_ to be cached' stderr], [], [ignore])

 # Do not warn about defines:
 sed 's/^# m4_define/m4_define/' configure.ac > t
 mv -f t configure.ac
 AT_CHECK_AUTOCONF
 AT_CHECK_CONFIGURE([-q])

 sed '/m4_define/d; s/ac_nothing/ac_cv_nothing/' configure.ac > t
 mv -f t configure.ac
 AT_CHECK_AUTOCONF
 AT_CHECK_CONFIGURE([-q])

 # Print a message saying that the result was cached, iff it was cached.
 AT_CHECK_CONFIGURE([], [], [stdout])
 AT_CHECK([grep 'cached' stdout], [1])
 AT_CHECK_CONFIGURE([my_cv_variable='yes it is set'], [], [stdout])
 AT_CHECK([grep 'cached.*yes it is set' stdout], [], [ignore])

 # --cache-file is honored and has caching semantics.
 AT_CHECK_CONFIGURE([--cache-file=foobar.cache], [], [stdout])
 AT_CHECK([grep 'cached' stdout], [1])
 AT_CHECK([test ! -f config.cache])
 AT_CHECK([grep 'my_cv_variable.*true' foobar.cache], [], [ignore])
 AT_CHECK_CONFIGURE([--cache-file=foobar.cache], [], [stdout])
 AT_CHECK([grep 'some other variable.*cached.*true' stdout], [], [ignore])

 # A setting on the command line overrides the cache.
 AT_CHECK_CONFIGURE([--cache-file=foobar.cache my_cv_variable='override'], [], [stdout])
 AT_CHECK([grep 'cached.*override' stdout], [], [ignore])
 AT_CHECK([grep 'my_cv_variable.*override' foobar.cache], [], [ignore])

 # Values containing braces need special internal treatment.
 AT_CHECK_CONFIGURE([-C ac_cv_nothing='{' my_cv_variable='contains } brace'],
 		   [], [stdout])
 AT_CHECK([grep 'ac_cv_nothing.*{' config.cache], [], [ignore])
 AT_CHECK([grep 'my_cv_variable.*contains } brace' config.cache], [], [ignore])
 AT_CHECK_CONFIGURE([-C], [], [stdout])
 AT_CHECK([grep 'nothing.*{' stdout], [], [ignore])
 AT_CHECK([grep 'some other variable.*contains } brace' stdout], [], [ignore])
 rm -f config.cache

 # Diagnose common side-effects that are errors in COMMANDS-TO-SET-IT:
 sed 's/^# FOO/AC_DEFINE([some-define], [1], [oooh.])/' configure.ac > t
 mv -f t configure.ac
 AT_CHECK_AUTOCONF([], [], [], [stderr])
 AT_CHECK([grep 'suspicious.*AC_DEFINE' stderr], [], [ignore])

 sed 's/^AC_DEFINE.*/AC_SUBST([some_substitution], [oooh.])/' configure.ac > t
 mv -f t configure.ac
 AT_CHECK_AUTOCONF([], [], [], [stderr])
 AT_CHECK([grep 'suspicious.*AC_SUBST' stderr], [], [ignore])

 # Ensure the examples from the manual work as intended.
 # Taken from autoconf.texi:Caching Results
 AT_DATA([configure.ac],
 [[AC_INIT
 AC_DEFUN([AC_SHELL_TRUE],
 [AC_CACHE_CHECK([whether true(1) works], [my_cv_shell_true_works],
                 [my_cv_shell_true_works=no
                  (true) 2>/dev/null && my_cv_shell_true_works=yes
                  if test "x$my_cv_shell_true_works" = xyes; then
                    AC_DEFINE([TRUE_WORKS], [1],
                              [Define if `true(1)' works properly.])
                  fi])
 ])
 AC_SHELL_TRUE
 ]])
 AT_CHECK_AUTOCONF([-Werror], [1], [], [stderr])
 AT_CHECK([grep 'suspicious.*AC_DEFINE' stderr], [], [ignore])

 # Taken from autoconf.texi:Caching Results
 AT_DATA([configure.ac],
 [[AC_INIT
 AC_DEFUN([AC_SHELL_TRUE],
 [AC_CACHE_CHECK([whether true(1) works], [my_cv_shell_true_works],
                 [my_cv_shell_true_works=no
                  (true) 2>/dev/null && my_cv_shell_true_works=yes])
  if test "x$my_cv_shell_true_works" = xyes; then
    AC_DEFINE([TRUE_WORKS], [1],
              [Define if `true(1)' works properly.])
  fi
 ])
 AC_SHELL_TRUE
 AC_OUTPUT
 ]])
 AT_CHECK_AUTOCONF([-Werror])
 AT_CHECK_CONFIGURE([-C], [], [stdout])
 AT_CHECK([grep my_cv_shell_true_works config.cache], [], [ignore])
 AT_CHECK([grep 'true.*works.*yes' stdout], [], [ignore])

 AT_CHECK_CONFIGURE([--config-cache], [], [stdout])
 AT_CHECK([grep 'true.*works.*cached.*yes' stdout], [], [ignore])

 # config.status only pays attention to the cache file with --recheck.
 AT_CHECK([./config.status], [], [stdout])
 AT_CHECK([grep cache stdout], [1])
 AT_CHECK([./config.status --recheck], [], [stdout])
 AT_CHECK([grep cache stdout], [0], [ignore])

 # By default, configure uses no cache file, neither loading nor updating it.
 : > a-stamp-file
 AT_CHECK_CONFIGURE([], [], [stdout])
 AT_CHECK([grep cache stdout], [1])
 AT_CHECK([LC_ALL=C ls -t config.cache a-stamp-file | sed 1q | grep config.cache], [1])

 # Using a symlinked cache file works.
 : > cache
 rm -f config.cache
 AS_LN_S([cache], [config.cache])
 AT_CHECK_CONFIGURE([-C])
 # Either the system does not support symlinks, or the symlinked-to file
 # should be updated.
 AT_CHECK([test -s cache || test ! -h config.cache])

 # config.site can specify a site-wide cache, accumulating information.
 # Also test that we don't run afoul of sourcing a file with leading -.
 AT_DATA([-config.site],
 [[cache_file=sitecache
 ]])
 AT_DATA([sitecache],
 [[my_cv_some_preset_cache_var=yes
 ]])
 CONFIG_SITE=-config.site
 export CONFIG_SITE
 AT_CHECK_CONFIGURE
 AT_CHECK([grep my_cv_some_preset_cache_var sitecache], [], [ignore])
 AT_CHECK([grep my_cv_shell_true_works sitecache], [], [ignore])
 AT_CHECK_CONFIGURE([], [], [stdout])
 AT_CHECK([grep 'whether true.*works.*cached' stdout], [], [ignore])

 dnl Until we can find a way to avoid catastrophic failure,
 dnl skip the rest of this test on such shells.
 echo 'if' > syntax
 AT_CHECK([${CONFIG_SHELL-$SHELL} -c 'case `. ./syntax; echo $?` in
             0|"") exit 77;; esac'], [0], [ignore], [ignore])

 # Check that config cache scripts must be well-formed.
 AT_DATA([bad.site],
 [[fi
 ]])
 CONFIG_SITE=$PWD/bad.site
 AT_CHECK_CONFIGURE([ || exit 1], [1], [stdout], [stderr])
 AT_CHECK([grep 'failed to load site script' stderr], [], [ignore], [ignore],
 	 [AT_CHECK([grep 'whether true' stdout], [1])])

 # However, a missing file is ignored.
 CONFIG_SITE=./no-such-file
 AT_CHECK_CONFIGURE

 AT_CLEANUP


 ## --------------- ##
 ## AC_CACHE_LOAD.  ##
 ## --------------- ##

 # Test AC_CACHE_LOAD.

 AT_SETUP([AC_CACHE_LOAD])

 AT_DATA([configure.ac],
 [[AC_INIT
 $some_test_code
 AC_CACHE_LOAD
 AC_MSG_NOTICE([some_cv_variable is $some_cv_variable])
 AC_OUTPUT
 ]])
 AT_CHECK_AUTOCONF
 AS_UNSET([some_test_code])
 AT_DATA([new-cache],
 [[some_cv_variable=value-from-new-cache
 ]])
 AT_CHECK_CONFIGURE([some_test_code='eval cache_file=new-cache'], [], [stdout])
 AT_CHECK([grep 'some_cv_variable.*value-from-new-cache' stdout], [], [ignore])

 AT_CLEANUP


 ## ---------------- ##
 ## AC_COMPUTE_INT.  ##
 ## ---------------- ##

 # Make sure AC_COMPUTE_INT fails properly.

 AT_SETUP([AC_COMPUTE_INT])

 AT_DATA([configure.ac],
 [[AC_INIT
 AC_COMPUTE_INT([invalid_expression],
 	       [**0**],
 	       [],
 	       [invalid_expression=failed])
 test "$invalid_expression" = failed ||
   AC_MSG_ERROR([**0** evaluated to $invalid_expression instead of failing])
 ]])

 AT_CHECK_AUTOCONF
 AT_CHECK_CONFIGURE

 AT_CLEANUP


 ## ---------------- ##
 ## AC_TRY_COMMAND.  ##
 ## ---------------- ##

 AT_SETUP([AC_TRY_COMMAND])

 AT_DATA([configure.ac],
 [[AC_INIT

 if AC_TRY_COMMAND([(echo "The Cat in the Hat";
 		    echo "The Hat in the Cat" >&2) |
 		   grep \^The\ Cat\ in\ the\ Hat\$ >/dev/null]); then
   :
 else
   AC_MSG_ERROR([didn't see the Cat in the Hat])
 fi

 if AC_TRY_COMMAND([(echo "The Cat in the Hat";
 		    echo "The Hat in the Cat" >&2) |
 		   grep \^The\ Hat\ in\ the\ Cat\$ >/dev/null]); then
   AC_MSG_ERROR([saw the Hat in the Cat])
 fi
 ]])

 AT_CHECK_AUTOCONF
 AT_CHECK_CONFIGURE([-q])

 AT_CLEANUP


 ## ------------ ##
 ## Input/Output ##
 ## ------------ ##

 AT_SETUP([Input/Output])

 AT_DATA([configure.ac],
 [[AC_INIT
 cat <&AS@&t@_ORIGINAL_STDIN_FD >&AS@&t@_MESSAGE_FD
 ]])
 AT_CHECK_AUTOCONF
 AT_CHECK([echo Hello | CONFIG_SITE=/dev/null ./configure $configure_options | grep -v 'configure: loading site script '],, [Hello
 ])
 AT_CHECK([echo Hello | CONFIG_SITE=/dev/null ./configure $configure_options --silent])

 AT_CLEANUP


 ## ------------------- ##
 ## configure arguments ##
 ## ------------------- ##

 AT_SETUP([configure arguments])

 AT_DATA([configure.ac],
 [[AC_INIT
 echo "$@"
 ]])

 AT_CHECK_AUTOCONF
 AT_CHECK_CONFIGURE([FOO=bar --enable-baz --without-zork --silent], [0], [stdout], [ignore])
 AT_CHECK([grep 'FOO=bar --enable-baz --without-zork --silent' stdout], [0], [ignore], [ignore])

 dnl check that syntax error is detected
 AT_CHECK_CONFIGURE([=], [1], [], [ignore], [ignore])
 AT_CHECK_CONFIGURE([1=2], [1], [], [ignore], [ignore])

 AT_CLEANUP


 ## ------------------------------ ##
 ## AC_ARG_ENABLE and AC_ARG_WITH. ##
 ## ------------------------------ ##

 AT_SETUP([AC_ARG_ENABLE and AC_ARG_WITH])

 AT_DATA_M4SH([configure.ac],
 [[AC_INIT
 # Taken from autoconf.texi:Pretty Help Strings.
 AC_ARG_WITH([foo],
   [AS_HELP_STRING([--with-foo],
      [use foo (default is no)])],
   [use_foo=$withval],
   [use_foo=no])
 AC_ARG_WITH([c++],
   [AS_HELP_STRING([--with-c++],
      [with c++])],
   [choice_with=$withval])
 AC_ARG_ENABLE([c++],
   [AS_HELP_STRING([--enable-c++],
      [enable c++])],
   [choice_enable=$enableval])
 echo "use_foo: $use_foo"
 echo "with_c++: $with_c__, $choice_with"
 echo "enable_c++: $enable_c__, $choice_enable"
 ]])

 AT_CHECK_AUTOCONF
 AT_CHECK_CONFIGURE([--help | grep foo], [0],
 [[  --with-foo              use foo (default is no)
 ]], [ignore])
 AT_CHECK_CONFIGURE([--with-foo=yes --with-c++ --disable-c++],
   [], [stdout], [ignore])
 AT_CHECK([grep 'use_foo: yes' stdout], [], [ignore])
 AT_CHECK([grep 'with_c++: yes, yes' stdout], [], [ignore])
 AT_CHECK([grep 'enable_c++: no, no' stdout], [], [ignore])
 AT_CHECK([grep 'unrecognized option' stdout], [1])
 AT_CHECK_CONFIGURE([--without-foo --with-c++=no --enable-c++=maybe],
   [], [stdout], [ignore])
 AT_CHECK([grep 'use_foo: no' stdout], [], [ignore])
 AT_CHECK([grep 'with_c++: no, no' stdout], [], [ignore])
 AT_CHECK([grep 'enable_c++: maybe, maybe' stdout], [], [ignore])
 AT_CHECK([grep 'unrecognized option' stdout], [1])
 AT_CHECK_CONFIGURE([], [], [stdout], [ignore])
 AT_CHECK([grep 'use_foo: no' stdout], [], [ignore])
 AT_CHECK([grep 'with_c++: , $' stdout], [], [ignore])
 AT_CHECK([grep 'enable_c++: , $' stdout], [], [ignore])
 AT_CHECK([grep 'unrecognized option' stdout], [1])

 AT_CLEANUP


 ## --------------------- ##
 ## configure directories ##
 ## --------------------- ##

 AT_SETUP([configure directories])

 CONFIG_SITE=/dev/null
 export CONFIG_SITE

 AT_DATA([foo.in],
 [[prefix=@prefix@
 exec_prefix=@exec_prefix@
 libdir=@libdir@
 ]])

 AT_DATA([configure.ac],
 [[AC_INIT
 AC_CONFIG_FILES([foo])
 AC_OUTPUT
 ]])

 AT_CHECK_AUTOCONF
 dnl check that relative paths are rejected
 AT_CHECK_CONFIGURE([--libdir=.], [1], [ignore], [stderr])
 AT_CHECK([grep 'expected an absolute directory name for --libdir: \.' stderr],
 	 [0], [ignore])

 dnl check that extra slashes are stripped, and that defaults are not expanded
 AT_CHECK_CONFIGURE([--prefix=/usr//])
 AT_CHECK([cat foo], [0], [[prefix=/usr
 exec_prefix=${prefix}
 libdir=${exec_prefix}/lib
 ]])

 AT_CLEANUP

 ## ---------- ##
 ## AC_SUBST.  ##
 ## ---------- ##

 AT_SETUP([AC_SUBST])
 AT_KEYWORDS([AS@&t@_IDENTIFIER_IF])

 # Check that a valid variable name is used.
 AT_DATA([configure.ac],
 [[AC_INIT([test], [1])
 AC_SUBST([1], [bar])
 AC_OUTPUT
 ]])
 AT_CHECK_AUTOCONF([], [1], [], [stderr])
 AT_CHECK([grep 'not a valid shell variable' stderr], [], [ignore])

 AT_DATA([configure.ac],
 [[AC_INIT([test], [1])
 AC_SUBST([], [bar])
 AC_OUTPUT
 ]])
 AT_CHECK_AUTOCONF([], [1], [], [stderr])
 AT_CHECK([grep 'not a valid shell variable' stderr], [], [ignore])

 AT_DATA([configure.ac],
 [[AC_INIT([test], [1])
 AC_SUBST([*], [bar])
 AC_OUTPUT
 ]])
 AT_CHECK_AUTOCONF([], [1], [], [stderr])
 AT_CHECK([grep 'not a valid shell variable' stderr], [], [ignore])

 # Make sure AC_SUBST handles variables as expected.
 AT_DATA([file.in],
 [[@FOO@
 @BAR@
 FOO
 ]])
 AT_DATA([configure.ac],
 [[AC_INIT([test], [0])
 m4_define([FOO], [baz])
 AC_SUBST([FOO], [bar])
 BAR=one
 AC_SUBST([B@&t@AR])
 BAR=two
 AC_CONFIG_FILES([file])
 AC_OUTPUT
 ]])

 AT_CHECK_AUTOCONF([], [], [], [stderr])
 AT_CHECK_CONFIGURE
 AT_CHECK([cat file], [],
 [[bar
 two
 FOO
 ]])

 AT_CLEANUP
	# -- Autotest --

	AT_BANNER([Autoconf base layer.])

	# Copyright (C) 2000-2001, 2003, 2005-2015 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
	# the Free Software Foundation, either version 3 of the License, or
	# (at your option) any later version.
	#
	# This program is distributed in the hope that it will be useful,
	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	# GNU General Public License for more details.
	#
	# You should have received a copy of the GNU General Public License
	# along with this program. If not, see <http://www.gnu.org/licenses/>.


	## ------------------------------- ##
	## AC_REQUIRE: topological sort.. ##
	## ------------------------------- ##

	# Check that dependencies are always properly honored.

	AT_SETUP([AC_REQUIRE: topological sort])
	AT_KEYWORDS([m4@&t@_require])

	AT_DATA([configure.ac],
	[[define([REQUIRE_AND_CHECK],
	[AC_REQUIRE([$1])
	test -z "$m4@&t@_translit([$1], [A-Z], [a-z])" && AS_EXIT(1)])

	AC_DEFUN([TEST1],
	[REQUIRE_AND_CHECK([TEST2a])
	REQUIRE_AND_CHECK([TEST2b])
	test1=set])

	AC_DEFUN([TEST2a],
	[test2a=set])

	AC_DEFUN([TEST2b],
	[REQUIRE_AND_CHECK([TEST3])
	test2b=set])

	AC_DEFUN([TEST3],
	[REQUIRE_AND_CHECK([TEST2a])
	test3=set])

	AS@&t@_INIT

	TEST1
	test -z "$test1" &&
	AC_MSG_ERROR([\$test1 is empty])
	AS_EXIT(0)
	]])

	AT_CHECK_AUTOCONF
	AT_CHECK_CONFIGURE

	AT_CLEANUP


	## --------------------------- ##
	## AC_REQUIRE: error message. ##
	## --------------------------- ##

	# Check that the message mentions AC_DEFUN, not m4_defun.

	AT_SETUP([AC_REQUIRE: error message])
	AT_KEYWORDS([m4@&t@_require])
	AT_DATA([configure.ac],
	[[AC_REQUIRE([AC_PROG_CC])
	]])

	AT_CHECK_AUTOCONF([], [1], [],
	[[configure.ac:1: error: AC_REQUIRE(AC_PROG_CC): cannot be used outside of an AC_DEFUN'd macro
	configure.ac:1: the top level
	autom4te: m4 failed with exit status: 1
	]])
	AT_CLEANUP


	## ----------------------------------------------- ##
	## AC_REQUIRE and AC_DEFUN_ONCE: Require, expand. ##
	## ----------------------------------------------- ##

	AT_SETUP([AC_REQUIRE & AC_DEFUN_ONCE: [Require, expand]])
	AT_KEYWORDS([m4@&t@_require m4@&t@_require_once])

	AT_DATA([configure.ac],
	[[AC_DEFUN([TEST],
	[AC_REQUIRE([MULTI_TEST])
	AC_REQUIRE([SINGLE_TEST])])

	AC_DEFUN([MULTI_TEST],
	[multi_test=".$multi_test"])

	AC_DEFUN_ONCE([SINGLE_TEST],
	[single_test=".$single_test"])

	AS@&t@_INIT

	TEST
	TEST
	MULTI_TEST
	MULTI_TEST
	SINGLE_TEST
	SINGLE_TEST

	case $multi_test:$single_test in
	...:. ) AS_EXIT(0);;
	...:* ) AC_MSG_ERROR([DEFUN_ONCE is broken]);;
	*:. ) AC_MSG_ERROR([DEFUN is broken (Wow, congrats!)]);;
	esac
	]])

	AT_CHECK_AUTOCONF([], 0, [])

	AT_CHECK_CONFIGURE

	AT_CLEANUP



	## ----------------------------------------------- ##
	## AC_REQUIRE and AC_DEFUN_ONCE: Expand, require. ##
	## ----------------------------------------------- ##

	AT_SETUP([AC_REQUIRE & AC_DEFUN_ONCE: [Expand, require]])
	AT_KEYWORDS([m4@&t@_require m4@&t@_require_once])

	AT_DATA([configure.ac],
	[[AC_DEFUN([TEST],
	[AC_REQUIRE([MULTI_TEST])
	AC_REQUIRE([SINGLE_TEST])])

	AC_DEFUN([MULTI_TEST],
	[multi_test=".$multi_test"])

	AC_DEFUN_ONCE([SINGLE_TEST],
	[single_test=".$single_test"])

	AS@&t@_INIT

	MULTI_TEST
	MULTI_TEST
	SINGLE_TEST
	SINGLE_TEST
	TEST
	TEST

	case $multi_test:$single_test in
	..:. ) AS_EXIT(0);;
	..:* ) AC_MSG_ERROR([DEFUN_ONCE is broken]);;
	*:. ) AC_MSG_ERROR([DEFUN is broken (Wow, congrats!)]);;
	* ) AC_MSG_ERROR([received `$multi_test:$single_test']);;
	esac
	]])

	AT_CHECK_AUTOCONF([], 0, [])
	AT_CHECK_CONFIGURE

	AT_CLEANUP



	## ------------------------- ##
	## AC_REQUIRE & AC_PROVIDE. ##
	## ------------------------- ##

	AT_SETUP([AC_REQUIRE & AC_PROVIDE])
	AT_KEYWORDS([m4@&t@_require])

	AT_DATA([configure.ac],
	[[AC_DEFUN([TEST],
	[AC_REQUIRE([INNER_TEST])])

	AC_DEFUN([INNER_TEST],
	[inner_test=".$inner_test"])

	AS@&t@_INIT

	AC_PROVIDE([INNER_TEST])
	TEST

	case $inner_test in
	"" ) AS_EXIT(0);;
	* ) AC_MSG_ERROR([received `$inner_test']);;
	esac
	]])

	AT_CHECK_AUTOCONF
	AT_CHECK_CONFIGURE

	AT_CLEANUP


	## -------- ##
	## AC_INIT. ##
	## -------- ##

	# Make sure AC_INIT sets PACKAGE_TARNAME properly.

	AT_SETUP([AC_INIT])

	AT_DATA([configure.ac],
	[[AC_INIT([GNU fu], [1.0], [bug-fu@gnu.org])
	]])

	AT_CHECK_AUTOCONF
	AT_CHECK_CONFIGURE([-q])

	# Ensure we get the expected definition:
	AT_CHECK([grep "^PACKAGE_TARNAME='fu'\$" configure], [], [ignore])

	AT_CLEANUP


	## ------------------------------------- ##
	## AC_INIT with unusual version strings. ##
	## ------------------------------------- ##

	AT_SETUP([AC_INIT with unusual version strings])

	AT_DATA([configure.ac],
	[[AC_INIT([GNU String++ with spaces (foo)],
	[2.48++ (2010-07-03)], [[http://example.com/?a=b&c=d#e]], [clisp])
	AC_OUTPUT
	]])

	if echo 'abc' \| grep -F 'abc' >/dev/null 2>&1; then
	FGREP="grep -F"
	else
	FGREP=fgrep
	fi

	AT_CHECK_AUTOCONF([-Werror])
	AT_CHECK_CONFIGURE([-q])
	AT_CHECK_CONFIGURE([--help], [], [stdout])
	AT_CHECK([[$FGREP 'com/?a=b&c=d#e' stdout]], [], [ignore])
	AT_CHECK_CONFIGURE([--version], [], [stdout])
	AT_CHECK([$FGREP 'GNU String++ with spaces (foo)' stdout], [], [ignore])
	AT_CHECK([$FGREP '2.48++ (2010-07-03)' stdout], [], [ignore])

	AT_CHECK([./config.status --help], [], [stdout])
	AT_CHECK([[$FGREP 'com/?a=b&c=d#e' stdout]], [], [ignore])
	AT_CHECK([./config.status --version], [], [stdout])
	AT_CHECK([$FGREP 'GNU String++ with spaces (foo)' stdout], [], [ignore])
	AT_CHECK([$FGREP '2.48++ (2010-07-03)' stdout], [], [ignore])

	AT_DATA([configure.ac],
	[[AC_INIT([GNU "String++"],
	[2.48], [http://example.com/], [clisp])
	AC_OUTPUT
	]])

	AT_CHECK_AUTOCONF([-Werror], [1], [ignore], [stderr])
	AT_CHECK([grep 'AC_INIT: not a literal: ' stderr], [], [ignore])

	AT_DATA([configure.ac],
	[[AC_INIT([GNU String++],
	['codename' 2.48], [http://example.com/], [clisp])
	AC_OUTPUT
	]])

	AT_CHECK_AUTOCONF([-Werror], [1], [ignore], [stderr])
	AT_CHECK([grep 'AC_INIT: not a literal: ' stderr], [], [ignore])

	AT_DATA([configure.ac],
	[[AC_INIT([GNU
	String++], [2.48], [http://example.com/], [clisp])
	AC_OUTPUT
	]])

	AT_CHECK_AUTOCONF([-Werror], [1], [ignore], [stderr])
	AT_CHECK([grep 'AC_INIT: not a literal: ' stderr], [], [ignore])

	AT_CLEANUP


	## -------------- ##
	## AC_COPYRIGHT. ##
	## -------------- ##

	# Ensure the FSF notice as well as the user-provided one are present
	# in the head of the testsuite as well as the --version output.

	AT_SETUP([AC@&t@_COPYRIGHT])

	AT_DATA([configure.ac],
	[[AC_INIT([GNU fu], [1.0])
	AC_COPYRIGHT([[This is just a test notice, not a real one, so let's avoid
	words that may be matched by scanners for legal things,
	causing extra work for distributors.
	Multi-line values should be supported.
	]])
	]])

	AT_CHECK_AUTOCONF
	AT_CHECK_CONFIGURE([--version], [], [stdout])
	AT_CHECK([grep 'Copyright.*Free Software Foundation' stdout], [], [ignore])
	AT_CHECK([grep 'This is just a test notice' stdout], [], [ignore])
	AT_CHECK([sed -ne 50q -e '/Copyright/{' -e N -e N -e N -e N -e 's/#//g' ]dnl
	[ -e 's/\n//g' -e p -e '}' configure ]dnl
	[ \| grep 'Copyright.*Free Software Foundation'],
	[], [ignore])
	AT_CHECK([sed 50q configure \| grep 'This is just a test notice'], [], [ignore])

	AT_CLEANUP


	## ---------------- ##
	## AC_CACHE_CHECK. ##
	## ---------------- ##

	# Make sure AC_CACHE_CHECK is silent with -q.
	# Also make sure we warn about cache id's not named with `_cv_'.

	AT_SETUP([AC_CACHE_CHECK])
	AT_KEYWORDS([CONFIG_SITE])

	# Don't let a config.site file affect this test.
	AS_UNSET([CONFIG_SITE])

	AT_DATA([configure.ac],
	[[AC_INIT
	# m4_define([ac_nothing], [ac_cv_absolutely_nothing])
	AC_CACHE_CHECK([for nothing],
	[ac_nothing],
	[ac_nothing=found])

	AC_MSG_CHECKING([for some other variable])
	commands_to_set_it_was_run=false
	AC_CACHE_VAL([my_cv_variable], [
	# FOO
	commands_to_set_it_was_run=true
	my_cv_variable=true
	])
	AC_MSG_RESULT([$my_cv_variable])

	# Ensure that the result is available at this point.
	if ${my_cv_variable+false} :; then
	AC_MSG_ERROR([AC@&@&t@t@_CACHE_VAL did not ensure that the cache variable was set])
	fi

	# AC_CACHE_SAVE should be enough here, no need for AC_OUTPUT.
	AC_CACHE_SAVE
	]])

	AT_CHECK_AUTOCONF([], [], [], [stderr])
	AT_CHECK([grep 'must contain _cv_ to be cached' stderr], [], [ignore])

	# Do not warn about defines:
	sed 's/^# m4_define/m4_define/' configure.ac > t
	mv -f t configure.ac
	AT_CHECK_AUTOCONF
	AT_CHECK_CONFIGURE([-q])

	sed '/m4_define/d; s/ac_nothing/ac_cv_nothing/' configure.ac > t
	mv -f t configure.ac
	AT_CHECK_AUTOCONF
	AT_CHECK_CONFIGURE([-q])

	# Print a message saying that the result was cached, iff it was cached.
	AT_CHECK_CONFIGURE([], [], [stdout])
	AT_CHECK([grep 'cached' stdout], [1])
	AT_CHECK_CONFIGURE([my_cv_variable='yes it is set'], [], [stdout])
	AT_CHECK([grep 'cached.*yes it is set' stdout], [], [ignore])

	# --cache-file is honored and has caching semantics.
	AT_CHECK_CONFIGURE([--cache-file=foobar.cache], [], [stdout])
	AT_CHECK([grep 'cached' stdout], [1])
	AT_CHECK([test ! -f config.cache])
	AT_CHECK([grep 'my_cv_variable.*true' foobar.cache], [], [ignore])
	AT_CHECK_CONFIGURE([--cache-file=foobar.cache], [], [stdout])
	AT_CHECK([grep 'some other variable.cached.true' stdout], [], [ignore])

	# A setting on the command line overrides the cache.
	AT_CHECK_CONFIGURE([--cache-file=foobar.cache my_cv_variable='override'], [], [stdout])
	AT_CHECK([grep 'cached.*override' stdout], [], [ignore])
	AT_CHECK([grep 'my_cv_variable.*override' foobar.cache], [], [ignore])

	# Values containing braces need special internal treatment.
	AT_CHECK_CONFIGURE([-C ac_cv_nothing='{' my_cv_variable='contains } brace'],
	[], [stdout])
	AT_CHECK([grep 'ac_cv_nothing.*{' config.cache], [], [ignore])
	AT_CHECK([grep 'my_cv_variable.*contains } brace' config.cache], [], [ignore])
	AT_CHECK_CONFIGURE([-C], [], [stdout])
	AT_CHECK([grep 'nothing.*{' stdout], [], [ignore])
	AT_CHECK([grep 'some other variable.*contains } brace' stdout], [], [ignore])
	rm -f config.cache

	# Diagnose common side-effects that are errors in COMMANDS-TO-SET-IT:
	sed 's/^# FOO/AC_DEFINE([some-define], [1], [oooh.])/' configure.ac > t
	mv -f t configure.ac
	AT_CHECK_AUTOCONF([], [], [], [stderr])
	AT_CHECK([grep 'suspicious.*AC_DEFINE' stderr], [], [ignore])

	sed 's/^AC_DEFINE.*/AC_SUBST([some_substitution], [oooh.])/' configure.ac > t
	mv -f t configure.ac
	AT_CHECK_AUTOCONF([], [], [], [stderr])
	AT_CHECK([grep 'suspicious.*AC_SUBST' stderr], [], [ignore])

	# Ensure the examples from the manual work as intended.
	# Taken from autoconf.texi:Caching Results
	AT_DATA([configure.ac],
	[[AC_INIT
	AC_DEFUN([AC_SHELL_TRUE],
	[AC_CACHE_CHECK([whether true(1) works], [my_cv_shell_true_works],
	[my_cv_shell_true_works=no
	(true) 2>/dev/null && my_cv_shell_true_works=yes
	if test "x$my_cv_shell_true_works" = xyes; then
	AC_DEFINE([TRUE_WORKS], [1],
	[Define if `true(1)' works properly.])
	fi])
	])
	AC_SHELL_TRUE
	]])
	AT_CHECK_AUTOCONF([-Werror], [1], [], [stderr])
	AT_CHECK([grep 'suspicious.*AC_DEFINE' stderr], [], [ignore])

	# Taken from autoconf.texi:Caching Results
	AT_DATA([configure.ac],
	[[AC_INIT
	AC_DEFUN([AC_SHELL_TRUE],
	[AC_CACHE_CHECK([whether true(1) works], [my_cv_shell_true_works],
	[my_cv_shell_true_works=no
	(true) 2>/dev/null && my_cv_shell_true_works=yes])
	if test "x$my_cv_shell_true_works" = xyes; then
	AC_DEFINE([TRUE_WORKS], [1],
	[Define if `true(1)' works properly.])
	fi
	])
	AC_SHELL_TRUE
	AC_OUTPUT
	]])
	AT_CHECK_AUTOCONF([-Werror])
	AT_CHECK_CONFIGURE([-C], [], [stdout])
	AT_CHECK([grep my_cv_shell_true_works config.cache], [], [ignore])
	AT_CHECK([grep 'true.works.yes' stdout], [], [ignore])

	AT_CHECK_CONFIGURE([--config-cache], [], [stdout])
	AT_CHECK([grep 'true.works.cached.*yes' stdout], [], [ignore])

	# config.status only pays attention to the cache file with --recheck.
	AT_CHECK([./config.status], [], [stdout])
	AT_CHECK([grep cache stdout], [1])
	AT_CHECK([./config.status --recheck], [], [stdout])
	AT_CHECK([grep cache stdout], [0], [ignore])

	# By default, configure uses no cache file, neither loading nor updating it.
	: > a-stamp-file
	AT_CHECK_CONFIGURE([], [], [stdout])
	AT_CHECK([grep cache stdout], [1])
	AT_CHECK([LC_ALL=C ls -t config.cache a-stamp-file \| sed 1q \| grep config.cache], [1])

	# Using a symlinked cache file works.
	: > cache
	rm -f config.cache
	AS_LN_S([cache], [config.cache])
	AT_CHECK_CONFIGURE([-C])
	# Either the system does not support symlinks, or the symlinked-to file
	# should be updated.
	AT_CHECK([test -s cache \|\| test ! -h config.cache])

	# config.site can specify a site-wide cache, accumulating information.
	# Also test that we don't run afoul of sourcing a file with leading -.
	AT_DATA([-config.site],
	[[cache_file=sitecache
	]])
	AT_DATA([sitecache],
	[[my_cv_some_preset_cache_var=yes
	]])
	CONFIG_SITE=-config.site
	export CONFIG_SITE
	AT_CHECK_CONFIGURE
	AT_CHECK([grep my_cv_some_preset_cache_var sitecache], [], [ignore])
	AT_CHECK([grep my_cv_shell_true_works sitecache], [], [ignore])
	AT_CHECK_CONFIGURE([], [], [stdout])
	AT_CHECK([grep 'whether true.works.cached' stdout], [], [ignore])

	dnl Until we can find a way to avoid catastrophic failure,
	dnl skip the rest of this test on such shells.
	echo 'if' > syntax
	AT_CHECK([${CONFIG_SHELL-$SHELL} -c 'case `. ./syntax; echo $?` in
	0\|"") exit 77;; esac'], [0], [ignore], [ignore])

	# Check that config cache scripts must be well-formed.
	AT_DATA([bad.site],
	[[fi
	]])
	CONFIG_SITE=$PWD/bad.site
	AT_CHECK_CONFIGURE([ \|\| exit 1], [1], [stdout], [stderr])
	AT_CHECK([grep 'failed to load site script' stderr], [], [ignore], [ignore],
	[AT_CHECK([grep 'whether true' stdout], [1])])

	# However, a missing file is ignored.
	CONFIG_SITE=./no-such-file
	AT_CHECK_CONFIGURE

	AT_CLEANUP


	## --------------- ##
	## AC_CACHE_LOAD. ##
	## --------------- ##

	# Test AC_CACHE_LOAD.

	AT_SETUP([AC_CACHE_LOAD])

	AT_DATA([configure.ac],
	[[AC_INIT
	$some_test_code
	AC_CACHE_LOAD
	AC_MSG_NOTICE([some_cv_variable is $some_cv_variable])
	AC_OUTPUT
	]])
	AT_CHECK_AUTOCONF
	AS_UNSET([some_test_code])
	AT_DATA([new-cache],
	[[some_cv_variable=value-from-new-cache
	]])
	AT_CHECK_CONFIGURE([some_test_code='eval cache_file=new-cache'], [], [stdout])
	AT_CHECK([grep 'some_cv_variable.*value-from-new-cache' stdout], [], [ignore])

	AT_CLEANUP


	## ---------------- ##
	## AC_COMPUTE_INT. ##
	## ---------------- ##

	# Make sure AC_COMPUTE_INT fails properly.

	AT_SETUP([AC_COMPUTE_INT])

	AT_DATA([configure.ac],
	[[AC_INIT
	AC_COMPUTE_INT([invalid_expression],
	[0],
	[],
	[invalid_expression=failed])
	test "$invalid_expression" = failed \|\|
	AC_MSG_ERROR([0 evaluated to $invalid_expression instead of failing])
	]])

	AT_CHECK_AUTOCONF
	AT_CHECK_CONFIGURE

	AT_CLEANUP


	## ---------------- ##
	## AC_TRY_COMMAND. ##
	## ---------------- ##

	AT_SETUP([AC_TRY_COMMAND])

	AT_DATA([configure.ac],
	[[AC_INIT

	if AC_TRY_COMMAND([(echo "The Cat in the Hat";
	echo "The Hat in the Cat" >&2) \|
	grep \^The\ Cat\ in\ the\ Hat\$ >/dev/null]); then
	:
	else
	AC_MSG_ERROR([didn't see the Cat in the Hat])
	fi

	if AC_TRY_COMMAND([(echo "The Cat in the Hat";
	echo "The Hat in the Cat" >&2) \|
	grep \^The\ Hat\ in\ the\ Cat\$ >/dev/null]); then
	AC_MSG_ERROR([saw the Hat in the Cat])
	fi
	]])

	AT_CHECK_AUTOCONF
	AT_CHECK_CONFIGURE([-q])

	AT_CLEANUP


	## ------------ ##
	## Input/Output ##
	## ------------ ##

	AT_SETUP([Input/Output])

	AT_DATA([configure.ac],
	[[AC_INIT
	cat <&AS@&t@_ORIGINAL_STDIN_FD >&AS@&t@_MESSAGE_FD
	]])
	AT_CHECK_AUTOCONF
	AT_CHECK([echo Hello \| CONFIG_SITE=/dev/null ./configure $configure_options \| grep -v 'configure: loading site script '],, [Hello
	])
	AT_CHECK([echo Hello \| CONFIG_SITE=/dev/null ./configure $configure_options --silent])

	AT_CLEANUP


	## ------------------- ##
	## configure arguments ##
	## ------------------- ##

	AT_SETUP([configure arguments])

	AT_DATA([configure.ac],
	[[AC_INIT
	echo "$@"
	]])

	AT_CHECK_AUTOCONF
	AT_CHECK_CONFIGURE([FOO=bar --enable-baz --without-zork --silent], [0], [stdout], [ignore])
	AT_CHECK([grep 'FOO=bar --enable-baz --without-zork --silent' stdout], [0], [ignore], [ignore])

	dnl check that syntax error is detected
	AT_CHECK_CONFIGURE([=], [1], [], [ignore], [ignore])
	AT_CHECK_CONFIGURE([1=2], [1], [], [ignore], [ignore])

	AT_CLEANUP


	## ------------------------------ ##
	## AC_ARG_ENABLE and AC_ARG_WITH. ##
	## ------------------------------ ##

	AT_SETUP([AC_ARG_ENABLE and AC_ARG_WITH])

	AT_DATA_M4SH([configure.ac],
	[[AC_INIT
	# Taken from autoconf.texi:Pretty Help Strings.
	AC_ARG_WITH([foo],
	[AS_HELP_STRING([--with-foo],
	[use foo (default is no)])],
	[use_foo=$withval],
	[use_foo=no])
	AC_ARG_WITH([c++],
	[AS_HELP_STRING([--with-c++],
	[with c++])],
	[choice_with=$withval])
	AC_ARG_ENABLE([c++],
	[AS_HELP_STRING([--enable-c++],
	[enable c++])],
	[choice_enable=$enableval])
	echo "use_foo: $use_foo"
	echo "with_c++: $with_c__, $choice_with"
	echo "enable_c++: $enable_c__, $choice_enable"
	]])

	AT_CHECK_AUTOCONF
	AT_CHECK_CONFIGURE([--help \| grep foo], [0],
	[[ --with-foo use foo (default is no)
	]], [ignore])
	AT_CHECK_CONFIGURE([--with-foo=yes --with-c++ --disable-c++],
	[], [stdout], [ignore])
	AT_CHECK([grep 'use_foo: yes' stdout], [], [ignore])
	AT_CHECK([grep 'with_c++: yes, yes' stdout], [], [ignore])
	AT_CHECK([grep 'enable_c++: no, no' stdout], [], [ignore])
	AT_CHECK([grep 'unrecognized option' stdout], [1])
	AT_CHECK_CONFIGURE([--without-foo --with-c++=no --enable-c++=maybe],
	[], [stdout], [ignore])
	AT_CHECK([grep 'use_foo: no' stdout], [], [ignore])
	AT_CHECK([grep 'with_c++: no, no' stdout], [], [ignore])
	AT_CHECK([grep 'enable_c++: maybe, maybe' stdout], [], [ignore])
	AT_CHECK([grep 'unrecognized option' stdout], [1])
	AT_CHECK_CONFIGURE([], [], [stdout], [ignore])
	AT_CHECK([grep 'use_foo: no' stdout], [], [ignore])
	AT_CHECK([grep 'with_c++: , $' stdout], [], [ignore])
	AT_CHECK([grep 'enable_c++: , $' stdout], [], [ignore])
	AT_CHECK([grep 'unrecognized option' stdout], [1])

	AT_CLEANUP


	## --------------------- ##
	## configure directories ##
	## --------------------- ##

	AT_SETUP([configure directories])

	CONFIG_SITE=/dev/null
	export CONFIG_SITE

	AT_DATA([foo.in],
	[[prefix=@prefix@
	exec_prefix=@exec_prefix@
	libdir=@libdir@
	]])

	AT_DATA([configure.ac],
	[[AC_INIT
	AC_CONFIG_FILES([foo])
	AC_OUTPUT
	]])

	AT_CHECK_AUTOCONF
	dnl check that relative paths are rejected
	AT_CHECK_CONFIGURE([--libdir=.], [1], [ignore], [stderr])
	AT_CHECK([grep 'expected an absolute directory name for --libdir: \.' stderr],
	[0], [ignore])

	dnl check that extra slashes are stripped, and that defaults are not expanded
	AT_CHECK_CONFIGURE([--prefix=/usr//])
	AT_CHECK([cat foo], [0], [[prefix=/usr
	exec_prefix=${prefix}
	libdir=${exec_prefix}/lib
	]])

	AT_CLEANUP

	## ---------- ##
	## AC_SUBST. ##
	## ---------- ##

	AT_SETUP([AC_SUBST])
	AT_KEYWORDS([AS@&t@_IDENTIFIER_IF])

	# Check that a valid variable name is used.
	AT_DATA([configure.ac],
	[[AC_INIT([test], [1])
	AC_SUBST([1], [bar])
	AC_OUTPUT
	]])
	AT_CHECK_AUTOCONF([], [1], [], [stderr])
	AT_CHECK([grep 'not a valid shell variable' stderr], [], [ignore])

	AT_DATA([configure.ac],
	[[AC_INIT([test], [1])
	AC_SUBST([], [bar])
	AC_OUTPUT
	]])
	AT_CHECK_AUTOCONF([], [1], [], [stderr])
	AT_CHECK([grep 'not a valid shell variable' stderr], [], [ignore])

	AT_DATA([configure.ac],
	[[AC_INIT([test], [1])
	AC_SUBST([*], [bar])
	AC_OUTPUT
	]])
	AT_CHECK_AUTOCONF([], [1], [], [stderr])
	AT_CHECK([grep 'not a valid shell variable' stderr], [], [ignore])

	# Make sure AC_SUBST handles variables as expected.
	AT_DATA([file.in],
	[[@FOO@
	@BAR@
	FOO
	]])
	AT_DATA([configure.ac],
	[[AC_INIT([test], [0])
	m4_define([FOO], [baz])
	AC_SUBST([FOO], [bar])
	BAR=one
	AC_SUBST([B@&t@AR])
	BAR=two
	AC_CONFIG_FILES([file])
	AC_OUTPUT
	]])

	AT_CHECK_AUTOCONF([], [], [], [stderr])
	AT_CHECK_CONFIGURE
	AT_CHECK([cat file], [],
	[[bar
	two
	FOO
	]])

	AT_CLEANUP