2 # Process this file with autoconf to produce a configure script.
4 # Copyright (C) 1992, 1993, 1994, 1995, 1999, 2000, 2001, 2002, 2003,
5 # 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation,
8 # This program is free software: you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation, either version 3 of the License, or
11 # (at your option) any later version.
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
21 # We need AC_CONFIG_TESTDIR, AC_PROG_SED, AC_PROG_GREP.
24 AC_INIT([GNU Autoconf],
25 m4_esyscmd([build-aux/git-version-gen .tarball-version]),
26 [bug-autoconf@gnu.org])
27 AC_CONFIG_SRCDIR([ChangeLog])
29 AC_CONFIG_AUX_DIR([build-aux])
31 AM_INIT_AUTOMAKE([1.11 dist-bzip2 dist-xz
32 readme-alpha no-texinfo.tex std-options])
34 # We use `/bin/sh -n script' to check that there are no syntax errors
35 # in the scripts. Although incredible, there are /bin/sh that go into
36 # endless loops with `-n', e.g., SunOS's:
39 # SunOS ondine 4.1.3 2 sun4m unknown
46 # $ time sh endless.sh
47 # sh endless.sh 0,02s user 0,03s system 78% cpu 0,064 total
48 # $ time sh -nx endless.sh
49 # ^Csh -nx endless.sh 3,67s user 0,03s system 63% cpu 5,868 total
51 # Also, some implementations of /bin/sh (e.g., Solaris 8) are soooo slow
52 # that they are unusable on large scripts like our testsuite.
54 # So before using `/bin/sh -n' to check our scripts, we first check
55 # that `/bin/sh -n' is known to not have these problems.
57 AC_CACHE_CHECK([whether /bin/sh -n is known to work], [ac_cv_sh_n_works],
59 unset BASH_VERSION ZSH_VERSION
61 test -n "${BASH_VERSION+set}" || # Bash
62 test -n "${KSH_VERSION+set}" || # pdksh
63 test -n "${ZSH_VERSION+set}" || # zsh
64 test -n "${.sh.version}" # ksh93; put this last since its syntax is dodgy
67 then ac_cv_sh_n_works=yes
68 else ac_cv_sh_n_works=no
71 AC_SUBST([ac_cv_sh_n_works])
73 AC_MSG_CHECKING([for characters that cannot appear in file names])
74 AC_CACHE_VAL([ac_cv_unsupported_fs_chars],
75 [ac_cv_unsupported_fs_chars=
76 for c in '\\' \" '<' '>' '*' '?' '|'
78 touch "conftest.t${c}t" 2>/dev/null
79 test -f "conftest.t${c}t" && rm -f "conftest.t${c}t" && continue
80 # $c cannot be used in a file name.
81 ac_cv_unsupported_fs_chars=$ac_cv_unsupported_fs_chars$c
84 if test -n "$ac_cv_unsupported_fs_chars"; then
85 AC_MSG_RESULT([$ac_cv_unsupported_fs_chars])
90 AC_SUBST([ac_cv_unsupported_fs_chars])
92 AC_CACHE_CHECK([whether directories can have trailing spaces],
93 [ac_cv_dir_trailing_space],
94 [rm -rf 'conftest.d ' && mkdir 'conftest.d ' && touch 'conftest.d /tfile' 2>/dev/null
98 00) ac_cv_dir_trailing_space=yes ;; #(
99 *) ac_cv_dir_trailing_space=no ;;
102 AC_SUBST([ac_cv_dir_trailing_space])
104 # Initialize the test suite.
105 AC_CONFIG_TESTDIR([tests])
106 AC_CONFIG_FILES([tests/Makefile tests/atlocal])
107 AC_PATH_PROG([EXPR], [expr])
114 # We use an absolute name for GNU m4 so even if users have another m4 first in
115 # their path, the installer can configure with a path that has GNU m4
116 # on it and get that path embedded in the installed autoconf and
117 # autoheader scripts.
124 AC_CONFIG_FILES([man/Makefile])
125 AM_MISSING_PROG([HELP2MAN], [help2man])
132 # We use an absolute name for perl so the #! line in autoscan will work.
133 AC_PATH_PROG([PERL], [perl], [no])
135 if test "$PERL" = no; then
136 AC_MSG_ERROR([perl is not found])
138 $PERL -e 'require 5.005_03;' || {
139 AC_MSG_ERROR([Perl 5.005_03 or better is required])
142 # Find out whether the system supports flock
143 # Note this test does not try to find out whether it works with this
144 # particular file system. It merely avoids us running flock on systems
145 # where that bails out.
146 AC_CACHE_CHECK([whether $PERL Fcntl::flock is implemented],
147 [ac_cv_perl_flock_implemented],
148 [echo lock me > conftest.fil
149 if $PERL -e 'use Fcntl ":flock"; flock("conftest.fil", LOCK_EX); 1;'; then
150 ac_cv_perl_flock_implemented=yes
152 ac_cv_perl_flock_implemented=no
156 AC_SUBST([PERL_FLOCK], [$ac_cv_perl_flock_implemented])
163 AC_CONFIG_FILES([lib/emacs/Makefile])
165 test x"$TEST_EMACS" = xt && TEST_EMACS=
166 AC_CHECK_PROGS([TEST_EMACS], [emacs xemacs], [no])
168 # autoconf-mode.el and autotest-mode.el do not work with older version of
169 # Emacs (i.e. 18.x.x). During byte-compilation, Emacs complains:
170 # "Variable (broken nil) seen on pass 2 of byte compiler but not pass 1"
171 # We detect this problem here.
172 AS_IF([test "$TEST_EMACS" != no],
173 [AC_CACHE_CHECK([whether $TEST_EMACS is sufficiently recent],
174 [ac_cv_prog_emacs_ok],
175 [# Note: The quoted "EOF" is intentional. It protects the ` in the text.
176 cat >conftest.el << "EOF"
178 (defun broken-mode () (setq broken-defaults `(broken nil)))
181 [$TEST_EMACS -batch -q -f batch-byte-compile conftest.el 1>&2])],
182 [ac_cv_prog_emacs_ok=yes], [ac_cv_prog_emacs_ok=no])
183 rm -f conftest.el conftest.elc])
184 AS_IF([test $ac_cv_prog_emacs_ok = no], [TEST_EMACS=no])])
186 AC_SUBST([EMACS], [$TEST_EMACS])
202 AC_PROG_MAKE_CASE_SENSITIVE
209 dnl Allow maintainer rules under GNU make even in VPATH builds. This does
210 dnl not work in autoconf 2.61 or earlier, but we don't want to require
211 dnl unreleased autoconf during bootstrap, hence the version test.
212 dnl TODO remove the version check once we depend on autoconf 2.62.
213 dnl Meanwhile, we must use a shell variable so that we bypass automake's
214 dnl attempts to remove the sole copy of GNUmakefile in a non-VPATH build
215 dnl during 'make distclean'.
216 dnl TODO avoid the shell variable once automake is fixed.
217 GNUmakefile=GNUmakefile
218 m4_if(m4_version_compare([2.61a.100],
219 m4_defn([m4_PACKAGE_VERSION])), [1], [],
220 [AC_CONFIG_LINKS([$GNUmakefile:$GNUmakefile], [],
221 [GNUmakefile=$GNUmakefile])])
223 AC_CONFIG_FILES([Makefile doc/Makefile
224 lib/Makefile lib/Autom4te/Makefile lib/autoscan/Makefile
226 lib/autoconf/Makefile lib/autotest/Makefile
230 # Report the state of this version of Autoconf if this is a beta.
231 m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-a-z]],
234 You are about to use an experimental version of Autoconf. Be sure to
235 read the relevant mailing lists, most importantly <autoconf@gnu.org>.
237 Below you will find information on the status of this version of Autoconf.
240 sed -n '/^\* Status/,$p' $srcdir/BUGS