2 # Process this file with autoconf to produce a configure script.
4 # Copyright (C) 1992-1995, 1999-2013 Free Software Foundation, Inc.
6 # This program is free software: you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation, either version 3 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
21 AC_INIT([GNU Autoconf],
22 m4_esyscmd([build-aux/git-version-gen .tarball-version]),
23 [bug-autoconf@gnu.org])
24 AC_CONFIG_SRCDIR([lib/autoconf/autoconf.m4])
26 AC_CONFIG_AUX_DIR([build-aux])
28 AM_INIT_AUTOMAKE([1.11 dist-xz readme-alpha no-texinfo.tex std-options])
32 # We use '/bin/sh -n script' to check that there are no syntax errors
33 # in the scripts. Although incredible, there are /bin/sh that go into
34 # endless loops with '-n', e.g., SunOS's:
37 # SunOS ondine 4.1.3 2 sun4m unknown
44 # $ time sh endless.sh
45 # sh endless.sh 0,02s user 0,03s system 78% cpu 0,064 total
46 # $ time sh -nx endless.sh
47 # ^Csh -nx endless.sh 3,67s user 0,03s system 63% cpu 5,868 total
49 # Also, some implementations of /bin/sh (e.g., Solaris 8) are soooo slow
50 # that they are unusable on large scripts like our testsuite.
52 # So before using '/bin/sh -n' to check our scripts, we first check
53 # that '/bin/sh -n' is known to not have these problems.
55 AC_CACHE_CHECK([whether /bin/sh -n is known to work], [ac_cv_sh_n_works],
57 unset BASH_VERSION ZSH_VERSION
59 test -n "${BASH_VERSION+set}" || # Bash
60 test -n "${KSH_VERSION+set}" || # pdksh
61 test -n "${ZSH_VERSION+set}" || # zsh
62 test -n "${.sh.version}" # ksh93; put this last since its syntax is dodgy
65 then ac_cv_sh_n_works=yes
66 else ac_cv_sh_n_works=no
69 AC_SUBST([ac_cv_sh_n_works])
71 AC_MSG_CHECKING([for characters that cannot appear in file names])
72 AC_CACHE_VAL([ac_cv_unsupported_fs_chars],
73 [ac_cv_unsupported_fs_chars=
74 for c in '\\' \" '<' '>' '*' '?' '|'
76 touch "conftest.t${c}t" 2>/dev/null
77 test -f "conftest.t${c}t" && rm -f "conftest.t${c}t" && continue
78 # $c cannot be used in a file name.
79 ac_cv_unsupported_fs_chars=$ac_cv_unsupported_fs_chars$c
82 if test -n "$ac_cv_unsupported_fs_chars"; then
83 AC_MSG_RESULT([$ac_cv_unsupported_fs_chars])
88 AC_SUBST([ac_cv_unsupported_fs_chars])
90 AC_CACHE_CHECK([whether directories can have trailing spaces],
91 [ac_cv_dir_trailing_space],
92 [rm -rf 'conftest.d ' && mkdir 'conftest.d ' && touch 'conftest.d /tfile' 2>/dev/null
96 00) ac_cv_dir_trailing_space=yes ;; #(
97 *) ac_cv_dir_trailing_space=no ;;
100 AC_SUBST([ac_cv_dir_trailing_space])
102 # Initialize the test suite.
103 AC_CONFIG_TESTDIR([tests])
104 AC_CONFIG_FILES([tests/Makefile tests/atlocal])
105 AC_PATH_PROG([EXPR], [expr])
112 # We use an absolute name for GNU m4 so even if users have another m4 first in
113 # their path, the installer can configure with a path that has GNU m4
114 # on it and get that path embedded in the installed autoconf and
115 # autoheader scripts.
122 AC_CONFIG_FILES([man/Makefile])
123 AM_MISSING_PROG([HELP2MAN], [help2man])
130 # We use an absolute name for perl so the #! line in autoscan will work.
131 AC_PATH_PROG([PERL], [perl], [no])
133 if test "$PERL" = no; then
134 AC_MSG_ERROR([perl is not found])
136 $PERL -e 'require 5.006;' || {
137 AC_MSG_ERROR([Perl 5.006 or better is required])
140 # Find out whether the system supports flock
141 # Note this test does not try to find out whether it works with this
142 # particular file system. It merely avoids us running flock on systems
143 # where that bails out.
144 AC_CACHE_CHECK([whether $PERL Fcntl::flock is implemented],
145 [ac_cv_perl_flock_implemented],
146 [echo lock me > conftest.fil
147 if $PERL -e 'use Fcntl ":flock"; flock("conftest.fil", LOCK_EX); 1;'; then
148 ac_cv_perl_flock_implemented=yes
150 ac_cv_perl_flock_implemented=no
154 AC_SUBST([PERL_FLOCK], [$ac_cv_perl_flock_implemented])
161 AC_CONFIG_FILES([lib/emacs/Makefile])
163 test x"$TEST_EMACS" = xt && TEST_EMACS=
164 AC_CHECK_PROGS([TEST_EMACS], [emacs xemacs], [no])
166 # autoconf-mode.el and autotest-mode.el do not work with older version of
167 # Emacs (i.e. 18.x.x). During byte-compilation, Emacs complains:
168 # "Variable (broken nil) seen on pass 2 of byte compiler but not pass 1"
169 # We detect this problem here.
170 AS_IF([test "$TEST_EMACS" != no],
171 [AC_CACHE_CHECK([whether $TEST_EMACS is sufficiently recent],
172 [ac_cv_prog_emacs_ok],
173 [# Note: The quoted "EOF" is intentional. It protects the ` in the text.
174 cat >conftest.el << "EOF"
176 (defun broken-mode () (setq broken-defaults `(broken nil)))
179 [$TEST_EMACS -batch -q -f batch-byte-compile conftest.el 1>&2])],
180 [ac_cv_prog_emacs_ok=yes], [ac_cv_prog_emacs_ok=no])
181 rm -f conftest.el conftest.elc])
182 AS_IF([test $ac_cv_prog_emacs_ok = no], [TEST_EMACS=no])])
184 AC_SUBST([EMACS], [$TEST_EMACS])
200 AC_PROG_MAKE_CASE_SENSITIVE
207 dnl Allow maintainer rules under GNU make even in VPATH builds.
208 AC_CONFIG_LINKS([GNUmakefile:GNUmakefile])
210 AC_CONFIG_FILES([Makefile doc/Makefile
211 lib/Makefile lib/Autom4te/Makefile lib/autoscan/Makefile
213 lib/autoconf/Makefile lib/autotest/Makefile
217 # Report the state of this version of Autoconf if this is a beta.
218 m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-a-z]],
221 You are about to use an experimental version of Autoconf. Be sure to
222 read the relevant mailing lists, most importantly <autoconf@gnu.org>.
224 Below you will find information on the status of this version of Autoconf.
227 sed -n '/^\* Status/,$p' $srcdir/BUGS