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c0af9c5e4e
* configure.ac: Reflect fact that change to git-version-gen produces -, but not always a letter, on non-release builds. * BUGS: Mention known issues. * lib/m4sugar/m4sh.m4 (_AS_DETECT_BETTER_SHELL): Ask for help in debugging platforms with deficient shells. Signed-off-by: Eric Blake <ebb9@byu.net>
194 lines
5.8 KiB
Plaintext
194 lines
5.8 KiB
Plaintext
# -*- Autoconf -*-
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# Process this file with autoconf to produce a configure script.
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# Copyright (C) 1992, 1993, 1994, 1995, 1999, 2000, 2001, 2002, 2003,
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# 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# We need AC_CONFIG_TESTDIR, AC_PROG_SED, AC_PROG_GREP.
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AC_PREREQ([2.60])
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AC_INIT([GNU Autoconf],
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m4_esyscmd([build-aux/git-version-gen .tarball-version]),
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[bug-autoconf@gnu.org])
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AC_CONFIG_SRCDIR([ChangeLog])
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AC_CONFIG_AUX_DIR([build-aux])
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AM_INIT_AUTOMAKE([1.10 dist-bzip2 readme-alpha no-texinfo.tex std-options])
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# We use `/bin/sh -n script' to check that there are no syntax errors
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# in the scripts. Although incredible, there are /bin/sh that go into
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# endless loops with `-n', e.g., SunOS's:
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#
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# $ uname -a
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# SunOS ondine 4.1.3 2 sun4m unknown
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# $ cat endless.sh
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# while false
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# do
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# :
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# done
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# exit 0
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# $ time sh endless.sh
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# sh endless.sh 0,02s user 0,03s system 78% cpu 0,064 total
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# $ time sh -nx endless.sh
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# ^Csh -nx endless.sh 3,67s user 0,03s system 63% cpu 5,868 total
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#
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# Also, some implementations of /bin/sh (e.g., Solaris 8) are soooo slow
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# that they are unusable on large scripts like our testsuite.
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# So before using `/bin/sh -n' to check our scripts, we first check
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# that `/bin/sh -n' is known to not have these problems.
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AC_CACHE_CHECK([whether /bin/sh -n is known to work], [ac_cv_sh_n_works],
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[if (
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unset BASH_VERSION ZSH_VERSION
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/bin/sh -c '
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test -n "${BASH_VERSION+set}" || # Bash
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test -n "${KSH_VERSION+set}" || # pdksh
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test -n "${ZSH_VERSION+set}" || # zsh
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test -n "${.sh.version}" # ksh93; put this last since its syntax is dodgy
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'
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) 2>/dev/null
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then ac_cv_sh_n_works=yes
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else ac_cv_sh_n_works=no
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fi
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])
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AC_SUBST([ac_cv_sh_n_works])
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# Initialize the test suite.
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AC_CONFIG_TESTDIR([tests])
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AC_CONFIG_FILES([tests/Makefile tests/atlocal])
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AC_PATH_PROG([EXPR], [expr])
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## ---- ##
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## M4. ##
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## ---- ##
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# We use an absolute name for GNU m4 so even if users have another m4 first in
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# their path, the installer can configure with a path that has GNU m4
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# on it and get that path embedded in the installed autoconf and
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# autoheader scripts.
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AC_PROG_GNU_M4
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## ----------- ##
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## Man pages. ##
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## ----------- ##
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AC_CONFIG_FILES([man/Makefile])
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AM_MISSING_PROG([HELP2MAN], [help2man])
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## ------ ##
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## Perl. ##
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## ------ ##
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# We use an absolute name for perl so the #! line in autoscan will work.
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AC_PATH_PROG([PERL], [perl], [no])
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AC_SUBST([PERL])dnl
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if test "$PERL" = no; then
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AC_MSG_ERROR([perl is not found])
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fi
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$PERL -e 'require 5.005_03;' || {
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AC_MSG_ERROR([Perl 5.005_03 or better is required])
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}
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## ------- ##
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## Emacs. ##
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## ------- ##
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AC_CONFIG_FILES([lib/emacs/Makefile])
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TEST_EMACS=$EMACS
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test x"$TEST_EMACS" = xt && TEST_EMACS=
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AC_CHECK_PROGS([TEST_EMACS], [emacs xemacs], [no])
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# autoconf-mode.el and autotest-mode.el do not work with older version of
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# Emacs (i.e. 18.x.x). During byte-compilation, Emacs complains:
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# "Variable (broken nil) seen on pass 2 of byte compiler but not pass 1"
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# We detect this problem here.
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AS_IF([test "$TEST_EMACS" != no],
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[AC_CACHE_CHECK([whether $TEST_EMACS is sufficiently recent],
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[ac_cv_prog_emacs_ok],
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[# Note: The quoted "EOF" is intentional. It protects the ` in the text.
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cat >conftest.el << "EOF"
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(defvar broken)
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(defun broken-mode () (setq broken-defaults `(broken nil)))
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EOF
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AS_IF([AC_RUN_LOG(
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[$TEST_EMACS -batch -q -f batch-byte-compile conftest.el 1>&2])],
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[ac_cv_prog_emacs_ok=yes], [ac_cv_prog_emacs_ok=no])
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rm -f conftest.el conftest.elc])
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AS_IF([test $ac_cv_prog_emacs_ok = no], [TEST_EMACS=no])])
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AC_SUBST([EMACS], [$TEST_EMACS])
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AM_PATH_LISPDIR
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## ------------ ##
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## Grep & sed. ##
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## ------------ ##
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AC_PROG_GREP
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AC_PROG_EGREP
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AC_PROG_SED
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## ----- ##
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## Make. ##
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## ----- ##
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AC_PROG_MAKE_CASE_SENSITIVE
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## ------------ ##
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## Conclusion. ##
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## ------------ ##
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dnl Allow maintainer rules under GNU make even in VPATH builds. This does
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dnl not work in autoconf 2.61 or earlier, but we don't want to require
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dnl unreleased autoconf during bootstrap, hence the version test.
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dnl TODO remove the version check once we depend on autoconf 2.62.
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dnl Meanwhile, we must use a shell variable so that we bypass automake's
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dnl attempts to remove the sole copy of GNUmakefile in a non-VPATH build
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dnl during 'make distclean'.
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dnl TODO avoid the shell variable once automake is fixed.
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GNUmakefile=GNUmakefile
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m4_if(m4_version_compare([2.61a.100],
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m4_defn([m4_PACKAGE_VERSION])), [1], [],
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[AC_CONFIG_LINKS([$GNUmakefile:$GNUmakefile], [],
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[GNUmakefile=$GNUmakefile])])
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AC_CONFIG_FILES([Makefile doc/Makefile
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lib/Makefile lib/Autom4te/Makefile lib/autoscan/Makefile
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lib/m4sugar/Makefile
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lib/autoconf/Makefile lib/autotest/Makefile
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bin/Makefile])
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AC_OUTPUT
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# Report the state of this version of Autoconf if this is a beta.
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m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-a-z]],
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[ cat <<EOF
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You are about to use an experimental version of Autoconf. Be sure to
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read the relevant mailing lists, most importantly <autoconf@gnu.org>.
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Below you will find information on the status of this version of Autoconf.
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EOF
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sed -n '/^\* Status/,$p' $srcdir/BUGS
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echo
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])dnl
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