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Replace BISON_PROG_GNU_M4 with Autoconf's AC_PROG_GNU_M4.

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If the first m4 in $PATH is wrong, it keeps looking.  Moreover, its
requirements for a correct m4 are stricter.
* m4/m4.m4: Make it a symbolic link to submodules/autoconf/m4/m4.m4.
* configure.ac: Update to use AC_PROG_GNU_M4.
Reported by Eric Blake.
This commit is contained in:
Joel E. Denny
2009-04-04 20:58:46 -04:00
parent 1c93f35bfa
commit 62c99cf4ea
3 changed files with 13 additions and 33 deletions
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9
ChangeLog
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@@ -1,3 +1,12 @@
2009-04-04 Joel E. Denny <jdenny@ces.clemson.edu>
Replace BISON_PROG_GNU_M4 with Autoconf's AC_PROG_GNU_M4.
If the first m4 in $PATH is wrong, it keeps looking. Moreover, its
requirements for a correct m4 are stricter.
* m4/m4.m4: Make it a symbolic link to submodules/autoconf/m4/m4.m4.
* configure.ac: Update to use AC_PROG_GNU_M4.
Reported by Eric Blake.
2009-04-03 Joel E. Denny <jdenny@ces.clemson.edu>
Help with updating web manual.

9
configure.ac
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@@ -1,7 +1,7 @@
# Configure template for GNU Bison. -*-Autoconf-*-
#
# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
# Foundation, Inc.
# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
# 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
@@ -92,10 +92,7 @@ AC_SUBST([YACC_LIBRARY])
AC_PROG_LEX
AC_PROG_YACC
AC_PROG_RANLIB
BISON_PROG_GNU_M4
if test x"$ac_cv_prog_gnu_m4" != xyes; then
AC_MSG_ERROR([GNU M4 1.4 is required])
fi
AC_PROG_GNU_M4
AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.])
AM_MISSING_PROG([HELP2MAN], [help2man])
AC_PATH_PROG([XSLTPROC], [xsltproc])

27
m4/m4.m4
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@@ -1,27 +0,0 @@
# Copyright 2000 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/>.
# BISON_PROG_GNU_M4
# -----------------
# Check for GNU m4, at least 1.3 (supports frozen files).
AC_DEFUN([BISON_PROG_GNU_M4],
[AC_PATH_PROGS(M4, gm4 gnum4 m4, m4)
AC_CACHE_CHECK(whether m4 supports frozen files, ac_cv_prog_gnu_m4,
[ac_cv_prog_gnu_m4=no
if test x"$M4" != x; then
case `$M4 --help < /dev/null 2>&1` in
*reload-state*) ac_cv_prog_gnu_m4=yes ;;
esac
fi])])

1
m4/m4.m4 Symbolic link
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@@ -0,0 +1 @@
../submodules/autoconf/m4/m4.m4