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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 $PATH is wrong, it keeps looking.  Moreover, its
requirements for a correct m4 are stricter.
* m4/m4.m4: Make it a symbolic link to submodules/autoconf/m4/m4.m4.
* configure.ac: Update to use AC_PROG_GNU_M4.
Reported by Eric Blake.
This commit is contained in:
Joel E. Denny
2009-04-04 20:58:46 -04:00
parent 1c93f35bfa
commit 62c99cf4ea
3 changed files with 13 additions and 33 deletions
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9
configure.ac
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@@ -1,7 +1,7 @@
# Configure template for GNU Bison. -*-Autoconf-*-
#
# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
# Foundation, Inc.
# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
# Free Software Foundation, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@@ -92,10 +92,7 @@ AC_SUBST([YACC_LIBRARY])
AC_PROG_LEX
AC_PROG_YACC
AC_PROG_RANLIB
BISON_PROG_GNU_M4
if test x"$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])