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# -*- Autoconf -*-
# m4-regex.m4 -- Use the installed regex if it is good enough.
# Written by Gary V. Vaughan <gary@gnu.org>
#
# Copyright (C) 2003-2004, 2006-2007, 2010, 2013-2014, 2017 Free
# Software Foundation, Inc.
#
# This file is part of GNU M4.
#
# GNU M4 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.
#
# GNU M4 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/>.
# serial 4
# M4_REGEX([path/to/regex.c])
# ---------------------------
# Use the installed regex if it is good enough.
AC_DEFUN([M4_REGEX],
[AC_BEFORE([gl_REGEX], [M4_REGEX])
if test $ac_use_included_regex = no; then
INCLUDE_REGEX_H='#include <regex.h>'
REGEX_H=
else
INCLUDE_REGEX_H='#include <gnu/regex.h>'
REGEX_H=regex.h
fi
AC_SUBST([REGEX_H])
AC_SUBST([INCLUDE_REGEX_H])
])# M4_REGEX
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