2 # m4-regex.m4 -- Use the installed regex if it is good enough.
3 # Written by Gary V. Vaughan <gary@gnu.org>
5 # Copyright (C) 2003-2004, 2006-2007, 2010, 2013 Free Software
8 # This file is part of GNU M4.
10 # GNU M4 is free software: you can redistribute it and/or modify
11 # it under the terms of the GNU General Public License as published by
12 # the Free Software Foundation, either version 3 of the License, or
13 # (at your option) any later version.
15 # GNU M4 is distributed in the hope that it will be useful,
16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 # GNU General Public License for more details.
20 # You should have received a copy of the GNU General Public License
21 # along with this program. If not, see <http://www.gnu.org/licenses/>.
25 # M4_REGEX([path/to/regex.c])
26 # ---------------------------
27 # Use the installed regex if it is good enough.
29 [AC_BEFORE([gl_REGEX], [M4_REGEX])
30 if test $ac_use_included_regex = no; then
31 INCLUDE_REGEX_H='#include <regex.h>'
34 INCLUDE_REGEX_H='#include <gnu/regex.h>'
38 AC_SUBST([INCLUDE_REGEX_H])