1 ## --------------------------------- ## -*- Autoconf -*-
2 ## Check if --with-regex was given. ##
3 ## --------------------------------- ##
4 # Copyright (C) 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
5 # 2010, 2011 Free Software Foundation, Inc.
7 # This file is free software; the Free Software Foundation
8 # gives unlimited permission to copy and/or distribute it,
9 # with or without modifications, as long as this notice is preserved.
16 # THIS MACRO IS OBSOLETE now, since rx doesn't seem to be maintained,
17 # while regex is. This macro should be removed in the next major
18 # automake version (1.12).
20 # The idea is to distribute rx.[hc] and regex.[hc] together, for a
21 # while. The WITH_REGEX symbol is used to decide which of regex.h or
22 # rx.h should be included in the application. If `./configure
23 # --with-regex' is given (the default), the package will use gawk's
24 # regex. If `./configure --without-regex', a check is made to see if
25 # rx is already installed, as with newer Linux'es. If not found, the
26 # package will use the rx from the distribution. If found, the
27 # package will use the system's rx which, on Linux at least, will
28 # result in a smaller executable file.
30 AC_DEFUN([AM_WITH_REGEX],
32 m4_warn([obsolete], [$0 is obsolete, since GNU rx is unmantained now])dnl
33 AC_LIBSOURCES([rx.h, rx.c, regex.c, regex.h])dnl
34 AC_MSG_CHECKING([which of GNU rx or gawk's regex is wanted])
36 [ --without-regex use GNU rx in lieu of gawk's regex for matching],
37 [test "$withval" = yes && am_with_regex=1],
39 if test -n "$am_with_regex"; then
40 AC_MSG_RESULT([regex])
41 AC_DEFINE([WITH_REGEX], 1, [Define if using GNU regex])
42 AC_CACHE_CHECK([for GNU regex in libc], [am_cv_gnu_regex],
44 [extern int re_max_failures; re_max_failures = 1],
45 [am_cv_gnu_regex=yes],
46 [am_cv_gnu_regex=no])])
47 if test $am_cv_gnu_regex = no; then
52 AC_CHECK_FUNC([re_rx_search], , [AC_LIBOBJ([rx])])
56 AU_DEFUN([fp_WITH_REGEX], [AM_WITH_REGEX])