| 1 | ## --------------------------------- ## -*- Autoconf -*-
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| 2 | ## Check if --with-regex was given. ##
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| 3 | ## --------------------------------- ##
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| 4 |
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| 5 | # Copyright (C) 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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| 6 | # Free Software Foundation, Inc.
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| 7 |
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| 8 | # This program is free software; you can redistribute it and/or modify
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| 9 | # it under the terms of the GNU General Public License as published by
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| 10 | # the Free Software Foundation; either version 2, or (at your option)
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| 11 | # any later version.
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| 12 |
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| 13 | # This program is distributed in the hope that it will be useful,
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| 14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | # GNU General Public License for more details.
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| 17 |
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| 18 | # You should have received a copy of the GNU General Public License
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| 19 | # along with this program; if not, write to the Free Software
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| 20 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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| 21 | # 02111-1307, USA.
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| 22 |
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| 23 | # serial 6
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| 24 |
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| 25 | # AM_WITH_REGEX
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| 26 | # -------------
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| 27 | #
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| 28 | # The idea is to distribute rx.[hc] and regex.[hc] together, for a
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| 29 | # while. The WITH_REGEX symbol is used to decide which of regex.h or
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| 30 | # rx.h should be included in the application. If `./configure
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| 31 | # --with-regex' is given (the default), the package will use gawk's
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| 32 | # regex. If `./configure --without-regex', a check is made to see if
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| 33 | # rx is already installed, as with newer Linux'es. If not found, the
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| 34 | # package will use the rx from the distribution. If found, the
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| 35 | # package will use the system's rx which, on Linux at least, will
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| 36 | # result in a smaller executable file.
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| 37 | #
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| 38 | # FIXME: This macro seems quite obsolete now since rx doesn't seem to
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| 39 | # be maintained, while regex is.
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| 40 | AC_DEFUN([AM_WITH_REGEX],
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| 41 | [AC_PREREQ(2.50)dnl
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| 42 | AC_LIBSOURCES([rx.h, rx.c, regex.c, regex.h])dnl
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| 43 | AC_MSG_CHECKING([which of GNU rx or gawk's regex is wanted])
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| 44 | AC_ARG_WITH([regex],
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| 45 | [ --without-regex use GNU rx in lieu of gawk's regex for matching],
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| 46 | [test "$withval" = yes && am_with_regex=1],
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| 47 | [am_with_regex=1])
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| 48 | if test -n "$am_with_regex"; then
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| 49 | AC_MSG_RESULT([regex])
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| 50 | AC_DEFINE([WITH_REGEX], 1, [Define if using GNU regex])
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| 51 | AC_CACHE_CHECK([for GNU regex in libc], [am_cv_gnu_regex],
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| 52 | [AC_TRY_LINK([],
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| 53 | [extern int re_max_failures; re_max_failures = 1],
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| 54 | [am_cv_gnu_regex=yes],
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| 55 | [am_cv_gnu_regex=no])])
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| 56 | if test $am_cv_gnu_regex = no; then
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| 57 | AC_LIBOBJ([regex])
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| 58 | fi
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| 59 | else
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| 60 | AC_MSG_RESULT([rx])
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| 61 | AC_CHECK_FUNC([re_rx_search], , [AC_LIBOBJ([rx])])
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| 62 | fi[]dnl
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| 63 | ])
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| 64 |
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| 65 | AU_DEFUN([fp_WITH_REGEX], [AM_WITH_REGEX])
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