| ## --------------------------------- ## -*- Autoconf -*- |
| ## Check if --with-regex was given. ## |
| ## --------------------------------- ## |
| # Copyright (C) 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 |
| # Free Software Foundation, Inc. |
| # |
| # This file is free software; the Free Software Foundation |
| # gives unlimited permission to copy and/or distribute it, |
| # with or without modifications, as long as this notice is preserved. |
| |
| # serial 7 |
| |
| # AM_WITH_REGEX |
| # ------------- |
| # |
| # The idea is to distribute rx.[hc] and regex.[hc] together, for a |
| # while. The WITH_REGEX symbol is used to decide which of regex.h or |
| # rx.h should be included in the application. If `./configure |
| # --with-regex' is given (the default), the package will use gawk's |
| # regex. If `./configure --without-regex', a check is made to see if |
| # rx is already installed, as with newer Linux'es. If not found, the |
| # package will use the rx from the distribution. If found, the |
| # package will use the system's rx which, on Linux at least, will |
| # result in a smaller executable file. |
| # |
| # FIXME: This macro seems quite obsolete now since rx doesn't seem to |
| # be maintained, while regex is. |
| AC_DEFUN([AM_WITH_REGEX], |
| [AC_PREREQ(2.50)dnl |
| AC_LIBSOURCES([rx.h, rx.c, regex.c, regex.h])dnl |
| AC_MSG_CHECKING([which of GNU rx or gawk's regex is wanted]) |
| AC_ARG_WITH([regex], |
| [ --without-regex use GNU rx in lieu of gawk's regex for matching], |
| [test "$withval" = yes && am_with_regex=1], |
| [am_with_regex=1]) |
| if test -n "$am_with_regex"; then |
| AC_MSG_RESULT([regex]) |
| AC_DEFINE([WITH_REGEX], 1, [Define if using GNU regex]) |
| AC_CACHE_CHECK([for GNU regex in libc], [am_cv_gnu_regex], |
| [AC_TRY_LINK([], |
| [extern int re_max_failures; re_max_failures = 1], |
| [am_cv_gnu_regex=yes], |
| [am_cv_gnu_regex=no])]) |
| if test $am_cv_gnu_regex = no; then |
| AC_LIBOBJ([regex]) |
| fi |
| else |
| AC_MSG_RESULT([rx]) |
| AC_CHECK_FUNC([re_rx_search], , [AC_LIBOBJ([rx])]) |
| fi[]dnl |
| ]) |
| |
| AU_DEFUN([fp_WITH_REGEX], [AM_WITH_REGEX]) |