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