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##
## $Header: /home/cvs/d4x/m4/am_with_rx.m4,v 1.1.1.1 2004/07/01 15:37:55 max Exp $
##
##
## 20/02/2002 by Zaufi
##
## 'Bcouse AM_WITH_REGEX too old and can't solve my problem
## with choosing right libraty to compile with (using redistributable
## object files (as original macro do) is not our way :)
##
## We export (and substitute) LIBRX variable wich should be added to Makefile.am
## into LDADD string for component wich is needed to be linked with librx.a...
## Also you must include the following code when choose that header to include
##
## #ifdef WITH_REGEX
## # include <regex.h>
## #else
## # ifdef __cplusplus
## extern "C" {
## # endif
## # include <rxposix.h>
## # ifdef __cplusplus
## }
## # endif
## #endif
##
## * I don't lnow why but 1.5 version (latest fow nowdays) can't be included
## into C++ code w/o extern "C"...
##
AC_DEFUN(AM_WITH_RX,
[
## Spam what we check...
AC_MSG_CHECKING(which of GNU rx or gawk's regex is wanted)
## Set initial value
am_with_rx="no"
LIBRX=""
## Get configurable parameter
AC_ARG_WITH(rx,
AC_HELP_STRING([--with-rx], [Use fastest GNU rx instead of gawk's regex for matching]),
[am_with_rx=$withval])
if test "$am_with_rx" = "yes"; then
AC_MSG_RESULT(rx)
AC_PATH_PROGS(LIBRX, librx.a, not_found, [/usr/local/lib:/usr/lib])
if test "$LIBRX" = "not_found"; then
AC_MSG_ERROR([*** Required library librx.a not found])
fi
else
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_MSG_RESULT(failure)
AC_MSG_ERROR([*** Can't find regex functions in your libc.\n*** Maybe it is time to update your system? :)])
fi
fi
AC_SUBST(LIBRX)
])
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