## --------------------------------- ##
## Check if --with-regex was given. ##
## --------------------------------- ##
# serial 1
# The idea is to distribute rx.[hc] and regex.[hc] together, for a while.
# The WITH_REGEX symbol (which should also be documented in acconfig.h)
# 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.
AC_DEFUN(AM_WITH_REGEX,
[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)
LIBOBJS="$LIBOBJS regex.o"
else
AC_MSG_RESULT(rx)
AC_CHECK_FUNC(re_rx_search, , [LIBOBJS="$LIBOBJS rx.o"])
fi
AC_SUBST(LIBOBJS)dnl
])
