configure.ac

       AC_MSG_RESULT(no)
       ;;
  *)   AC_MSG_RESULT(yes)

       if test "x$IPV6_ENABLED" = "x1"; then
         AC_MSG_ERROR([ares doesn't work with ipv6, disable ipv6 to use ares])
       fi

       AC_DEFINE(USE_ARES, 1, [Define if you want to enable ares support])

       ares="yes"
       ;;
  esac ],
       AC_MSG_RESULT(no)
)

AM_CONDITIONAL(ARES, test x$ares = xyes)

AC_CONFIG_FILES([Makefile \
	   docs/Makefile \
           docs/examples/Makefile \
           docs/libcurl/Makefile \
	   include/Makefile \
	   include/curl/Makefile \
	   src/Makefile \
           lib/Makefile \
           tests/Makefile \
           tests/data/Makefile \
           tests/server/Makefile \
           tests/libtest/Makefile \
	   packages/Makefile \
	   packages/Win32/Makefile \
	   packages/Win32/cygwin/Makefile \
	   packages/Linux/Makefile \
	   packages/Linux/RPM/Makefile \
	   packages/Linux/RPM/curl.spec \
	   packages/Linux/RPM/curl-ssl.spec \
           packages/Solaris/Makefile \
           packages/DOS/Makefile \
           packages/EPM/curl.list \
           packages/EPM/Makefile \
           curl-config
])
AC_OUTPUT