dnl
dnl Autoconf support for external convergence layer
dnl

AC_DEFUN(AC_CONFIG_EXTERNAL_CL, [
    ac_ecl='yes'
    AC_ARG_ENABLE(ecl,
        AC_HELP_STRING([--disable-ecl],
    		   	[disable external convergence layer support]),
        ac_ecl=$enableval) 
    dnl
    dnl First make sure we even want it
    dnl
    if test "$ac_ecl" = no; then
        EXTERNAL_CL_ENABLED=0
    else
        if test ! "$XERCES_C_ENABLED" = 1 ; then
	    AC_MSG_ERROR([external convergence layer support requires xerces... install it or configure --disable-ecl])
        fi
        EXTERNAL_CL_ENABLED=1
        AC_DEFINE_UNQUOTED(EXTERNAL_CL_ENABLED, 1, [whether external convergence layer support is enabled])
    fi # EXTERNAL_CL_ENABLED
])