iterating over arguments

[Sam Steingold]

Hi,
I have this:
(http://clisp.cvs.sourceforge.net/*checkout*/clisp/clisp/src/m4/clisp.m4)

dnl set variable $1 to the result of evaluating in clisp of $2
AC_DEFUN([CLISP_SET],[$1=`$cl_cv_clisp -q -norc -x '$2' 2>/dev/null | sed -e
's/^"//' -e 's/"$//'`])

AC_DEFUN([CL_CLISP_NEED_FFI],[AC_REQUIRE([CL_CLISP])dnl
AC_CACHE_CHECK([for FFI in CLISP], [cl_cv_clisp_ffi],
 [CLISP_SET(cl_cv_clisp_ffi,[[#+ffi "yes" #-ffi "no"]])])
test $cl_cv_clisp_ffi = no && AC_MSG_ERROR([FFI is missing in CLISP])])

instead I want

AC_DEFUN([CL_CLISP_REQUIRE_FEATURE],[dnl
....])

so what I will call it as
CL_CLISP_REQUIRE_FEATURE([ffi screen unicode])
and it will expand into something like

AC_CACHE_CHECK([for FFI in CLISP], [cl_cv_clisp_ffi],
 [CLISP_SET(cl_cv_clisp_ffi,[[#+ffi "yes" #-ffi "no"]])])
test $cl_cv_clisp_ffi = no && AC_MSG_ERROR([FFI is missing in CLISP])
AC_CACHE_CHECK([for SCREEN in CLISP], [cl_cv_clisp_screen],
 [CLISP_SET(cl_cv_clisp_screen,[[#+screen "yes" #-screen "no"]])])
test $cl_cv_clisp_screen = no && AC_MSG_ERROR([SCREEN is missing in CLISP])
AC_CACHE_CHECK([for UNICODE in CLISP], [cl_cv_clisp_unicode],
 [CLISP_SET(cl_cv_clisp_unicode,[[#+unicode "yes" #-unicode "no"]])])
test $cl_cv_clisp_unicode = no && AC_MSG_ERROR([UNICODE is missing in CLISP])

how do I do that?
thanks
Sam