michael@0: dnl We are not running in a real autoconf environment. So we're using real m4
michael@0: dnl here, not the crazier environment that autoconf provides.
michael@0: 
michael@0: dnl Autoconf expects [] for quotes; give it to them
michael@0: changequote([, ])
michael@0: 
michael@0: dnl AC_DEFUN is provided to use instead of define in autoconf. Provide it too.
michael@0: define([AC_DEFUN], [define($1, [$2])])
michael@0: 
michael@0: dnl AC_ARG_ENABLE(FEATURE, HELP-STRING, IF-TRUE[, IF-FALSE])
michael@0: dnl We have to ignore the help string due to how help works in autoconf...
michael@0: AC_DEFUN([AC_ARG_ENABLE],
michael@0: [#] Check whether --enable-[$1] or --disable-[$1] was given.
michael@0: [if test "[${enable_]patsubst([$1], -, _)+set}" = set; then
michael@0:   enableval="[$enable_]patsubst([$1], -, _)"
michael@0:   $3
michael@0: ifelse([$4], , , [else
michael@0:   $4
michael@0: ])dnl
michael@0: fi
michael@0: ])
michael@0: 
michael@0: dnl AC_MSG_ERROR(error-description)
michael@0: AC_DEFUN([AC_MSG_ERROR], [{ echo "configure: error: $1" 1>&2; exit 1; }])
michael@0: 
michael@0: AC_DEFUN([AC_MSG_WARN],  [ echo "configure: warning: $1" 1>&2 ])
michael@0: 
michael@0: dnl Add the variable to the list of substitution variables
michael@0: AC_DEFUN([AC_SUBST],
michael@0: [
michael@0: _subconfigure_ac_subst_args="$_subconfigure_ac_subst_args $1"
michael@0: ])
michael@0: 
michael@0: dnl Override for AC_DEFINE.
michael@0: AC_DEFUN([AC_DEFINE],
michael@0: [
michael@0: cat >>confdefs.h <<\EOF
michael@0: [#define] $1 ifelse($#, 2, [$2], $#, 3, [$2], 1)
michael@0: EOF
michael@0: cat >> confdefs.pytmp <<\EOF
michael@0:     (''' $1 ''', ifelse($#, 2, [r''' $2 '''], $#, 3, [r''' $2 '''], ' 1 '))
michael@0: EOF
michael@0: ])
michael@0: 
michael@0: dnl AC_OUTPUT_SUBDIRS(subdirectory)
michael@0: AC_DEFUN([AC_OUTPUT_SUBDIRS], [do_output_subdirs "$1"])