dnl $Id$ dnl # Append or prepend items to a variable, but keep the items in the dnl # variable unique. dnl # Re-implemented from scratch after seeing XIPH_VAR_[PRE,AP]PEND, written dnl # by Karl Heyes of the Icecast project, in action. The end result turned dnl # out to be quite similar ... dnl # Copyright (c) 2008 Moritz Grimm dnl # dnl # Permission to use, copy, modify, and distribute this software for any dnl # purpose with or without fee is hereby granted, provided that the above dnl # copyright notice and this permission notice appear in all copies. dnl # dnl # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES dnl # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF dnl # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR dnl # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES dnl # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN dnl # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF dnl # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. dnl # AX_UNIQVAR_APPEND([VARIABLE], [ITEM-LIST]) dnl # AX_UNIQVAR_PREPEND([VARIABLE], [ITEM-LIST]) AC_DEFUN([AX_UNIQVAR_APPEND], [ AC_REQUIRE([AC_PROG_FGREP]) for arg in $2 do if `echo " ${$1} x" | ${FGREP} -v -e " ${arg} " > /dev/null`; then if test -z "${$1}"; then $1="${arg}" else $1="${$1} ${arg}" fi fi done ]) AC_DEFUN([AX_UNIQVAR_PREPEND], [ AC_REQUIRE([AC_PROG_FGREP]) _prepend_args="" for arg in $2 do _prepend_args="${arg} ${_prepend_args}" done for arg in ${_prepend_args} do if `echo " ${$1} x" | ${FGREP} -v -e " ${arg} " > /dev/null`; then if test -z "${$1}"; then $1="${arg}" else $1="${arg} ${$1}" fi fi done ])