mirror of
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62 lines
1.7 KiB
Plaintext
62 lines
1.7 KiB
Plaintext
dnl # Append or prepend items to a variable, but keep the items in the
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dnl # variable unique.
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dnl # Re-implemented from scratch after seeing XIPH_VAR_[PRE,AP]PEND, written
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dnl # by Karl Heyes of the Icecast project, in action. The end result turned
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dnl # out to be quite similar ...
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dnl # Copyright (c) 2008, 2009 Moritz Grimm <mgrimm@mrsserver.net>
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dnl #
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dnl # Permission to use, copy, modify, and distribute this software for any
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dnl # purpose with or without fee is hereby granted, provided that the above
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dnl # copyright notice and this permission notice appear in all copies.
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dnl #
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dnl # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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dnl # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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dnl # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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dnl # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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dnl # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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dnl # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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dnl # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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dnl # AX_UNIQVAR_APPEND([VARIABLE], [ITEM-LIST])
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dnl # AX_UNIQVAR_PREPEND([VARIABLE], [ITEM-LIST])
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AC_DEFUN([AX_UNIQVAR_APPEND],
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[
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AC_REQUIRE([AC_PROG_FGREP])
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for arg in $2
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do
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if `echo " ${$1} x" | ${FGREP} -v -e " ${arg} " > /dev/null`; then
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if test -z "${$1}"; then
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$1="${arg}"
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else
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$1="${$1} ${arg}"
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fi
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fi
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done
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])
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AC_DEFUN([AX_UNIQVAR_PREPEND],
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[
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AC_REQUIRE([AC_PROG_FGREP])
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_prepend_args=""
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for arg in $2
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do
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_prepend_args="${arg} ${_prepend_args}"
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done
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for arg in ${_prepend_args}
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do
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if `echo " ${$1} x" | ${FGREP} -v -e " ${arg} " > /dev/null`; then
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if test -z "${$1}"; then
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$1="${arg}"
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else
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$1="${arg} ${$1}"
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fi
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fi
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done
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])
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