mirror of
https://gitlab.xiph.org/xiph/ezstream.git
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9acbffc2dd
There are a few benefits to this, but the main reason is consistency and me completely understanding what's going on. Regressions are not expected, but wouldn't surprise either ... this needs lots of testing. git-svn-id: https://svn.xiph.org/trunk/ezstream@15776 0101bb08-14d6-0310-b084-bc0e0c8e3800
58 lines
1.7 KiB
Plaintext
58 lines
1.7 KiB
Plaintext
dnl $Id: vars.m4 947 2009-03-15 17:51:37Z mgrimm $
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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 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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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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$1="${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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