Revert "Remove ebuild-helpers/preplib (bug 102297)"

This reverts commit 811689f349a91b44448bc8e294903abf990eac45. The preplib
helper is still used by at least by stable sys-libs/lib-compat ebuilds.

diff --git a/bin/ebuild-helpers/preplib b/bin/ebuild-helpers/preplib
new file mode 100755 (executable)
index 0000000..76aabe6
--- /dev/null
+++ b/bin/ebuild-helpers/preplib
@@ -0,0 +1,28 @@
+#!/bin/bash
+# Copyright 1999-2006 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+source "${PORTAGE_BIN_PATH:-/usr/lib/portage/bin}"/isolated-functions.sh
+
+eqawarn "QA Notice: Deprecated call to 'preplib'"
+
+LIBDIR_VAR="LIBDIR_${ABI}"
+if [ -n "${ABI}" -a -n "${!LIBDIR_VAR}" ]; then
+       CONF_LIBDIR="${!LIBDIR_VAR}"
+fi
+unset LIBDIR_VAR
+
+if [ -z "${CONF_LIBDIR}" ]; then
+       # we need this to default to lib so that things dont break
+       CONF_LIBDIR="lib"
+fi
+
+if [ -z "$1" ] ; then
+       z="${D}usr/${CONF_LIBDIR}"
+else
+       z="${D}$1/${CONF_LIBDIR}"
+fi
+
+if [ -d "${z}" ] ; then
+       ldconfig -n -N "${z}"
+fi