update alsa package to newest to support UCM.

media-libs/alsa-lib/alsa-lib-1.0.24.1.ebuild

+# Copyright 1999-2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/media-libs/alsa-lib/alsa-lib-1.0.24.1.ebuild,v 1.3 2011/02/17 17:26:29 sping Exp $
+
+EAPI=3
+
+PYTHON_DEPEND="python? 2"
+
+inherit eutils libtool python multilib
+
+MY_P=${P/_rc/rc}
+S=${WORKDIR}/${MY_P}
+
+DESCRIPTION="Advanced Linux Sound Architecture Library"
+HOMEPAGE="http://www.alsa-project.org/"
+SRC_URI="mirror://alsaproject/lib/${MY_P}.tar.bz2"
+
+LICENSE="LGPL-2.1"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~mips ~ppc ~ppc64 ~sh ~sparc ~x86 ~amd64-linux ~x86-linux"
+IUSE="doc debug alisp python static-libs"
+
+DEPEND=">=media-sound/alsa-headers-1.0.24
+        doc? ( >=app-doc/doxygen-1.2.6 )"
+RDEPEND=""
+
+IUSE_PCM_PLUGIN="copy linear route mulaw alaw adpcm rate plug multi shm file
+null empty share meter mmap_emul hooks lfloat ladspa dmix dshare dsnoop asym iec958
+softvol extplug ioplug"
+
+for plugin in ${IUSE_PCM_PLUGIN}; do
+        IUSE="${IUSE} alsa_pcm_plugins_${plugin}"
+done
+
+pkg_setup() {
+        if [ -z "${ALSA_PCM_PLUGINS}" ] ; then
+                ewarn "You haven't selected _any_ PCM plugins. Either you set it to something like the default"
+                ewarn "(which is being set in the profile UNLESS you unset them) or alsa based applications"
+                ewarn "are going to *misbehave* !"
+                epause 5
+        fi
+
+        if use python; then
+                python_set_active_version 2
+        fi
+}
+
+src_prepare() {
+        elibtoolize
+        epunt_cxx
+}
+
+src_configure() {
+        local myconf
+        use elibc_uclibc && myconf="--without-versioned"
+
+        econf \
+                $(use_enable static-libs static) \
+                --enable-shared \
+                --disable-resmgr \
+                --enable-rawmidi \
+                --enable-seq \
+                --enable-aload \
+                $(use_with debug) \
+                $(use_enable alisp) \
+                $(use_enable python) \
+                --with-pcm-plugins="${ALSA_PCM_PLUGINS}" \
+                --disable-dependency-tracking \
+                ${myconf}
+}
+
+src_compile() {
+        emake || die
+
+        if use doc; then
+                emake doc || die "failed to generate docs"
+                fgrep -Zrl "${S}" "${S}/doc/doxygen/html" | \
+                        xargs -0 sed -i -e "s:${S}::"
+        fi
+}
+
+src_install() {
+        emake DESTDIR="${D}" install || die
+
+        find "${ED}" -name '*.la' -exec rm -f {} +
+        find "${ED}"/usr/$(get_libdir)/alsa-lib -name '*.a' -exec rm -f {} +
+
+        dodoc ChangeLog TODO || die
+        use doc && dohtml -r doc/doxygen/html/*
+}
+
+pkg_postinst() {
+        elog "Please try in-kernel ALSA drivers instead of the alsa-driver ebuild."
+        elog "If alsa-driver works for you where a *recent* kernel does not, we want "
+        elog "to know about this. Our e-mail address is alsa-bugs@gentoo.org"
+        elog "However, if you notice no sound output or instability, please try to "
+        elog "upgrade your kernel to a newer version first."
+}