Applying Neon optimization patch to the LIBPNG library.

media-libs/libpng/libpng-1.2.44.ebuild

 # Copyright 1999-2010 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/media-libs/libpng/libpng-1.2.40.ebuild,v 1.10 2010/01/31 16:11:01 armin76 Exp $
 
-inherit libtool
+inherit libtool eutils
 
 DESCRIPTION="Portable Network Graphics library"
 HOMEPAGE="http://www.libpng.org/"
 SRC_URI="mirror://sourceforge/libpng/${P}.tar.bz2"
 
 LICENSE="as-is"
 SLOT="1.2"
 KEYWORDS="alpha amd64 arm hppa ia64 m68k ~mips ppc ppc64 s390 sh sparc x86 ~sparc-fbsd ~x86-fbsd"
 IUSE=""
 
 RDEPEND="sys-libs/zlib"
 DEPEND="${RDEPEND}"
 
 src_unpack() {
         unpack ${A}
         cd "${S}"
+        case ${CHOST} in
+                *arm*)
+                epatch "${FILESDIR}"/${PN}-1.2.44-neon-optimized.patch
+                ;;
+        esac
         # So we get sane .so versioning on FreeBSD
         elibtoolize
 }
 
 src_install() {
         emake DESTDIR="${D}" install || die
         dodoc ANNOUNCE CHANGES KNOWNBUG README TODO Y2KINFO
 }