Applying Neon optimization patch to the LIBPNG library.

media-libs/libpng/libpng-1.2.44.ebuild

Index: media-libs/libpng/libpng-1.2.44.ebuild
diff --git a/media-libs/libpng/libpng-1.2.44.ebuild b/media-libs/libpng/libpng-1.2.44.ebuild
index f5b6bf4da9a00223e8ce13860449abdbc7c8dbc4..322a3e2a3e4626ad62c2a1a9f1163626d23b2435 100644
--- a/media-libs/libpng/libpng-1.2.44.ebuild
+++ b/media-libs/libpng/libpng-1.2.44.ebuild
@@ -2,7 +2,7 @@
 # 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/"
@@ -19,6 +19,11 @@ 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
 }