--- /usr/portage/sys-libs/zlib/zlib-1.2.1-r2.ebuild	2004-07-22 07:10:21.000000000 +0200
+++ zlib-1.2.1-r2.ebuild	2004-07-26 01:39:48.000000000 +0200
@@ -11,7 +11,7 @@
 LICENSE="ZLIB"
 SLOT="0"
 KEYWORDS="x86 ~ppc sparc mips alpha arm hppa amd64 ~ia64 ~ppc64 s390"
-IUSE="build"
+IUSE="build asm"
 
 DEPEND="virtual/libc"
 
@@ -30,12 +30,39 @@
 }
 
 src_compile() {
+
+	local myflags=""
+	if use asm  # using asm optimisations
+	then
+		if use x86  # only for x86
+		then
+			local myarch="$(uname -m)"
+			case "$myarch" in
+			i[56]86)
+				append-flags -DASMV
+				replace-flags "-Os" "-O3"
+				replace-flags "-O1" "-O3"
+				replace-flags "-O2" "-O3"
+				cp contrib/asm${myarch/i/}/* .
+				epatch ${FILESDIR}/${P}-asm.patch
+				einfo "Using ${myarch} assembler optimisation..."
+				myflags="OBJA=match.o"
+				;;
+			*)
+				ewarn "No assembler optimisation available for this architecture!"
+				;;
+			esac
+		else
+			ewarn "No assembler optimisation available for this architecture!"
+		fi
+	fi
+
 	./configure --shared --prefix=/usr --libdir=/lib || die
-	emake || die
+	emake $myflags || die
 	make test || die
 
 	./configure --prefix=/usr --libdir=/lib || die
-	emake || die
+	emake $myflags || die
 }
 
 src_install() {
@@ -48,7 +75,7 @@
 
 	if ! use build ; then
 		doman zlib.3
-		dodoc FAQ README ChangeLog
+		dodoc ChangeLog FAQ README*
 		docinto txt
 		dodoc algorithm.txt
 	fi