--- ecls-11.1.1-r1.ebuild	4 Mar 2011 20:55:03 -0000	1.1
+++ ecls-11.1.1-r1.ebuild	7 Mar 2011 10:16:05 -0000
@@ -14,13 +14,14 @@
 LICENSE="BSD LGPL-2"
 SLOT="0"
 KEYWORDS="~amd64 ~ppc ~sparc ~x86"
-IUSE="debug gengc precisegc threads +unicode X"
+IUSE="debug emacs gengc precisegc threads +unicode X"
 
 RDEPEND="dev-libs/gmp
 		virtual/libffi
 		>=dev-libs/boehm-gc-7.1[threads?]"
 DEPEND="${RDEPEND}
-		app-text/texi2html"
+		app-text/texi2html
+		emacs? ( virtual/emacs >=app-admin/eselect-emacs-1.12 )"
 PDEPEND="dev-lisp/gentoo-init"
 
 S="${WORKDIR}"/${MY_P}
@@ -55,6 +56,16 @@
 }
 
 src_compile() {
+	if use emacs; then
+		local ETAGS=$(eselect --brief etags list | sed -ne '/emacs/{p;q}')
+		[[ -n ${ETAGS} ]] || die "No etags implementation found"
+		pushd build || die
+		emake ETAGS=${ETAGS} TAGS || die
+		popd
+	else
+		touch build/TAGS
+	fi
+
 	#parallel fails
 	emake -j1 || die "Compilation failed"
 }