? auto.patch
Index: autoconf-2.69.ebuild
===================================================================
RCS file: /var/cvsroot/gentoo-x86/sys-devel/autoconf/autoconf-2.69.ebuild,v
retrieving revision 1.22
diff -u -r1.22 autoconf-2.69.ebuild
--- autoconf-2.69.ebuild	3 Dec 2014 05:52:22 -0000	1.22
+++ autoconf-2.69.ebuild	18 Mar 2015 20:47:21 -0000
@@ -35,6 +35,10 @@
 		autoreconf -f -i || die
 	fi
 	find -name Makefile.in -exec sed -i '/^pkgdatadir/s:$:-@VERSION@:' {} +
+	sed -i \
+		-e "s:(autoconf):(autoconf-${SLOT}):" \
+		doc/autoconf.texi \
+		|| die
 }
 
 src_configure() {