https://bugs.gentoo.org/show_bug.cgi?id=426262
diff --git a/eclass/autotools.eclass b/eclass/autotools.eclass
index 2710bf827b..76a5c2eade 100644
--- a/eclass/autotools.eclass
+++ b/eclass/autotools.eclass
@@ -341,10 +341,11 @@ eautoconf() {
echo
die "No configure.{ac,in} present!"
fi
- if [[ ${WANT_AUTOCONF} != "2.1" && -e configure.in ]] ; then
- eqawarn "This package has a configure.in file which has long been deprecated. Please"
- eqawarn "update it to use configure.ac instead as newer versions of autotools will die"
- eqawarn "when it finds this file. See https://bugs.gentoo.org/426262 for details."
+ if [[ ${WANT_AUTOCONF} != "2.1" && -e configure.in && ! -e configure.ac ]] ; then
+ eqawarn "This package has a configure.in file which has long been deprecated. Since no"
+ eqawarn "configure.ac is present either, we rename configure.in to configure.ac. If"
+ eqawarn "this causes problems, please file a bug report and make it block bug #426262."
+ mv configure.{in,ac} || die
fi
autotools_run_tool --at-m4flags autoconf "$@"
