--- libgc/autogen.sh~	2009-09-26 12:52:00.000000000 +0200
+++ libgc/autogen.sh	2016-03-19 09:11:24.967084360 +0100
@@ -5,7 +5,7 @@
 # These version are ok, pre-1.7 is not.  Post 1.7 may produce a lot of
 # warnings for unrelated projects, so prefer 1.7 for now.
 am_version=
-for v in 1.10 1.9 1.8 1.7; do
+for v in 1.15 1.10 1.9 1.8 1.7; do
     if type -p &>/dev/null automake-$v; then
 	am_version="-$v"
 	break