This seems necessary.

3e7822d6 · Hisham Muhammad · 5effb12e · 3e7822d6
Commit 3e7822d6 authored Nov 24, 2010 by Hisham Muhammad
--- a/autogen.sh
+++ b/autogen.sh
@@ -3,7 +3,7 @@
 aclocal -I m4
 autoconf
 autoheader
-libtoolize --copy
+libtoolize --copy --force
 automake --add-missing --copy