diff --git a/configure.in b/configure.ac
similarity index 100%
rename from configure.in
rename to configure.ac
diff --git a/m4/require_canonical.m4 b/m4/require_canonical.m4
new file mode 100644
index 000000000..2cf54ec20
--- /dev/null
+++ b/m4/require_canonical.m4
@@ -0,0 +1,3 @@
+AC_DEFUN([REQUIRE_CANONICAL], [
+    AC_REQUIRE(AC_CANONICAL_HOST)_LT_SET_OPTION([LT_INIT],[win32-dll])
+])dnl REQUIRE_CANONICAL