diff -rN -u old-stream-engine/configure.ac new-stream-engine/configure.ac
--- old-stream-engine/configure.ac	2008-03-28 19:00:08.000000000 +0000
+++ new-stream-engine/configure.ac	2008-03-28 19:00:08.000000000 +0000
@@ -48,6 +48,11 @@
 dnl decide error flags
 AS_COMPILER_FLAG(-Wall, ERROR_CFLAGS="-Wall", ERROR_CFLAGS="")
 AS_COMPILER_FLAG(-Werror, werror=yes, werror=no)
+
+AC_ARG_ENABLE(Werror,
+  AC_HELP_STRING([--disable-Werror],[compile without -Werror (normally enabled in development builds)]),
+    werror=$enableval, :)
+
 AS_COMPILER_FLAG(-Wextra, wextra=yes, wextra=no)
 AS_COMPILER_FLAG(-Wno-missing-field-initializers,
         wno_missing_field_initializers=yes,