dnl Thread related checks
-AC_ARG_WITH(threads, [ --with-threads Include tile loading threads [default=no]])
-if test "x$with_threads" = "xyes"; then
+# defaults to yes
+with_threads=yes
+AC_ARG_WITH(threads, [ --with-threads Include tile loading threads [default=yes]])
+if test "x$with_threads" = "xno"; then
+ AC_DEFINE([ENABLE_THREADS], 0, [Define to enable threaded tile paging])
+else
AC_DEFINE([ENABLE_THREADS], 1, [Define to enable threaded tile paging])
CXXFLAGS="$CXXFLAGS -D_REENTRANT"
CFLAGS="$CFLAGS -D_REENTRANT"