--- /dev/null
+#include <glib.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+static gboolean show;
+
+void ob_debug_show_output(gboolean enable)
+{
+ show = enable;
+}
+
+void ob_debug(char *a, ...)
+{
+ va_list vl;
+
+ if (show) {
+ va_start(vl, a);
+ vfprintf(stderr, a, vl);
+ }
+}