/* Avoid fn call and building parameter list if we're not outputting the information.
* Matters on feeble CPUs for DEBUG/INFO statements that are involved frequently */
+#define LOG_LEVEL_IS( FOO ) ((debug_level) >= (FOO))
#define LOG_DEBUG(expr ...) \
((debug_level >= LOG_LVL_DEBUG) ? log_printf_lf (LOG_LVL_DEBUG, __FILE__, __LINE__, __FUNCTION__, expr) , 0 : 0)