extern void vverbose(int level, const char *file, int line, const char *fmt, va_list args);
# define ERROR(...) do{if(verbosity>=0)verbose(3,__FILE__,__LINE__,__VA_ARGS__);}while(0)
extern void vverbose(int level, const char *file, int line, const char *fmt, va_list args);
# define ERROR(...) do{if(verbosity>=0)verbose(3,__FILE__,__LINE__,__VA_ARGS__);}while(0)