extern int vasprintf (char **ptr, const char *fmt, va_list ap);
XBT_PUBLIC(char*) bprintf (const char*fmt, ...) _XBT_GNUC_PRINTF(1,2);
extern int vasprintf (char **ptr, const char *fmt, va_list ap);
XBT_PUBLIC(char*) bprintf (const char*fmt, ...) _XBT_GNUC_PRINTF(1,2);