#define SS_CHECKING(_what_) {                                                                                                  \
     int         _failed_checks=0; /*positive implies failure; negative implies skips*/                                         \
     const char *_what = _what_;                                                                                                \
     if (_print) fprintf(_print, "\n%s checking %s...\n", __FUNCTION__,  _what_);                                               \
     do {