#ifndef OPENSSL_NO_TRACE
if (category >= 0 || category < OSSL_TRACE_CATEGORY_NUM)
return set_trace_data(category, NULL, &prefix, NULL,
trace_attach_cb, trace_detach_cb);
#ifndef OPENSSL_NO_TRACE
if (category >= 0 || category < OSSL_TRACE_CATEGORY_NUM)
return set_trace_data(category, NULL, &prefix, NULL,
trace_attach_cb, trace_detach_cb);